Patent ID: 7910640

Claim:
A polycondensation product that is a reaction product consisting of: A) an aromatic or heteroaromatic compound having from 5 to 10 carbon atoms, wherein in the heteroaromatic compound some of the carbon atoms, are replaced by heteroatoms, and which contain, on average, from at least 1 to 300 of at least one of an oxyethylene and an oxypropylene group per molecule which are bound via an O or N atom to said aromatic or heteroaromatic compound; and B) at least one aromatic compound selected from the group consisting of a phenol, a phenol ether, a naphthol, a naphthol ether, an aniline and a furfuryl alcohol, or an aminoplastic former selected from the group consisting of a melamine, a melamine derivative, urea, a urea derivative, and a carboxamide, or a combination thereof; and C) at least one an aldehyde selected from the group consisting of formaldehyde, glyoxylic acid and benzaldehyde, wherein the benzaldehyde may optionally comprise acid groups of the formulae COOM a , SO 3 M a and PO 3 M a , wherein M is selected from the group consisting of H, an alkali metal or an alkaline earth metal, ammonium and an organic amine radical and a is ½, 1 or 2 and wherein the aromatic compound B) has substituents selected only from the group consisting of OH, NH 2 , OR 2 , NHR 2 , NR 2 R 2 , COOH, C 1 -C 4 -alkyl, PO 3 H 2 and OPO 3 H 2 , wherein the alkyl radicals may in optionally comprise phenyl or 4-hydroxyphenyl radicals and R 2 is a C 1 -C 4 -alkyl radical which may optionally comprise a substituent selected from the group consisting of OH, COOH, PO 3 H 2 and OPO 3 H 2 , and wherein if component A) or component B) comprises COOH, aldehyde component C) is glyoxylic acid.