Process for reinforced reaction injection molding of polyurethanes

Claim 1

A process for the preparation of reinforced reaction injection molded polyurethane foam comprising reacting an organic polyisocyanate, a polyoxyalkylene polyether polyol, chain extending agent, catalyst, optionally a blowing agent, and milled glass fibers dispersed in said polyol employing an effective amount of a suspending agent which is a salt of the acid diester of the formula ##STR1## wherein X represents an alkylene radical with 2 to 3 carbon atoms; R 1 represents a member selected from the group consisting of a saturated acyclic hydrocarbon radical having 11 to 23 carbon atoms, a saturated acyclic hydrocarbon having 11 to 23 carbon atoms and being substituted by a hydroxyl group, an olefinic acyclic hydrocarbon radical having 11 to 23 carbon atoms; and an olefinic acyclic hydrocarbon radical having 11 to 23 carbon atoms and being substituted by a hydroxyl group; R 2 represents a member selected from the group consisting of a phenylene radical, a divalent saturated acyclic hydrocarbon radical, a divalent saturated acyclic hydrocarbon radical being substituted by a hydroxy group, a divalent saturated acyclic hydrocarbon radical being substituted by a carboxyl group, a divalent olefinic acyclic hydrocarbon radical, a divalent olefinic acyclic hydrocarbon radical being substituted by a hydroxyl group, and a divalent olefinic acyclic hydrocarbon radical being substituted by a carboxyl group, said divalent saturated and olefinic acyclic hydrocarbon radicals having 2 to 3 carbon atoms; R 3 and R 4 represent members selected from the group consisting of hydrogen, a lower alkyl radical, a lower alkyl radical being substituted by hydroxyl group, and a cyclohexyl radical, said radicals containing from 1 to 6 carbon atoms; R 5 represents a member selected from the group consisting of a lower alkyl radical, a lower alkyl radical substituted by a hydroxyl group, and a cyclohexyl radical, said radicals containing from 1 to 6 carbon atoms and n is an integer ranging from 4 to 25.