Vinyl acetate/ethylene copolymer emulsions having improved wet tack properties
US5143966A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Nov 7, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F218/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a vinyl acetate-ethylene copolymer emulsion prepared by the aqueous emulsion copolymerization of vinyl acetate and ethylene in the presence of a polyvinyl alcohol stabilizing system, the improvement which comprises a vinyl acetate-ethylene copolymer emulsion prepared in the presence of a stabilizing system consisting essentially of: PA1 (a) 0.2 top 1.5 wt % low molecular weight, partially hydrolyzed polyvinyl alcohol, PA1 (b) 0.5 to 2.5 wt % medium molecular weight, partially hydrolyzed polyvinyl alcohol, and PA1 (c) 1 to 4 wt % medium molecular weight and/or high molecular weight, fully hydrolyzed polyvinyl alcohol, the weight percentages based on vinyl acetate monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.