FIELD: chemistry.
SUBSTANCE: composition is obtained by mixing of (a) first polyurethane with end silane groups obtained by interreaction of: (i) monofunctional compounds with (ii) isocyanate component containing two isocyanate groups and following interreaction of reaction product of components (i) and (ii) with (iii) compound containing group reactive toward isocyanate and one or more reactive silane groups whereat at least 10 mole % of component (iii) is compound of formula (I): 
with formation of moisture-crosslinked alcoxysilane functional polyesterurethane; and (b) second polyurethane with end silane groups obtained by interreaction of: (i) linear, branched or cyclic alkylmonofunctional alcohol containing 1-20 of carbon atoms, amine and/or thiol with (ii) isocyanate component containing two isocyanate groups and with product of the interreaction of components (i) and (ii) with compound (iii) containing group reactive toward isocyanate and one or more reactive silane groups corresponding to formula (I).
EFFECT: coating films applied to the substrate possess excellent tensile strength and tensile elongation which provides reducing of film cracking, blistering and peeling.
17 cl, 4 ex
