Detergents

A phosphate-free automatic dishwashing agent comprising a builder, a bleaching agent, a nonionic surfactant, and:

• a) a copolymer comprising:
• i) 50% to 95% by weight of a monomer containing a sulfonic acid group;
• ii) a monomer of the general formula R1(R2)C═C(R3)—X—R4, in which R1 and R2 are —H, R3 is —H or —CH3, X is —C(O)O—, and R4 denotes a straight-chain or branched saturated alkyl residue with 2 to 22 carbon atoms or denotes an unsaturated, optionally aromatic residue with 6 to 22 carbon atoms;
• and
• iii) a mono- or polyunsaturated carboxylic acid monomer;
• and
• b) methylglycinediacetic acid,
• wherein the nonionic surfactant is of the general formula:
• R1O[CH2CH2O]x[CH2 CH(R3)O]yCH2CH(OH)R2,
• in which
• R1and R2 mutually independently are selected from a linear or branched, saturated or mono- or polyunsaturated hydrocarbon residue with 2 to 26 carbon atoms, R3 is mutually independently selected from —CH2CH2—CH3,and —CH(CH3)2 , and the indices x and y mutually independently are selected from 1 to 32.