Curable lactone derived resins
AssigneePPG Industries, Inc.
InventorWen-Hsuan Chang
Life of this patent
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Abstract
Curable lactone derived resins are the reaction product of (a) a lactone modified resin of the formula ##STR1## wherein X is the organic radical formed by removing at least one hydroxyl hydrogen atom from an ester containing from 1 to 3 acrylyl or alpha-substituted acrylyl groups and one or two hydroxyl groups, R is hydrogen or an alkyl group having from 1 to 12 carbon atoms, x is from 4 to 7 wherein at least (x+ 2) R's are hydrogen, n has an average value of from about 0.2 to about 5 and a is 1 or 2; and (b) an isocyanate. The lactone derived resins are especially useful for floor tile coatings which are UV curable. The coatings are abrasion resistant, yet are flexible.
Claims23
A curable lactone derived resin which is the reaction product of:
- (a) from about 30 percent to about 95 percent by weight of a lactone modified resin of formula ##STR6## wherein X is the organic radical formed by removing at least one hydroxyl hydrogen atom from an ester containing from 1 to 3 acrylyl or alpha-substituted acrylyl groups and one or two hydroxyl groups, R is hydrogen or an alkyl group having from 1 to 12 carbon atoms, x is from 4 to 7 and at least (x+2) R's are hydrogen, n has an average value of from about 0.2 to about 5, and a is 1 or 2;
- and
- (b) from about 5 percent to about 70 percent by weight of an isocyanate.
A process of making a UV curable lactone derived resin, comprising the steps of:
- (a) reacting a (1) lactone of formula ##STR7## wherein R is hydrogen or an alkyl group having from 1 to 12 carbon atoms, x is from 4 to 7, and at least (x+2) R's are hydrogen with (2) an ester containing from 1 to 3 acrylyl or alpha-substituted acrylyl groups and one or more hydroxyl groups;
- and
- (b) reacting from about 30 percent to about 95 percent by weight of the product of step (a) with from about 5 percent to about 70 percent by weight of an isocyanate to form the lactone derived resin.
Dependencies are inferred from the claim text.