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Preparation of high biomass content polyester polyols with hydrogenated itaconic acid

A technology of polyester polyol and polyol, which is applied in the field of preparing high biomass content polyester polyol, can solve the problem that it is difficult to prepare polyester polyol with required chromaticity and the like

Pending Publication Date: 2021-06-18
COATING P MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, the 2-mSA produced by petrochemical or biomass sources in the prior art has a relatively high content of iron ions. If 2-mSA with a content>30mol% is used in the polyester polyol formulation, It is difficult to produce polyester polyols with chromaticity that meets the requirements (the current industrial polyester polyol chromaticity specification is about 40-100APHA chromaticity or lower)

Method used

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  • Preparation of high biomass content polyester polyols with hydrogenated itaconic acid
  • Preparation of high biomass content polyester polyols with hydrogenated itaconic acid

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preparation example Construction

[0032] Preparation method of polyester polyol with high biomass content

[0033] As mentioned above, the production method of the polyester polyol of the present invention includes reacting 2-methylsuccinic acid with dibasic alcohol and dibasic acid further added as the case may be.

[0034] In a specific example of the present invention, the method for preparing the polyester polyol of high biomass content comprises the following steps at least:

[0035] (1) Add alkyl polyol, alkyl polyacid and antioxidant system to the reactor;

[0036] (2) Carry out the reaction at a temperature not higher than 160°C in a stable gas environment and then increase the reaction temperature to 180-230°C to continue the reaction;

[0037] (3) When the acid value is lower than the first target value, apply a vacuum condition to the reactor and make the reaction continue;

[0038] (4) the reaction is completed when the acid value is lower than the second target value;

[0039] Wherein the alkyl p...

example 1

[0054] 2-methylsuccinic acid (2-mSA): 400g, ethylene glycol (EG): 100g, butanediol (BG): 150g, antioxidant 168: 0.06g, antioxidant 5057: 0.02g, T- 9 Catalyst: 0.08g, add to the reaction vessel, heat to 140°C with nitrogen gas and stir for 1 hour, then heat to 180-230°C to react, when the acid value is lower than 20mg KOH / g, vacuumize to gradually increase the vacuum degree to -720torr And maintain the temperature for 7 hours, the acid value is lower than 1 to stop the reaction.

example 2

[0056] Add 2-methylsuccinic acid: 400g, ethylene glycol: 98g, butanediol: 140g, antioxidant 168: 0.06g, antioxidant 5057: 0.02g, T-9 catalyst: 0.08g, into the reaction vessel, Heat to 140°C with nitrogen gas and stir for 1 hour, then heat to 180-230°C to react, when the acid value is lower than 20mg KOH / g, vacuumize to gradually increase the vacuum degree to -720torr and maintain the temperature for 7 hours, the acid value is lower than 1 stop responding

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Abstract

The invention relates to the preparation of high biomass content polyester polyols with hydrogenated itaconic acid, in particular to high biomass content polyester polyols, especially polyester polyols comprising hydrogenated itaconic acid (namely 2-methylsuccinic acid (2-mSA)). Compared with existing biomass polyester polyol, the high-biomass-content polyester polyol provided by the invention accords with APHA chromaticity specifications and is beneficial to further application. The invention also relates to a method for preparing the high biomass content polyester polyol.

Description

technical field [0001] The present invention relates to high biomass content, especially polyester polyols containing hydrogenated itaconic acid (ie, 2-methylsuccinic acid (2-mSA)). Compared with the existing biomass polyester polyols, the polyester polyols with high biomass content provided by the present invention meet the APHA chromaticity (American Public Health Association chromaticity) specification, and when further applied to the preparation of polyurethane, can obtain Polyurethane with good clarity, softness and high washback elasticity. It also relates to a method for preparing high biomass content polyester polyols. Background technique [0002] Petroleum is the most important energy source in the world, and petrochemical products are everywhere, including small molecular compounds and polymers, such as polyurethane. The polyols required for the preparation of polyurethanes are generally synthesized from dibasic carboxylic acids and dibasic alcohols through shri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/78C08K5/526C08K5/18
CPCC08G63/16C08G63/78C08K5/526C08K5/18
Inventor 林永泰苏琦钧陈俊业
Owner COATING P MATERIALS CO LTD
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