Patent ID: 7297757

Claim:
A resin surface treating agent for treating a surface of a first resin, comprising: as an effective component at least one cerium compound selected from tetravalent and trivalent cerium compounds, the resin surface treating agent being capable of activating the surface of the first resin so as to enhance a close contact of the surface of the first resin with a surface of another member made of a metal or a second resin; and a carrier for said effective component suitable for delivering the effective component into contact with the surface of the first resin and then being removed, wherein the tetravalent cerium compound is at least one selected from cerium (IV) hexanitrates, cerium (IV) tetraarmmonium sulfate, and cerium (IV) sulfate, and the trivalent cerium compound is at least one selected from cerium (III) acetate, cerium (III) ammonium nitrate, cerium (III) carbonate, cerium (III) chloride, cerium (III) fluoride, cerium (III) nitrate, cerium (III) sulfate, cerium (III) bromide, cerium (III) iodide, cerium (III) oxalate, cerium (III) perchloride, cerium (III) sulfide, and hydrates of the same.