Polyisocyanate polyaddition products based on polyols with low unsaturation

摘要

Isocyanate prepolymers obtained by reaction of (a1) polyisocyanates, (a2) polyols with low unsaturation and (a3) one or more chain extenders. An Independent claim is also included for polyisocyanate-polyaddition products obtained by reaction of: (a) an isocyanate-prepolymer which has been obtained by reaction of (a1) - (a3) as above; (b) high mol. compounds with ≥ 2 NCO-reactive H atoms; (c) one or more chain extenders; and optionally (d) foaming agent(s); and (e) catalysts or auxiliaries.