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DMCHA (N,N-dimethylcyclohexylamine): Technical support for higher adhesion for high-performance sealants

3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): Technical support for higher adhesion for high-performance sealants

Introduction

In modern industrial and construction fields, the application of sealant is everywhere. Whether it is architectural curtain walls, automobile manufacturing, or electronic equipment packaging, sealants play a crucial role. However, with the advancement of technology and the diversification of needs, traditional sealants can no longer meet the needs of high-performance applications. It is in this context that N,N-dimethylcyclohexylamine (DMCHA) as an efficient catalyst and additive has gradually become a key technical support in the field of high-performance sealants.

This article will deeply explore the application of DMCHA in sealants and analyze how it provides technical support for high-performance sealants by enhancing adhesion, improving curing performance, and improving weather resistance. We will elaborate on the basic properties, mechanism of action, product parameters, application cases and other angles of DMCHA, striving to provide readers with a comprehensive and in-depth understanding.

1. Basic properties of DMCHA

1.1 Chemical structure and physical properties

DMCHA, whose full name is N,N-dimethylcyclohexylamine, is an organic compound with its chemical structure as follows:

 CH3
        |
   N-CH3
    /
C6H10 C6H10

DMCHA is a colorless to light yellow liquid with a typical amine odor. Its molecular weight is 141.25 g/mol, the boiling point is 165-167°C, and the density is 0.86 g/cm³. DMCHA is easily soluble in organic solvents, such as, etc., but has a low solubility in water.

1.2 Chemical Properties

DMCHA is a tertiary amine, which has strong alkalinity and can react with acid to form a salt. In addition, DMCHA has strong nucleophilicity and can react with epoxy groups, isocyanate groups, etc. Therefore, DMCHA is often used as a catalyst during the curing process of polyurethanes, epoxy resins and other materials.

2. The mechanism of action of DMCHA in sealants

2.1 Catalysis

One of the main functions of DMCHA in sealants is to act as a catalyst to accelerate the curing reaction. Taking polyurethane sealant as an example, DMCHA can react with isocyanate groups to form intermediates, thereby promoting the growth and cross-linking of polyurethane chains. This process not only shortens the curing time, but also improves the mechanical properties of the sealant.

2.1.1 Catalytic mechanism

The catalytic effect of DMCHA is mainly achieved through the following steps:

  1. Nuclear-pro-attack: The nitrogen atoms in DMCHA have lone pairs of electrons and can nucleophilic attack on carbon atoms in isocyanate groups to form intermediates.
  2. Proton Transfer: The intermediate generates new isocyanate groups and DMCHA through proton transfer.
  3. Chapter Growth: New isocyanate groups continue to react with polyols to form polyurethane chains.

This catalytic process not only increases the reaction rate, but also allows the sealant to have a higher crosslink density after curing, thereby enhancing adhesion and mechanical strength.

2.2 Enhance adhesion

DMCHA significantly enhances the adhesiveness of the sealant by improving the curing properties and cross-linking density of the sealant. Specifically, DMCHA can:

  1. Improving crosslinking density: Through catalytic action, DMCHA causes the sealant to form more crosslinking points during the curing process, thereby improving the overall strength of the material.
  2. Improving Interface Adhesion: DMCHA can react with active groups on the surface of the substrate to form chemical bonds, thereby enhancing the adhesion between the sealant and the substrate.

2.3 Improve weather resistance

DMCHA can also improve its weather resistance by adjusting the molecular structure of the sealant. Specifically, DMCHA can:

  1. Improving heat resistance: By increasing the crosslinking density, DMCHA allows the sealant to maintain high mechanical properties in high temperature environments.
  2. Enhanced water resistance: DMCHA can react with hydrophilic groups in sealants, reduce the material’s absorption of moisture, thereby improving its water resistance.

III. Product parameters of DMCHA

In order to better understand the application of DMCHA in sealants, we have sorted out the main product parameters of DMCHA, as shown in the following table:

parameter name Value/Description
Molecular Weight 141.25 g/mol
Boiling point 165-167°C
Density 0.86 g/cm³
Appearance Colorless to light yellow liquid
odor Amine Odor
Solution Easy soluble in organic solvents, slightly soluble in water
Alkaline Strong alkaline
Catalytic Activity High
Application Fields Polyurethane sealant, epoxy resin sealant, etc.

IV. Application cases of DMCHA in high-performance sealant

4.1 Building curtain wall sealant

In the field of architectural curtain walls, sealants not only need to have good adhesion, but also need to have excellent weather resistance and aging resistance. Through its efficient catalytic action and ability to enhance adhesion, DMCHA enables building curtain wall sealants to maintain stable performance under long-term exposure to sunlight, rainwater and other environments.

4.1.1 Application Effect

  • Adhesion enhancement: The adhesive strength of sealant using DMCHA to substrates such as glass and aluminum alloy has been increased by more than 20%.
  • Weather resistance improvement: After 1,000 hours of ultraviolet aging test, the tensile strength and elongation retention rate of the sealant are both above 90%.

4.2 Automobile manufacturing sealant

In automobile manufacturing, sealant is widely used in body joints, window seals and other parts. Through its efficient catalytic action, DMCHA enables automotive sealants to achieve a higher degree of curing in a short period of time, thereby improving production efficiency.

4.2.1 Application effect

  • Shortening time: The curing time of using DMCHA sealant at room temperature was reduced by 30%.
  • Mechanical performance improvement: The tensile strength and tear strength of the sealant have been increased by 15% and 10% respectively.

4.3 Electronic equipment packaging sealant

In the field of electronic equipment packaging, sealants need to have excellent insulation properties and heat resistance. DMCHA can enhance crosslinking density through its ability to enable sealants to maintain good insulation performance under high temperature environments.

4.3.1 Application Effect

  • Enhanced Heat Resistance: Use DMCHA SealantThe insulation resistance retention rate at 150°C is above 95%.
  • Adhesion enhancement: The adhesiveness of sealant and PCB board has increased by 25%.

V. Future development trends of DMCHA

With the increasing demand for high-performance sealants, DMCHA, as a highly efficient catalyst and additive, has a broad application prospect. In the future, the development trends of DMCHA may include:

  1. Green and Environmental Protection: With the increase in environmental protection requirements, the synthesis process of DMCHA may develop in a more environmentally friendly direction and reduce its impact on the environment.
  2. Multifunctionalization: DMCHA in the future may have more functions, such as antibacterial, antistatic, etc., to meet the needs of different application fields.
  3. High performance: Through the optimization of molecular structure, the catalytic activity and ability to enhance adhesion of DMCHA may be further improved, thereby meeting the needs of higher performance sealants.

VI. Conclusion

DMCHA plays a crucial role in the field of high-performance sealants as an efficient catalyst and additive. Through its catalytic action, enhanced adhesion and improved weather resistance, DMCHA provides strong technical support for the performance improvement of sealant. In the future, with the continuous advancement of technology, the application prospects of DMCHA will be broader, injecting new vitality into the development of high-performance sealants.

Appendix: Comparison table of application effects of DMCHA in different sealants

Sealant Type Application Fields Adhesion enhancement Shortening time Elevated weather resistance Heat resistance is improved
Building Curtain Wall Sealant Building Curtain Wall 20% – 90% –
Automotive Sealant Automotive Manufacturing 15% 30% – –
Electronic Equipment Packaging Sealant Electronic Equipment Packaging 25% – – 95%

Through the detailed explanation of the above content, we can see that the application of DMCHA in high-performance sealants not only has significant technical advantages, but also has broad market prospects. I hope this article can provide readers with a comprehensive and in-depth understanding and provide reference for research and application in related fields.

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Breakthrough Progress and Application of DMCHA (N,N-dimethylcyclohexylamine) in the Field of Waterproof Materials

3月 12th, 2025 News

Breakthrough Progress and Application of DMCHA (N,N-dimethylcyclohexylamine) in the Field of Waterproof Materials

Introduction

With the rapid development of the construction industry, the demand for waterproof materials is growing. Traditional waterproof materials have many shortcomings in performance, environmental protection and construction convenience. In recent years, N,N-dimethylcyclohexylamine (DMCHA) has made breakthrough progress in the field of waterproof materials as a new chemical additive. This article will introduce in detail the characteristics of DMCHA, its application in waterproof materials, product parameters and future development directions.

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. Its structure is:

 CH3
       |
  C6H11-N-CH3

1.2 Physical Properties

Properties value
Appearance Colorless to light yellow liquid
Density 0.85 g/cm³
Boiling point 160-162°C
Flashpoint 45°C
Solution Easy soluble in organic solvents, slightly soluble in water

1.3 Chemical Properties

DMCHA has the following chemical properties:

  • Basic: DMCHA is a weak alkali that can react with acid to form a salt.
  • Stability: Stable at room temperature, but decomposition may occur under high temperature or strong acid and alkali conditions.
  • Reaction activity: DMCHA can react with a variety of organic compounds and is often used in catalysis, cross-linking and other reactions.

2. Application of DMCHA in waterproofing materials

2.1 Waterproof coating

2.1.1 Mechanism of action

DMCHA is mainly used as a catalyst and a crosslinker in waterproof coatings. Its mechanism of action is as follows:

  • Catalytic Effect: DMCHA can accelerate the curing reaction of polyurethane, epoxy resin and other materials, and improve the film formation speed and strength of the coating.
  • Crosslinking: DMCHA can react with active groups in the coating to form a three-dimensional network structure, enhancing the water resistance and mechanical properties of the coating.

2.1.2 Product parameters

parameters value
Current time 2-4 hours
Water resistance >96 hours
Tension Strength >10 MPa
Elongation >300%
Weather resistance >1000 hours

2.2 Waterproof coil

2.2.1 Mechanism of action

DMCHA is mainly used as a plasticizer and stabilizer in waterproof coils. Its mechanism of action is as follows:

  • Plasticization effect: DMCHA can improve the flexibility and ductility of the coil, making it less likely to break during construction.
  • Stable effect: DMCHA can inhibit the aging of the coil under high temperature or ultraviolet irradiation and extend its service life.

2.2.2 Product parameters

parameters value
Thickness 1.5-2.0 mm
Tension Strength >15 MPa
Elongation >400%
Heat resistance >120°C
Dropping resistance <-40°C

2.3 Waterproof mortar

2.3.1 Mechanism of action

DMCHA is mainly used as a dispersant and reinforcer in waterproof mortar. Its mechanism of action is as follows:

  • Dispersion: DMCHA can improve the dispersion of various components in the mortar and improve the uniformity and compactness of the mortar.
  • Enhancement: DMCHA can react with cement particles in the mortar to form a dense network structure, enhancing the strength and waterproofing properties of the mortar.

2.3.2 Product parameters

parameters value
Compressive Strength >30 MPa
Fracture Strength >6 MPa
Water absorption <5%
Water resistance >72 hours
Weather resistance >500 hours

3. Advantages of DMCHA in waterproofing materials

3.1 Environmental protection

DMCHA is a low-toxic and low-volatility chemical that meets the environmental protection requirements of modern building materials. It will not produce harmful gases during its use and are friendly to construction workers and the environment.

3.2 Construction convenience

DMCHA can significantly improve the construction performance of waterproof materials, such as shortening curing time, improving the leveling of the paint, enhancing the flexibility of the coil, etc., thereby reducing construction difficulty and cost.

3.3 Performance superiority

DMCHA can significantly improve the performance indicators of waterproof materials, such as water resistance, weather resistance, mechanical strength, etc., so that it can maintain good waterproofing effect in harsh environments.

IV. Future development direction of DMCHA in waterproof materials

4.1 Multifunctional

The future DMCHA will not only be limited to a single function in waterproof materials, but will develop towards multifunctionality. For example, DMCHA modified waterproof materials with functions such as self-healing, antibacterial, and antistatic.

4.2 Intelligent

With the development of smart materials, DMCHA is expected to combine with smart materials to develop intelligent waterproof materials with induction and response functions. For example, smart coatings that can automatically adjust waterproofing performance based on environmental humidity.

4.3 Greening

In the future, DMCHA will pay more attention to green and environmental protection, develop more environmentally friendly and degradable DMCHA derivatives to reduce environmental pollution.

V. Conclusion

DMCHA, as a new chemical additive, has shown great application potential in the field of waterproof materials. Its excellent catalytic, crosslinking, plasticizing, dispersing and other properties have significantly improved the performance indicators of waterproof materials. In the future, with the continuous advancement of technology, DMCHA will make more breakthroughs in multifunctionalization, intelligence, greening, etc., bringing more innovation and changes to the construction waterproofing industry.

The above content introduces the breakthrough progress and application of DMCHA in the field of waterproof materials in detail, covering its basic characteristics, application fields, product parameters and future development directions. Through the form of tables and data, the content is more intuitive and easy to understand. I hope this article can provide readers with valuable information and reference.

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DMCHA (N,N-dimethylcyclohexylamine): The driving force for the development of the polyurethane industry in a greener direction

3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): The driving force for the development of the polyurethane industry in a greener direction

Introduction

With the increasing global attention to environmental protection and sustainable development, all walks of life are seeking more environmentally friendly and efficient solutions. As an important part of the chemical industry, the polyurethane industry is also actively exploring new paths for green development. As a highly efficient catalyst, N,N-dimethylcyclohexylamine (DMCHA) is becoming an important driving force for the development of the polyurethane industry in a greener direction. This article will introduce in detail the characteristics, applications and their important role in the polyurethane industry.

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 amine odor. The molecular structure of DMCHA contains a cyclohexane ring and two methyl-substituted amino groups, which imparts its unique chemical properties.

1.2 Physical Properties

Properties value
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Density 0.86 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 catalytic properties. It is able to react with a variety of organic and inorganic compounds, especially in polyurethane synthesis, and exhibits excellent catalytic effects. In addition, DMCHA has certain stability and can maintain its catalytic activity over a wide temperature range.

2. Application of DMCHA in the polyurethane industry

2.1 Basic concepts of polyurethane

Polyurethane (PU) is a polymer material produced by polymerization of polyols and isocyanates. It has excellent mechanical properties, wear resistance, chemical resistance and elasticity, and is widely used in foam plastics, elastomers, coatings, adhesives and other fields.

2.2 DMCHA in polyurethaneThe role in synthesis

In the synthesis of polyurethane, the selection of catalyst is crucial. As a highly efficient catalyst, DMCHA can significantly accelerate the reaction between polyols and isocyanates, and improve the reaction rate and product quality. Its main functions include:

  • Accelerating reaction: DMCHA can effectively reduce the reaction activation energy and enable the reaction to proceed rapidly at lower temperatures.
  • Control reaction rate: By adjusting the amount of DMCHA, the reaction rate of polyurethane can be accurately controlled, thereby obtaining ideal product performance.
  • Improving product performance: The use of DMCHA can improve the mechanical properties, heat and chemical resistance of polyurethane.

2.3 Application of DMCHA in different polyurethane products

2.3.1 Polyurethane foam

Polyurethane foam is one of the widely used fields of DMCHA. DMCHA shows excellent catalytic effects in the production of soft and rigid polyurethane foams. By adjusting the amount of DMCHA, the density, pore size and mechanical properties of the foam can be controlled to meet the needs of different application scenarios.

Foam Type DMCHA dosage Main Performance
Soft foam 0.1-0.5% High elasticity, low density
Rough Foam 0.2-0.8% High strength, low thermal conductivity

2.3.2 Polyurethane elastomer

Polyurethane elastomers have excellent wear resistance and elasticity, and are widely used in automobiles, construction and sports equipment. DMCHA can effectively control the reaction rate in the synthesis of polyurethane elastomers, improve the mechanical properties and aging resistance of the product.

Elastomer Type DMCHA dosage Main Performance
Thermoplastic elastomer 0.1-0.3% High elasticity, wear resistance
Casted elastomer 0.2-0.5% Hao QiangDegree and aging resistance

2.3.3 Polyurethane coatings and adhesives

DMCHA is mainly used in polyurethane coatings and adhesives in its excellent catalytic properties and stability. By using DMCHA, the adhesion of the coating, weathering resistance and adhesive strength can be improved.

Product Type DMCHA dosage Main Performance
Coating 0.05-0.2% High adhesion and weather resistance
Adhesive 0.1-0.4% High bonding strength, aging resistance

3. DMCHA’s Green Advantages

3.1 Low Volatile Organic Compounds (VOC) Emissions

DMCHA, as a low volatile organic compound, is used to significantly reduce VOC emissions during polyurethane production. This not only helps improve the working environment, but also reduces pollution to the atmospheric environment.

3.2 High efficiency catalysis to reduce energy consumption

The efficient catalytic properties of DMCHA enable the polyurethane reaction to be carried out quickly at lower temperatures, thereby reducing energy consumption. This not only reduces production costs, but also reduces the negative impact on the environment.

3.3 Biodegradability

DMCHA has a certain biodegradability and can gradually decompose in the natural environment, reducing the long-term impact on the environment. This makes DMCHA a more environmentally friendly catalyst choice.

4. DMCHA market prospects

4.1 Overview of the global polyurethane market

The global polyurethane market has maintained steady growth in recent years and is expected to continue this trend in the next few years. With the increasing strict environmental regulations and the increasing demand for green products from consumers, the demand for environmentally friendly catalysts in the polyurethane industry will also continue to increase.

4.2 Market demand for DMCHA

As an efficient and environmentally friendly catalyst, DMCHA’s market demand is expected to continue to grow with the green transformation of the polyurethane industry. Especially in the fields of automobiles, construction and furniture, DMCHA has broad application prospects.

4.3 Competition pattern

At present, the global DMCHA market is mainly dominated by several large chemical companies. With the advancement of technology and the expansion of the market, more companies are expected to enter this field., promote continuous innovation in the production and application technology of DMCHA.

5. DMCHA production and quality control

5.1 Production process

DMCHA production is mainly achieved through the methylation reaction of cyclohexylamine and formaldehyde. Specific processes include:

  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 and other methods to obtain a high-purity product.

5.2 Quality Control

To ensure the product quality of DMCHA, manufacturers must strictly control the following parameters:

parameters Control Range
Purity ?99%
Moisture ?0.1%
Color ?50 APHA
Acne ?0.1 mg KOH/g

5.3 Safety and Environmental Protection

The following safety and environmental protection matters should be paid attention to during the production and use of DMCHA:

  • Safe Operation: DMCHA is corrosive and irritating, and operators must wear protective equipment.
  • Waste treatment: Waste liquid and waste gas generated during the production process must be treated and can only be discharged after meeting environmental protection standards.

6. Future development direction of DMCHA

6.1 Technological Innovation

With the advancement of science and technology, the production and application technology of DMCHA will continue to innovate. In the future, it is expected to develop a more efficient and environmentally friendly DMCHA production process to further improve its catalytic performance and environmentally friendly characteristics.

6.2 Application Expansion

DMCHA application areas will be further expanded, not only in the polyurethane industry, but may also be used in other chemical fields, such as medicine, pesticides, etc. This will bring new growth points to DMCHA’s market demand.

6.3 Green certification

With the increase in environmental awareness, DMCHA’s green certification will become an important factor in market competition. In the future, more companies are expected to pass green certification to enhance the market competitiveness of their products.

Conclusion

DMCHA, as an efficient and environmentally friendly catalyst, is becoming an important driving force for the development of the polyurethane industry in a greener direction. Through its widespread application in polyurethane foams, elastomers, coatings and adhesives, DMCHA not only improves product performance, but also reduces negative impacts on the environment. With the advancement of technology and the increase in market demand, the application prospects of DMCHA will be broader, injecting new vitality into the sustainable development of the polyurethane industry.

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