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:
Nov. 22, 2016
Filed:
Nov. 15, 2013
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Yoshinori Isahaya, Tokyo, JP;
Atsushi Hirashima, Tokyo, JP;
Hidefumi Harada, Tokyo, JP;
Maki Ito, Tokyo, JP;
Jun-ya Hayakawa, Tokyo, JP;
Takehiko Isobe, Tokyo, JP;
Taichi Tokutake, Nishitokyo, JP;
Yousuke Shinkai, Tokyo, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
Abstract
The invention provides a process for producing a highly polymerized aromatic polycarbonate resin including a molecular weight-increasing step of reacting an aromatic polycarbonate prepolymer with an aliphatic diol compound represented by Formula (g2) in the presence of a transesterification catalyst to obtain a highly polymerized aromatic polycarbonate resin. In the formula, Ra and Rb each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group, a cycloalkyl group, an aryl group or an alkoxy group, or Ra and Rb may be bonded to each other to form a ring; Rto Reach independently represent a hydrogen atom, a halogen atom or an alkyl group; and n represents an integer of 0 to 30.