Search International and National Patent Collections

1. (WO2018062325) COPOLYESTER RESIN

Pub. No.:    WO/2018/062325    International Application No.:    PCT/JP2017/035072
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Thu Sep 28 01:59:59 CEST 2017
IPC: C08G 63/60
Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC.
三菱瓦斯化学株式会社
Inventors: HONDA, Eiichi
本多 栄一
YOSHIMURA, Yasuaki
吉村 康明
NOGUCHI, Keita
野口 敬太
SATAKE, Yuichiro
佐竹 雄一郎
MOTOI, Takashi
元井 隆司
Title: COPOLYESTER RESIN
Abstract:
A copolyester resin having units (A) represented by general formula (1), diol units (B), and derivative units (C) that form a dicarboxylic acid or an ester thereof, wherein the copolyester resin has 10-95 mol% of units (A) among the total units of the copolyester resin and satisfies (1)-(3) below. (1) The glass transition temperature of the copolyester resin is 90°C or higher. (2) The crystallization calorific value on cooling of the copolyester resin is 5 J/g or lower. (3) The absolute value of the photoelastic coefficient of the copolyester resin is 40 × 10-12 Pa-1 or lower. (In general formula (1), R1 is a hydrogen atom, CH3, or C2H5, R2 and R3 each independently are a hydrogen atom or CH3, and n is 0 or 1.)