Water-soluble or water-swellable crosslinked copolymers
US7208556B2 · kind B2 · utility
16Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Jul 30, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/585
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-soluble or water-swellable crosslinked copolymers consisting essentially of structural units of the formula 1or a mixture of the structural units of the formula 1 with structural units of the formula 2and structural units of the formula 3where R, R1, R2, R3, Z and n are as defined in the description. These copolymers are crosslinked with compounds which contain at least two olefinic double bonds. These crosslinked copolymers are suitable as thickeners, in particular for cosmetic and pharmaceutical preparations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.