公开(公告)号：US20180265627A1

公开(公告)日：2018-09-20

申请号：US15544365

申请日：2016-02-03

Applicant: TOYOBO CO., LTD.

Inventor： Hideto OHASHI ,  Hideki SHIMIZU

IPC: C08G63/183 ,  C08G63/84 ,  C09J167/02

CPC classification number: C08G63/183 ,  C08G63/16 ,  C08G63/84 ,  C09J167/02

Abstract: The present invention provides a copolymerized polyester resin which can produce an adhesive resin having an excellent color tone and an excellent durability when used for an adhesive to be applied to various uses. A copolymerized polyester resin, comprising, as constituting ingredients, a dicarboxylic acid ingredient containing 75 molar % or less of terephthalic acid and a diol ingredient containing two or more kinds of diols, characterized in that the copolymerized polyester resin satisfies the following (1) and (2): (1) A decrease in a reduced viscosity after the copolymerized polyester resin is subjected to a heat treatment in a nitrogen atmosphere at 275° C. for 2 hours is 0.20 dl/g or less; and (2) A color b value is 5 or less.