Process for the preparation of filler-containing, antionically modified polyurethane (urea) compositions, the polyurethane (urea) compositions so-obtained, and the use thereof

Claim 1

A process for the production of filler-containing polyurethane (urea) compositions comprising reacting: (A) at least one di- and/or polyfunctional isocyanate-terminated prepolymer having an isocyanate group content of from 1 to 12% by weight, (B) from 0 to 50% by weight based on the weight of (A) of a lower molecular weight organic di- and/or polyisocyanate, with the mixture of (A) and (B) having anisocyanate group content of 30% by weight or less. (C) a stoichiometric excess quantity of water, and (D) from 0 to 50 equivalent % based on the total isocyanate equivalents in (A) and (B) of a member selected from the group consisting of (i) organic di- and/or polyamines, (ii) organic compounds containing at least one group which is reactive with an isocyanate group and at least one anionic group or group capable of forming an anionic group, and (iii) mixtures thereof, in the presence of (E) from 5 to 97% by weight of fillers selected from the group consisting of (i) finely divided or lumpy foam particles, (ii) fossil lignocelluloses, (iii) carbon powder, and (iv) mixtures thereof, said % by weight of component (E) being based on the total moisture-free weight of components (A), (B), (D) and (E), said filler-containing polyurethane (urea) having a water absorbability of from 33 to 97% by weight, and having an anionic group content of from 10 to 3000 milliequivalents of anionic groups and/or groups capable of anionic group formation per 1000 grams of components (A), (B) and (D).