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US 4,542,180 AGranted
Composite low temperature cure latexes
AssigneeSCM Corporation
InventorsGary M. Carlson, Frank A. Wickert
Life of this patent
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Abstract
Improved coating compositions comprise a coreactive polymeric mixture comprising a reactive emulsion polymer produced by copolymerizing ethylenic monomers in the presence of glycoluril dispersed in water to provide an in-situ blend of reactive polymer and glycoluril. Upon heat curing, the glycoluril cross-links with the reactive in-situ formed emulsion polymer.
Claims4
In a process for providing a polymeric composition comprising glycoluril and reactive copolymer the process steps comprising:
- providing an aqueous dispersion of glycoluril derivative dispersed into water, and copolymerizing ethylenically unsaturated monomers in the presence of the aqueous dispersion of glycoluril derivative to provide an in-situ formed emulsion polymer mixture of glycoluril derivative and reactive matrix copolymer of copolymerized monomers, said emulsion polymer mixture containing on a solids weight basis between 5% and 55% glycoluril derivative, and said monomers comprising between 0.5% and 10% carboxyl monomer and between 2% and 20% hydroxyl monomer with the balance being other ethylenically unsaturated monomers including acrylamide monomers.
Dependencies are inferred from the claim text.