Cleaning agents

A phosphate-free automatic dishwashing agent comprising:

• a) from 10 to 50 wt. % of at least one of citric acid and a citrate salt;
• b) from 2 to 15 wt. % sodium percarbonate;
• c) from 2 to 10 wt. % of hydrophobically modified copolymer, said hydrophobically modified copolymer comprising:
• i. at least one of mono- and polyunsaturated sulfonic acid monomers;
• ii. at least one of mono- and polyunsaturated carboxylic acid monomers;
• and
• iii. monomers of the general formula:
• R1(R2)C═C(R3)—X—R4, wherein R1 to R3 are independently —H, —CH3 or —C2H5;
• X is an optional spacer group selected from the group —CH2—, —C(O)O—, and —C(O)—NH—;
• and R4 is selected from the group consisting of straight-chain saturated alkyl residues having 2 to 22 carbon atoms, branched saturated alkyl residues having 2 to 22 carbon atoms, and unsaturated alkyl residues having 6 to 22 carbon atoms, and mixtures thereof;
• d) from 4 to 14 wt. % of non-hydrophobically modified copolymer, said non-hydrophobically modified copolymer comprising:
• i. at least one of mono- and polyunsaturated sulfonic acid monomers;
• and
• ii. at least one of mono- and polyunsaturated carboxylic acid monomers;
• and
• e) from 1 to 7 wt. % nonionic surfactant, said nonionic surfactant having the general structure R1—CH(OH)CH2O-(AO)w-(A′O)x-(A″O)y-(A′″O)z—R2, in which R1 is a straight-chain or branched, saturated or mono- or polyunsaturated C6-24 alkyl or alkenyl residue;
• R2 is a linear or branched hydrocarbon residue with 2 to 26 carbon atoms;
• A, A′, A″ and A′″ are independently a residue from the group —CH2CH2, —CH2CH2—CH2, —CH2—CH(CH3), —CH2—CH2—CH2—CH2, —CH2—CH(CH3)—CH2—, —CH2—CH(CH2—CH3);
• and w, x, y and z are between 0.5 and 120 wherein any of x, y, and z are optionally 0.