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:
Sep. 28, 2021
Filed:
Nov. 21, 2016
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Takanori Miyabe, Kanagawa, JP;
Nobuhiko Matsumoto, Kanagawa, JP;
Takafumi Oda, Kanagawa, JP;
Tomonori Kato, Kanagawa, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
Provided is a polyester-based resin composition capable of giving a molded article excellent in transparency and gas-barrier property even though the molded article requires stretching treatment, and also provided is a method for producing the composition. The method for producing a polyester-based resin composition includes a step of obtaining a master batch (M) containing a polyester resin (A) having a cyclic acetal structure or an alicyclic hydrocarbon structure, and a polyamide resin (B), and a step of melt-kneading the master batch (M) with a polyester resin (R) in which 70 mol % or more of the dicarboxylic acid unit is derived from an aromatic dicarboxylic acid and 70 mol % or more of the diol unit is derived from an aliphatic diol, thereby giving a polyester-based resin composition, in this order,. The glass transition temperature of the polyester resin (A) is 105° C. or lower, the content of the polyester resin (A) in the polyester-based resin composition is 0.5 to 15.0% by mass, and the content of the polyamide resin (B) is 0.5 to 10.0% by mass.