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Synthetic method of heat-resistant polyurethane elastomer

A technology of polyurethane elastomer and synthesis method, which is applied in the field of polyurethane elastomer, can solve the problems of accelerated aging and performance degradation of polyurethane, and achieve the effect of high performance retention rate and excellent mechanical properties

Active Publication Date: 2017-09-29
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of hardness adjustment, which has both the elasticity of rubber and the hardness of plastic. However, ordinary polyurethane materials tend to accelerate the aging of polyurethane at high temperatures. , the performance is significantly reduced

Method used

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  • Synthetic method of heat-resistant polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Synthesis of polyester polyol: adipic acid: 66.2wt%, ethylene glycol: 32.4wt%, trimethylolpropane: 1.4wt%, plus catalyst tetrabutyl titanate 50ppm synthetic molecular weight is 1500 polyester polyol A .

[0021] The specific steps are: add adipic acid, ethylene glycol, trimethylolpropane and tetrabutyl titanate into the reaction kettle for heating, and protect it with nitrogen gas. When the temperature rises to 140°C, water will be reacted, and the reflux tower will be controlled. The top temperature is 100-102°C, then slowly increase the temperature of the kettle to 160-180°C, keep it warm for 2-3 hours, then raise the temperature to 220-230°C, when the water is finished, keep it warm for 2-3 hours, and then use nitrogen The bubbling process removes the moisture produced by polycondensation. When the acid value of the material in the kettle is less than 0.4mgKOH / g and the moisture content is below 0.05%, the product is qualified, and the material is cooled and discharg...

Embodiment 2

[0024] According to the preparation method of embodiment 1.

[0025] Synthesis of polyester polyol: adipic acid: 58wt%, butanediol: 40.5wt%, trimethylolpropane: 1.5wt%, plus catalyst tetrabutyl titanate 50ppm to synthesize polyester polyol B with a molecular weight of 2000.

[0026] Synthesis of heat-resistant polyurethane elastomer: In terms of weight percentage, take polyester polyol B: 85.1%, TDI‐80: 14.9%, react at 80°C for 3 hours, remove air bubbles in vacuum, take samples to detect isocyanate content, and detect‐NCO The content is 3.6%, and the polyurethane prepolymer is obtained, and the ratio of the polyurethane prepolymer and MOCA is 100:10.3, and the polyurethane elastomer product with a hardness of Shore 85A is obtained by conventional methods.

Embodiment 3

[0028] Polyester polyol adopts the preparation method of embodiment 2 to prepare polyester polyol B.

[0029] Synthesis of heat-resistant polyurethane elastomer: In terms of weight percentage, take polyester polyol B: 69.1%, MDI-100: 30.9%, react at 80°C for 3 hours, remove air bubbles in vacuum, take samples to detect isocyanate content, and detect-NCO The content is 7.5%, and the polyurethane prepolymer is obtained, and the ratio of the polyurethane prepolymer and butanediol is 100:7.6, and the polyurethane elastomer product with a hardness of Shore 90A is obtained by conventional methods.

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Abstract

The invention relates to a synthetic method of a heat-resisting polyurethane elastomer. The heat-resisting polyurethane elastomer is prepared from polyester polyol, diisocyanate and a chain extender by means of reaction; the polyester polyol is generated by reaction of adipic acid and polyol; and the polyol is two or a mixture of more than two of glycol, butanediol, trimethylolpropane, propylene glycol and diethylene glycol. The heat-resisting polyurethane elastomer product prepared by the method disclosed by the invention is excellent in mechanical properties, relatively high in property retention rate at a relatively high temperature, relatively small in permanent compressive deformation and applicable to a place at a high environmental temperature.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, in particular to a method for synthesizing heat-resistant polyurethane elastomers. Background technique [0002] Polyurethane is a polymer synthetic material with performance between rubber and plastic. It is characterized by a wide range of hardness adjustment, which has both the elasticity of rubber and the hardness of plastic. However, ordinary polyurethane materials tend to accelerate the aging of polyurethane at high temperatures. , performance is significantly degraded. Contents of the invention [0003] The purpose of the present invention is to provide a synthetic method of heat-resistant polyurethane elastomer, the obtained elastomer has excellent mechanical properties, and at a higher temperature, the performance retention rate is higher, and the polyurethane elastomer product with less permanent compression deformation, Suitable for places with high ambient temperature. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/10C08G63/20
CPCC08G18/10C08G18/3206C08G18/3814C08G18/4241C08G18/664C08G18/6651C08G18/7614C08G18/7621C08G18/7671C08G63/20
Inventor 刘兆阳陈由亮宿金明
Owner SHANDONG INOV POLYURETHANE
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