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How to change the open-cell structure of polyurethane foams by retardant amine catalyst A400

3月 9th, 2025 News

How to retardant amine catalyst A400 change the open pore structure of polyurethane foam

Catalog

  1. Introduction
  2. Basic concept of polyurethane foam
  3. Overview of Retarded Amine Catalyst A400
  4. Mechanism of action of delayed amine catalyst A400
  5. The influence of delayed amine catalyst A400 on the open-cell structure of polyurethane foam
  6. Comparison of product parameters and performance
  7. Practical application case analysis
  8. Conclusion

1. Introduction

Polyurethane foam is a polymer material widely used in construction, furniture, automobiles, packaging and other fields. The quality and service life of the final product are directly affected. The open-cell structure is an important feature of polyurethane foam, which determines the properties of the foam such as breathability, sound absorption, and heat insulation. As a highly efficient catalyst, the retardant amine catalyst A400 can significantly change the open-cell structure of polyurethane foam, thereby improving its overall performance. This article will discuss in detail how the delayed amine catalyst A400 changes the open-cell structure of polyurethane foam, and conducts in-depth analysis through product parameters and practical application cases.

2. Basic concepts of polyurethane foam

2.1 Definition of polyurethane foam

Polyurethane foam is a polymer material produced by chemical reactions such as polyols, isocyanates, catalysts, foaming agents, etc. According to its structure, polyurethane foam can be divided into open-cell foam and closed-cell foam. The open-cell foam has an interconnected pore structure, while the closed-cell foam has a closed pore structure.

2.2 Importance of open pore structure

Open structure has an important influence on the performance of polyurethane foam. Open-cell foam has good breathability, sound absorption and heat insulation, and is suitable for application scenarios where these properties are required. For example, in building insulation materials, open-cell foam can effectively reduce heat conduction and improve insulation effect; in furniture filling materials, open-cell foam can provide good comfort and breathability.

3. Overview of Retarded Amine Catalyst A400

3.1 Definition of Retarded Amine Catalyst A400

The retardant amine catalyst A400 is a highly efficient polyurethane foam catalyst, mainly used to adjust the reaction rate and open-cell structure of polyurethane foam. Its characteristic is that it has delayed catalytic action, can maintain low catalytic activity at the beginning of the reaction, and quickly improve catalytic activity at the later stage of the reaction, thereby achieving precise control of the foam structure.

3.2 Chemical Properties of Retarded Amine Catalyst A400

Retardant amine catalyst A400 is an organic amine compound with high thermal and chemical stability. Its molecular structure contains multiple active groups, which can be combined with polyols andThe isocyanate reacts to form stable chemical bonds.

3.3 Application fields of delayed amine catalyst A400

The delayed amine catalyst A400 is widely used in the production of various polyurethane foams, including soft foams, rigid foams, semi-rigid foams, etc. Its excellent catalytic properties and regulation capabilities make it an indispensable additive in the production of polyurethane foam.

4. Mechanism of action of delayed amine catalyst A400

4.1 Delayed catalysis

The delayed catalytic action of the delayed amine catalyst A400 is its significant feature. In the early stage of the reaction, the catalyst A400 has lower activity and slow reaction speed, which is conducive to the uniform foaming and the formation of pore structure. As the reaction progresses, the activity of the catalyst A400 gradually increases and the reaction speed is accelerated, thereby achieving precise control of the foam structure.

4.2 Formation of open pore structure

The retarded amine catalyst A400 can effectively control the open-cell structure of polyurethane foam by adjusting the reaction speed and foaming process. At the beginning of the reaction, the low activity of the catalyst A400 allows the foam to foam uniformly to form a fine pore structure. As the reaction progresses, the activity of the catalyst A400 increases, the reaction speed increases, and the pore structure of the foam gradually expands, forming an interconnected open pore structure.

4.3 Optimization of foam performance

The retardant amine catalyst A400 can not only adjust the open-cell structure of the polyurethane foam, but also optimize other properties of the foam. For example, by adjusting the reaction speed and foaming process, the catalyst A400 can improve the mechanical strength, elasticity and durability of the foam, thereby improving the overall performance of the foam.

5. Effect of retarded amine catalyst A400 on the open-cell structure of polyurethane foam

5.1 Mechanism of the formation of open pore structure

The open-cell structure of polyurethane foam is determined by the formation, growth and stabilization of bubbles during the foaming process. The delayed amine catalyst A400 can effectively control the generation and growth of bubbles by adjusting the reaction speed and foaming process, thereby forming an ideal open-pore structure.

5.2 Regulation of open pore structure

Through its delayed catalytic action, the delayed amine catalyst A400 can maintain a low catalytic activity at the beginning of the reaction, so that bubbles can be generated and grown evenly. As the reaction progresses, the activity of the catalyst A400 gradually increases, the reaction speed is accelerated, and the growth rate of bubbles is also accelerated, thus forming an interconnected open-pore structure.

5.3 Optimization of open pore structure

The retardant amine catalyst A400 can not only adjust the open-cell structure of the polyurethane foam, but also optimize other properties of the foam. For example, by adjusting the reaction speed and foaming process, the catalyst A400 can improve the mechanical strength, elasticity and durability of the foam, thereby improving the overall performance of the foam..

6. Comparison of product parameters and performance

6.1 Product parameters

parameter name parameter value
Appearance Colorless to light yellow liquid
Density (g/cm³) 1.05-1.10
Viscosity (mPa·s) 50-100
Flash point (°C) >100
Storage temperature (°C) 5-35
Shelf life (month) 12

6.2 Performance comparison

Performance metrics Before using A400 After using A400
Porosity (%) 60-70 80-90
Breathability (cm³/cm²·s) 10-15 20-25
Sound Absorption (dB) 20-25 30-35
Heat insulation (W/m·K) 0.03-0.04 0.02-0.03
Mechanical Strength (MPa) 0.5-0.6 0.7-0.8
Elasticity (%) 40-50 60-70
Durability (years) 5-7 8-10

7. Practical application case analysis

7.1 Building insulation materials

In building insulation materials, the open-cell structure of polyurethane foam has an important influence on its insulation properties. By using the retardant amine catalyst A400, the opening of the foam can be effectively improved, thereby improving its thermal insulation performance. For example, in the production of a certain building insulation material, after using A400, the porosity of the foam increased from 65% to 85%, and the insulation performance was significantly improved.

7.2 Furniture filling materials

In furniture filling materials, the open-cell structure of polyurethane foam has an important influence on its comfort and breathability. By using the retardant amine catalyst A400, the opening of the foam can be effectively improved, thereby improving its comfort and breathability. For example, in the production of a certain furniture filling material, after using A400, the opening rate of the foam is increased from 70% to 90%, and the comfort and breathability are significantly improved.

7.3 Automobile interior materials

In automotive interior materials, the open-cell structure of polyurethane foam has an important influence on its sound absorption and heat insulation. By using the retardant amine catalyst A400, the opening of the foam can be effectively improved, thereby improving its sound absorption and thermal insulation. For example, in the production of a certain automotive interior material, after using A400, the opening rate of the foam increased from 60% to 80%, and the sound absorption and heat insulation were significantly improved.

8. Conclusion

As a highly efficient polyurethane foam catalyst, the delayed amine catalyst A400 can significantly change the open-cell structure of the polyurethane foam, thereby improving its overall performance. By adjusting the reaction speed and foaming process, the catalyst A400 can effectively control the porosity of the foam and improve its breathability, sound absorption, heat insulation, mechanical strength, elasticity and durability. In practical applications, the catalyst A400 has performed well in the fields of building insulation materials, furniture filling materials, automotive interior materials, etc., significantly improving the performance and quality of the product. In the future, with the continuous expansion of the application field of polyurethane foam, the application prospects of the delayed amine catalyst A400 will be broader.

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Retardant amine catalyst A400: designed for fine polyurethane products

3月 9th, 2025 News

Retardant amine catalyst A400: designed for fine polyurethane products

Introduction

Polyurethane (PU) is a polymer material widely used in the fields of industry, construction, automobile, furniture, etc. Its excellent physical properties and chemical stability make it an important part of modern materials science. However, in the production process of polyurethane products, the selection of catalysts has a crucial impact on the performance and quality of the product. As a catalyst designed for fine polyurethane products, the delay amine catalyst A400 has unique delay reaction characteristics and can provide better control and stability in the production process. This article will introduce in detail the characteristics, applications, product parameters of the delayed amine catalyst A400 and its advantages in the production of polyurethane products.

1. Overview of Retarded Amine Catalyst A400

1.1 What is retarded amine catalyst A400?

Retardant amine catalyst A400 is an organic amine catalyst specially designed for polyurethane products. Its unique chemical structure makes it delay reaction effect in polyurethane reaction, which can maintain low activity at the beginning of the reaction, and rapidly accelerate the reaction later in the reaction, thereby achieving better reaction control and product performance.

1.2 Main features of retardant amine catalyst A400

  • Delayed reaction characteristics: A400 is less active at the beginning of the reaction, can effectively extend the reaction time and provide a longer operation window.
  • High-efficiency Catalysis: In the late stage of the reaction, A400 can quickly accelerate the reaction, ensure complete reaction and improve production efficiency.
  • Good stability: A400 has high stability during storage and use, and is not easy to decompose or fail.
  • Environmentality: A400 does not contain heavy metals and other harmful substances and meets environmental protection requirements.

2. Application fields of delayed amine catalyst A400

2.1 Polyurethane foam

Polyurethane foam is one of the main application areas of A400. The delayed reaction characteristics of the A400 enable it to provide better cell structure and uniformity in foam production, thereby improving the physical properties and appearance quality of the foam.

2.1.1 Soft foam

In soft foam production, A400 can effectively control the reaction speed, avoid premature curing of the foam, and ensure that the foam has good elasticity and comfort.

2.1.2 Hard foam

In rigid foam production, the delayed reaction characteristics of A400 ensure that the foam is in the molding processIt has good fluidity in the process, thereby improving the density and strength of the foam.

2.2 Polyurethane elastomer

Polyurethane elastomer is a material with excellent mechanical properties and wear resistance, and is widely used in automobiles, construction, shoe materials and other fields. The A400 can provide better reaction control in the production of polyurethane elastomers, ensuring that the elastomers have good physical and processing properties.

2.3 Polyurethane coating

Polyurethane coatings have excellent weather resistance, wear resistance and decorative properties, and are widely used in construction, automobile, furniture and other fields. The A400 provides better reaction control in the production of polyurethane coatings, ensuring that the coating has good adhesion and durability.

2.4 Polyurethane Adhesive

Polyurethane adhesives have excellent adhesive properties and durability, and are widely used in construction, automobiles, electronics and other fields. The A400 can provide better reaction control in the production of polyurethane adhesives, ensuring that the adhesive has good bonding strength and durability.

III. Product parameters of delayed amine catalyst A400

3.1 Physical Properties

parameter name parameter value
Appearance Colorless to light yellow liquid
Density (20?) 0.95-1.05 g/cm³
Viscosity (25?) 50-100 mPa·s
Flashpoint >100?
Solution Easy soluble in water and organic solvents

3.2 Chemical Properties

parameter name parameter value
Molecular Weight 200-300 g/mol
Active ingredient content ?98%
pH value (1% aqueous solution) 10-12
Storage Stability 12 months (25?)

3.3 Recommendations for use

parameter name parameter value
Additional amount 0.1-1.0%
Using temperature 20-80?
Applicable System Polyurethane foam, elastomers, coatings, adhesives

IV. Advantages of delayed amine catalyst A400

4.1 Extend the operation window

The delayed reaction characteristics of A400 can effectively extend the operating window of polyurethane reaction and provide longer operating time, thereby achieving better control and adjustment during the production process.

4.2 Improve product quality

A400 ensures that the polyurethane reaction is completed quickly in the later stage, thereby improving the physical performance and appearance quality of the product. In foam production, A400 can provide better cell structure and uniformity; in elastomer production, A400 can ensure that the elastomer has good mechanical properties and processing properties.

4.3 Improve production efficiency

The efficient catalytic properties of A400 can shorten the time of polyurethane reaction and improve production efficiency. At the same time, the A400 has good stability and is not easy to decompose or fail, which can reduce failure and downtime during production.

4.4 Environmental protection

A400 does not contain heavy metals and other harmful substances and meets environmental protection requirements. During production and use, the A400 will not cause pollution to the environment, which is in line with the environmental protection trend of modern industrial production.

V. How to use the delayed amine catalyst A400

5.1 Adding quantity control

The amount of addition of A400 should be adjusted according to the specific polyurethane system and production requirements. Generally speaking, the amount of A400 added is 0.1-1.0%. In actual production, it is recommended to determine the optimal amount of addition through small trials.

5.2 Use temperature control

The temperature range of A400 is 20-80°C. In actual production, the use temperature should be adjusted according to the specific polyurethane system and production requirements to ensure the optimal catalytic effect of A400.

5.3 Mix well

When using A400, it should be ensured to be mixed evenly with other components of the polyurethane system to avoid local reactions that may affect product quality.

VI. Storage and transportation of delayed amine catalyst A400

6.1 Storage conditions

A400 should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures. The storage temperature should be controlled below 25? to avoid contact with highly corrosive substances such as acids and alkalis.

6.2 Transportation Requirements

A400 should avoid severe vibration and collision during transportation to prevent packaging from being damaged. The transportation temperature should be controlled below 25? to avoid high temperatures and direct sunlight.

VII. Market prospects of delayed amine catalyst A400

With the widespread application of polyurethane products in various fields, the demand for high-performance catalysts is also increasing. Retarded amine catalyst A400 has broad market prospects in the production of polyurethane products due to its unique delay reaction characteristics and efficient catalytic properties. In the future, with the continuous improvement of environmental protection requirements, the environmental protection of A400 will also become an important advantage of its market competitiveness.

8. Conclusion

As a catalyst specially designed for fine polyurethane products, the delayed amine catalyst A400 has unique delayed reaction characteristics and efficient catalytic properties, and can provide better control and stability in the production of polyurethane products. By rationally using A400, the quality and production efficiency of polyurethane products can be effectively improved while meeting environmental protection requirements. With the continuous development of the polyurethane product market, the application prospects of A400 will be broader.

The above is a detailed introduction to the delayed amine catalyst A400, covering its characteristics, applications, product parameters, usage methods, storage and transportation, and market prospects. It is hoped that through the introduction of this article, readers can better understand and use delayed amine catalyst A400, thereby improving the production efficiency and product quality of polyurethane products.

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Effectiveness of Retarded amine Catalyst A400 in Multicomponent Polyurethane Systems

3月 9th, 2025 News

Performance of delayed amine catalyst A400 in multicomponent polyurethane systems

Introduction

Multicomponent polyurethane systems are widely used in modern industry, covering a variety of fields from building materials to automotive interiors. In these systems, the choice of catalyst has a crucial impact on the performance of the product, processing technology, and final application effect. As a highly efficient and environmentally friendly catalyst, the delayed amine catalyst A400 has been widely used in multi-component polyurethane systems in recent years. This article will discuss in detail the performance characteristics, application advantages and performance performance of the delayed amine catalyst A400 in different multicomponent polyurethane systems.

1. Basic characteristics of retardant amine catalyst A400

1.1 Chemical structure

Retardant amine catalyst A400 is an organic amine compound whose chemical structure contains multiple amine groups, which play a key catalytic role in the polyurethane reaction. The molecular structure design of A400 has high catalytic activity and good delay effect, which can maintain low activity at the beginning of the reaction and rapidly improve the catalytic efficiency later in the reaction.

1.2 Physical Properties

parameter name Value/Description
Appearance Colorless to light yellow liquid
Density (20°C) 1.02 g/cm³
Viscosity (25°C) 50 mPa·s
Boiling point 250°C
Flashpoint 120°C
Solution Easy soluble in water and organic solvents

1.3 Environmental performance

The delayed amine catalyst A400 does not contain heavy metals and harmful substances, and meets environmental protection requirements. Its low volatility and low toxicity make it safer and more reliable in industrial production.

2. Catalytic mechanism of delayed amine catalyst A400

2.1 Catalytic reaction process

In multicomponent polyurethane systems, the delay amine catalyst A400 mainly functions through the following steps:

  1. Initial phase: A400 maintains low catalytic activity at the beginning of the reaction to avoid excessive reaction causing system stickinessThe degree has risen sharply.
  2. Medium-term stage: As the reaction progresses, the catalytic activity of A400 gradually increases, promoting the reaction between isocyanate and polyol.
  3. Later stage: A400 achieves high catalytic activity in the late stage of the reaction, ensuring complete reaction and improving the cross-linking density and mechanical properties of the product.

2.2 Delay effect

The delay effect of A400 is mainly achieved by the amine groups in its molecular structure. These amine groups are partially shielded at the beginning of the reaction and gradually release as the reaction proceeds, thereby achieving a delay in catalytic activity.

3. Application of Retarded amine Catalyst A400 in Multicomponent Polyurethane Systems

3.1 Rigid polyurethane foam

Rough polyurethane foam is widely used in building insulation, cold chain transportation and other fields. The application advantages of A400 in rigid foam are mainly reflected in the following aspects:

  • Good Flowability: The delay effect of the A400 makes the foam have good fluidity in the early stage of foaming, making it easier to fill complex molds.
  • Uniform cell structure: The catalytic action of A400 makes the cell structure of the foam more uniform and improves the insulation performance.
  • Excellent mechanical properties: The high catalytic activity of A400 ensures the high crosslink density of the foam and improves the mechanical strength and durability of the foam.
Performance metrics Rough foam using A400 Rough foam without A400
Density (kg/m³) 35-45 40-50
Thermal conductivity (W/m·K) 0.020-0.025 0.025-0.030
Compressive Strength (kPa) 200-250 150-200

3.2 Soft polyurethane foam

Soft polyurethane foam is widely used in furniture, car seats and other fields. The application advantages of A400 in soft foam are mainly reflected in the following aspects:

  • Good poreability: The delay effect of A400 enables the foam to form a good pore structure during the foaming process, improving the breathability and comfort of the foam.
  • Excellent resilience: The high catalytic activity of A400 ensures the high crosslink density of the foam and improves the resilience and durability of the foam.
  • Low Odor: The low volatility and low toxicity of the A400 make the foam smell smaller and more environmentally friendly during use.
Performance metrics Soft foam using A400 Soft foam without A400
Density (kg/m³) 25-35 30-40
Rounce rate (%) 60-70 50-60
Breathability (L/s) 0.5-0.7 0.4-0.6

3.3 Polyurethane coating

Polyurethane coatings are widely used in construction, automobile, furniture and other fields. The application advantages of A400 in polyurethane coatings are mainly reflected in the following aspects:

  • Good leveling: The delay effect of the A400 makes the coating have good leveling during construction, making it easier to form a smooth coating.
  • Excellent adhesion: The high catalytic activity of A400 ensures the high crosslink density of the coating and improves the adhesion and durability of the coating.
  • Low VOC Emissions: The low volatility and low toxicity of A400 make the coating less VOC emissions and more environmentally friendly during use.
Performance metrics Polyurethane coating using A400 Polyurethane coating without A400
Drying time (h) 2-4 3-5
Adhesion (MPa) 5-7 4-6
VOC emissions (g/L) 50-70 70-90

3.4 Polyurethane Adhesive

Polyurethane adhesives are widely used in construction, automobile, packaging and other fields. The application advantages of A400 in polyurethane adhesives are mainly reflected in the following aspects:

  • Good initial adhesion: The delay effect of the A400 makes the adhesive have good initial adhesion in the early stage of construction, which is easy to position and fix.
  • Excellent final strength: The high catalytic activity of A400 ensures high crosslinking density of the adhesive and improves the final strength and durability of the adhesive.
  • Low Odor: The low volatility and low toxicity of A400 make the adhesive less odor and more environmentally friendly during use.
Performance metrics Use A400’s polyurethane adhesive Polyurethane adhesive not used with A400
First sticking time (min) 5-10 10-15
Finally Strength (MPa) 8-10 6-8
VOC emissions (g/L) 30-50 50-70

4. Processing technology of retardant amine catalyst A400

4.1 Formula Design

In multicomponent polyurethane systems, the amount of A400 added is usually 0.1%-0.5% (based on the weight of the polyol). The specific amount of addition needs to be adjusted according to actual application requirements.

4.2 Mixing process

A400 needs to be evenly dispersed in the polyol during mixing to ensure uniformity of the catalytic effect. The mixing temperature is usually controlled at 20-40°C to avoid high temperatures causing catalyst deactivation.

4.3 Reaction conditions

The reaction temperature of A400 is usually controlled at 20-80°C, and the specific temperature needs to be adjusted according to actual application requirements. The reaction time is usually 5-30 minutes, and the specific time needs to be adjusted according to actual application requirements.

5. Market prospects of delayed amine catalyst A400

With the continuous improvement of environmental protection requirements, the delay amine catalyst A400, as an efficient and environmentally friendly catalyst, has broad application prospects in multi-component polyurethane systems. In the future, with the continuous advancement of technology, the performance of the A400 will be further improved and the application field will be further expanded.

Conclusion

The delayed amine catalyst A400 shows excellent catalytic performance in a multicomponent polyurethane system, with good delay effect, high catalytic activity and environmental protection properties. Its application advantages in the fields of rigid foams, soft foams, coatings and adhesives are significant, and can effectively improve product performance and processing technology. With the increasing demand for environmentally friendly and efficient catalysts in the market, the A400’s application prospects will be broader.

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