Polyurethane thickeners for aqueous compositions
US4155892A · kind A · utility
154Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1977 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Oct 3, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Latex and other aqueous systems are thickened by incorporation of a low molecular weight polyurethane characterized by at least three hydrophobic groups interconnected by hydrophilic polyether groups. The thickeners are nonionic, hydrolytically stable and are resistant to biodegradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.