Absorbent polymers, their manufacture and uses
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United States of America Patent
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Dec 25, 1990
Issued Date -
N/A
app pub date -
Feb 29, 1988
filing date -
Aug 15, 1984
priority date (Note) -
Expired
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Abstract
The properties of absorptive synthetic polymer particles formed by polymerisation of water soluble monomers such as sodium acrylate or acrylamide with a cross linking agent are improved, especially as regards absorptive capacity for aqueous electrolytes, by copolymerising the monomers with an ethylenically unsaturated monomer that includes a pendant group --A.sub.m B.sub.n A.sub.p R where B is ethyleneoxy, n is at least 2, A is propyleneoxy or butyleneoxy, m and p are each less than n and are preferably zero, and R is a hydrophobic group.
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