Patent ID: 7772312

Claim:
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, the elastomers produced by 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.