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:
Apr. 20, 1976
Filed:
Mar. 22, 1974
Applicant:
Inventors:
Assignee:
Toyo Boseki Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08G / ;
U.S. Cl.
CPC ...
260-23 ; 260 / ; 260 / ; 260 / ; 2604 / ; 2604 / ; 2604 / ; 260861 ;
Abstract
A process for producing polyester resins, such as saturated polyester resin, alkyd resin and unsaturated polyester resin from polyester wastes, which comprises depolycondensing polyester wastes with at least one polyol in the presence of at least one titanyl oxalate compound and/or titanium tartrate compound and subsequently polycondensing the resulting depolycondensation product with at least one polycarboxylic acid or its anhydride or with at least one polycarboxylic acid or its anhydride and at least one polyol, optionally in the presence of at least one phosphorus compound.