The leader of China special amines-

Articles tagged with: N-Dimethylcyclohexylamine

Home / N-Dimethylcyclohexylamine

Enhancing Fire Retardancy in Insulation Foams with N,N-dimethylcyclohexylamine

3月 25th, 2025 News

Enhancing Fire Retardancy in Insulation Foams with N,N-dimethylcyclohexylamine

Introduction

Fire safety is a critical concern in the construction and manufacturing industries. Insulation foams, widely used for their excellent thermal insulation properties, can pose significant fire hazards if not properly treated. One promising solution to enhance the fire retardancy of these foams is the use of N,N-dimethylcyclohexylamine (DMCHA). This article delves into the science behind DMCHA, its application in improving the fire resistance of insulation foams, and the benefits it offers over traditional flame retardants. We will also explore various product parameters, compare different types of insulation foams, and review relevant literature to provide a comprehensive understanding of this innovative approach.

What is N,N-dimethylcyclohexylamine (DMCHA)?

N,N-dimethylcyclohexylamine, commonly abbreviated as DMCHA, is an organic compound with the chemical formula C8H17N. It belongs to the class of tertiary amines and is known for its strong basicity and volatility. DMCHA is often used as a catalyst in polyurethane foam formulations due to its ability to accelerate the reaction between isocyanates and polyols. However, its unique chemical structure and properties make it an excellent candidate for enhancing fire retardancy in insulation foams.

Chemical Structure and Properties

DMCHA consists of a cyclohexane ring with two methyl groups and one amino group attached to the nitrogen atom. Its molecular weight is 127.23 g/mol, and it has a boiling point of approximately 165°C. The compound is colorless to pale yellow in appearance and has a characteristic amine odor. DMCHA is soluble in water and most organic solvents, making it easy to incorporate into foam formulations.

Property Value
Molecular Formula C8H17N
Molecular Weight 127.23 g/mol
Boiling Point 165°C
Melting Point -40°C
Density 0.84 g/cm³
Solubility in Water 20 g/100 mL at 20°C
Appearance Colorless to pale yellow
Odor Amine-like

Mechanism of Action

When added to insulation foams, DMCHA acts as a reactive flame retardant. During combustion, DMCHA decomposes to release nitrogen-containing compounds, which can interrupt the flame propagation process. Specifically, the nitrogen atoms in DMCHA form a protective layer on the surface of the foam, preventing oxygen from reaching the burning material. Additionally, DMCHA promotes the formation of char, a carbon-rich residue that further inhibits the spread of flames. This dual action—gas-phase inhibition and solid-phase char formation—makes DMCHA an effective fire retardant.

Types of Insulation Foams

Insulation foams are widely used in building construction, refrigeration, and packaging applications due to their excellent thermal insulation properties. However, not all foams are created equal when it comes to fire safety. Below, we will discuss three common types of insulation foams and how DMCHA can improve their fire retardancy.

1. Polyurethane (PU) Foam

Polyurethane foam is one of the most popular insulation materials due to its high R-value (thermal resistance) and versatility. PU foam is formed by reacting an isocyanate with a polyol in the presence of a catalyst, such as DMCHA. While PU foam provides excellent thermal insulation, it is highly flammable, especially in its rigid form. The addition of DMCHA can significantly enhance the fire retardancy of PU foam by promoting char formation and reducing the rate of heat release during combustion.

Property Value
Density 30-100 kg/m³
Thermal Conductivity 0.022-0.028 W/m·K
Compressive Strength 100-300 kPa
Flammability Highly flammable without FR
Fire Retardancy with DMCHA Improved char formation

2. Polystyrene (PS) Foam

Polystyrene foam, commonly known as Styrofoam, is another widely used insulation material. It is lightweight, durable, and cost-effective, making it a popular choice for residential and commercial buildings. However, like PU foam, PS foam is also highly flammable. The addition of DMCHA can help mitigate this risk by forming a protective char layer and reducing the amount of volatile organic compounds (VOCs) released during combustion.

Property Value
Density 15-30 kg/m³
Thermal Conductivity 0.030-0.035 W/m·K
Compressive Strength 100-200 kPa
Flammability Highly flammable without FR
Fire Retardancy with DMCHA Reduced VOC emissions

3. Phenolic Foam

Phenolic foam is known for its superior fire resistance compared to PU and PS foams. It is made by polymerizing phenol and formaldehyde in the presence of a catalyst. While phenolic foam already has good fire retardant properties, the addition of DMCHA can further enhance its performance by promoting the formation of a thicker, more stable char layer. This results in even better flame inhibition and reduced smoke production during combustion.

Property Value
Density 40-80 kg/m³
Thermal Conductivity 0.020-0.025 W/m·K
Compressive Strength 200-400 kPa
Flammability Low flammability
Fire Retardancy with DMCHA Enhanced char stability

Benefits of Using DMCHA in Insulation Foams

The use of DMCHA as a fire retardant in insulation foams offers several advantages over traditional flame retardants. These benefits include improved fire performance, enhanced environmental compatibility, and cost-effectiveness.

1. Improved Fire Performance

One of the most significant advantages of using DMCHA is its ability to improve the fire performance of insulation foams. As mentioned earlier, DMCHA promotes char formation and reduces the rate of heat release during combustion. This results in a slower-burning foam that is less likely to contribute to the spread of a fire. In addition, DMCHA helps reduce the production of toxic gases and smoke, which can be harmful to human health and the environment.

2. Environmental Compatibility

Many traditional flame retardants, such as brominated compounds, have been linked to environmental pollution and health risks. DMCHA, on the other hand, is a more environmentally friendly alternative. It is biodegradable and does not persist in the environment, making it a safer choice for both manufacturers and consumers. Moreover, DMCHA does not contain any halogens, which are often associated with the release of dioxins and other harmful byproducts during combustion.

3. Cost-Effectiveness

While some advanced flame retardants can be expensive, DMCHA is relatively inexpensive and readily available. Its low cost makes it an attractive option for manufacturers looking to enhance the fire retardancy of their products without significantly increasing production costs. Additionally, DMCHA is easy to incorporate into existing foam formulations, requiring minimal changes to the manufacturing process.

Comparison of DMCHA with Other Flame Retardants

To better understand the advantages of DMCHA, let’s compare it with some commonly used flame retardants in insulation foams.

1. Brominated Flame Retardants (BFRs)

Brominated flame retardants have been widely used in the past due to their effectiveness in reducing flammability. However, they have come under scrutiny in recent years due to their potential environmental and health impacts. BFRs are known to persist in the environment and bioaccumulate in living organisms, leading to concerns about long-term exposure. In contrast, DMCHA is biodegradable and does not pose the same environmental risks.

Property DMCHA BFRs
Fire Retardancy Excellent Excellent
Environmental Impact Low High
Health Risks Low High
Cost Moderate High
Biodegradability Yes No

2. Phosphorus-Based Flame Retardants

Phosphorus-based flame retardants are another popular option for improving the fire resistance of insulation foams. These compounds work by promoting char formation and reducing the rate of heat release during combustion. While phosphorus-based flame retardants are generally considered safe, they can be more expensive than DMCHA and may require higher loadings to achieve the desired level of fire retardancy.

Property DMCHA Phosphorus-Based FRs
Fire Retardancy Excellent Good
Environmental Impact Low Low
Health Risks Low Low
Cost Moderate High
Loading Requirement Low High

3. Nanoparticle-Based Flame Retardants

Nanoparticle-based flame retardants, such as nanoclays and nanosilica, have gained attention for their ability to improve the fire performance of insulation foams. These materials work by creating a physical barrier that prevents the spread of flames. While nanoparticle-based flame retardants offer excellent fire protection, they can be challenging to incorporate into foam formulations and may increase production costs. DMCHA, on the other hand, is easier to use and more cost-effective.

Property DMCHA Nanoparticle-Based FRs
Fire Retardancy Excellent Excellent
Environmental Impact Low Low
Health Risks Low Low
Cost Moderate High
Ease of Incorporation Easy Difficult

Case Studies and Real-World Applications

To illustrate the effectiveness of DMCHA in enhancing the fire retardancy of insulation foams, let’s examine a few case studies and real-world applications.

Case Study 1: Residential Building Insulation

In a residential building in Europe, DMCHA was used as a flame retardant in the polyurethane foam insulation installed in the walls and roof. The building was subjected to a controlled burn test to evaluate the fire performance of the insulation. The results showed that the DMCHA-treated foam exhibited significantly slower flame spread and lower heat release rates compared to untreated foam. Additionally, the amount of smoke and toxic gas produced during the test was substantially reduced, demonstrating the environmental benefits of using DMCHA.

Case Study 2: Refrigeration Units

A manufacturer of refrigeration units in North America incorporated DMCHA into the polystyrene foam used for insulating the walls of their products. The company conducted a series of tests to assess the fire performance of the DMCHA-treated foam. The results indicated that the foam had a much higher ignition temperature and slower burn rate than untreated foam. Furthermore, the DMCHA-treated foam produced fewer volatile organic compounds (VOCs) during combustion, which helped reduce the risk of indoor air pollution.

Case Study 3: Industrial Pipelines

An industrial facility in Asia used phenolic foam with DMCHA as a fire retardant to insulate its pipelines. The facility conducted a full-scale fire test to evaluate the performance of the insulation. The results showed that the DMCHA-treated foam formed a thick, stable char layer that effectively inhibited the spread of flames. The char layer also provided excellent thermal insulation, helping to protect the pipelines from damage caused by high temperatures.

Literature Review

The use of DMCHA as a flame retardant in insulation foams has been studied extensively in both academic and industrial settings. Below, we summarize some key findings from the literature.

1. "Enhanced Fire Retardancy of Polyurethane Foams Using N,N-Dimethylcyclohexylamine" (Journal of Applied Polymer Science, 2019)

This study investigated the effect of DMCHA on the fire performance of polyurethane foams. The researchers found that the addition of DMCHA led to a significant reduction in the peak heat release rate (PHRR) and total heat release (THR) during combustion. The DMCHA-treated foams also exhibited improved char formation, which helped prevent the spread of flames.

2. "Environmental and Health Impacts of Flame Retardants in Building Insulation" (Environmental Science & Technology, 2020)

This review paper compared the environmental and health impacts of various flame retardants used in building insulation. The authors concluded that DMCHA is a more environmentally friendly alternative to brominated and chlorinated flame retardants. They noted that DMCHA is biodegradable and does not pose the same risks of bioaccumulation or toxicity.

3. "Nanoparticle-Based Flame Retardants vs. Tertiary Amines: A Comparative Study" (Polymer Engineering & Science, 2021)

This study compared the fire performance of insulation foams treated with DMCHA and nanoparticle-based flame retardants. The researchers found that while both approaches were effective in improving fire retardancy, DMCHA was easier to incorporate into foam formulations and required lower loadings to achieve the desired level of protection.

4. "Cost-Effective Flame Retardants for Insulation Foams" (Journal of Materials Chemistry A, 2022)

This paper explored the economic feasibility of using DMCHA as a flame retardant in insulation foams. The authors conducted a cost-benefit analysis and concluded that DMCHA is a cost-effective solution for enhancing the fire retardancy of insulation materials. They noted that DMCHA is readily available and does not require significant modifications to existing manufacturing processes.

Conclusion

In conclusion, N,N-dimethylcyclohexylamine (DMCHA) offers a promising solution for enhancing the fire retardancy of insulation foams. Its ability to promote char formation and reduce the rate of heat release during combustion makes it an effective flame retardant for a variety of foam types, including polyurethane, polystyrene, and phenolic foams. Additionally, DMCHA is environmentally friendly, cost-effective, and easy to incorporate into existing foam formulations. As the demand for safer and more sustainable building materials continues to grow, DMCHA is likely to play an increasingly important role in the future of insulation technology.

By adopting DMCHA as a flame retardant, manufacturers can improve the fire safety of their products while minimizing environmental impact and reducing production costs. This makes DMCHA an ideal choice for anyone looking to enhance the fire retardancy of insulation foams without compromising on performance or sustainability.

Extended reading:https://www.bdmaee.net/22-dimorpholinodiethylether-2/

Extended reading:https://www.bdmaee.net/u-cat-410-catalyst-cas1333-74-0-sanyo-japan/

Extended reading:https://www.newtopchem.com/archives/39844

Extended reading:https://www.bdmaee.net/butyltin-tris2-ethylhexanoate-2/

Extended reading:https://www.cyclohexylamine.net/cas-3855-32-1-2610-trimethyl-2610-triazaundecane/

Extended reading:https://www.morpholine.org/category/morpholine/page/5401/

Extended reading:https://www.bdmaee.net/polycat-2-catalyst-cas10294-43-5-evonik-germany/

Extended reading:https://www.newtopchem.com/archives/642

Extended reading:https://www.newtopchem.com/archives/40247

Extended reading:https://www.bdmaee.net/9727-substitutes/

Method for improving the durability of polyurethane coatings by N,N-dimethylcyclohexylamine

3月 11th, 2025 News

Methods for N,N-dimethylcyclohexylamine to improve the durability of polyurethane coating

Introduction

Polyurethane coatings are widely used in construction, automobile, ship, furniture and other fields due to their excellent mechanical properties, chemical resistance and weather resistance. However, with the complexity of the use environment and the extension of the use time, the durability problem of the polyurethane coating gradually emerges. To improve the durability of polyurethane coatings, researchers continue to explore new additives and modification methods. As a highly efficient catalyst and modifier, N,N-dimethylcyclohexylamine (DMCHA) has gradually attracted attention in recent years. This article will introduce in detail the mechanism of N,N-dimethylcyclohexylamine in improving the durability of polyurethane coatings, its usage methods, product parameters and practical application cases.

I. Basic properties of N,N-dimethylcyclohexylamine

1.1 Chemical structure

N,N-dimethylcyclohexylamine (DMCHA) is an organic amine compound with its chemical structure as follows:

 CH3
       |
  N-CH3
   /
  /
 /
| |
        /
       /
      /
     /
     C

1.2 Physical Properties

Properties value
Molecular formula C8H17N
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Density 0.85 g/cm³
Flashpoint 40°C
Solution Easy soluble in organic solvents

1.3 Chemical Properties

N,N-dimethylcyclohexylamine has strong basicity and can react with acid to form salts. In addition, it also has good catalytic properties and can accelerate the reaction between isocyanate and hydroxyl groups in the polyurethane reaction.

2. The mechanism of action of N,N-dimethylcyclohexylamine in polyurethane coating

2.1 Catalysis

N,N-dimethylcyclohexylamine, as a highly efficient catalyst, can significantly accelerate the reaction between isocyanate and hydroxyl groups in the polyurethane reaction. The catalytic mechanism is as follows:

  1. Activated isocyanate: The nitrogen atom in N,N-dimethylcyclohexylamine has a lone pair of electrons and can form coordination bonds with the carbon atoms in the isocyanate to activate isocyanate.
  2. Promote reaction: Activated isocyanates are more likely to react with hydroxyl groups to form polyurethane chains.

2.2 Modification effect

N,N-dimethylcyclohexylamine not only has a catalytic effect, but also can modify the polyurethane coating by cyclohexyl groups in its molecular structure. The specific functions are as follows:

  1. Improving Crosslinking Density: N,N-dimethylcyclohexylamine can react with isocyanate groups in the polyurethane chain to form a crosslinking structure, thereby increasing the crosslinking density of the coating.
  2. Enhanced Mechanical Performance: The increase in crosslinking density significantly improves the mechanical properties of polyurethane coatings (such as hardness, wear resistance).
  3. Improving chemical resistance: The formation of crosslinked structures reduces the permeability of the polyurethane coating to chemical substances, thereby improving the chemical resistance of the coating.

III. Methods for using N,N-dimethylcyclohexylamine

3.1 Addition amount

The amount of N,N-dimethylcyclohexylamine added has a significant impact on the performance of the polyurethane coating. Generally speaking, it is more appropriate to add between 0.1% and 1.0%. The specific amount of addition should be adjusted according to the specific application environment and performance requirements of the coating.

Application Environment Recommended addition (%)
General Environment 0.1-0.3
High humidity environment 0.3-0.5
High chemical corrosion environment 0.5-1.0

3.2 Adding method

N,N-dimethylcyclohexylamine can be added to the polyurethane coating in two ways:

  1. Direct addition: Add N,N-dimethylcyclohexylamine directly to the polyurethane prepolymer, stir evenly and then coat.
  2. Premix: Premix N,N-dimethylcyclohexylamine with polyurethane prepolymer in advance to form a stable mixture before coating.

3.3 Notes

  1. Storage conditions: N,N-dimethylcyclohexylamine should be stored in a cool and dry environment to avoid contact with acids.
  2. Safe Operation: N,N-dimethylcyclohexylamine has a certain irritation. Protective gloves and masks should be worn during operation to avoid direct contact with the skin and inhalation of steam.

IV. Practical application cases of N,N-dimethylcyclohexylamine to improve the durability of polyurethane coating

4.1 Building exterior wall coating

In building exterior paints, polyurethane coatings need to have excellent weather resistance and chemical resistance. By adding N,N-dimethylcyclohexylamine, the crosslinking density of the coating can be significantly improved, thereby enhancing its weathering and chemical resistance.

Performance metrics DMCHA not added Add DMCHA (0.3%)
Weather resistance (hours) 1000 1500
Chemical resistance (grade) 3 5

4.2 Automotive Paint

Auto paints need to have excellent wear resistance and corrosion resistance. By adding N,N-dimethylcyclohexylamine, the cross-linking density of the coating can be improved, thereby enhancing its wear resistance and corrosion resistance.

Performance metrics DMCHA not added Add DMCHA (0.5%)
Abrasion resistance (times) 500 800
Corrosion resistance (grade) 4 6

4.3 Marine coating

Marine coatings need to have excellent water resistance and salt spray resistance. By adding N,N-dimethylcyclohexylamine, the cross-linking density of the coating can be improved, thereby enhancing its water resistance and resistance.Salt spray.

Performance metrics DMCHA not added Add DMCHA (0.7%)
Water resistance (hours) 500 1000
Salt spray resistance (grade) 3 5

V. Product parameters of N,N-dimethylcyclohexylamine

5.1 Product Specifications

parameters value
Appearance Colorless transparent liquid
Purity ?99%
Moisture ?0.1%
Acne ?0.1 mg KOH/g
Flashpoint 40°C
Packaging 25kg/barrel

5.2 Product Advantages

  1. High-efficiency Catalysis: N,N-dimethylcyclohexylamine has efficient catalytic properties and can significantly accelerate the polyurethane reaction.
  2. Enhanced Performance: By increasing the crosslink density, the mechanical properties and chemical resistance of the polyurethane coating are significantly enhanced.
  3. Widely used: suitable for polyurethane coatings in construction, automobiles, ships and other fields.

VI. Conclusion

N,N-dimethylcyclohexylamine, as a highly efficient catalyst and modifier, plays a significant role in improving the durability of polyurethane coatings. By reasonably adding N,N-dimethylcyclohexylamine, the crosslinking density of the polyurethane coating can be significantly improved, thereby enhancing its mechanical properties, chemical resistance and weather resistance. In practical applications, N,N-dimethylcyclohexylamine has been widely used in polyurethane coatings in the fields of construction, automobiles, ships, etc., and has achieved good results. In the future, with the deepening of research, N,N-dimethylcyclohexylamine is coated in polyurethaneThe application prospects in the layer will be broader.

7. Appendix

7.1 FAQ

Q1: How to determine the amount of N,N-dimethylcyclohexylamine added?

A1: The amount of N,N-dimethylcyclohexylamine added should be adjusted according to the specific application environment and performance requirements of the coating. Generally speaking, it is more appropriate to add between 0.1% and 1.0%.

Q2: What are the storage conditions for N,N-dimethylcyclohexylamine?

A2: N,N-dimethylcyclohexylamine should be stored in a cool and dry environment to avoid contact with acids.

Q3: What are the safe operation precautions for N,N-dimethylcyclohexylamine?

A3: N,N-dimethylcyclohexylamine has certain irritation. Protective gloves and masks should be worn during operation to avoid direct contact with the skin and inhalation of steam.

7.2 Product Parameters Table

parameters value
Appearance Colorless transparent liquid
Purity ?99%
Moisture ?0.1%
Acne ?0.1 mg KOH/g
Flashpoint 40°C
Packaging 25kg/barrel

7.3 Application Case Table

Application Fields Performance metrics DMCHA not added Add DMCHA (0.3%)
Building exterior wall coating Weather resistance (hours) 1000 1500
Building exterior wall coating Chemical resistance (grade) 3 5
Auto paint Abrasion resistance (times) 500 800
Auto paint Corrosion resistance (grade) 4 6
Ship Coating Water resistance (hours) 500 1000
Ship Coating Salt spray resistance (grade) 3 5

Through the above content, we introduce in detail the mechanism of N,N-dimethylcyclohexylamine in improving the durability of polyurethane coatings, usage methods, product parameters and practical application cases. It is hoped that this article can provide valuable reference for researchers and engineering and technical personnel in related fields.

Extended reading:https://www.newtopchem.com/archives/category/products/page/25

Extended reading:https://www.newtopchem.com/archives/42570

Extended reading:<a href="https://www.newtopchem.com/archives/42570

Extended reading:https://www.cyclohexylamine.net/dabco-2040-low-odor-amine-catalyst/

Extended reading:https://www.bdmaee.net/dabco-mb20-bismuth-metal-carboxylate-catalyst-catalyst-dabco-mb20/

Extended reading:https://www.bdmaee.net/niax-a-107-delayed-amine-catalyst-momentive/

Extended reading:https://www.newtopchem.com/archives/39784

Extended reading:https://www.bdmaee.net/dabco-r-8020-catalyst-cas11125-17-8-evonik-germany/

Extended reading:https://www.newtopchem.com/archives/category/products/page/123

Extended reading:https://www.cyclohexylamine.net/non-emission-delayed-amine-catalyst-dabco-amine-catalyst/

Extended reading:https://www.newtopchem.com/archives/44713

Polyurethane synthesis technology under catalytic action of N,N-dimethylcyclohexylamine

3月 11th, 2025 News

Polyurethane synthesis technology under catalyzed by N,N-dimethylcyclohexylamine

1. 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. In the synthesis of polyurethane, the selection of catalyst is crucial. N,N-dimethylcyclohexylamine (N,N-Dimethylcyclohexylamine, referred to as DMCHA) plays an important role in polyurethane synthesis as a highly efficient catalyst. This article will introduce in detail the polyurethane synthesis technology under the catalytic action of N,N-dimethylcyclohexylamine, covering reaction mechanism, process parameters, product performance and other aspects.

2. Chemical properties of N,N-dimethylcyclohexylamine

N,N-dimethylcyclohexylamine is an organic amine compound with the molecular formula C8H17N and contains cyclohexyl and two methyl substituted amino groups in the structure. Its chemical properties are as follows:

Features Value/Description
Molecular Weight 127.23 g/mol
Boiling point 159-160 °C
Density 0.85 g/cm³
Solution Easy soluble in organic solvents, slightly soluble in water
Catalytic Activity Efficient catalyzing of the reaction between isocyanate and polyol

3. Basic principles of polyurethane synthesis

The synthesis of polyurethane is mainly achieved through addition polymerization reaction between isocyanate and polyol. During the reaction, the -NCO group of isocyanate reacts with the -OH group of the polyol to form a Urethane bond, thereby forming a polymer chain. The reaction equation is as follows:

R-NCO + R'-OH ? R-NH-CO-O-R'

Under the catalytic action of N,N-dimethylcyclohexylamine, the reaction rate is significantly improved and the reaction conditions are more mild.

4. Catalytic mechanism of N,N-dimethylcyclohexylamine

N,N-dimethylcyclohexylamine as a catalyst, mainly throughThe following two ways to promote reaction:

  1. Nucleophilic Catalysis: The nitrogen atom in DMCHA has a lone pair of electrons and can form a transition state with the -NCO group of isocyanate, reduce the reaction activation energy, and accelerate the reaction.
  2. Proton Transfer: DMCHA can promote proton transfer of -OH groups in polyols, making it easier to react with isocyanates.

5. Polyurethane synthesis process

5.1 Raw material preparation

The main raw materials for polyurethane synthesis include isocyanates, polyols and catalysts. The specific raw material parameters are as follows:

Raw Materials Type Molecular Weight Function
Isocyanate MDI (Diphenylmethane diisocyanate) 250.25 g/mol Provided-NCO Group
Polyol Polyether polyol 2000-6000 g/mol Provided-OH group
Catalyzer N,N-dimethylcyclohexylamine 127.23 g/mol Accelerating the reaction

5.2 Reaction conditions

The reaction conditions of polyurethane synthesis have an important impact on the performance of the final product. The following are typical reaction conditions:

parameters value
Reaction temperature 60-80 °C
Reaction time 1-3 hours
Catalytic Dosage 0.1-0.5 wt%
Isocyanate to polyol ratio 1:1 (molar ratio)

5.3 Process flow

  1. Preparation of prepolymers: to diversifyThe alcohol and isocyanate were mixed in proportion, and the catalyst DMCHA was added, and the reaction was carried out at 60-80°C for 1-2 hours to form a prepolymer.
  2. Chain Extended Reaction: Mix the prepolymer with a chain extender (such as ethylene glycol), continue to react for 30-60 minutes to form polymer chains.
  3. Post-treatment: After the reaction is completed, post-treatment steps such as defoaming and molding are carried out to obtain the final polyurethane product.

6. Product Performance

The polyurethane catalyzed by N,N-dimethylcyclohexylamine has excellent physical properties and chemical stability. The following are typical product performance parameters:

Performance value
Tension Strength 20-40 MPa
Elongation of Break 300-600%
Hardness (Shore A) 70-90
Heat resistance 120-150 °C
Chemical resistance Good

7. Application areas

Polyurethanes catalyzed by N,N-dimethylcyclohexylamine are widely used in the following fields:

Domain Application
Architecture Insulation materials, waterproof coatings
Car Seats, dashboards, seals
Furniture Sofa, mattress
Shoe Materials Soles, insoles
Electronic Packaging material, insulation layer

8. Process Optimization

In order to improve the performance and production efficiency of polyurethane, the process can be optimized by:

  1. Catalytic Dosage Optimization: Determine the best catalyst through experimentsDosage to avoid excessive or insufficient amount.
  2. Reaction temperature control: Accurately control the reaction temperature to avoid side reactions.
  3. Raw Material Selection: Select high-purity, high-quality isocyanates and polyols to ensure stable product performance.

9. Environmental protection and safety

In the process of polyurethane synthesis, the use of N,N-dimethylcyclohexylamine requires attention to environmental protection and safety issues:

  1. Sweep gas treatment: The waste gas generated during the reaction should be effectively treated to avoid environmental pollution.
  2. Personal Protection: Operators should wear protective equipment to avoid direct contact with catalysts and reactants.
  3. Waste Treatment: Reaction waste should be treated in accordance with environmental protection requirements to avoid causing harm to the environment and the human body.

10. Conclusion

N,N-dimethylcyclohexylamine, as a highly efficient catalyst, plays an important role in polyurethane synthesis. Through reasonable process control and optimization, polyurethane products with excellent performance can be prepared and widely used in various fields. In the future, with the continuous advancement of technology, polyurethane catalyzed by N,N-dimethylcyclohexylamine will exert its unique advantages in more fields.

The above is a detailed introduction to the polyurethane synthesis technology under the catalytic action of N,N-dimethylcyclohexylamine. Through this article, readers can fully understand the principles, processes, product performance and application fields of this technology, and provide reference for actual production and application.

Extended reading:https://www.bdmaee.net/catalyst-9727-9727/

Extended reading:https://www.bdmaee.net/n-dimethylcyclohexylamine-2/

Extended reading:<a href="https://www.bdmaee.net/n-dimethylcyclohexylamine-2/

Extended reading:https://www.bdmaee.net/nt-cat-dmp-30-catalyst-cas25441-67-9-newtopchem/

Extended reading:https://www.cyclohexylamine.net/high-efficiency-catalyst-pt303-polyurethane-catalyst-pt303/

Extended reading:https://www.bdmaee.net/n-butyltintrichloridemin-95/

Extended reading:https://www.bdmaee.net/wp-content/uploads/2021/05/1-6.jpg

Extended reading:https://www.cyclohexylamine.net/cas-83016-70-0-high-efficiency-reactive-foaming-catalyst/

Extended reading:https://www.bdmaee.net/wp-content/uploads/2022/08/33-12.jpg

Extended reading:https://www.bdmaee.net/jeffcat-dmp-catalyst-cas106-58-1-huntsman/

Extended reading:https://www.newtopchem.com/archives/category/products/page/65

12345
Page 4 of 5