Selected methylol-substituted trihydroxybenzophenones and their use in phenolic resin compositions
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United States of America Patent
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Aug 24, 1993
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app pub date -
Sep 30, 1992
filing date -
May 31, 1988
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Abstract
A methylol-substituted trihydroxybenzophenone of the formula (I): ##STR1## This methylol-substituted trihydroxybenzophenone may be reacted with selected phenolic monomers during or after the formation of a phenolic novolak resin thereby said resin having at least one unit of formula (II): ##STR2## wherein R and R.sub.1 are individually selected from hydrogen, a lower alkyl group having 1 to 4 carbon atoms or a lower alkoxy group having 1 to 4 carbon atoms.
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