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. 31, 1988
Filed:
Jul. 21, 1986
Suryya K Das, Pittsburgh, PA (US);
Rostyslaw Dowbenko, Gibsonia, PA (US);
Samuel Porter, Natrona Heights, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
A liquid, hydroxyl functional graft copolymer is prepared by the vinyl addition polymerization, in an inert organic medium, of a vinyl monomer component comprising at least a portion of a carboxyl functional vinyl monomer in the presence of a glycidyl ester containing acrylic polymer, the grafting occuring by the condensation reaction between the carboxyl groups of the vinyl monomer component and the epoxy groups of the glycidyl ester containing acrylic polymer. The graft copolymer is especially useful in formulating clear coating compositions which exhibit excellent sag resistance without the necessity for externally added rheology control agent.