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. 27, 2007
Filed:
Feb. 13, 2003
Hideshi Hori, Yamaguchi, JP;
Fujito Ehara, Yamaguchi, JP;
Shouji Hiraoka, Yamaguchi, JP;
Ken Maeda, Sodegaura, JP;
Tomohiro Suzuki, Yamaguchi, JP;
Nobumasa Mukai, Yamaguchi, JP;
Hideshi Hori, Yamaguchi, JP;
Fujito Ehara, Yamaguchi, JP;
Shouji Hiraoka, Yamaguchi, JP;
Ken Maeda, Sodegaura, JP;
Tomohiro Suzuki, Yamaguchi, JP;
Nobumasa Mukai, Yamaguchi, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The object of the present invention is to provide a high quality polyester resin having high productivity, stability and safety, a catalyst for polyester production with high catalytic activity, a method for producing the polyester resin with the catalyst, a polyester resin obtained with the catalyst, and a hollow molded container having the polyester resin. The polyester resin of the present invention satisfies specific parameters regarding polymerizability, stability, and metal content. The catalyst for polyester production satisfies specific parameters. The catalyst particularly preferably has: (a) a solid titanium-containing compound which has a maximum solubility in ethylene glycol of 1,000 ppm or more in terms of converted titanium amount when dissolved in ethylene glycol with heating at 150° C., and which has titanium, oxygen, carbon, and hydrogen, and optionally an alkali metal, and has a Ti—O—C bond; and (b) an alkali metal compound, the molar ratio of the alkali metal atoms to the titanium atom in the catalyst being in the range of 20/1 to 0.1/1.