FIELD: chemistry.
SUBSTANCE: present invention relates to the polyaddition reaction polyisocyanate products strength improvement method. Method comprises reacting, with the isocyanate index of at least 100, of isocyanates and isocyanate-reactive compounds and optionally catalytic compounds and foaming agents. Said isocyanate-reactive compounds include 1-20 weight parts of compounds selected from polyols, which are the dimeric fatty acids derivatives. Polyaddition reaction polyisocyanate products rigid blocks content is not less than 40%.
EFFECT: produced by this method polyisocyanate products have improved strength, have rigid blocks content of more than 40%, and glass transition temperature greater than 80°C.
15 cl, 2 tbl, 6 ex
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