The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2022
Filed:
Jul. 08, 2019
SK Chemicals Co., Ltd., Gyeonggi-do, KR;
Min A Park, Gyeonggi-do, KR;
Ji-Hyun Kim, Gyeonggi-do, KR;
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.