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. 14, 2021
Filed:
Jun. 20, 2018
Teijin Limited, Osaka, JP;
TEIJIN LIMITED, Osaka, JP;
Abstract
The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness. The polycarbonate copolymer of the present invention contains a unit (A) represented by the following formula (1-1) or (1-2) and a unit (B) represented by the following formula (3); wherein in formula (1-1), Rand Rrespectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group, or halogen atom, and Y represents a divalent organic residue comprised of the following formula (2); in formula (2), Crepresents a cycloalkylene group, m represents an integer of 3 to 20, Rrepresents a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms, and n represents an integer of 1 to 10; in formula (1-2), R' and R′ respectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group or a halogen atom, and W represents a single bond, carbon atom, oxygen atom or sulfur atom; and in formula (3), R, R, Rand Rrespectively and independently represent a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms: