Polyester resin

Patent metadata

Field	Value
Publication number	US-10889684-B2
Application number	US-201615758592-A
Country	US
Kind code	B2
Filing date	Sep 12, 2016
Priority date	Sep 18, 2015
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A polyester resin having a diol constitutional unit and a dicarboxylic acid constitutional unit, wherein 20 to 100 mol % of the diol constitutional unit is a constitutional unit derived from a diol having a dinorbornane ring; a glass transition temperature of the polyester resin is 90° C. or higher; an amount of heat of a crystallization exothermic peak in temperature drop of the polyester resin is 5 J/g or less; and a yellow index (YI) value as measured by a reflection method according to JIS K 7103 is 10 or less.

First claim

The invention claimed is:

1. A polyester resin comprising a diol constitutional unit and a dicarboxylic acid constitutional unit, wherein:
74 to 100 mol % of the diol constitutional unit is a constitutional unit derived from a diol having a dinorbornane ring represented by the following formula (i);
a glass transition temperature is 90° C. or higher;
an amount of heat of a crystallization exothermic peak in temperature drop is less than 1 J/g; and
a yellow index (YI) value as measured by a reflection method according to JIS K 7103 is 10 or less:

wherein R is H, CH 3 , or C 2 H 5 ,
wherein the polyester resin further comprises at least one of phosphoric acid, phosphorous acid, phosphoric acid esters, and phosphorous acid esters.

2. The polyester resin according to claim 1 , wherein the dicarboxylic acid constitutional unit is a constitutional unit derived from at least one selected from terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid.

3. The polyester resin according to claim 1 , comprising a constitutional unit derived from 2,6-naphthalenedicarboxylic acid as the dicarboxylic acid constitutional unit, wherein
the glass transition temperature is 130° C. or higher.

4. The polyester resin according to claim 1 , comprising a constitutional unit derived from ethylene glycol as a diol constitutional unit other than the diol having a dinorbornane ring represented by formula (i).

5. The polyester resin according to claim 1 , further comprising at least one of a unit derived from a monoalcohol, a unit derived from a polyhydric alcohol having 3 or more hydroxyl groups, a unit derived from a monocarboxylic acid, a unit derived from a polycarboxylic acid having 3 or more carboxyl groups, and a unit derived from an oxyacid.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Satake Yuichiro
• Yoshimura Yasuaki
• Honda Eiichi
• Motoi Takashi
• Kitamura Mitsuharu

Classifications

• G02B1/04 Primary

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• C08G63/199 Primary

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title

• C08G63/189

  containing a naphthalene ring · CPC title

• C08G63/183

  Terephthalic acids · CPC title

• C08L67/00

  Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers · CPC title