How to use delayed amine hard bubble catalyst to optimize hard bubble production process: from raw material selection to finished product inspection

Catalog

Introduction
Overview of hard bubble production process
Properties of delayed amine hard bubble catalyst
Raw Material Selection
Production process optimization
Finished product inspection
Conclusion

1. Introduction

Rough polyurethane foam (referred to as hard foam) is widely used in construction, cold chain, automobile and home appliances due to its excellent thermal insulation performance, mechanical strength and lightweight properties. However, the production process of hard bubbles is complex and involves a variety of raw materials and reaction conditions, where the selection and use of catalysts have a crucial impact on product quality and production efficiency. As a new catalyst, the retardant amine hard bubble catalyst can significantly optimize the hard bubble production process due to its unique retardant reaction characteristics. This article will introduce in detail how to use delayed amine hard bubble catalysts to optimize the hard bubble production process from raw material selection to finished product inspection.

2. Overview of hard bubble production process

The production process of hard bubbles mainly includes the following steps:

Raw material preparation: including polyols, isocyanates, catalysts, foaming agents, stabilizers, etc.
Mix: Mix polyols, catalysts, foaming agents, stabilizers, etc. evenly.
Reaction: React the mixed raw materials with isocyanate to form a foam.
Mature: The foam is matured in the mold to form the final product.
Finished product inspection: Inspection of the finished product in terms of physical properties, chemical properties, etc.

3. Characteristics of delayed amine hard bubble catalyst

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

Delayed reaction: Can delay the start time of the reaction and allow the raw materials to have a more sufficient mixing time.
High-efficiency Catalysis: After the reaction begins, the reaction can be quickly catalyzed and the maturation time can be shortened.
Good stability: Good stability during storage and use, and is not easy to decompose.
Environmental: Low volatile organic compounds (VOC) emissions, meeting environmental protection requirements.

3.1 Parameters of delayed amine hard bubble catalyst

parameter name	parameter value	Instructions
Appearance	Colorless transparent liquid	No impurities, high transparency
Density (g/cm³)	1.05-1.10	Moderate density, easy to mix
Viscosity (mPa·s)	50-100	Moderate viscosity, easy to flow
Flash point (℃)	>100	High flash point, high security
Storage Stability	>12 months	Long-term storage does not deteriorate
Reaction delay time	10-30 seconds	Delay reaction time for easy mixing
Mature Time	2-5 minutes	Rapid maturation to improve production efficiency

4. Raw material selection

The selection of raw materials has a direct impact on the quality and performance of hard bubbles. The following are the key points for selecting main raw materials:

4.1 Polyol

Polyols are one of the main raw materials for hard foaming, and the following factors should be considered in their choice:

Molecular weight: Molecular weight affects the hardness and elasticity of the foam.
Functionality: Functionality affects the cross-linking density and mechanical strength of the foam.
Viscosity: Viscosity affects mixing and flow properties.

4.2 Isocyanate

Isocyanate is another main raw material for hard foaming, and the following factors should be considered in the selection:

NCO content: NCO content affects reaction speed and foam density.
Viscosity: Viscosity affects mixing and flow properties.
Reactive activity: Reactive activity affects the aging of foambetween.

4.3 Foaming agent

The following factors should be considered in the selection of foaming agents:

Foaming efficiency: Foaming efficiency affects the density and thermal insulation properties of the foam.
Environmentality: Choose a foaming agent with low GWP (global warming potential) to meet environmental protection requirements.
Stability: The foaming agent has good stability during storage and use.

4.4 Stabilizer

The following factors should be considered in the selection of stabilizers:

Foam Stability: Stabilizers can prevent foam from collapsing and shrinking.
Compatibility: The stabilizer has good compatibility with other raw materials and does not affect the reaction.

4.5 Catalyst

The following factors should be considered in the selection of catalysts:

Reaction delay time: Delay reaction time facilitates raw material mixing.
Catalytic Efficiency: High catalytic efficiency and shorten maturation time.
Stability: The catalyst has good stability during storage and use.

5. Production process optimization

Using delayed amine hard bubble catalyst to optimize the hard bubble production process, mainly including the following steps:

5.1 Raw material mixing

Raw material mixing is a key step in hard bubble production. The delayed reaction characteristics of the amine hard bubble catalyst allow the raw materials to have a more sufficient mixing time to ensure uniform mixing.

5.1.1 Hybrid Equipment

Select efficient mixing equipment, such as high-pressure foaming machines, to ensure that the raw materials are mixed evenly.

5.1.2 Mixing time

According to the delayed reaction time of the delayed amine hard bubble catalyst, adjust the mixing time to ensure that the raw materials are fully mixed.

5.2 Reaction control

Reaction control is the core step in hard bubble production. Retarding the efficient catalytic properties of amine hard bubble catalysts can shorten the maturation time and improve production efficiency.

5.2.1 Reaction temperature

Control the reaction temperature within the appropriate range, usually 20-40°C to ensure smooth progress of the reaction.

5.2.2 Reaction pressure

Control the reaction pressure within the appropriate range, usually 0.1-0.3MPa, to ensure uniform foaming of the foam.

5.3 Cultivation process

The maturation process is the latter step in hard bubble production. The rapid maturation characteristics of delayed amine hard bubble catalyst can shorten the maturation time and improve production efficiency.

5.3.1 Craving temperature

Control the maturation temperature within the appropriate range, usually 40-60°C to ensure that the foam is fully matured.

5.3.2 Crafting time

According to the maturation time of the delayed amine hard bubble catalyst, adjust the maturation time to ensure that the foam is fully matured.

5.4 Process parameter optimization

Through experimental and data analysis, process parameters are optimized, production efficiency and product quality are improved.

5.4.1 Experimental Design

Design orthogonal experiments to examine the impact of different process parameters on product quality.

5.4.2 Data Analysis

Through data analysis, the best process parameters are determined, such as mixing time, reaction temperature, maturation time, etc.

6. Finished product inspection

Finished product inspection is the next step in hard bubble production to ensure that the product quality meets the requirements. The following are the main items for finished product inspection:

6.1 Physical performance inspection

6.1.1 Density

Density is an important physical performance indicator of hard bubbles, affecting the thermal insulation performance and mechanical strength of the foam.

Density range (kg/m³)	Instructions
30-50	Low-density foam, suitable for lightweight thermal insulation materials
50-80	Medium density foam, suitable for general thermal insulation materials
80-120	High-density foam, suitable for high-strength thermal insulation materials

6.1.2 Compression Strength

Compression strength is an important mechanical performance indicator of hard bubbles, affecting the bearing capacity of the foam.

Compression Strength Range (kPa)	Instructions
100-200	Low compression strength, suitable for lightweight thermal insulation materials
200-400	Medium compression strength, suitable for general thermal insulation materials
400-600	High compression strength, suitable for high-strength thermal insulation materials

6.1.3 Thermal conductivity

Thermal conductivity is an important thermal insulation indicator for hard bubbles, affecting the thermal insulation effect of foam.

Thermal conductivity range (W/m·K)	Instructions
0.020-0.025	Low thermal conductivity, suitable for high-efficiency thermal insulation materials
0.025-0.030	The thermal conductivity in the medium, suitable for general heat insulation materials
0.030-0.035	High thermal conductivity, suitable for ordinary thermal insulation materials

6.2 Chemical performance inspection

6.2.1 Chemical resistance

Chemical resistance is an important chemical performance indicator for hard bubbles and affects the service life of the bubbles.

Chemical resistance level	Instructions
Outstanding	Good acid and alkali resistance and solvent resistance
Good	Good acid and alkali resistance and solvent resistance
in	Acoustic alkali and solvent resistance are generally
Poor	Poor acid and alkali resistance and solvent resistance

6.2.2 Aging resistance

Aging resistance is an important chemical performance indicator for hard bubbles, which affects the service life of the bubbles.

Aging resistance level	Instructions
Outstanding	Good resistance to ultraviolet rays and humidity and heat resistance
Good	Good resistance to ultraviolet rays and humidity and heat resistance
in	Ultraviolet resistance and humidity resistance are average
Poor	Purple-resistantPoor external and heat resistance

6.3 Appearance inspection

Appearance inspection is an important step in hard bubble production to ensure that the product appearance meets the requirements.

6.3.1 Surface flatness

Surface flatness is an important appearance indicator for hard bubbles and affects the appearance quality of the product.

Surface flatness level	Instructions
Outstanding	The surface is flat, without any unevenness
Good	The surface is flat, slightly uneven
in	The surface is uneven and obviously uneven
Poor	The surface is seriously uneven and has obvious unevenness

6.3.2 Color uniformity

Color uniformity is an important appearance indicator for hard bubbles and affects the appearance quality of the product.

Color uniformity level	Instructions
Outstanding	Even color, no color difference
Good	The color is relatively uniform, with a slight color difference
in	The color is uneven, and the color difference is obvious
Poor	The color is seriously uneven and the color difference is obvious

7. Conclusion

Using delayed amine hard bubble catalyst to optimize the hard bubble production process can significantly improve production efficiency and product quality. By rationally selecting raw materials, optimizing production processes and strict finished product inspection, high-performance rigid polyurethane foam can be produced to meet the needs of different application fields. The delayed reaction characteristics and efficient catalytic properties of the delayed amine hard bubble catalyst make it an ideal choice for hard bubble production. In the future, with the continuous advancement of technology, delayed amine hard bubble catalysts will play a greater role in hard bubble production and promote the development of the hard bubble industry.

Tag: How to optimize the hard bubble production process using delayed amine hard bubble catalyst: from raw material selection to finished product inspection

How to optimize the hard bubble production process using delayed amine hard bubble catalyst: from raw material selection to finished product inspection