Non-elastomeric rapid-setting polyurethanes

Claim 1

A non-elastomeric non-cellular product having a density of at least about 1 gram/cc which is demoldable within about 5 minutes after admixture of the components of a composition which is the reaction product of a polyurethane-forming composition comprising: A. a polyol component consisting of 1. a liquid monomeric aliphatic triol having from 3 to about 6 carbon atoms or mixtures thereof and 2. a liquid propylene oxide derivative having at least 2 hydroxyl groups and an OH equivalent weight of less than about 230 or mixtures thereof, wherein Components (A1) and (A2) are present in quantities such that the hydroxyl equivalent ratio of (A1): (A2) is from about 0.25:1 to about 2:1; B. an organic polyisocyanate; C. as a modifier substance a liquid ester of a carboxylic acid or mixtures thereof, said modifier having a boiling point above about 150° C; D. a non-amine containing catalyst for urethane formation; wherein Components (A) and (B) are present in quantities so as to provide an NCO:OH equivalent ratio of from about 0.8:1 to about 1.5:1; Component (C) is present in quantities of from about 10% to about 40% by weight based upon the sum of the weights of Components (A), (B) and (C); and Component (D) is present in quantities of from about 0.001% to about 2% by weight based upon the sum of the weights of Components (A), (B) and (C).