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:
May. 23, 2006
Filed:
Aug. 21, 2003
Yoshihiro Fujimori, Mie, JP;
Kiyotoshi Fujioka, Mie, JP;
Masahiro Nukui, Mie, JP;
Yutaka Yatsugi, Mie, JP;
Kazuya Nakamichi, Mie, JP;
Noboru Satou, Mie, JP;
Toshio Kambe, Mie, JP;
Hirotsugu Niwa, Mie, JP;
Yoshihiro Fujimori, Mie, JP;
Kiyotoshi Fujioka, Mie, JP;
Masahiro Nukui, Mie, JP;
Yutaka Yatsugi, Mie, JP;
Kazuya Nakamichi, Mie, JP;
Noboru Satou, Mie, JP;
Toshio Kambe, Mie, JP;
Hirotsugu Niwa, Mie, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95° C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 μg per 1 g of the polyester resin, as antimony atoms (Sb).