Claims
- 1. An aqueous based fluid automatic dishwashing composition comprising:
- (a) a thickening system comprising a water soluble polystyrene sulfonated polymer or a polystyrene sulfonated copolymer, the polymer or copolymer having an acid number of greater than about 120, a swellable clay, and optionally a water soluble multivalent cation;
- (b) a sufficient level of a source of available chlorine to produce at least about 0.5% thereof;
- (c) a sufficient amount of an alkaline source to produce a pH of at least about 10.5; and
- (d) a builder;
- said composition being characterized by exhibiting thixotropic behavior, by having a viscosity of at least 0.1 to 20 pascal seconds at 25.degree. C. and 5 s.sup.-1, and having an available chlorine level of at least about 0.5% by weight after about six weeks storage at 25.degree. C.
- 2. A composition as defined in claim 1 wherein said copolymer is a water soluble copolymer of styrenesulfonic acid or salts thereof and a C.sub.1-18 alkyl ester of acrylic or methacrylic acid.
- 3. A composition as defined in claim 1 wherein said clay is selected from the group consisting of montmorillonites, hectorites, nontronites, beidillites, saponites, sauconites and mixtures thereof.
- 4. A composition as defined in claim 1 wherein said optional multivalent cation is selected from the group consisting of A1.sup.+3, Zn.sup.+2, Sn.sup.+4 and mixtures thereof.
- 5. A composition as defined in claim 1 wherein said source of available chlorine is alkali metal or alkaline earth metal hypochlorites.
- 6. A composition as defined in claim 1 wherein said alkaline source is selected from the group consisting of alkali or alkaline earth metal hydroxides, alkali metal silicates and mixtures thereof.
- 7. A composition as defined in claim 1 wherein said builder is selected from the group consisting of alkali metal phosphate alkali metal carbonate and mixtures thereof.
- 8. A method for cleaning dishes comprising contacting said dishes with a 0.1% to 1.0% aqueous solution of the composition of claim 1.
- 9. An article of manufacture comprising the composition of claim 1 disposed in a container with a reclosable dispensing orifice of 6 mm to 12 mm in axial length.
- 10. A composition as defined in claim 1 which comprises an amount of up to 3% by weight of a source of the water-soluble multivalent cation.
- 11. A composition as defined in claim 10 wherein said multivalent cation is selected from the group consisting of A1.sup.+3, Zn.sup.+2, Sn.sup.+4 and mixtures thereof.
- 12. A composition as defined in claim 11 wherein the source of the aluminum zinc or tin ions is a chloride or sulphate salt thereof.
- 13. A composition according to claim 10 wherein the source of the aluminum zinc and tin ions is a present in an amount of from 0.01 to 1% by weight of the composition.
Parent Case Info
This is a continuation application of Ser. No. 379,403, filed Jul. 13, 1989, now abandoned.
US Referenced Citations (7)
Non-Patent Literature Citations (1)
Entry |
Weiss, R. A. et al., Journal of Polymer Science; Polymer Chemistry Edition, vol. 23, pp. 525-533--Attachment 1 and pp. 549-568--Attachment 2 (1985). |
Continuations (1)
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Number |
Date |
Country |
Parent |
379403 |
Jul 1989 |
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