Process for dispersing polymer gel particles in aqueous medium
US4778836A · kind A · utility
32Cited by
10References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1985 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/916
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A water soluble or swellable polymer gel is dispersed into a liquid phase to form a fluid composition and is worked while in that composition. The liquid phase is an aqueous solution of an equilibrating agent that substantially prevents aggregation of the particles or dissolution of the polymer during the working. The working may be, for instance, milling, extraction of impurities, extraction of water, transportation or chemical modification. Preferred equilibrating agents are sodium polyacrylate and polydiallyl dimethyl ammonium chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.