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:
Mar. 13, 2012
Filed:
Jan. 22, 2008
Hiroyuki Sato, Iwaki, JP;
Kazuyuki Yamane, Iwaki, JP;
Yuki Hokari, Nagoya, JP;
Fuminori Kobayashi, Iwaki, JP;
Toshihiko Ono, Iwaki, JP;
Hiroyuki Sato, Iwaki, JP;
Kazuyuki Yamane, Iwaki, JP;
Yuki Hokari, Nagoya, JP;
Fuminori Kobayashi, Iwaki, JP;
Toshihiko Ono, Iwaki, JP;
Kureha Corporation, Tokyo, JP;
Abstract
An aromatic polyester resin composition, comprising: a melt-kneaded product of 99-70 weight parts of an aromatic polyester resin and 1-30 wt. parts (providing a total of 100 wt. parts together with the aromatic polyester resin) of a polyglycolic acid resin, wherein the composition is characterized by a transesterification rate C(%) of 20-60% determined by formula (1) below based on a peak integration ratio of methylene group in polyglycolic acid appearing at σ4.87 ppm with reference to tetramethylsilane according toH-NMR measurement:(%)=(1−()/())×100  (1),wherein I (A): a peak integration ratio of the methylene group of the polyglycolic acid main chain with respect to the alkylene group of the aromatic polyester main chain calculated from the components weight ratio; and I (B): a peak integration ratio of the methylene group of polyglycolic acid main chain to the alkylene group of the aromatic polyester main chain in the resin composition. As a result, the aromatic polyester resin composition obtained by adding a relatively small amount of polyglycolic acid resin is provided with a good harmony of gas-barrier property and transparency.