Process for preparation of high water-absorbent polymer beads
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United States of America Patent
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May 1, 1984
Grant Date -
N/A
app pub date -
Mar 22, 1982
filing date -
Mar 25, 1981
priority date (Note) -
Expired
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Abstract
Water-insoluble, high water-absorbent polymer beads are prepared by dispersing and suspending an aqueous solution of a water-soluble, ethylenically unsaturated monomer containing a small amount of a crosslinking agent in a dispersion medium of a hydrocarbon or a halogenated aromatic hydrocarbon, carrying out the bead polymerization in the presence of a water-soluble radical polymerization initiator and a protecting colloid comprising a cellulose ester or cellulose ether which is oil-soluble at the polymerization temperature, and separating the resulting beads.
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