Novel polyether ester elastomer and preparation method thereof

A polyetherester elastomer and trimer technology, which is applied in the field of elastomer materials, can solve the problems that the resilience performance needs to be improved, the mechanical strength of the elastomer is adversely affected, the reaction time of the polyetherester elastomer is long, and the like, and the preparation is improved. The effect of long time, strong hydrolysis stability and better comprehensive performance

Active Publication Date: 2019-06-25
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical solution improves the resilience of the elastomer, the content of the polyether soft segment is relatively high, which has an adverse effect on the mechanical strength of the elastomer
[0005] How to solve the technical problems such as the long reaction time of polyether ester elastomer and the need to improve the rebound performance is one of the technical difficulties faced in this field

Method used

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  • Novel polyether ester elastomer and preparation method thereof
  • Novel polyether ester elastomer and preparation method thereof
  • Novel polyether ester elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of polyester polyol: Mix 830g of terephthalic acid (PTA), 1080g of butanediol (BDO) and 1.0g of tetrabutyl titanate catalyst and vacuum dehydrate, control the system temperature at 180°C for prepolymerization, and react for 3 hours , raise the temperature to 220°C and lower the pressure slowly to 6KPa, keep the temperature for 2 hours to obtain a polyester polyol with a number average molecular weight of 1000 and an acid value of 0.5mgKOH / g, cool down to about 100°C for use.

[0041] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1): the above-mentioned polyester polyol of 200g, 200g (M n =1000) polytetrahydrofuran (PTMG) and 100 g of diphenylmethane diisocyanate (MDI) were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 2

[0043] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0044] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.03): the above-mentioned polyester polyol of 400g, 400g (M n =2000) polytetrahydrofuran and 103 g of diphenylmethane diisocyanate were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 3

[0046] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0047] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.08): the above-mentioned polyester polyol of 400g, 200g (M n =1000) polytetrahydrofuran and 216g of diphenylmethane diisocyanate were added to the reactor and reacted at 180°C. The reaction time was 50 minutes, and granulation was carried out after the reaction was completed.

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Abstract

The invention provides a novel polyether ester elastomer and a preparation method thereof, wherein the polyether ester elastomer is prepared by carrying out a mixing reaction on the following components by mass: 100 parts of polyester polyol, 25-100 parts of polyether polyol, and 5-55 parts of isocyanate, preferably, 50-100 parts of polyether polyol, preferably 8-28 parts of isocyanate. Accordingto the present invention, the polyether ester elastomer can be prepared through the reaction within a relatively short time, and has good resilience performance.

Description

technical field [0001] The invention relates to the field of elastomer materials, in particular to a novel polyether ester elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyetherester elastomer is a new type of engineering grade elastomer material, which combines the characteristics of thermoplastics and rubber, and has diversified properties, such as good mechanical strength, heat resistance, hydrolysis resistance, UV resistance, chemical resistance It is widely used in automobile industry, electronics industry, electronic appliances, industrial products, sporting goods and shoemaking and other fields. [0003] Most industrial polyether ester elastomers are synthesized from polybutylene terephthalate (PBT) made from terephthalic acid (PTA) or dimethyl terephthalate (DMT) and butanediol (BDO). ) is the hard segment, and polytetrahydrofuran (PTMG) is the soft segment. The preparation process of the polymer usually includes the ester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/42C08G18/48
Inventor 张存玉孙令民黄岐善
Owner WANHUA CHEM GRP CO LTD
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