The invention relates to a powdery or granulated composition comprising at least by 30% by weight of a mixture of (a) a copolymer composed of polymerized units of C1- to C4-alkyl esters of acrylic or methacrylic acid and of alkyl(meth)acrylate monomers with a tertiary amino group in the alkyl radical and (b) 5 to 28% by weight based on (a) of a salt of a fatty monocarboxylic acid having 10 to 18 carbon atoms, and (c) 10 to 30% by weight based on (a) of fatty monocarboxylic acid having 8 to 18 carbon atoms and/or a fatty alcohol having 8 to 18 carbon atoms.
