Patent ID: 7595416

Claim:
A phosphoric acid ester and salts thereof of the general formula I, wherein A is a monohydroxyl residue derived from C 1 -C 20 -alkyl-(AO)x-OH or Acyl-(AO)x-OH; or C 1 -C 20 -alkyl-(AO)x-(HA)y-OH or Acyl-(AO)x-(HA)y-OH; or C 1 -C 20 -alkyl-(AO)x-(AA-AO)y-OH or Acyl-(AO)x-(M-AO)y-OH; or MO-(HA)y-OH or MO-(AA-AO)y-OH; wherein Acyl is an aromatic carboxylic acid residue or a saturated or unsaturated fatty acid residue; AO is a polyC 2 -C 4 alkyleneglycol residue, HA is a hydroxycarboxylic acid or a lactone thereof, AA is a dicarboxylic acid, MO is a monoalcohol, x is 1 to 250, y is 1 to 250, B is a mono-, di-, tri- or polyhydroxy di-, tri- or multi-carboxylic acid residue which is linked via the hydroxy group to the phosphoric acid and via one of the carboxylic acid groups to the monohydroxyl residue [A], the remaining carboxylic acid group(s) is/are free or is/are esterified with a further monohydroxyl residue [A], resulting in branched esters; n is 1-2; m is 1-4.