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

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] Add 6.0kg of ethylene glycol, 6.0kg of 1,4-butadiene glycol, 24.0kg of hydroxy-terminated polybutadiene liquid rubber (molecular weight 250, functionality 1.9), and 24.0kg of ethylene glycol to the reactor. Diacid and 2.4g titanium catalyst, turn on the stirring, start heating to 140℃, keep constant temperature for 2h, stabilize the dehydration speed (pass through the rectification tower, keep the top temperature at 90℃), continue to raise the temperature to 170℃ and turn on the vacuum pump to control the slow vacuum Slowly increase gradually. The temperature was raised to 215°C for transesterification reaction, and nitrogen was introduced to take away the excess polyols and small molecular alcohols. From the time of vacuuming for 5 hours, samples were taken every 2 hours for central control analysis to the final acid value (0.1~0.6) mgKOH / About g, the hydroxyl value is 112.0mgKOH / g, the normal pressure is restored, the temperature is reduced to room t...

Example Embodiment

[0038] Example 2

[0039] Add 13.8kg of ethylene glycol, 13.8kg of hydroxy-terminated polybutyronitrile liquid rubber (molecular weight 500, functionality 2.4), 32.4kg of adipic acid and 5.6g of titanium catalyst to the reaction kettle, turn on the stirring , When the temperature is raised to 160℃, keep the temperature constant for 2h, stabilize the dehydration speed (pass through the rectification tower, keep the top temperature at 105℃), continue to heat up to 190℃, turn on the vacuum pump, and control the vacuum to gradually increase. The temperature was raised to 235°C for transesterification reaction, and nitrogen gas was introduced to take away the excess polyols and small molecular alcohols. From the time of vacuuming for 5h, samples were taken every 2h for central control analysis to the final acid value (0.1~0.6) mgKOH / g, the hydroxyl value is 56.0mgKOH / g, return to normal pressure, drop to room temperature, and store after discharge to obtain liquid rubber modified pol...

Example Embodiment

[0040] Example 3

[0041] Add 7.4kg of ethylene glycol, 7.4kg of 1,4-butanediol, 14.8kg of hydroxy-terminated polybutyronitrile liquid rubber (molecular weight 500, functionality 2.4), and 30.4kg of hexamethylene to the reactor. Acid and 6.6g titanium catalyst, turn on the stirring, start to heat up to 160℃ and keep the temperature constant for 2h, stabilize the dehydration speed (pass through the rectification tower, keep the top temperature at 105℃), continue to heat up to 190℃, turn on the vacuum pump, control the vacuum slowly Gradually increase. The temperature was raised to 235°C for transesterification reaction, and nitrogen gas was introduced to take away the excess polyols and small molecular alcohols. From the time of vacuuming for 5h, samples were taken every 2h for central control analysis to the final acid value (0.1~0.6) mgKOH / g, the hydroxyl value is 56.0mgKOH / g, return to normal pressure, drop to room temperature, and store after discharge to obtain liquid rubbe...

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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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