Aqueous stain-blocking coating composition
US6485786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D133/062
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous stain-blocking coating composition including an aqueous emulsion copolymer having a glass transition temperature (Tg) from −20° C. to 60° C. and including, as polymerized units, at least one ethylenically unsaturated nonionic monomer and 1.5-6%, by weight based on the dry weight of the copolymer, ethylenically unsaturated strong acid monomer, such as a Phosphorous-containing strong acid monomer, or salts thereof is provided. Also provided is a method for blocking stains by applying the aqueous stain-blocking coating composition to a substrate bearing a stain; and drying, or allowing to dry, the aqueous composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.