A curable composition based on silylated polyurethanes

A method is described for preparing crosslinkable compositions, comprising in a first step, reacting one or more α, ω- difunctional organic polymers of the formula (1) XAX (1) with organofunctional silanes of formula (2) YR-Si- in the presence of catalysts (A) selected from the group consisting of potassium, iron, indium, zinc, bismuth and copper compounds to organyloxysilyl polymers P. Here, R is a divalent, optionally substituted hydrocarbon radical having 1 to 12 carbon atoms which may be interrupted by heteroatoms, R A represents a divalent, optionally substituted hydrocarbon radical having at least 6 carbon atoms, which may be interrupted by heteroatoms, m is equal to 0,1 or 2, and X is a hydroxyl group and Y is an isocyanate group or X is an isocyanate group and Y is a hydroxyl group or a primary or secondary amino group. In a second step, the polymers P