Starch compatible polyvinyl acetate latices
US4228047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Oct 31, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D103/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Aqueous coating compositions comprising latices containing a copolymer of vinyl acetate in the range of about 95-99.9% by weight and maleic anhydride in the range of about 0.1-5% by weight have been found to have improved starch binder compatibility. Vinyl acetate and maleic anhydride are polymerized in an aqueous medium in the presence of a free radical initiator and a surfactant which prevents the vinyl acetate-maleic anhydride copolymer from dissolving in the aqueous medium. The resulting latex coating compositions have a high solids content (greater than about 50% by weight) and a copolymer particle size of under 0.5 microns in addition to the excellent starch compatibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.