Moisture-curable polyurethane composition with reduced surface tackiness

A method comprising:

• introducing a monoamine MA of formula (V),
• into a moisture-curable composition comprising at least one polyurethane polymer P having isocyanate groups and at least one blocked polyamine BA having blocked, hydrolytically activatable amino groups, to form a mixture, the monoamine MA of formula (V) being present in the mixture in an amount effective to reduce the surface tackiness and/or the elastic modulus of a cured form of the mixture, and curing the mixture to form a cured product with reduced surface tackiness and/or elastic modulus relative to a corresponding cured product prepared in an identical manner but without the monoamine MA of formula (V),
• where
• Ra represents a linear, cyclic, or branched alkyl or alkenyl radical or optionally substituted aryl radical with 1 to 12 C atoms and optionally comprising ether oxygen atoms;
• Rb and Rc either independently represent a rest Ra or a hydrogen atom, with the provisio that at least one of Rb and Rc is a hydrogen atom, or Rb and Rc together with the N atom of monoamine MA form an aldimine group that under influence of water hydrolyzes to a aldehyde and an amine Ra—NH2;
• wherein
• said polymer P is the reaction product of 2,4- and/or 2,6-toluylene diisocyanate (TDI) and at least one polyol, wherein the polyol has an average functionality of >2;
• and
• wherein the amount of said monoamine MA in the composition is between 0.2 and 25 weight parts per 100 weight parts of said polymer P.