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. 20, 2011
Filed:
Nov. 21, 2006
Toyoaki Kurihara, Kamisu, JP;
Kenichi Hamada, Kamisu, JP;
Akiko Ide, Tokyo, JP;
Eiji Iwasa, Osaka, JP;
Tomokazu Ise, Tokyo, JP;
Yoshihiro Morishita, Kamisu, JP;
Hiroshi Oshima, Kamisu, JP;
Toyoaki Kurihara, Kamisu, JP;
Kenichi Hamada, Kamisu, JP;
Akiko Ide, Tokyo, JP;
Eiji Iwasa, Osaka, JP;
Tomokazu Ise, Tokyo, JP;
Yoshihiro Morishita, Kamisu, JP;
Hiroshi Oshima, Kamisu, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A polylactic acid composition comprising (A) a polylactic acid-series resin and (B) an acrylic triblock copolymer is prepared. The composition fulfills the following requirements: (1) the acrylic triblock copolymer (B) is a triblock polymer comprising (B1) a polymer block having a glass-transition temperature of not higher than 25° C., (B2a) a polymer block which has a glass-transition temperature of not lower than 60° C. and is bound to a terminal of the polymer block (B1), and (B2b) a polymer block which has a glass-transition temperature of not lower than 60° C. and is bound to another terminal thereof; (2) the polymer block (B1) comprises a main structural unit derived from an acrylate, and the polymer block (B2a) and the polymer block (B2b) independently comprise a main structural unit derived from a methacrylate; and (3) both of the weight-average molecular weights of the polymer block (B2a) and polymer block (B2b) are smaller than the weight-average molecular weight of the polymer block (B1). The polylactic acid-series resin (A) and the acrylic triblock copolymer (B) may form a phase separation structure.