To obtain a composition which is influenced neither by the moisture content in the air nor by the environmental temperature, maintains the pot life even in a high-temperature and high-humidity state, and neither suffers the deterioration of surface appearance nor swells due to bubbling, by blending a curing agent component containing selected active hydrogen compounds at a specified molar ratio with an isocyanato-terminated polyurethane prepolymer.
A curing agent component which contains active hydrogen compounds comprising aminated polyols having a hydroxyl number of 3 to 4 and obtained by subjecting alkyl-substituted 4,4'-diaminodiphenylmethanes having alkyl group(s) on the aromatic ring, diethyltoluenediamine, and amine compounds to addition reaction with an alkylene oxide and in which the molar ratio (NH2/OH1 of the groups containing active hydrogen atoms is (50 to 90):(10 to 50) is blended with a principal component comprising mainly an isocyanato- terminated polyurethane prepolymer obtained by reacting a polyol comprising mainly a polyoxyalkylene polyol with a polyisocyanate.
KAMEMURA ICHIRO
SAITO JOICHI
SASAKI KOICHI
