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:
Feb. 15, 2011
Filed:
Sep. 13, 2007
Daisuke Yamamoto, Nagoya, JP;
Ken Sudo, Nagoya, JP;
Hajime Takamura, Ichihara, JP;
Taro Yamashita, Ichihara, JP;
Koji Yamauchi, Nagoya, JP;
Hideki Matsumoto, Nagoya, JP;
Kenichi Utazaki, Nagoya, JP;
Daisuke Yamamoto, Nagoya, JP;
Ken Sudo, Nagoya, JP;
Hajime Takamura, Ichihara, JP;
Taro Yamashita, Ichihara, JP;
Koji Yamauchi, Nagoya, JP;
Hideki Matsumoto, Nagoya, JP;
Kenichi Utazaki, Nagoya, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A process for continuously producing a thermoplastic copolymer, in which a copolymer (A) containing unsaturated carboxylic acid alkyl ester units and unsaturated carboxylic acid units is produced and in succession heat-treated to perform intramolecular cyclization reaction by dehydration and/or dealcoholization reaction, for producing a thermoplastic copolymer (B) containing glutaric anhydride units and the unsaturated carboxylic acid alkyl ester units. The obtained copolymer is excellent in heat resistance and colorless transparency and very small in foreign matter content.