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:
Jan. 31, 2017
Filed:
Dec. 04, 2014
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Genomatica, Inc., San Diego, CA (US);
Masaru Utsunomiya, Tokyo, JP;
Yusuke Izawa, Mie, JP;
Norikazu Konishi, Mie, JP;
Shinichiro Matsuzono, Mie, JP;
Takayuki Suzuki, Mie, JP;
Michael Japs, San Diego, CA (US);
Mark Burk, San Diego, CA (US);
Warren Clark, Lake Jackson, TX (US);
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
Genomatica, Inc., San Diego, CA (US);
Abstract
The present invention aims to provide a method for producing polybutylene terephthalate (PBT) with an excellent color using biomass-derived 1,4-butanediol (BG). The invention relates to a method for producing PBT comprising a step of subjecting a diol component containing raw material 1,4-BG having a nitrogen content of 0.01 to 50 ppm by mass and a dicarboxylic acid component to esterification or ester-exchange reaction, and a polycondensation reaction step for obtaining PBT from the reactant, wherein the content of gamma butyrolactone in the raw material 1,4-BG is 1 to 100 ppm by mass.