Epoxy resin compositions containing polyepoxides having at least two 1,2-epoxide groups are disclosed. The polyepoxides can be obtained by reacting (i) di- or polyepoxides or mixtures thereof with monoepoxides, (ii) one or more amines chosen from sterically hindered amines, disecondary diamines and diprimary diamines to form an epoxide-amine adduct, and (iii) subsequently reacting the epoxide-amine adduct with polyfunctional isocyanates. The composition also contains curing agents for the polyepoxides and can optionally contain additional 1,2-epoxide compounds and additives. The compositions are useful as coatings for bridging cracks, as adhesives and as constituents of paints.
A composition comprising (A) an epoxide containing at least two epoxy groups per molecule, (B) a polyol containing at least two hydroxy groups per molecule or a primary or secondary amine containing at least two amino-hydrogen atoms per molecule, and (C) a solid compound containing at least two isocyanate groups, exhibits high storage stability and is useful as protective coating or adhesive.
A method of modifying the permeability to water of a subterranean formation comprising injecting into the subterranean formation an aqueous composition comprising from about 0.005 percent to about 2 percent, by weight, of a water-soluble alkylene oxide branched polyhydroxyetheramine or a salt thereof, wherein the alkylene oxide branched polyhydroxyetheramine is prepared by reacting a diepoxide with one or more alkylene oxide functionalized amines and one or more amines having two reactive hydrogen atoms and optionally reacting the resulting polyhydroxyetheramine with an acid or alkylating agent to form the salt.
A composition comprising (A) an epoxide containing at least two epoxy groups per molecule, (B) a polyol containing at least two hydroxy groups per molecule or a primary or secondary amine containing at least two amino-hydrogen atoms per molecule, and (C) a solid compound containing at least two isocyanate groups, exhibits high storage stability and is useful as protective coating or adhesive.
