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:
Oct. 13, 2020
Filed:
Dec. 27, 2016
Teijin Limited, Osaka, JP;
Tetsuya Motoyoshi, Osaka, JP;
Katsuhiro Yamanaka, Osaka, JP;
TEIJIN LIMITED, Osaka, JP;
Abstract
To provide a polycarbonate resin having an excellent hue and high heat stability, and a production method and a film thereof. The polycarbonate resin has a carbonate constituent unit represented by the following formula (A), wherein the resin contains a terminal group represented by the following formula (1) or (2) and 0.1 to 500 ppm of an aromatic monohydroxy compound. (In the formula (1), Ris an alkyl group having 6 to 15 carbon atoms which may be substituted.) (In the formula (2), Rand Rare each independently an alkylene group having 1 to 12 carbon atoms which may be substituted. Ris a hydrogen atom or alkyl group having 1 to 12 carbon atoms which may be substituted. n is an integer of 1 to 20.)