C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/4219
C09D 133/06 (2006.01) C08L 61/20 (2006.01) C08L 63/00 (2006.01)
Patent
CA 1158792
ABSTRACT OF THE DISCLOSURE Water based primer-surfacer compositions for appli- cation in the automotive industry over bare or treated metal and under a top coat of acrylic lacquer or enamel are formu- lated in aqueous medium using a latex of an addition copolymer prepared by emulsion polymerization of a mixture of styrenic and acrylic monomers, with hydroxyl and carboxyl functionality, preferably a mixture of styrene, ethyl acrylate, 2-hydroxy- ethyl methacrylate and acrylic acid. The latex is the pre- dominant film forming ingredient in the composition and is combined with minor amounts of other film forming ingredients including a water soluble epoxy ester, preferably derived from bisphenol A, diglycidyl ether, drying oil fatty acids and maleic anhydride and water soluble or dispersible aminoplast resins, preferably methoxylated melamine formaldehyde resin and butoxylated urea formaldehyde resin. Pigments are also normally present in the composition.
380390
Hight Roland W.
Levine Morris
Yurcheshen Michael
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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