EP1918360A1 - Agent de nettoyage dosé ou dosable - Google Patents

Agent de nettoyage dosé ou dosable Download PDF

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Publication number
EP1918360A1
EP1918360A1 EP06021294A EP06021294A EP1918360A1 EP 1918360 A1 EP1918360 A1 EP 1918360A1 EP 06021294 A EP06021294 A EP 06021294A EP 06021294 A EP06021294 A EP 06021294A EP 1918360 A1 EP1918360 A1 EP 1918360A1
Authority
EP
European Patent Office
Prior art keywords
washing agent
washing
agent
anyone
matrix
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.)
Withdrawn
Application number
EP06021294A
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German (de)
English (en)
Inventor
Rudolf Gitzi
Ivan Hübscher
Karin Kleeli
Hans Eggenschwiler
Hartmut Kilian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mifa AG Frenkedorf
Original Assignee
Mifa AG Frenkedorf
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mifa AG Frenkedorf filed Critical Mifa AG Frenkedorf
Priority to EP06021294A priority Critical patent/EP1918360A1/fr
Priority to EP07019771.0A priority patent/EP1911833B1/fr
Publication of EP1918360A1 publication Critical patent/EP1918360A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
    • 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

Definitions

  • the present invention relates to a cleaning agent in form of dosed pieces, in particular a cleaning agent for use in machines such as dishwashers, and washing machines, especially dosed pieces, wherein the stability of the enzymes and the bleaching system is secured by a specific composition and production method.
  • washing agent In dishwashers and washing machines, in general a predetermined amount of washing agent is needed to get the desired cleaning result.
  • the recommended amount is indicated on the package.
  • the result may be unsatisfactory or the environment may be unnecessarily burdened with excess agent.
  • pre-portioned washing agents e.g. tablets.
  • composition that can easily be formed into solid dosing units and that is storage stable, preferably also in humid environment, much preferred in humid and hot environment.
  • a suitable solid washing agent comprises a carrier and therein incorporated active substances, wherein said carrier is a solid, water-soluble matrix that is tight against water and humidity, dimensionally stable at intended washing temperatures, wherein said wash active substances at least comprise a builder, and wherein said washing agent is in the form of granules, beads or tablets.
  • washing agent encompasses surface cleaning agents, and in particular washing agents for dish washing and laundry.
  • surface cleaning agents and in particular washing agents for dish washing and laundry.
  • inventive agents can be used for any cleaning application where dosed or easily dosable forms are desired, preferably such forms that are also storage stable at least in humid environment.
  • problematic ingredients in solid dosable washing agents are in particular the enzymes and the bleaching system.
  • a washing agent of the present invention comprises a carrier and therein incorporated active substances, wherein said carrier is a solid, water-soluble matrix that is tight against water and humidity, wherein said washing agent is dimensionally stable at the highest temperature in the storage container during a washing cycle, wherein said wash active substances at least comprise a builder, and wherein said washing agent is in the form of tablets or granules or beads.
  • said highest temperature is in the range of about 70 to 80°C and said washing agent melts above at least 70 °C, preferably said washing agent melts above about 75°C, in particular at or above about 80°C, and preferably said matrix has a turbidity/cloud point of above about 18°C, preferably above 25°C.
  • washing agents are concerned that are intended for being stored outside the washing machine and dosed for each washing cycle, or washing agents that are especially designed for low temperature washing, the dimensional stability is less critical, i.e. needs only to be present at such low temperatures.
  • a matrix suitable for an inventive washing agent is obtainable from polymers selected from the group consisting of polyethylene glycols, polypropylene glycols, methoxypropylene glycols (M-PEGs), block copolymers thereof, or low-foaming non-ionic surfactants with a melting point above 40°C, in particular ethylene oxide (EO)/propylene oxide (PO) adducts, optionally in the presence of one or more further/other solid or liquid surfactants selected from the group of low-foaming non-ionic surfactants such as e.g.
  • one or more fatty alcohol alkoxylates one or more fatty alcohol ethylene oxide (EO)/propylene oxide (PO) adducts, one or more EO/PO block copolymers, one or more fatty alcohols such as stearyl alcohols, and/or one or more co-builders such as polycarboxylates, e.g. copolymers of acrylic acid and maleic acid.
  • EO fatty alcohol ethylene oxide
  • PO propylene oxide
  • co-builders such as polycarboxylates, e.g. copolymers of acrylic acid and maleic acid.
  • the average molecular weight of the polymers preferably forming the matrix and the optionally also present surfactants and co-builders each can vary in a broad scope, as long as a matrix is formed that together with the further ingredients results in the desired melting point of the washing agent and preferably also in the desired turbidity.
  • Preferred ranges of the average molecular weights of the preferred polymers, surfactants and preferred optional co-builders are: Compound Molecular Weight - polyethylene glycols 6000-35000 - polypropylene glycols 2000-4000 - methoxypropylene glycols (M-PEGs) 950-5600 - EO/PO adducts (e.g. Aduxol ® ) 1000-8000 - EO/PO block copolymers (e.g. Pluronic ® ) 1000-8000 - polycarboxylates about 70000
  • active substances namely at least one builder, preferably also at least one surfactant (in the case of dishwashing agents at least one low foaming non-ionic surfactant), and at least one enzyme.
  • the dishwashing agent may also comprise a combination of at least one low-foaming non-ionic surfactant and at least one cationic surfactant and/or at least one amphoteric surfactant.
  • anionic surfactants optionally in the presence of further surfactants, are preferred
  • An improved washing agent is obtained if it furthermore comprises at least one corrosion protecting agent, (for dishwashing agents e.g. a silver protecting agent), and bleaching agents.
  • dishwashing agents e.g. a silver protecting agent
  • bleaching agents e.g. a silver protecting agent
  • perfumes (fragrances) and/or coloring agents (dyes) may be added.
  • the size of the particles incorporated into a water soluble matrix preferably is below 500 ⁇ m.
  • the geometric shape of the washing agent in general is in form of granules, beads or tablets. While granules and beads offer the possibility to adapt the dosed amount to e.g. the water hardness, the tablet form is much preferred since it allows easy and constant dosing and the possibility to better incorporate the sensitive ingredients, e.g. by formulating a core-shell tablet with the most sensitive substances in the core or in core compartments, provided that specific agents shall be separated from each other.
  • geometric shapes have been defined as tablets, granules or beads that in general have round shape at least in one cross section, in the scope of the present invention also similar forms, i.e. forms with at least one rectangular or triangular or hexagonal etc. cross-section can be used.
  • Preferred forms are symmetric forms such as circles, ovals, squares or rectangles.
  • Presently preferred are shapes with at least one round and/or oval cross-section.
  • washing agent may be placed therein for several washing cycles.
  • a container may e.g. be a large container with a storing compartment and a dosing compartment.
  • the storing compartment can be so dimensioned that it has room for washing agent in an amount sufficient for up to about 30 washing cycles.
  • the dosing compartment has room for the amount of washing agent needed or recommended for one washing cycle.
  • the dosing compartment is placed between the storage compartment and the washing agent supply, e.g. a tube supplying fresh water or water from the washing compartment to the dosing compartment for washing out the washing agent comprised in said washing compartment and for supplying said washed out washing agent to the washing compartment.
  • the dosing compartment is separated from both the storing compartment and the washing agent supply by movable separations, e.g. sliders, that preferably are automatically opened or closed.
  • the movable separation separating the dosing compartment from the washing agent supply has to be in the closed position prior to opening the movable separation separating the storing compartment and the dosing compartment.
  • the movable separation between the dosing compartment and the storing compartment is closed.
  • the movable separation between the dosing compartment and the washing agent supply is opened and the dosed amount of washing agent is washed out with water and supplied to the washing compartment.
  • washing agent containers as described above may be provided or one washing agent container with two different dosing compartments.
  • the dosing compartments can be filled directly after having been emptied or - for reducing the contact with humidity and thus enhancing the storage stability - directly at the beginning of a washing cycle.
  • the agent of the present invention can also be used in ordinary washing machines with one or more washing agent containers and a washing agent supply, the containers and supply being designed for only one washing cycle, optionally with a pre-washing step. In this case, for easy dosing, tablets are much preferred.
  • the washing agent can be a homogeneously mixed composition or it may comprise phases with higher concentrations of specific, e.g. especially humidity sensitive, compounds, or phases wherein compounds that might interact with each other are separated.
  • ingredients may be incorporated into the matrix in coated form.
  • enzymes and bleaching agents are preferably incorporated in coated form. They can either be homogeneously mixed with the matrix or incorporated in additionally protected "inner" phases of the washing agent, e.g. forming a core-shell tablet.
  • the inventive washing agent comprises a matrix 1 and active substances, examples of which are further described below.
  • the active substances can either be homogeneously distributed throughout the matrix 1 ( Figure 1) or they can be present in separate second phases 2 ( Figures 2 and 3) or part of the active substances can be homogeneously mixed with the matrix 1 and part can be present in separate second phases 2 ( Figures 2 and 3).
  • the separate second phase 2 can be formed from different beads or bars, e.g. beads with one basic composition but different sensitive ingredients, e.g. ingredients that shall be kept separately until the washing process starts, or the second phase 2 may encompass areas, e.g. beads or bars, with different solubility so that ingredients may have optimal effect at different stages of the washing process. Second phases with e.g. different ingredients or compositions or different solubility are marked in the Figures by different hatchings.
  • the matrix 1 essentially consists of a water soluble medium that is water-tight as well as humidity-tight such that it serves as a sealing and protection medium for critical substances and preferably results in a washing agent that is dimensionally stable at the temperatures to be expected in washing machines.
  • the matrix 1 is preferably formed by polyethylene glycols (PEG) and/or polypropylene glycols (PPG) and/or polyethylene glycol-polypropylene glycol block-copolymers, and/or EO/PO adducts with a melting point above 40°C, optionally and preferably together with further/other surfactants, in particular low-foaming non-ionic surfactants.
  • PEG polyethylene glycols
  • PPG polypropylene glycols
  • EO/PO adducts with a melting point above 40°C, optionally and preferably together with further/other surfactants, in particular low-foaming non-ionic surfactants.
  • the substances intended to form the matrix 1 are chosen with regard to their average molecular weight and combined such that the mixture, or the final solid washing agent, respectively, has the desired physical properties, in particular the desired water and humidity tightness, dimensional stability and dissolution rate.
  • the size of the particles incorporated into a water soluble matrix 1 preferably is below 500 ⁇ m.
  • phase matrix the carrier of each phase (phase matrix) is identical.
  • an active substance comprising phase 2 might lack a surfactant while the basic matrix 1 might incorporate one.
  • the matrixes have different dissolution rate.
  • core-shell tablets, granules or beads are preferred with a core comprising the sensitive ingredients either in the form of a second phase 2 or as second phases 2 incorporated into a matrix 1.
  • the shell is formed by a matrix 1 around said core.
  • the melting point of the matrix 1 should be such that the maximal temperatures expected in washing machines, in particular at the site of the storage compartment/dosing compartment, does not lead to a sticking together of the tablets or granules or beads or their adherence to the container walls.
  • variations and inaccuracies of the temperature regulation in general assumed to be about ⁇ 5°C, have to be included in the melting point considerations.
  • the positioning of the storage/dosing compartment influences the temperature at the container comprising the solid washing agent and might be taken into consideration for determining the needed melting point.
  • the maximal temperature expected in proximity to the dosing unit is chosen.
  • the turbidity/cloud point of the surfactants in water is preferably adjusted, namely to above about 18°C, preferably above 25°C.
  • the matrix in general has a melting point in the range of 45 - 85°C, dependent on the positioning of the storage container and the further (high melting) ingredients. If the agent shall be applicable independent of an specific use, a melting point of about 80°C is preferred.
  • the turbidity/cloud point in water should be above 18°C, preferably above 25°C.
  • Main ingredients of the matrix are consistency providing agents, in particular
  • Such mixtures are suitable to adjust the melting point.
  • low-foaming non-ionic surfactants and cationic and/or amphoteric surfactants or polymers, respectively that can be combined with the low-foaming non-ionic surfactants can be used.
  • Cationic and/or amphoteric surfactants or polymers, respectively, can be added in order to get specific cleaning effects on the goods to be washed.
  • non-ionic surfactants examples are:
  • alkoxylated fatty alcohols in particular those that are ethoxylated and/or propoxylated.
  • alkyl polyglycolethers EO/PO-blockpolymers, endgroup capped (fatty) alcohol EO adducts, low foaming esters of carboxylic acids, in particular EO/PO adducts, and mixtures thereof.
  • the used non-ionic surfactants in general have a turbidity/clouding point in the range of 18 - 65°C.
  • Dialkyldimethylammonium chlorides such as e.g. distearyldimethylammonium chloride, bis (partially hydrogenated nortalow carboxyethyl)-(2-hydroxyethyl)-methyl ammonium methosulfate and diquarternary polydimethylsiloxans
  • Amphoteric surfactants or polymers are Amphoteric surfactants or polymers:
  • amphoteric surfactants or polymers examples include caprylic glycinate, cocamidopropylbetain and disodium cocoampho diacetate.
  • Suitable builders are inorganic builders, optionally together with one or more co-builder, and organic builders.
  • Preferred inorganic builders are selected from the group consisting of zeolites, silicates, phosphates, alkali carriers and mixtures thereof.
  • Examples of preferred zeolites are zeolite A and zeolite P
  • examples of preferred silicates are alkaline metal silicates, in particular sodium silikates, sodium disilikates, sodium metasilicates, and mixtures thereof
  • examples of preferred phosphates are alkaline metal phosphates, especially preferred pentasodium triphosphate, pentapotassium triphosphate (sodium tripolyphosphate or potassium tripolyphosphate) and mixtures thereof.
  • alkali carriers examples include alkaline metal hydroxides, alkaline metal carbonates, alkaline metal bicarbonates (alkaline metal hydrogencarbonates), alkaline metal silicate, alkaline metal metasilicate and layered silicates and mixtures thereof.
  • Builder systems comprising inorganic builder(s) and organic co-builder(s):
  • a preferred inorganic builder system for use together with an organic co-builder or a system of organic co-builders comprises at least one of the compounds listed below, preferably a mixture comprising all compounds, namely compounds selected from the group consisting of tripolyphosphates, sodium carbonate, alkaline metal silicates, in particular disilicates, layered silicates and zeolites.
  • Organic co-builders are preferably selected from the group consisting of: homologue polymeric polycarboxylates/polycarboxylic acids and copolymeric polycarboxylates/polycarboxylic acids, polymeric amino dicarboxylic acids, polyacetales, dextrines, phosphonates and mixtures thereof.
  • homologue polymeric polycarboxylates are polyacrylic acids, alkaline metal salts of polyacrylic acid, polymethacrylic acids, alkaline metal salts of polymethacrylic acid, and mixtures thereof.
  • copolymeric polycarboxylates and copolymeric polycarboxylic acids are the acids or alkaline metal salts of acrylic acid and methacrylic acid, acrylic acid and maleic acid, methacrylic acid and maleic acid, acrylic acid and sulfonic acid, and mixtures thereof.
  • polymeric amino dicarboxylic acids preferably are polyaspartic acids, their salts and derivatives.
  • phosphonates are hydroxyalkane phosphonates, preferrably 1-hydroxyethane-1,1-diphosphonate (HEDP), and aminoalkane phosphonates, preferrably ethylenediamine tetramethylenephosphonate (EDTMP), diethylenetriamine pentamethylenephosphonate (DTPMP), and mixtures thereof
  • HEDP 1-hydroxyethane-1,1-diphosphonate
  • ETMP ethylenediamine tetramethylenephosphonate
  • DTPMP diethylenetriamine pentamethylenephosphonate
  • the co-builders are preferably present as powders.
  • Suitable organic builders are polycarboxylic acids and their salts, in particular the sodium salts.
  • organic builders are citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, their salts and derivatives, amino carboxylic acids, nitrilo triacetic acid (NTA), methyl glycine diacetate and mixtures thereof.
  • NTA nitrilo triacetic acid
  • Suitable bleaching agents are compounds that in contact with water form hydrogen peroxide. Such compounds are used in combination with bleaching activators and optionally boosters and/or catalysts. Further suitable bleaching agents are inorganic or, preferably, organic bleaching agents, especially peracids.
  • Examples for compounds that in water liberate H 2 O 2 are sodium percarbonate, sodium perborate tetrahydrate, sodium perborate monohydrate, peroxypyrophosphates, citrateperhydrates, and mixtures thereof.
  • Suitable bleaching activators are compounds comprising one or more N-acyl groups and/or O-acyl groups, such as compounds selected from the groups consisting of anhydrides, esters, imides, acylated imidazoles, oximes and mixtures thereof, preferably compounds selected from the following group of examples:
  • activators for use in the inventive dishwashing agent are nitriles and so called nitrile quats.
  • Some examples are 4-morpholinecarbonitrile, (cyanomethyl)diethylmethylammoniumtosylate, and mixtures thereof.
  • bleaching activators can be used. Examples for preferred combinations are: TAED/NOBS etc.
  • Examples for suitable performance "boosters" for activated bleaching systems are imines and imine quats (oxazaridine precursors) such as N-methyl-3,4-dihydroisochinoliniumtosylate.
  • Suitable catalysts that may assist in the activation of oxygen are organic metal complexes, in particular complexes with Fe, Mn, Cu or Co as central atom.
  • suitable catalysts are salen complexes and saltren complexes, in particular a tris(2-salicylideneamino)ethylamine manganese (III) saltrene complex obtainable as Tinocat TM , from Ciba Speciality Chemicals.
  • Suitable catalysts are manganese complexes with 1,4,7-trimethyl-1,4,7-triazacyclononane ligands (MnTACN)as described in EP 458397 to Unilever , or pentaamine acetatocobalt(III) nitrate (PAAN) (see US patent 5,804,542 (1998 )).
  • MnTACN 1,4,7-trimethyl-1,4,7-triazacyclononane ligands
  • PAAN pentaamine acetatocobalt(III) nitrate
  • organic bleaching agents especially peracids may be added either alone or together with a bleaching activator (Suitable bleaching activators are e.g. those described above for the H 2 O 2 liberating bleaching agents).
  • Suitable bleaching activators are e.g. those described above for the H 2 O 2 liberating bleaching agents.
  • Such organic bleaching agents are:
  • chlorine liberating bleaching agents and their salts may be used.
  • inorganic bleaching agents especially peracids and their salts may be used.
  • diacylperoxides is dibenzoylperoxide.
  • arylperoxy acids and their salts are peroxybenzoic acid and their derivatives comprising one or more substituents in the aromatic ring, in particular substituents selected from alkyl, aryl, Cl, COOH, especially magnesium monoperphthalate.
  • aliphatic or substituted aliphatic peroxyacids and their salts are peroxylauric acid, peroxystearic acid, o-carboxybenzamide peroxycapronic acid, N-nonenylamidoperadipic acid, N-nonenylamido persuccinate, much preferred E-phthalimido peroxyhexanoic acid (PAP), and mixtures thereof.
  • PAP E-phthalimido peroxyhexanoic acid
  • peroxy dicarboxylic acids and their salts are 1,9-diperoxyazelaic acid, diperoxysebacic acids,diperoxododecanic acid (DPDDA), diperoxyphthalic acids.
  • Examples for chlorine liberating compounds are heterocyclic N-chloroamides such as trichloroisocyanuric acid, dichloroisocyanuric acid (DICA), their salts and mixtures thereof.
  • heterocyclic N-chloroamides such as trichloroisocyanuric acid, dichloroisocyanuric acid (DICA), their salts and mixtures thereof.
  • inorganic peracids and their salts are peroxomonosulfuric acid, prevailingly as potassium monopersulfate triple salt, also known as (caroic acid).
  • TAED tetraacetylethylenediamine
  • a much preferred bleaching system comprises an organic peracid, in particular phthalimido peroxohexanoic acid (PAP).
  • PAP phthalimido peroxohexanoic acid
  • the organic peracid preferably is used in form of small particles, in general particles of 200 - 1000 ⁇ m, preferably 300 - 700 ⁇ m.
  • the PAP may be used in coated form.
  • Enzymes are used to digest some of the food leftovers on the dishes.
  • Preferred enzymes are hydrolases, in particular hydrolases such as proteases, esterases, lipases, amylases, mannanases and much preferred mixtures of said enzymes.
  • proteases examples include Alcalase TM , Esperase TM , Savinase TM , Everlase TM , Ovozyme TM , Purafect OX TM , Properase TM
  • amylases are Termamyl TM , Duramyl TM , Purastar OxAm TM
  • lipases An example for lipases is Lipolase TM
  • enzyme mixtures comprising proteases and amylases.
  • the enzymes can be used adsorbed on carriers or embedded into a coating in order to additionally protect them from disintegration.
  • a preferred particle size distribution for the enzymes is 200 - 1000 ⁇ m.
  • silver protecting agents are triazoles, such as benzotriazoles, bisbenzotriazoles, aminotriazoles, alkylaminotriazoles, and mixtures thereof
  • benzotriazol and/or alkylaminotriazoles are especially preferred.
  • Perfumes may be added as such or adsorbed on or incorporated in a carrier.
  • Any coloring agent suitable for the use in dishwashers may be used.
  • Usual ingredients for laundry washing agents are anionic, non-ionic, cationic and/or amphoteric surfactants, organic and/or inorganic builder substances (e.g. alkaline washing agents, pH adjusting agents, complexing agents, ion-exchanging agents, enzymes (e.g. proteases, lipases and glycosidases, in particular amylases, cellulases, glucosidases and mannanases) agents for stabilizing the enzymes (e.g.
  • 4-formylphenyl boronic acid bleaching agents, auxiliary substances such as soil-release agents, graying inhibitors, colour transfer inhibitors, re-soiling inhibitors, corrosion inhibitors, optical enhancers, rheology modifiers, conserving agents,foam regulators, UV-absorber, photocatalytic systems, antioxidants, excited state quenchers, aromatics and colorants.
  • proteases e.g. lipases, amylases, cellulases, mannanases
  • Enzymes e.g. proteases, amylases
  • Soil antiredeposition agents and/or soil repellent and/or soil release agents Foamregulators --- Corrosion inhibitors (e.g. silicates) Corrosion inhibitors (e.g. silicates and/or benzotriazoles) Fluorescent whitening agents (FWA's) --- Dye transfer inhibitors --- Fragrances Fragrances Dyes Dyes Formulation aids ---
  • the washing agents of the present invention can easily be prepared using methods known to the skilled person in the art. Dependent on the embodiment to be produced, one or the other method may be preferred (see Figure 4). For example if all ingredients are homogeneously mixed, the active substances may first be mixed with each other and then incorporated into a molten, also premixed matrix 1. The resulting melt can then be casted. In an alternative method, the melt is solidified in form of flakes or other small particles and then pressed or extruded to get its final form.
  • the matrix is formed into granules, then mixed with the optionally partially or preferably totally coated further ingredients and then pressed, preferably without active heating, such that a tablet with a water and humidity tight, capillary-free matrix 1 is formed.
  • a pressure usually is in the range of 10 to 30 tons, dependent on the size of the tablet to be formed.
  • the optionally part of the active substances comprising matrix 1 melt can be produced as described above and formed into extrudable particles.
  • the further phases 2 are produced in an analogue manner and then the matrix 1 and all the phases 2 are co-extruded to form a tablet or bead shaped body that, in a subsequent step, preferably is coated by a shell of matrix 1 material.
  • a suitable matrix that can be used for all above described block forming methods is mainly made of e.g. polyethylene glycols, polypropylene glycols, methoxypropylene glycols (M-PEG's), low-foaming, non-ionic surfactants with a melting point of >40°C, and EO/PO block copolymers having different molecular weights and fatty alcohols such as stearyl alcohol (Loriol C18).
  • These matrix forming substances and further ingredients are mixed such, that the melting point of the matrix or the washing agent, respectively, is above 75°C and the turbidity point/cloud point in water is above 25°C.
  • washing agents can be used in dish washing or laundry washing machines with washing agent containers intended for one washing cycle only, or they may be used with dishwashers or laundry washing machines provided with a storage container suitable for storing washing agent in an amount sufficient for several washing cycles.
  • a storage container is divided into a storage compartment and a dosing compartment.
  • Such dosing compartment may have such a volume as to allow the placement therein of just the amount of washing agent needed for one washing step, e.g. the respective volume of granules or beads or one tablet.
  • a pre-washing step either two identical volumes may be measured or two dosing compartments with different volumes may be provided either connected to the same storage compartment or as two separate storing containers.

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  • Engineering & Computer Science (AREA)
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EP06021294A 2006-10-11 2006-10-11 Agent de nettoyage dosé ou dosable Withdrawn EP1918360A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06021294A EP1918360A1 (fr) 2006-10-11 2006-10-11 Agent de nettoyage dosé ou dosable
EP07019771.0A EP1911833B1 (fr) 2006-10-11 2007-10-10 Agent de nettoyage dosé ou dosable

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EP06021294A EP1918360A1 (fr) 2006-10-11 2006-10-11 Agent de nettoyage dosé ou dosable

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EP1918360A1 true EP1918360A1 (fr) 2008-05-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024780A1 (fr) * 2007-08-20 2009-02-26 Reckitt Benckiser N.V. Composition détergente
CN112654693A (zh) * 2018-09-14 2021-04-13 雷克特本克斯尔菲尼施公司 用于洗涤剂组合物的颗粒物

Citations (6)

* Cited by examiner, † Cited by third party
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WO1992020774A1 (fr) * 1991-05-14 1992-11-26 Ecolab Inc. Concentre chimique compose de deux parties
EP0711828A2 (fr) * 1994-11-14 1996-05-15 Unilever Plc Compositions détergentes
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