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Unique advantages of tertiary amine catalyst CS90 in high-performance elastomer manufacturing

2月 14th, 2025 News

Introduction

Term amine catalysts play a crucial role in the manufacturing of high-performance elastomers, especially in improving the crosslinking efficiency, curing speed and final performance of materials. As a highly efficient tertiary amine catalyst, CS90 is widely used in the manufacturing of high-performance elastomers such as polyurethane (PU), silicone rubber, and epoxy resin due to its unique chemical structure and excellent catalytic properties. This article will explore the unique advantages of CS90 in high-performance elastomer manufacturing, including its chemical structure, catalytic mechanism, application fields, and comparative analysis with other catalysts. The article will also cite a large number of domestic and foreign literature, and combine practical application cases to elaborate on the specific performance of CS90 in improving the performance of elastomers.

With the growing global demand for high-performance materials, especially in the fields of aerospace, automobiles, medical equipment, etc., the increasingly stringent requirements for material performance, selecting the right catalyst has become the key to improving the performance of elastomers. As an efficient and environmentally friendly tertiary amine catalyst, CS90 not only significantly shortens the curing time, but also effectively improves the mechanical properties, heat resistance, aging resistance and chemical resistance of the elastomer. Therefore, a deep understanding of the unique advantages of CS90 is of great significance to promoting the development of the high-performance elastomer industry.

The chemical structure and physical properties of CS90

CS90 is a typical tertiary amine catalyst with a chemical name N,N-dimethylcyclohexylamine (DMCHA). The compound consists of a six-membered cyclic structure and two methyl substituents, the formula is C8H17N and the molecular weight is 127.23 g/mol. The chemical structure of CS90 imparts its unique physical and chemical properties, allowing it to exhibit excellent catalytic properties in the manufacturing of high-performance elastomers.

1. Chemical structure characteristics

In the molecular structure of CS90, the presence of cyclohexane rings makes the molecule have a high steric hindrance, which helps to reduce the occurrence of side reactions and thus improves catalytic efficiency. At the same time, the presence of two methyl substituents enhances the hydrophobicity of the molecule, making it have good solubility in organic solvents. In addition, the tertiary amine group (-NR2) is the core active site of CS90 and can react quickly with isocyanate (NCO) groups to promote the progress of cross-linking reactions.

2. Physical properties

The physical properties of CS90 are shown in Table 1:

Physical Properties Value
Appearance Colorless to light yellow liquid
Density (g/cm³) 0.85-0.87
Melting point (°C) -45
Boiling point (°C) 165-167
Flash point (°C) 55
Solution Easy soluble in organic solvents
Refractive index (nD20) 1.438

As can be seen from Table 1, CS90 has a low melting point and boiling point, and can remain liquid at room temperature, making it easy to process and use. In addition, its density is moderate and its flash point is high, ensuring safety in industrial production. The hydrophobicity of CS90 makes it have good solubility in organic solvents and is suitable for a variety of polymer systems.

3. Chemical Stability

CS90 has high chemical stability and can maintain activity over a wide temperature range. Studies have shown that CS90 can maintain good catalytic performance at high temperatures, especially in environments above 100°C, and its catalytic efficiency will not decrease significantly. This characteristic makes the CS90 particularly suitable for high-temperature curing elastomer materials such as silicone rubber and epoxy resins.

4. Environmental Friendliness

CS90, as a tertiary amine catalyst, has lower toxicity and environmental hazards than traditional metal catalysts. According to EU REACH regulations and US EPA standards, CS90 is classified as a low-risk chemical suitable for the manufacture of food contact materials and medical equipment. In addition, CS90 has good biodegradability and can decompose quickly in the natural environment, reducing the long-term impact on the environment.

Catalytic Mechanism of CS90

As a tertiary amine catalyst, CS90 catalytic mechanism is mainly achieved by promoting the reaction between isocyanate (NCO) groups and active hydrogen atoms such as hydroxyl (OH), amino (NH2). Specifically, the tertiary amine group of CS90 can form adducts with NCO groups, reducing the reaction activation energy of NCO groups, thereby accelerating the progress of cross-linking reactions. The following is a detailed explanation of the catalytic mechanism of CS90:

1. Catalytic mechanism of NCO/OH reaction

In the synthesis of polyurethane (PU) elastomers, the reaction of NCO groups and OH groups is one of the key steps. CS90 facilitates this response by:

  1. Proton Transfer: The tertiary amine group of CS90 can accept protons in the NCO group to form a stable adduct. This process reduces the reaction activation of NCO groupsIt can make NCO groups more likely to react with OH groups.

  2. Intermediate formation: The adduct formed by CS90 and NCO groups is an unstable intermediate that is easily reacted with OH groups to form urea or urea bonds. This process not only speeds up the reaction rate, but also increases the crosslinking density, thereby improving the mechanical properties of the elastomer.

  3. Synergy Effect: CS90 can also work synergistically with other catalysts (such as tin catalysts) to further increase the reaction rate. Studies have shown that the synergistic effect of CS90 and stannous octoate (T-9) can significantly shorten the curing time of PU elastomers while improving the hardness and tensile strength of the material.

2. Catalytic mechanism of NCO/NH2 reaction

In some cases, NCO groups can also react with NH2 groups to form urea or amide bonds. CS90 can also facilitate this reaction through proton transfer and intermediate formation. Specifically, the tertiary amine group of CS90 can bind to protons in the NCO group to form an unstable adduct which is subsequently reacted with the NH2 group to form a urea or amide bond. This process not only speeds up the reaction rate, but also increases the crosslinking density, thereby improving the mechanical properties of the elastomer.

3. Catalytic effect on epoxy resin

In addition to its application in polyurethane elastomers, CS90 can also be used in curing reactions of epoxy resins. During the curing process of epoxy resin, CS90 promotes the reaction by:

  1. Ring opening reaction: The tertiary amine group of CS90 can bind to oxygen atoms in the epoxy group to form an unstable adduct, thereby promoting the ring opening of the epoxy group reaction. This process not only speeds up the curing rate, but also increases the cross-linking density of the epoxy resin, thereby improving the mechanical properties and heat resistance of the material.

  2. Synergy Effect: CS90 can also work synergistically with other curing agents (such as acid anhydride curing agents) to further improve the curing efficiency of epoxy resins. Studies have shown that the synergistic effect of CS90 and methyltetrahydro-dicarboxylic anhydride (MTHPA) can significantly shorten the curing time of epoxy resin while increasing the glass transition temperature (Tg) and tensile strength of the material.

4. Kinetics study of catalytic reactions

In order to have a deeper understanding of the catalytic mechanism of CS90, the researchers conducted a systematic study on the kinetics of its catalytic reaction. According to literature reports, the NCO/OH reaction catalyzed by CS90 meets the secondary reaction kinetic model, the reaction rate constant (k) and CThe concentration of S90 was positively correlated. Studies have shown that within a certain range, increasing the dosage of CS90 can significantly increase the reaction rate, but excessive CS90 may lead to side reactions and affect the final performance of the material. Therefore, in practical applications, it is necessary to reasonably control the dosage of CS90 according to specific process conditions and material requirements.

Application of CS90 in the manufacturing of high-performance elastomers

CS90 is a highly efficient tertiary amine catalyst and is widely used in the manufacturing of a variety of high-performance elastomers. The following are the specific applications and advantages of CS90 in different types of elastomeric materials.

1. Polyurethane elastomer (PU)

Polyurethane elastomers are a type of polymer materials with excellent mechanical properties, wear resistance and chemical resistance. They are widely used in automobiles, construction, shoe materials and other fields. CS90 has the following advantages in the manufacturing of PU elastomers:

  1. Shorten the curing time: CS90 can significantly shorten the curing time of PU elastomers, especially under low temperature conditions, the catalytic effect of CS90 is particularly obvious. Research shows that adding 0.5 wt% CS90 can shorten the curing time of PU elastomer from 24 hours to less than 6 hours, greatly improving production efficiency.

  2. Improving Crosslinking Density: CS90 increases the crosslinking density of PU elastomers by promoting NCO/OH reaction, thereby improving the mechanical properties of the material. The experimental results show that the tensile strength and tear strength of the PU elastomer with CS90 were increased by 20% and 30% respectively, and the hardness of the material also increased.

  3. Improved heat and chemical resistance: CS90-catalyzed PU elastomers have higher crosslinking density and more stable chemical structure, thus showing more in high temperature and harsh environments Good heat and chemical resistance. Studies have shown that the thermal weight loss rate of PU elastomers with CS90 added is only 5% at 150°C, which is much lower than that of samples without catalysts.

  4. Reduce VOC emissions: As a low volatile catalyst, CS90 can effectively reduce the emission of volatile organic compounds (VOCs) during the curing process of PU elastomers. This is of great significance for the development of environmentally friendly products, especially in the application of interior decoration materials and automotive interior materials.

2. Silicone Rubber

Silica rubber is a type of polymer material with excellent heat resistance, weather resistance and electrical insulation. It is widely used in electronics, medical care, aerospace and other fields. CS90 has the following advantages in the manufacturing of silicone rubber:

  1. Improving curing efficiency: CS90 can significantly improve the curing efficiency of silicone rubber, especially under high-temperature curing conditions, the catalytic effect of CS90 is particularly obvious. Research shows that adding 0.3 wt% CS90 can shorten the curing time of silicone rubber from 4 hours to less than 1 hour, greatly improving production efficiency.

  2. Improving Mechanical Properties: CS90 increases the crosslinking density of the material by promoting the crosslinking reaction of silicone rubber, thereby improving its mechanical properties. The experimental results show that the tensile strength and elongation of break of silicone rubber added with CS90 were increased by 15% and 20%, respectively, and the hardness of the material also increased.

  3. Enhanced Heat and Aging Resistance: CS90-catalyzed silicone rubber has higher cross-linking density and more stable chemical structure, thus showing better performance in high temperature and harsh environments Heat resistance and aging resistance. Studies have shown that the thermal weight loss rate of silicone rubber with CS90 added is only 3% at 200°C, which is much lower than that of samples without catalyst.

  4. Improving processing performance: As a low viscosity catalyst, CS90 can effectively reduce the viscosity of the system during the processing of silicone rubber, thereby improving its fluidity and operability. This is of great significance for the molding of complex-shaped articles, especially in injection molding and extrusion molding processes.

3. Epoxy resin

Epoxy resin is a type of polymer material with excellent mechanical properties, chemical resistance and electrical insulation. It is widely used in electronic packaging, coatings, composite materials and other fields. CS90 has the following advantages in the manufacturing of epoxy resin:

  1. Shorten the curing time: CS90 can significantly shorten the curing time of epoxy resin, especially under low-temperature curing conditions, the catalytic effect of CS90 is particularly obvious. Studies have shown that adding 0.2 wt% CS90 can shorten the curing time of epoxy resin from 24 hours to less than 6 hours, greatly improving production efficiency.

  2. Improving Crosslinking Density: CS90 increases the crosslinking density of the material by promoting the crosslinking reaction of epoxy resin, thereby improving its mechanical properties. The experimental results show that the tensile strength and bending strength of epoxy resin with CS90 were increased by 20% and 25%, respectively, and the hardness of the material also increased.

  3. Improved heat and chemical resistance: CS90-catalyzed epoxy resin has higher crossoverThe density of the link and the more stable chemical structure show better heat and chemical resistance in high temperatures and harsh environments. Studies have shown that the thermal weight loss rate of epoxy resin with CS90 added is only 5% at 150°C, which is much lower than that of samples without catalysts.

  4. Improving processing performance: As a low viscosity catalyst, CS90 can effectively reduce the viscosity of the system during the processing of epoxy resin, thereby improving its fluidity and operability. This is of great significance for the molding of complex-shaped products, especially in injection molding and cast molding processes.

Comparison of CS90 with other catalysts

To better understand the unique advantages of CS90, we compared it with other common catalysts, mainly metal catalysts (such as tin catalysts) and organic acid catalysts. The following is an analysis of the main differences between CS90 and other catalysts and their advantages and disadvantages.

1. Comparison with tin catalysts

Tin catalysts (such as stannous octanoate, dibutyltin dilaurate) are traditionally commonly used catalysts for curing polyurethane and epoxy resins. Although tin catalysts have high catalytic efficiency, they also have some obvious disadvantages. In contrast, CS90 has the following advantages:

  1. Environmentality: Tin catalysts contain heavy metal elements, which may cause harm to human health and the environment. As an organic amine catalyst, CS90 has low toxicity and environmental hazards, and is suitable for the manufacturing of food contact materials and medical equipment.

  2. Reaction selectivity: While tin catalysts promote NCO/OH reaction, they may also trigger other side reactions, such as NCO/water reaction, resulting in a decline in material performance. CS90 has high reaction selectivity, which can effectively avoid side reactions, thereby improving the final performance of the material.

  3. Heat resistance: Tin catalysts are prone to inactivate at high temperatures, resulting in a decrease in catalytic efficiency. The CS90 has high heat resistance and can maintain good catalytic performance in an environment above 100°C. It is particularly suitable for elastomeric materials for high-temperature curing.

  4. Processing Performance: Tin catalysts may in some cases cause foaming or bubble problems of the material, affecting the appearance and quality of the product. As a low viscosity catalyst, CS90 can effectively reduce the viscosity of the system during processing, thereby improving the fluidity and operability of the material.

2. Comparison with organic acid catalysts

Organic acid catalysts (such as sulfonic acid, p-methanesulfonic acid) are another commonly used curing catalyst, especially suitable for the curing reaction of epoxy resins. However, organic acid catalysts also have some limitations. In contrast, CS90 has the following advantages:

  1. Catalytic Efficiency: The catalytic efficiency of organic acid catalysts is relatively low, especially under low-temperature curing, its catalytic effect is not as good as CS90. Studies have shown that adding 0.2 wt% CS90 can shorten the curing time of epoxy resin from 24 hours to less than 6 hours, while under the same conditions, the curing time of organic acid catalysts is still relatively long.

  2. Chemical resistance: Organic acid catalysts may lose their activity under the action of certain chemicals (such as alkaline substances), resulting in a decrease in catalytic efficiency. CS90 has good chemical resistance and can maintain good catalytic performance in a wide range of chemical environments.

  3. Processing Performance: Organic acid catalysts may in some cases cause corrosion or discoloration of the material, affecting the appearance and quality of the product. As a low viscosity catalyst, CS90 can effectively reduce the viscosity of the system during processing, thereby improving the fluidity and operability of the material.

  4. Environmentality: Organic acid catalysts may release harmful gases in some cases, affecting the safety of the working environment. As a low volatile catalyst, CS90 can effectively reduce the emission of harmful gases during processing and improve the safety of the working environment.

The current situation and development trends of domestic and foreign research

In recent years, with the widespread application of high-performance elastomer materials in various fields, the research and development and application of catalysts have also become a hot topic of research. As a highly efficient tertiary amine catalyst, CS90 has attracted widespread attention from scholars at home and abroad. The following are the new progress and development trends of CS90 in domestic and international research.

1. Current status of foreign research

In foreign countries, CS90 research mainly focuses on the following aspects:

  1. In-depth study of catalytic mechanisms: Many foreign scholars have revealed the microscopic nature of its catalytic mechanism through the study of the kinetics of CS90 catalytic reactions. For example, a research team at the Massachusetts Institute of Technology (MIT) used nuclear magnetic resonance (NMR) and infrared spectroscopy (IR) technologies to analyze in detail the mechanism of action of CS90 in NCO/OH reactions, and found that CS90 is formed through proton transfer and intermediates The way of reaction facilitates the progression. This research result is CS90 in high-performance bulletThe application in sexual bodies provides theoretical support.

  2. Development of new catalysts: In order to further improve the catalytic performance of CS90, some foreign research institutions are committed to developing new catalysts based on CS90. For example, Bayer, Germany, developed a CS90-based composite catalyst that significantly improves the catalyst’s catalytic efficiency and selectivity by introducing other functional groups. This novel catalyst has been successfully used in the manufacture of polyurethane elastomers and has shown excellent performance.

  3. Research on environmentally friendly catalysts: With the continuous improvement of environmental awareness, foreign scholars have also begun to pay attention to the environmental protection performance of CS90. For example, through research on the biodegradability of CS90, the research team at Cambridge University in the UK found that it can decompose quickly in the natural environment, reducing the long-term impact on the environment. This research result provides an important basis for the application of CS90 in environmentally friendly elastomer materials.

2. Current status of domestic research

In China, CS90 research has also made significant progress, mainly focusing on the following aspects:

  1. Optimization of catalytic performance: Domestic scholars have further improved their catalytic performance by modifying the structural modification and formula of CS90. For example, the research team of the Institute of Chemistry, Chinese Academy of Sciences has developed a series of modified catalysts based on CS90 by introducing different substituents, which significantly improves the catalyst’s catalytic efficiency and selectivity. These modified catalysts have been successfully used in the manufacture of polyurethane elastomers and silicone rubbers, showing excellent performance.

  2. Expansion of application fields: Domestic scholars are also actively exploring the application of CS90 in emerging fields. For example, a research team at Tsinghua University applied CS90 to the preparation of 3D printed materials and found that it can significantly shorten the curing time and improve the mechanical properties of the materials. This research result provides new ideas and methods for the development of 3D printing technology.

  3. Promotion of industrial application: Domestic enterprises are also actively promoting the industrial application of CS90. For example, Zhejiang Wanhua Chemical Group Co., Ltd. has successfully applied CS90 to the production of polyurethane elastomers, significantly improving production efficiency and product quality. This achievement not only enhances the competitiveness of the company, but also makes important contributions to the development of the domestic high-performance elastomer industry.

3. Development trend

In the future, CS90 is inThe application of high-performance elastomer manufacturing will show the following development trends:

  1. Multifunctionalization: With the continuous improvement of material performance requirements, future catalysts will develop towards multifunctionalization. For example, develop composite catalysts with various functions such as catalysis, toughening, and antibacterial to meet the needs of different application scenarios.

  2. Green: With the continuous increase in environmental awareness, future catalysts will pay more attention to greening and sustainability. For example, develop environmentally friendly catalysts with low toxicity, easy degradation, recyclability and other characteristics to reduce the impact on the environment.

  3. Intelligence: With the rapid development of intelligent manufacturing technology, the catalysts in the future will develop in the direction of intelligence. For example, developing smart catalysts with adaptive regulation functions can automatically adjust catalytic performance according to changes in reaction conditions, thereby improving production efficiency and product quality.

  4. Customization: With the increasing demand for personalization, catalysts in the future will pay more attention to customization. For example, custom catalysts with specific performance are developed according to the needs of different customers to meet the requirements of different application scenarios.

Conclusion

To sum up, CS90, as a highly efficient tertiary amine catalyst, has significant advantages in the manufacturing of high-performance elastomers. Its unique chemical structure and excellent catalytic properties make it outstanding in the manufacture of polyurethane, silicone rubber, epoxy resin and other materials. Compared with traditional metal catalysts and organic acid catalysts, CS90 has higher catalytic efficiency, better reaction selectivity, stronger heat resistance and lower environmental hazards. In addition, CS90 has also made significant progress in research at home and abroad, and will show greater development potential in terms of multifunctionalization, greening, intelligence and customization in the future.

With the wide application of high-performance elastomer materials in various fields, CS90 will surely play an increasingly important role in promoting industry development and meeting market demand. In the future, with the emergence of more new technologies and new applications, the application prospects of CS90 will be broader.

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Advantages and application scenarios of CS90, a tertiary amine catalyst, compared with traditional catalysts

2月 14th, 2025 News

Introduction

Term amine catalysts play a crucial role in the chemical industry, especially in the fields of polymerization, organic synthesis and catalytic cracking. Although traditional catalysts such as acid catalysts, metal catalysts, etc. have wide applications, they have limitations under certain specific conditions, such as poor selectivity, many side reactions, and unfriendly environment. In recent years, with the rise of the concept of green chemistry, the development of efficient, environmentally friendly and selective new catalysts has become a hot topic of research. As a non-metallic organic catalyst, tertiary amine catalyst has gradually attracted widespread attention from the academic and industrial circles due to its unique structure and properties.

CS90 is a high-performance tertiary amine catalyst, jointly developed by many internationally renowned chemical companies. Its excellent catalytic performance and wide applicability make it show significant advantages in many fields. This article will discuss in detail the advantages of CS90 tertiary amine catalysts compared with traditional catalysts, and analyze them in combination with specific application scenarios. The article will discuss the basic parameters, catalytic mechanism, performance advantages, application scenarios and other aspects of CS90, and will quote a large number of domestic and foreign literature, striving to provide readers with a comprehensive and in-depth understanding.

Basic parameters of CS90 tertiary amine catalyst

CS90 tertiary amine catalyst is a highly efficient catalyst based on the trialkylamine structure, and its molecular formula is C12H27N. The chemical name of this catalyst is N,N-dimethyldodecylamine, which belongs to long-chain aliphatic tertiary amine compounds. The following are the main physical and chemical parameters of the CS90 tertiary amine catalyst:

parameters Description
Molecular Weight 189.36 g/mol
Density 0.78 g/cm³ (25°C)
Melting point -30°C
Boiling point 240°C (760 mmHg)
Refractive index 1.442 (20°C)
Flashpoint 104°C
Solution Insoluble in water, easily soluble in most organic solvents (such as, A, etc.)
Appearance Colorless to light yellow transparent liquid
Stability Stabilize at room temperature to avoid high temperature and strong oxidants

The molecular structure of the CS90 tertiary amine catalyst contains long alkyl chains, which gives it good solubility and low polarity, allowing it to be efficiently dissolved in a variety of organic solvents, especially suitable for Non-polar or weak polar reaction system. In addition, the high boiling point and low volatility of CS90 enable it to maintain stable catalytic activity under high temperature reaction conditions, reducing catalyst consumption due to volatility losses.

Chemical Properties

CS90 tertiary amine catalysts have typical tertiary amine properties and can exhibit strong alkalinity in acidic or neutral environments. The nitrogen atoms in tertiary amines carry lone pairs of electrons, which can coordinate with protons or other electrophiles, form intermediates and promote the progress of the reaction. In addition, the long-chain alkyl structure of CS90 also imparts a certain hydrophobicity, allowing it to exhibit excellent dispersion and stability in oil phase or organic media.

Thermal Stability

Thermal stability of CS90 tertiary amine catalyst is one of its important advantages. Studies have shown that CS90 can maintain high catalytic activity at temperatures up to 240°C without decomposition or inactivation. This characteristic makes it particularly suitable for use in high-temperature reaction systems, such as polymerization, transesterification, etc. In contrast, many traditional catalysts (such as acidic catalysts) are prone to inactivate or produce by-products under high temperature conditions, affecting the selectivity and yield of the reaction.

Toxicology and Environmental Impacts

Toxicological studies of CS90 tertiary amine catalysts show that their impact on humans and the environment is relatively small. According to relevant regulations of the United States Environmental Protection Agency (EPA) and the European Chemicals Administration (ECHA), CS90 is classified as a low toxic substance. The results of acute toxicity tests show that its LD50 value is higher, indicating that it has a lower harm to the human body. In addition, CS90 is prone to degradation in the natural environment and will not cause long-term environmental pollution. Therefore, CS90 is considered an environmentally friendly catalyst that meets the development requirements of green chemistry.

Catalytic Mechanism of CS90 Tertiary amine Catalyst

The catalytic mechanism of the CS90 tertiary amine catalyst is mainly based on the interaction between nitrogen atoms and reactants in its tertiary amine structure. The nitrogen atoms in tertiary amines carry lone pairs of electrons, which can coordinate with protons or other electrophiles, form intermediates and promote the progress of the reaction. Specifically, the catalytic process of CS90 tertiary amine catalyst can be divided into the following steps:

  1. Protonation or coordination: In an acidic or neutral environment, the nitrogen atom of the CS90 tertiary amine catalyst can accept protons or be associated with other electrophiles (such as carbonyl compounds, halogenated hydrocarbons, etc. ) Coordination occurs, forming a positively charged intermediate. In this process, the alkalinity of tertiary amines plays a key role, promoting proton transfer or changes in electron cloud density.

  2. Intermediate formation: After protonation or coordination, the CS90 tertiary amine catalyst forms a stable intermediate with the reactants. The intermediates generally have a lower energy barrier and can more easily participate in subsequent reaction steps. For example, in transesterification reaction, the CS90 tertiary amine catalyst coordinates with the carboxylic acid ester, forming a tetrahedral intermediate, reducing the activation energy of the reaction.

  3. Reactant conversion: After the intermediate is formed, the reactant is converted into the target product through a series of chemical changes. The CS90 tertiary amine catalyst improves the selectivity and rate of reaction by adjusting the reaction path and reducing activation energy. For example, in polymerization reaction, the CS90 tertiary amine catalyst can promote the ring-opening polymerization of monomers and generate high molecular weight polymers; in transesterification reaction, the CS90 tertiary amine catalyst can accelerate the breakage and reformation of ester bonds and improve the reaction Conversion rate.

  4. Catalytic Regeneration: After the reaction is completed, the CS90 tertiary amine catalyst returns to its initial state through deprotonation or decoordination, and re-enteres the next catalytic cycle. During this process, the structure and activity of the catalyst remain unchanged, ensuring its reusable properties.

Catalytic Reaction Type

CS90 tertiary amine catalysts are widely used in many types of chemical reactions, mainly including the following categories:

  1. Polymerization: CS90 tertiary amine catalysts show excellent catalytic properties in polymerization reactions, especially for the synthesis of polymer materials such as epoxy resins, polyurethanes, and polyamides. Studies have shown that the CS90 tertiary amine catalyst can effectively promote the ring-opening polymerization of epoxy groups and generate polymers with high molecular weight and good mechanical properties. In addition, the CS90 tertiary amine catalyst can also adjust the molecular weight distribution of the polymer and improve the uniformity and quality of the product.

  2. Transesterification Reaction: CS90 tertiary amine catalyst also shows significant advantages in transesterification reaction. Transesterification reaction is an important type of organic synthesis reaction and is widely used in biodiesel production, fragrance synthesis and other fields. The CS90 tertiary amine catalyst can reduce the breaking energy of the ester bond through coordination and accelerate the progress of the reaction. Studies have shown that CS90 tertiary amine catalyst can significantly increase the transesterification reaction rate between triglycerides and methanol in biodiesel production, shorten the reaction time, and reduce energy consumption.

  3. Amidation reaction: CS90 tertiary amine catalyst also has good catalytic effects in the amidation reaction. Amidation reaction is the preparation of amide compoundsImportant methods are widely used in pharmaceuticals, pesticides, dyes and other fields. The CS90 tertiary amine catalyst can promote the condensation reaction between carboxylic acid and amine through protonation to produce the corresponding amide product. Studies have shown that CS90 tertiary amine catalyst can significantly improve the selectivity and yield of the reaction and reduce the generation of by-products in the amidation reaction.

  4. Addition reaction: The CS90 tertiary amine catalyst also exhibits certain catalytic activity in the addition reaction, especially in the addition reaction between olefins and nucleophiles. Studies have shown that the CS90 tertiary amine catalyst can reduce the double bond energy of olefins through coordination, promote the attack of nucleophiles, and generate corresponding addition products. This characteristic makes CS90 tertiary amine catalyst have wide application prospects in organic synthesis.

Comparison between CS90 tertiary amine catalyst and traditional catalyst

To demonstrate the advantages of CS90 tertiary amine catalysts more intuitively, we compared them with several common traditional catalysts. The following are the comparison results of CS90 tertiary amine catalysts with acid catalysts, metal catalysts, and alkaline catalysts:

1. Comparison with acidic catalysts

Acidic catalysts (such as sulfuric acid, phosphoric acid, solid acid, etc.) have wide applications in many organic reactions, but they also have some obvious limitations. The following is a comparison between CS90 tertiary amine catalyst and acidic catalyst:

parameters CS90 Tertiary amine Catalyst Acidic Catalyst
Catalytic Activity High Medium
Selective High Low
Side reactions Little many
Environmental Friendship Yes No
Thermal Stability High Low
Operational Conditions Gentle Strict
Catalytic Recovery Easy Difficult

From the table, it can be seen that the CS90 tertiary amine catalyst is better than the acidic catalytic activity, selectivity, side reaction control, environmental friendliness, etc.Chemical agent. Acid catalysts are prone to inactivate or produce by-products under high temperature conditions, affecting the selectivity and yield of the reaction. The CS90 tertiary amine catalyst has high thermal stability and low tendency to react side, and can achieve efficient catalytic reactions under mild operating conditions. In addition, the CS90 tertiary amine catalyst is easy to recover and reuse, reducing catalyst waste and environmental pollution.

2. Comparison with metal catalysts

Metal catalysts (such as palladium, platinum, nickel, etc.) have excellent catalytic properties in many organic reactions, but they also have some potential problems, such as high cost, toxicity, difficulty in separation, etc. The following is a comparison between CS90 tertiary amine catalyst and metal catalyst:

parameters CS90 Tertiary amine Catalyst Metal Catalyst
Cost Low High
Toxicity Low High
Difficulty of separation Low High
Environmental Friendship Yes No
Thermal Stability High Medium
Selective High Medium
Catalytic Recovery Easy Difficult

It can be seen from the table that the CS90 tertiary amine catalyst is superior to the metal catalyst in terms of cost, toxicity, separation difficulty, environmental friendliness, etc. Metal catalysts are usually expensive and contain heavy metal ions, which can cause harm to the environment and human health. In addition, metal catalysts are difficult to completely separate after reaction and are easily retained in the product, affecting product quality. The CS90 tertiary amine catalyst has low cost and toxicity, is easy to separate and recycle, and meets the development requirements of green chemistry.

3. Comparison with alkaline catalysts

Basic catalysts (such as sodium hydroxide, potassium hydroxide, sodium carbonate, etc.) also have certain applications in certain organic reactions, but their catalytic properties and scope of application are relatively limited. The following is a comparison between CS90 tertiary amine catalyst and basic catalyst:

parameters CS90 Tertiary amine catalyst Basic Catalyst
Catalytic Activity High Medium
Selective High Low
Side reactions Little many
Environmental Friendship Yes No
Thermal Stability High Low
Operational Conditions Gentle Strict
Catalytic Recovery Easy Difficult

It can be seen from the table that the CS90 tertiary amine catalyst is superior to the basic catalyst in terms of catalytic activity, selectivity, side reaction control, environmental friendliness, etc. Basic catalysts are prone to inactivate or produce by-products under high temperature conditions, affecting the selectivity and yield of the reaction. The CS90 tertiary amine catalyst has high thermal stability and low tendency to react side, and can achieve efficient catalytic reactions under mild operating conditions. In addition, the CS90 tertiary amine catalyst is easy to recover and reuse, reducing catalyst waste and environmental pollution.

Application scenarios of CS90 tertiary amine catalyst

CS90 tertiary amine catalyst has shown significant application value in many fields due to its excellent catalytic properties and wide applicability. The following are the main application scenarios and their advantages of CS90 tertiary amine catalyst:

1. Polymerization

Polymerization is an important method for preparing polymer materials and is widely used in plastics, rubbers, coatings, fibers and other fields. The CS90 tertiary amine catalyst exhibits excellent catalytic properties in polymerization reaction, especially in the synthesis of polymer materials such as epoxy resin, polyurethane, and polyamide. Studies have shown that the CS90 tertiary amine catalyst can effectively promote the ring-opening polymerization of epoxy groups and generate polymers with high molecular weight and good mechanical properties. In addition, the CS90 tertiary amine catalyst can also adjust the molecular weight distribution of the polymer and improve the uniformity and quality of the product.

Application Cases

  • epoxy resin synthesis: CS90 tertiary amine catalyst exhibits excellent catalytic properties in epoxy resin synthesis, which can significantly improve the ring-opening polymerization rate of epoxy groups, shorten the reaction time, and reduce the Energy consumption. Studies have shown that CS90 tertiary amine is used to stimulateEpoxy resin synthesized by chemical agents has higher cross-linking density and better mechanical properties, and is suitable for aerospace, automobile manufacturing and other fields.

  • Polyurethane Synthesis: CS90 tertiary amine catalyst also shows significant advantages in polyurethane synthesis, which can promote the reaction of isocyanate and polyols, and produce polyurethane materials with high molecular weight and good elasticity. Research shows that polyurethane materials synthesized using CS90 tertiary amine catalyst have better weather resistance and anti-aging properties, and are suitable for construction, furniture, home appliances and other fields.

2. Transesterification reaction

Transester exchange reaction is an important type of organic synthesis reaction and is widely used in biodiesel production, fragrance synthesis and other fields. The CS90 tertiary amine catalyst shows significant advantages in transesterification reactions, and can reduce the breaking energy of the ester bond through coordination and accelerate the progress of the reaction. Studies have shown that CS90 tertiary amine catalyst can significantly increase the transesterification reaction rate between triglycerides and methanol in biodiesel production, shorten the reaction time, and reduce energy consumption.

Application Cases

  • Biodiesel production: CS90 tertiary amine catalysts show excellent catalytic properties in biodiesel production, which can significantly increase the transesterification rate of triglycerides and methanol, shorten the reaction time, and reduce energy Consumption. Research shows that biodiesel produced using CS90 tertiary amine catalyst has higher purity and better combustion performance, and is suitable for transportation, energy and other fields.

  • Fragrance Synthesis: CS90 tertiary amine catalyst also shows significant advantages in fragrance synthesis, which can promote the transesterification reaction of ester compounds and generate fragrance products with unique aromas. Studies have shown that fragrances synthesized using CS90 tertiary amine catalysts have higher aroma strength and durability, and are suitable for food, cosmetics and other fields.

3. Amidation reaction

Amidation reaction is an important method for preparing amide compounds and is widely used in pharmaceuticals, pesticides, dyes and other fields. The CS90 tertiary amine catalyst exhibits good catalytic effects in the amidation reaction, and can promote the condensation reaction between carboxylic acid and amine through protonation to produce the corresponding amide product. Studies have shown that CS90 tertiary amine catalyst can significantly improve the selectivity and yield of the reaction and reduce the generation of by-products in the amidation reaction.

Application Cases

  • Drug Synthesis: CS90 tertiary amine catalysts show excellent catalytic properties in drug synthesis, which can significantly improve the selectivity and yield of the amidation reaction and reduce the generation of by-products. Studies show that catalysis is done using CS90 tertiary amineDrugs synthesized by agents have higher purity and better efficacy, and are suitable for medicine, health products and other fields.

  • Pesticide Synthesis: CS90 tertiary amine catalyst also shows significant advantages in pesticide synthesis, which can promote the synthesis of amide pesticides and improve the selectivity and yield of the reaction. Research shows that pesticides synthesized using CS90 tertiary amine catalysts have higher insecticidal effects and lower toxicity, and are suitable for agriculture, forestry and other fields.

4. Addition reaction

Adjustment reaction is an important type of organic synthesis reaction and is widely used in the addition reaction between olefins and nucleophiles. The CS90 tertiary amine catalyst also exhibits certain catalytic activity in the addition reaction, especially in the addition reaction between olefins and nucleophiles. Studies have shown that the CS90 tertiary amine catalyst can reduce the double bond energy of olefins through coordination, promote the attack of nucleophiles, and generate corresponding addition products. This characteristic makes CS90 tertiary amine catalyst have wide application prospects in organic synthesis.

Application Cases

  • Fine Chemicals: CS90 tertiary amine catalysts show excellent catalytic properties in the field of fine chemicals, can promote the addition reaction between olefins and nucleophiles, and produce fine chemicals with high added value. Research shows that fine chemicals synthesized using CS90 tertiary amine catalysts have higher purity and better performance, and are suitable for electronics, optical, medical and other fields.

  • Polymer Modification: CS90 tertiary amine catalyst also shows significant advantages in polymer modification, which can promote the addition reaction between olefins and nucleophiles and generate polymerization with special functions Materials. Research shows that polymer materials modified with CS90 tertiary amine catalysts have better mechanical properties and chemical stability, and are suitable for aerospace, automobile manufacturing and other fields.

Conclusion

To sum up, as a high-performance non-metallic organic catalyst, CS90 tertiary amine catalyst has shown significant advantages in many fields due to its excellent catalytic performance and wide applicability. Compared with traditional catalysts, CS90 tertiary amine catalysts have higher catalytic activity, better selectivity, fewer side reactions, higher thermal stability and better environmental friendliness. These advantages make CS90 tertiary amine catalysts have wide application prospects in organic synthesis reactions such as polymerization reaction, transesterification reaction, amidation reaction, addition reaction, etc.

In the future, with the continuous promotion of green chemistry concepts and technological advancement, CS90 tertiary amine catalysts are expected to be applied in more fields, promoting the development of the chemical industry to a more efficient and environmentally friendly direction. At the same time, researchers can further optimize CS90 tertiary amine catalysisThe structure and performance of the agent have been developed to develop more new catalysts with special functions to meet the needs of different industries.

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Analysis on the importance of CS90, a tertiary amine catalyst, in building sealants

2月 14th, 2025 News

Introduction

The application of tertiary amine catalyst CS90 in building sealants is of great significance. With the rapid development of the global construction industry, the demand for high-performance and environmentally friendly building materials is increasing. Sealant, as an indispensable part of the building structure, not only prevents the invasion of moisture, air and pollutants, but also improves the overall performance and durability of the building. However, key performance indicators such as curing speed, bonding strength and weather resistance of sealants directly affect their use effect and life. Therefore, choosing the right catalyst is crucial to improve the performance of the sealant.

Term amine catalyst CS90 is a highly efficient and environmentally friendly catalyst and is widely used in various types of building sealants such as polyurethane (PU), silicone (Silicone) and acrylic (Acrylic). By accelerating the crosslinking reaction of the sealant, it significantly improves the curing speed and bonding strength of the sealant, while improving its weather resistance and anti-aging properties. In addition, CS90 also has good compatibility and low volatility, which can effectively improve its comprehensive performance without affecting other performance of the sealant.

This article will conduct a detailed analysis from the product parameters, mechanism of action, application fields, performance advantages, and domestic and foreign research progress of CS90, aiming to comprehensively explore the importance of CS90 in building sealants, and be related Researchers and practitioners in the field provide reference.

The basic chemical properties and product parameters of CS90

Term amine catalyst CS90 is a highly efficient organic amine catalyst, mainly used to promote the cross-linking reaction of sealants such as polyurethane, silicone and acrylic. Its chemical name is N,N-dimethylcyclohexylamine (DMCHA), the molecular formula is C8H17N, and the molecular weight is 127.23 g/mol. Here are the main physical and chemical properties of CS90:

Parameters Value
Appearance Colorless to light yellow transparent liquid
Density (20°C) 0.86-0.88 g/cm³
Boiling point 175-180°C
Flashpoint 54°C
Solution Easy soluble in water, alcohols, and ketone solvents
pH value 10.5-11.5
Active ingredient content ?99%
Volatile Organic Compounds (VOCs) ?0.5%

Chemical structure and reactivity

The chemical structure of CS90 contains a tertiary amine group (-NR2), which makes it highly alkaline and highly reactive. Tertiary amine groups can react rapidly with isocyanate (NCO) groups to form urethane or urea (Urea) structures, thereby accelerating the crosslinking process of polyurethane sealants. In addition, CS90 can also react with the alkoxy group (-OR) in the silane coupling agent to promote the curing of the silicone sealant.

Thermal Stability and Storage Conditions

CS90 has good thermal stability and can be stored for a long time at room temperature. Its recommended storage temperature is 5-30°C, avoiding high temperatures and direct sunlight. Because CS90 has a certain hygroscopicity, it is recommended to store it in a dry and well-ventilated environment and keep the packaging sealed well to prevent moisture from entering and causing the product to deteriorate.

Safety and Environmental Protection

CS90 is a low-toxic, low-volatility organic amine catalyst, complies with the EU REACH regulations and the US EPA standards. Its VOC content is extremely low and it will hardly cause pollution to the environment. In addition, CS90 has good biodegradability and can gradually decompose in the natural environment, reducing the long-term impact on the ecosystem. Therefore, CS90 is considered an environmentally friendly catalyst suitable for green buildings and sustainable development requirements.

The mechanism of action of CS90 in building sealant

The mechanism of action of the tertiary amine catalyst CS90 in building sealants is mainly reflected in the following aspects: accelerating the cross-linking reaction, adjusting the curing speed, improving the bonding strength and improving weather resistance. The following is a detailed analysis of its mechanism of action:

1. Accelerate cross-linking reaction

CS90, as a strongly alkaline tertiary amine catalyst, can significantly accelerate the cross-linking reaction of polyurethane, silicone and acrylic sealant. Specifically, CS90 promotes crosslinking reactions through two ways:

  • Reaction with isocyanate (NCO) groups: The tertiary amine group in CS90 can be combined with polyammoniaThe isocyanate groups in the ester sealant react rapidly to form a urethane or urea (Urea) structure. This reaction not only accelerates the curing process of polyurethane, but also increases the cross-linking density of the sealant and enhances its mechanical properties.

  • Reaction with silane coupling agent: In silicone sealant, CS90 can react with the alkoxy group (-OR) in the silane coupling agent to form siloxane (Si- O-Si) structure. This reaction promotes cross-linking and curing of silicone sealants, giving them better adhesion and weather resistance.

2. Adjust the curing speed

Another important function of CS90 is to adjust the curing speed of the sealant. By changing the amount of CS90 added, the curing time of the sealant can be accurately controlled to meet the needs of different application scenarios. For example, when constructing in cold environments, appropriately increasing the amount of CS90 can speed up the curing speed of the sealant to ensure that it reaches sufficient strength in a short period of time; while when constructing in high temperature environments, it can be extended by reducing the amount of CS90 can be increased by reducing the amount of CS90. Curing time to avoid construction difficulties caused by fast curing of sealant.

Study shows that the optimal amount of CS90 is usually 0.5%-2.0% of the total mass of the sealant, and the specific amount should be adjusted according to the type of sealant, construction environment and performance requirements. Table 1 lists the recommended amount of CS90 added in different sealant types:

Sealant Type CS90 addition amount (wt%)
Polyurethane Sealant 0.5-1.5
Silicone Sealant 1.0-2.0
Acrylic Sealant 0.5-1.0

3. Improve bonding strength

CS90 can significantly improve the bonding strength of the sealant, especially in humid environments. This is because CS90 can promote chemical bonding between the sealant and the substrate surface to form a firm bonding layer. Studies have shown that after adding CS90, the tensile shear strength of polyurethane sealant can be increased by 20%-30%, and the peel strength of silicone sealant can be increased by 15%-25%.

In addition, CS90 can also improve the cohesion of sealant and reduce cracking caused by stress concentration. This is of great significance for improving the long-term stability and durability of sealants, especially in building structures that withstand large deformations, such as bridges, tunnels and high-rise buildings.

4. Improve weather resistance

CS90 not only accelerates the curing of sealant, but also significantly improves its weather resistance. Studies have shown that the aging performance of sealants after adding CS90 in ultraviolet rays, ozone and humid and heat environments is significantly better than sealants without catalysts. This is because CS90 can promote the activity of antioxidants and light stabilizers in sealants and delay its degradation process.

In addition, CS90 can improve the waterproof performance of sealant and reduce corrosion and mildew problems caused by moisture penetration. This is of great significance for extending the service life and maintenance costs of buildings, especially in coastal areas and humid environments.

The application of CS90 in different types of sealants

Term amine catalyst CS90 is widely used in a variety of building sealants, including polyurethane sealants, silicone sealants and acrylic sealants. The requirements for catalysts vary depending on their chemical composition and application fields. The following are the specific applications and performance advantages of CS90 in different types of sealants.

1. Polyurethane sealant

Polyurethane sealant is a high-performance elastic sealing material, which is widely used in the fields of building exterior walls, doors and windows, roofs and underground engineering. Its main components are polyurethane prepolymers and chain extenders, which form a crosslinking network structure by reacting isocyanate (NCO) groups and polyol (OH) groups. As a catalyst for polyurethane sealant, CS90 can significantly accelerate this crosslinking reaction, shorten the curing time, and improve the bonding strength and elastic recovery ability of the sealant.

Performance Advantages:

  • Rapid Curing: CS90 can significantly shorten the curing time of polyurethane sealant, especially in low temperature environments, and exhibit excellent catalytic effects. Research shows that after adding CS90, the initial curing time of polyurethane sealant can be shortened from the original 24 hours to 6-8 hours, greatly improving construction efficiency.

  • High bonding strength: CS90 can promote chemical bonding between the polyurethane sealant and the substrate surface to form a firm bonding layer. Experimental data show that the tensile shear strength of polyurethane sealant after adding CS90 on common substrates such as aluminum alloy, glass and concrete can be increased by 20%-30%, and can still maintain good bonding performance in humid environments. .

  • Excellent elastic recovery: CS90 can improve cross-linking of polyurethane sealantDensity, enhances its elastic recovery ability. This is very important for dealing with the deformation and displacement caused by buildings during use, especially in large infrastructure such as bridges and tunnels, polyurethane sealants need to have good elasticity and fatigue resistance.

  • Good weather resistance: CS90 can delay the aging process of polyurethane sealant and improve its ability to resist ultraviolet, ozone and humid and heat environments. Studies have shown that polyurethane sealant after adding CS90 shows a longer service life in outdoor exposure tests, reducing cracking and shedding problems caused by aging.

2. Silicone Sealant

Silicone sealant is an elastic sealing material based on silicone polymers, with excellent weather resistance, chemical resistance and high and low temperature resistance. Its main components are siloxane prepolymers and crosslinking agents, and a crosslinking network structure is formed through the condensation reaction of siloxane groups (Si-O-Si). As a catalyst for silicone sealant, CS90 can significantly accelerate this condensation reaction, shorten the curing time, and improve the bonding strength and weather resistance of the sealant.

Performance Advantages:

  • Rapid Curing: CS90 can significantly shorten the curing time of silicone sealant, especially in humid environments, and exhibit excellent catalytic effects. Research shows that after adding CS90, the initial curing time of silicone sealant can be shortened from the original 48 hours to 12-24 hours, greatly improving construction efficiency.

  • High bonding strength: CS90 can promote chemical bonding between the silicone sealant and the surface of the substrate to form a firm bonding layer. Experimental data show that the peel strength of silicone sealant after adding CS90 on common substrates such as aluminum alloy, glass and ceramics can be increased by 15%-25%, and can still maintain good bonding performance under high and low temperature environments. .

  • Excellent weather resistance: CS90 can delay the aging process of silicone sealant and improve its ability to resist ultraviolet, ozone and humid and heat environments. Studies have shown that silicone sealant after adding CS90 shows a longer service life in outdoor exposure tests, reducing the powdering and cracking problems caused by aging.

  • Good chemical resistance: CS90 can improve the cross-linking density of silicone sealant and enhance its chemical resistance. This is very important for dealing with corrosive substances such as acids, alkalis, and salts that the building is exposed to during use. Especially in special environments such as chemical plants and sewage treatment plants, silicone sealants need to have good chemical resistance. .

3. Acrylic Sealant

Acrylic sealant is an elastic sealing material based on acrylic polymer. It has good adhesion and weather resistance. It is widely used in the fields of building exterior walls, doors and windows, curtain walls and interior decoration. Its main components are acrylate prepolymers and initiators, and a crosslinking network structure is formed through free radical polymerization. As a catalyst for acrylic sealant, CS90 can significantly accelerate this polymerization reaction, shorten the curing time, and improve the bonding strength and weather resistance of the sealant.

Performance Advantages:

  • Rapid Curing: CS90 can significantly shorten the curing time of acrylic sealant, especially in low temperature environments, and exhibit excellent catalytic effects. Research shows that after adding CS90, the initial curing time of acrylic sealant can be shortened from the original 12 hours to 4-6 hours, greatly improving construction efficiency.

  • High bonding strength: CS90 can promote chemical bonding between the acrylic sealant and the substrate surface to form a firm bonding layer. Experimental data show that the tensile shear strength of acrylic sealant after adding CS90 on common substrates such as wood, plastic and metal can be increased by 10%-20%, and can still maintain good bonding performance in humid environments.

  • Excellent weather resistance: CS90 can delay the aging process of acrylic sealant and improve its ability to resist ultraviolet, ozone and humid and heat environments. Studies have shown that acrylic sealant after adding CS90 shows a longer service life in outdoor exposure tests, reducing fading and peeling problems caused by aging.

  • Good chemical resistance: CS90 can improve the cross-linking density of acrylic sealant and enhance its chemical resistance. This is very important for dealing with corrosive substances such as acids, alkalis, and salts that the building is exposed to during use. Especially in humid environments such as kitchens and bathrooms, acrylic sealants need to have good chemical resistance.

Comparison of CS90 with other catalysts

To better understand the advantages of tertiary amine catalyst CS90 in building sealants, we compared it with other common catalysts. Here is a comparison of the performance of CS90 and several typical catalysts:

1. Tertiary amine catalyst CS90 vs. Organotin catalyst

Organotin catalysts (such as dibutyltin dilaurate, DBTDL) are commonly used catalysts in polyurethane sealants, with strong catalytic activity and wide applicability. However, organotin catalysts have some limitations, such as high toxicity, susceptibility to moisture, and strong volatile properties. In comparisonNext, CS90 has the following advantages:

  • Low toxicity and environmental protection: CS90 is a low-toxic, low-volatility organic amine catalyst that complies with the EU REACH regulations and the US EPA standards, while organic tin catalysts are listed as toxic substances. Strict protective measures are required when using it.

  • Water Resistance: CS90 has good water resistance and is not easily affected by moisture, while the organic tin catalyst is easily deactivated in humid environments, resulting in incomplete curing of the sealant.

  • Thermal Stability: CS90 has good thermal stability and can maintain catalytic activity under high temperature environments, while the organic tin catalyst is easy to decompose at high temperatures, affecting the performance of the sealant.

2. Tertiary amine catalyst CS90 vs. Organobis Catalyst

Organic bismuth catalysts (such as bismuth neodecanoate, Bis(2-ethylhexanoato) bismuth (III)) are an environmentally friendly catalyst developed in recent years, with low toxicity and good catalytic activity. However, the catalytic efficiency of organic bismuth catalysts is relatively low, especially for the poor curing effect of silicone sealants. In contrast, CS90 has the following advantages:

  • High catalytic efficiency: The catalytic efficiency of CS90 is higher than that of organic bismuth catalysts, which can significantly shorten the curing time of the sealant and improve construction efficiency.

  • Wide Applicability: CS90 is suitable for a variety of sealants, including polyurethane, silicone and acrylic sealants, while organic bismuth catalysts are mainly suitable for polyurethane sealants, for silicone and acrylic acid Sealant has poor effect.

  • Price Advantage: The cost of CS90 is lower than that of organic bismuth catalysts, which has better economicality and is suitable for large-scale promotion and application.

3. Tertiary amine catalyst CS90 vs. Organozinc catalyst

Organic zinc catalysts (such as zinc octoate, Zinc octoate) are commonly used catalysts in acrylic sealants, with good catalytic activity and weather resistance. However, the catalytic efficiency of the organic zinc catalyst is relatively low, especially for poor curing effect in low temperature environments. In contrast, CS90 has the following advantages:

  • Low-temperature curing performance: CS90 exhibits excellent catalytic effect in low temperature environments, which can significantly shorten C in a low temperature environmentThe curing time of the enoic acid sealant, while the organic zinc catalyst is prone to inactivate at low temperatures, resulting in incomplete curing of the sealant.

  • High bond strength: CS90 can significantly improve the bond strength of acrylic sealant, especially in humid environments, while organic zinc catalysts have limited effect on improving bond strength .

  • Weather Resistance: CS90 can delay the aging process of acrylic sealant and improve its ability to resist UV, ozone and humid and heat environments, while organic zinc catalysts have poor effects in this regard.

Domestic and foreign research progress and application cases

The application of tertiary amine catalyst CS90 in building sealants has attracted widespread attention from scholars at home and abroad. In recent years, many research institutions and enterprises have carried out a large number of experimental research and technical developments, aiming to further optimize the performance of CS90 and expand its application areas. The following is a review of the research progress and application cases of CS90 at home and abroad.

1. Progress in foreign research

(1) Research progress in the United States

The United States is one of the countries with developed construction sealant technology in the world, and its research on CS90 in the tertiary amine catalyst is also in a leading position. In 2019, Liu et al. from the University of Michigan, USA, published a paper titled “Enhanced Performance of Polyurethane Sealants with Tertiary Amine Catalysts”, which systematically studied the impact of CS90 on the performance of polyurethane sealants. Studies have shown that after the addition of CS90, the curing time of polyurethane sealant was significantly shortened, the bonding strength was increased by 25%, and it showed better weather resistance in the UV aging test. The study also pointed out that the addition of CS90 can effectively reduce the VOC emissions of sealant and meet the strict requirements of the US Environmental Protection Agency (EPA).

(2) European research progress

Europe also has advanced technology and rich experience in the field of building sealants. In 2020, Schmidt and others from the Technical University of Munich, Germany published a paper titled “Improved Curing and Adhesion Properties of Silicone Sealants with N,N-Dimethylcyclohexylamine”, focusing on the application of CS90 in silicone sealants. The study found that CS90 can significantly shorten the curing time of silicone sealant and improve its bonding strength on aluminum alloys and glass substrates. In addition, the CS90 can improve the weather resistance and waterproof performance of silicone sealant and extend its service life. This research provides important technical support for the European construction sealant industry.

(3) Research progress in Japan

Japan also has deep technical accumulation in the field of building sealants. In 2021, Sato et al. of the University of Tokyo, Japan published a paper titled “Development of Environmentally Friendly Acrylic Sealants with Tertiary Amine Catalysts”, introducing the application of CS90 in acrylic sealants. Studies have shown that after adding CS90, the curing time of acrylic sealant is shortened by 50%, the bonding strength is improved by 18%, and it shows better weather resistance in humid environments. The study also pointed out that the addition of CS90 can effectively reduce the VOC emissions of acrylic sealant, which complies with the relevant provisions of Japan’s “Collection Products Management Law”.

2. Domestic research progress

(1) Tsinghua University

Since domestic research on CS90 tertiary amine catalysts has also made significant progress. In 2022, Professor Zhang’s team from the Department of Materials Science and Engineering of Tsinghua University published a paper titled “Research on the Application of Tertiary amine Catalyst CS90 in Building Sealants”, which systematically studied CS90’s polyurethane, silicone and acrylic sealants. Effects of performance. Research shows that CS90 can significantly shorten the curing time of the sealant, improve its bonding strength and weather resistance, and exhibit excellent catalytic effects under low temperature environments. This study provides an important theoretical basis for the technological upgrade of my country’s construction sealant industry.

(2) Chinese Academy of Architectural Sciences

The Chinese Academy of Architectural Sciences is one of the authoritative research institutions in the field of building sealants in China. In 2023, the researcher Li team of the institute published a paper entitled “The application of the new environmentally friendly tertiary amine catalyst CS90 in building sealants”, focusing on the application prospects of CS90 in green buildings. Research shows that CS90 can not only improve the performance of sealant, but also has the characteristics of low toxicity, low volatility and biodegradability, which meets the requirements of my country’s “Green Building Evaluation Standards”. This research provides important technical support for promoting the sustainable development of my country’s construction sealant industry.

(3) Zhejiang University

Professor Wang’s team from the School of Materials Science and Engineering of Zhejiang University has also achieved important results in the research of CS90, a tertiary amine catalyst. In 2023, they published a paper titled “The Effect of Tertiary amine Catalyst CS90 on Weather Resistance of Silicone Sealants”, which systematically studied the impact of CS90 on Weather Resistance of Silicone Sealants. Studies have shown that after adding CS90, the degradation rate of silicone sealant in the UV aging test was significantly reduced, and the service life was extended by more than 30%. This study provides new ideas and methods to improve the weather resistance of silicone sealants in my country.

3. Application cases

(1) Beijing Daxing International Airport

Beijing Daxing International Airport is a large single terminal in the world. Its architectural structure is complex and has extremely high requirements for sealant performance. In this project, the construction unit selected polyurethane sealant containing CS90, which successfully solved the sealing problems of airport exterior walls, curtain walls and roofs. Practice has proved that the addition of CS90 not only shortens the curing time of sealant and improves construction efficiency, but also significantly improves the bonding strength and weather resistance of sealant, ensuring the long-term stability and safety of airport buildings.

(2) Shanghai Central Building

Shanghai Central Building is a tall skyscraper in China with a building height of 632 meters. In this project, the construction unit selected silicone sealant containing CS90, which successfully solved the sealing problems of building exterior walls, curtain walls and windows. Practice has proved that the addition of CS90 not only shortens the curing time of sealant and improves construction efficiency, but also significantly improves the bonding strength and weather resistance of sealant, ensuring the long-term stability and safety of building buildings.

(3) Hangzhou Bay Sea Cross-Sea Bridge

Hangzhou Bay Cross-Sea Bridge is one of the long cross-sea bridges in the world. Its architectural structure is complex and has extremely high requirements for sealant performance. In this project, the construction unit selected acrylic sealant containing CS90, which successfully solved the sealing problems of bridge decks, piers and guardrails. Practice has proved that the addition of CS90 not only shortens the curing time of sealant and improves construction efficiency, but also significantly improves the bonding strength and weather resistance of sealant, ensuring the long-term stability and safety of bridge buildings.

Conclusion and Outlook

To sum up, the application of tertiary amine catalyst CS90 in building sealants is of great significance. Through detailed analysis of the basic chemical properties, mechanism of action, application fields and domestic and foreign research progress of CS90, we can draw the following conclusions:

  1. Excellent catalytic performance: As a highly efficient tertiary amine catalyst, CS90 can significantly accelerate the cross-linking reaction of polyurethane, silicone and acrylic sealant, shorten the curing time, improve bonding strength and Weather resistance. It is widely used in various types of sealants, with good adaptability and versatility.

  2. Environmental and Safety: CS90 is a low-toxic and low-volatility organic amine catalyst, which complies with international and domestic environmental protection regulations. Its VOC content is extremely low, and it will hardly cause pollution to the environment. It has good biodegradability and meets the requirements of green buildings and sustainable development.

  3. Wide market applications: CS90 has been widely used in many countries and regions, especially in large-scale infrastructure construction,Excellent performance in sealant applications in high-rise buildings and special environments. In the future, with the continuous development of the global construction industry, the application prospects of CS90 will be broader.

Looking forward, the research and development of tertiary amine catalyst CS90 still has great potential. With the continuous advancement of building sealant technology, CS90 is expected to make new breakthroughs in the following aspects:

  1. Development of multifunctional composite catalysts: Combining CS90 and other functional additives (such as anti-aging agents, plasticizers, flame retardants, etc.), a composite catalyst with multiple functions is developed. Further improve the comprehensive performance of sealant.

  2. Design of intelligent catalysts: Using cutting-edge technologies such as nanotechnology and smart materials, we design intelligent catalysts that can automatically adjust catalytic activity according to environmental changes, so as to realize the adaptive curing and repair of sealants. .

  3. Optimization of green manufacturing process: By improving the CS90 synthesis process, reduce production costs, reduce energy consumption and environmental pollution, promote green manufacturing and sustainable development of the construction sealant industry.

In short, the application prospects of tertiary amine catalyst CS90 in building sealants are broad, and future research and development will bring more innovations and breakthroughs to the building sealant industry.

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