Reinforced polyurethane-urea elastomers and their use

A process for producing a reinforced polyurethane-urea elastomer having a urea content ranging from about 70 to about 95 mol % and a urethane content ranging from about 5 to about 30 mol %, based on mol % of an NCO equivalent, comprising reacting:

• a reaction mixture of a component A containing
• A1) one or more aromatic diamines having an alkyl substituent in at least one ortho position to the amino groups,
• A2) an aliphatic reactant containing at least one polyetherpolyol having a molecular weight of from about 500 to about 18,000 and having hydroxyl and/or primary amino groups,
• A3) optionally aliphatic amines,
• A4) one or more reinforcing agents,
• A5) optionally at least one of catalysts and additives, and
• A6) at least one metal salt chosen from compounds produced from
• i) the metals Li, Mg, Ca, Ba, Zn, Cu, Fe, Co and Ni, and
• ii) carboxylic acids having 8 to 40 C atoms, phosphorus-containing acids having 8 to 40 C atoms or sulfur-containing acids having 8 to 40 C atoms,
• with a prepolymer component B produced from
• B1) a polyisocyanate component consisting of a liquefied polyisocyanate or polyisocyanate mixture of the diphenylmethane series, and
• B2) a polyol component having an average molecular weight of from about 500 to about 18,000 containing at least one polyetherpolyol optionally containing organic fillers,
• wherein components A2) and B2) each independently have a functionality of 2 to 8, an ethylene oxide content of 40-100 wt. % and an alkyloxirane content of 0-60 wt. %, component A and component B reacted in stoichiometric proportions such that the isocyanate index of the elastomer ranges from about 80 to about 120 and wherein polyol component B2) introduced via component B comprises from about 10 to about 90 mol % of the urethane content.