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. 07, 2006
Filed:
Sep. 10, 2001
Takahiro Nakajima, Ohtsu, JP;
Kenichi Tsukamoto, Ohtsu, JP;
Shoichi Gyobu, Ohtsu, JP;
Fumikazu Yoshida, Ohtsu, JP;
Maki Sato, Ohtsu, JP;
Naoki Watanabe, Ohtsu, JP;
Katsuhiko Kageyama, Ohtsu, JP;
Mitsuyoshi Kuwata, Ohtsu, JP;
Nobuo Moriyama, Ohtsu, JP;
Haruo Matsumoto, Tsuruga, JP;
Yoshitomo Ikehata, Tsuruga, JP;
Yoshinao Matsui, Ohtsu, JP;
Masaou Matsuda, Ohtsu, JP;
Munekazu Okuhara, Iwakuni, JP;
Hiroki Fukuda, Iwakuni, JP;
Takahiro Nakajima, Ohtsu, JP;
Kenichi Tsukamoto, Ohtsu, JP;
Shoichi Gyobu, Ohtsu, JP;
Fumikazu Yoshida, Ohtsu, JP;
Maki Sato, Ohtsu, JP;
Naoki Watanabe, Ohtsu, JP;
Katsuhiko Kageyama, Ohtsu, JP;
Mitsuyoshi Kuwata, Ohtsu, JP;
Nobuo Moriyama, Ohtsu, JP;
Haruo Matsumoto, Tsuruga, JP;
Yoshitomo Ikehata, Tsuruga, JP;
Yoshinao Matsui, Ohtsu, JP;
Masaou Matsuda, Ohtsu, JP;
Munekazu Okuhara, Iwakuni, JP;
Hiroki Fukuda, Iwakuni, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
A polymerization catalyst for polyester production which contains neither a germanium compound nor an antimony compound as a major component. It contains aluminum as the main metallic ingredient, has excellent catalytic activity, and gives a polyester which is effectively inhibited from suffering thermal degradation, during melt molding, without deactivating or removing the catalyst, and is excellent in thermal stability, stability to thermal oxidation, and hydrolytic resistance. The polymerization catalyst contains as a first metallic ingredient at least one member selected among aluminum and compounds thereof and further contains a phosphorus compound represented by a specific chemical formula. The polyester produced with this catalyst is usable as fibers, films, sheets, various moldings including hollow moldings, etc.