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:
Jan. 10, 1995
Filed:
Jul. 13, 1993
Applicant:
Inventor:
Timothy P Pepper, Dublin, OH (US);
Assignee:
Ashland Oil, Inc., Russell, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08L / ;
U.S. Cl.
CPC ...
525 48 ; 528272 ; 528298 ; 528300 ; 528306 ; 528307 ; 528308 ; 528392 ; 528486 ; 528495 ; 528503 ; 525 10 ; 525 39 ; 525 40 ; 525437 ; 525445 ; 521 40 ; 521 425 ; 521 44 ; 521 485 ;
Abstract
This invention is a low cost styrene-soluble unsaturated polyester resin made using recycled or virgin polyethylene terephthalate. The PET is first glycolyzed using inexpensive glycols and then reacted with maleic anhydride and dicyclopentadiene, forming polyesters containing cyclopentadiene added by Diels-Alder reaction and/or norbornyl-terminated polyesters.