Patent ID: 7956013

Claim:
A composition comprising: (A) at least one surfactant of the general formula (I) (R 1 —[(O—(CH 2 ) 2 ) x1 (O—CH(CH 3 )CH 2 ) x2 ]O) k P(═O)(OH) 3-k (I) wherein the sequence of the alkyleneoxy units is arbitrary, each R 1 independently represents a moiety selected from the group consisting of linear and branched C 12 -C 22 -alkyl, C 2 -C 22 -alkenyl, C 12 -C 22 -alkynyl, (C 11 -C 21 -alkyl)carbonyl, (C 11 -C 21 -alkenyl)carbonyl and (C 11 -C 21 -alkynyl)carbonyl, k represents 1 or 2 and x1 and x2 each independently represent an integer of 0 to 20, the sum of x1 and x2 being a number of 1 to 20; and (B) at least one thickener comprising at least two hydrophobic groups R 2 which are linked to one another via a bridging hydrophilic group (a), wherein each R 2 , independently represents a moiety selected from the group consisting of C 8 -C 32 -alkyl, C 8 -C 32 -alkenyl, C 8 -C 32 -alkynyl, cycloalkyl, aryl, and aryl-C 1 -C 32 -alkyl, which in each case may have up to 3 hydroxyl substituents; wherein the composition has a viscosity which is pH-dependent.