Patent ID: 7390847

Claim:
A composition for the treatment of metal surfaces, containing a) at least one polymer as component A, composed of a structural element (1), at least three structural elements selected from the group consisting of structural elements (2), (4), and (5), and optionally further structural element(s) (3), wherein the structural elements 1-5 are represented by the following formulas where in structural element (1), R′ is hydrogen or an alkyl, cycloalkyl, aryl, aralkyl or alkaryl radical of less than 31 carbon atoms which may be unsubstituted or substituted by alkyl radicals or heteroatom-containing groups or may be interrupted by heteroatoms or may contain double bonds; in structural element (3), R″ and R′″ are any desired radicals having a molecular weight of <200 g/mol, in structural elements (2), (3) and (4), M, in each case independently of one another, are hydrogen or a cation, and in structural element (5), R is hydrogen or an alkyl, cycloalkyl, aryl, aralkyl or alkaryl radical which may be unsubstituted or substituted by alkyl radicals or heteroatom-containing groups or may be interrupted by heteroatoms; b) water or another solvent which is suitable for dissolving, dispersing, suspending or emulsifying the polymer (component A), as component B; c) optionally, surface-active compounds, dispersants, suspending media and/or emulsifiers, as component C, d) at least one salt, one acid or one base based on transition metal cations, transition metal oxo anions, fluorometallates or lanthanoids, as component D, and/or e) at least one acid selected from the group consisting of phosphoric acid, sulfuric acid, sulfonic acids, nitric acid, hydrofluoric acid and hydrochloric acid, as component E, and/or f) at least one further corrosion inhibitor as component F, and/or g) compounds of Ce, Ni, Co, V, Fe, Zn, Zr, Ca, Mn, Mo, W, Cr and/or Bi as component G, and/or h) further assistants and additives as component H, wherein the polymer (component A) is prepared by polycondensation, wherein the following components are reacted with one another: (1) at least one aldehyde as component Aa, (2) at least one aromatic compound which carries at least one OM group or one sulfo group, —SO 2 OM, or both groups, as component Ab, (3) optionally at least on compound selected from diphenols or polyphenols having vicinal OM groups, it being possible, if required, for the vicinal OH groups to be protected as acetal or ketal, as component Ac, and (4) at least one amino compound as component Ad, and where, in components Ab and Ac, M, in each case independently of one another, are hydrogen or a cation, or a divalent or polyvalent cation, if negative charges sufficient for compensation are present.