Process for producing a water-absorbent resin
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United States of America Patent
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Nov 14, 1989
Grant Date -
N/A
app pub date -
Jan 5, 1987
filing date -
Jan 24, 1986
priority date (Note) -
Expired
status (Latency Note)
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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).
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