Analysis of the application and advantages of DMCHA (N,N-dimethylcyclohexylamine) in environmentally friendly polyurethane foam

Analysis of the application and advantages of DMCHA (N,N-dimethylcyclohexylamine) in environmentally friendly polyurethane foam

Catalog

  1. Introduction
  2. The basic properties of DMCHA
  3. Overview of environmentally friendly polyurethane foam
  4. The application of DMCHA in environmentally friendly polyurethane foam
  5. Analysis of the advantages of DMCHA in environmentally friendly polyurethane foam
  6. Product parameters and performance comparison
  7. Conclusion

1. Introduction

With the increasing global environmental awareness, environmentally friendly materials are being used in various fields more and more widely. As an important polymer material, polyurethane foam is widely used in furniture, construction, automobiles, packaging and other fields. However, traditional polyurethane foams release harmful substances during production, causing pollution to the environment. Therefore, the development of environmentally friendly polyurethane foam has become an important research direction in the industry. N,N-dimethylcyclohexylamine (DMCHA) is a highly efficient catalyst and shows unique advantages in environmentally friendly polyurethane foams. This article will discuss in detail the application and advantages of DMCHA in environmentally friendly polyurethane foam.

2. Basic properties of DMCHA

2.1 Chemical structure

The chemical name of DMCHA is N,N-dimethylcyclohexylamine, the molecular formula is C8H17N, and the molecular weight is 127.23 g/mol. Its chemical structure is as follows:

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

2.2 Physical Properties

DMCHA is a colorless to light yellow liquid with a unique amine odor. Its main physical properties are shown in the following table:

Properties value
Boiling point 160-162°C
Density 0.85 g/cm³
Flashpoint 45°C
Solution Easy soluble in water and organic solvents
Steam Pressure 0.5 mmHg at 20°C

2.3 Chemical Properties

DMCHA is a strongly basic organic amine with good catalytic properties. It can react with isocyanate to promote the formation of polyurethane foam. In addition, DMCHA also has good thermal and chemical stability, and is suitable for a variety of reaction conditions.

3. Overview of environmentally friendly polyurethane foam

3.1 Basic concepts of polyurethane foam

Polyurethane foam is a polymer material produced by chemical reaction of polyols and isocyanates. According to its structure and properties, polyurethane foam can be divided into rigid foam, soft foam and semi-rigid foam. Polyurethane foam has excellent properties such as lightweight, heat insulation, sound insulation, and buffering, and is widely used in various fields.

3.2 Definition of environmentally friendly polyurethane foam

Environmentally friendly polyurethane foam refers to polyurethane foam that has less environmental impact during production and use. Compared with traditional polyurethane foam, environmentally friendly polyurethane foam has the following characteristics:

  • Use environmentally friendly raw materials to reduce the release of harmful substances.
  • Reduce energy consumption and waste emissions during production.
  • The product has good durability and recyclability during use.

3.3 Application fields of environmentally friendly polyurethane foam

Environmental-friendly polyurethane foam is widely used in the following fields:

  • Construction Industry: used for wall insulation, roof insulation, floor sound insulation, etc.
  • Furniture Industry: Filling materials for sofas, mattresses, seats and other furniture.
  • Auto industry: used in car seats, instrument panels, door linings, etc.
  • Packaging Industry: Used for buffer packaging for electronic equipment, precision instruments, etc.

4. Application of DMCHA in environmentally friendly polyurethane foam

4.1 The mechanism of action of DMCHA as a catalyst

DMCHA mainly plays a catalyst in the synthesis of polyurethane foam. Its mechanism of action is as follows:

  1. Promote the reaction between isocyanate and polyol: DMCHA can accelerate the reaction between isocyanate and polyol to form polyurethane prepolymers.
  2. Control reaction rate: The catalytic action of DMCHA can effectively control the reaction rate, avoiding too fast or too slow reaction, thereby ensuring the uniformity of the foam structure.
  3. Adjust the holes of foamDiameter and density: By adjusting the amount of DMCHA, the pore size and density of the foam can be controlled, thereby obtaining polyurethane foam with different properties.

4.2 Specific application of DMCHA in environmentally friendly polyurethane foam

The application of DMCHA in environmentally friendly polyurethane foam is mainly reflected in the following aspects:

  1. Rigid polyurethane foam: DMCHA, as a catalyst, can effectively promote the formation of rigid polyurethane foam and improve the strength and thermal insulation properties of the foam.
  2. Soft polyurethane foam: In soft polyurethane foam, DMCHA can adjust the softness and elasticity of the foam, making it more suitable for use in furniture and car seats.
  3. Semi-rigid polyurethane foam: The application of DMCHA in semi-rigid polyurethane foam can balance the hardness and elasticity of foam, and is suitable for packaging and construction fields.

4.3 Comparison of DMCHA with other catalysts

Compared with traditional catalysts, DMCHA has the following advantages:

  • High efficiency: DMCHA has high catalytic efficiency and can significantly shorten the reaction time.
  • Environmentality: DMCHA releases fewer harmful substances during production and use, and meets environmental protection requirements.
  • Stability: DMCHA has good thermal stability and chemical stability, and is suitable for a variety of reaction conditions.

5. Analysis of the advantages of DMCHA in environmentally friendly polyurethane foam

5.1 Environmental performance

The application of DMCHA in environmentally friendly polyurethane foams significantly reduces the release of harmful substances during production. Compared with traditional catalysts, the use of DMCHA can reduce emissions of volatile organic compounds (VOCs), thereby reducing pollution to the environment.

5.2 Catalytic efficiency

DMCHA has efficient catalytic properties and can significantly shorten the molding time of polyurethane foam. This not only improves production efficiency, but also reduces energy consumption and meets the requirements of sustainable development.

5.3 Foam performance

DMCHA can effectively adjust the pore size and density of polyurethane foam, thereby obtaining foam materials of different properties. By adjusting the amount of DMCHA, high-strength, high elasticity, and high heat insulation polyurethane foam can be obtained to meet the needs of different application fields.

5.4 Economy

DMCHA is relatively expensive, but its efficient catalytic and environmentally friendly properties can significantly reduce production costs. In addition, the use of DMCHA can also reduce waste emissions and further reduce environmental governance costs.

6. Product parameters and performance comparison

6.1 Product parameters of DMCHA

The following are the main product parameters of DMCHA:

parameters value
Appearance Colorless to light yellow liquid
Purity ?99%
Boiling point 160-162°C
Density 0.85 g/cm³
Flashpoint 45°C
Solution Easy soluble in water and organic solvents
Steam Pressure 0.5 mmHg at 20°C

6.2 Comparison of performance of environmentally friendly polyurethane foam

The following is a comparison of the properties of environmentally friendly polyurethane foams prepared using DMCHA and traditional catalysts:

Performance Foot using DMCHA Foodles using traditional catalysts
Density (kg/m³) 30-50 30-50
Compressive Strength (kPa) 150-200 120-180
Thermal conductivity (W/m·K) 0.020-0.025 0.025-0.030
Elastic recovery rate (%) 90-95 85-90
VOC emissions (mg/m³) <50 100-150

6.3 Performance requirements for different application fields

The following are the performance requirements for environmentally friendly polyurethane foams in different application fields:

Application Fields Density (kg/m³) Compressive Strength (kPa) Thermal conductivity (W/m·K) Elastic recovery rate (%)
Construction Industry 30-50 150-200 0.020-0.025 90-95
Furniture Industry 20-40 100-150 0.025-0.030 85-90
Auto Industry 40-60 200-250 0.020-0.025 90-95
Packaging Industry 50-70 250-300 0.025-0.030 85-90

7. Conclusion

DMCHA, as an efficient catalyst, shows unique advantages in environmentally friendly polyurethane foams. Its efficient catalytic properties, environmentally friendly properties and economy make it an ideal choice for environmentally friendly polyurethane foam. By adjusting the amount of DMCHA, polyurethane foam with different properties can be obtained to meet the application needs of construction, furniture, automobiles, packaging and other fields. With the increase of environmental awareness and the advancement of technology, DMCHA’s application prospects in environmentally friendly polyurethane foam will be broader.

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How to use DMCHA (N,N-dimethylcyclohexylamine) to enhance the softness and comfort of polyurethane products

Use DMCHA (N,N-dimethylcyclohexylamine) to enhance the softness and comfort of polyurethane products

Introduction

Polyurethane (PU) is a polymer material widely used in daily life and industrial fields. It is highly favored for its excellent mechanical properties, wear resistance, chemical resistance and processability. However, as consumers’ requirements for product comfort and softness continue to increase, how to further improve the softness and comfort of polyurethane products has become an important research direction. As a highly efficient catalyst and modifier, N,N-dimethylcyclohexylamine (DMCHA) has significant application potential in the production of polyurethane products. This article will discuss in detail how to use DMCHA to improve the softness and comfort of polyurethane products, covering its mechanism of action, application methods, product parameters and actual cases.


1. Basic characteristics and mechanism of DMCHA

1.1 Chemical structure and characteristics of DMCHA

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

Chemical Name Molecular Formula Molecular Weight Appearance Boiling point (?) Density (g/cm³)
N,N-dimethylcyclohexylamine C8H17N 127.23 Colorless transparent liquid 159-161 0.85-0.87

DMCHA has the following characteristics:

  • High-efficiency Catalyticity: DMCHA can significantly accelerate the reaction between isocyanate and polyol in the polyurethane reaction and shorten the curing time.
  • Low Volatility: DMCHA has a higher boiling point and low volatility, and is suitable for use in high temperature environments.
  • Good solubility: DMCHA can be compatible with a variety of organic solvents and polyurethane raw materials, making it easy to mix.

1.2 The mechanism of action of DMCHA in polyurethane

The role of DMCHA in polyurethane products is mainly reflected in the following aspects:

  1. Catalytic Effect: DMCHA as a catalyst can accelerate isocyanic acidThe reaction of the esters and polyols promotes the growth and cross-linking of the polyurethane chain, thereby improving the mechanical properties of the material.
  2. Adjust the reaction rate: By adjusting the dosage of DMCHA, the reaction rate of polyurethane can be accurately controlled to avoid defects caused by excessive or slow reaction.
  3. Improve the microstructure: DMCHA can optimize the microstructure of polyurethane, making its molecular chain more uniform, thereby improving the softness and elasticity of the material.

2. Application method of DMCHA in polyurethane products

2.1 Process flow for adding DMCHA

In the production of polyurethane products, DMCHA is usually added to the starting material as a catalyst or modifier. The following is a typical process:

  1. Raw Material Preparation: Weigh polyols, isocyanates, DMCHA and other additives in proportion.
  2. Mix and stir: Mix the polyol and DMCHA to ensure uniform dispersion of the catalyst.
  3. Reaction molding: Mix the mixed raw materials with isocyanate and inject them into the mold for reaction molding.
  4. Post-treatment: Demold, trim and surface treatment of the molded products.

2.2 Addition of DMCHA and Effect

The amount of DMCHA added has a significant impact on the performance of polyurethane products. The following is the impact of different addition amounts on product performance:

DMCHA addition amount (wt%) Reaction time (min) Shore A Tension Strength (MPa) Elongation of Break (%) Softness Evaluation
0.1 15 85 25 300 General
0.3 10 75 22 400 Better
0.5 8 65 20 500 Excellent
0.8 6 60 18 550 Excellent

It can be seen from the table that with the increase of DMCHA addition, the hardness of polyurethane products decreases, and the softness and elongation of break are significantly improved.


3. DMCHA key technology to improve the softness and comfort of polyurethane products

3.1 Optimized formula design

By adjusting the ratio of polyol to isocyanate and combining with the catalytic action of DMCHA, polyurethane formulations with excellent flexibility and comfort can be designed. Here are two typical recipes:

Raw Material Name Formula A (wt%) Formula B (wt%)
Polyol 60 55
Isocyanate 35 40
DMCHA 0.5 0.8
Other additives 4.5 4.2

Formulation A is suitable for ordinary soft products, and Formulation B is suitable for high soft products.

3.2 Control reaction conditions

Reaction temperature and time have an important influence on the performance of polyurethane products. The following is a comparison of performance under different reaction conditions:

Reaction temperature (?) Reaction time (min) Shore A Softness Evaluation
60 10 70 Better
80 8 65 Excellent
100 6 60 Excellent

3.3 Surface treatment technology

Through surface treatment technology (such as coating, embossing, etc.), the comfort and aesthetics of polyurethane products can be further improved. The following is a comparison of the effects of the two surface treatment technologies:

Surface treatment technology Softness Evaluation Comfort Evaluation Aesthetic Evaluation
Coating Treatment Better Excellent Excellent
Embroidery Processing Excellent Excellent Better

IV. Application cases of DMCHA in different polyurethane products

4.1 Soft foam

Soft foam is one of the widely used types of polyurethane products and is often used in household products such as mattresses, sofas, etc. By adding DMCHA, the softness and resilience of the soft foam can be significantly improved.

Product Type DMCHA addition amount (wt%) Shore A Rounce rate (%) Comfort Evaluation
Ordinary soft foam 0.3 75 60 Better
High soft foam 0.5 65 70 Excellent

4.2 Elastomer

Polyurethane elastomers are widely used in soles, seals and other fields. By adding DMCHA, the flexibility and wear resistance of the elastomer can be improved.

Product Type DMCHA addition amount (wt%) Shore A Abrasion resistance (mm³) Comfort Evaluation
Ordinary Elastomer 0.2 80 50 General
High soft elastic body 0.4 70 40 Excellent

4.3 Coating material

Polyurethane coating materials are commonly used in the surface treatment of textiles and leather. By adding DMCHA, the softness and adhesion of the coating can be improved.

Product Type DMCHA addition amount (wt%) Adhesion (N/cm) Softness Evaluation
Ordinary Coating 0.1 5 General
High soft coating 0.3 6 Excellent

V. Summary and Outlook

DMCHA as an efficient catalyst and modifier has significant advantages in improving the softness and comfort of polyurethane products. By optimizing the formulation design, controlling the reaction conditions and adopting advanced surface treatment technology, the role of DMCHA can be fully utilized to produce high-quality polyurethane products that meet consumer needs. In the future, with the continuous development of materials science, DMCHA’s application prospects in the field of polyurethane will be broader.


The above content is a comprehensive analysis of using DMCHA to improve the softness and comfort of polyurethane products. I hope it will be helpful to relevant practitioners and researchers.

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DMCHA (N,N-dimethylcyclohexylamine): an effective low-odor polyurethane foaming catalyst selection

DMCHA (N,N-dimethylcyclohexylamine): an effective low-odor polyurethane foaming catalyst

Catalog

  1. Introduction
  2. Overview of polyurethane foaming technology
  3. Basic Characteristics of DMCHA
  4. The application of DMCHA in polyurethane foaming
  5. Comparison of DMCHA with other catalysts
  6. DMCHA product parameters
  7. The safety and environmental protection of DMCHA
  8. DMCHA market prospects
  9. Conclusion

1. Introduction

Polyurethane (PU) materials are widely used in construction, automobile, furniture, packaging and other fields due to their excellent physical properties and chemical stability. Polyurethane foaming technology is one of the key processes in the manufacturing of these materials, and catalysts play a crucial role in this process. N,N-dimethylcyclohexylamine (DMCHA) has received widespread attention in recent years as a low-odor polyurethane foaming catalyst. This article will introduce the characteristics, applications, product parameters and their advantages in polyurethane foaming in detail.

2. Overview of polyurethane foaming technology

Polyurethane foaming technology is a process of converting liquid raw materials into solid foam materials through chemical reactions. This process mainly includes two reactions: the polymerization reaction of isocyanate and polyol (gel reaction) and the reaction of isocyanate and water (foaming reaction). The catalyst plays a role in accelerating the reaction rate in these two reactions, thereby controlling the formation and structure of the foam.

2.1 Gel reaction

Gel reaction is a reaction between an isocyanate and a polyol to form a polyurethane polymer. This reaction determines the strength and elasticity of the foam.

2.2 Foaming reaction

The foaming reaction is a reaction of isocyanate with water to form carbon dioxide gas, and the gas forms bubbles in the polymer, thereby forming a foam structure. This reaction determines the density and porosity of the foam.

3. Basic characteristics of DMCHA

DMCHA (N,N-dimethylcyclohexylamine) is an organic amine compound with the following basic characteristics:

  • Chemical Structure: C8H17N
  • Molecular Weight: 127.23 g/mol
  • Appearance: Colorless to light yellow liquid
  • odor: low odor
  • Boiling point: about 160°C
  • Density: 0.85 g/cm³
  • Solubilization: Easy to soluble in organic solvents, slightly soluble in water

3.1 Low odor characteristics

The low odor properties of DMCHA make it less effective in the health of operators during polyurethane foaming, and are especially suitable for industrial environments that require long-term exposure.

3.2 High-efficiency catalytic performance

DMCHA shows efficient catalytic performance in both gel reaction and foaming reaction, which can significantly shorten the reaction time and improve production efficiency.

4. Application of DMCHA in polyurethane foaming

DMCHA is widely used in a variety of polyurethane foam products, including rigid foam, soft foam and semi-rigid foam. The following are examples of DMCHA application in different types of foams:

4.1 Hard foam

Rough foam is mainly used in building insulation materials, refrigeration equipment insulation layers, etc. The application of DMCHA in rigid foams can improve the closed cell ratio of foam and enhance thermal insulation performance.

4.2 Soft foam

Soft foam is widely used in furniture, mattresses, car seats, etc. The application of DMCHA in soft foams can improve the elasticity and comfort of the foam.

4.3 Semi-rigid foam

Semi-rigid foam is mainly used in automotive interiors, packaging materials, etc. The application of DMCHA in semi-rigid foams can improve the strength and durability of the foam.

5. Comparison of DMCHA with other catalysts

In the process of polyurethane foaming, commonly used catalysts include tertiary amines, metal salts and organotin catalysts. Here is a comparison of DMCHA with these catalysts:

Catalytic Type Catalytic Efficiency Smell Environmental Cost
DMCHA High Low Good Medium
Term amines High High General Low
Metal Salts in Low Good High
Organic tin High High Poor High

5.1 Catalytic efficiency

DMCHA shows efficient catalytic properties in both gel reaction and foaming reaction, which is comparable to organic tin catalysts and is better than metal salt catalysts.

5.2 Odor

The low odor properties of DMCHA make it less effective in operating environments on people’s health, better than tertiary amines and organotin catalysts.

5.3 Environmental protection

DMCHA has good environmental protection, does not contain harmful metal elements, and is better than organic tin catalysts.

5.4 Cost

The cost of DMCHA is between tertiary amines and metal salt catalysts, and has a high cost-effectiveness.

6. DMCHA product parameters

The following are the detailed product parameters of DMCHA:

parameter name parameter value
Chemical Name N,N-dimethylcyclohexylamine
Molecular formula C8H17N
Molecular Weight 127.23 g/mol
Appearance Colorless to light yellow liquid
odor Low odor
Boiling point About 160°C
Density 0.85 g/cm³
Solution Easy soluble in organic solvents, slightly soluble in water
Flashpoint About 45°C
Storage Conditions Cool and dry places to avoid direct sunlight
Packaging Specifications 25kg/barrel, 200kg/barrel

7. Safety and environmental protection of DMCHA

7.1 Security

DMCHA under normal use of human and environmental conditionsHighly safe. The following are the safe use suggestions for DMCHA:

  • Operation Protection: Wear protective gloves, goggles and protective clothing during operation to avoid direct contact with the skin and eyes.
  • Ventiation Conditions: The operating environment should maintain good ventilation to avoid inhaling steam.
  • Storage conditions: Store in a cool and dry place, away from fire and heat sources.

7.2 Environmental protection

DMCHA does not contain harmful metal elements and has little impact on the environment. Its low odor properties also reduce pollution to the operating environment.

8. DMCHA market prospects

With the increase in environmental awareness and the increase in demand for polyurethane materials, DMCHA, as a highly efficient and low-odor polyurethane foaming catalyst, has broad market prospects. The following are the market development trends of DMCHA:

8.1 Promotion of environmental protection regulations

As the increasingly strict environmental regulations of various countries, traditional high-odor and high-pollution catalysts will be gradually eliminated, and environmentally friendly catalysts such as DMCHA will be widely used.

8.2 Diversified demand for polyurethane materials

The application of polyurethane materials in construction, automobiles, furniture and other fields is constantly expanding, and the demand for catalysts will also increase. DMCHA’s efficient catalytic properties and low odor properties give it a competitive advantage in these areas.

8.3 Technological Innovation

With the continuous innovation of polyurethane foaming technology, the application field of DMCHA will be further expanded and the market prospects are promising.

9. Conclusion

DMCHA (N,N-dimethylcyclohexylamine) is a highly efficient and low-odor polyurethane foaming catalyst, and has important application value in the manufacturing process of polyurethane materials. Its excellent catalytic performance, low odor characteristics and good environmental protection make it have broad development prospects in the market. With the promotion of environmental regulations and the growth of demand for polyurethane materials, DMCHA will be widely used in the future.


Through the detailed introduction of this article, I believe readers have a deeper understanding of the application of DMCHA in polyurethane foaming. DMCHA not only improves production efficiency but also improves the operating environment, making it an ideal choice for polyurethane foaming catalyst.

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