Vinyl acetate/acrylate copolymer emulsions for paper coating compositions
US4609704A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1984 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Nov 9, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/60
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Aqueous vinyl ester/acrylate copolymer emulsions possessing enhanced wet pick strength in paper coating compositions comprise a vinyl ester/acrylate copolymer colloidally dispersed in an aqueous medium, the copolymer consisting essentially of (a) a vinyl ester of a C.sub.1 -C.sub.12 alkanoic acid, (b) 2 to 50 wt % of an alkyl acrylate, and (c) 0.1 to 10 wt % of an ethylenically unsaturated mono- or dicarboxylic acid or half ester thereof. The copolymer is prepared by an aqueous emulsion polymerization process comprising the use of a stabilizer system consisting essentially of an alkylphenoxy polyethoxy ethanol and an anionic surfactant and, in the preferred embodiment, the use of a seeding procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.