Modified polyurethane liquid polymer compositions
AssigneeOlin Corporation
InventorsJames M. O'Connor, Willie J. Sessions
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Abstract
A novel, heat curable, liquid polymer composition is disclosed which comprises a modified urethane oligomer containing ethylenic unsaturation, a free radical catalyst, a polyfunctional mercaptan, and a filler.
Claims26
A polyurethane liquid polymer composition comprising a urethane oligomer, a polyfunctional mercaptan monomer, a heat activated free radical generating catalyst, and a filler, said urethane oligomer having a final free NCO content from 0 to about 20 percent and being prepared by reacting
- (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from about 0.1 to about 30 percent which is the product of reacting
- (1) an organic diisocyanate with
- (2) an aliphatic polyol having
- (i) an average equivalent weight of about 300 to about 4,000,
- (ii) an average functionality of about 2 to about 3, and
- (iii) said aliphatic polyol is selected from the group consisting of aliphatic polyether polyols, aliphatic polyester polyols and mixtures thereof, with
- (b) an isocyanate reactive group-containing unsaturated monomer selected from the group consisting of
- (1) unsaturated acrylates and
- (2) unsaturated amides.
A process for preparing a vulcanized polyurethane polymer product comprising mixing a urethane oligomer, a polyfunctional mercaptan monomer, a heat activated free radical generating catalyst, 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 percent and being prepared by reacting
- (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from about 0.1 to about 30 percent which is the product of reacting
- (1) an organic diisocyanate with
- (2) an aliphatic polyol having
- (i) an average equivalent weight of about 300 to about 4,000,
- (ii) an average functionality of about 2 to about 3, and
- (iii) said aliphatic polyol is selected from the group consisting of aliphatic polyether polyols, aliphatic polyester polyols and mixtures thereof, with
- (b) an isocyanate reactive group-containing unsaturated monomer selected from the group consisting of
- (1) unsaturated acrylates and
- (2) unsaturated amides.
Dependencies are inferred from the claim text.