Thermoset polymer compositions
AssigneeAshland Oil, Inc.
InventorsAnil B. Goel, Timothy A. Tufts, Joseph G. Holehouse
Life of this patent
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Abstract
Thermoset polymers are prepared by reacting an ethylenically unsaturated resin monomer and a bicyclic amide acetal with a polyisocyanate in the absence or presence of a vinyl monomer. Reaction rates are suitable for effecting RIM processing. The resultant polymers exhibit improved impact resistance. Further variation in physical properties can be achieved through the use of a diol chain extender for the polyisocyanate.
Claims10
An interconnected polymer comprising the substantially insoluble and infusible cured polymerization reaction product of (1) a polyisocyanate, (2) a bicyclic amide acetal corresponding to the formula:
- ##STR4## Wherein R is H or alkyl;
- R.sub.1 and R.sub.2 is H, alkyl, aryl or alkoxy;
- and R.sub.3 is alkyl, alkaryl or aryl and (3) a hydroxy group bearing free radically polymerizable ethylenically unsaturated monomer, containing at least one vinyl group of the formula:
- ##STR5## where Y is ##STR6## R is hydrogen, an alkyl group or an aryl group, R' and R" are independently an alkylene group or an alkylene ether group having from 2 to 10% carbon atoms, and n is an integer from 1 to 10 and therein the isocyanate index of the resin-forming reaction mixture is between about 0.8 and 3 and wherein the relative weight ratio of (2) and (3) is from 1:99 to 50:50, respectively.
Dependencies are inferred from the claim text.