Patent ID: 8323400

Claim:
In a cementitious composition including an inorganic binder and a filler, the improvement comprising a reactive polymeric composition including: a nitrogen-containing polymer comprising monomers selected from the group consisting of vinyl amines, vinyl formamides, ethyleneamines, ethyleneimines, aminoethyl methacrylates, and caprolactams; and a reactive agent capable of crosslinking with the nitrogen of the polymer in situ within the cementitious composition; wherein the reactive agent is selected from the group consisting of: polyaldehydes selected from glyoxal, blocked glyoxal, glutaraldehyde, ketone formaldehyde and succinic dialdehyde; a dicarboxylic anhydride or polymer thereof; an epichlorohydrin resin; a zirconium salt; a cyclic amide condensate; and a polycarboxylic acid.