Patent ID: 6180177
Filing Date: 2001-01-30
Classification: C08G,C09D,C23C

Abstract:
A composition of surface treatment agent used for metallic material, characterized by consisting essentially of the following components dissolved in a water-soluble medium:(A) a cationic component, which consists of divalent or higher valent metallic ions selected from the group consisting of manganese, cobalt, zinc, magnesium, nickel, iron, titanium, aluminum and zirconium;(B) at least one acid component selected from the group consisting of (1) fluoro-acid which contains four or more fluorine atoms, and one or more elements selected from the group consisting of titanium, zirconium, silicon, hafnium, aluminum and boron, and (2) acetic acid;(C) a silane coupling-agent component which consists of one or more compounds which contain at least one reactive functional group selected from an amino group containing active hydrogen, an epoxy group, a vinyl group, a mercapto group and a methacryloxy group;(D) one or more water-soluble polymer components which are expressed by the following general formula (I) and has a polymerization degree of from 2 to 50 of the polymeric unit, ##STR5##in the formula (I), X.sup.1 bonded to the benzene ring is hydrogen atom, a hydroxyl group, an alkyl group of C.sub.1 to C.sub.5, a hydroxylalkyl group of C.sub.1 to C.sub.10, aryl group of C.sub.6 to C.sub.12, a benzyl group, a benzal group, an unsaturated hydrocarbon group (formula II) which condenses with said benzene ring to form a naphthalene ring, or formula III; in the formula (II) X.sup.2 bonded to the benzene ring is hydrogen atom, a hydroxyl group, an aryl group of C.sub.6 to C.sub.12, a benzyl group and a benzal group, ##STR6##R.sup.1 and R.sup.2 in the formula (III) are, each or independently from one another, a hydrogen atom, a hydroxyl group, an alkyl group of C.sub.1 to C.sub.6 or a hydroxyalkyl group of C.sub.1 to C.sub.10, and Y.sup.1 and Y.sup.2 bonded to the benzene ring in the formula (I), (II) and (III) are a Z group expressed by the following formula (IV) and (V), ##STR7##in said formula (IV) and (V) R.sup.3, R.sup.4 R.sup.5, R.sup.6 and R.sup.7 are, each or independently from one another, a hydrogen atom, an alkyl group of C.sub.1 to C.sub.5 or a hydroxyalkyl group of C.sub.1 to C.sub.10, X.sup.1, Y.sup.1 and Y.sup.2 coupled to a benzene ring of said polymerization units may each be the same as or different from the X.sup.1, Y.sup.1 and Y.sup.2 coupled to the other benzene rings, and the value of substitution of said Z group in each benzene ring of said polymer molecules is from 0.2 to 1.0 in average.