Odor free, air dry, aqueous emulsion paints
AssigneeThe Glidden Company
InventorsF. Louis Floyd, Gary P. Craun
Life of this patent
Estimating the term…
Abstract
An aqueous ambient dry paint coating based on vinyl acetate matrix polymer containing an oligomer selected from a polyurethane or a polyester having a Tg below -20.degree. C. and a number average molecular weight between 200 and 20,000, where the coating is free of organic coalescing solvents. The matrix polymer is produced by mixing the oligomer with the vinyl acetate monomer and other ethylenic monomers, if any, to form an organic mixture of monomer and oligomer, providing an aqueous micro dispersion of the organic mixture phase droplet size less than 5 microns, and copolymerizing the monomer to produce a vinyl acetate polymer containing oligomer, where the polymeric system is free of coalescing organic solvent.
Claims20
An aqueous air-dry paint coating composition containing an emulsion polymerized polymeric binder free of organic coalescing solvent, the polymeric binder comprising:
- a vinyl acetate polymer comprising polymerized vinyl acetate monomer containing an oligomer having a number average molecular weight between about 200 and 20,000 and a Tg below about -20.degree. C., the oligomer selected from a polyurethane and a polyester, the polymeric binder containing between about 3% and 50% by weight of said oligomer to provide a polymeric binder having a Tg less than 20.degree. C., where said polymeric binder is produced by mixing the oligomer in the vinyl acetate monomer to provide an organic solution of oligomer and vinyl acetate monomer, where said organic solution is dispersed into and polymerized in water to produce an oligomer modified vinyl acetate emulsion polymer where the oligomer is soluble in the polymerized vinyl acetate monomer.
Dependencies are inferred from the claim text.