Thermosetting catonic acrylic latices and their use in coating compositions
AssigneePPG Industries, Inc.
InventorsDavid A. Welsh, Rostyslaw Dowbenko, Suryya K. Das, Charles M. Kania, Roger M. Christenson
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Abstract
A cationic thermosetting latex, coating compositions prepared therefrom, and the process for providing a protective coating are disclosed. The thermosetting latex comprises a blocked isocyanate curing agent and a cationic acrylic latex which is prepared by copolymerizing ethylenically unsaturated monomers, at least one of which contains an active hydrogen group, in an acidic medium in the presence of a cationic surfactant, of which the gegen-ion is derived from certain phosphorous-containing acids. Such latices, when formulated into coating compositions, provide corrosion-resistant coatings.
Claims5
A stable thermosetting cationic acrylic latex composition, comprising a blocked isocyanate curing agent and a cationic acrylic latex;
- the cationic acrylic latex being prepared by a process which comprises copolymerizing ethylenically unsaturated monomers, at least one of which contains an active hydrogen group, in an acidic medium in the presence of water, a polymerization initiator and a cationic surfactant which has a gegen-ion derived from an acid selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous and alkyl or aryl hydrogen phosphate.
Dependencies are inferred from the claim text.