Water soluble or dispersible film covered alkaline composition
First Claim
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1. A multidose alkaline cleaning article comprising:
- (a) a solid detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and
(b) a continuous multilayer polymeric film, dispersible or soluble in aqueous liquids, covering the solid detergent composition, said multilayer film comprising an inner alkaline pH stable and aqueous soluble film and an outer layer resistant to aqueous dissolution and effective in providing mechanical strength wherein said multilayer film remains mechanically stable and aqueous soluble or dispersible after exposure to the solid detergent composition.
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Abstract
The invention is an alkaline cleaning system which includes an alkaline detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution, and an alkali stable continuous polymeric film dispersible or soluble in aqueous liquids covering the detergent composition. The invention also includes methods of using the alkaline cleaning system by applying an aqueous diluent automatically (by machine) or manually through partial or complete dissolution of the film covered solid.
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Citations
55 Claims
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1. A multidose alkaline cleaning article comprising:
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(a) a solid detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and (b) a continuous multilayer polymeric film, dispersible or soluble in aqueous liquids, covering the solid detergent composition, said multilayer film comprising an inner alkaline pH stable and aqueous soluble film and an outer layer resistant to aqueous dissolution and effective in providing mechanical strength wherein said multilayer film remains mechanically stable and aqueous soluble or dispersible after exposure to the solid detergent composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 26)
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21. A multidose alkaline cleaning article comprising:
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(a) a solid detergent composition comprising from about 5 wt-% to 80 wt-% of an alkalinity source and having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and (b) a continuous multilayer polymeric film having at least a first inner alkaline stable and aqueous soluble layer and a second outer layer resistant to aqueous dissolution and effective in providing mechanical strength, said film is soluble or dispersible in aqueous liquids and covers the solid detergent composition wherein said film remains aqueous soluble or dispersible and mechanically stable after extended exposure to the solid alkaline detergent. - View Dependent Claims (22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of using a multidose alkaline cleaning article comprising:
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(a) a solid detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and (b) a continuous multilayer polymeric film, dispersible or soluble in aqueous liquids, said multilayer film covering the solid detergent composition and multilayer film comprising an inner alkali pH stable and aqueous soluble film and an outer layer resistant to aqueous dissolution and effective in providing mechanical strength wherein said film remains aqueous soluble or dispersible and mechanically stable after exposure to the solid alkaline detergent, said method comprising the step of applying water to said article to dissolve or disperse a portion of said polymer film and to contact said solid detergent to create a use-dilution solution. - View Dependent Claims (44, 45, 46, 47, 49, 50, 51, 52, 54)
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48. A cleaning system comprising a dispenser and an alkaline cleaning article, said article comprising:
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(a) a solid detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and (b) a continuous multilayer polymeric film, dispersible or soluble in aqueous liquids, covering the solid detergent composition, said multilayer film comprising an inner alkali pH stable and aqueous soluble film and an outer layer resistant to aqueous dissolution and effective in providing mechanical strength wherein said multilayer film remains mechanically stable and aqueous soluble or dispersible after exposure to the solid detergent composition. - View Dependent Claims (53, 55)
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Specification