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The role of DMCHA in rapid curing polyurethane systems

3月 9th, 2025 News

The role of DMCHA in rapid curing polyurethane systems

Catalog

  1. Introduction
  2. Overview of polyurethane system
  3. The basic properties of DMCHA
  4. Mechanism of action of DMCHA in polyurethane systems
  5. The influence of DMCHA on the performance of polyurethane systems
  6. DMCHA application examples
  7. DMCHA product parameters
  8. Conclusion

1. Introduction

Polyurethane (PU) is a polymer material widely used in coatings, adhesives, elastomers, foam plastics and other fields. It has excellent performance and a wide range of applications, but in practical applications, rapid curing is an important requirement. Rapid curing not only improves production efficiency, but also reduces energy consumption and costs. Dimethylcyclohexylamine (DMCHA) plays an important role in the rapid curing of polyurethane systems as an efficient catalyst. This article will discuss in detail the role, mechanism and its impact on system performance in the rapid curing polyurethane system.

2. Overview of polyurethane system

Polyurethane is a polymer compound produced by addition polymerization reaction of polyols and polyisocyanates. The reaction process mainly includes the following steps:

  1. Prepolymer formation: Polyol reacts with polyisocyanate to form prepolymers.
  2. Channel Growth: The prepolymer further reacts with polyols or amine chain extenders to form a long-chain polymer.
  3. Crosslinking reaction: Through the action of the crosslinking agent, a three-dimensional network structure is formed, which imparts excellent mechanical properties to the material.

The properties of polyurethane depend on its chemical structure, molecular weight, crosslink density and other factors. Rapid curing polyurethane systems often require efficient catalysts to accelerate the reaction process.

3. Basic properties of DMCHA

DMCHA is an organic amine compound with the chemical formula C8H17N and a molecular weight of 127.23 g/mol. Its structure contains two methyl groups and one cyclohexyl group, which has the following basic properties:

  • Appearance: Colorless to light yellow liquid
  • Boiling point: about 180°C
  • Density: 0.85 g/cm³
  • <Solubility: easily soluble in organic solvents, such as alcohols, ethers, ketones, etc.
  • Stability: Stable at room temperature, but may decompose under high temperature or strong acid and alkali conditions

DMCHA is a highly efficient catalyst and is widely used in the curing reaction of polyurethane, epoxy resin and other systems.

4. Mechanism of action of DMCHA in polyurethane system

The mechanism of action of DMCHA in polyurethane systems mainly includes the following aspects:

4.1 Catalyzing the reaction of isocyanate and hydroxyl groups

DMCHA can significantly accelerate the reaction of isocyanate (-NCO) and hydroxyl (-OH) to form a carbamate (-NHCOO-) bond. Its catalytic effect is mainly achieved through the following steps:

  1. Activated isocyanate: The nitrogen atom in DMCHA has a lone pair of electrons and can form coordination bonds with the carbon atoms in isocyanate to activate isocyanate.
  2. Promote nucleophilic addition: Activated isocyanates are more likely to undergo nucleophilic addition reaction with hydroxyl groups to form carbamate bonds.

4.2 Catalyzing the reaction of isocyanate with water

In the preparation of polyurethane foam, water is often used as a foaming agent. DMCHA can catalyze the reaction of isocyanate with water to form carbon dioxide gas, thereby achieving foaming. The reaction process is as follows:

  1. Isocyanate reacts with water to form carbamic acid: R-NCO + H2O ? R-NHCOOH
  2. Carbamic acid decomposes to form carbon dioxide and amines: R-NHCOOH ? R-NH2 + CO2

DMCHA accelerates the above reactions and promotes the formation and curing of foams.

4.3 Adjust the reaction rate

The catalytic activity of DMCHA can be adjusted by its concentration and reaction conditions. Appropriately increasing the concentration of DMCHA can significantly increase the reaction rate, but excessive concentrations may lead to excessive reaction and affect the performance of the material. Therefore, in practical applications, the dosage of DMCHA needs to be adjusted according to specific needs.

5. Effect of DMCHA on the performance of polyurethane systems

DMCHA as a catalyst has an important influence on the performance of the polyurethane system. The following is a detailed analysis from several aspects:

5.1 Curing time

DMCHA can significantly shorten the curing time of the polyurethane system. By adjusting DMThe amount of CHA can achieve curing time ranging from minutes to hours. The following table lists the curing time at different DMCHA concentrations:

DMCHA concentration (wt%) Currecting time (min)
0.1 120
0.5 60
1.0 30
2.0 15

5.2 Mechanical Properties

DMCHA also has a significant impact on the mechanical properties of polyurethane systems. A proper amount of DMCHA can improve the tensile strength, elongation of break and hardness of the material. The following table lists the mechanical performance data at different DMCHA concentrations:

DMCHA concentration (wt%) Tension Strength (MPa) Elongation of Break (%) Shore A
0.1 10 300 70
0.5 12 350 75
1.0 15 400 80
2.0 18 450 85

5.3 Thermal Stability

DMCHA also has a certain influence on the thermal stability of the polyurethane system. A moderate amount of DMCHA can increase the thermal decomposition temperature of the material, but excessive concentrations may lead to a decrease in thermal stability. The following table lists the thermal decomposition temperatures at different DMCHA concentrations:

DMCHA concentration (wt%) Thermal decomposition temperature (°C)
0.1 250
0.5 260
1.0 270
2.0 260

5.4 Foaming performance

In the preparation of polyurethane foam, DMCHA has a significant impact on foaming performance. A proper amount of DMCHA can promote the formation of carbon dioxide and improve the density and uniformity of the foam. The following table lists the foam density at different DMCHA concentrations:

DMCHA concentration (wt%) Foam density (kg/m³)
0.1 30
0.5 35
1.0 40
2.0 45

6. Application examples of DMCHA

DMCHA is widely used in rapid curing polyurethane systems. Here are a few typical application examples:

6.1 Polyurethane coating

In polyurethane coatings, DMCHA as a catalyst can significantly shorten the curing time of the coating, improve the hardness and wear resistance of the coating. For example, in automotive coatings, the use of DMCHA can allow the coating to dry in minutes and completely cure within a few hours, greatly improving production efficiency.

6.2 Polyurethane Adhesive

In polyurethane adhesives, DMCHA can accelerate the curing process of the adhesive and improve the bonding strength. For example, in wood processing, the use of DMCHA can enable the adhesive to achieve high-strength bonding in a short time, reducing the production cycle.

6.3 Polyurethane foam

In the preparation of polyurethane foam, DMCHA as a foaming catalyst can promote the formation of carbon dioxide and improve the density and uniformity of the foam. For example, in furniture manufacturing, the use of DMCHA can enable foam to achieve the desired density and hardness in a short time, improving product quality and production efficiency.

7. DMCHA product parameters

The following are typical product parameters of DMCHA:

Parameters value
Chemical formula C8H17N
Molecular Weight 127.23 g/mol
Appearance Colorless to light yellow liquid
Boiling point 180°C
Density 0.85 g/cm³
Solution Easy soluble in organic solvents
Stability Stable at room temperature
Recommended dosage 0.1-2.0 wt%

8. Conclusion

DMCHA, as an efficient catalyst, plays an important role in the rapid curing of polyurethane systems. By catalyzing the reaction of isocyanate with hydroxyl groups and water, it significantly shortens the curing time and improves the mechanical properties, thermal stability and foaming properties of the material. In practical applications, the dosage of DMCHA needs to be adjusted according to specific needs to achieve optimal performance and effect. By rationally using DMCHA, the production efficiency and application performance of the polyurethane system can be significantly improved and the needs of different fields can be met.

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How DMCHA helps reduce energy consumption in polyurethane production

3月 9th, 2025 News

DMCHA application in polyurethane production and its contribution to energy consumption reduction

Introduction

Polyurethane (PU) is a polymer material widely used in the fields of construction, automobile, furniture, shoe materials, etc. Energy consumption is an important consideration during its production process. With the global emphasis on energy conservation and emission reduction, how to reduce energy consumption in polyurethane production has become the focus of industry attention. DMCHA (N,N-dimethylcyclohexylamine) plays an important role in polyurethane production as an efficient catalyst. This article will discuss in detail how DMCHA can help reduce the energy consumption of polyurethane production, and introduce its product parameters, application examples and future development trends.

1. Energy consumption problems in polyurethane production

1.1 Basic process of polyurethane production

The production of polyurethane mainly includes the following steps:

  1. Raw material preparation: including polyols, isocyanates, catalysts, foaming agents, etc.
  2. Mix and Reaction: Mix the raw materials in proportion to form polyurethane through chemical reactions.
  3. Modeling and Curing: The reaction mixture is injected into the mold, and after a certain period of time of curing, the final product is formed.

1.2 Main sources of energy consumption

In the polyurethane production process, energy consumption mainly comes from the following aspects:

  1. Raw Material Heating: Polyols and isocyanate need to be heated to a certain temperature before reaction.
  2. Reaction Exothermic: Polyurethane reaction is an exothermic reaction, but a certain amount of energy is required to start the reaction in the early stage.
  3. Equipment Operation: The operation of hybrid equipment, conveying equipment, mold heating and other equipment requires a large amount of electricity.
  4. Cooling and Curing: The reaction product needs to be cooled and cured, and this process also requires energy consumption.

1.3 Challenges of energy consumption

With the rise in global energy prices and the increase in environmental protection requirements, energy consumption problems in polyurethane production are becoming increasingly prominent. Reducing energy consumption can not only reduce production costs, but also reduce carbon emissions, which meets the requirements of sustainable development.

2. Basic characteristics of DMCHA and its application in polyurethane production

2.1 Basic characteristics of DMCHA

DMCHA (N,N-dimethylcyclohexylamine) is a highly efficient polyurethane catalyst withThe following characteristics:

  1. High-efficiency Catalysis: DMCHA can significantly accelerate the polyurethane reaction and shorten the reaction time.
  2. Low Volatility: DMCHA has low volatility, reducing volatile losses during production.
  3. Good stability: DMCHA has good stability at high temperatures and is not easy to decompose.
  4. Environmentality: DMCHA is environmentally friendly and meets environmental protection requirements.

2.2 Application of DMCHA in polyurethane production

The application of DMCHA in polyurethane production is mainly reflected in the following aspects:

  1. Catalytic: DMCHA, as a catalyst, can accelerate the reaction between polyols and isocyanates, shorten the reaction time, and reduce energy consumption.
  2. Foaming Agent: DMCHA can act as a foaming agent to help polyurethane materials form a uniform foam structure.
  3. Stabler: DMCHA can stabilize the temperature during the polyurethane reaction and prevent the reaction from being overheated or overcooled.

III. How DMCHA helps reduce energy consumption in polyurethane production

3.1 Shorten the reaction time

DMCHA as a high-efficiency catalyst can significantly shorten the time of polyurethane reaction. The shortening of reaction time means a reduction in equipment operation time, thereby reducing power consumption. Specifically, the catalytic action of DMCHA accelerates the reaction rate of polyols and isocyanates, reducing the energy input demand in the early stage of the reaction.

3.2 Reduce the reaction temperature

The catalytic effect of DMCHA is not only reflected in the reaction speed, but also in the reduction of the reaction temperature. By using DMCHA, the polyurethane reaction can be carried out at lower temperatures, reducing the energy required for heating of the feedstock. In addition, the reduction in reaction temperature also reduces energy consumption during cooling.

3.3 Improve reaction efficiency

The efficient catalytic action of DMCHA makes the polyurethane reaction more thorough and reduces the waste of unreacted raw materials. This not only reduces raw material costs, but also reduces energy consumption during subsequent processing. For example, unreacted raw materials need to be recycled and processed, which requires a large amount of energy consumption.

3.4 Reduce device running time

DMCHA shortens the reaction time, and the equipment operation time is also reduced. The reduction in equipment operation time directly reduces power consumption. For example, hybrid equipment,The operating time of the delivery equipment, mold heating equipment, etc. is reduced, and the power consumption is also reduced.

3.5 Optimize foaming process

DMCHA as a foaming agent can help the polyurethane material form a uniform foam structure. The uniform foam structure not only improves the quality of the product, but also reduces energy consumption during the foaming process. For example, a uniform foam structure reduces the amount of foaming agent used and reduces the energy demand during foaming.

IV. DMCHA product parameters and its impact on energy consumption reduction

4.1 Product parameters of DMCHA

The following are the main product parameters of DMCHA:

parameter name parameter value
Chemical Name N,N-dimethylcyclohexylamine
Molecular formula C8H17N
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Density 0.85 g/cm³
Flashpoint 45°C
Solution Solved in water and organic solvents
Catalytic Efficiency Efficient
Volatility Low
Stability High temperature stable
Environmental Environmental

4.2 Effect of DMCHA on energy consumption reduction

DMCHA product parameters have an important impact on its energy consumption reduction in polyurethane production. Specifically:

  1. High-efficiency Catalysis: The efficient catalysis of DMCHA shortens reaction time, reduces equipment operation time, and reduces electricity consumption.
  2. Low Volatility: The low volatility of DMCHA reduces volatile losses in the production process, reduces raw material waste, and reduces energy consumption in subsequent processing.
  3. High temperature stability: The high temperature stability of DMCHA makes it difficult to decompose at high temperatures, reducing energy loss during the reaction.
  4. Environmentality: DMCHA’s environmental protection meets the requirements of sustainable development, reduces environmental pollution during production and reduces energy consumption required for environmental protection treatment.

V. Examples of application of DMCHA in actual production

5.1 Application in the production of building insulation materials

In the production of building insulation materials, DMCHA can significantly reduce energy consumption during the production process as a catalyst and foaming agent. For example, after using DMCHA, a building insulation material manufacturer shortened the reaction time by 30%, the equipment operation time by 20%, and the electricity consumption by 15%.

5.2 Application in car seat production

In the production of car seats, DMCHA as a catalyst can accelerate the polyurethane reaction and shorten the production cycle. For example, after using DMCHA, a car seat manufacturer shortened the reaction time by 25%, the equipment operation time by 18%, and the electricity consumption by 12%.

5.3 Application in furniture production

In furniture production, DMCHA can improve production efficiency and reduce energy consumption as a catalyst and foaming agent. For example, after using DMCHA, a furniture manufacturer shortened the reaction time by 20%, the equipment operation time by 15%, and the electricity consumption by 10%.

VI. Future development trends of DMCHA

6.1 Research and development of high-efficiency catalysts

With the continuous development of the polyurethane industry, the demand for efficient catalysts is increasing. In the future, DMCHA will pay more attention to the development of efficient catalysts to further reduce energy consumption in polyurethane production.

6.2 Promotion of environmentally friendly catalysts

Environmental-friendly catalysts are the development trend of the polyurethane industry in the future. As an environmentally friendly catalyst, DMCHA will be widely used in the future. In the future, DMCHA will pay more attention to improving environmental protection performance to meet increasingly stringent environmental protection requirements.

6.3 Application of intelligent production

With the promotion of intelligent production, the application of DMCHA in polyurethane production will be more intelligent. In the future, DMCHA will pay more attention to the application of intelligent production to improve production efficiency and reduce energy consumption.

7. Conclusion

DMCHA, as an efficient polyurethane catalyst, plays an important role in polyurethane production. DMCHA is significant by shortening reaction time, reducing reaction temperature, improving reaction efficiency, reducing equipment operation time and optimizing foaming processReduces energy consumption in polyurethane production. In the future, with the continuous development of high-efficiency catalysts, environmentally friendly catalysts and intelligent production, DMCHA will be more widely used in polyurethane production, making greater contributions to the sustainable development of the polyurethane industry.

Appendix: Comparison table of energy consumption reduction effects of DMCHA in polyurethane production

Production link Power consumption before using DMCHA Energy consumption after using DMCHA Percentage of energy consumption reduction
Raw Material Heating 100 kWh 80 kWh 20%
Reaction exothermic 150 kWh 120 kWh 20%
Equipment operation 200 kWh 160 kWh 20%
Cooling and Curing 100 kWh 80 kWh 20%
Total 550 kWh 440 kWh 20%

From the above comparison table, we can see that DMCHA has significant energy consumption reduction effect in polyurethane production, making an important contribution to energy conservation and emission reduction in the polyurethane industry.

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DMCHA: The ideal catalyst for a variety of polyurethane formulations

3月 9th, 2025 News

DMCHA: Ideal catalyst for a variety of polyurethane formulations

Introduction

Polyurethane (PU) is a multifunctional polymer material widely used in construction, automobile, furniture, shoe materials, packaging and other fields. Its excellent physical properties and chemical stability make it one of the indispensable materials in modern industry. However, the properties of polyurethanes depend heavily on the catalysts in their formulation. The catalyst not only affects the reaction rate of the polyurethane, but also determines the physical properties and chemical stability of the final product. Among many catalysts, DMCHA (N,N-dimethylcyclohexylamine) has become an ideal choice in polyurethane formulations due to its excellent catalytic properties and wide applicability.

This article will introduce the characteristics, application areas, product parameters and their advantages in polyurethane formulation in detail, helping readers to fully understand this important catalyst.

1. Basic characteristics of DMCHA

1.1 Chemical structure

The chemical name of DMCHA is N,N-dimethylcyclohexylamine, and its molecular formula is C8H17N. It is a colorless to light yellow liquid with a unique odor of amine compounds. The molecular structure of DMCHA contains two methyl groups and one cyclohexyl group, which gives it unique chemical properties.

1.2 Physical Properties

parameters value
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Density 0.85 g/cm³
Flashpoint 45°C
Solution Easy soluble in water and organic solvents
Steam Pressure 0.5 mmHg at 20°C

1.3 Chemical Properties

DMCHA is a strongly basic amine compound with high reactivity. It can react with isocyanate (NCO) groups to form carbamate bonds, thereby promoting the formation of polyurethane. In addition, DMCHA can react with other acidic or neutral compounds and exhibit good chemical stability.

2. Application of DMCHA in polyurethane formulations

2.1 Polyurethane shapeMechanism

The formation of polyurethane is mainly dependent on the reaction between isocyanate and polyol. This reaction usually requires a catalyst to accelerate the reaction rate and control the selectivity of the reaction. As a highly efficient catalyst, DMCHA can promote the reaction between isocyanate and polyol at lower temperatures to form high-quality polyurethane.

2.2 Catalytic action of DMCHA

The catalytic effect of DMCHA is mainly reflected in the following aspects:

  1. Accelerating the reaction rate: DMCHA can significantly increase the reaction rate between isocyanate and polyol, shorten the reaction time, and improve production efficiency.
  2. Control reaction selectivity: DMCHA can selectively promote the reaction between isocyanate and polyol, reduce the occurrence of side reactions, and improve the purity of the product.
  3. Improving product performance: DMCHA can optimize the molecular structure of polyurethane and improve the physical and chemical stability of the product.

2.3 Application Areas

DMCHA is widely used in the following polyurethane formulations:

  1. Rigid Foam: DMCHA is particularly well-known in rigid polyurethane foams. It can promote the reaction of isocyanate with polyols, and produce high-density rigid foams, with excellent thermal insulation properties and mechanical strength.
  2. Soft Foam: In soft polyurethane foam, DMCHA can adjust the elasticity and softness of the foam, making it suitable for furniture, mattresses and other products.
  3. Coatings and Adhesives: DMCHA is also widely used in polyurethane coatings and adhesives. It can improve the adhesion and wear resistance of the paint and enhance the adhesive strength.
  4. Elastomer: The application of DMCHA in polyurethane elastomers can improve the elasticity and durability of products, and is suitable for automotive parts, shoe materials and other fields.

III. Product parameters of DMCHA

3.1 Product Specifications

parameters value
Appearance Colorless to light yellow liquid
Purity ?99%
Moisture content ?0.1%
Acne ?0.1 mg KOH/g
Amine Value 440-460 mg KOH/g
Flashpoint 45°C
Density 0.85 g/cm³
Boiling point 160-162°C

3.2 Storage and Transport

DMCHA should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures. Sealed containers should be used during transportation to prevent leakage and contamination. The storage period of DMCHA is generally 12 months, and its performance should be retested after the period exceeds.

3.3 Safety precautions

DMCHA is a strongly alkaline compound that has certain corrosion and irritation. Protective gloves, goggles and protective clothing should be worn during use 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.

IV. Advantages of DMCHA in polyurethane formulations

4.1 High-efficiency Catalysis

DMCHA has high efficiency catalytic properties and can promote the reaction between isocyanate and polyol at lower temperatures, significantly shorten the reaction time and improve production efficiency.

4.2 Wide applicability

DMCHA is suitable for a variety of polyurethane formulations, including rigid foams, soft foams, coatings, adhesives and elastomers. Its wide applicability makes it an ideal catalyst in the polyurethane industry.

4.3 Optimize product performance

DMCHA can optimize the molecular structure of polyurethane and improve the physical properties and chemical stability of the product. For example, in rigid foam, DMCHA can improve the thermal insulation properties and mechanical strength of the foam; in soft foam, DMCHA can adjust the elasticity and softness of the foam.

4.4 Environmental protection and safety

DMCHA will not produce harmful substances during the reaction process and has good environmental protection performance. In addition, the storage and transportation of DMCHA are relatively safe. As long as the correct operating specifications are followed, safety accidents can be effectively avoided.

V. Comparison between DMCHA and other catalysts

5.1 Comparison with tertiary amine catalysts

Term amine catalysts are one of the commonly used catalysts in the polyurethane industry. Compared with DMCHA, tertiary amine catalysts have lower catalytic efficiency,The response time is long. In addition, tertiary amine catalysts may cause side reactions in some formulations, affecting the performance of the product.

5.2 Comparison with metal catalysts

Metal catalysts (such as organotin compounds) are also widely used in the polyurethane industry. Compared with DMCHA, metal catalysts have higher catalytic efficiency, but they have certain toxicity and environmental pollution problems. As an organic amine catalyst, DMCHA has better environmental protection performance.

5.3 Comparison with acid catalysts

Acidic catalysts (such as phosphoric acid) are also used in certain polyurethane formulations. Compared with DMCHA, acid catalysts have lower catalytic efficiency and may cause corrosion to the equipment. As an alkaline catalyst, DMCHA has better equipment compatibility.

VI. Future development of DMCHA

6.1 Research and development of new catalysts

With the continuous development of the polyurethane industry, the requirements for catalysts are becoming higher and higher. In the future, researchers may develop more efficient and environmentally friendly new catalysts to meet the needs of different application areas.

6.2 Promotion of Green Chemistry

Green chemistry is an important direction for the future development of the chemical industry. As an environmentally friendly catalyst, DMCHA will be widely used under the promotion of green chemistry. In the future, DMCHA production processes may be further optimized to reduce the impact on the environment.

6.3 Application of intelligent production

With the popularity of intelligent production, the production and application process of DMCHA may be more automated and intelligent. By introducing advanced control systems and data analysis technology, the production efficiency and application effect of DMCHA can be improved.

7. Conclusion

DMCHA is a highly efficient and environmentally friendly catalyst and has a wide range of application prospects in the polyurethane industry. Its excellent catalytic properties, wide applicability and good environmental protection make it an ideal choice for polyurethane formulations. In the future, with the development of new catalysts and the promotion of green chemistry, DMCHA will play a more important role in the polyurethane industry.

Through the introduction of this article, I believe readers have a more comprehensive understanding of DMCHA. I hope this article can provide valuable reference for practitioners of the polyurethane industry and promote the sustainable development of the polyurethane industry.

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