Process for the production of highly water-absorbing but less water-soluble hydrogels
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United States of America Patent
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Sep 28, 1982
Grant Date -
N/A
app pub date -
Aug 19, 1980
filing date -
Feb 19, 1979
priority date (Note) -
Expired
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Abstract
A highly water-absorbing but less water-soluble hydrogel is produced by polymerizing at least one hydrophilic ethylenically unsaturated monomer, e.g., ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, or derivatives thereof, in the presence of a specific difunctional compound, e.g., polyethyleneglycol diglycidyl ether, polyethyleneglycol diacrylate, etc.
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