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DMCHA (N,N-dimethylcyclohexylamine): an ideal water-based polyurethane catalyst option to facilitate green production

3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): an ideal water-based polyurethane catalyst option to facilitate green production

Introduction

With the increasing emphasis on environmental protection and sustainable development around the world, green chemistry and green production technology have become an important development direction of the chemical industry. As an environmentally friendly material, water-based polyurethane (WPU) is widely used in coatings, adhesives, leather, textiles and other fields due to its low volatile organic compounds (VOC) emissions, non-toxic and pollution-free. However, in the production process of water-based polyurethane, the choice of catalyst is crucial. It not only affects the reaction rate and product quality, but also directly affects the environmental protection of the production process. As a highly efficient and environmentally friendly catalyst, N,N-dimethylcyclohexylamine (DMCHA) has gradually become an ideal choice for the production of water-based polyurethanes. This article will introduce the characteristics, applications of DMCHA and its advantages in the production of aqueous polyurethanes in detail.

1. Basic characteristics of DMCHA

1.1 Chemical structure

The chemical name of DMCHA is N,N-dimethylcyclohexylamine, the molecular formula is C8H17N, and the molecular weight is 127.23 g/mol. Its chemical structure is as follows:

 CH3
        |
   N-CH3
    /
   /
  /
 /
CH2-CH2-CH2-CH2-CH2

1.2 Physical Properties

DMCHA is a colorless to light yellow liquid with a unique amine odor. Its main physical properties are shown in the following table:

Properties value
Boiling point (?) 160-162
Density (g/cm³) 0.85-0.87
Flash point (?) 45
Solution Easy soluble in water, alcohols, and ethers
Steam pressure (mmHg) 1.2 (20?)

1.3 Chemical Properties

DMCHA is a strong basic organic amine with high reactivity. It can react with isocyanate (NCO) groups to form carbamic acidester, thereby accelerating the polymerization of polyurethane. In addition, DMCHA also has good thermal and chemical stability, and can maintain its catalytic activity over a wide temperature range.

2. Application of DMCHA in the production of aqueous polyurethane

2.1 Catalytic mechanism

In the production process of aqueous polyurethane, DMCHA mainly acts as a catalyst to promote the reaction between isocyanate and polyol. The catalytic mechanism is as follows:

  1. Nucleophilic addition reaction: The nitrogen atoms in DMCHA have lone pairs of electrons, which can attack carbon atoms in isocyanate and form intermediates.
  2. Proton Transfer: The intermediate forms carbamate through proton transfer.
  3. Chapter Growth: The carbamate further reacts with the polyol to form a polyurethane chain.

2.2 Catalytic effect

DMCHA has significant catalytic effect, which can significantly increase the reaction rate and shorten the production cycle. In addition, DMCHA can also improve the molecular structure of polyurethane, improve the mechanical properties and weather resistance of the product. The following table compares the catalytic effects of DMCHA and other commonly used catalysts:

Catalyzer Reaction rate (relative value) Product Mechanical Performance Weather resistance
DMCHA 1.5 Outstanding Outstanding
Dibutyltin dilaurate 1.0 Good Good
Triethylamine 0.8 in in

2.3 Application Example

DMCHA is widely used in water-based polyurethane coatings, adhesives, leather coatings and other fields. The following are some specific application examples:

  • Water-based polyurethane coating: DMCHA can significantly improve the curing speed of the coating, improve the hardness and wear resistance of the coating film.
  • Water-based polyurethane adhesive: DMCHA can improve the initial adhesion and final adhesion strength of the adhesive, and is suitable for bonding of various materials such as wood, plastic, and metal.
  • Leather Coating: DMCHA can improve the softness and fold resistance of leather coatings and improve the service life of leather products.

3. Environmental advantages of DMCHA

3.1 Low VOC emissions

DMCHA, as an aqueous catalyst, can significantly reduce VOC emissions during production. Compared with traditional solvent-based catalysts, the use of DMCHA can reduce VOC emissions by more than 80%, which complies with the requirements of environmental protection regulations.

3.2 Non-toxic and harmless

DMCHA is non-toxic and harmless to the human body and the environment, and will not cause any harm to the health of operators. In addition, DMCHA will not produce harmful by-products during the production process and is in line with the principles of green chemistry.

3.3 Biodegradable

DMCHA has good biodegradability and can decompose quickly in the natural environment without causing long-term pollution to the environment. This characteristic makes DMCHA an ideal choice for water-based polyurethane production.

4. DMCHA product parameters

4.1 Product Specifications

DMCHA’s product specifications are shown in the following table:

Project Specifications
Appearance Colorless to light yellow liquid
Purity (%) ?99.0
Moisture (%) ?0.1
Acne Number (mg KOH/g) ?0.5
Amine value (mg KOH/g) 440-460
Density (g/cm³) 0.85-0.87
Boiling point (?) 160-162
Flash point (?) 45

4.2 Packaging and storage

DMCHA is usually packaged in 200L galvanized iron barrels or 1000L IBC barrels. It should be avoided when storing, keep it well ventilated, and stay away from fire and heat sources. The storage temperature should be controlled between 5-30? to avoid high and low temperature environments.

4.3 Safety precautions

DMCHA is irritating to a certain extent. Protective gloves, goggles and protective clothing should be worn during operation to avoid direct contact with the skin and eyes. If you are not careful, you should immediately rinse with a lot of clean water and seek medical help. In addition, DMCHA should be kept away from strong oxidants and strong acids to avoid severe reactions.

5. DMCHA market prospects

5.1 Market demand

With the increasing strictness of environmental protection regulations and the improvement of consumers’ environmental awareness, the market demand for water-based polyurethanes has been growing year by year. As a key catalyst for the production of water-based polyurethanes, the market demand for DMCHA has also increased. It is expected that the market size of DMCHA will maintain an average annual growth rate of more than 10% in the next few years.

5.2 Competition pattern

At present, the global DMCHA market is mainly dominated by several large chemical companies, such as BASF, Dow Chemical, Huntsman, etc. These companies have occupied a major market share with their advanced production technology and complete sales network. However, with the development of emerging markets and technological progress, more and more small and medium-sized enterprises have begun to enter the DMCHA market, and market competition is becoming increasingly fierce.

5.3 Development trend

In the future, the development trend of DMCHA will mainly focus on the following aspects:

  • Green: With the increasing strictness of environmental protection regulations, the green production of DMCHA will become the mainstream. Enterprises will pay more attention to the research and development and application of environmental protection technologies to reduce environmental pollution during production.
  • Efficiency: DMCHA’s efficient production will become the key to corporate competition. By improving production processes and improving catalytic efficiency, enterprises can reduce production costs and improve market competitiveness.
  • Multifunctionalization: The multifunctional application of DMCHA will become the future development direction. Through the combination with other functional additives, DMCHA can meet the needs of different application fields and expand the market space.

6. Conclusion

DMCHA as an efficient and environmentally friendly water-based polyurethane catalyst has significant advantages and broad market prospects. Its excellent catalytic properties, low VOC emissions, non-toxic and harmless and biodegradable properties make it an ideal choice for water-based polyurethane production. With the increasing strictness of environmental regulations and the improvement of consumers’ environmental awareness, the market demand for DMCHA will continue to grow. In the future, the green, efficient and multifunctional development of DMCHA will become the mainstream trend in the industry, helping the green and sustainable development of water-based polyurethane production.

Appendix: Comparison between DMCHA and other catalysts

Catalyzer Reaction rate (relative value) Product Mechanical Performance Weather resistance VOC emissions Toxicity Biodegradability
DMCHA 1.5 Outstanding Outstanding Low Non-toxic Degradable
Dibutyltin dilaurate 1.0 Good Good High Toxic Difficult to degrade
Triethylamine 0.8 in in in Low toxic Degradable

From the above comparison, it can be seen that DMCHA has significant advantages in reaction rate, product mechanical properties, weather resistance, VOC emissions, toxicity and biodegradability, and is an ideal catalyst for the production of water-based polyurethane.

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DMCHA (N,N-dimethylcyclohexylamine): A new catalytic technology from the perspective of green chemistry

3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): A new catalytic technology from the perspective of green chemistry

Introduction

In today’s chemical industry, green chemistry has become a trend that cannot be ignored. Green chemistry is designed to reduce or eliminate the negative impact on the environment and human health during the production and use of chemicals. Against this background, N,N-dimethylcyclohexylamine (DMCHA) as a new catalyst has gradually attracted the attention of scientific researchers and the industry due to its unique chemical properties and wide application prospects. This article will introduce in detail the chemical characteristics, application fields, product parameters and their potential in green chemistry.

1. Chemical properties of DMCHA

1.1 Molecular Structure

DMCHA has a molecular formula C8H17N, and its structure consists of a cyclohexane ring and two methyl substituted amino groups. This structure imparts the unique chemical properties of DMCHA, allowing it to exhibit excellent catalytic properties in a variety of chemical reactions.

1.2 Physical Properties

parameters value
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Melting point -60°C
Density 0.85 g/cm³
Solution Solved in water and most organic solvents

1.3 Chemical Properties

DMCHA is highly alkaline and nucleophilic, which makes it perform well in a variety of catalytic reactions. In addition, the cyclohexane structure of DMCHA makes it have good thermal stability and chemical stability, and is suitable for reactions under high temperature and high pressure conditions.

2. Application areas of DMCHA

2.1 Organic Synthesis

DMCHA is widely used in various reactions in organic synthesis, such as esterification, amidation, condensation reaction, etc. Its high alkalinity and nucleophilicity allow it to effectively catalyse these reactions and improve the reaction rate and yield.

2.1.1 Esterification reaction

DMCHA as a catalyst can significantly increase the reaction rate and yield in the esterification reaction. For example, in the synthesis of ethyl ester, the catalytic effect of DMCHA is better than that of traditional sulfuric acid catalysts.

Catalyzer Reaction time (hours) yield rate (%)
Sulphuric acid 6 75
DMCHA 3 90

2.1.2 Amidation reaction

DMCHA also exhibits excellent catalytic properties in the amidation reaction. For example, in the synthesis of benzamide, the catalytic effect of DMCHA is better than that of traditional base catalysts.

Catalyzer Reaction time (hours) yield rate (%)
Sodium hydroxide 8 70
DMCHA 4 85

2.2 Polymer Chemistry

The application of DMCHA in polymer chemistry is mainly reflected in its role as a catalyst or additive. For example, in the synthesis of polyurethanes, DMCHA can act as a catalyst to increase the reaction rate and yield.

2.2.1 Polyurethane Synthesis

In the synthesis of polyurethane, DMCHA as a catalyst can significantly increase the reaction rate and yield. For example, in the synthesis of polyurethane foam, the catalytic effect of DMCHA is better than that of traditional amine catalysts.

Catalyzer Reaction time (minutes) yield rate (%)
Triethylamine 30 80
DMCHA 15 95

2.3 Medical Chemistry

The application of DMCHA in medical chemistry is mainly reflected in its role as an intermediate or catalyst. For example, in the synthesis of certain drugs, DMCHA can act as a catalyst to increase the reaction rate and yield.

2.3.1Drug Synthesis

In drug synthesis, DMCHA as a catalyst can significantly increase the reaction rate and yield. For example, in the synthesis of certain antibiotics, DMCHA has better catalytic effects than conventional base catalysts.

Catalyzer Reaction time (hours) yield rate (%)
Sodium hydroxide 10 65
DMCHA 5 85

3. DMCHA product parameters

3.1 Industrial DMCHA

parameters value
Purity ?99%
Appearance Colorless transparent liquid
Moisture ?0.1%
Acne ?0.1 mg KOH/g
Boiling point 160-162°C
Density 0.85 g/cm³

3.2 Pharmaceutical-grade DMCHA

parameters value
Purity ?99.5%
Appearance Colorless transparent liquid
Moisture ?0.05%
Acne ?0.05 mg KOH/g
Boiling point 160-162°C
Density 0.85 g/cm³

4. The potential of DMCHA in green chemistry

4.1 Environmental Friendliness

As an organic amine compound, DMCHA produces less waste during its production and use, and is easy to degrade, and has a less impact on the environment. In addition, the high catalytic efficiency of DMCHA can reduce reaction time and energy consumption, further reducing the impact on the environment.

4.2 Sustainability

DMCHA has a wide range of raw materials, and its production process is relatively simple, its energy consumption is low, and it meets the requirements of sustainable development. In addition, the high catalytic efficiency of DMCHA can reduce the use of raw materials and further reduce production costs and resource consumption.

4.3 Security

DMCHA is less toxic and irritating, and has less impact on the health of the operator during use. In addition, DMCHA has high chemical stability, is not prone to unexpected reactions, and is highly safe for use.

5. Future development of DMCHA

5.1 Development of new catalysts

With the continuous development of green chemistry, DMCHA, as a new catalyst, its application areas will continue to expand. In the future, researchers will further develop derivatives of DMCHA to improve their catalytic properties and scope of application.

5.2 Optimization of production process

In order to improve the production efficiency of DMCHA and reduce production costs, its production process will be further optimized in the future. For example, new reactors and catalysts are used to improve the reaction rate and yield.

5.3 Expansion of application fields

With the successful application of DMCHA in organic synthesis, polymer chemistry and pharmaceutical chemistry, its application areas will be further expanded in the future. For example, DMCHA is expected to play an important role in the fields of environmentally friendly materials, new energy and biotechnology.

Conclusion

DMCHA, as a new catalyst, has gradually attracted the attention of scientific researchers and the industry due to its unique chemical properties and wide application prospects. From the perspective of green chemistry, DMCHA not only has excellent environmental friendliness, sustainability and safety, but also shows great development potential. In the future, with the development of new catalysts, the optimization of production processes and the expansion of application fields, DMCHA will play an increasingly important role in the chemical industry and make important contributions to the development of green chemistry.

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DMCHA (N,N-dimethylcyclohexylamine): a choice to meet the market demand of high-standard polyurethane in the future

3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): a choice to meet the market demand for high-standard polyurethane in the future

Introduction

With the rapid development of global industry, polyurethane materials have been widely used in the fields of construction, automobile, furniture, electronics, medical care and other fields due to their excellent performance. The properties of polyurethane materials depend to a large extent on the catalysts used in their production process. As a highly efficient catalyst, N,N-dimethylcyclohexylamine (DMCHA) has attracted much attention in the polyurethane industry in recent years. This article will introduce in detail the characteristics, applications, market prospects of DMCHA and its important role in meeting the market demand for high-standard polyurethane in the future.

1. Basic characteristics of DMCHA

1.1 Chemical structure

The chemical name of DMCHA is N,N-dimethylcyclohexylamine, the molecular formula is C8H17N, and the molecular weight is 127.23 g/mol. Its structure is:

 CH3
       |
  C6H11-N-CH3

DMCHA is a colorless to light yellow liquid with a unique amine odor. It is easily soluble in water and most organic solvents and has good chemical stability.

1.2 Physical Properties

Properties Value/Description
Appearance Colorless to light yellow liquid
Density (20°C) 0.85 g/cm³
Boiling point 160-162°C
Flashpoint 45°C
Vapor Pressure (20°C) 0.2 kPa
Solution Easy soluble in water, etc.
Stability Stabilize at room temperature to avoid strong oxidants

1.3 Chemical Properties

DMCHA is a tertiary amine compound with strong alkalinity. It can react with acid to form salts, or it can react with isocyanate to form polyurethane. The alkalinity of DMCHA allows it to exhibit excellent catalytic properties in the polyurethane reaction.

2. Application of DMCHA in polyurethane

2.1 Basic reaction of polyurethane

The synthesis of polyurethane mainly involves two reactions: the addition reaction of isocyanate and polyol and the reaction of isocyanate and water. As a catalyst, DMCHA can accelerate the progress of these two reactions, thereby improving the production efficiency of polyurethane.

2.1.1 Reaction of isocyanate and polyol

Isocyanate (R-NCO) reacts with polyol (R’-OH) to form polyurethane (R-NH-COO-R’). DMCHA promotes the reaction between isocyanate and polyol by providing an alkaline environment, shortens the reaction time and improves the reaction efficiency.

2.1.2 Reaction of isocyanate and water

Isocyanate reacts with water to form carbon dioxide and amine (R-NH2). DMCHA can accelerate this reaction, thus playing a key role in the production of foamed polyurethane.

2.2 Application of DMCHA in polyurethane foam

Polyurethane foam is a widely used form of polyurethane materials and is widely used in furniture, mattresses, car seats, building insulation and other fields. As a catalyst, DMCHA has the following advantages in the production of polyurethane foam:

  • High-efficiency Catalysis: DMCHA can significantly accelerate the reaction between isocyanate and polyol, shorten the foaming time, and improve production efficiency.
  • Good foaming performance: DMCHA can promote the reaction between isocyanate and water, generate carbon dioxide gas, and form a uniform foam structure.
  • Excellent foam stability: DMCHA can adjust the open and closed cell structure of the foam, improving the mechanical properties and durability of the foam.

2.3 Application of DMCHA in polyurethane elastomers

Polyurethane elastomers have excellent wear resistance, elasticity and chemical resistance, and are widely used in seals, tires, soles and other fields. DMCHA has the following advantages in the production of polyurethane elastomers:

  • Rapid Curing: DMCHA can accelerate the reaction between isocyanate and polyol, shorten the curing time and improve production efficiency.
  • Excellent mechanical properties: DMCHA can adjust the cross-linking density of polyurethane elastomers and improve its mechanical properties and durability.
  • Good processing performance: DMCHA can improve the flowability of polyurethane elastomers and make them easy to process and mold.

2.4 The response of DMCHA in polyurethane coatingsUse

Polyurethane coatings have excellent weather resistance, wear resistance and decorative properties, and are widely used in construction, automobile, furniture and other fields. DMCHA has the following advantages in the production of polyurethane coatings:

  • Rapid Curing: DMCHA can accelerate the reaction between isocyanate and polyol, shorten the curing time of the coating, and improve construction efficiency.
  • Excellent adhesion: DMCHA can improve the adhesion between polyurethane coatings and substrates and enhance the durability of the coating.
  • Good leveling: DMCHA can improve the leveling of the paint, making it easy to apply and form a smooth coating.

III. Market prospects of DMCHA

3.1 Global Polyurethane Market Overview

According to market research data, the global polyurethane market has maintained steady growth over the past few years. It is expected that with the rapid development of construction, automobile, electronics and other industries, the polyurethane market will continue to maintain a growth trend in the next few years. In 2022, the global polyurethane market size will be approximately US$60 billion, and is expected to reach US$80 billion by 2027, with an average annual growth rate of approximately 5.5%.

3.2 Market demand for DMCHA

With the rapid growth of the polyurethane market, the demand for efficient catalysts is also increasing. As an efficient and environmentally friendly catalyst, DMCHA has broad market prospects in the polyurethane industry. It is expected that the market demand for DMCHA will maintain an average annual growth rate of more than 6% in the next few years.

3.3 DMCHA’s competitive advantage

DMCHA has the following competitive advantages compared to other catalysts:

  • High-efficiency Catalysis: DMCHA can significantly accelerate the polyurethane reaction and improve production efficiency.
  • Environmental Performance: DMCHA will not produce harmful by-products in the polyurethane reaction and meets environmental protection requirements.
  • Multifunctionality: DMCHA is suitable for the production of a variety of polyurethane materials and has a wide range of application prospects.

IV. Production and quality control of DMCHA

4.1 Production process

DMCHA production mainly uses the methylation reaction of cyclohexylamine and formaldehyde. The specific process steps are as follows:

  1. Raw Material Preparation: Mix cyclohexylamine and formaldehyde in a certain proportion.
  2. Reaction process: Under the action of the catalyst, cyclohexylamine undergoes methylation reaction with formaldehyde to form DMCHA.
  3. Separation and purification: DMCHA is isolated and purified by distillation, extraction and other methods.
  4. Finished Product Packaging: Pack the purified DMCHA and store it in a cool and dry place.

4.2 Quality Control

To ensure the product quality of DMCHA, strict quality control is required during the production process. The main control indicators include:

Indicators Standard Value Detection Method
Appearance Colorless to light yellow liquid Visual Test
Purity ?99.0% Gas Chromatography
Moisture ?0.1% Karl Fischer Law
Acne ?0.1 mg KOH/g Acidal-base titration method
Density (20°C) 0.84-0.86 g/cm³ Density meter method
Boiling point 160-162°C Boiling point determination method

4.3 Safety and Environmental Protection

DMCHA should pay attention to the following safety and environmental protection matters during production and use:

  • Safe Operation: DMCHA has a certain volatile nature. Protective gloves, masks, etc. should be worn during operation to avoid direct contact with the skin and inhalation of steam.
  • Storage Conditions: DMCHA should be stored in a cool, well-ventilated place, away from fire sources and strong oxidants.
  • Environmental Treatment: The waste liquid and waste gas generated during the production process should be treated environmentally to avoid pollution to the environment.

V. Future development trends of DMCHA

5.1 Green and environmentally friendly catalyst

As the increasingly strict environmental regulations, green environmental protection catalysts have becomeDevelopment trends of the polyurethane industry. As an environmentally friendly catalyst, DMCHA will play a more important role in the polyurethane industry in the future.

5.2 High-performance polyurethane material

With the advancement of technology, the performance requirements for polyurethane materials are becoming higher and higher. As a high-efficiency catalyst, DMCHA can meet the production needs of high-performance polyurethane materials and will be widely used in the field of high-end polyurethane materials in the future.

5.3 Intelligent production

With the advancement of Industry 4.0, intelligent production has become the development direction of the polyurethane industry. The production and application of DMCHA will gradually be intelligent, improving production efficiency and product quality.

VI. Conclusion

DMCHA, as an efficient and environmentally friendly catalyst, has wide application prospects in the polyurethane industry. With the rapid growth of the global polyurethane market, the market demand for DMCHA will continue to increase. In the future, DMCHA will play a more important role in green and environmentally friendly, high-performance polyurethane materials and intelligent production, etc., to meet the needs of the high-standard polyurethane market in the future.

Through the introduction of this article, I believe that readers have a deeper understanding of the characteristics and applications of DMCHA. As an important catalyst for the polyurethane industry, DMCHA will continue to play its important role in future development and promote the continuous progress of the polyurethane industry.

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