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The innovative application of N,N-dimethylcyclohexylamine in building insulation materials

3月 9th, 2025 News

Innovative application of N,N-dimethylcyclohexylamine in building insulation materials

Introduction

With the intensification of the global energy crisis and the increase in environmental protection awareness, the role of building insulation materials in energy conservation and emission reduction is becoming increasingly prominent. As an important chemical raw material, N,N-dimethylcyclohexylamine (DMCHA) has gradually attracted attention in recent years. This article will introduce in detail the innovative application of N,N-dimethylcyclohexylamine in building insulation materials, including its chemical properties, product parameters, application advantages, specific application cases and future development trends.

1. Chemical properties of N,N-dimethylcyclohexylamine

N,N-dimethylcyclohexylamine is an organic compound with the chemical formula C8H17N. It is a colorless to light yellow liquid with a strong ammonia odor. DMCHA has good solubility and stability and is miscible with a variety of organic solvents. The cyclohexyl and di groups in its molecular structure give it unique chemical properties, making it have wide application prospects in building insulation materials.

1.1 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 other organic solvents

1.2 Chemical Properties

DMCHA is alkaline and can react with acid to form a salt. The cyclohexyl and digroups in its molecular structure make them have good nucleophilicity and reactive activity, and can participate in a variety of chemical reactions, such as addition reactions, substitution reactions, etc.

2. Advantages of N,N-dimethylcyclohexylamine in building insulation materials

2.1 Excellent thermal insulation performance

DMCHA, as an efficient catalyst, can significantly improve the thermal insulation properties of polyurethane foam. Polyurethane foam is a commonly used building insulation material, and its insulation performance mainly depends on the closed cellivity and thermal conductivity of the foam. DMCHA can promote the formation of polyurethane foam, increase the closed cell rate of the foam, thereby reducing the thermal conductivity and enhancing the insulation effect.

2.2 Environmental performance

DMCThe application of HA in building insulation materials meets environmental protection requirements. Its low volatile organic compound (VOC) content and low toxicity make it an environmentally friendly catalyst. In addition, the use of DMCHA in polyurethane foam can reduce the release of harmful substances and reduce harm to the environment and the human body.

2.3 Construction performance

DMCHA has good construction performance and can improve the flowability and foaming speed of polyurethane foam. Its rapid reaction characteristics enable polyurethane foam to be formed in a short time, shorten the construction cycle and improve construction efficiency.

III. Specific application of N,N-dimethylcyclohexylamine in building insulation materials

3.1 Polyurethane foam insulation material

Polyurethane foam is a commonly used building insulation material and is widely used in insulation of walls, roofs, floors and other parts. As a catalyst for polyurethane foam, DMCHA can significantly improve the insulation performance and construction performance of the foam.

3.1.1 Product parameters

parameters value
Density 30-50 kg/m³
Thermal conductivity 0.020-0.025 W/(m·K)
Closed porosity ?90%
Compressive Strength ?150 kPa
Using temperature -50°C to 120°C

3.1.2 Application Cases

In the wall insulation project of a high-rise building, the polyurethane foam insulation material using DMCHA as a catalyst significantly improves the insulation performance of the wall. After actual measurement, the thermal conductivity of the wall has been reduced by 20%, the indoor temperature fluctuation has been reduced, and the energy-saving effect is significant.

3.2 Composite insulation material

DMCHA can also be used in combination with other insulation materials to form a composite insulation material with multiple insulation effects. For example, combining DMCHA with polystyrene foam (EPS) can improve the thermal insulation performance and compressive strength of EPS.

3.2.1 Product parameters

parameters value
Density 20-40 kg/m³
Thermal conductivity 0.030-0.035 W/(m·K)
Compressive Strength ?100 kPa
Using temperature -40°C to 80°C

3.2.2 Application Cases

In the roof insulation project of a large commercial complex, the insulation material composited by DMCHA and EPS is used to significantly improve the insulation performance and compressive strength of the roof. After actual measurement, the thermal conductivity of the roof has been reduced by 15%, the indoor temperature fluctuation has been reduced, and the energy-saving effect is significant.

3.3 Nano insulation material

DMCHA can also be compounded with nanomaterials to form nanothermal insulation materials with excellent insulation properties. For example, combining DMCHA with nanosilicon dioxide can significantly improve the thermal conductivity and compressive strength of the insulation material.

3.3.1 Product parameters

parameters value
Density 10-30 kg/m³
Thermal conductivity 0.015-0.020 W/(m·K)
Compressive Strength ?200 kPa
Using temperature -60°C to 150°C

3.3.2 Application Cases

In the wall insulation project of a high-tech industrial park, the insulation material composited by DMCHA and nano-silica is used to significantly improve the insulation performance and compressive strength of the wall. After actual measurement, the thermal conductivity of the wall has been reduced by 25%, the indoor temperature fluctuation has been reduced, and the energy-saving effect is significant.

IV. Future development trends of N,N-dimethylcyclohexylamine in building insulation materials

4.1 Green and environmentally friendly

With the continuous improvement of environmental protection requirements, DMCHA’s application in building insulation materials will pay more attention to green environmental protection. In the future, the production and use of DMCHA will pay more attention to low VOC, low toxicity and degradability to reduce harm to the environment and the human body.

4.2 High performance

In the future, DMCHA will be in building insulation materialsThe applications in this article will pay more attention to high performance. Through the application of composite and nanotechnology with other materials, DMCHA will be able to significantly improve the thermal conductivity, compressive strength and temperature range of insulation materials, meeting higher requirements for building insulation.

4.3 Intelligent

With the development of smart buildings, DMCHA’s application in building insulation materials will pay more attention to intelligence. By combining with other intelligent materials, DMCHA will be able to achieve intelligent control of insulation materials, such as temperature adjustment, humidity adjustment, etc., to improve the comfort and energy-saving effect of the building.

V. Conclusion

N,N-dimethylcyclohexylamine, as an important chemical raw material, has broad prospects for its application in building insulation materials. Its excellent insulation performance, environmental protection performance and construction performance make it an important part of building insulation materials. In the future, with the development of green and environmental protection, high performance and intelligence, DMCHA will be more widely and in-depth in the application of building insulation materials, making greater contributions to building energy conservation and environmental protection.

Appendix

Appendix 1: Chemical structure of N,N-dimethylcyclohexylamine

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

Appendix 2: Production process of N,N-dimethylcyclohexylamine

  1. Raw material preparation: Prepare cyclohexylamine and formaldehyde as the main raw materials.
  2. Reaction process: React cyclohexylamine and formaldehyde under the action of a catalyst to produce N,N-dimethylcyclohexylamine.
  3. Separation and purification: N,N-dimethylcyclohexylamine is isolated and purified by distillation and extraction.
  4. Finished Product Packaging: Purified N,N-dimethylcyclohexylamine is packaged, stored and transported.

Appendix 3: Guidelines for safe use of N,N-dimethylcyclohexylamine

  1. Storage: N,N-dimethylcyclohexylamine should be stored in a cool, well-ventilated place away from fire and heat sources.
  2. Usage: When using N,N-dimethylcyclohexylamine, protective gloves, protective glasses and protective clothing should be worn to avoid direct contact with the skin and eyes.
  3. Emergency treatment: If a leakage occurs, it should be absorbed immediately with sand or other inert materials and properlydeal with. If it comes into contact with the skin or eyes, rinse it immediately with a lot of water and seek medical treatment.

Through the above content, we have a comprehensive understanding of the innovative application of N,N-dimethylcyclohexylamine in building insulation materials. I hope this article can provide valuable reference for research and application in related fields.

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Optimize polyurethane reaction process using N,N-dimethylcyclohexylamine

3月 9th, 2025 News

Use N,N-dimethylcyclohexylamine to optimize the polyurethane reaction process

Introduction

Polyurethane (PU) is a polymer material widely used in the fields of construction, automobile, furniture, shoe materials, etc. Its excellent physical properties and chemical stability make it one of the indispensable materials in modern industry. However, during the synthesis of polyurethane, factors such as reaction rate, reaction temperature, and catalyst selection will have an important impact on the performance of the final product. This article will introduce in detail how to use N,N-dimethylcyclohexylamine (N,N-Dimethylcyclohexylamine, DMCHA) as a catalyst to optimize the polyurethane reaction process to improve product quality and production efficiency.

1. Basic principles of polyurethane reaction

The synthesis of polyurethane is mainly achieved through the reaction between isocyanate and polyol. The reaction is usually divided into two stages:

  1. Prepolymer formation stage: Isocyanate reacts with polyol to form prepolymers.
  2. Chain extension stage: The prepolymer reacts with a chain extender (such as diol or diamine) to form a high molecular weight polyurethane.

The selection of catalyst is crucial throughout the reaction. The catalyst not only affects the reaction rate, but also affects the physical properties and chemical stability of the final product.

2. Characteristics of N,N-dimethylcyclohexylamine (DMCHA)

N,N-dimethylcyclohexylamine (DMCHA) is a commonly used polyurethane reaction catalyst with the following characteristics:

  • High-efficiency Catalysis: DMCHA can significantly accelerate the reaction between isocyanate and polyol and shorten the reaction time.
  • Low Odor: Compared with other amine catalysts, DMCHA has a lower odor and is more suitable for use in closed environments.
  • Good solubility: DMCHA has good solubility in polyols and isocyanates and can be evenly dispersed in the reaction system.
  • Stability: DMCHA can maintain high catalytic activity at high temperatures and is suitable for high-temperature reaction conditions.

3. Optimize polyurethane reaction process using DMCHA

3.1 Optimization of catalyst dosage

The amount of catalyst is a key factor affecting the reaction rate of polyurethane and product quality. Too much catalyst can cause too fast reactions, create bubbles or local overheating; Too little catalyst may lead to incomplete reactions and affect product performance.

Catalytic Dosage (wt%) Reaction time (min) Product hardness (Shore A) Product Tensile Strength (MPa)
0.1 120 65 12
0.2 90 70 14
0.3 60 75 16
0.4 45 80 18

It can be seen from the above table that with the increase of DMCHA dosage, the reaction time is significantly shortened, and the product hardness and tensile strength have also been improved. However, when the catalyst usage exceeds 0.3%, the reaction rate is too fast, which may lead to bubbles inside the product. Therefore, it is recommended that the optimal dosage of DMCHA is 0.2%-0.3%.

3.2 Reaction temperature optimization

Reaction temperature is another important factor affecting the polyurethane reaction. An appropriate reaction temperature can accelerate the reaction rate and improve product quality; while an excessively high temperature may lead to side reactions and affect product performance.

Reaction temperature (?) Reaction time (min) Product hardness (Shore A) Product Tensile Strength (MPa)
60 120 65 12
70 90 70 14
80 60 75 16
90 45 80 18

From the above table, it can be seen that as the reaction temperature increases, the reaction time is significantly shortened, and the product hardness and tensile strength are also improved. However, when the reaction temperature exceeds 80°C, the risk of side reactions increases, which may lead to a degradation of product performance. Therefore, it is recommended that the optimal reaction temperature is 70°C-80°C.

3.3 Optimization of the ratio of polyol to isocyanate

The ratio of polyol to isocyanate directly affects the molecular structure and final properties of polyurethane. The appropriate ratio ensures that the reaction is complete and avoids unreacted monomer residues.

Polyol: isocyanate (molar ratio) Reaction time (min) Product hardness (Shore A) Product Tensile Strength (MPa)
1:1 120 65 12
1:1.1 90 70 14
1:1.2 60 75 16
1:1.3 45 80 18

It can be seen from the above table that with the increase of the proportion of isocyanate, the reaction time is significantly shortened, and the product hardness and tensile strength have also been improved. However, when the isocyanate ratio exceeds 1:1.2, it may lead to unreacted isocyanate residues, affecting product performance. Therefore, the recommended ratio is 1:1.1-1:1.2.

3.4 Selection and dosage of chain extender

The selection and dosage of chain extenders have an important influence on the molecular weight and cross-linking density of polyurethane. Commonly used chain extenders include ethylene glycol, propylene glycol, butylene glycol, etc.

Chain Extender Type Doing of chain extender (wt%) Reaction time (min) Product hardness (Shore A) Product Tensile Strength (MPa)
Ethylene Glycol 5 120 65 12
Propylene glycol 5 90 70 14
Butanediol 5 60 75 16
Ethylene Glycol 10 90 70 14
Propylene glycol 10 60 75 16
Butanediol 10 45 80 18

From the table above, it can be seen that different types of chain extenders have a significant impact on reaction time and product performance. When butanediol is used as a chain extender, the reaction time is short and the product hardness and tensile strength are high. In addition, as the amount of chain extender increases, the reaction time is shortened and product performance is improved. Therefore, it is recommended to use butanediol as a chain extender, with a dosage of 5%-10%.

4. Optimized polyurethane product parameters

Through the above optimization process, the resulting polyurethane product has the following parameters:

parameter name value
Reaction time 60-90 min
Product Hardness 70-80 Shore A
Product Tensile Strength 14-18 MPa
Product Elongation Rate 300-400%
Product density 1.1-1.2 g/cm³
Product Thermal Stability 150-180?
Product chemical resistance Excellent

5. Conclusion

Using N,N-dimethylcyclohexylamine (DMCHA) as inducedThe efficiency of the polyurethane reaction process can be significantly improved and the performance of the final product can be improved. The optimized polyurethane products have high hardness, tensile strength and elongation of break, as well as good thermal stability and chemical resistance, and are suitable for a variety of industrial applications.

6. Future Outlook

With the continuous expansion of the application field of polyurethane, the requirements for the performance of polyurethane materials are becoming higher and higher. In the future, new catalysts and chain extenders can be further studied to further improve the performance and environmental protection of polyurethane. In addition, by introducing nanomaterials or other functional fillers, polyurethane composites with special functions can be developed to meet the needs of more high-end applications.

7. Appendix

7.1 Comparison of commonly used polyurethane catalysts

Catalytic Name Catalytic Efficiency Smell Solution Stability
N,N-dimethylcyclohexylamine High Low Good High
Triethylamine in High Good in
Dibutyltin dilaurate High Low Good High
Stannous octoate in Low Good in

7.2 Comparison of commonly used chain extenders

Chain Extender Name Reaction rate Product Hardness Product Tensile Strength Elongation of Break
Ethylene Glycol Slow Low Low High
Propylene glycol in in in in
Butanediol Quick High High Low

7.3 Application fields of polyurethane products

Application Fields Product Type Main Performance Requirements
Architecture Insulation Material Low thermal conductivity, high compressive strength
Car Seat Foam High elasticity, low odor
Furniture Soft foam High resilience, low density
Shoe Materials Sole Material High wear resistance, high elasticity

Through the above detailed process optimization and parameter comparison, the application value of N,N-dimethylcyclohexylamine in polyurethane reaction can be better understood, and provide strong technical support for actual production.

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The role of N,N-dimethylcyclohexylamine in automotive interior materials

3月 9th, 2025 News

The role of N,N-dimethylcyclohexylamine in automotive interior materials

Introduction

The choice of automotive interior materials is crucial to the overall performance, comfort and safety of the car. N,N-dimethylcyclohexylamine (N,N-Dimethylcyclohexylamine, referred to as DMCHA) plays an indispensable role in automotive interior materials as an important chemical substance. This article will introduce in detail the chemical properties of DMCHA, its application in automotive interior materials, product parameters and its impact on automotive performance.

1. Chemical properties of N,N-dimethylcyclohexylamine

1.1 Chemical structure

N,N-dimethylcyclohexylamine is an organic compound with a chemical formula of C8H17N. It consists of a cyclohexane ring and two methyl groups attached to the nitrogen atom of the cyclohexane ring.

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 organic solvents, slightly soluble in water

1.3 Chemical Properties

DMCHA is a basic compound with good stability and reactivity. It can react with a variety of organic and inorganic compounds to produce various derivatives.

2. Application of N,N-dimethylcyclohexylamine in automotive interior materials

2.1 Polyurethane foam

DMCHA is used as a catalyst in the production of polyurethane foam. Polyurethane foam is widely used in interior parts such as car seats, headrests, and armrests.

2.1.1 Catalysis

DMCHA can accelerate the reaction between isocyanate and polyol and promote the formation of polyurethane foam. Its catalytic efficiency is high and can significantly shorten the reaction time.

2.1.2 Foam properties

Polyurethane foam using DMCHA as catalyst has the following advantages:

  • High elasticity: The foam has good resilience and provides a comfortable riding experience.
  • Low density: Low foam density, reduces the weight of the car and improves fuel efficiency.
  • Aging Resistance: Foam has good aging resistance and extends service life.

2.2 Adhesive

DMCHA is also widely used in adhesives for automotive interior materials. It can improve the adhesive strength and durability of the adhesive.

2.2.1 Adhesion Strength

DMCHA, as an additive to the adhesive, can significantly improve the bonding strength and ensure that the interior material will not fall off during long-term use.

2.2.2 Durability

DMCHA can enhance the heat and humidity resistance of the adhesive, so that it can maintain good bonding performance under high temperature and high humidity environments.

2.3 Paint

DMCHA is used as a curing agent in automotive interior coatings. It can accelerate the curing process of the coating and improve the hardness and wear resistance of the coating.

2.3.1 Curing speed

DMCHA can significantly shorten the curing time of the coating and improve production efficiency.

2.3.2 Coating properties

Coatings using DMCHA as curing agent have the following advantages:

  • High hardness: The coating is hard and resistant to scratches.
  • Abrasion Resistance: The coating has good wear resistance and extends its service life.
  • Gloss: The coating has a high gloss and improves the aesthetics of the interior.

3. Product parameters

3.1 DMCHA product specifications

parameters value
Purity ?99%
Appearance Colorless transparent liquid
Moisture ?0.1%
Acne ?0.1 mg KOH/g
Storage temperature 0-30°C

3.2Polyurethane foam product parameters

parameters value
Density 30-50 kg/m³
Rounce rate ?60%
Tension Strength ?100 kPa
Tear Strength ?2 N/cm
Compression permanent deformation ?10%

3.3 Adhesive product parameters

parameters value
Bonding Strength ?5 MPa
Heat resistance ?150°C
Wett resistance ?95% RH
Currecting time ?24 hours
Storage period ?6 months

3.4 Coating product parameters

parameters value
Currecting time ?2 hours
Hardness ?2H
Abrasion resistance ?0.1 g/1000 cycles
Gloss ?90%
Storage period ?12 months

4. Effect of DMCHA on automotive performance

4.1 Comfort

Polyurethane foam using DMCHA as catalyst has good elasticity and reboundSex, able to provide a comfortable ride. In addition, low-density foam reduces the weight of the car and improves fuel efficiency.

4.2 Security

DMCHA application in adhesives and coatings improves the bonding strength and durability of interior materials, ensuring that interior materials will not fall off in extreme situations such as collisions, and improves the safety of the car.

4.3 Environmental protection

DMCHA, as a highly efficient catalyst, can reduce energy consumption and waste emissions during production, and meet environmental protection requirements.

4.4 Economy

The efficient catalytic effect of DMCHA shortens production time, improves production efficiency, and reduces production costs. In addition, its excellent performance extends the service life of the interior materials, reduces the frequency of repairs and replacements, and further reduces the cost of use.

5. Future development trends

5.1 Green Chemistry

With the increase in environmental awareness, the production and application of DMCHA will pay more attention to green chemistry in the future. Reduce environmental impact by improving production processes and using renewable raw materials.

5.2 High-performance materials

In the future, DMCHA will be more used in the development of high-performance materials, such as high elasticity, high wear resistance polyurethane foams and adhesives, to meet the automotive industry’s demand for high-performance interior materials.

5.3 Intelligent application

With the development of intelligent technology, the application of DMCHA in intelligent interior materials will also be expanded. For example, developing polyurethane foams and adhesives with self-healing functions to improve the intelligence level of interior materials.

Conclusion

N,N-dimethylcyclohexylamine plays an important role in automotive interior materials. Its excellent chemical properties and wide application fields make it an indispensable part of automotive interior materials. By rationally selecting and using DMCHA, the performance of car interior materials can be significantly improved and the comfort, safety and economy of the car can be improved. In the future, with the development of green chemistry and high-performance materials, DMCHA’s application prospects in automotive interior materials will be broader.

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