| abstract |
The present invention relates to an isocyanate-functional prepolymer that can be obtained by a) reacting an H-functional starter compound having at least one Zerewitinoff-active H atom with an alkylene oxide compound and a comonomer to form a precursor stage bearing hydroxyl groups, wherein the comonomer is selected from the group comprising lactides, glycolides, cyclical dicarboxylic acid anhydrides and combinations thereof, and wherein the comonomer is installed by a statistical copolymerization into the polymer chain(s) of the precursor stage bearing hydroxyl groups, and b) reacting the precursor stage bearing hydroxyl groups from step a) with a polyfunctional isocyanate to form an isocyanate-functional prepolymer. The invention further relates to a method for producing said isocyanate-functional prepolymer, to a fabric adhesive system containing such an isocyanate-functional prepolymer, and to a metering system with at least two chambers and such a fabric adhesive system. |