Process for producing a water-absorbent resin
US4880888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1987 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Jan 5, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-absorbent resin having excellent physical properties can be produced by a process wherein an aqueous solution containing an .alpha.,.beta.-unsaturated carboxylic acid and an alkali metal salt thereof in a total amount of 25% by weight or more is subjected to polymerization with a radical polymerization initiator in a petroleum-based hydrocarbon solvent in the presence or absence of a crosslinking agent, characterized by using, as a surfactant, a polyglycerine--fatty acid ester having an HLB of 2 to 16 and represented by the general formula ##STR1## (wherein R is an acyl group or hydrogen atom and n is an integer of 0 to 8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.