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AUTOMATIC DISHWASHING COMPOSITION

20230042669 · 2023-02-09

    Inventors

    Cpc classification

    International classification

    Abstract

    An automatic dishwashing composition comprising polyepoxysuccinic acid (PESA) or derivatives thereof.

    Claims

    1. An automatic dishwashing composition comprising: polyepoxysuccinic acid (PESA) or derivatives thereof; one or more acrylic acid-sulphonic acid copolymers; and citric acid and/or a salt thereof.

    2. The composition according to claim 1, wherein the composition further comprises one or more acrylic acid-maleic acid copolymers.

    3. The composition according to claim 1, wherein the composition does not comprise methyl glycine diacetic acid (MGDA).

    4. The composition according to claim 1, comprising PESA in an amount of from 0.1 to 15% by weight, based on the total weight of the composition.

    5. (canceled)

    6. The composition according to claim 1, further comprising from 3 to 25% by weight of one or more nonionic surfactants, based on the total weight of the composition.

    7. The composition according to claim 6, wherein the one or more nonionic surfactants comprises a mixed alkoxylate fatty alcohol non-ionic surfactant, preferably comprising a greater number of moles of the lower alkoxylate group than of the higher alkoxylate group in the molecule.

    8. The composition according to claim 1, wherein the composition is contained in a water-soluble multi-compartment container.

    9. The composition according to claim 8, wherein the multi-compartment container comprises a composition in the form of a solid, liquid, gel or paste and at least one further composition in the form of a solid, liquid, gel or paste, preferably wherein the PESA is present in the solid composition.

    10. A method of automatic dishwashing comprising providing the composition as defined in claim 1 to an automatic dishwasher.

    11. A method of inhibiting soil redistribution comprising providing the composition as defined in claim 1.

    Description

    [0125] FIG. 1 demonstrates qualitatively the comparative visual result after 5 wash cycles employing the ‘Comparative Composition 5’ (left, cutlery items 1-3) and the ‘Inventive Composition 6’ (right, cutlery items 4-6).

    [0126] As demonstrated in both Table 6 and FIG. 1, a composition without a sulphonated copolymer results in a significant improvement in the levels of silver corrosion.

    [0127] Friability

    [0128] The Comparative and Inventive Compositions, in tablet form, were tested for friability after various time intervals (Table 7).

    TABLE-US-00007 TABLE 7 Comparative Inventive Composition 5 Composition 6 Avg. friability Avg. friability Time Conditions [% abrasion] [% abrasion] 0 weeks — 12 0.9 3 weeks 25° C./50% r.h. 20 0.7 40° C./75% r.h. 23 0.4 6 weeks 25° C./50% r.h. 20 0.7 40° C./75% r.h. 39 0.4 12 weeks  25° C./50% r.h. 31 0.7 40° C./75% r.h. 54 0.5

    [0129] Compositions according to the invention demonstrate a surprising reduction in the friability of the tablets.

    [0130] The invention is defined by the claims.