Cotelomer compounds

摘要

New cotelomer compounds having the formula I <IMAGE> (I) and salts thereof wherein A is a random polymeric residue comprising at least one unit of formula II <IMAGE> (II) and at least one unit of formula III, different from a unit of formula II, <IMAGE> (III) and B is hydrogen or a residue A; wherein m and n are integers such that the sum of m+n is an integer of from 3 to 100, the ratio of n:m being from 99 to 1:1 to 99, provided that the resulting telomers are water-soluble and wherein m and/or n in a residue A may be the same as or different from m and/or n in a residue B; R is hydrogen, methyl or ethyl; R1 is a residue -OX, wherein X is hydrogen, an alkali- or alkaline earth metal, ammonium or an amine residue; R2 is hydrogen, methyl or a residue -CO2R5, wherein R5 is hydrogen or a straight- or branched chain alkyl residue having 1 to 8 carbon atoms; R3 is hydrogen, a straight- or branched chain alkyl residue having 1 to 4 carbon atoms, hydroxymethyl or a residue -CO2R6, wherein R6 is hydrogen, a residue of formula <IMAGE> a residue of formula -[CH2-CH(R9)O]zH, in which R9 is hydrogen, methyl or phenyl and z is an integer from 1 to 20, or R6 is a straight- or branched chain alkyl residue having 1 to 8 carbon atoms or by a group SO3M in which M is hydrogen or an alkali- or alkaline earth metal atom; R4 is a residue -CO2R6 (wherein R6 has its previous significance), a straight- or branched alkyl residue having 1 to 8 carbon atoms optionally substituted by one to three carboxylic acid groups, a phenyl residue, an acetyl residue, hydroxymethyl, an acetomethyl residue, -SO3M, -CH2SO3M or -PO3M2, in which M is hydrogen or an alkali metal or alkaline earth metal atom, a residue -CONR7R8, wherein R7 and R8 are the same or different and each is hydrogen, a straight- or branched chain alkyl residue having 1 to 8 carbon atoms, hydroxymethyl or a residue -CH(OH)CO2M, -C(CH3)2CH2SO3M or -C(CH3)2CH2PO3M2, wherein M has its previous significance, or -N(R10)COCH3, in which R10 is hydrogen or C1-C4 straight or branched chain alkyl group. Compounds I are useful as corrosion and/or scale inhibitors in aqueous systems, as agents for facilitating dispersion of particulate matter in aqueous systems and as sealing smut inhibitors in processes for sealing anodically produced oxide layers on aluminium surfaces.