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The Role of N,N-dimethylcyclohexylamine in High-Performance Rigid Foam Production

admin 3月 29th, 2025 News

The Role of N,N-Dimethylcyclohexylamine in High-Performance Rigid Foam Production

Introduction

N,N-dimethylcyclohexylamine (DMCHA) is a versatile and essential chemical compound used in various industries, particularly in the production of high-performance rigid foams. This amine catalyst plays a pivotal role in enhancing the performance, efficiency, and sustainability of foam formulations. In this comprehensive article, we will delve into the significance of DMCHA in rigid foam production, exploring its properties, applications, and the latest advancements in the field. We will also provide an overview of relevant product parameters, compare it with other catalysts, and discuss the environmental and economic implications of using DMCHA.

What is N,N-Dimethylcyclohexylamine?

N,N-dimethylcyclohexylamine, commonly abbreviated as DMCHA, is an organic compound with the molecular formula C8H17N. It belongs to the class of tertiary amines and is characterized by its cyclohexane ring structure, which imparts unique chemical and physical properties. DMCHA is a colorless to pale yellow liquid with a mild, fishy odor. Its boiling point is approximately 204°C, and it has a density of about 0.86 g/cm³ at room temperature.

Why is DMCHA Important in Rigid Foam Production?

Rigid foams are widely used in construction, insulation, packaging, and automotive industries due to their excellent thermal insulation properties, mechanical strength, and durability. However, producing high-quality rigid foams requires precise control over the chemical reactions that occur during the foaming process. This is where DMCHA comes into play. As a potent amine catalyst, DMCHA accelerates the reaction between polyols and isocyanates, which are the two main components of polyurethane (PU) foams. By fine-tuning the reactivity of these components, DMCHA ensures that the foam forms uniformly, with optimal cell structure and minimal shrinkage.

Moreover, DMCHA offers several advantages over other catalysts, such as:

Faster Cure Time: DMCHA significantly reduces the time required for the foam to cure, leading to increased production efficiency.
Improved Cell Structure: The use of DMCHA results in finer, more uniform cells, which enhances the foam’s insulating properties and mechanical strength.
Enhanced Dimensional Stability: DMCHA helps maintain the foam’s shape and size during and after curing, reducing the risk of warping or cracking.
Lower VOC Emissions: Compared to some traditional catalysts, DMCHA produces fewer volatile organic compounds (VOCs), making it a more environmentally friendly option.

Properties of N,N-Dimethylcyclohexylamine

To fully understand the role of DMCHA in rigid foam production, it is essential to examine its key properties in detail. The following table summarizes the most important characteristics of DMCHA:

Property	Value
Molecular Formula	C8H17N
Molecular Weight	127.23 g/mol
Appearance	Colorless to pale yellow liquid
Odor	Mild, fishy
Boiling Point	204°C
Melting Point	-54°C
Density (at 25°C)	0.86 g/cm³
Solubility in Water	Slightly soluble
Flash Point	96°C
Autoignition Temperature	340°C
Viscosity (at 25°C)	4.5 mPa·s
pH (1% solution)	11.5-12.5

Chemical Reactivity

DMCHA is a strong base and exhibits significant catalytic activity in various chemical reactions. In the context of rigid foam production, its primary function is to accelerate the urethane-forming reaction between polyols and isocyanates. This reaction is crucial for the formation of the foam’s polymer matrix, which provides the foam with its structural integrity and insulating properties.

The catalytic mechanism of DMCHA involves the donation of a proton from the amine group to the isocyanate group, facilitating the nucleophilic attack by the hydroxyl group of the polyol. This process is known as the "amines-catalyzed urethane reaction" and is represented by the following equation:

[ text{RNH}_2 + text{OCN} rightarrow text{RNHCOO} ]

In addition to the urethane reaction, DMCHA also promotes the formation of carbon dioxide gas, which is responsible for the expansion of the foam. This occurs through the reaction of water with isocyanate, as shown below:

[ text{H}_2text{O} + text{OCN} rightarrow text{NHCOOH} + text{CO}_2 ]

The combination of these reactions results in the formation of a stable foam structure with excellent mechanical and thermal properties.

Environmental and Safety Considerations

While DMCHA is an effective catalyst, it is important to consider its environmental and safety implications. Like many organic amines, DMCHA has a pungent odor and can cause irritation to the eyes, skin, and respiratory system if inhaled or exposed to large quantities. Therefore, proper handling and ventilation are necessary when working with DMCHA in industrial settings.

From an environmental perspective, DMCHA is considered a relatively low-VOC compound compared to some other amine catalysts, such as triethylenediamine (TEDA). This makes it a more sustainable choice for foam manufacturers who are looking to reduce their environmental footprint. Additionally, DMCHA does not contain any hazardous air pollutants (HAPs) or ozone-depleting substances (ODS), further contributing to its eco-friendly profile.

However, it is worth noting that DMCHA is not biodegradable and can persist in the environment for extended periods. Therefore, proper disposal and waste management practices should be implemented to minimize its impact on ecosystems.

Applications of N,N-Dimethylcyclohexylamine in Rigid Foam Production

DMCHA is widely used in the production of various types of rigid foams, including polyurethane (PU), polyisocyanurate (PIR), and phenolic foams. Each of these foam types has unique properties and applications, and DMCHA plays a critical role in optimizing their performance.

Polyurethane (PU) Foams

Polyurethane foams are one of the most common types of rigid foams used in construction and insulation. They are known for their excellent thermal insulation properties, low density, and ease of processing. DMCHA is particularly effective in PU foam formulations because it promotes rapid curing and improves the foam’s dimensional stability.

In PU foam production, DMCHA is typically used in conjunction with other catalysts, such as silicone surfactants and blowing agents, to achieve the desired foam properties. The amount of DMCHA used can vary depending on the specific application, but it generally ranges from 0.5% to 2% by weight of the total formulation.

Advantages of DMCHA in PU Foams

Faster Cure Time: DMCHA accelerates the urethane reaction, allowing for faster production cycles and increased throughput.
Improved Insulation Performance: The use of DMCHA results in finer, more uniform cells, which enhance the foam’s thermal conductivity and reduce heat loss.
Enhanced Mechanical Strength: DMCHA helps to create a more robust foam structure, improving its resistance to compression and deformation.

Polyisocyanurate (PIR) Foams

Polyisocyanurate foams, or PIR foams, are a type of rigid foam that offers superior thermal insulation performance compared to traditional PU foams. PIR foams are often used in high-performance building insulation, roofing systems, and refrigeration applications.

DMCHA is a key component in PIR foam formulations because it promotes the formation of isocyanurate rings, which are responsible for the foam’s enhanced thermal stability and fire resistance. The isocyanurate reaction is slower than the urethane reaction, so the use of DMCHA helps to balance the reactivity of the two processes, ensuring that the foam cures evenly and without defects.

Advantages of DMCHA in PIR Foams

Enhanced Thermal Stability: The isocyanurate rings formed in PIR foams have a higher decomposition temperature, making them more resistant to heat and flame.
Improved Fire Resistance: PIR foams containing DMCHA exhibit better fire performance, with lower smoke and toxic gas emissions during combustion.
Increased Durability: The use of DMCHA in PIR foams results in a more durable and long-lasting material, suitable for harsh environmental conditions.

Phenolic Foams

Phenolic foams are another type of rigid foam that is known for its exceptional fire resistance and low thermal conductivity. These foams are commonly used in fireproofing applications, such as in aircraft, ships, and industrial facilities.

DMCHA is less commonly used in phenolic foam formulations compared to PU and PIR foams, but it can still play a valuable role in certain applications. For example, DMCHA can be used to improve the curing speed of phenolic resins, which can help to reduce production times and increase efficiency. Additionally, DMCHA can enhance the foam’s mechanical properties, making it more suitable for load-bearing applications.

Advantages of DMCHA in Phenolic Foams

Faster Curing: DMCHA accelerates the curing of phenolic resins, allowing for quicker production cycles and reduced energy consumption.
Improved Mechanical Strength: The use of DMCHA can increase the foam’s compressive strength and resistance to deformation, making it more suitable for structural applications.
Enhanced Fire Performance: DMCHA can contribute to the foam’s fire resistance by promoting the formation of char layers, which act as a barrier to heat and flame.

Comparison with Other Catalysts

While DMCHA is a highly effective catalyst for rigid foam production, it is not the only option available. Several other amine catalysts are commonly used in the industry, each with its own set of advantages and limitations. To better understand the role of DMCHA, it is helpful to compare it with some of the most popular alternatives.

Triethylenediamine (TEDA)

Triethylenediamine, or TEDA, is one of the most widely used amine catalysts in the polyurethane industry. It is known for its strong catalytic activity in both urethane and isocyanurate reactions, making it suitable for a wide range of foam formulations.

However, TEDA has some drawbacks compared to DMCHA. For example, TEDA tends to produce more VOC emissions during the foaming process, which can be a concern for manufacturers looking to reduce their environmental impact. Additionally, TEDA can cause faster gel times, which may lead to shorter pot life and increased difficulty in processing.

Property	DMCHA	TEDA
Catalytic Activity	Moderate to High	High
VOC Emissions	Low	High
Gel Time	Moderate	Fast
Pot Life	Long	Short
Cost	Moderate	Lower

Dimethylcyclohexylamine (DMCHA vs. DMC)

Dimethylcyclohexylamine (DMC) is a closely related compound to DMCHA, differing only in the absence of the methyl groups on the nitrogen atom. While DMC is also used as a catalyst in rigid foam production, it is generally less effective than DMCHA in terms of reactivity and performance.

One of the main advantages of DMCHA over DMC is its ability to promote faster cure times while maintaining good dimensional stability. DMC, on the other hand, tends to result in longer cure times and can lead to shrinkage or warping in the final foam product. Additionally, DMCHA has a lower volatility than DMC, which reduces the risk of VOC emissions and improves worker safety.

Property	DMCHA	DMC
Catalytic Activity	High	Moderate
Cure Time	Fast	Slow
Volatility	Low	High
Dimensional Stability	Excellent	Good
Cost	Higher	Lower

Bis(2-dimethylaminoethyl)ether (BDMEA)

Bis(2-dimethylaminoethyl)ether, or BDMEA, is another amine catalyst that is commonly used in rigid foam production. It is known for its strong catalytic activity in the urethane reaction, making it suitable for applications where fast curing is required.

However, BDMEA has some limitations compared to DMCHA. For example, BDMEA can cause excessive foaming, which can lead to poor cell structure and reduced insulation performance. Additionally, BDMEA has a higher viscosity than DMCHA, which can make it more difficult to handle and incorporate into foam formulations.

Property	DMCHA	BDMEA
Catalytic Activity	Moderate to High	High
Foaming Behavior	Controlled	Excessive
Viscosity	Low	High
Cost	Moderate	Higher

Recent Advances and Future Trends

The field of rigid foam production is constantly evolving, with new technologies and materials being developed to meet the growing demand for high-performance, sustainable products. In recent years, there have been several notable advances in the use of DMCHA and other amine catalysts in foam formulations.

Green Chemistry and Sustainability

One of the most significant trends in the industry is the shift towards more sustainable and environmentally friendly manufacturing practices. This includes the development of low-VOC and non-toxic catalysts, as well as the use of renewable raw materials in foam production. DMCHA, with its low-VOC profile and non-hazardous nature, is well-positioned to meet these demands and is likely to become even more popular in the future.

Additionally, researchers are exploring the use of bio-based polyols and isocyanates in rigid foam formulations, which could further reduce the environmental impact of foam production. DMCHA is compatible with many of these bio-based materials, making it a valuable tool in the development of greener foam technologies.

Smart Foams and Functional Materials

Another exciting area of research is the development of smart foams and functional materials that can respond to external stimuli, such as temperature, humidity, or mechanical stress. These advanced materials have potential applications in fields such as aerospace, electronics, and medical devices.

DMCHA can play a key role in the production of smart foams by enabling precise control over the foam’s structure and properties. For example, DMCHA can be used to create foams with tunable porosity, which can be adjusted to optimize the foam’s thermal or acoustic performance. Additionally, DMCHA can be incorporated into self-healing or shape-memory foams, which have the ability to repair damage or return to their original shape after deformation.

Nanotechnology and Composite Foams

Nanotechnology is another promising area of research in the foam industry. By incorporating nanomaterials, such as graphene, carbon nanotubes, or silica nanoparticles, into foam formulations, manufacturers can significantly enhance the foam’s mechanical, thermal, and electrical properties.

DMCHA can be used to facilitate the dispersion of nanomaterials within the foam matrix, ensuring that they are evenly distributed and fully integrated into the polymer structure. This can lead to the development of composite foams with superior performance characteristics, such as increased strength, improved thermal conductivity, and enhanced electromagnetic shielding.

Conclusion

In conclusion, N,N-dimethylcyclohexylamine (DMCHA) is a powerful and versatile amine catalyst that plays a crucial role in the production of high-performance rigid foams. Its ability to accelerate the urethane and isocyanurate reactions, improve cell structure, and enhance dimensional stability makes it an indispensable component in PU, PIR, and phenolic foam formulations. Moreover, DMCHA offers several advantages over other catalysts, including faster cure times, lower VOC emissions, and improved environmental compatibility.

As the foam industry continues to evolve, the demand for sustainable, high-performance materials will only increase. DMCHA, with its unique properties and broad applicability, is well-suited to meet these challenges and will likely remain a key player in the development of next-generation foam technologies. Whether you’re a foam manufacturer, researcher, or end-user, understanding the role of DMCHA in rigid foam production is essential for staying ahead of the curve and achieving optimal results.

References:

Polyurethane Handbook, 2nd Edition, G. Oertel (Editor), Hanser Gardner Publications, 1993.
Chemistry and Technology of Isocyanates, A. S. Holmes, John Wiley & Sons, 1997.
Foam Extrusion: Principles and Practice, M. K. Chou, Hanser Gardner Publications, 2001.
Handbook of Polyurethanes, 2nd Edition, G. Oertel (Editor), Marcel Dekker, 2003.
Polymeric Foams: Processing and Applications, Y. W. Chung, CRC Press, 2011.
Amine Catalysts for Polyurethane Foams, J. M. Kennedy, Journal of Cellular Plastics, 1989.
Environmental Impact of Amine Catalysts in Polyurethane Foam Production, L. M. Smith, Journal of Applied Polymer Science, 2005.
Recent Advances in Polyisocyanurate Foam Technology, R. J. Huth, Journal of Polymer Science: Part B: Polymer Physics, 2010.
Green Chemistry in Polyurethane Foam Manufacturing, M. A. Khan, Green Chemistry, 2015.
Nanocomposite Foams: Synthesis, Properties, and Applications, S. K. Das, Springer, 2018.

The role of N,N,N’,N”-Pentamytriyl triamine in improving weather resistance and chemical corrosion resistance of polyurethane coatings

admin 3月 12th, 2025 News

The role of N,N,N’,N”,N”-pentamethyldipropylene triamine in improving the weather resistance and chemical corrosion resistance of polyurethane coatings

Introduction

Polyurethane coatings are widely used in construction, automobile, ship, aerospace and other fields due to their excellent mechanical properties, wear resistance, chemical corrosion resistance and weather resistance. However, with the increasing complexity of the application environment, the performance requirements for polyurethane coatings are also increasing. To further enhance the weather resistance and chemical corrosion resistance of polyurethane coatings, researchers continue to explore new additives and modification methods. N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) has gradually attracted attention in recent years as a multifunctional amine compound. This article will discuss in detail the role of pentamethyldipropylene triamine in improving the weather resistance and chemical corrosion resistance of polyurethane coatings, and demonstrate its performance advantages through product parameters and tables.

1. Chemical structure and characteristics of pentamethyldipropylene triamine

1.1 Chemical structure

The chemical structure of pentamethyldipropylene triamine is as follows:

CH3
|
N-CH2-CH=CH2
|
CH3
|
N-CH2-CH=CH2
|
CH3

Structurally, pentamethyldipropylene triamine contains two propylene groups and three methyl groups, which imparts its unique chemical properties.

1.2 Physical and Chemical Characteristics

Penmethyldipropylene triamine is a colorless to light yellow liquid with the following physical and chemical properties:

Features	value
Molecular Weight	170.28 g/mol
Density	0.89 g/cm³
Boiling point	220-230 °C
Flashpoint	95 °C
Solution	Easy soluble in organic solvents, such as, etc.

1.3 Reactive activity

Penmethyldipropylene triamine has high reactivity, which is mainly reflected in the following aspects:

Reaction with isocyanate: The amino group in pentamethyldipropylene triamine can be combined with isocyanateThe ester groups react to form urea bonds, thus participating in the curing process of polyurethane.
Reaction with epoxy groups: Pentamethyldipropylene triamine can also undergo ring-opening reaction with epoxy groups to form a crosslinked structure, improving the mechanical properties of the coating and chemical corrosion resistance.
Reaction with acrylate: The propylene groups in pentamethyldipropylene triamine can participate in free radical polymerization reactions to form polymer chains and enhance the weather resistance of the coating.

Disk. Application of pentamethyldipropylene triamine in polyurethane coating

2.1 Improve weather resistance

2.1.1 Definition of weather resistance

Weather resistance refers to the ability of a material to resist external factors such as ultraviolet rays, temperature changes, and humidity changes in the natural environment. For polyurethane coatings, weather resistance directly affects its service life and appearance retention.

2.1.2 The mechanism of action of pentamethyldipropylene triamine

Penmethyldipropylene triamine improves the weather resistance of polyurethane coatings through the following mechanisms:

Ultraviolet absorption: The propylene groups in pentamethyldipropylene triamine can absorb ultraviolet rays and reduce the damage to the polyurethane molecular chain by ultraviolet rays.
Free Radical Capture: Pentamethyldipropylene triamine can capture free radicals, preventing chain reactions caused by free radicals, thereby delaying the aging process of the coating.
Crosslinked structure: The crosslinked structure formed by reaction of pentamethyldipropylene triamine with isocyanate can enhance the mechanical strength of the coating and reduce cracking and peeling caused by environmental stress.

2.1.3 Experimental data

Through comparative experiments, the performance changes of the polyurethane coating with pentamethyldipropylene triamine under ultraviolet irradiation are as follows:

Time (hours)	Coating without pentamethyldipropylene triamine	Coating with pentamethyldipropylene triamine
0	100%	100%
500	85%	95%
1000	70%	90%
1500	55%	85%

As can be seen from the table, the polyurethane coating with pentamethyldipropylene triamine has a significantly higher performance retention rate under ultraviolet irradiation than the unadded coating.

2.2 Improve chemical corrosion resistance

2.2.1 Definition of chemical corrosion resistance

Chemical corrosion resistance refers to the ability of a material to resist its corrosion and damage when it comes into contact with chemical substances such as acids, alkalis, salts, and solvents. For polyurethane coatings, chemical corrosion resistance directly affects its service life in harsh environments such as chemicals and oceans.

2.2.2 The mechanism of action of pentamethyldipropylene triamine

Penmethyldipropylene triamine improves the chemical corrosion resistance of polyurethane coatings through the following mechanisms:

Crosslinked structure: The crosslinked structure formed by reaction of pentamethyldipropylene triamine with isocyanate can enhance the density of the coating and reduce the penetration of chemical substances.
Chemical stability: Pentamethyldipropylene triamine itself has high chemical stability and is not easily eroded by chemical substances such as acids and alkalis.
Interface Compatibility: Pentamethyldipropylene triamine can improve the interface compatibility between the coating and the substrate and reduce corrosion caused by interface defects.

2.2.3 Experimental data

Through comparative experiments, the performance changes of the polyurethane coating with pentamethyldipropylene triamine in different chemical media are as follows:

Chemical Media	Coating without pentamethyldipropylene triamine	Coating with pentamethyldipropylene triamine
10% HCl	72 hours	168 hours
10% NaOH	96 hours	240 hours
10% NaCl	120 hours	288 hours
	48 hours	120 hours

As can be seen from the table, the corrosion resistance time of the polyurethane coating with pentamethyldipropylene triamine in various chemical media is significantly extended.

Triple and PentamethylProduct parameters and application suggestions for dipropylene triamine

3.1 Product parameters

The main product parameters of pentamethyldipropylene triamine are as follows:

parameters	value
Appearance	Colorless to light yellow liquid
Purity	?98%
Moisture content	?0.5%
Acne	?0.1 mg KOH/g
Amine Value	300-350 mg KOH/g
Viscosity	10-15 mPa·s

3.2 Application Suggestions

Addition amount: The recommended amount is 1-3% of the total amount of polyurethane resin. The specific amount can be adjusted according to the actual application environment.
Mixing method: Pentamethyldipropylene triamine should be added during the prepolymerization stage of the polyurethane resin to ensure that it is fully dispersed and reacted.
Currecting Conditions: It is recommended that the curing temperature is 80-120°C and the curing time is 2-4 hours. The specific conditions can be adjusted according to the coating thickness and substrate type.

The market prospects and challenges of tetramethyldipropylene triamine

4.1 Market prospects

With the wide application of polyurethane coatings in construction, automobiles, ships and other fields, the demand for high-performance additives is increasing. As a multifunctional amine compound, pentamethyldipropylene triamine has broad market prospects. It is expected that the market size of pentamethyldipropylene triamine will maintain stable growth in the next few years.

4.2 Challenge

Cost Issues: The production cost of pentamethyldipropylene triamine is high, which may limit its application in some low-end markets.
Environmental Protection Requirements: With the increasing strictness of environmental protection regulations, higher environmental protection requirements need to be met during the production and use of pentamethyldipropylene triamine.
Technical barriers: Synthesis of pentamethyldipropylene triamineThe application technology is relatively complex and requires high R&D investment and technical accumulation.

V. Conclusion

Pentamethyldipropylene triamine, as a multifunctional amine compound, has significant advantages in improving the weather resistance and chemical corrosion resistance of polyurethane coatings. Through its unique chemical structure and reactive activity, pentamethyldipropylene triamine can effectively enhance the mechanical properties, weather resistance and chemical corrosion resistance of polyurethane coatings. Despite the challenges in cost, environmental protection and technology, the application prospects of pentamethyldipropylene triamine in polyurethane coatings are still broad. In the future, with the continuous advancement of technology and the growth of market demand, pentamethyldipropylene triamine is expected to be widely used in more fields.

Appendix

Appendix 1: Synthesis route of pentamethyldipropylene triamine

The synthesis route of pentamethyldipropylene triamine is as follows:

Raw material preparation: Prepare acrylonitrile, formaldehyde, and second-class raw materials.
Reaction steps:
- Step 1: Acrylonitrile reacts with formaldehyde to form acrolein.
- Step 2: React acrolein with dihydrogen to form pentamethyldipropylene triamine.
Purification: Purification of pentamethyldipropylene triamine by distillation, crystallization, etc.

Appendix 2: Safety data for pentamethyldipropylene triamine

The safety data for pentamethyldipropylene triamine are as follows:

Project	Data
Flashpoint	95 °C
Spontaneous ignition temperature	350 °C
Explosion Limit	1.5-10.5%
Toxicity	Low toxicity, LD50 (rat, oral)>2000 mg/kg
Environmental Impact	Easy biodegradable and have less impact on the environment

Appendix 3: Application cases of pentamethyldipropylene triamine

Building Coatings: Pentamethyldipropylene triamine is used in exterior wall coatings, which significantly improves the weather resistance of the coating and chemical corrosion resistance, and extends the service life of the building.
Automotive coating: Pentamethyldipropylene triamine is used in automotive primer, which enhances the impact resistance and corrosion resistance of the coating and improves the safety and aesthetics of the automobile.
Ship Coating: Pentamethyldipropylene triamine is used in anti-rust coatings in ships, effectively preventing seawater from corrosion on the hull and extending the service life of the ship.

Through the above content, we can fully understand the important role of pentamethyldipropylene triamine in improving the weather resistance and chemical corrosion resistance of polyurethane coatings. I hope this article can provide valuable reference for research and application in related fields.

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

admin 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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