Patent · US Active

Polyester resin and preparation method of the same

US11518848B2 · kind B2 · utility

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5Claims
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Assignee

Inventors

Key dates

Filing dateJul 8, 2019
Grant dateDec 6, 2022
Priority date—
Expiry dateJul 8, 2039

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G63/85
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A polyester resin that exhibits heat resistance and transparency by including at least dispiro[5.1.5.1]tetradecane-7,14-diol as a diol component, and a preparation method of this polyester resin are disclosed. The polyester resin is obtained by copolymerization of two or more glycols in addition to dispiro[5.1.5.1]tetradecane-7,14-diol and dicarboxylic acid component, which may include terephthalic acid. The diol component may include 1,4-cyclohexanedimethanol in a range from 30 to 50 mol % based on 100 mol % of the dicarboxylic acid and dispiro[5.1.5.1]tetradecane-7,14-diol in a range from 5 to 60 mol % based on 100 mol % of the dicarboxylic acid moiety and ethylene glycol.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.