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:
Mar. 28, 2023
Filed:
Dec. 11, 2018
Applicant:
Sakai Chemical Industry Co., Ltd., Osaka, JP;
Inventors:
Yuhei Soga, Osaka, JP;
Akihiro Kamon, Osaka, JP;
Assignee:
SAKAI CHEMICAL INDUSTRY CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 27/18 (2006.01); B01J 21/06 (2006.01); C08G 63/85 (2006.01); C08L 67/02 (2006.01);
U.S. Cl.
CPC ...
B01J 27/1806 (2013.01); B01J 21/063 (2013.01); C08G 63/85 (2013.01); C08L 67/02 (2013.01);
Abstract
The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction of a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a water-insoluble or hardly water-soluble phosphate having on the surfaces a coating layer of titanic acid in an amount, of 0.1 to 100 parts by weight in terms of TiOper 100 parts by weight of the phosphate.