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High-resilience polyurethane elastomer compound

A technology of polyurethane elastomer and polyurethane elasticity, which is applied in the field of chemical synthesis and can solve problems such as difficulty, high cost, and limitation of wide application

Active Publication Date: 2012-07-04
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Products with good rebound performance have fast start-up speed and relatively good wear resistance during use. They are favored by people during use. If you want to get high rebound products, you usually use imported polytetrahydrofuran ether glycol (PTMG) It can be obtained by reacting with toluene diisocyanate, but the price of polytetrahydrofuran ether glycol (PTMG) is more than twice that of ordinary polyether polyols, and the high cost limits its wide application
Products made of ordinary polyether polyol (PPG) have good low temperature performance and good resilience performance, but it is not easy to achieve high resilience products

Method used

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  • High-resilience polyurethane elastomer compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepolymer: polyether polyol (PPG2000) 54.5%, polyether polyol (PPG400) 14.3%, 1,4-butanediol (BDO) 2.0%, toluene diisocyanate (TDI-100) 29.2%, at 80 ℃ ℃ for 3 hours, vacuum (-0.095MPa) to remove air bubbles, to obtain a prepolymer with an isocyanate content of 7.0%;

[0017] Curing agent: 3,3'-dichloro-4,4'-diaminodiphenylmethane;

[0018] Curing agent and prepolymer with NH 2 / NCO=0.9 equivalence ratio for mixing reaction, quickly poured into the preheated mold, wherein, the mixing temperature is 80 ° C, the mold temperature is 120 ° C, demoulding in 40 minutes, adjusted to 110 ° C and vulcanized for 10 hours, A polyurethane elastomer product with a hardness of 98A and a rebound of 41% was obtained.

Embodiment 2

[0020] Prepolymer: 30.5% polyether polyol (PPG1000) with a molecular weight of 1000, 43.5% polyether polyol (PPG4000) with a molecular weight of 4000, 2.7% diethylene glycol (DEG), toluene diisocyanate (TDI-80) 13.3%, toluene diisocyanate (TDI-100) 10.0%, react at 90°C for 2 hours, vacuum (-0.095MPa) to remove air bubbles, and obtain a prepolymer with an isocyanate content of 5.5%;

[0021] Curing agent: 3,3'-dichloro-4,4'-diaminodiphenylmethane;

[0022] Curing agent and prepolymer with NH 2 / NCO=0.9 equivalence ratio for mixing reaction, quickly poured into the preheated mold, wherein, the mixing temperature is 80 ° C, the mold temperature is 120 ° C, demoulding in 40 minutes, adjusted to 110 ° C and vulcanized for 10 hours, A polyurethane elastomer product with a hardness of 91A and a rebound of 45% was obtained.

Embodiment 3

[0024] Prepolymer: polyether polyol (PPG3000) with a molecular weight of 3000 (PPG3000) 65.2%, polyether polyol (PPG400) with a molecular weight of 400 (PPG400) 10.6%, diphenylmethane diisocyanate (MDI-50) 24.2%, react at 70°C for 3 Hour, vacuum (-0.095MPa) removes air bubbles, obtains the prepolymer that isocyanate content is 4%;

[0025] Curing agent: 3,3'-dichloro-4,4'-diaminodiphenylmethane;

[0026] Curing agent and prepolymer with NH 2 / NCO=0.9 equivalence ratio for mixing reaction, quickly poured into the preheated mold, wherein, the mixing temperature is 80 ° C, the mold temperature is 120 ° C, demoulding in 40 minutes, adjusted to 110 ° C and vulcanized for 10 hours, A polyurethane elastomer product with a hardness of 83A and a rebound of 47% was obtained.

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Abstract

The invention belongs to the field of chemical synthesis and particularly relates to a high-resilience polyurethane elastomer compound which is composed of two components including a prepolymer and a curing agent. Diisocyanate, polyether polyol and low-molecular-weight dihydric alcohol react with each other at 70 DEG C to 90 DEG C through polyether polyol to obtain the prepolymer with content of isocyanato ranging from 4.0% to 7.0%. 3,3'-dichloro-4,4'-diaminodiphenyl-methane is adopted as the curing agent. After mixed, the two components undergo vulcanization at the die temperature of 100-120 DEG C to obtain a high-resilience polyurethane elastomer product which is good in mechanical property and resilience. The high-resilience polyurethane elastomer compound has the advantage that ordinary polyether polyol is adopted to produce the high-resilience polyurethane elastomer compound. The polyether polyol with large molecular weight and the polyether polyol with small molecular weight are matched to be used, spaces among the molecules are increased appropriately, and the polyurethane elastomer product with the resilience larger than 40% is obtained.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a high resilience polyurethane elastomer composition. Background technique [0002] Polyurethane elastomer is a polymer synthetic material between plastic and rubber. It has excellent wear resistance, good mechanical strength, oil resistance, low temperature resistance, ozone aging resistance and other properties, so it is widely used in rubber rollers and oil seals. , Automobile tires and other fields. Polyurethane has penetrated into the national economy and people's life, and has become a rapidly developing synthetic material. Products with good rebound performance have fast start-up speed and relatively good wear resistance during use. They are favored by people during use. If you want to get high rebound products, you usually use imported polytetrahydrofuran ether glycol (PTMG) It can be obtained by reacting with toluene diisocyanate, but the price of polytetr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/38C08G18/12
Inventor 陈海良刘兆阳陈伟
Owner SHANDONG INOV POLYURETHANE
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