Two-component systems for the production of flexible coatings

Coating systems of two components containing at Menosa) a polyisocyanate prepolymer which has polyether groups attached via allophanate groups with a number average pesomolecular 700 to 50,000 g / mol, a viscosity at 23C of 500 to 100,000 mPas, of formulageneral (II), in queQ1 and Q2 independently of one another are the radical of a linear aliphatic diisocyanate and / or cyclic, R3 and R4 independently are hydrogen or an alkyl group C1-C4, being R3 and R4 preferiblementehidrogeno and / or groups methyl and each recurring k the meaning of R3 and R4 may serdistinto unit, Y is the residue of an initiator molecule polyhydroxy a functionality of 2 to 6 containing at least one polyether polyol, and consiguientez is a number of 2 to 6 when different starter molecules should not be used ningunnumero whole and COMOK preferably corresponds to many monomeric units to the weight average molecularnumerico po Lieter in that the structure is based amounts to 300 to 20,000 g / mol m is 1 or 3, which are obtained by reaccionarA1) one or more aliphatic and / or cycloaliphatic using A2) one or more polyhydroxyl compounds of which at least one is one polyetherpolyol I giving a polyurethane prepolymer NCO functionality, and whose urethane groups thus formed then acontinuacion is alofanatizan partially or totally with addition deA3) polyisocyanates, which may be different from A1) and a4) catalysts and a5) optionally stabilizers case, b) polyaspartic ester aminofunctional of general formula (I) Quex represents an organic moiety n-valent obtained by removing the primary amino groups deuna n-functional polyamine, R1, R2 represent identical or different organic moieties are inert under the conditions of reaction agrupos isocyanate front and n represents an integer of at least 2.