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

2025-03-09by admin

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

Catalog

Introduction
Basic concept of polyurethane foam
Overview of Retarded Amine Catalyst A400
Mechanism of action of delayed amine catalyst A400
The influence of delayed amine catalyst A400 on the open-cell structure of polyurethane foam
Comparison of product parameters and performance
Practical application case analysis
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

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.