Refluxing water-in-oil emulsion process for preparing water-soluble polyelectrolyte particles
US4037040A · kind A · utility
15Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1976 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Mar 8, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/909
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a process for preparing water-soluble polyelectrolytes by a water-in-oil emulsion process. A mixture of a surfactant, free radical initiator, at least one water-soluble, oil-insoluble, ethylenically unsaturated monomer adapted to polymerize under refluxing conditions, oil and water (the oil and water being adapted to form an azeotropic boiling mixture) is heated with vigorous agitation. The monomer polymerizes at the reflux temperature under the vigorous agitation with a concomitant simultaneous loss of water. Finely divided, water-soluble particles result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.