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. 13, 2011
Filed:
May. 14, 2008
Akimichi Oda, Iwakuni, JP;
Eiichi Kitazono, Iwakuni, JP;
Toshiyuki Miyake, Chiyoda-ku, JP;
Masami Kinoshita, Chiyoda-ku, JP;
Mizuho Saito, Chiyoda-ku, JP;
Akimichi Oda, Iwakuni, JP;
Eiichi Kitazono, Iwakuni, JP;
Toshiyuki Miyake, Chiyoda-ku, JP;
Masami Kinoshita, Chiyoda-ku, JP;
Mizuho Saito, Chiyoda-ku, JP;
Teijin Limited, Osaka, JP;
Abstract
A process for production of a plant-derived component-containing polycarbonate represented by the following formula (3): (wherein R-Reach independently represent a group selected from among hydrogen, alkyl, cycloalkyl and aryl, and n is the number of repeating units), by melt polycondensation using as the starting materials a specified diol, having a total content of Na, Fe and Ca of no greater than 2 ppm and a purity analysis value of at least 99.7% by gas chromatography, and a specified carbonic acid diester, having a total content of Na, Fe and Ca of no greater than 2 ppm and a purity analysis value of at least 99.7% by gas chromatography.