Water in oil emulsion process for preparing gel-free polyelectrolyte particles
US3975341A · kind A · utility
26Cited by
9References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Aug 5, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/911
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a process for preparing polyelectrolytes by a water-in-oil emulsion process. A water-in-oil azeotropic emulsion is heated with agitation and a concentrated aqueous solution of small amounts of a polymerization initiator and gel inhibitor and at least one water-soluble vinyl monomer adapted to polymerize at reflux temperature with a concomitant loss of water by azeotropic distillation is added thereto to polymerize said water-soluble monomer. The polymerized product including a gel inhibitor forms a gel-free aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.