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:
Nov. 03, 2015
Filed:
Aug. 24, 2012
Takuro Okubo, Nagoya, JP;
Youichiro Tanaka, Nagoya, JP;
Kunihiro Morimoto, Otsu, JP;
Toray Industries, Inc., , JP;
Abstract
A polyester has excellent thermostability with only a small reduction in intrinsic viscosity during melt molding. The polyester is obtained from a dicarboxylic acid, and/or an ester-forming derivative thereof, and an ethylene glycol, a catalyst selected from the group consisting of a titanium compound, aluminum compound and antimony compound, a phosphorous compound selected from the group consisting of phosphoric acid, trimethyl phosphate, ethyl diethylphosphonoacetate, 3,9-bis(2,6-di-t-butyl-4-methylphenoxy) -2,4,8, 10-tetraoxa-3,9-diphosphaspiro[5,5]undecane and tetrakis(2,4-di-t-butyl-5-methylphenyl) [1,1-biphenyl]-4,4'-diylbisphosphonite, wherein the polyester contains 15 to 203 ppm of a sum of copolymerized 1,2-propanediol and/or uncopolymerized 1,2-propanediol wherein ethylene glycol is obtained from biomass and has content of 1,2-propanediol of 45 to 1000 ppm.