POLYURETHANE COMPOSITE FOR COVER Russian patent published in 2002 - IPC

FIELD: polymers. SUBSTANCE: invention relates to composites of polyurethane film-forming covers for cold drying. Composite for covers comprising of polyoxypropylenetriol of molecular mass 4500-5000 Da, polyisocyanate based on 4,4'-diphenylnethanediisocyanate and ethyl acetate has additionally polyoxypropylenetriols of molecular mass 370 Da or 500 Da that ensures to enhance rupture strength of cover by 1.2-1.6-fold, adhesion to steel 3 and expand the possibility of its using up to temperature 15 C. Invention can be used as protective cover of articles made of wood, concrete, metallic structures. EFFECT: enhanced strength and adhesion indices of composite, expanded temperature range in exploitation. 2 tbl, 12 ex