PROCESS FOR PREPARING ISOCYANATOURETHANES Russian patent published in 1996 - IPC

FIELD: process for preparation of isocyanatourethane solutions. SUBSTANCE: process comprises reacting toluylenedelisocyanate with glycerol, diethylene glycol or mixture thereof at molar ratio of isocyanate and hydroxyl groups within (1.7-2.0): 1 in the presence of pentacrythoite in amount of 0.06-0.6 % based on the weight of the starting reagents. The reactants are heated to 65-70 C and maintained for 6-8 hours. The process can be carried out in the presence of urethane formation catalyst. EFFECT: more efficient preparation process. 3 tbl