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Hydroxyl-terminated liquid rubber modified polyester polyol as well as preparation method and application thereof

A technology of liquid rubber and modified polyester, which is applied in the field of hydroxyl-terminated liquid rubber-modified polyester polyol and its preparation and application. It can solve the problems of peeling of polyurethane shoe soles, low primary hydroxyl content, and low primary hydroxyl. Achieve the effect of improving low temperature folding resistance, excellent low temperature resistance and good compatibility

Inactive Publication Date: 2018-07-06
ZHEJIANG HUAFON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polybutadiene diol is different from ordinary small molecule polyols, and its primary hydroxyl group is not too high. It is difficult to react a single polybutadiene diol with a dibasic acid. At the same time, the polysebacic acid- The primary hydroxyl content of polybutadiene glycol ester polyol is not high, resulting in low follow-up reactivity, and polysebacic acid-polybutadiene glycol ester polyol and polyethylene glycol-1,4 butanediol The compatibility of adipate polyols is not good, and the subsequent production of polyurethane soles is prone to peeling

Method used

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  • Hydroxyl-terminated liquid rubber modified polyester polyol as well as preparation method and application thereof
  • Hydroxyl-terminated liquid rubber modified polyester polyol as well as preparation method and application thereof
  • Hydroxyl-terminated liquid rubber modified polyester polyol as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the reactor, add successively 6.0kg of ethylene glycol, 6.0kg of 1,4-butanediol, 24.0kg of hydroxyl-terminated polybutadiene liquid rubber (molecular weight is 250, functionality is 1.9), 24.0kg of hexane Diacid and 2.4g titanium catalyst, turn on the stirring, start to heat up to 140°C, keep the temperature for 2 hours, stabilize the dehydration speed (through the rectification tower, the top temperature of the tower is kept at 90°C), continue to heat up to 170°C, turn on the vacuum pump, and control the vacuum degree slowly Slowly and gradually increase. Raise the temperature to 215°C for the transesterification reaction, and pass through nitrogen to take away the excess polyols and small molecule alcohols. After 5 hours from the start of vacuuming, take a sample every 2 hours for central control analysis until the final acid value is (0.1-0.6) mgKOH / About g, the hydroxyl value is 112.0mgKOH / g, return to normal pressure, drop to room temperature, discharge and sto...

Embodiment 2

[0039] In the reactor, add 13.8kg of ethylene glycol, 13.8kg of hydroxyl-terminated polyacrylonitrile liquid rubber (molecular weight is 500, functionality is 2.4), 32.4kg of adipic acid and 5.6g of titanium catalyst, turn on the stirring , start to heat up to 160 ° C, keep the temperature for 2 hours, stabilize the dehydration rate (through the rectification tower, the top temperature is maintained at 105 ° C), continue to heat up to 190 ° C, turn on the vacuum pump, and control the vacuum degree to gradually increase. Raise the temperature to 235°C for the transesterification reaction, and pass through nitrogen to take away the excess polyols and small molecule alcohols. After 5 hours from the start of vacuuming, take a sample every 2 hours for central control analysis until the final acid value is (0.1-0.6) mgKOH / g, the hydroxyl value is 56.0 mgKOH / g, return to normal pressure, cool down to room temperature, discharge and store to obtain liquid rubber modified polyester pol...

Embodiment 3

[0041] In the reactor, add successively 7.4kg of ethylene glycol, 7.4kg of 1,4-butanediol, 14.8kg of hydroxyl-terminated polyacrylonitrile liquid rubber (molecular weight is 500, functionality is 2.4), 30.4kg of adiponitrile acid and 6.6g of titanium catalyst, turn on the stirring, start to heat up to 160°C, keep the temperature for 2 hours, stabilize the dehydration rate (through the rectification tower, the top temperature is maintained at 105°C), continue to heat up to 190°C, turn on the vacuum pump, control the vacuum degree slowly Gradually increase. Raise the temperature to 235°C for the transesterification reaction, and pass through nitrogen to take away the excess polyols and small molecule alcohols. After 5 hours from the start of vacuuming, take a sample every 2 hours for central control analysis until the final acid value is (0.1-0.6) mgKOH / g, the hydroxyl value is 56.0 mgKOH / g, return to normal pressure, cool down to room temperature, discharge and store to obtain...

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Abstract

The invention discloses hydroxyl-terminated liquid rubber modified polyester polyol as well as a preparation method and application thereof. The hydroxyl-terminated liquid rubber modified polyester polyol is an esterification and polycondensation reaction product of hydroxyl-terminated liquid rubber, micromolecular diol and adipic acid; and the hydroxyl value of the hydroxyl-terminated liquid rubber modified aromatic polyester polyol is 14.0 to 112.0 mgKOH / g. When the hydroxyl-terminated liquid rubber modified polyester polyol is applied to preparation of polyurethane elastomer primary liquid,the low-temperature resistance, hydrolysis resistance and wear resistance of the polyurethane elastomer are improved and the hardness under the environment of low temperature is increased less.

Description

technical field [0001] The invention relates to a modified polyester polyol and its preparation method and application. Background technique [0002] Polyurethane microcellular elastomer refers to the density between 0.25 ~ 0.9g / cm 3 The micro-foamed polyurethane material is easy to process and has many advantages such as light weight, good elasticity, wear resistance, folding resistance, and oil resistance. It can be used as shoe parts, sole materials, load-bearing tires, and automobile cushioning materials. important role in national economic life. However, polyurethane elastomers are not perfect, and it is often necessary to add additives or modified materials to improve certain aspects of performance and expand application fields. The Chinese patent application with application number 201510481696.9 uses hydroxyl-terminated polybutadiene instead of polyester polyol or polyether polyol as the soft segment of the polyurethane molecular chain to improve the low-temperatur...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/91C08G18/79C08G18/76C08G18/66C08G18/42C08G18/32C08J9/14C08G101/00
CPCC08G18/3206C08G18/4238C08G18/664C08G18/7671C08G18/797C08G63/16C08G63/916C08J9/144C08J9/146C08J2203/142
Inventor 林孝杰赵叶宝林剑汪忠敏章海飞吴美玲
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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