Vinyl acetate binders in an above-critical pigment volume concentration coatings composition
US9834697B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2014 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Jul 30, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D143/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is an above-critical coating composition comprising an aqueous dispersion of polymer particles, pigment particles, and extender particles wherein the polymer particles comprise, in a single phase and based on the weight of the polymer particles, from 35 to 79.9 weight percent structural units of vinyl acetate and from 0.1 to 6 weight percent structural units of a phosphorus acid monomer or a salt thereof, wherein the polymer particles have a particle size by dynamic light scattering of from 250 nm to 500 nm. The above-critical composition shows surprising improvements in hiding with increasing particle size of the polymer particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.