Hydrophilic polyurethane emulsions and materials produced therefrom
US4920172A · kind A · utility
25Cited by
10References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Jan 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Solvent-free water-based emulsions of hydrophilic polyurethane polymers, their preparation and solvent-free coatings produced from the emulsions are described. Also described are compositions produced by subjecting a homogeneous blend of a curable polymer precursor such as rubber latex and the polyurethane emulsion to curing conditions. Moisture permeable membranes, water swellable sealants, extruded shapes and active agent media are produced from the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.