| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to liquid rubber based compositions for coating playgrounds, floors, roofs and applying insulation coatings in construction. The coating composition contains an isocyanate prepolymer obtained from reacting 4,4'-diphenylmethanediisocyanate and oligodienediol with molecular weight 2800-3200, content of hydroxyl groups of 0.88-1.3% with ratio of isocyanate to hydroxyl groups equal to 4:1, with content of isocyanate groups in the prepolymer of 8.0-9.7%, a base - rubber composition from low-molecular weight hydroxyl-containing rubber, plasticiser, filler, anti-ageing agent and a pigment, a urethane formation catalyst and a mixture of 2,4- and 2,6-isomers of 3,5-dimethylthiotoluylene diamine in ratio of 80:20. ^ EFFECT: composition increases strength, hardness and relative elongation of the coating. ^ 2 tbl |
