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:
Apr. 23, 2019
Filed:
Feb. 03, 2016
Toyobo Co., Ltd., Osaka, JP;
Hideto Ohashi, Fukui, JP;
Hideki Shimizu, Fukui, JP;
TOYOBO CO., LTD., Osaka, JP;
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.