The present invention relates to a rheology modifier obtainable by polymerizing (i) at least one ethylenically unsaturated carboxylic acid； (ii) optionally at least one nonionic ethylenically unsaturated surfactant monomer, (iii) at least one C1-C2-alkyl methacrylate, and/or (iv) at least one C2-C4-alkyl acrylate, where the alkyl chain length averaged over the number of alkyl groups of the alkyl acrylate is 2.1 to 4.0； in the presence of hydrocarbon comprising at least one XH-group, wherein X is selected from the group consisting of O, P, N and S. Further aspects of the invention are liquid formulations and especially particles containing liquid detergents comprising said rheology modifier.
