POLYURETHANE COMPOSITION FOR COATING Russian patent published in 2003 - IPC

FIELD: polymers. SUBSTANCE: invention relates to compositions of polyurethane film-forming coatings for cold drying. Composition contains polyoxypropylenetriol with molecular mass 4500-5000 Da, polyisocyanate based on 4,4'-diphenylmethanediisocyanate and ethylcyanate and, additionally, perchlorovinyl ПСХ-ЛС and indene coumarone resins. Coating shows the following indices: impact strength is 1,1-fold and above; adhesion to Ст.3 is up to 1 point; chemical stability in benzine, acid and alkali dilute solutions is by 1.5-fold and above. Invention can be used as protective coating made of wood, concrete and metallic constructions. EFFECT: improved and valuable properties of composition. 1 tbl