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DMCHA: The preferred catalyst in polyurethane foam production

admin 3月 9th, 2025 News

DMCHA: The preferred catalyst in polyurethane foam production

Introduction

Polyurethane foam is a polymer material widely used in construction, furniture, automobiles, packaging and other fields. Its excellent physical properties and chemical stability make it one of the indispensable materials in modern industry. In the production process of polyurethane foam, the choice of catalyst is crucial, which not only affects the reaction rate, but also directly affects the performance of the final product. As a highly efficient catalyst, DMCHA (N,N-dimethylcyclohexylamine) has become the preferred catalyst in the production of polyurethane foam due to its excellent catalytic properties and wide application range.

1. Basic properties 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 amine odor. The molecular structure of DMCHA contains one cyclohexane ring and two methyl substituted amino groups, which confers good solubility and reactivity.

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

1.3 Chemical Properties

DMCHA is a strong basic compound with good nucleophilicity and reactivity. It can react with isocyanate (NCO) groups to form carbamates, thereby promoting the formation of polyurethane foam. In addition, DMCHA also has good thermal stability and chemical stability, and can maintain its catalytic activity under high temperatures and strong acid and alkali environments.

2. Application of DMCHA in the production of polyurethane foam

2.1 Catalytic mechanism

DMCHA is mainly used as a foaming catalyst in the production process of polyurethane foam. The catalytic mechanism is as follows:

Reaction of isocyanate and water: DMCHA can catalyze the reaction of isocyanate and water to form carbon dioxideand amine. Carbon dioxide acts as a foaming agent to expand the polyurethane foam and form a porous structure.

[
R-NCO + H_2O xrightarrow{DMCHA} R-NH_2 + CO_2
]
Reaction of isocyanate and polyol: DMCHA can also catalyze the reaction of isocyanate and polyol to form carbamate, forming the backbone structure of polyurethane.

[
R-NCO + R’-OH xrightarrow{DMCHA} R-NH-COO-R’
]

2.2 Application Advantages

High-efficiency Catalysis: DMCHA has high catalytic activity, can significantly increase the reaction rate and shorten the production cycle.
Good foaming effect: DMCHA can catalyze the foaming reaction evenly, making the foam structure uniform and the pore size distribution reasonable.
Excellent physical properties: Polyurethane foams using DMCHA as catalyst have high mechanical strength and good elasticity.
Wide application range: DMCHA is suitable for a variety of types of polyurethane foams, including soft foams, rigid foams and semi-rigid foams.

2.3 Application Example

2.3.1 Soft polyurethane foam

Soft polyurethane foam is widely used in furniture, mattresses, car seats and other fields. As a foaming catalyst, DMCHA can make the foam have good elasticity and comfort.

parameters	value
Density	20-40 kg/m³
Tension Strength	80-120 kPa
Elongation	150-250%
Rounce rate	40-60%

2.3.2 Rigid polyurethane foam

Rough polyurethane foam is mainly used in the fields of building insulation, refrigeration equipment, etc. DMCHA can make the foam have high mechanical strength and good thermal insulation properties.

parameters	value
Density	30-50 kg/m³
Compression Strength	150-250 kPa
Thermal conductivity	0.020-0.025 W/m·K
Water absorption	<2%

2.3.3 Semi-rigid polyurethane foam

Semi-rigid polyurethane foam is often used in automotive interiors, packaging materials and other fields. DMCHA can make foam have good cushioning and energy absorption properties.

parameters	value
Density	50-80 kg/m³
Compression Strength	100-200 kPa
Rounce rate	30-50%
Energy absorption performance	Excellent

I. Comparison between DMCHA and other catalysts

3.1 Commonly used catalysts

In the production of polyurethane foam, commonly used catalysts include tertiary amine catalysts, metal catalysts, and organotin catalysts. Here are some comparisons of several common catalysts:

Catalytic Type	Pros	Disadvantages
Term amine catalysts	High catalytic activity and good foaming effect	The smell is strong and it is irritating to the skin
Metal Catalyst	High catalytic activity and fast reaction rate	The price is high and has a great impact on the environment
Organotin Catalyst	High catalytic activity and fast reaction rate	More toxic and harmful to the environment and the human body
DMCHA	High catalytic activity, good foaming effect, environmentally friendly	Relatively high price

3.2 Advantages of DMCHA

Environmentality: DMCHA has low toxicity, less harmful to the environment and the human body, and meets the environmental protection requirements of modern industry.
High efficiency: DMCHA has high catalytic activity, which can significantly increase the reaction rate and shorten the production cycle.
Veriofunction: DMCHA can not only catalyze foaming reactions, but also catalyze gel reactions, making polyurethane foam have good physical properties.

IV. DMCHA production process

4.1 Raw material preparation

DMCHA production raw materials mainly include cyclohexylamine and formaldehyde. Cyclohexylamine is a common organic amine, and formaldehyde is a commonly used aldehyde compound.

4.2 Reaction process

The production process of DMCHA mainly includes the following steps:

Reaction of cyclohexylamine and formaldehyde: Cyclohexylamine and formaldehyde react under acidic conditions to form N-methylcyclohexylamine.

[
C6H{11}NH_2 + CH_2O rightarrow C6H{11}NHCH_3 + H_2O
]
Reaction of N-methylcyclohexylamine and formaldehyde: N-methylcyclohexylamine and formaldehyde further react to form DMCHA.

[
C6H{11}NHCH_3 + CH_2O rightarrow C6H{11}N(CH_3)_2 + H_2O
]

4.3 Product Refining

After the reaction is completed, DMCHA is purified by distillation, extraction and other processes to obtain high-purity DMCHA products.

V. Market prospects of DMCHA

5.1 Market demand

With the wide application of polyurethane foam in various fields, the demand for efficient catalysts is increasing. As an efficient and environmentally friendly catalyst, DMCHA has market demandContinuous growth.

5.2 Development trends

Environmental Catalyst: With the increasing strictness of environmental protection regulations, environmentally friendly catalysts will become the mainstream in the market. DMCHA has broad market prospects due to its low toxicity and environmental protection.
High-performance catalysts: With the continuous expansion of the application field of polyurethane foam, the requirements for catalyst performance are becoming increasingly high. DMCHA will become the first choice for high-performance catalysts due to its high efficiency and versatility.

5.3 Market Challenges

Price Competition: DMCHA has relatively high production costs and faces the challenges of price competition.
Technical barriers: DMCHA’s production process is relatively complex and the technical barriers are high, and new entrants face greater technical challenges.

VI. Conclusion

DMCHA is a highly efficient and environmentally friendly catalyst and has a wide range of application prospects in the production of polyurethane foam. Its excellent catalytic properties and versatility make it a preferred catalyst in polyurethane foam production. With the increasing strict environmental regulations and the continuous expansion of the application field of polyurethane foam, the market demand for DMCHA will continue to grow. However, DMCHA has high production costs and large technical barriers. Enterprises need to continue to work hard in technological innovation and cost control to cope with market challenges and seize development opportunities.

Appendix: DMCHA product parameter table

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
Catalytic Activity	High
Environmental	Low toxicity, environmentally friendly
Scope of application	Soft, hard, semi-rigid polyurethane foam

Through the above content, we can fully understand the importance and application advantages of DMCHA in the production of polyurethane foam. I hope this article can provide valuable reference for technicians and decision makers in relevant industries.

Research on DMCHA to improve the softness of polyurethane products

admin 3月 9th, 2025 News

DMCHA’s exploration on improving the softness of polyurethane products

Introduction

Polyurethane (PU) is a polymer material widely used in the fields of industry, construction, automobile, furniture, etc. Its excellent physical properties and chemical stability make it an important part of modern materials science. However, the softness of polyurethane products is particularly important in some applications, such as soft foams, elastomers, coatings, etc. To improve the softness of polyurethane products, researchers have continuously explored various additives and modifiers. Among them, N,N-dimethylcyclohexylamine (DMCHA) is a commonly used catalyst and is widely used in the production of polyurethane products. This article will discuss in detail the mechanism, application effect and related parameters of DMCHA in improving the softness of polyurethane products.

1. Factors influencing the softness of polyurethane products

1.1 Molecular Structure

The molecular structure of polyurethane is mainly composed of hard and soft segments. The hard segment is usually formed by reaction of isocyanate and chain extenders such as diols or diamines, while the soft segment is composed of polyether or polyester polyols. Factors such as the ratio of hard and soft segments, molecular weight distribution and crosslinking density directly affect the softness of polyurethane products.

1.2 Crosslinking density

The crosslink density refers to the number of crosslinking points between the polyurethane molecular chains. The higher the crosslinking density, the greater the hardness of the material and the lower the softness. Therefore, the softness of the polyurethane product can be effectively controlled by adjusting the crosslinking density.

1.3 Additives

In the production process of polyurethane products, the type and amount of additives have a significant impact on the performance of the final product. Commonly used additives include catalysts, plasticizers, fillers, etc. Among them, the selection of catalyst has an important influence on the reaction rate, molecular structure and final performance of polyurethane.

2. Basic properties of DMCHA

2.1 Chemical structure

The chemical name of DMCHA is N,N-dimethylcyclohexylamine and the molecular formula is C8H17N. It is a colorless to light yellow liquid with a unique amine odor. The molecular structure of DMCHA contains one cyclohexyl group and two methyl groups, which makes it have good solubility and reactivity.

2.2 Physical Properties

parameters	value
Molecular Weight	127.23 g/mol
Boiling point	159-161°C
Density	0.85 g/cm³
Flashpoint	45°C
Solution	Easy soluble in organic solvents

2.3 Catalytic properties

DMCHA, as a tertiary amine catalyst, has high catalytic activity. It can effectively promote the reaction between isocyanate and polyol, shorten the reaction time and improve production efficiency. In addition, DMCHA has good selectivity and can exhibit different catalytic effects under different reaction conditions.

3. Application of DMCHA in polyurethane products

3.1 Reaction mechanism

In the production process of polyurethane products, DMCHA mainly participates in the reaction through the following two methods:

Catalyzed the reaction of isocyanate and polyol: DMCHA can accelerate the addition reaction between isocyanate and polyol, forming carbamate bonds. This process is a key step in the formation of polyurethane molecular chains.
Modify the reaction rate: The catalytic activity of DMCHA can be controlled by adjusting its dosage. A moderate amount of DMCHA can make the reaction proceed smoothly and avoid uneven molecular structure caused by excessive reaction.

3.2 Effect on softness

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

Reduce crosslink density: DMCHA can reduce the crosslink density between polyurethane molecular chains by adjusting the reaction rate. Lower crosslinking density means that the interaction between the molecular chains is weakened, thus allowing the material to exhibit better softness.
Improving molecular structure: The catalytic action of DMCHA helps to form a more uniform molecular structure. A uniform molecular structure can reduce stress concentration inside the material and improve the flexibility and elasticity of the material.
Improving reaction efficiency: The high catalytic activity of DMCHA can shorten the reaction time and improve production efficiency. This not only reduces production costs, but also helps to obtain more stable polyurethane products.

3.3 Application Example

The following are some examples of DMCHA application in different types of polyurethane products:

Product Type	DMCHA dosage (%)	Softness Improvement Effect
Soft foam	0.5-1.0	Sharp improvement
Elastomer	0.3-0.8	Important improvement
Coating	0.2-0.5	Moderate improvement
Odulant	0.1-0.3	Slight improvement

4. Comparison of DMCHA with other catalysts

4.1 Catalytic activity

DMCHA has higher catalytic activity compared with other commonly used polyurethane catalysts. The following table lists the catalytic activity comparisons of several common catalysts:

Catalyzer	Catalytic activity (relative value)
DMCHA	1.0
DABCO	0.8
TEDA	0.7
BDMAEE	0.6

4.2 Effect on softness

The impact of different catalysts on the softness of polyurethane products is also different. The following table compares the effects of several common catalysts on softness:

Catalyzer	Softness Improvement Effect
DMCHA	Significant
DABCO	Obvious
TEDA	General
BDMAEE	Minimal

4.3 Cost and environmental protectionSex

DMCHA also has certain advantages in terms of cost and environmental protection. Compared with other catalysts, DMCHA has lower production costs and produces fewer harmful substances during use, which meets the environmental protection requirements of modern industry.

5. Application optimization of DMCHA

5.1 Dosage control

The amount of DMCHA has a significant impact on the performance of polyurethane products. Excessive amounts may lead to excessive rapid reactions and uneven molecular structures; while excessively low amounts may lead to incomplete reactions and affect the performance of the final product. Therefore, in actual applications, it is necessary to reasonably control the dosage of DMCHA according to the requirements of the specific product.

5.2 Reaction conditions

Reaction conditions (such as temperature, pressure, stirring speed, etc.) also have an important influence on the catalytic effect of DMCHA. Appropriate reaction conditions can fully exert the catalytic effect of DMCHA and obtain polyurethane products with excellent performance.

5.3 Synergistic effects with other additives

In actual production, DMCHA is usually used in conjunction with other additives (such as plasticizers, fillers, etc.). By optimizing the proportion of various additives, the flexibility and other properties of polyurethane products can be further improved.

6. Conclusion

DMCHA, as an efficient polyurethane catalyst, shows significant advantages in improving the softness of polyurethane products. By reasonably controlling the amount and reaction conditions of DMCHA, the cross-linking density of polyurethane products can be effectively reduced, the molecular structure can be improved, and the softness and elasticity of the material can be improved. In addition, DMCHA also has certain advantages in terms of cost and environmental protection, making it an ideal choice for polyurethane products production.

In practical applications, the dosage, reaction conditions and synergistic effects of DMCHA need to be optimized according to the requirements of the specific product. Through continuous exploration and optimization, DMCHA’s application prospects in polyurethane products will be broader.

Appendix

Appendix 1: Chemical structure diagram of DMCHA

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

Appendix 2: Application parameters of DMCHA in different polyurethane products

Product Type	DMCHA dosage (%)	Reaction temperature (°C)	Reaction time (min)	Softness Improvement Effect
Soft foam	0.5-1.0	60-80	10-20	Sharp improvement
Elastomer	0.3-0.8	70-90	15-25	Important improvement
Coating	0.2-0.5	50-70	5-15	Moderate improvement
Odulant	0.1-0.3	40-60	5-10	Slight improvement

Appendix 3: Comparison of properties of DMCHA with other catalysts

Catalyzer	Catalytic activity (relative value)	Softness Improvement Effect	Cost (relative value)	Environmental protection (relative value)
DMCHA	1.0	Significant	1.0	1.0
DABCO	0.8	Obvious	1.2	0.9
TEDA	0.7	General	1.5	0.8
BDMAEE	0.6	Minimal	1.8	0.7

Through the above detailed analysis and comparison, it can be seen that DMCHA has significant advantages in improving the softness of polyurethane products. I hope this article can provide valuable reference for research and application in related fields.

Application of DMCHA in environmentally friendly polyurethane adhesives

admin 3月 9th, 2025 News

Application of DMCHA in environmentally friendly polyurethane adhesives

Catalog

Introduction
Overview of polyurethane adhesives
Introduction to DMCHA
The role of DMCHA in polyurethane adhesives
Advantages of environmentally friendly polyurethane adhesives
Examples of application of DMCHA in environmentally friendly polyurethane adhesives
Comparison of product parameters and performance
Future development trends
Conclusion

1. Introduction

With the increasing awareness of environmental protection and the increasingly strict environmental protection regulations, environmentally friendly materials are increasingly widely used in various fields. As an important industrial material, polyurethane adhesives have also received widespread attention in their environmental protection properties. DMCHA (N,N-dimethylcyclohexylamine) plays an important role in environmentally friendly polyurethane adhesives as a highly efficient catalyst. This article will introduce in detail the application of DMCHA in environmentally friendly polyurethane adhesives, including its mechanism of action, application examples, product parameters and future development trends.

2. Overview of polyurethane adhesives

Polyurethane adhesive is a polymer compound produced by the reaction of isocyanate and polyol, with excellent adhesive properties, weather resistance and chemical stability. Widely used in construction, automobile, furniture, packaging and other fields. The main components of polyurethane adhesives include isocyanates, polyols, catalysts, fillers and additives.

2.1 Classification of polyurethane adhesives

Depending on the curing method, polyurethane adhesives can be divided into two categories:

Single-component polyurethane adhesive: cured by moisture or heating in the air, it is easy to use, but the curing speed is slow.
Two-component polyurethane adhesive: consists of main agent and curing agent, which cures quickly after mixing, has high adhesive strength, but is complex in operation.

2.2 Performance characteristics of polyurethane adhesive

High bonding strength: Can bond a variety of materials, such as metal, plastic, wood, ceramics, etc.
Good weather resistance: It can maintain stable performance in harsh environments such as high temperature, low temperature, and humidity.
Excellent chemical stability: resistant to oil, solvent, acid and alkali and other chemical substances.
Adjustable curing speed: By adjusting the type and use of catalystThe curing speed can be controlled.

3. Introduction to DMCHA

DMCHA (N,N-dimethylcyclohexylamine) is an organic amine compound with the chemical formula C8H17N. It is a colorless to light yellow liquid with an ammonia odor and is easily soluble in water and organic solvents. DMCHA is mainly used as a catalyst in polyurethane reaction, which can significantly improve the reaction rate and improve the performance of the product.

3.1 Physical and chemical properties of DMCHA

Properties	value
Molecular Weight	127.23 g/mol
Boiling point	159-161 °C
Density	0.85 g/cm³
Flashpoint	45 °C
Solution	Easy soluble in water, etc.

3.2 DMCHA synthesis method

The synthesis of DMCHA mainly produces N-methylcyclohexylamine through reaction of cyclohexylamine with formaldehyde, and then reacts with formaldehyde to produce N,N-dimethylcyclohexylamine. The specific reaction equation is as follows:

Cyclohexylamine + Formaldehyde ? N-methylcyclohexylamine
N-methylcyclohexylamine + formaldehyde ? N,N-dimethylcyclohexylamine

4. The role of DMCHA in polyurethane adhesives

DMCHA is mainly used as a catalyst in polyurethane adhesives, and its mechanism of action is as follows:

4.1 Catalyzing the reaction of isocyanate with polyols

DMCHA can accelerate the reaction of isocyanate with polyols to form polyurethane polymers. The reaction equation is as follows:

R-NCO + R’-OH ? R-NH-COO-R’

DMCHA promotes the nucleophilic addition reaction between isocyanate and polyol by providing an alkaline environment, thereby increasing the reaction rate.

4.2 Adjust the curing speed

The amount of DMCHA can adjust the curing speed of the polyurethane adhesive. A proper amount of DMCHA can enable the adhesive to achieve a higher bonding strength in a short period of time, while excessive amounts may lead to excessive reaction and affect operating performance.

4.3 Improve product performance

DMCHA can not only improve the reaction rate, but also improve the mechanical properties, heat resistance and weather resistance of polyurethane adhesives. By adjusting the amount of DMCHA, adhesive products with different properties can be obtained.

5. Advantages of environmentally friendly polyurethane adhesives

Environmentally friendly polyurethane adhesive refers to an adhesive that has less environmental impact during production and use. Its main advantages include:

5.1 Low VOC emissions

VOC (volatile organic compounds) is one of the main factors causing air pollution. Environmentally friendly polyurethane adhesives significantly reduce VOC emissions by using low VOC raw materials and optimizing production processes.

5.2 Non-toxic and harmless

Environmentally friendly polyurethane adhesives use non-toxic or low-toxic raw materials, reducing the harm to human health and the environment. Especially in interior decoration and furniture manufacturing, the use of environmentally friendly adhesives can effectively improve indoor air quality.

5.3 Biodegradable

Some environmentally friendly polyurethane adhesives use biodegradable raw materials that can decompose in the natural environment and reduce the long-term impact on the environment.

5.4 Energy saving and consumption reduction

The production process of environmentally friendly polyurethane adhesives usually uses energy-saving technology, reducing energy consumption and carbon emissions. At the same time, its excellent performance also extends the service life of the product and reduces resource waste.

6. Examples of application of DMCHA in environmentally friendly polyurethane adhesives

6.1 Construction Field

In the field of construction, environmentally friendly polyurethane adhesives are widely used in wall insulation, floor laying, roof waterproofing and other projects. As a catalyst, DMCHA can significantly improve the curing speed and bonding strength of the adhesive, ensuring construction quality and efficiency.

6.1.1 Wall insulation

In wall insulation projects, environmentally friendly polyurethane adhesives are used to bond insulation materials (such as polystyrene foam boards) and walls. The addition of DMCHA allows the adhesive to cure in a short time, ensuring the firm bond between the insulation material and the wall, and improving the insulation effect.

6.1.2 Floor laying

In floor laying, environmentally friendly polyurethane adhesive is used to bond floor materials and floors. The catalytic action of DMCHA allows the adhesive to achieve a high bonding strength in a short time, ensuring the flatness and stability of the floor.

6.2 Automobile Manufacturing

In automobile manufacturing, environmentally friendly polyurethane adhesives are used to bond body parts, interior materials and sealing strips, etc. The addition of DMCHA allows the adhesive to cure in a short time and improve production efficiency.

6.2.1 Body bonding

In car body bonding, environmentally friendly polyurethane adhesive is used to bond metal plates and plasticspart. The catalytic action of DMCHA allows the adhesive to achieve higher bonding strength in a short time, ensuring the firmness and stability of the vehicle body.

6.2.2 Interior material bonding

In the bonding of interior materials, environmentally friendly polyurethane adhesives are used to bond seats, carpets, ceilings, etc. The addition of DMCHA allows the adhesive to cure in a short time, ensuring the firmness and aesthetics of the interior materials.

6.3 Furniture Manufacturing

In furniture manufacturing, environmentally friendly polyurethane adhesives are used to bond wood, boards and decorative materials, etc. The catalytic action of DMCHA allows the adhesive to cure in a short time and improves production efficiency.

6.3.1 Wood bonding

In wood bonding, environmentally friendly polyurethane adhesives are used to bond wood boards and strips. The addition of DMCHA allows the adhesive to achieve higher bonding strength in a short time, ensuring the firmness and stability of the furniture.

6.3.2 Plate bonding

In sheet bonding, environmentally friendly polyurethane adhesive is used to bond plywood and density boards. The catalytic action of DMCHA allows the adhesive to cure in a short time, ensuring the flatness and stability of the sheet.

7. Comparison of product parameters and performance

7.1 Product parameters

The following are the product parameters of several common environmentally friendly polyurethane adhesives:

Product Name	Currecting time	Bonding Strength	VOC content	Applicable temperature range
Environmental-friendly polyurethane adhesive A	30 minutes	10 MPa	<50 g/L	-20°C to 80°C
Environmental-friendly polyurethane adhesive B	20 minutes	12 MPa	<30 g/L	-30°C to 100°C
Environmental-friendly polyurethane adhesive C	15 minutes	15 MPa	<20 g/L	-40°C to 120°C

7.2 Performance comparison

The following is a comparison of the performance of several common environmentally friendly polyurethane adhesives:

Performance metrics	Environmental-friendly polyurethane adhesive A	Environmental-friendly polyurethane adhesive B	Environmental-friendly polyurethane adhesive C
Currecting time	30 minutes	20 minutes	15 minutes
Bonding Strength	10 MPa	12 MPa	15 MPa
VOC content	<50 g/L	<30 g/L	<20 g/L
Applicable temperature range	-20°C to 80°C	-30°C to 100°C	-40°C to 120°C

8. Future development trends

8.1 High performance

With the advancement of technology, environmentally friendly polyurethane adhesives will develop towards high performance. By optimizing the formulation and process, the adhesive strength, heat resistance and weather resistance of the adhesive are improved, and the application scenarios with higher requirements are met.

8.2 Multifunctional

The future environmentally friendly polyurethane adhesive will not only have adhesive functions, but also have waterproof, fireproof, mildewproof and other functions. By adding functional additives, one dose can be used multiple times and the added value of the product can be increased.

8.3 Intelligent

With the development of intelligent manufacturing, environmentally friendly polyurethane adhesives will develop towards intelligence. By introducing intelligent materials and technologies, automatic adjustment and intelligent control of adhesives can be achieved, and production efficiency and product quality can be improved.

8.4 Greening

The green trend of environmentally friendly polyurethane adhesives will be further strengthened. By using renewable resources and bio-based raw materials, we will reduce our dependence on fossil resources, reduce the carbon footprint of our products, and achieve sustainable development.

9. Conclusion

DMCHA, as an efficient catalyst, plays an important role in environmentally friendly polyurethane adhesives. By accelerating the reaction of isocyanate with polyol, DMCHA can significantly improve the curing speed and bonding strength of the adhesive and improve product performance. Environmentally friendly polyurethane adhesives have the advantages of low VOC emissions, non-toxic and harmless, biodegradable, energy-saving and consumption-reducing, and are widely used in construction, automobiles, furniture and other fields. Future, theType-retaining polyurethane adhesives will develop towards high performance, multifunctionality, intelligence and greenness, providing more environmentally friendly and efficient bonding solutions to all industries.

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