LIQUID PREPOLYMER HARDENER WITH END ISOCYANATE GROUPS Russian patent published in 1998 - IPC

FIELD: chemistry of polymers, more particularly manufacture of cast products from polyurethane elastomers and polyurethane coatings. SUBSTANCE: present invention describes liquid prepolymer hardener having good aggregate stability at temperatures below 90 C. Liquid prepolymer hardener with end isocyanate groups includes 3,3'-dichloro-4,4' -diaminodiphenyl methane and non volatile solvent. Said unvolatile solvent includes polyols with molecular weight of 2100-5000, the ratio of components is as follows, wt.pts): 3,3'- dichloro-4,4'-diamino-diphenyl methane, 20-50; and nonvolatile solvent, 80-50. EFFECT: improved properties. 1 dwg, 9 ex, 1 tbl