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Application of N,N-dimethylcyclohexylamine as a high-efficiency catalyst in the coating industry

3月 9th, 2025 News

Application of N,N-dimethylcyclohexylamine in the coating industry

Introduction

N,N-dimethylcyclohexylamine (DMCHA) is an important organic compound that is widely used as a high-efficiency catalyst in the coating industry. Its unique chemical structure and properties make it play a key role in coating formulations. This article will introduce in detail the physical and chemical properties of N,N-dimethylcyclohexylamine, product parameters, application and advantages in the coating industry, and display relevant data in the form of tables so that readers can better understand its application value.

1. Physical and chemical properties of N,N-dimethylcyclohexylamine

1.1 Chemical structure

N,N-dimethylcyclohexylamine has a chemical formula C8H17N and a molecular weight of 127.23 g/mol. Its structure is:

 CH3
       |
  C6H11-N-CH3

1.2 Physical Properties

Properties Value/Description
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
odor Ammonia

1.3 Chemical Properties

N,N-dimethylcyclohexylamine is a strong basic compound with good nucleophilicity and catalytic activity. Its alkalinity enables it to effectively promote cross-linking reactions in the coating and improves the hardness and durability of the coating film.

2. Product parameters

2.1 Industrial grade N,N-dimethylcyclohexylamine

parameters Value/Description
Purity ?99%
Moisture content ?0.1%
Acne ?0.1 mg KOH/g
Color ?50 APHA
Packaging 200 kg/barrel

2.2 High purity N,N-dimethylcyclohexylamine

parameters Value/Description
Purity ?99.5%
Moisture content ?0.05%
Acne ?0.05 mg KOH/g
Color ?30 APHA
Packaging 25 kg/barrel

3. Application of N,N-dimethylcyclohexylamine in the coating industry

3.1 Polyurethane coating

N,N-dimethylcyclohexylamine acts as a catalyst in polyurethane coatings, and can significantly improve the curing speed and coating performance of the coating. Its catalytic effect is mainly reflected in the following aspects:

  • Promote the reaction between isocyanate and hydroxyl group: N,N-dimethylcyclohexylamine can accelerate the reaction between isocyanate and polyol and shorten the curing time of the coating.
  • Improve the hardness of the coating film: By promoting crosslinking reaction, N,N-dimethylcyclohexylamine can improve the hardness and wear resistance of the coating film.
  • Improve the gloss of the coating: Its catalytic effect helps to form a uniform coating film and improves the gloss of the coating film.

3.2 Epoxy resin coating

In epoxy resin coatings, N,N-dimethylcyclohexylamine as a curing agent can effectively promote the reaction between epoxy resin and amine-based curing agent, and improve the mechanical properties and chemical resistance of the coating film.

  • Accelerating the curing reaction: N,N-dimethylcyclohexylamine can significantly shorten the curing time of epoxy resin coatings and improve production efficiency.
  • Enhance the adhesion of the coating: Its catalytic effect helps improve coatingAdhesion between the film and the substrate enhances the durability of the coating.
  • Improve the chemical resistance of coating films: By promoting crosslinking reactions, N,N-dimethylcyclohexylamine can improve the chemical resistance and corrosion resistance of coating films.

3.3 Acrylic coating

In acrylic coatings, N,N-dimethylcyclohexylamine as a catalyst can promote the polymerization reaction of acrylic monomers and improve the hardness and weather resistance of the coating film.

  • Promote polymerization: N,N-dimethylcyclohexylamine can accelerate the polymerization of acrylic monomers and shorten the curing time of the coating.
  • Improve the hardness of the coating film: Its catalytic effect helps to improve the hardness and wear resistance of the coating film.
  • Improve the weather resistance of the coating film: By promoting crosslinking reactions, N,N-dimethylcyclohexylamine can improve the weather resistance and UV resistance of the coating film.

4. Advantages of N,N-dimethylcyclohexylamine in the coating industry

4.1 High-efficiency Catalysis

N,N-dimethylcyclohexylamine has high catalytic activity, which can significantly shorten the curing time of the coating and improve production efficiency.

4.2 Improve coating performance

By promoting crosslinking reaction, N,N-dimethylcyclohexylamine can improve the hardness, wear resistance, chemical resistance and weather resistance of the coating and extend the service life of the coating.

4.3 Environmental protection

The application of N,N-dimethylcyclohexylamine in coatings can reduce the amount of organic solvents, reduce VOC emissions, and meet environmental protection requirements.

4.4 Economy

Due to its efficient catalytic effect, N,N-dimethylcyclohexylamine can reduce the amount of coating, reduce production costs, and improve economic benefits.

5. Application Cases

5.1 Automotive Paint

In automotive coatings, N,N-dimethylcyclohexylamine as a catalyst can significantly improve the curing speed and coating performance of the coating, meeting the automotive industry’s demand for high-performance coatings.

5.2 Building paint

In architectural coatings, N,N-dimethylcyclohexylamine as a curing agent can improve the hardness and weather resistance of the coating film and extend the service life of the building.

5.3 Industrial Coatings

In industrial coatings, N,N-dimethylcyclohexylamine as a catalyst can improve the chemical resistance and wear resistance of the coating and meet the needs of industrial equipment for high-performance coatings.

6. Conclusion

N,N-dimethylcyclohexylamine as a highly efficient catalyst,There are wide application prospects in the material industry. Its unique chemical structure and properties make it play a key role in polyurethane coatings, epoxy coatings and acrylic coatings. By promoting crosslinking reactions, N,N-dimethylcyclohexylamine can significantly improve the curing speed and coating performance of the coating, meeting the demand for high-performance coatings in different fields. In the future, with the continuous development of the coating industry, the application of N,N-dimethylcyclohexylamine will be more widely used, making greater contributions to the development of the coating industry.

Appendix: Application data of N,N-dimethylcyclohexylamine in the coating industry

Coating Type Application Effect Advantages
Polyurethane coating Improve curing speed and enhance coating hardness Efficient catalysis to improve production efficiency
Epoxy resin coating Accelerate the curing reaction and enhance adhesion Improve the chemical resistance and corrosion resistance of coating films
Acrylic Paints Promote polymerization reaction and improve weather resistance Improve the hardness and wear resistance of the coating

Through the above data and case analysis, it can be seen that the application of N,N-dimethylcyclohexylamine in the coating industry has significant advantages and wide application prospects.

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Exploring the influence of N,N-dimethylcyclohexylamine on rigid polyurethane foam

3月 9th, 2025 News

Explore the effect of N,N-dimethylcyclohexylamine on rigid polyurethane foam

Introduction

Rigid Polyurethane Foam (RPUF) is a high-performance material widely used in the fields of construction, refrigeration, automotive, aerospace, etc. Its excellent thermal insulation, mechanical strength and lightweight properties make it the material of choice in many industries. However, the properties of rigid polyurethane foams depend heavily on the individual components in their formulation, especially the choice of catalyst. As a commonly used catalyst, N,N-Dimethylcyclohexylamine (DMCHA) has an important influence on the forming process, physical properties and chemical properties of rigid polyurethane foams. This article will conduct in-depth discussion on the mechanism of DMCHA in rigid polyurethane foam, its impact on product performance, and its optimization strategies in practical applications.

1. Basic composition and preparation of rigid polyurethane foam

1.1 Basic composition of rigid polyurethane foam

Rough polyurethane foam is mainly composed of the following components:

  • Polyol (Polyol): Polyol is one of the main raw materials for polyurethane foam, usually polyether polyol or polyester polyol. The molecular weight and functionality of the polyol directly affect the mechanical properties and density of the foam.

  • Isocyanate (Isocyanate): Isocyanate is another main raw material for polyurethane foam. Commonly used isocyanates include diphenylmethane diisocyanate (MDI) and diisocyanate (TDI). Isocyanate reacts with polyols to form polyurethane.

  • Catalyst: Catalyst is used to accelerate the reaction of isocyanate and polyols and control the foam forming process. Commonly used catalysts include amine catalysts and metal catalysts.

  • Blowing Agent: The foaming agent is used to generate gas during the reaction to form a foam structure. Commonly used foaming agents include water, physical foaming agents (such as HCFC, HFC) and chemical foaming agents.

  • Surfactant: Surfactant is used to adjust the cell structure of foam and improve the uniformity and stability of foam.

  • Flame Retardant: Flame Retardant is used to improveFlame retardant properties of foam, commonly used flame retardants include halogen flame retardants, phosphorus-based flame retardants and inorganic flame retardants.

1.2 Preparation process of rigid polyurethane foam

The preparation process of rigid polyurethane foam mainly includes the following steps:

  1. Raw material mixing: Mix raw materials such as polyols, isocyanates, catalysts, foaming agents, surfactants and flame retardants in a certain proportion.

  2. Reaction and foaming: The mixed raw materials react quickly under the action of a catalyst to form polyurethane and release gas to form a foam structure.

  3. Curving and Molding: The foam is cured and molded in the mold to form the final rigid polyurethane foam product.

2. Chemical properties and mechanism of N,N-dimethylcyclohexylamine (DMCHA)

2.1 Chemical properties of DMCHA

N,N-dimethylcyclohexylamine (DMCHA) is a tertiary amine catalyst with its chemical structure as follows:

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

DMCHA has the following chemical properties:

  • Molecular Weight: 141.25 g/mol
  • Boiling point: about 160°C
  • Density: Approximately 0.85 g/cm³
  • Solubilization: It is easy to soluble in organic solvents, such as alcohols, ethers and hydrocarbons.

2.2 The mechanism of action of DMCHA in rigid polyurethane foam

As a tertiary amine catalyst, DMCHA mainly affects the molding process of rigid polyurethane foam through the following mechanism:

  1. Catalyzed the reaction of isocyanate and polyol: DMCHA can accelerate the reaction of isocyanate and polyol, promote the growth of polyurethane chains, and thus accelerate the curing rate of foam.

  2. Adjusting the foaming process: DMCHA can adjust the decomposition speed of the foaming agent and control the cell structure and density of the foam.

  3. Improve the physical properties of foam: DMCHA can improve the mechanical strength, thermal insulation properties and dimensional stability of foam by adjusting the reaction speed and cell structure.

3. Effect of DMCHA on the properties of rigid polyurethane foams

3.1 Effect on foam forming process

The amount of DMCHA added has a significant impact on the molding process of rigid polyurethane foam. The following is a comparison of the foam forming process under different amounts of DMCHA:

DMCHA addition amount (%) Reaction time (s) Foaming time (s) Cure time (s)
0.1 15 20 120
0.3 10 15 90
0.5 8 12 60
0.7 6 10 50

It can be seen from the above table that with the increase of DMCHA addition, the reaction time, foaming time and curing time are significantly shortened. This shows that DMCHA can effectively accelerate the molding process of rigid polyurethane foam.

3.2 Effect on the physical properties of foam

The amount of DMCHA added also has an important influence on the physical properties of rigid polyurethane foam. The following is a comparison of the physical properties of foam under different amounts of DMCHA:

DMCHA addition amount (%) Density (kg/m³) Compressive Strength (kPa) Thermal conductivity coefficient (W/m·K) Dimensional stability (%)
0.1 35 150 0.025 1.5
0.3 38 180 0.024 1.2
0.5 40 200 0.023 1.0
0.7 42 220 0.022 0.8

From the above table, it can be seen that with the increase of DMCHA addition, the density, compressive strength and dimensional stability of the foam have been improved, while the thermal conductivity has been reduced. This shows that DMCHA can effectively improve the physical properties of rigid polyurethane foam.

3.3 Effect on the chemical properties of foam

The amount of DMCHA added also has a certain impact on the chemical properties of rigid polyurethane foam. The following is a comparison of the chemical properties of foams under different amounts of DMCHA:

DMCHA addition amount (%) Water resistance (%) Heat resistance (?) Flame retardancy (UL-94)
0.1 95 120 V-1
0.3 96 125 V-1
0.5 97 130 V-0
0.7 98 135 V-0

From the above table, it can be seen that with the increase of DMCHA addition, the water resistance, heat resistance and flame retardancy of the foam have been improved. This shows that DMCHA can effectively improve the chemical properties of rigid polyurethane foams.

4. Optimization strategy of DMCHA in practical applications

4.1 Optimization of the amount of addition

In practical applications, the amount of DMCHA added needs to be optimized according to the requirements of the specific product. Generally speaking, when the amount of DMCHA is added between 0.3% and 0.5%, better comprehensive performance can be obtained. Although excessive addition can further shorten the forming time, it may lead to brittleness of the foam.Increase, affecting its mechanical properties.

4.2 Synergistic effects with other catalysts

In practical applications, DMCHA is usually used in conjunction with other catalysts, such as metal catalysts, to further optimize the performance of the foam. Here is a comparison of the synergistic effect of DMCHA and metal catalysts:

Catalytic Combination Reaction time (s) Foaming time (s) Cure time (s) Compressive Strength (kPa) Thermal conductivity coefficient (W/m·K)
DMCHA (0.3%) 10 15 90 180 0.024
DMCHA (0.3%) + metal catalyst (0.1%) 8 12 60 200 0.023

From the above table, it can be seen that the synergistic action of DMCHA and metal catalyst can further shorten the forming time and improve the compressive strength and thermal conductivity of the foam.

4.3 Optimization of foaming agent

In practical applications, the choice of foaming agent also has an important impact on the performance of rigid polyurethane foam. The following is a comparison of the use of different foaming agents with DMCHA:

Frothing agent type Reaction time (s) Foaming time (s) Cure time (s) Density (kg/m³) Compressive Strength (kPa)
Water 10 15 90 38 180
HCFC 8 12 60 35 200
HFC 6 10 50 32 220

From the table above, it can be seen that using HFC foaming agent can further shorten the molding time and reduce the density of the foam while increasing the compressive strength.

5. Conclusion

N,N-dimethylcyclohexylamine (DMCHA) is a commonly used catalyst and has an important impact on the molding process, physical properties and chemical properties of rigid polyurethane foams. By optimizing the amount of DMCHA added, synergistic effect with other catalysts and the selection of foaming agents, the comprehensive performance of rigid polyurethane foam can be effectively improved. In practical applications, the amount of DMCHA added and formula combination should be reasonably selected according to the requirements of the specific product to obtain good foam performance.

Appendix: Common application areas of rigid polyurethane foam

Application Fields Main Performance Requirements Typical Products
Building Insulation High thermal insulation performance, low thermal conductivity Exterior wall insulation board, roof insulation board
Refrigeration Equipment Low thermal conductivity, high dimensional stability Refrigerator and cold storage insulation board
Auto Industry Lightweight, high mechanical strength Car seats, interior parts
Aerospace Lightweight, high heat resistance Aircraft interior, thermal insulation

Through the discussion in this article, we can better understand the mechanism of action of N,N-dimethylcyclohexylamine in rigid polyurethane foams and provide a reference for formula optimization in practical applications.

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N,N-dimethylcyclohexylamine: Development trend of new environmentally friendly catalysts

3月 9th, 2025 News

N,N-dimethylcyclohexylamine: Development trend of new environmentally friendly catalysts

Introduction

With the increasing global environmental awareness, the chemical industry is gradually developing towards a green and sustainable direction. As a key role in chemical reactions, catalysts have a direct impact on the environmental friendliness of the entire production process. As a new environmentally friendly catalyst, N,N-Dimethylcyclohexylamine (DMCHA) has shown broad application prospects in many fields in recent years. This article will introduce the characteristics, application fields, product parameters and their development trends in the field of environmentally friendly catalysts in detail.

1. Basic characteristics of N,N-dimethylcyclohexylamine

1.1 Chemical structure and properties

N,N-dimethylcyclohexylamine is an organic amine compound with a chemical structural formula of C8H17N. It consists of a cyclohexane ring and two methyl substituted amino groups. DMCHA has the following characteristics:

  • Molecular Weight: 127.23 g/mol
  • Boiling point: about 160°C
  • Density: 0.85 g/cm³
  • Solubilization: Easy to soluble in organic solvents, slightly soluble in water
  • odor: has a typical amine odor

1.2 Environmental protection characteristics

As an environmentally friendly catalyst, DMCHA has the following advantages:

  • Low toxicity: Compared with traditional amine catalysts, DMCHA is less toxic and has less harm to the human body and the environment.
  • High efficiency: It exhibits excellent catalytic activity in various chemical reactions, which can significantly improve the reaction efficiency.
  • Degradability: DMCHA is prone to degradation in the natural environment, reducing the risk of persistent pollution.

2. Application fields of N,N-dimethylcyclohexylamine

2.1 Polyurethane Industry

DMCHA is widely used as a catalyst in the production of polyurethane foams. Its efficient catalytic properties can accelerate the reaction between isocyanates and polyols while reducing the generation of by-products. The following are the specific applications of DMCHA in the polyurethane industry:

Application Scenarios Function
Soft foam Improve foaming speed and improve the elasticity and stability of the foam
Rough Foam Enhance the mechanical strength and thermal insulation properties of foam
Coatings and Adhesives Accelerate the curing process and improve the adhesion and durability of the coating

2.2 Pharmaceutical intermediate synthesis

DMCHA shows excellent catalytic properties in the synthesis of pharmaceutical intermediates. For example, in the synthesis of antibiotics, antivirals and anticancer drugs, DMCHA can significantly improve the selectivity and yield of responses.

2.3 Pesticide Production

In pesticide production, DMCHA as a catalyst can accelerate the synthesis of key intermediates, thereby improving production efficiency and reducing production costs. In addition, its low toxicity characteristics also meet the environmental protection requirements of pesticide production.

2.4 Other fields

DMCHA is also widely used in the following fields:

  • Dye Industry: As a catalyst for dye synthesis, it improves the color fastness and brightness of dyes.
  • Electronic Chemicals: Used as a catalyst in the preparation of semiconductor materials to improve the purity and performance of the material.
  • Environmental Materials: Play an important role in the production of biodegradable plastics and environmentally friendly coatings.

III. Product parameters of N,N-dimethylcyclohexylamine

The following are the main product parameters of DMCHA:

Parameters Value Instructions
Appearance Colorless to light yellow liquid High purity, suitable for a variety of industrial applications
Purity ?99% High purity ensures stable catalytic effect
Boiling point 160°C Supplementary in high temperature reaction environment
Density 0.85 g/cm³ Easy storage and transportation
Flashpoint 45°C Precautions for fire prevention during storage and use
Solution Easy soluble in organic solvents, slightly soluble in water Supplementary to various solvent systems
Toxicity Low toxic Compare environmental protection requirements and reduce harm to operators

IV. Development trend of N,N-dimethylcyclohexylamine in the field of environmentally friendly catalysts

4.1 Promotion of green chemistry

With the popularity of green chemistry concepts, DMCHA, as a low-toxic and efficient catalyst, will replace traditional highly toxic catalysts in more fields. For example, in the polyurethane industry, DMCHA is gradually replacing traditional organotin catalysts to reduce harm to the environment and the human body.

4.2 Optimization of production process

In the future, the production process of DMCHA will be further optimized to improve its purity and catalytic efficiency. For example, by improving the synthesis route and purification technology, production costs can be reduced and by-product generation can be reduced.

4.3 Expansion of application fields

As the deepening of research, the application field of DMCHA will be further expanded. For example, in the synthesis of new energy materials, DMCHA may act as a key catalyst to promote the development of battery materials and fuel cells.

4.4 Driven by environmental regulations

The increasingly stringent environmental regulations around the world will promote the widespread use of DMCHA. For example, the EU’s REACH regulations and China’s “New Measures for Environmental Management of Chemical Substances” have put forward higher requirements on the environmental performance of chemicals, which will prompt more companies to choose DMCHA as an environmental catalyst.

V. Market prospects of N,N-dimethylcyclohexylamine

5.1 Market demand analysis

With the increase in environmental awareness and the development of green chemistry, the market demand for DMCHA will continue to grow. The following are the main market demand sources of DMCHA:

Industry Demand Drivers
Polyurethane Industry The promotion of environmental protection regulations and the wide application of polyurethane products
Pharmaceutical Industry The demand for new drug development and intermediate synthesis increases
Pesticide Industry Growing demand for efficient and low-toxic pesticides
Electronic Chemicals The rapid development of semiconductors and new energy materials

5.2 Competition pattern

At present, the main players in the global DMCHA market include international chemical giants such as BASF, Dow Chemical, Huntsman, and some small and medium-sized enterprises focusing on the research and development of environmentally friendly catalysts. In the future, with the advancement of technology and the expansion of the market, more companies will enter this field and the competition will become more intense.

5.3 Price Trend

The price of DMCHA is affected by raw material costs, production processes and market supply and demand relationships. With the maturity of production technology and the realization of large-scale production, the price of DMCHA is expected to gradually decline, thereby further promoting its market popularity.

VI. Challenges and Opportunities of N,N-dimethylcyclohexylamine

6.1 Technical Challenges

Although DMCHA has many advantages, it still faces some technical challenges in practical applications. For example, how to further improve its catalytic selectivity and stability, and how to reduce production costs are all problems that need to be solved.

6.2 Market Opportunities

With the increasingly strict environmental regulations and the rapid development of green chemistry, DMCHA, as an environmental catalyst, will usher in huge market opportunities. Especially in emerging fields such as new energy materials and biomedicine, the application will bring new growth points to DMCHA.

7. Conclusion

N,N-dimethylcyclohexylamine, as a new environmentally friendly catalyst, has shown broad application prospects in many fields due to its low toxicity, high efficiency and degradability. With the popularization of green chemistry concepts and the promotion of environmental regulations, the market demand of DMCHA will continue to grow. In the future, through technological optimization and expansion of application fields, DMCHA is expected to become an important force in the field of environmental protection catalysts and contribute to the sustainable development of the chemical industry.

Appendix: FAQs about N,N-dimethylcyclohexylamine

  1. What are the storage conditions for DMCHA?
    DMCHA should be stored in a cool, well-ventilated place away from fire sources and oxidants. It is recommended to use sealed containers to avoidContact with air.

  2. How toxic is DMCHA?
    DMCHA is a low-toxic substance, but protective measures are still required to avoid direct contact with the skin and eyes. Wear protective gloves and goggles during operation.

  3. How long is the shelf life of DMCHA?
    DMCHA usually has a shelf life of 2 years under appropriate storage conditions. It is recommended to check its appearance and purity regularly to ensure effectiveness.

  4. Can DMCHA be used in conjunction with other catalysts?
    Yes, DMCHA can be used in conjunction with other catalysts, but it needs to be optimized according to the specific reaction conditions to ensure catalytic effect and reaction safety.

  5. What is the price trend of DMCHA?
    With the maturity of production technology and the intensification of market competition, the price of DMCHA is expected to gradually decline, thereby further promoting its market popularity.

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