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. 16, 2000
Filed:
Jul. 22, 1998
Applicant:
Inventors:
Guerino G Sacripante, Oakville, CA;
Daniel A Foucher, Toronto, CA;
J Stephen Kittelberger, Rochester, NY (US);
Dongming Li, Fairport, NY (US);
Marko D Saban, Etobicoke, CA;
Alan E Toth, Burlington, CA;
Robert D Bayley, Fairport, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08G / ; C08J / ;
U.S. Cl.
CPC ...
522-6 ; 528190 ; 528193 ; 528194 ; 528195 ; 528219 ; 528275 ; 528298 ; 528302 ; 528303 ; 528306 ; 528307 ; 528308 ; 5283086 ; 524777 ; 524779 ; 524788 ; 430107 ; 430114 ; 522104 ; 522165 ;
Abstract
A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.