Polyurethane resin composition curable at room temperature, is useful as rapidly curing waterproof coating material

摘要

The room temperature curable polyurethane resin composition (I) comprises:(A) an isocyanate group terminated pre-polymer obtained by reaction of a toluenediisocyanate and a polyol. (B) an aromatic polyamine based curing agent, preferably a 3,3',5,5'-tetralkyl-4,4'-diaminodiphenylmethane of formula (1), optionally with up to 90 wt.% of a diethyltoluenediamine as a second aromatic polyamine. The ratio of isocyanate groups in (A) to amino groups in (B) is 0.8-2.0. R1-R4 = 1-4C alkyl