Odor free, air dry, aqueous emulsion paints
US5326808A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.