Water-redispersible pulverulent composition of film-forming polymers prepared from ethylenically unsaturated monomers
US6369153B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Aug 3, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/0057
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a water-redispersible pulverulent composition obtained by a mixing and then drying an emulsion of at least one water-insoluble film-forming polymer, at least one main surfactant and at least one water-soluble compound, comprising a) an emulsion of at least one water-insoluble film-forming polymer prepared from ethylenically unsaturated monomers, b)at least one main surfactant whose water/surfactant binary phase diagram contains an isotropic phase which is fluid at 25° C. up to a concentration of at least 50% by weight of surfactant, followed by a hexagonal or cubic type rigid liquid crystal phase at higher concentrations which is stable at least up to the drying temperature, and c) at least one water-soluble compound. The invention relates, in addition, to a process for preparing such a composition and to its use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.