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US 2025/0059320 A1Published application
Semi-aromatic polyester, and preparation method therefor and use thereof
AssigneesZhuhai Wango Chemical Co., Ltd., Kingfa Sci. & Tech. Co., Ltd.
InventorsChuanhui ZHANG, Pingxu CHEN, Nanbiao YE, Chunping OUYANG, Kaijin MAI, Xueteng DONG, Xiangbin ZENG, Changli LU, Tongmin CAI
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Abstract
Disclosed are a semi-aromatic polyester, and a preparation method therefor and a use thereof. In the present invention, on the basis of the total molar amount of diacid, the molar content of a repeating unit —CH2CH2CH2CH2—O— in dimer(1,4-butanediol) is controlled to be 0.05-0.35 mol %, which can effectively improve the resin color of the semi-aromatic polyester.
Claims11
A semi-aromatic polyester, comprising repeating units derived from the following components:
- a first component A, based on a total molar weight of the first component A, comprising:
- a component a1) 35-65 mol %, and preferably 40-60 mol % of at least one aliphatic dicarboxylic acid, or an ester derivative thereof or an anhydride derivative thereof,
- a component a2) 35-65 mol %, and preferably 40-60 mol % of at least one aromatic dicarboxylic acid, or an ester derivative thereof or an anhydride derivative thereof,
- a second component B:
- 1,4-butanediol;
- and
- a third component C:
- dimer(1,4-butanediol) having a molecular formula of HO—CH2CH2CH2CH2—O—CH2CH2CH2CH2—OH, wherein based on the total molar weight of the first component A, a molar content of a repeating unit —CH2CH2CH2CH2—O— in the third component C is 0.05-0.35 mol %.
5 more elements
Dependencies are inferred from the claim text.