Surface treatment for metal, process for surface treatment...

C - Chemistry – Metallurgy – 23 – C

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C23C 22/40 (2006.01) C08G 18/08 (2006.01) C08L 67/00 (2006.01) C09D 5/08 (2006.01) C09D 167/00 (2006.01) C09D 175/04 (2006.01) C23C 22/34 (2006.01) C23C 22/36 (2006.01) C23C 22/42 (2006.01) C23C 22/48 (2006.01) C23C 22/53 (2006.01) C08K 3/10 (2006.01) C08K 5/098 (2006.01) C08L 61/04 (2006.01)

Patent

CA 2451471

A surface treatment for metal, prepared by adding a cationic or nonionic, urethane, acrylic, epoxy, polyester, or polyamide resin, a resin compound represented by the general formula (I), and a compound of Zr, Ti, V, Mo, W, Mn, or Ce to water; a process for surface treatment of metallic substances; and surface-treated metallic substances: (I) [wherein R1 is -CH2-, -CH2-NH-CH2- , or -CH=N-CH2-; Y is H or a group represented by the general formula (II): (II) Z is a residue of an aromatic compound or the like; W is H or a group (P) selected from among -CH2X, -CH2NHCH2X, and -CH=NCH2X (wherein X is OH, OR4, halogeno, -N(R5)(R6), or -N+(R7)(R8)(R9)A-) , with the proviso that the degree of substitution with the group (P) satisfies the relationship: (number of Ps) / (total number of benzene rings and Zs) = 0.2 to 4.0; n is 0 to 29; and m is 0 to 10]. The surface treatment is free from chromium and can impart excellent corrosion resistance, alkali resistance and fingerprinting resistance to metallic substances.

L'invention concerne un traitement de surface pour métal, qui repose sur l'adjonction d'un des éléments ci-après à de l'eau: uréthanne cationique ou non ionique, résine acrylique, époxy, polyester ou polyamide, composé de résine de formule (I). L'invention concerne également un procédé pour le traitement de surface de substances métalliques, et des substances métalliques soumises à ce traitement. Dans ladite formule, R?1¿ est -CH¿2?-, -CH¿2?-NH-CH¿2?-, ou -CH=N-CH¿2?-; Y est H ou un groupe de formule générale (II). Z est un résidu de composé aromatique ou autre; W est H ou un groupe (P) pouvant être: -CH¿2?X, -CH¿2?NHCH¿2?X, et -CH=NCH¿2?X (X étant OH, OR?4¿, halogéno, -N(R?5¿) (R?6¿), ou -N?+¿ (R?7¿) (R?8¿) (R?9¿) A?-¿), à condition que le degré de substitution avec le groupe (P) obéisse à la relation suivante: (nombre de P) / (nombre total de cycles benzéniques et de Z) = 0,2 à 4; n vaut de 0 à 29; et m vaut de 0 à 10. Ce traitement de surface, ne faisant pas appel au chrome, confère aux substances métalliques une excellente résistance à la corrosion, aux alcalis et aux empreintes.

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