Aqueous dispersions
US5137961A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A surfactant-free aqueous polymer dispersion containing an anionic water-dispersible polyurethane and a vinyl polymer in a weight ratio of from 10:90 to 90:10, said dispersion having been obtained by: PA1 (A) forming a solution of an anionic water-dispersible isocyanate-terminated polyurethane in at least one vinyl monomer; PA1 (B) dispersing the solution in an aqueous medium; PA1 (C) chain extending the polyurethane, and either PA1 (D) adding further vinyl monomer, and PA1 (E) initiating polymerization of the vinyl monomer, or PA1 (F) initiating polymerization of the vinyl monomer, or PA1 (G) adding further vinyl monomer during polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.