초록 ▼

Polymeric coatings are provided on steel pipes to protect the same against corrosion. Monomers and prepolymers are permanently adhered to the surface of steel pipes by graft polymerization to form a barrier which keeps out moisture, oxygen and other corrosive gases from the steel substrate. The mono

Polymeric coatings are provided on steel pipes to protect the same against corrosion. Monomers and prepolymers are permanently adhered to the surface of steel pipes by graft polymerization to form a barrier which keeps out moisture, oxygen and other corrosive gases from the steel substrate. The monomers and prepolymers are chosen to provide a low moisture vapor transmission rate and oxygen permeability.

대표청구항 ▼

Composition which when cured in contact with a steel object forms a coating thereon to protect the steel object against corrosion, said composition comprising an aqueous emulsion of: (a) hydroxyethyl or hydroxypropyl methacrylate, methyl, ethyl or butyl acrylates or methacrylates, dimethylamino or d

Composition which when cured in contact with a steel object forms a coating thereon to protect the steel object against corrosion, said composition comprising an aqueous emulsion of: (a) hydroxyethyl or hydroxypropyl methacrylate, methyl, ethyl or butyl acrylates or methacrylates, dimethylamino or diethylamino, ethylacrylates or methacrylates, or vinyl pyrrolidone, or mixtures thereof, as monomer, (b) epoxy resins based on bisphenol A and epichlorohydrin, phenol based or cresol based poly functional epoxy novolac resins, water reducible epoxy esters, water reducible urethane prepolymers or hydroxyl terminated or carboxyl terminated acrylic prepolymers, as prepolymer, (c) a silver, ferric ferrous, cupric or cobalt salt or mixtures thereof as graft initiator, (d) a peroxide or persulfate as catalyst, and (e) water. Method for protecting the surface of a steel object, which comprises applying the composition of claim 1 to the surface of the steel object and curing said composition in contact with said surface.