Polymeric compositions and methods of using them
US4777200A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1986 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Oct 28, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/923
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dispersions in water-immiscible liquid of water-soluble or water-swellable polymer particles are stabilized by use of an aqueous emulsion of water insoluble viscosifying polymer particles that are swellable or soluble in the water-immiscible liquid. After adding the emulsion to the water-immiscible liquid, water is removed from around the particles of the viscosifying polymer, preferably by absorption into the water swellable or soluble polymer particles. Water-immiscible liquids in general can be thickened particularly effectively by use of an aqueous emulsion of water insoluble viscosifying polymer particles that are swellable but insoluble in the water-immiscible liquid. These insoluble particles have a dry size below 10 .mu.m and are formed from monomers of which 80 to 100% are hydrophobic, 30 to 100% are polar and hydrophobic, 0 to 20% are hydrophilic and not more than 30% by weight are aromatic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.