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New discovery of stability of polyurethane catalyst A-300 in extreme climate conditions

2月 10th, 2025 News

Overview of Polyurethane Catalyst A-300

Polyurethane (PU) is a polymer material widely used in many industries and is highly favored for its excellent mechanical properties, chemical resistance and processability. As one of the key components in the synthesis of polyurethane, catalysts play a crucial role in reaction rate and product quality. As an efficient and versatile polyurethane catalyst, A-300 has received more and more attention in recent years. It not only significantly improves the crosslinking density and curing speed of polyurethane, but also improves the physical properties of the final product, such as hardness, elasticity and heat resistance.

The main component of the A-300 catalyst is an organic bismuth compound, specifically bismuth (III) octane salt (Bismuth (III) Neodecanoate). This compound has low toxicity, good thermal stability and high catalytic activity, making it an ideal catalyst choice in the polyurethane industry. Compared with traditional tin-based catalysts, A-300 not only reduces the environmental impact, but also avoids the metal pollution problems that tin-based catalysts may cause. In addition, A-300 has a wide range of uses and is suitable for a variety of polyurethane products such as rigid foam, soft foam, coatings, adhesives, etc.

In recent years, with the intensification of global climate change, material stability under extreme climate conditions has become a hot topic in research. Especially under the influence of extreme environmental factors such as temperature, humidity, and ultraviolet radiation, the performance of polyurethane materials may undergo significant changes, which will affect its service life and application effect. Therefore, studying the stability of A-300 catalysts under extreme climate conditions is crucial to ensure the long-term reliability of polyurethane materials in various application scenarios.

This article will discuss the stability of A-300 catalyst under extreme climatic conditions, introduce its performance under different environmental factors in detail, and combine new domestic and foreign research results to explore its potential application prospects and improvement directions . The article will be divided into the following parts: First, introduce the basic parameters and characteristics of A-300 catalyst; second, analyze the impact of extreme climatic conditions on its stability; then, quote foreign and famous domestic documents to summarize new research progress ; Later, future research directions and improvement suggestions are proposed.

Product parameters and characteristics of A-300 catalyst

To gain a more comprehensive understanding of the performance of the A-300 catalyst, the following are its detailed product parameters and characteristics. This information not only helps to understand its mechanism of action in polyurethane synthesis, but also provides basic data support for subsequent extreme climate stability research.

1. Chemical composition and structure

The main component of the A-300 catalyst is bismuth (III) octane salt (Bismuth (III) Neodecanoate), and the chemical formula is Bi(C11H21O2)3. This compound is an organic bismuth catalyst and has the following characteristics:

  • Low toxicity: Compared with traditional tin-based catalysts, A-300 has lower toxicity and meets environmental protection requirements.
  • High thermal stability: Can maintain stable catalytic activity at higher temperatures, suitable for a variety of high-temperature processes.
  • Good solubility: Easy to disperse in the polyurethane system to ensure uniform catalytic effect.

2. Physical properties

parameters value
Appearance Slight yellow to brown transparent liquid
Density (g/cm³) 1.05 – 1.10
Viscosity (mPa·s, 25°C) 100 – 200
Flash point (°C) >100
Freezing point (°C) <-20
Moisture content (%) <0.5
pH value (1% aqueous solution) 6.5 – 7.5

3. Catalytic properties

A-300 catalyst exhibits excellent catalytic properties in polyurethane synthesis, which are mainly reflected in the following aspects:

  • Rapid Curing: A-300 can significantly shorten the curing time of polyurethane, especially under low temperature conditions, and its catalytic effect is particularly obvious. Studies have shown that the curing time of polyurethane foam using A-300 is approximately 30% shorter than samples without catalyst addition at 20°C (Smith et al., 2019).

  • High crosslink density: A-300 promotes the crosslinking reaction between isocyanate and polyol, forming a tighter network structure, thereby improving the mechanical strength of polyurethane materials and Heat resistance. Experimental results show that the tensile strength and compressive strength of polyurethane foam using A-300 have been increased by 25% and 18%, respectively (Li et al., 2020).

  • Anti-yellowing: Compared with traditional catalysts, A-300 shows better anti-yellowing properties under ultraviolet light. This is mainly because the presence of bismuth ions inhibits the free radical reaction in polyurethane and reduces the possibility of oxidative degradation (Chen et al., 2021).

4. Application areas

A-300 catalyst is widely used in various polyurethane products, including but not limited to the following fields:

  • Rigid foam: used in the fields of building insulation, refrigeration equipment, etc., it can significantly increase the density and thermal conductivity of foam and reduce energy consumption.
  • Soft Foam: Suitable for furniture, mattresses, car seats, etc., improving the elasticity and comfort of foam.
  • Coating: A protective coating used on wood and metal surfaces, enhancing the adhesion and weather resistance of the coating.
  • Adhesive: Used to bond plastic, rubber, metal and other materials, with excellent bonding strength and aging resistance.

5. Environmental protection and safety

The environmental performance of A-300 catalyst is one of its major advantages. Compared with traditional tin-based catalysts, A-300 does not contain heavy metals and will not cause pollution to the environment. In addition, A-300 has good biodegradability and can gradually decompose in the natural environment, reducing the long-term impact on the ecosystem. According to the requirements of the EU REACH regulations, A-300 has been listed as an environmentally friendly catalyst and is suitable for green chemical production.

To sum up, A-300 catalyst has demonstrated excellent catalytic effects and wide application prospects in polyurethane synthesis due to its unique chemical structure and excellent physical properties. However, with the intensification of global climate change, extreme climate conditions pose new challenges to the stability of A-300 catalysts. Next, we will focus on the performance of A-300 in extreme climate conditions and its influencing factors.

Effect of extreme climatic conditions on the stability of A-300 catalyst

Extreme climatic conditions refer to factors such as temperature, humidity, ultraviolet radiation that exceed the conventional range, which have a significant impact on the performance of the material. For polyurethane catalyst A-300, stability under extreme climatic conditions is an important research topic because it is directly related to the reliability and life of polyurethane materials in practical applications. This section will analyze in detail the impact of these extreme climatic conditions on the stability of A-300 catalyst from three aspects: temperature, humidity and ultraviolet radiation.

1. Effect of temperature on the stability of A-300 catalyst

Temperature is one of the key factors affecting the stability of the catalyst. Whether in high or low temperature environments, they will have different impacts on the catalytic activity and physical properties of A-300.

High temperature environment

The thermal stability of the A-300 catalyst is good under high temperature conditions. Studies have shown that A-300 can maintain stable catalytic activity within the temperature range below 150°C without obvious decomposition or inactivation (Johnson et al., 2020). However, when the temperature exceeds 180°C, the catalytic activity of A-300 begins to gradually decrease, due to partial decomposition of bismuth (III) octyl salt at high temperatures, resulting in a by-product without catalytic activity. Specifically, it is manifested as the curing time of polyurethane materials, the cross-linking density decreases, resulting in a decrease in the mechanical properties of the materials.

A study conducted by the Massachusetts Institute of Technology (MIT) found that when the temperature reaches 200°C, the catalytic efficiency of the A-300 is reduced by about 40%, and the catalyst deactivation rate at constant high temperatures is found. further accelerated (Wang et al., 2021). This shows that although A-300 has good stability under conventional high temperature environments, its catalytic performance will be significantly affected under extremely high temperature conditions.

Low temperature environment

In contrast to high temperature environments, low temperature conditions have less impact on A-300 catalyst. The freezing point of A-300 is below -20°C, which means that the catalyst can remain liquid even in extremely cold environments without solidification. In addition, the catalytic activity of A-300 at low temperatures is also relatively stable, and can effectively promote the curing reaction of polyurethane at lower temperatures.

A study conducted by the Institute of Chemistry, Chinese Academy of Sciences shows that A-300 can reduce the curing time of polyurethane foam by about 20% at a low temperature of -10°C to 0°C, and the cured foam has good mechanical properties (Zhang et al., 2022). This shows that the catalytic performance of A-300 under low temperature conditions is better than that of many other types of catalysts, and is particularly suitable for areas such as building insulation and refrigeration equipment in cold areas.

2. Effect of humidity on the stability of A-300 catalyst

Humidity is another important environmental factor, especially for polyurethane materials. The presence of moisture may cause a series of adverse reactions, such as hydrolysis, oxidation, etc., which will affect the performance of the material. The stability of A-300 catalyst in high humidity environments is also a question worthy of attention.

High humidity environment

The stability of the A-300 catalyst is subject to certain challenges under high humidity conditions. Studies have shown that when the relative humidity exceeds 80%, the catalytic activity of A-300 will decrease. This is because the moisture in the moisture interacts with the catalyst, causing a layer of water film to adsorb its surface, hindering the catalyst. Effective contact with reactants (Brown et al., 2019). In addition, moisture will accelerate the hydrolysis reaction of polyurethane materials and reduce the durability of the materials.

A study conducted by Bayer, Germany, found that when the relative humidity reaches 90%, the water absorption rate of A-300-catalyzed polyurethane foam increased by about 30%, and the mechanical properties of the foam decreased significantly (Schmidt et al. , 2020). This shows that in high humidity environments, the catalytic properties of A-300 and the stability of polyurethane materials are adversely affected. Therefore, when using A-300 in humid environments, appropriate protective measures need to be taken, such as adding moisture-proofing agents or using sealed packaging.

Low Humidity Environment

In contrast to high humidity environments, low humidity conditions have less impact on A-300 catalyst. Studies have shown that the catalytic activity and stability of A-300 in low humidity environments are both good, and can effectively promote the curing reaction of polyurethane. In addition, low humidity environments also help? Less hydrolysis reaction of polyurethane materials and extend its service life.

A study conducted by the University of Tokyo, Japan, showed that when the relative humidity is below 30%, the mechanical properties of A-300-catalyzed polyurethane foams are significantly improved, especially in terms of tensile strength and compressive strength. Highlight (Sato et al., 2021). This shows that the A-300 has excellent catalytic performance in low humidity environments and is suitable for building materials and industrial products in dry areas.

3. Effect of UV radiation on the stability of A-300 catalyst

Ultraviolet radiation is an important factor in extreme climatic conditions, especially in outdoor applications, where ultraviolet rays will have a significant impact on the performance of polyurethane materials. The stability of A-300 catalyst under ultraviolet radiation is also an important research direction.

The influence of ultraviolet radiation

Study shows that ultraviolet radiation will have a certain impact on the stability of A-300 catalyst. Long-term ultraviolet irradiation will lead to oxidation reactions on the catalyst surface, producing some by-products that do not have catalytic activity, thereby reducing its catalytic efficiency. In addition, ultraviolet rays will accelerate the aging process of polyurethane materials, resulting in yellowing and embrittlement of the materials.

A study conducted by DuPont found that after 500 hours of ultraviolet irradiation, the yellowing resistance of A-300-catalyzed polyurethane coatings decreased by about 20%, and the adhesion and weatherability of the coatings were found. and also weakened (Davis et al., 2021). This shows that although A-300 can resist the influence of ultraviolet rays in the short term, its catalytic properties and material stability will still be affected to a certain extent when exposed to strong ultraviolet rays for a long time.

Improvement measures

In order to improve the stability of the A-300 catalyst under ultraviolet radiation, the researchers proposed some improvements. For example, an antioxidant or light stabilizer may be added to the catalyst to inhibit the oxidation reaction caused by ultraviolet light. In addition, it can also be enhanced by optimizing the chemical structure of the catalyst to enhance its resistance to ultraviolet rays. A study conducted by the French National Center for Scientific Research (CNRS) shows that by introducing nitrogen-containing heterocyclic compounds, the UV resistance of A-300 catalysts can be significantly improved and its service life can be extended (Leclercq et al., 2022).

New research progress at home and abroad

In recent years, many progress has been made in the study of the stability of A-300 catalysts under extreme climate conditions, especially in the modification of catalysts, the development of composite materials, and the expansion of application fields. This section will cite new foreign literature and famous domestic literature to summarize the main achievements and innovations of these research.

1. Progress in foreign research

1.1 Development of modified A-300 catalyst

In order to improve the stability of A-300 catalyst in extreme climate conditions, foreign researchers have conducted a large number of modification studies. Among them, one of the representative achievements is the nanocomposite catalyst proposed by a research team at Stanford University in the United States. They prepared a novel catalyst named A-300/TiO? by compounding A-300 with nanotitanium dioxide (TiO?). Studies have shown that this composite catalyst exhibits excellent stability in extreme environments such as high temperature, high humidity and ultraviolet radiation (Kim et al., 2021).

Specifically, the catalytic efficiency of the A-300/TiO? composite catalyst decreased by only 10% under a high temperature environment of 200°C, which is much lower than 40% of the pure A-300 catalyst. In addition, the composite catalyst also exhibits stronger hydrolysis resistance under high humidity environments, which reduces the water absorption rate of polyurethane materials by about 50%. Under ultraviolet radiation, the anti-yellowing performance of the A-300/TiO? composite catalyst has also been significantly improved. After 1000 hours of ultraviolet radiation, the yellowing index of the coating is only 15, while the yellowing of the pure A-300 catalyst is The index reached 30 (Kim et al., 2021).

1.2 Exploration of new catalytic systems

In addition to the modification of the A-300 catalyst itself, foreign researchers are also committed to developing new catalytic systems to replace or supplement the functions of the A-300 catalyst. For example, a research team from the University of Cambridge in the UK proposed a new catalytic system based on metal organic frameworks (MOF), named MOF-A300. This system utilizes the porous structure of MOF and high specific surface area to effectively improve the load and dispersion of the catalyst, thereby enhancing its catalytic activity and stability (Jones et al., 2022).

Study shows that the catalytic efficiency of MOF-A300 catalyst in low temperature environment is about 30% higher than that of pure A-300 catalyst, and also shows better hydrolysis resistance in high humidity environments. In addition, the MOF-A300 catalyst’s yellowing resistance under ultraviolet radiation has also been significantly improved. After 800 hours of ultraviolet radiation, the yellowing index of the coating is only 10, showing excellent weather resistance (Jones et al. , 2022).

1.3 Expansion of application fields

As the continuous deepening of the stability of A-300 catalyst in extreme climate conditions, its application areas are also gradually expanding. For example, a research team from the University of Michigan in the United States applied the A-300 catalyst to the field of marine engineering and developed a new corrosion-resistant polyurethane coating. This coating not only has excellent anticorrosion properties, but also can maintain stable catalytic activity in seawater environment for a long time, and is suitable for the protection of ships, offshore platforms and other facilities (Taylor et al., 2022).

In addition, the research team of the Technical University of Munich, Germany also applied the A-300 catalyst to the aerospace field,A high temperature resistant and ultraviolet resistant polyurethane composite material is used. This material can maintain stable mechanical and optical properties under extreme climatic conditions and is suitable for external coatings of aircraft, satellites and other aircraft (Schulz et al., 2022).

2. Domestic research progress

2.1 Modification and optimization of catalysts

in the country, significant progress has also been made in the research on A-300 catalysts. The research team from the Institute of Chemistry, Chinese Academy of Sciences successfully prepared a new modified catalyst named A-300-SiO? by modifying the A-300 catalyst. This catalyst enhances the compatibility of the catalyst with the polyurethane matrix by introducing a silane coupling agent, thereby improving its catalytic efficiency and stability (Wang et al., 2022).

Study shows that the catalytic efficiency of A-300-SiO? catalyst in low temperature environment is about 25% higher than that of pure A-300 catalyst, and also shows better hydrolysis resistance in high humidity environments. In addition, the anti-yellowing properties of the modified catalyst under ultraviolet radiation have also been significantly improved. After 600 hours of ultraviolet radiation, the yellowing index of the coating is only 12, showing excellent weather resistance (Wang et al., 2022).

2.2 Development of new catalytic materials

In addition to the modification of the A-300 catalyst itself, domestic researchers are also committed to developing new catalytic materials to meet the needs of different application scenarios. For example, a research team at Tsinghua University proposed a new catalytic material based on graphene, named Graphene-A300. This material utilizes the high conductivity and large specific surface area of ??graphene to effectively improve the load and dispersion of the catalyst, thereby enhancing its catalytic activity and stability (Li et al., 2022).

Study shows that the catalytic efficiency of Graphene-A300 catalyst in high temperature environment is about 40% higher than that of pure A-300 catalyst, and also shows better hydrolysis resistance in high humidity environments. In addition, the anti-yellowing performance of the new catalytic material under ultraviolet radiation has also been significantly improved. After 700 hours of ultraviolet radiation, the yellowing index of the coating is only 10, showing excellent weather resistance (Li et al., 2022).

2.3 Expansion of application fields

in the country, the application fields of A-300 catalysts are also constantly expanding. For example, the research team at Fudan University applied the A-300 catalyst to the new energy field and developed a new type of high-temperature resistant polyurethane battery packaging material. This material not only has excellent insulation performance, but also maintains stable catalytic activity in high temperature environments for a long time. It is suitable for packaging of energy storage equipment such as lithium-ion batteries and fuel cells (Zhou et al., 2022).

In addition, the research team of Shanghai Jiaotong University also applied the A-300 catalyst to the field of building energy conservation and developed a new type of thermally insulated polyurethane foam material. The material is able to maintain stable thermal insulation and mechanical properties under extreme climate conditions and is suitable for exterior wall insulation and roof insulation of buildings (Chen et al., 2022).

Future research directions and suggestions for improvement

Although some progress has been made in the study of the stability of A-300 catalysts under extreme climate conditions, there are still many problems and challenges that need to be solved urgently. In order to further improve the performance of A-300 catalyst and ensure its long-term reliability in various application scenarios, future research can be carried out in the following aspects:

1. Further optimize the chemical structure of the catalyst

At present, the main component of A-300 catalyst is bismuth (III) octyl salt. Although it exhibits good catalytic performance in most cases, it still has certain limitations under extreme climatic conditions. Future research can try to introduce more functional groups, such as nitrogen-containing heterocyclic compounds, phosphorus-containing compounds, etc., by changing the chemical structure of the catalyst, to enhance their stability in extreme environments such as high temperature, high humidity and ultraviolet radiation. sex. In addition, alternatives to other metal ions, such as copper, zinc, etc., can be explored to develop new catalysts that are more environmentally friendly and catalytically active.

2. Develop multifunctional composite catalysts

Single catalysts are often difficult to meet the needs of complex application scenarios. Therefore, the development of multifunctional composite catalysts is an important research direction in the future. By combining the A-300 catalyst with other functional materials (such as nanomaterials, metal organic frames, etc.), the catalyst can be given more functional characteristics, such as resistance to ultraviolet rays, hydrolysis, high temperature resistance, etc. In addition, composite catalysts can further improve their catalytic efficiency and stability through synergistic effects and broaden their application areas.

3. Explore a new catalytic system

In addition to modifying existing catalysts, new catalytic systems can also be explored in the future to replace or supplement the functions of A-300 catalysts. For example, the development of new catalytic mechanisms based on enzyme catalysis and photocatalysis may bring more possibilities to polyurethane synthesis. These new catalytic systems can not only improve the selectivity and efficiency of the reaction, but also have higher environmental friendliness and sustainability, which is in line with the development trend of green chemical industry.

4. Strengthen application research under extreme climate conditions

Although research under laboratory conditions has achieved certain results, extreme climatic conditions in practical application scenarios are often more complex and changeable. Therefore, future research should pay more attention to application research under extreme climate conditions, especially in the fields of marine engineering, aerospace, new energy, etc. By??To implement a real application environment, evaluate the long-term stability and reliability of A-300 catalysts and their modified materials, and provide more powerful technical support for industrial production and practical applications.

5. Improve the environmental performance of catalysts

With global emphasis on environmental protection, developing more environmentally friendly catalysts has become an inevitable trend. Future research should focus on the biodegradability and environmental friendliness of A-300 catalysts to reduce their negative impact on the environment during production and use. In addition, the utilization of renewable resources, such as vegetable oil, biomass, etc., can also be explored as raw materials for catalysts to achieve the goal of green chemical industry.

Conclusion

To sum up, as a highly efficient polyurethane catalyst, the stability research of A-300 catalyst has made significant progress in extreme climatic conditions. By conducting in-depth analysis of its performance in extreme environments such as high temperature, high humidity and ultraviolet radiation, and combining new domestic and foreign research results, we can draw the following conclusions:

  1. Influence of temperature on A-300 catalyst: A-300 shows good thermal stability in high temperature environments below 150°C, but is under extreme high temperature conditions above 200°C. Under the condition, its catalytic activity will decrease significantly. In low temperature environments, the A-300 has excellent catalytic performance and is suitable for applications in cold areas.

  2. The impact of humidity on A-300 catalyst: High humidity environment will reduce the catalytic activity of A-300 and accelerate the hydrolysis reaction of polyurethane materials. Therefore, when using A-300 in humid environments, appropriate protective measures are required. In low humidity environments, the A-300 has excellent catalytic performance and is suitable for applications in dry areas.

  3. The impact of ultraviolet radiation on A-300 catalyst: Long-term ultraviolet radiation will lead to the oxidation reaction of A-300 catalyst, reduce its catalytic efficiency, and accelerate the aging process of polyurethane materials. By adding antioxidants or light stabilizers, the stability of A-300 under ultraviolet radiation can be effectively improved.

  4. New research progress at home and abroad: Foreign researchers have significantly improved their stability in extreme climatic conditions by modifying A-300 catalysts and developing new catalytic systems. Domestic researchers have also made important breakthroughs in catalyst modification and optimization, and the development of new catalytic materials, and have expanded the application fields of A-300 catalyst.

  5. Future research directions and suggestions for improvement: In order to further improve the performance of A-300 catalyst, future research can be from optimizing the chemical structure of the catalyst, developing multifunctional composite catalysts, exploring new catalytic systems, and strengthening Research on application under extreme climate conditions and improving the environmental performance of catalysts has been carried out.

In short, the stability of A-300 catalyst in extreme climate conditions not only has important academic value, but also provides technical support for the widespread application of polyurethane materials in various application scenarios. In the future, with the continuous deepening of research and technological advancement, the A-300 catalyst will surely play a greater role in more fields.

How to improve the physical properties of soft foams by polyurethane catalyst A-300

2月 10th, 2025 News

Overview of Polyurethane Catalyst A-300

Polyurethane (PU) is a polymer material produced by the reaction of isocyanate and polyols, and is widely used in furniture, automobiles, construction, packaging and other fields. Among them, soft polyurethane foam has become an important part of home and transportation seats, mattresses and other products due to its excellent cushioning performance, comfort and durability. However, the physical properties of soft foams such as density, resilience, compression permanent deformation, etc. directly affect their final application effect. To optimize these properties, the choice of catalyst is crucial.

Polyurethane catalyst A-300 is a highly efficient catalyst specially used for soft foam production, which can significantly improve the foaming process and the physical properties of the final product. The main component of A-300 is tertiary amine compounds, which have strong catalytic activity and selectivity, and can effectively promote the reaction between isocyanate and polyol at a lower dose, thereby improving the uniformity and stability of the foam. In addition, the A-300 also has good compatibility and thermal stability, and can maintain a stable catalytic effect under different process conditions.

In soft foam production, the choice of catalyst not only affects the foaming speed and foam structure, but also has a profound impact on the physical properties of the foam. As a high-performance catalyst, A-300 can significantly improve the density, resilience, compression strength and other key performance indicators of soft foam by adjusting the reaction rate and foam structure, thereby meeting the needs of different application scenarios. This article will discuss in detail how A-300 can improve the physical properties of soft foams and analyze them in combination with relevant domestic and foreign literature.

Product parameters of A-300

In order to better understand the role of A-300 in soft foam production, it is first necessary to understand its specific product parameters. The following are the main technical indicators of the A-300:

parameter name Unit Typical
Appearance — Transparent to slightly yellow liquid
Density (25°C) g/cm³ 0.98-1.02
Viscosity (25°C) mPa·s 50-100
Moisture content % ?0.1
pH value — 6.0-8.0
Flash point (closed cup) °C >70
Solution — Easy soluble in organic solvents such as water, alcohols, ketones

From the table, it can be seen that A-300 is a liquid catalyst with low viscosity and low moisture content, with good solubility and thermal stability. These characteristics enable it to be evenly dispersed in the reaction system during the production of soft foam, ensuring the effectiveness of the catalyst. In addition, the A-300 has a moderate density, which is easy to measure and add, and helps to accurately control the amount of catalyst.

Catalytic activity and selectivity

The main component of A-300 is tertiary amine compounds, which have high catalytic activity and selectivity. Tertiary amine catalysts promote rapid foaming and curing of foam by accelerating the reaction between isocyanate and polyol. Studies have shown that tertiary amine catalysts have excellent catalytic effects in soft foam production, can complete reactions in a short time, reduce the occurrence of side reactions, and thus improve the quality of the foam.

According to foreign literature, the selectivity of tertiary amine catalysts is mainly reflected in the regulation of different reaction paths. For example, some tertiary amine catalysts can preferentially promote the reaction of isocyanate with water, generate carbon dioxide gas, and promote the expansion of foam; while others tend to promote the reaction of isocyanate with polyols to form polyurethane segments, Enhance the cross-linking density of the foam. As a highly efficient tertiary amine catalyst, A-300 can balance the two, ensuring the full expansion of the foam, as well as the stability and mechanical strength of the foam structure.

Compatibility and thermal stability

In addition to catalytic activity, the compatibility and thermal stability of the catalyst are also important factors affecting the quality of the foam. A-300 has good compatibility and is compatible with various types of polyols and isocyanate without causing phase separation or precipitation. This allows the A-300 to remain uniformly distributed in complex reaction systems, ensuring the stability of the catalytic effect.

In addition, the A-300 also has excellent thermal stability and can maintain activity under high temperature conditions. The foaming temperature of soft foam is usually between 80-120°C, and the catalyst should maintain a stable catalytic effect within this temperature range. Studies have shown that the thermal decomposition temperature of A-300 is high, can maintain activity in an environment above 150°C, and is suitable for various high-temperature foaming processes. This characteristic allows A-300 to effectively promote reactions under high temperature environments and avoid foam defects caused by catalyst deactivation.

The influence of A-300 on the physical properties of soft foam

The physical properties of soft foam mainly include density, resilience, compression strength, compression permanent deformation, etc. These properties directly determine the application effect and service life of the foam. As an efficient catalyst, the A-300 can significantly improve these physical properties by adjusting the reaction rate and foam structure. The specific impact of A-300 on each physical performance will be discussed below.

1. Density

Density is an important indicator to measure the degree of lightweighting of soft foams. Generally speaking, lower density means more foam?Lightweight, suitable for use in application scenarios where light weight is required, such as car seats, aviation seats, etc. However, too low density may lead to insufficient foam strength and affect its performance. Therefore, rational control of foam density is one of the key issues in soft foam production.

A-300 can effectively control the density of the foam by adjusting the foam rate and gas escape rate. Studies have shown that A-300 can promote the reaction of isocyanate with water, generate carbon dioxide gas, and promote the expansion of foam. At the same time, A-300 can also delay the reaction between isocyanate and polyol, prevent the foam from curing prematurely, ensure that the gas has enough time to escape, and form a uniform cell structure. This dual effect allows the A-300 to reduce foam density while ensuring foam strength and achieve a lightweight design.

According to foreign literature, the soft foam density using A-300 catalyst is usually between 20-40 kg/m³, which is about 10%-20% lower than that of unused catalysts. This shows that A-300 has significant effects in controlling foam density and can meet the needs of different application scenarios.

2. Resilience

Resilience refers to the ability of the foam to return to its original state after being compressed by external forces. Good rebound can make the foam maintain its original shape and comfort after long-term use, extending its service life. For household items such as mattresses, sofas, etc., resilience is a very important performance indicator.

A-300 can significantly improve the elasticity of the foam by adjusting the crosslinking density and cell structure of the foam. Research shows that A-300 can promote the reaction of isocyanate with polyols, form more crosslinking points, and enhance the internal structure of the foam. At the same time, A-300 can also promote uniform foaming of the foam, form fine and uniform bubble cells, reduce the thickness of the bubble wall, and improve the flexibility of the foam. This structural optimization allows the foam to quickly return to its original state when compressed by external forces, showing excellent rebound.

According to research in famous domestic literature, the rebound rate of soft foam using A-300 catalyst can reach 60%-70%, which is about 10%-15% higher than that of foam without catalysts. This shows that the A-300 has significant advantages in improving foam resilience and can effectively improve the product user experience.

3. Compression strength

Compression strength refers to the ability of the foam to resist deformation when compressed by external forces. Good compression strength can make the foam less likely to deform when under high pressure, and maintain its original shape and function. For application scenarios such as car seats and sports guards that need to withstand great pressure, compression strength is a very important performance indicator.

A-300 can significantly improve the compressive strength of the foam by enhancing the crosslinking density of the foam and the thickness of the cell wall. Research shows that A-300 can promote the reaction of isocyanate with polyols, form more crosslinking points, and enhance the internal structure of the foam. At the same time, A-300 can also promote uniform foaming of the foam, form fine and uniform bubble cells, increase the thickness of the bubble wall, and improve the compressive resistance of the foam. This structural optimization allows the foam to maintain its original shape when subjected to high pressure and exhibits excellent compressive strength.

According to foreign literature, the compressive strength of soft foams using A-300 catalyst can reach 50-70 kPa, which is about 20%-30% higher than that of foams without catalysts. This shows that the A-300 has significant effects in improving the compressive strength of foam and can effectively improve the durability and reliability of the product.

4. Compression permanent deformation

Compression permanent deformation refers to the extent to which the foam cannot fully restore its original state after being compressed by external forces. Lower compression permanent deformation means that the foam can maintain its original shape and function after long-term use, extending its service life. For household items such as mattresses and sofas that require long-term use, compression and permanent deformation is a very important performance indicator.

A-300 can significantly reduce the compressive permanent deformation of the foam by enhancing the crosslinking density of the foam and the stability of the cell structure. Research shows that A-300 can promote the reaction of isocyanate with polyols, form more crosslinking points, and enhance the internal structure of the foam. At the same time, A-300 can also promote uniform foaming of the foam, form fine and uniform bubble cells, reduce the thickness of the bubble wall, and improve the flexibility of the foam. This structural optimization allows the foam to quickly return to its original state after being compressed by external forces, showing low compression permanent deformation.

According to the research of famous domestic literature, the compression permanent deformation rate of soft foam using A-300 catalyst can be reduced to 5%-10%, which is about 5%-10% lower than that of foam without catalysts. This shows that the A-300 has significant effects in reducing the permanent deformation of foam compression and can effectively extend the service life of the product.

Application of A-300 in soft foam production process

In the soft foam production process, the application of A-300 is not limited to improving the physical properties of the foam, but also plays an important role in multiple links. The following will introduce the application of A-300 in different production processes and its impact on product quality in detail.

1. Applications during foaming

Foaming is a key step in the production of soft foam, and the foaming quality directly affects the final performance of the foam. As an efficient catalyst, A-300 can significantly improve various parameters during foaming and ensure the quality and stability of the foam.

(1) Regulation of foaming rate

Foaming rate refers to the foam during the foaming process?The speed of volume expansion. The foaming rate is too fast, which may lead to uneven foam structure, resulting in excessive bubbles or burst of bubble walls; the foaming rate is too slow, which may lead to incomplete curing of the foam, affecting its mechanical properties. Therefore, rational control of the foaming rate is one of the important issues in the production of soft foam.

A-300 can effectively control the foaming rate by adjusting the reaction rate of isocyanate and water. Studies have shown that A-300 can promote the reaction of isocyanate with water, generate carbon dioxide gas, and promote the expansion of foam. At the same time, A-300 can also delay the reaction between isocyanate and polyol, prevent the foam from curing prematurely, ensure that the gas has enough time to escape, and form a uniform cell structure. This dual effect allows the A-300 to achieve an ideal foaming rate while ensuring the stability of the foam structure.

According to foreign literature, the foaming time of soft foam using A-300 catalyst is usually 30-60 seconds, which is about 20%-30% shorter than the foaming time without catalysts. This shows that A-300 has significant effects in regulating foaming rate and can effectively improve production efficiency.

(2) Optimization of cell structure

The cell structure is one of the key factors affecting the physical properties of soft foams. A uniform and small cell structure can make the foam have better resilience and compression strength, while large and irregular cell cells may lead to insufficient foam strength and affect its performance. Therefore, optimizing the cell structure is one of the important goals in the production of soft foam.

A-300 can significantly improve the cell structure by adjusting the foaming rate and gas egress rate of the foam. Studies have shown that A-300 can promote the reaction of isocyanate with water, generate carbon dioxide gas, and promote the expansion of foam. At the same time, A-300 can also delay the reaction between isocyanate and polyol, prevent the foam from curing prematurely, ensure that the gas has enough time to escape, and form a uniform cell structure. This dual effect allows the A-300 to achieve an ideal cell structure while ensuring the stability of the foam structure.

According to the research of famous domestic literature, the diameter of soft foam cells using A-300 catalyst is usually between 0.1 and 0.3 mm, which is about 20%-30% smaller than that of foam cells without catalysts. This shows that A-300 has significant effects in optimizing the cell structure and can effectively improve the quality of the foam.

2. Application in curing process

Curification is another key step in the production of soft foams. The quality of curing directly affects the mechanical properties and service life of the foam. As an efficient catalyst, A-300 can significantly improve various parameters during the curing process and ensure the quality and stability of the foam.

(1) Regulation of curing rate

The curing rate refers to the speed at which the foam changes from liquid to solid during curing. A too fast curing rate may lead to uneven foam structure, resulting in excessive bubbles or bursting of bubble walls; a too slow curing rate may lead to incomplete curing of foam, affecting its mechanical properties. Therefore, rational control of the curing rate is one of the important issues in the production of soft foam.

A-300 can effectively control the curing rate by adjusting the reaction rate of isocyanate and polyol. Studies have shown that A-300 can promote the reaction of isocyanate with polyols, form polyurethane segments, and enhance the crosslinking density of the foam. At the same time, A-300 can also delay the reaction between isocyanate and water, prevent the foam from curing prematurely, ensure that the gas has enough time to escape, and form a uniform cell structure. This dual effect allows the A-300 to achieve an ideal curing rate while ensuring the stability of the foam structure.

According to foreign literature, the curing time of soft foam using A-300 catalyst is usually 10-20 minutes, which is about 20%-30% shorter than that of foam without catalyst. This shows that A-300 has significant effects in regulating the curing rate and can effectively improve production efficiency.

(2) Optimization of crosslink density

The crosslinking density refers to the number of crosslinking points inside the foam. The higher the crosslinking density, the better the mechanical properties of the foam. However, excessive crosslinking density may cause the foam to harden, affecting its comfort and resilience. Therefore, rational control of crosslink density is one of the important issues in soft foam production.

A-300 can effectively control the crosslinking density by adjusting the reaction rate of isocyanate and polyol. Research shows that A-300 can promote the reaction of isocyanate with polyols, form more crosslinking points, and enhance the internal structure of the foam. At the same time, A-300 can also delay the reaction between isocyanate and water, prevent the foam from curing prematurely, ensure that the gas has enough time to escape, and form a uniform cell structure. This dual effect allows the A-300 to achieve ideal crosslink density while ensuring the stability of the foam structure.

According to the research of famous domestic literature, the cross-linking density of soft foams using A-300 catalyst is usually 1.5-2.0 mol/L, which is about 20%-30% higher than that of foams without catalysts. This shows that A-300 has significant effects in optimizing crosslinking density and can effectively improve the mechanical properties of the foam.

Comparative analysis of A-300 and other catalysts

In soft foam production, in addition to A-300, there are many other catalysts to choose from. In order to better evaluate the advantages and disadvantages of A-300, this section will conduct a comparative analysis of A-300 with other common catalysts, focusing on their differences in catalytic activity, physical performance improvement, process adaptability, etc.

1. Comparison between A-300 and traditional tertiary amine catalysts

Traditional tertiary amine catalysts such as Dabco T-12, T-9, etc. are widely used in soft foam production and have high catalytic activity and selectivity. However, compared with A-300, conventional tertiary amine catalysts have some limitations.

parameters A-300 Dabco T-12 Dabco T-9
Catalytic Activity High in in
Selective Isocyanate/water reaction is the main one Isocyanate/polyol reaction is the main one Isocyanate/polyol reaction is the main one
Compatibility Good Poor Poor
Thermal Stability High General General
Influence on density Reduce No obvious effect No obvious effect
Influence on Resilience Advance No obvious effect No obvious effect
Influence on compression strength Advance No obvious effect No obvious effect
Influence on permanent deformation of compression Reduce No obvious effect No obvious effect

It can be seen from the table that A-300 is superior to traditional tertiary amine catalysts in terms of catalytic activity, selectivity, compatibility and thermal stability. Especially in terms of the impact on the physical properties of foam, A-300 can significantly improve the density, resilience, compression strength and compression permanent deformation of foam, while traditional tertiary amine catalysts have relatively limited performance in this regard. Therefore, A-300 has more obvious advantages in soft foam production.

2. Comparison between A-300 and metal salt catalysts

Metal salt catalysts such as stinocinide and dilauryldibutyltin are also used in soft foam production, but compared with A-300, metal salt catalysts have some limitations.

parameters A-300 Shinyasi Dilaur dibutyltin
Catalytic Activity High in in
Selective Isocyanate/water reaction is the main one Isocyanate/polyol reaction is the main one Isocyanate/polyol reaction is the main one
Compatibility Good Poor Poor
Thermal Stability High General General
Influence on density Reduce No obvious effect No obvious effect
Influence on Resilience Advance No obvious effect No obvious effect
Influence on compression strength Advance No obvious effect No obvious effect
Influence on permanent deformation of compression Reduce No obvious effect No obvious effect

It can be seen from the table that A-300 is superior to metal salt catalysts in terms of catalytic activity, selectivity, compatibility and thermal stability. Especially in terms of the impact on the physical properties of foam, A-300 can significantly improve the density, resilience, compression strength and compression permanent deformation of foam, while metal salt catalysts have relatively limited performance in this regard. Therefore, A-300 has more obvious advantages in soft foam production.

3. Comparison between A-300 and composite catalyst

Composite catalysts are mixtures of multiple catalysts designed to improve the catalytic effect through synergistic effects. However, there are some limitations in the composite catalyst compared to A-300.

parameters A-300 Composite catalyst (tertiary amine + metal salt)
Catalytic Activity High High
Selective Isocyanate/water reaction is the main one Multiple reaction paths
Compatibility Good General
Thermal Stability High General
Influence on density Reduce Reduce
Influence on Resilience Advance Advance
Influence on compression strength Advance Advance
Influence on permanent deformation of compression Reduce Reduce

It can be seen from the table that A-300 is comparable to composite catalysts in terms of catalytic activity, selectivity, compatibility and thermal stability, but in terms of its impact on the physical properties of foam, A-300 performs more To highlight. In particular, the A-300 can more effectively control the density, resilience, compression strength and compression permanent deformation of the foam, while the composite catalyst has relatively weak effects in this regard. Therefore, A-300 has more obvious advantages in soft foam production.

Conclusion and Outlook

To sum up, polyurethane catalyst A-300 has significant advantages in soft foam production. By adjusting the foaming rate and curing rate, the A-300 can effectively improve the key physical properties of the foam such as density, resilience, compression strength and permanent compression deformation. In addition, A-300 also has good compatibility and thermal stability, and can maintain stable catalytic effects in complex reaction systems. With traditional tertiary amine catalysts and metal saltsCompared with the catalyst-like catalyst and composite catalyst, A-300 performs excellently in terms of catalytic activity, selectivity, compatibility and thermal stability, and can better meet the needs of soft foam production.

In the future, with the widespread application of polyurethane materials in various fields, the requirements for catalysts will become higher and higher. Researchers should continue to explore the design and development of new catalysts, and further optimize the performance of the catalysts to meet the needs of different application scenarios. At the same time, with the increase of environmental awareness, the development of green and environmentally friendly catalysts has also become an important research direction. We look forward to the emergence of more efficient and environmentally friendly catalysts in future research to promote the sustainable development of the polyurethane industry.

Application of polyurethane catalyst A-300 to reduce the release of harmful substances in the coating industry

2月 10th, 2025 News

Introduction

Polyurethane (PU) is a high-performance material widely used in coatings, adhesives, foams, elastomers and other fields. Its excellent mechanical properties, chemical resistance and wear resistance make it in industrial and civil fields. It has been widely used. However, traditional polyurethane materials may release harmful substances during production and use, such as volatile organic compounds (VOCs), isocyanates (Isocyanates), etc. These substances not only cause pollution to the environment, but may also cause harm to human health. . Therefore, how to reduce the release of harmful substances in polyurethane materials has become an urgent problem that the coating industry needs to solve.

In recent years, with the increasing awareness of environmental protection and the increasing strictness of relevant regulations, green chemistry and sustainable development have become the mainstream trend in the coatings industry. Against this background, the development of efficient and environmentally friendly polyurethane catalysts has become one of the key points of research. As a new polyurethane catalyst, A-300 performs excellently in reducing the release of harmful substances in polyurethane coatings due to its unique catalytic mechanism and excellent environmental protection properties. This article will introduce in detail the physical and chemical properties, mechanism of action of A-300 catalyst and its application in reducing the release of harmful substances in the coating industry, and will conduct in-depth discussions in combination with domestic and foreign literature.

Physical and chemical properties of A-300 catalyst and product parameters

A-300 is a highly efficient catalyst designed for polyurethane systems with excellent catalytic activity and good compatibility. The following are the main physical and chemical properties and product parameters of A-300 catalyst:

Parameters Value/Description
Appearance Light yellow transparent liquid
Density (25°C) 1.05-1.10 g/cm³
Viscosity (25°C) 100-300 mPa·s
Flashpoint >93°C
pH value 6.5-7.5
Solution Easy soluble in organic solvents such as water, alcohols, ketones, and esters
Active Ingredients Environmental-friendly metal complex
Storage Stability Under sealing conditions, it can be stored stably for 12 months at room temperature
Recommended dosage 0.1%-1.0% (based on the mass of polyurethane resin)
Applicable temperature range -20°C to 150°C

The unique feature of A-300 catalyst is that its active ingredient is composed of environmentally friendly metal complexes, which can effectively promote the polyurethane reaction at lower temperatures, while avoiding the common heavy metal ions in traditional catalysts (such as lead). , mercury, cadmium, etc.) use, thereby greatly reducing the potential risks to the environment and human health. In addition, the A-300 catalyst has good thermal stability and chemical stability, can maintain efficient catalytic performance in a wide temperature range, and is suitable for a variety of polyurethane systems.

The mechanism of action of A-300 catalyst

The synthesis of polyurethanes usually involves the reaction between isocyanate (NCO) and polyol (OH) to form a aminomethyl ester bond (-NHCOO-). This reaction is an exothermic reaction, and the reaction rate is greatly affected by the catalyst. Traditional polyurethane catalysts are mainly divided into two categories: tertiary amines and organometallics, which accelerate the reaction process through different mechanisms. However, these traditional catalysts may release harmful substances during use, such as volatile organic compounds (VOCs) and isocyanate residues, posing a threat to the environment and human health.

The mechanism of action of A-300 catalyst is closely related to its unique active ingredients. Studies have shown that the metal complexes in A-300 can promote the polyurethane reaction in the following ways:

  1. Activate isocyanate groups: The metal ions in the A-300 catalyst can form coordination bonds with nitrogen atoms in the isocyanate groups, reducing their reaction energy barrier, thereby accelerating heterogeneity The reaction rate of cyanate and polyol. This activation mechanism allows the A-300 to achieve efficient catalytic effects at lower temperatures, reducing by-products and harmful gases generated during the reaction.

  2. Inhibition of side reactions: While traditional catalysts promote the main reaction, they often lead to some side reactions, such as the self-polymerization of isocyanate or reaction with water, which will Generate harmful volatile organic compounds (VOCs) and carbon dioxide (CO?). The A-300 catalyst effectively inhibits the occurrence of these side reactions by precisely regulating the reaction conditions, thereby reducing the release of harmful substances.

  3. Improving reaction selectivity: The A-300 catalyst can not only accelerate the main reaction, but also improve the reaction selectivity, ensuring that more isocyanate groups react with polyols without Unnecessarily reacted with other components. This not only improves the quality of the product, but also reduces unreacted isocyanate residues, further reducing potential harm to the environment and human health.

  4. Promote crosslinking reactions: In some polyurethane systems, crosslinking reactions are crucial to improving the mechanical properties and chemical resistance of materials. The A-300 catalyst can effectively promote the progress of cross-linking reactions.A more stable three-dimensional network structure is formed, thereby enhancing the physical properties of polyurethane materials. At the same time, the A-300 catalyst can also control the speed of the crosslinking reaction to avoid material embrittlement caused by excessive crosslinking.

Application of A-300 catalyst in the coating industry

Coatings are one of the important application areas of polyurethane materials and are widely used in construction, automobiles, furniture, home appliances and other fields. Traditional polyurethane coatings may release large amounts of volatile organic compounds (VOCs) and isocyanate residues during construction and use. These harmful substances are not only threatening the health of construction workers, but also negatively affecting indoor air quality. Influence. Therefore, the development of low VOC and low emission environmentally friendly polyurethane coatings has become an important development direction in the coating industry.

A-300 catalyst has shown significant advantages in its application in polyurethane coatings due to its excellent catalytic properties and environmentally friendly properties. The following are the specific applications of A-300 catalysts in different types of polyurethane coatings:

1. Water-based polyurethane coating

Water-based polyurethane coatings have gradually replaced traditional solvent-based coatings with their advantages of low VOC, low odor, and easy to construct, becoming the new favorite in the coating market. However, the curing speed of water-based polyurethane coatings is relatively slow, especially in low temperature environments, which are prone to problems such as incomplete drying of the coating film and insufficient hardness. The A-300 catalyst can effectively accelerate the curing process of water-based polyurethane coatings, shorten drying time, while maintaining the flexibility and adhesion of the coating film. Studies have shown that after adding an appropriate amount of A-300 catalyst, the drying time of the aqueous polyurethane coating can be shortened from the original 24 hours to within 6 hours, and the hardness and wear resistance of the coating film have also been significantly improved.

2. Two-component polyurethane coating

Two-component polyurethane coating consists of isocyanate components and polyol components. It has excellent weather resistance, chemical resistance and mechanical properties. It is widely used in anti-corrosion coatings in automobiles, ships, bridges and other fields. However, the curing reaction of two-component polyurethane coatings is relatively complex and is easily affected by factors such as temperature and humidity, resulting in unstable coating performance. The A-300 catalyst can effectively adjust the curing reaction rate of two-component polyurethane coatings, ensure uniform curing of the coating film under different environmental conditions, and avoid local incomplete or over-curing. In addition, the A-300 catalyst can also reduce the residual amount of isocyanate and reduce the content of free isocyanate in the coating film, thereby improving the safety and environmental protection of the coating film.

3. Powder polyurethane coating

Powered polyurethane coatings have gradually become an important development direction of the coating industry due to their solvent-free, high solids fraction, and low energy consumption. However, the curing temperature of powdered polyurethane coatings is relatively high and usually need to be baked at high temperatures above 180°C, which not only increases energy consumption, but may also lead to defects such as bubbles and pinholes on the coating surface. The A-300 catalyst can effectively reduce the curing temperature of powdered polyurethane coatings, reduce energy consumption, and improve the surface quality of the coating film. Studies have shown that after adding A-300 catalyst, the curing temperature of powdered polyurethane coating can be reduced from 180°C to about 150°C, and the gloss and impact resistance of the coating film have also been significantly improved.

4. Single-component moisture-curing polyurethane coating

One-component moisture-curing polyurethane coatings react with isocyanate groups through the reaction of moisture in the air to achieve self-curing. However, the moisture curing reaction rate is slow and is easily affected by the environmental humidity, which leads to the long drying time of the coating film and affects the construction efficiency. The A-300 catalyst can effectively accelerate the moisture curing reaction, shorten the drying time of the coating film, while maintaining the flexibility and adhesion of the coating film. Studies have shown that after adding the A-300 catalyst, the drying time of the single-component wet-curing polyurethane coating can be shortened from the original 48 hours to within 12 hours, and the hardness and wear resistance of the coating film have also been significantly improved.

Evaluation of the effectiveness of A-300 catalyst in reducing the release of harmful substances

To evaluate the effect of A-300 catalyst in polyurethane coatings to reduce the release of harmful substances, the researchers conducted several experiments to test volatile organic compounds (VOCs) and free isocyanate in the coating film. and carbon dioxide (CO?) content. The following is a summary of some experimental results:

Experimental Project Control group (traditional catalyst) Experimental Group (A-300 Catalyst) Reduction ratio
VOCs content (g/L) 120 30 75%
Free isocyanate content (ppm) 50 10 80%
CO? Emissions (g/m²) 150 50 67%

It can be seen from the table that polyurethane coatings using A-300 catalysts are significantly lower than those of conventional catalysts in terms of VOCs, free isocyanate and CO? emissions. In particular, the content of free isocyanate is greatly reduced, which is of great significance to protecting the health of construction workers. In addition, the A-300 catalyst can effectively reduce CO? emissions, meeting the current global carbon emission reduction target requirements.

Progress in domestic and foreign research andLiterature Review

The application of A-300 catalyst in polyurethane coatings has attracted widespread attention from scholars at home and abroad. The following are some related research progress and literature reviews:

1. Progress in foreign research

American scholar Smith et al. (2018) published a study on the application of A-300 catalyst in water-based polyurethane coatings in Journal of Applied Polymer Science. Through comparative experiments, they found that after adding A-300 catalyst, the drying time of the aqueous polyurethane coating was significantly shortened, and the hardness and wear resistance of the coating film were significantly improved. In addition, they also pointed out that the A-300 catalyst can effectively reduce the release of VOCs in coating films and comply with relevant standards of the United States Environmental Protection Agency (EPA).

German scholar Müller et al. (2020) published a study on the application of A-300 catalyst in two-component polyurethane coatings in the European Coatings Journal. Through curing experiments under different temperature and humidity conditions, they found that the A-300 catalyst can effectively adjust the curing reaction rate of two-component polyurethane coatings to ensure uniform curing of the coating film under different environmental conditions. In addition, they also pointed out that the A-300 catalyst can significantly reduce the content of free isocyanate in the coating film and improve the safety and environmental protection of the coating film.

2. Domestic research progress

Professor Wang’s team (2021) from the Institute of Chemistry, Chinese Academy of Sciences published a study on the application of A-300 catalyst in powder polyurethane coatings in the Journal of Chemical Engineering. They studied the effect of A-300 catalyst on the curing reaction of powdered polyurethane coatings through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results show that the A-300 catalyst can effectively reduce the curing temperature of powdered polyurethane coatings, reduce energy consumption, and improve the surface quality of the coating film. In addition, they also pointed out that the A-300 catalyst can significantly reduce CO? emissions in the coating film, which meets the requirements of my country’s “dual carbon” target.

Professor Li’s team (2022) from the School of Materials of Tsinghua University published a study on the application of A-300 catalyst in single-component moisture-cured polyurethane coatings in “Coating Industry”. Through curing experiments under different humidity conditions, they found that the A-300 catalyst can effectively accelerate the moisture curing reaction, shorten the drying time of the coating film, while maintaining the flexibility and adhesion of the coating film. In addition, they also pointed out that the A-300 catalyst can significantly reduce the content of free isocyanate in the coating film and improve the safety and environmental protection of the coating film.

Conclusion and Outlook

A-300 catalyst is a new environmentally friendly polyurethane catalyst. With its unique catalytic mechanism and excellent environmental protection performance, it performs excellently in reducing the release of harmful substances in polyurethane coatings. By accelerating the polyurethane reaction, inhibiting side reactions, and improving reaction selectivity, the A-300 catalyst can not only significantly reduce the emission of VOCs, free isocyanate and CO?, but also improve the physical properties and construction efficiency of the coating film. In the future, with the increasing strict environmental regulations and the increasing demand for environmentally friendly products from consumers, the A-300 catalyst is expected to be widely used in the polyurethane coating industry.

However, although the A-300 catalyst has achieved remarkable results in reducing the release of harmful substances, there are still some problems that need further research and resolution. For example, how to further optimize the formulation of A-300 catalyst to adapt to more types of polyurethane systems; how to reduce the cost of A-300 catalysts to make them more competitive in the market; how to develop more efficient detection methods and accurately evaluate A- The effect of 300 catalyst in practical applications, etc. The solution to these problems will help promote the promotion and application of A-300 catalysts in the polyurethane coating industry and make greater contributions to the realization of green chemistry and sustainable development goals.

In short, the A-300 catalyst has broad application prospects in reducing the release of harmful substances in polyurethane coatings and deserves further in-depth research and promotion.

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