Patent ID: 8841382

Claim:
An amphiphile of the formula (I) where R 1 : each independently H, C 1 -C 10 -alkyl, —SO 3 —, —PO 3 2− , —COO − , —R′—PO 3 2− , or —R′—CO 2 —, where R′ is C 1 -C 12 -alkylene; R 2 : each independently C 2 -C 5 -alkylene, wherein at least 50 mol % of C 2 -alkylene is present in respect of R 2 ; n: 1 to 200; m: 2 to 6; q: 0 to 50; R p : a nonpolar polymer R np wherein said R np is NPa or NPb and wherein NPa is —C(O)(CHR a ) 2 —CO 2 H, where R a is independently H, C 4 -C 44 -alkyl, C 4 -C 44 -alkenyl, C 6 -C 44 -aryl, C 7 -C 44 -aralkyl or C 7 -C 44 -alkylaryl, and wherein at most one of the two R a radicals is hydrogen; and NPb is —C(O)(CHR b ) 2 —CO 2 H, wherein R b is independently hydrogen or a poly(C 2 -C 12 -alkylene) group, which may optionally comprise at least one carboxylic acid group, a carboxylic anhydride group or an R d radical bonded via a carboxylic ester group and wherein at most one of the two R b radicals is hydrogen; and R d : a nonpolar dendron R nd .