A phosphate-free detergent formulation for machine dishwashing, comprising, as components:
- a) from 1 to 20% by weight of a mixture of hydrophobically modified polycarboxylates a1) and hydrophilically modified polycarboxylates a2), comprising
- a1) from 5 to 95% by weight of hydrophobically modified polycarboxylates I formed from
- a11) from 20 to 80 mol % of at least one monomer from the group consisting of maleic acid, maleic anhydride and acrylic acid,
- a12) from ≧0 to 80 mol % of at least one monomer selected from the group consisting of isobutene, diisobutene and styrene, and
- a13) from ≧0 to 20 mol % of at least one further monomer selected from the group consisting of 1-dodecene, 1-octadecene, C22-alpha-olefin, a mixture of C20-C24-alpha-olefins and polyisobutene having an average of from 12 to 100 carbon atoms, and
- a2) from 5 to 95% by weight of hydrophilically modified polycarboxylates II formed from
- a21) from 55 to 90 mol % of acrylic acid and/or of a water-soluble salt of acrylic acid,
- a22) from 5 to 40 mol % of a further acidic monomer and/or of a water-soluble salt thereof, and
- a23) from 1 to 15 mol % of at least one nonionic monomer of the general formula (II)
- in which the variables are each defined as follows:
- R5 is hydrogen or methyl,
- Z is —C(O)O;
- R6 are identical or different, unbranched or branched C2-C4-alkylene radicals;
- R7 is unbranched or branched C1-C6-alkyl;
- n is from 3 to 50,
- where the sum of a1) and a2) adds up to 100% by weight,
- b) from 0 to 50% by weight of complexing agents,
- c) from 0.1 to 20% by weight of low-foam nonionic surfactants,
- d) from 0.1 to 30% by weight of bleaches and optionally bleach activators,
- e) from 0 to 60% by weight of further builders,
- f) from 0 to 8% by weight of enzymes, and
- g) from 0 to 50% by weight of one or more further additives, selected from anionic or zwitterionic surfactants, bleach catalysts, alkali carriers, corrosion inhibitors, defoamers, dyes, fragrances, fillers, organic solvents and water,
- where the sum of components a) to g) adds up to 100% by weight.