Polymerization process
US4786681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1986 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Aug 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/911
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a process for producing a water-in-oil emulsion of a water-soluble polyacrylamide or polyacrylic acid polymer or copolymer by the inverse emulsion process characterized in that there is used as the emulsifying agent for the water-in-oil emulsion a water-insoluble, oil-soluble surface active agent of the formula (I): EQU X--Y--Z I or a functional derivative thereof, wherein X- represents a saturated or unsaturated hydrocarbon chain containing from 30 to 500 carbon atoms, --Y-- represents a succinic anhydride residue carried terminally upon the group X--, and --Z represents a hydrophilic group carried by the group --Y--.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.