Polyacetal and polyketal hydrogels formed from acetals or ketals and polyols
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United States of America Patent
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Feb 6, 1990
Grant Date -
N/A
app pub date -
Mar 7, 1988
filing date -
Mar 7, 1988
priority date (Note) -
Expired
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Abstract
Water-soluble polyacetal or polyketal having the formula ##STR1## wherein R.sub.1, and R.sub.2 are aliphatic, cycloaliphatic or aromatic groups, for ketals; R.sub.1 is hydrogen and R.sub.2 is aliphatic, cycloaliphatic, or aromatic groups for acetals; R.sub.3 and R.sub.4 are also aliphatic, alkoxy, cycloaliphatic or aromatic groups X represents groups as (CH.sub.2).sub.n, O(CH.sub.2).sub.N O or ##STR2## that connect the pendant unsaturation to the aliphatic, cycloaliphatic or aromatic R.sup.4 groups, the ratio of a to b is 0.5 to 10, and n is 10-100.
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