EP1239026B1 - Pastilles détergentes - Google Patents

Pastilles détergentes Download PDF

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Publication number
EP1239026B1
EP1239026B1 EP20020251321 EP02251321A EP1239026B1 EP 1239026 B1 EP1239026 B1 EP 1239026B1 EP 20020251321 EP20020251321 EP 20020251321 EP 02251321 A EP02251321 A EP 02251321A EP 1239026 B1 EP1239026 B1 EP 1239026B1
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EP
European Patent Office
Prior art keywords
tablet according
sodium
acid
detergent tablet
salt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP20020251321
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German (de)
English (en)
Other versions
EP1239026A1 (fr
Inventor
Huug c/o Lever Fabergé Europe - Dev.Centre Euser
Alan Digby c/o Lever Fabergé Europe Tomlinson
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Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority to EP20020251321 priority Critical patent/EP1239026B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3707—Polyethers, e.g. polyalkyleneoxides
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C11D17/0078—Multilayered tablets
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C11D17/0091—Dishwashing tablets
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40—Dyes ; Pigments
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/12—Carbonates bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/16—Phosphates including polyphosphates

Definitions

  • the present invention is in the field of detergent tablets. More specifically, the invention encompasses automatic dishwashing tablets, and the use thereof for cleaning utensils within a machine dishwasher.
  • Machine dishwashing tablets are popular with the consumer as they have several advantages over powdered products in that they do not require measuring, and they are compact and easy to store.
  • DE-A-199 37 428 discloses a two-phase cleaning tablet, in which both phases contain PEG 10000, sodium carbonate and dye.
  • the polyalkylene glycol is said to improve the moisture stability of the cleaning tablet.
  • WO00/52127 describes a process for producing multiphase articles such as detergent tablets, in which active substances are applied to the surface of the moulded article in solid, highly viscous or plastic form, and discloses a two-phase detergent tablet for washing machines or dishwashers, containing a liquid hydrocarbon ether (polyethylene glycol 400), a colouring agent and sodium carbonate or tripolyphosphate.
  • a liquid hydrocarbon ether polyethylene glycol 400
  • a colouring agent sodium carbonate or tripolyphosphate
  • GB 2 348 434 discloses granular or tabletted single phase compositions for improved fabric softness in the wash, in which PEG 4000, coloured speckles and sodium carbonate or tripolyphosphate are homogeneously distributed throughout the composition.
  • EP 0 922 756 discloses two-layer detergent tablets with a fast dissolution rate, in which PEG 1000 and PEG 7000 are evenly distributed between the two layers of the tablet.
  • WO99/07818 discloses a single-phase tablet for dental cleansing comprising colourant, polyethylene glycol and anhydrous sodium sulphite, tetrasodium pyrophosphate and sodium hexametaphosphate.
  • US 4 731 223 discloses a single-phase tablet or block for the automatic cleaning of toilet bowls comprising a colorant, polyethylene glycol and sodium pyrophosphate or sodium sulphate.
  • the present invention provides tablets which are aesthetically pleasing, in that they have a glossy appearance and are coloured.
  • the colour of the tablet does not fade on storage.
  • a detergent tablet having two or more phases, in which some, but not all of the phases comprise:
  • the tablets of the invention may be in any form suitable for addition to a washing or dish washer machine.
  • the colouring agent is a dye or a pigment; it is preferable if it is a dye.
  • compositions according to the invention are used for some but not all of the phases, such that different phases have different colours and different textures.
  • the tablet of the invention is a triple phase tablet, the phases being in the form of layers. It is highly preferable if the centre layer comprises the formulation of the invention, in that it comprises a solid hydrocarbon poly ether, a hydratable salt and a colouring agent.
  • the tablet has a strength of from 50 to 300 newtons (N) as measured on a MTS Synergie 100 using a loadcell of 500 N maximum capacity, the initial and secondary crosshead speeds being set at 25 mm/min, with a deformation limit of 200%.
  • the tablets of the invention preferably have a mass of greater than 8g, more preferably from 12g to 30g, most preferably 15g to 27g. Tablets with a mass of 20g, 22g or 25g are particularly useful.
  • the tablets are prepared from dense powder. If the tablet has a plurality of layers, it is preferred if each of the layers are compacted in a mould. When the final layer is added, compaction pressure is applied to the entire tablet.
  • the solid hydrocarbon ether used in the tablets of the present invention has a softening or melting temperature above 25°C, preferably at least 35°C. Preferably the melting temperature is not greater than 80°C.
  • the solid hydrocarbon polyether is an alkoxylated alkyl ether; particularly desirable are polyethylene glycols.
  • Polyethylene glycols having a molecular weight from 1500 to 10,000 are preferred, more preferably 3000 to 8000.
  • the total level of solid hydrocarbon polyether in the tablet is from 5 wt% to 20 wt% of the total weight of the tablet, more preferably from 7 wt% to 15 wt%. of the total weight of the tablet.
  • the solid hydrocarbon is present in the multiphase tablet with at least 90 wt% of the solid hydrocarbon poly ether in a single phase.
  • the tablet is a triple layer tablet, it is preferable if the ratios cited in the preceding sentence apply to the middle layer.
  • hydratable salt it is meant that the salt is in a state in which it may absorb additional water by hydration. That is to say that the salt is present either in its anhydrous form, or in a partially hydrated form.
  • the hydratable salt is preferably particulate in nature and may, for example, be alkali metal carbonate, bicarbonate, (poly) phosphate, citrate (anhydrous) or sulfate. Mixtures of two or more hydratable compounds may also be used, but preferably sodium tripolyphosphate is used.
  • compositions of the invention preferably comprise a water-soluble phosphate; typically this phosphate is contained at a level of from 1% to 90% by weight, preferably from 10% to 80% by weight, most preferably from 20% to 80% by weight of the composition.
  • water-soluble phosphates are the alkali metal tripolyphosphates, sodium, potassium and ammonium pyrophosphate, sodium and potassium orthophosphate, sodium polymeta phosphate in which the degree of polymerization ranges from about 6 to 21, and salts of phytic acid. Sodium or potassium tripolyphosphate is most preferred.
  • sodium tripolyphosphate with high Phase I Content is used.
  • Sodium tripolyphosphate with high Phase I can be prepared by heating to above the transition temperature at which phase II anhydrous sodium polyphosphate is transformed into the phase I form.
  • a process for the manufacture of particles containing a high proportion of the phase I form of sodium tripolyphosphate by spray drying below 420°C is given in US-A-4536377.
  • Suitable material is commercially available. Suppliers include Rhodia, Courbevoie, France and Albright & Wilson, Warley, West Midlands, UK.
  • the sodium tripolyphosphate should be partially hydrated, but the phase I anhydrous form should also be present.
  • the sodium tripolyphosphate in the particles may incorporate up to 5% (by weight of the sodium tripolyphosphate in these particles) of water of hydration.
  • the extent of hydration is desirably from 1% to 4% or 5% by weight. This degree of hydration in general means that the sodium tripolyphosphate is partially hydrated.
  • the sodium tripolyphosphate in these particles is preferably hydrated by a process which leads to a homogeneous distribution of the water of hydration within the tripolyphosphate.
  • the bulk density of the of sodium tripolyphosphate particles is preferably 0.75 kg/litre or less, more preferably from 0.52 to 0.72 kg/litre.
  • the particles which contain or consist of sodium tripolyphosphate preferably have a small mean particle size, such as not over 300 ⁇ m, better not over 250 ⁇ m. Small particle size can if necessary be achieved by grinding.
  • Rhodiaphos HPA 3.5 is a grade of sodium tripolyphosphate from Rhodia which has been found to be particularly suitable. It consists of porous particles of small particle size (mean size below 250 ⁇ m) with 70% phase I and prehydrated with 3.5% water of hydration.
  • the said particles contain sodium tripolyphosphate with more than 40% of phase I material.
  • a further preferred embodiment is a mixture of phase II and phase I sodium tripolyphosphate, preferably in the ratio of 6:4 to 4:6 of phase I to phase II.
  • compositions of the invention may contain a non-hydratable builder in addition to the hydratable salt.
  • the ratio of hydratable salt to non-hydratable builder is at least 2:1, more preferably 3:1.
  • non-hydratable builder is present in a separate phase to the solid hydrocarbon polyether, especially if the solid hydrocarbon polyether is a polyethylene glycol.
  • the non-hydratable builder is preferably present from 1% to 50% by weight, more preferably from 5% to 30% by weight of the composition.
  • Suitable examples of non-phosphorus containing inorganic builders include water-soluble alkali metal, borates, and silicates, including layered silicates such as SKS-6 ex. Hoechst, metasilicates, crystalline and amorphous aluminosilicates, and silicates including layered silicates and zeolites.
  • Organic detergent builders can also be used as nonphosphate builders in the present invention.
  • organic builders include alkali metal citrates, succinates, malonates, fatty acid sulfonates, fatty acid carboxylates, nitrilotriacetates, oxydisuccinates, alkyl and alkenyl disuccinates, oxydiacetates, carboxymethyloxy succinates, ethylenediamine tetraacetates, tartrate monosuccinates, tartrate disuccinates, tartrate monoacetates, tartrate diacetates, oxidized starches, oxidized heteropolymeric polysaccharides, polyhydroxysulfonates, polycarboxylates such as polyacrylates, polymaleates, polyacetates, polyhydroxyacrylates, polyacrylate/polymaleate and polyacrylate/ polymethacrylate copolymers, acrylate/maleate/vinyl alcohol terpolymers, aminopolycarboxylates and polyacetal carboxylate
  • Such carboxylates are described in U.S. Patent Nos. 4,144,226, 4,146,495 and 4,686,062.
  • Alkali metal citrates, nitrilotriacetates, oxydisuccinates, acrylate/maleate copolymers and acrylate/maleate/vinyl alcohol terpolymers are especially preferred nonphosphate builders.
  • the composition optionally comprises alkali metal silicates.
  • the SiO 2 level should be from 1% to 25%, preferably from 2% to 20%, more preferably from 3% to 10%, based on the weight of the ADD.
  • the alkali metal silicate is hydrous, having from 15% to 25% water, more preferably, from 17% to 20%.
  • the highly alkali metasilicates can in general be employed, although the less alkaline hydrous alkali metal silicates having a SiO 2 :M 2 0 ratio of from 2.0 to 2.4 are, as noted, greatly preferred.
  • Anhydrous forms of the alkali metal silicates with a SiO 2 :M 2 0 ratio of 2.0 or more are also less preferred because they tend to be significantly less soluble than the hydrous alkali metal silicates having the same ratio.
  • Sodium and potassium, and especially sodium silicates are preferred.
  • Enzymes may be present in the compositions of the invention.
  • enzymes suitable for use in the cleaning compositions of this invention include lipases/peptidases, amylases (amylolytic enzymes) and others which degrade, alter or facilitate the degradation or alteration of biochemical soils and stains encountered in cleansing situations so as to remove more easily the soil or stain from the object being washed, or to make the soil or stain more removable in a subsequent cleansing step. Both degradation and alteration can improve soil removal.
  • the enzymes most commonly used in machine dishwashing compositions are amylolytic enzymes.
  • the composition of the invention also contains a proteolytic enzyme. Enzymes may be present in a weight percentage amount of from 0.2% to 5% by weight.
  • amylolytic enzymes the final composition will have amylolytic activity of from 10 2 to 10 6 Maltose units/kg.
  • proteolytic enzymes the final composition will have proteolytic enzyme activity of from 10 6 to 10 9 Glycine Units/kg.
  • Bleach material may optionally and preferably be incorporated in composition for use in processes according to the present invention. These materials may be incorporated in solid form or in the form of encapsulates, and less preferably in dissolved form.
  • the level of bleach material is preferably greater than 0.5 wt% of a bleaching material.
  • the bleach material may be a chlorine or bromine releasing agent, or a peroxygen compound. Peroxygen based bleach materials are however preferred.
  • peroxyacids usable in the present invention are solid and, preferably, substantially water-insoluble compounds.
  • substantially water-insoluble is meant herein a water-solubility of less than about 1% by weight at ambient temperature.
  • peroxyacids containing at least 7 carbon atoms are sufficiently insoluble in water for use herein.
  • Inorganic peroxygen-generating compounds are also is typically used as the bleaching material of the present invention.
  • these materials are salts of monopersulphate, perborate monohydrate, perborate tetrahydrate, and percarbonate.
  • Monoperoxy acids useful herein include alkyl peroxy acids and aryl peroxyacids such as peroxybenzoic acid, and ring-substituted peroxybenzoic acids (e.g. peroxy-alpha-naphthoic acid); aliphatic and substituted aliphatic monoperoxy acids (e.g. peroxylauric acid and peroxystearic acid); and phthaloyl amido peroxy caproic acid (PAP).
  • alkyl peroxy acids and aryl peroxyacids such as peroxybenzoic acid, and ring-substituted peroxybenzoic acids (e.g. peroxy-alpha-naphthoic acid); aliphatic and substituted aliphatic monoperoxy acids (e.g. peroxylauric acid and peroxystearic acid); and phthaloyl amido peroxy caproic acid (PAP).
  • PAP phthaloyl amido peroxy caproic acid
  • diperoxy acids useful herein include alkyl diperoxy acids and aryldiperoxy acids, such as 1,12-diperoxydodecanedioic acid (DPDA); 1,9-diperoxyazelaic acid, diperoxybrassylic acid, diperoxysebacic acid and diperoxy-isophthalic acid; and 2-decyldiperoxybutane-1, 4-dioic acid.
  • DPDA 1,12-diperoxydodecanedioic acid
  • 1,9-diperoxyazelaic acid diperoxybrassylic acid, diperoxysebacic acid and diperoxy-isophthalic acid
  • 2-decyldiperoxybutane-1, 4-dioic acid 2-decyldiperoxybutane-1, 4-dioic acid.
  • Peroxyacid bleach precursors are well known in the art.
  • N,N,N',N'-tetraacetyl ethylene diamine TAED
  • SNOBS sodium nonanoyloxybenzene sulphonate
  • SBOBS sodium benzoyloxybenzene sulphonate
  • SPCC cationic peroxyacid precursor
  • a bleach catalyst such as the manganese complex, e.g. Mn-Me TACN, as described in EP-A-0458397, or the sulphonimines of US-A-5,041,232 and US-A-5,047,163, is to be incorporated, this may be presented in the form of a second encapsulate separately from the bleach capsule or granule. Cobalt catalysts can also be used.
  • suitable reactive chlorine- or bromine-oxidizing materials are heterocyclic N-bromo and N-chloro imides such as trichloroisocyanuric, tribromoisocyanuric, dibromoisocyanuric and dichloroisocyanuric acids, and salts thereof with water-solubilizing cations such as potassium and sodium.
  • Hydantoin compounds such as 1,3-dichloro-5,5-dimethyl-hydantoin are also quite suitable.
  • Particulate, water-soluble anhydrous inorganic salts are likewise suitable for use herein such as lithium, sodium or calcium hypochlorite and hypobromite.
  • Chlorinated trisodium phosphate and chloroisocyanurates are also suitable bleaching.materials.
  • Encapsulation techniques are known for both peroxygen and chlorine bleaches, e.g. as described in US-A-4,126,573, US-A-4,327,151, US-A-3,983,254, US-A-4,279,764, US-A-3,036,013, EP-A-0,436,971 and EP-A-0,510,761.
  • encapsulation techniques are particularly useful when using halogen based bleaching systems.
  • the bleach and the bleach catalyst is in a separate phase to the colouring agent.
  • a surfactant system comprising a surfactant selected from nonionic, anionic, cationic, ampholytic and zwitterionic surfactants and mixtures thereof is preferably present in the composition.
  • the surfactant is present in an amount of from 0.1 to 5% by weight.
  • the surfactant is a low- to non-foaming nonionic surfactant, which includes any alkoxylated nonionic surfactant wherein the alkoxy moiety is selected from ethylene oxide, propylene oxide and mixtures thereof, and is preferably used to improve the detergency without excessive foaming.
  • an excessive proportion of nonionic surfactant should be avoided.
  • an amount of 15% by weight or lower, preferably 10% by weight or lower, more preferably 7% by weight or lower, and preferably 0.1% by weight or higher, more preferably 0.5% by weight or higher, most preferably 1% by weight or higher is used.
  • nonionic surfactants for use in the invention are the low- to non-foaming ethoxylated straight-chain alcohols of the Plurafac® RA series, supplied by the Eurane Company; of the Lutensol® LF series, supplied by the BASF Company and of the Triton® DF series, supplied by the Rohm & Haas Company.
  • anionic surfactant may be used, but may require the additional presence of anti-foam to surpress foaming. If an anionic surfactant is used, it is advantageously present at levels of 2 wt% or below.
  • a water-soluble polymeric polycarboxylic compound is also advantageously present in the dish wash composition.
  • these compounds are homo- or co-polymers of polycarboxylic compounds, especially co-polymeric compounds in which the acid monomer comprises two or more carboxyl groups separated by not more than two carbon atoms. Salts of these materials can also be used.
  • Particularly preferred polymeric polycarboxylates are co-polymers derived from monomers of acrylic acid and maleic acid.
  • the average molecular weight of these polymers in the acid form preferably ranges from 4,000 to 70,000.
  • polymeric polycarboxylic compounds suitable for use in the composition of the invention are homopolymeric polycarboxylic acid compounds with acrylic acid as the monomeric unit.
  • the average weight of such homopolymers in the acid form preferably ranges from 1,000 to 100,000 particularly from 3,000 to 10,000.
  • Acrylic sulphonated polymers as described in EP 851 022 (Unilever) are also suitable.
  • this polymeric material is present at a level of at least 0.1%, more preferably at levels from 1 wt% to 7 wt% of the total composition.
  • a chelating agent may be present in the composition. If present, it is preferable if the level of chelating agent is from 0.5% to 3wt% of the total composition.
  • Preferred chelating agents include organic phosphonates, amino carboxylates, polyfunctionally-substituted compounds, and mixtures thereof.
  • Particularly preferred chelating agents are organic phosphonates such as ⁇ -hydroxy-2 phenyl ethyl diphosphonate, ethylene diphosphonate, hydroxy 1,1-hexylidene, vinylidene 1,1 diphosphonate, 1,2 dihydroxyethane 1,1 diphosphonate and hydroxy-ethylene 1,1 diphosphonate. Most preferred is hydroxy-ethylene 1,1 diphosphonate (EHDP).
  • Anti-tarnishing agents such as benzotriazole and those described in EP 723 577 (Unilever) may also be included.
  • Optional ingredients are, for example, buffering agents, reducing agents, e.g., borates, alkali metal hydroxide and the well-known enzyme stabilisers such as the polyalcohols, e.g. glycerol and borax; anti-scaling agents; crystal-growth inhibitors, threshold agents; thickening agents and perfumes.
  • buffering agents reducing agents, e.g., borates, alkali metal hydroxide and the well-known enzyme stabilisers such as the polyalcohols, e.g. glycerol and borax; anti-scaling agents; crystal-growth inhibitors, threshold agents; thickening agents and perfumes.
  • Reducing agents may e.g. be used to prevent the appearance of an enzyme-deactivating concentration of oxidant bleach compound.
  • Suitable agents include reducing sulphur-oxy acids and salts thereof.
  • Most preferred for reasons of availability, low cost, and high performance are the alkali metal and ammonium salts of sulphuroxy acids including ammonium sulphite ((NH 4 ) 2 SO 3 ), sodium sulphite (Na 2 SO 3 ) sodium bisulphite (NaHSO 3 ), sodium metabisulphite (Na 2 S 2 O 3 ) potassium metabisulphite (K 2 S 2 O 5 ), lithium hydrosulphite (Li 2 S 2 O 4 ), with sodium sulphite being particularly preferred.
  • Another useful reducing agent is ascorbic acid.
  • the amount of reducing agents to be used may vary from case to case depending on the type of bleach and the form it is in, but normally a range of 0.01% to 1.0% by weight, preferably from 0.02% to 0.5% by weight, will be sufficient.
  • the pH of the wash liquor at ambient temperature is higher than 6.5, more preferably 7.5 or higher, most preferably 8.5 or higher.
  • the pH is lower than 12, more preferably lower than 11.
  • Example 1 A three layer tablet for machine dishwashing.
  • a particulate composition for matte surfaced regions was prepared by mixing the following ingredients :
  • a uncoloured (white) particulate composition was prepared by mixing the following ingredients: Wt% Sodium tripolyphosphate (partially hydrated) 56 Na-disilicate 9 Nonionic detergent 6 Na-perborate 16 TAED 3 Manganese catalyst 1.1 Sodium polyacrylate 3.7 Enzymes 4.5 Minors To 100
  • Example 1 A particulate composition for making glossy-sufaced coloured regions was made by mixing the following ingredients: Example 1 Example A Wt% Wt% Polyethylene glycol 4000 47.5 47.5 Sodium tripolyphosphate (partially hydrated) 47.5 0 Sodium citrate hydrate 0 47.5 Heavy metal sequestrant 2.5 2.5 Green dye solution (4% dye) 2.5 2.5
  • Example A provides a comparative example.
  • the tablet had identical top and bottom layer of the first composition. Sandwiched between them was a thin middle layer of the second coloured composition.
  • Example A On storage at ambient temperature for one month the coloured layer in Example A faded, the coloured layer in Example 1 did not.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Claims (15)

  1. Pastille détergente ayant deux phases ou plus, dans laquelle certaines des phases, mais pas toutes, comprennent :
    a) un polyéther hydrocarboné solide,
    b) un agent de coloration et ;
    c) un acide hydratable ou un sel de celui-ci, et dans laquelle au moins 90 % du polyéther hydrocarboné solide est dans une phase unique.
  2. Pastille détergente selon la revendication 1, dans laquelle le polyéther hydrocarboné solide est un alkyléther alcoxylé.
  3. Pastille détergente selon la revendication 1 ou la revendication 2, dans laquelle le polyéther hydrocarboné solide est un polyéthylèneglycol.
  4. Pastille détergente selon l'une quelconque des revendications précédentes, dans laquelle le polyéthylèneglycol a un poids moléculaire de 3000 à 8000.
  5. Pastille détergente selon l'une quelconque des revendications précédentes, dans laquelle l'acide hydratable ou un sel de celui-ci est sous une forme anhydre ou partiellement hydratée.
  6. Pastille détergente selon l'une quelconque des revendications précédentes, dans laquelle le sel hydratable est un carbonate, un bicarbonate, un phosphate ou un polyphosphate ou un citrate ou un sulfate d'un métal alcalin.
  7. Pastille détergente selon l'une quelconque des revendications précédentes, comprenant un phosphate hydrosoluble.
  8. Pastille détergente selon la revendication 7, dans laquelle le phosphate hydrosoluble est un tripolyphosphate d'un métal alcalin, un pyrophosphate de sodium, de potassium ou d'ammonium, un orthophosphate de sodium ou de potassium, un polymétaphosphate de sodium dans lequel le degré de polymérisation est compris dans la gamme de 6 à 21, ou un sel de l'acide phytique.
  9. Pastille détergente selon l'une quelconque des revendications précédentes, dans laquelle l'acide hydratable ou un sel de celui-ci est le tripolyphosphate de sodium.
  10. Pastille détergente selon l'une quelconque des revendications précédentes ayant trois phases, dans laquelle les phases sont sous la forme de couches.
  11. Pastille détergente selon la revendication 10, dans laquelle la couche centrale de la pastille contient le polyéther hydrocarboné solide, l'agent de coloration et l'acide hydratable ou un sel de celui-ci.
  12. Pastille selon l'une quelconque des revendications précédentes, ayant une résistance de pastille de 50 à 300 newtons (N).
  13. Pastille selon l'une quelconque des revendications précédentes, ayant une masse supérieure à 8 g.
  14. Pastille selon l'une quelconque des revendications précédentes, comprenant de 0,1 à 5 % en poids d'un tensioactif.
  15. Utilisation d'une pastille selon l'une quelconque des revendications précédentes pour nettoyer des ustensiles dans un lave-vaisselle.
EP20020251321 2001-03-05 2002-02-26 Pastilles détergentes Revoked EP1239026B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20020251321 EP1239026B1 (fr) 2001-03-05 2002-02-26 Pastilles détergentes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01301983 2001-03-05
EP01301983 2001-03-05
EP20020251321 EP1239026B1 (fr) 2001-03-05 2002-02-26 Pastilles détergentes

Publications (2)

Publication Number Publication Date
EP1239026A1 EP1239026A1 (fr) 2002-09-11
EP1239026B1 true EP1239026B1 (fr) 2005-11-02

Family

ID=26077099

Family Applications (1)

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EP20020251321 Revoked EP1239026B1 (fr) 2001-03-05 2002-02-26 Pastilles détergentes

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EP (1) EP1239026B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0514004D0 (en) * 2005-07-08 2005-08-17 Reckitt Benckiser Nv Article and method
GB0514007D0 (en) * 2005-07-08 2005-08-17 Reckitt Benckiser Nv Article and method
GB0513997D0 (en) * 2005-07-08 2005-08-17 Reckitt Benckiser Nv Article and method
GB0514001D0 (en) * 2005-07-08 2005-08-17 Reckitt Benckiser Nv Article and method
WO2010022775A1 (fr) * 2008-08-27 2010-03-04 Symrise Gmbh & Co. Kg Article de nettoyage multicolore

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548682B1 (fr) * 1983-07-08 1985-11-08 Lesieur Cotelle Composition pour le nettoyage automatique des cuvettes de wc
AU726779B2 (en) * 1997-08-05 2000-11-23 Coltene/Whaledent Inc. Ultrasonic dental cleansing tablet
GB2331994A (en) * 1997-12-02 1999-06-09 Procter & Gamble Detergent tablet
AU3159300A (en) * 1999-03-03 2000-09-21 Henkel Kommanditgesellschaft Auf Aktien Method of preparing multi-phase moulded detergent and/or cleaning agent articles
GB2348434A (en) * 1999-04-01 2000-10-04 Procter & Gamble Detergent compositions
DE19937428A1 (de) * 1999-08-07 2001-02-08 Henkel Kgaa Reinigungs- und Waschmittelformkörper

Also Published As

Publication number Publication date
EP1239026A1 (fr) 2002-09-11

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