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US 2026/0286040 A1Published application
Polyester polymer, preparation method of polyester polymer, and molded article comprising the same
AssigneeLG Chem, Ltd.
InventorsYeonju LEE, Dongcheol CHOE, Chul Woong KIM, Suhyun CHO, Kyeongmin KIM, Donggyun KANG
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Abstract
The present disclosure relates to a polyester polymer with high bio-based content and molecular weight as well as excellent optical properties, a preparation method of the polyester polymer and a molded article comprising the same.
Claims19
A polyester polymer comprising a repeating unit represented by the following Chemical Formula 1,
- wherein the polyester polymer has a biomass content of at least 40% as measured according to ASTM D6866-22, and
- is decomposed by at least 20 wt. % based on a weight of an initial polymer when exposed to an outside environment at room temperature for at least:
- wherein in Chemical Formula 1,
- L1 is an alkylene group having 3 carbon atoms, and
- L2 is an alkylene group having 1 to 10 carbon atoms.
2 more elements
A preparation method of a polyester polymer, comprising the steps of:
- adding a diol compound having 3 carbon atoms and a dicarboxylic acid compound and reacting them at a temperature of 50° C. or more and 200° C. or less under a pressure of 10 torr or more and 760 torr or less to prepare an oligomer;
- and
- reacting the oligomer at a temperature of 50° C. or more and 200° C. or less under a pressure of 1 torr or less to prepare the polyester polymer.
Dependencies are inferred from the claim text.