POLYMER COMPOSITION Russian patent published in 2010 - IPC C09D175/14 C08L75/04 C08G18/69 

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer composition for elastomeric waterproofing, roof coating, floor and sports field coatings. The composition contains 100 pts. wt isocyanate prepolymer and 11-31 pts. wt hardener. The isocyanate prepolymer used is obtained by reacting four moles of 4,4'-diphenylmethane diisocyanate and one mole of oligobutadiene diol with molecular weight of 2800-3200, containing 0.9-1.3% hydroxyl groups, while the prepolymer contains 8.0-9.7% isocyanate groups. The hardener used is 3,3'-dichloro-4,4'-diaminodiphenylmethane or a mixture of 2,4 and 2,6 isomers of 3,5-dimethylthiotoluylenediamine in ratio of 80:20.

EFFECT: polymer composition provides improved strength properties of elastomers and coatings obtained from it, specifically higher strength, hardness, relative elongation and adhesion properties of the coating.

1 tbl