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. 14, 1998
Filed:
Jun. 24, 1996
Anbazhagan Natesh, Marshall Township Allegheny County, PA (US);
Shanti Swarup, Hampton Township Allegheny County, PA (US);
Mary Ellen Rosenberger, Bay Village, OH (US);
Mary Eifert, Lakewood, OH (US);
Karl F Schimmel, Verona Borough, PA (US);
John W Burgman, McCandless Township, Allegheny County, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
Aqueous dispersions of urethane polymers and vinyl polymers (e.g., acrylics) are disclosed that provide water-based coating compositions with good adhesion following humidity exposure. The dispersion is predominately urethane, and the polyurethane is made from a first and a second polyisocyanate, the first polyisocyanate having at least one open carbon chain greater than six carbon atoms in length between two isocyanate groups, preferably at least eight carbon atoms in length. The vinyl monomers are polymerized in the presence of the aqueously dispersed polyurethane.