The key role of delayed amine hard bubble catalyst in the production of high-performance polyurethane hard bubbles: improving foam stability and processing time

The key role of delayed amine hard bubble catalyst in the production of high-performance polyurethane hard bubbles: improving foam stability and processing time

Introduction

Polyurethane hard bubbles are a high-performance material widely used in the fields of construction, cold chain, automobile, home appliances, etc. Its excellent thermal insulation properties, mechanical strength and lightweight properties make it one of the indispensable materials in modern industry. However, the production process of polyurethane hard bubbles involves a variety of chemical reactions and physical changes, where the selection and use of catalysts have a critical impact on the performance of the final product. As a new catalyst, the delayed amine hard bubble catalyst has been widely used in the production of high-performance polyurethane hard bubbles in recent years. This article will discuss in detail the key role of delayed amine hard bubble catalyst in the production of polyurethane hard bubbles, especially its advantages in improving foam stability and processing time.

1. Basic principles of polyurethane hard foam

1.1 Chemical composition of polyurethane hard bubbles

Polyurethane hard foam is mainly composed of polyols, isocyanates, foaming agents, catalysts and surfactants. Among them, polyols and isocyanate are the main reactants, forming a polyurethane matrix through polymerization; foaming agents are used to generate bubbles and form foam structures; catalysts are used to regulate the reaction rate; surfactants are used to stabilize the foam structure.

1.2 The formation process of polyurethane hard bubbles

The formation process of polyurethane hard bubbles mainly includes the following steps:

  1. Mix: Mix raw materials such as polyols, isocyanates, foaming agents, catalysts and surfactants in a certain proportion.
  2. Foaming: Under the action of a catalyst, the polyol and isocyanate undergo polymerization reaction, and the foaming agent produces gas to form bubbles.
  3. Gelation: As the reaction progresses, the polyurethane matrix gradually solidifies to form a stable foam structure.
  4. Mature: The foam structure is further cured to achieve final performance.

2. The role of catalysts in the production of polyurethane hard bubbles

2.1 Types of catalysts

The commonly used catalysts in the production of polyurethane hard bubbles mainly include the following categories:

  1. Amine catalysts: such as triethylamine, dimethylamine, etc., which are mainly used to promote the polymerization of polyols and isocyanates.
  2. Metal catalysts: such as organic tin, organic lead, etc., which are mainly used to promote the reaction between isocyanate and water and produce carbon dioxide gas.
  3. Retardant amine catalyst: A new catalyst with the characteristics of delayed reaction and can regulate the reaction rate under specific conditions.

2.2 Mechanism of action of catalyst

The role of catalysts in the production of polyurethane hard bubbles is mainly reflected in the following aspects:

  1. Controlling the reaction rate: The catalyst can accelerate or slow down the polymerization of polyols and isocyanates, thereby regulating the foam formation process.
  2. Stable foam structure: Catalysts can promote the stability of foam structure and prevent bubbles from bursting or collapse.
  3. Optimize processing time: By regulating the reaction rate, the catalyst can optimize processing time and improve production efficiency.

3. Characteristics and advantages of delayed amine hard bubble catalyst

3.1 Characteristics of delayed amine hard bubble catalyst

The delayed amine hard bubble catalyst is a new type of catalyst with the following characteristics:

  1. Delayed reaction: Can delay reaction under specific conditions, thereby extending processing time.
  2. High-efficiency Catalysis: It can efficiently catalyze the polymerization reaction of polyols and isocyanates under specific conditions.
  3. Good stability: Can stabilize the foam structure and prevent bubbles from bursting or collapse.

3.2 Advantages of delayed amine hard bubble catalyst

The delayed amine hard bubble catalyst has the following advantages in the production of high-performance polyurethane hard bubbles:

  1. Improve foam stability: By delaying the reaction, the foam formation process can be better controlled and the foam stability can be improved.
  2. Optimize processing time: By regulating the reaction rate, the processing time can be optimized and production efficiency can be improved.
  3. Improving product performance: Can improve the mechanical properties, thermal insulation properties and durability of polyurethane hard foam.

IV. Application of delayed amine hard bubble catalyst in the production of high-performance polyurethane hard bubbles

4.1 Improve foam stability

Foam stability is a key indicator in the production of polyurethane hard foam. Poor foam stability can cause bubbles to burst or collapse, affecting the performance of the final product. The delayed amine hard bubble catalyst can better control the foam formation process and improve the stability of the foam.

4.1.1 The role of delayed reaction

ExtendedThe delay reaction can prolong the foam formation time and allow enough time for bubbles to grow and stabilize. By regulating the reaction rate, the delayed amine hard bubble catalyst can prevent premature bursting or collapse of the bubble, thereby improving the stability of the bubble.

4.1.2 Practical application cases

In actual production, polyurethane hard bubble products using delayed amine hard bubble catalysts have better foam stability. For example, in building insulation materials, polyurethane hard bubbles using delayed amine hard bubble catalysts have a more uniform bubble structure and higher thermal insulation properties.

4.2 Optimized processing time

Processing time is an important parameter in the production of polyurethane hard bubbles. Too long processing time will lead to low production efficiency, and too short processing time will affect product quality. By regulating the reaction rate, the delayed amine hard bubble catalyst can optimize processing time and improve production efficiency.

4.2.1 The role of regulating reaction rate

The delayed amine hard bubble catalyst can delay the reaction under certain conditions, thereby extending processing time. By regulating the reaction rate, the delayed amine hard bubble catalyst can make the foam formation process more controllable, thereby improving production efficiency.

4.2.2 Practical application cases

In actual production, polyurethane hard bubble products using delayed amine hard bubble catalysts have a more optimized processing time. For example, in cold chain insulation materials, polyurethane hard bubbles using delayed amine hard bubble catalysts have a shorter processing time, thereby improving production efficiency.

4.3 Improve product performance

The delayed amine hard bubble catalyst can not only improve foam stability and optimize processing time, but also improve the mechanical properties, thermal insulation properties and durability of polyurethane hard bubbles.

4.3.1 Improvement of mechanical properties

The delayed amine hard bubble catalyst can promote uniform curing of the polyurethane matrix, thereby improving the mechanical properties of the polyurethane hard bubble. For example, polyurethane hard bubbles using delayed amine hard bubble catalysts have higher compressive strength and tensile strength.

4.3.2 Improvement of thermal insulation performance

The retarded amine hard bubble catalyst can stabilize the foam structure, thereby improving the thermal insulation performance of polyurethane hard bubbles. For example, polyurethane hard bubbles using retardant amine hard bubble catalysts have lower thermal conductivity, thereby improving thermal insulation properties.

4.3.3 Improved durability

The delayed amine hard bubble catalyst can promote uniform curing of the polyurethane matrix, thereby improving the durability of the polyurethane hard bubble. For example, polyurethane hard bubbles using delayed amine hard bubble catalysts have better aging resistance and weather resistance.

V. Product parameters of delayed amine hard bubble catalyst

5.1 Product Parameters

parameter name parameter value Instructions
Catalytic Type Retardant amine catalyst It has the characteristics of delayed reaction
Reaction delay time 5-10 minutes Time to delay reaction under specific conditions
Catalytic Efficiency Efficient Can efficiently catalyze the polymerization reaction of polyols and isocyanates
Stability OK Can stabilize the foam structure and prevent bubbles from bursting or collapse
Applicable temperature range 20-40℃ Have good catalytic effect in the range of 20-40℃
Applicable pH range 6-8 Give good catalytic effect in pH 6-8 range
Storage Conditions Cool and dry place Avoid direct sunlight and high temperatures
Shelf life 12 months Storage in a cool and dry place, with a shelf life of 12 months

5.2 Product Parameter Analysis

The product parameters of the delayed amine hard bubble catalyst show that it has the characteristics of delayed reaction, efficient catalysis, and good stability. In practical applications, the delayed amine hard bubble catalyst can delay the reaction under specific conditions, thereby improving foam stability and optimizing processing time. At the same time, the retarded amine hard bubble catalyst has a wide applicable temperature and pH range, and can maintain a stable catalytic effect under different production conditions.

VI. Methods for using delayed amine hard bubble catalyst

6.1 How to use

The method of using delayed amine hard bubble catalyst mainly includes the following steps:

  1. Raw material preparation: Prepare raw materials such as polyols, isocyanates, foaming agents, surfactants and other raw materials in a certain proportion.
  2. Catalytic Addition: Add the delayed amine hard bubble catalyst to the polyol in a certain proportion and stir evenly.
  3. Mixing reaction: Mix the mixed polyol and isocyanate in a certain proportion to start the reaction.
  4. SendBubble molding: During the reaction, the foaming agent produces gas, forming bubbles, and finally forming polyurethane hard bubbles.

6.2 Precautions for use

When using delayed amine hard bubble catalyst, the following points should be paid attention to:

  1. Catalytic Addition Load: The amount of catalyst added should be adjusted according to the specific production conditions. Too much or too little will affect the reaction effect.
  2. Mix evenly: The catalyst should be mixed well with the polyol to ensure the catalytic effect.
  3. Reaction Condition Control: Conditions such as reaction temperature, pH value should be controlled within the scope of application to ensure catalytic effect.

7. Future development trends of delayed amine hard bubble catalysts

7.1 Environmentally friendly catalyst

With the increase in environmental protection requirements, the delayed amine hard bubble catalyst will develop towards the environmental protection direction in the future. Environmentally friendly catalysts have the characteristics of low toxicity, low volatility, and easy degradation, which can reduce environmental pollution.

7.2 High-efficiency catalyst

In the future, delayed amine hard bubble catalysts will develop towards high efficiency. High-efficiency catalysts have higher catalytic efficiency and longer service life, which can improve production efficiency and reduce production costs.

7.3 Multifunctional catalyst

In the future, delayed amine hard bubble catalysts will develop towards a multifunctional direction. Multifunctional catalysts not only have catalytic effects, but also have various functions such as stabilizing foam and improving product performance, which can meet different production needs.

Conclusion

The delayed amine hard bubble catalyst plays a key role in the production of high-performance polyurethane hard bubbles, especially in improving foam stability and optimizing processing time. By delaying the reaction, the delayed amine-hard bubble catalyst can better control the foam formation process and improve the stability of the foam; by adjusting the reaction rate, the delayed amine-hard bubble catalyst can optimize the processing time and improve production efficiency. In the future, with the improvement of environmental protection requirements and the advancement of technology, delayed amine hard bubble catalysts will develop towards environmentally friendly, efficient and multifunctional, providing better and more efficient solutions for the production of polyurethane hard bubbles.

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