Multi-component composition for manufacturing polyurethane/urea cementitious hybrid systems

A multi-component composition comprising:

• (A) at least one isocyanate component selected from the group consisting of monoisocyanate, polyisocyanate and NCO terminated prepolymer;
• (B) at least one organic isocyanate-reactive compound selected from the group consisting of polyol, polyamide, polyamine, and polyesteramide;
• (C) water;
• (D) catalyst;
• (E) at least one acidic additive that is selected from diketones and compounds having the general formula (II):
• R1—COOCO—R2 (II)
• wherein
• R1 and R2 are independently from each other selected from the group consisting of C1-C30-alkyl, C2-C30-alkenyl, C3-C30-cyclolalkyl, C3-C30-heterocyclyl, C3-C30-heterocyclyl-C1-C30-alkyl, C6-C30-aryl, C6-C30-aryl-C1-C30-alkyl, C2-C30-heteroaryl, C2-C30-heteroaryl-C1-C30-alkyl, and C1-C30-alkoxy-C1-C30-alkyl, each of which radicals is optionally substituted by halogen, cyano, nitro, C1-C6-alkyl, oxo, acyl, or C3-C6-cycloalkyl, with the heteroatom being selected from N, O and S,
• or
• R1 and R2, together with the carbon and oxygen atoms attached thereto, form a saturated or unsaturated 5- to 10-membered hetero ring, the ring being optionally fused with phenyl, with R1 and R2 being optionally replaced by heteroatoms selected from N, O and S, and being optionally substituted by halogen, cyano, nitro, C1-C6-alkyl, oxo, acyl, or C3-C6-cycloalkyl;
• and
• (F) hydraulic binder;
• wherein the at least one acidic additive is present in an amount of 0.01 to 3 wt % based on the total weight of the composition.