High solids ethylene-vinyl acetate latex
US6716941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Dec 2, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F218/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to an ethylene-vinyl acetate dispersion and a process for making the dispersion by polymerizing a monomer mixture having vinyl acetate and ethylene in a batch process, in the presence of a stabilizing system of polyvinyl alcohol and without added surfactants, to form an ethylene-vinyl acetate polymer dispersion. The copolymer dispersion has a solids level of greater than 65 percent by weight, and a viscosity of less than 5000 mPa·s when measured at 65 percent solids at 25° C. The dispersion can be dried to form a redispersible powder. Both the dispersion and powder are useful in adhesive and coating formulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.