| abstract |
PROBLEM TO BE SOLVED: To provide a reactive composition based on an NCO prepolymer which overcomes the disadvantages of the prior art. (A) NCO prepolymers based on (cyclo) aliphatic polyisocyanates and having an NCO content of 1 to 8% by weight and a monomeric polyisocyanate content of less than 2% by weight, (B) at least 50 equivalents % (I) HO-XYX-OH (I) wherein Y is methylene, ethylene, -C≡C-, 1,4 —, 1,3- or 1,2-cyclohexylene or 1,4-, 1,3- or 1,2-phenylene, wherein X is methylene, —OCH 2 CH 2 — (where oxygen is a group Y Or a 1,4-, 1,3- or 1,2-cyclohexylene) -containing amine-free chain extender, and (C) 0 to 20% by weight based on the component (A). % Of an inert organic solvent, the free NCO group of the component (A) and the NCO- The present invention relates to a reactive composition having an equivalent ratio to a reactive group of 0.90 to 1.35. |