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:
Feb. 14, 1995
Filed:
Feb. 14, 1990
Applicant:
Inventors:
Paul A Westbrook, Houston, TX (US);
Leonard E Gerlowski, Katy, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524288 ; 524293 ; 524296 ; 524299 ; 524505 ;
Abstract
The present invention provides an aromatic acid, a salt of an aromatic acid, anhydride of an aromatic acid, or mixtures thereof in which at least 50 percent of the carbon atoms are in aromatic rings and which have a melting point above about 100.degree. C. as a plasticizer for polyvinyl aromatic polymers which are functionalized by grafting salt functional groups onto the polyvinyl aromatic blocks. When such a polymer is plasticized with the aromatic acid, salt of an aromatic acid or anhydride of an aromatic acid of this invention, the polymer retains excellent high temperature physical properties.