Modified polyurethane liquid polymer compositions

Claim 1

A process for preparing a polyurethane polymer product comprising mixing a polyurethane 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 polyurethane oligomer having an equivalent ratio of NCO to OH from about 0.8/1 to about 2/1 and being prepared by reacting (a) an organic polyisocyanate; (b) a polyol reactant comprising (i) a high functionality polyol having an average equivalent weight from about 75 to about 500 and an average functionality of at least about 3, said high functionality polyol being prepared by reacting an alkylene oxide, or a mixture of alkylene oxides, with a polyhydric initiator comprising a carbohydrate or a carbohydrate derivative, and (ii) a chain extender having an average equivalent weight from about 31 to about 4,000 and an average functionality of about 2, said chain extender being employed in an amount ranging from about 20 to about 1,500 parts by weight per 100 parts by weight of said high functionality polyol; and (c) an isocyanate reactive group-containing unsaturated monomer selected from the group consisting of (i) hydroxyalkyl acrylates, (ii) hydroxyalkyl methacrylates, (iii) hydroxyalkyl acrylamides, and (iv) mixtures thereof; and wherein there is employed an equivalent ratio of said isocyanate reactive group-containing unsaturated monomer to said polyol reactant in the range from about 0.6/1 to about 3/1.