Modified polyurethane liquid polymer compositions
AssigneeOlin Corporation
InventorsJames M. O'Connor, Donald L. Lickei, Michael L. Rosin
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Abstract
A novel, heat curable, liquid polymer composition is disclosed which comprises a modified urethane oligomer containing terminal ethylenic unsaturation and a free radical catalyst. In a preferred embodiment, the polymer composition further includes at least one additional component selected from a reinforcing agent and a filler; the cured composition demonstrates enhanced impact properties and is particularly useful in automotive body constructions.
Claims10
A process for preparing a polyurethane polymer product comprising mixing a urethane oligomer, a heat activated free radical generating catalyst, and at least one additional component selected from a reinforcing agent and a filler to a homogeneous blend, and then heating said mixture at a temperature adequate to activate said catalyst and cure said mixture, said urethane oligomer having a final free NCO content from 0% to about 20% and containing terminal reactive unsaturation and being prepared by reacting
- (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from about 0.5% to about 30% which is the product of reacting
- (1) an organic polyisocyanate with
- (2) a polyol having
- (i) an average equivalent weight of about 75 to about 500,
- (ii) an average functionality of at least about 3, with
- (b) an isocyanate reactive group-containing unsaturated monomer selected from the group consisting of
- (1) hydroxyalkyl acrylates,
- (2) hydroxyalkyl methacrylates and
- (3) hydroxyalkyl acrylamides.
Dependencies are inferred from the claim text.