Patent ID: 8389460

Claim:
A detergent composition for clothes, which is phosphate-free and surfactant-free but includes a washing component comprising: A) an organic chelating agent which is an organic alkaline chelating agent or a sodium salt of the organic chelating agent as a substance having a hardness component trapping ability selected from the group consisting of: 1) Methyl Glycine Diacetic Acid (MGDA), 2) Dicarboxymethyl Glumatic Acid (GLDA), 3) Aspartate Diacetic Acid (ASDA), 4) Ethylenediamine Disuccinic Acid (EDDS), 5) Hydroxy Iminodisuccinic Acid (HIDS), 6) Iminodisuccinic Acid (IDS), or mixtures thereof; B) an anti-soil redeposition agent that prevents resoiling of hydrophilic fibers and hydrophobic fibers, which is a water-soluble polymer substance of a non-ionic system including at least one species selected from the group consisting of an acetyl group, a methoxy group, a hydroxypropyl group, a poly-oxy propylene group, or mixtures thereof as the hydrophobic group, and including a hydroxyl group as the hydrophilic group; and wherein, when the detergent composition is dissolved in a concentration of 0.5 to 10.5 g/L, the washing liquid meets the following criteria: i) the washing liquid has a pH of 9 to 11 provided by at least one of the organic chelating agent and an alkaline buffer; and ii) more than enough organic chelating agent, or combination of the organic chelating agent and the alkaline buffer having a hardness component trapping ability exists within the washing liquid such that the concentration of a hardness component within the washing liquid is 10 ppm or less; and the washing liquid further includes an oxy-based bleaching agent.