EP1305389B1 - Reinigungsmittel - Google Patents

Reinigungsmittel Download PDF

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Publication number
EP1305389B1
EP1305389B1 EP00986684A EP00986684A EP1305389B1 EP 1305389 B1 EP1305389 B1 EP 1305389B1 EP 00986684 A EP00986684 A EP 00986684A EP 00986684 A EP00986684 A EP 00986684A EP 1305389 B1 EP1305389 B1 EP 1305389B1
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EP
European Patent Office
Prior art keywords
organic solvent
ppm
composition
mpa
ether
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
EP00986684A
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English (en)
French (fr)
Other versions
EP1305389A1 (de
Inventor
Brenda Frances Bennie
Mairi Campbell
Elizabeth Ann Alam
Neha Kapur
William Michael Scheper
Glenn Thomas Jordan, Iv
Chanchal Kumar Ghosh
Chandrika Kasturi
Frank William Denome
Brian Xiaoqing Song
James Iain Kinloch
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Procter and Gamble Co
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Procter and Gamble Co
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Publication date
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Priority claimed from PCT/US2000/020255 external-priority patent/WO2002008371A2/en
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP1305389A1 publication Critical patent/EP1305389A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel
    • 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
    • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
    • 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
    • C11D17/0043—For use with aerosol devices
    • 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
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/12—Water-insoluble compounds
    • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
    • C11D3/1246—Silicates, e.g. diatomaceous earth
    • C11D3/1253—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite
    • C11D3/1266—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite in liquid compositions
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
    • 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
    • C11D3/43—Solvents
    • 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
    • C11D3/50—Perfumes
    • 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
    • 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
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/261—Alcohols; Phenols
    • 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
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/263—Ethers
    • 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
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/264—Aldehydes; Ketones; Acetals or ketals
    • 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
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C11D7/3227—Ethers thereof
    • 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
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/16—Metals

Definitions

  • Cooked-, baked- and burnt-on soils are amongst the most severe types of soils to remove from surfaces. Traditionally, the removal of cooked-, baked- and burnt-on soils from cookware and tableware requires soaking the soiled object prior to a mechanical action. Consequently, the automatic dishwashing process alone does not provide a satisfactory removal of cooked-, baked- and burnt-on soils. Manual dishwashing process requires a tremendous rubbing effort to remove cooked-, baked- and burnt-on soils and this can be detrimental to the safety and condition of the cookware/tableware.
  • US-A-5,102,573 provides a method for treating hard surfaces soiled with cooked-on, baked-on or dried-on food residues comprising applying a pre-spotting composition to the soiled article.
  • the composition applied comprises surfactant, builder, amine and solvent.
  • US-A-5,929,007 provides an aqueous hard surface cleaning composition for removing hardened dried or baked-on grease soil deposits.
  • the composition comprises nonionic surfactant, chelating agent, caustic, a glycol ether solvent system, organic amine and anti-redeposition agents.
  • WO-A-94/28108 discloses an aqueous cleaner concentrate composition, that can be diluted to form a more viscous use solution comprising an effective thickening amount of a rod micelle thickener composition, lower alkyl glycol ether solvent and hardness sequestering agent.
  • the application also describes a method of cleaning a food preparation unit having at least one substantially vertical surface having a baked food soil coating. In practice, however, none of the art has been found to be very effective in removing baked-on, polymerized soil from metal and other substrates.
  • a method of removing cooked-, baked-, or burnt-on food soil such as grease, meat, dairy, fruit, pasta and any other food especially difficult to remove after the cooking process
  • cookware and tableware including stainless steel, glass, plastic, wood and ceramic objects.
  • the method comprises washing the cookware/tableware in an automatic dishwashing machine in the presence of an organic solvent system (comprising a single solvent compound or a mixture of solvent compounds) having a volatile organic content having a vapour pressure above 13.32 Pa at 25°C and atmospheric pressure of less than 50%, preferably less than 20% and more preferably less than 10% by weight of the solvent system.
  • volatile organic content of the solvent system is defined as the content of organic components in the solvent system having a vapor pressure higher than the prescribed limit at 25°C and atmospheric pressure.
  • the concentration of the solvent in the wash liquor is from 100 ppm to 10000 ppm, preferably from 200 to 8000 and more preferably from 500 to 5000 ppm.
  • the organic solvent system is preferably used in combination with a surfactant, especially a low foaming non-ionic surfactant and a detergency builder.
  • a surfactant especially a low foaming non-ionic surfactant and a detergency builder.
  • another embodiment of the invention provides a method of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprising washing the cookware/tableware in an automatic dishwashing machine in the presence of surfactant, detergency builder and an organic solvent system wherein the surfactant has a wash liquor concentration of from 10 to 1000, preferably from 100 to 600 ppm, the detergency builder has a wash liquor concentration of 100 to 5000, preferably from 1000 to 3000 ppm and the organic solvent system has a wash liquor concentration of from 100 to 10000 ppm, preferably from 200 to 8000 ppm and more preferably from 500 to 5000 ppm.
  • the pH of the wash liquor will generally be in the alkaline range, preferably at least 10.5 or more preferably at least 11.0, this pH being provided by means of an alkalinity source or sources in one or more compositions used for delivery of the solvent, surfactant and builder.
  • the methods of the invention can be performed using a purpose-designed organic solvent composition, but in a preferred aspect, the invention envisages the use of a plurality of compositions including at least one organic solvent composition.
  • the compositions can be delivered into the same or different cycles of the automatic dishwashing machine. The soiled cookware/tableware is washed in the resulting solvent-containing wash liquor.
  • the removal of cooked-, baked-, or burnt-on food soil from cookware and tableware can be carried out by the use of one or more organic solvent compositions (wherein "solvent composition” is understood to comprise the organic solvent system and optional additional active ingredients and diluents) and one or more automatic dishwashing detergent compositions.
  • solvent composition is understood to comprise the organic solvent system and optional additional active ingredients and diluents
  • automatic dishwashing detergent compositions can be used.
  • the organic solvent composition can be built, unbuilt or generally unbuilt, but when used as an additive composition in conjunction with a dishwashing detergent composition, the solvent composition will normally be relatively unbuilt by comparison with the detergent composition.
  • solvent composition will deliver a minor proportion (less than 50%, preferably less than 25%, more preferably less than 10% by weight) of the total builder delivered to the wash liquor by the one or more solvent compositions and the one or more detergent compositions.
  • general unbuilt is meant that the composition contains less than about 5% by weight of detergency builder.
  • the solvent compositions and automatic dishwashing detergent compositions can be delivered either at the same or at different points of the dishwashing cycle, for example: i) solvent composition and automatic dishwashing detergent composition are independently delivered in the pre-wash cycle and in the main-wash cycle, respectively; ii) a solvent composition and a first automatic dishwashing detergent composition are delivered in the pre-wash cycle and a second automatic dishwashing detergent composition in the main-wash cycle; iii) a first solvent composition and a first automatic dishwashing detergent composition are delivered in the pre-wash cycle and a second solvent composition and a second automatic dishwashing detergent composition in the main-wash cycle; iv) a solvent composition and an automatic dishwashing detergent composition are delivered simultaneously in the main-wash cycle; and v) a solvent composition and an automatic dishwashing detergent composition are delivered in the pre-wash and in the main-wash cycle.
  • Another embodiment provides a method of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprising washing the cookware/tableware in the pre-wash cycle of an automatic dishwashing machine in the presence of an organic solvent composition and thereafter rinsing the cookware/tableware in the rinse cycle of the automatic dishwashing machine in the presence of an automatic dishwashing rinse composition.
  • the organic solvent composition and the automatic dishwashing detergent composition are delivered either i) from separate storage means (e.g. different bottles in the case of liquid compositions, different pouches, etc.) into the same cycle of an automatic dishwashing machine.
  • the organic solvent composition provides a wash liquor concentration of organic solvent as prescribed herein and preferably in the range from about 100 to about 10000 ppm, preferably from about 500 to about 5000; or ii) from separate zones of a multi-zone storage means (e.g. multi-compartment bottle in the case of liquid compositions) into the same or different cycles of an automatic dishwashing machine.
  • the organic solvent composition and the automatic dishwashing detergent composition are delivered from separate zones of a multi-zone storage means at a feed ratio (solvent composition: detergent composition) in the range from about 5:1 to about 1:50, preferably from about 2:1 to about 1:6 and more preferably from about 1:1 to about 1:5 to provide a wash liquor concentration of organic solvent in the range preferably from about 100 to about 10000, more preferably from about 500 to about 5000 ppm.
  • the organic solvent composition and the automatic dishwashing detergent composition are delivered from separate zones of a multi-zone storage means sequentially into the pre-wash and main wash cycle, respectively. This can be valuable in the case of product incompatibility to reduce interaction between the organic solvent composition and the automatic dishwashing detergent composition.
  • the physical form of the organic solvent composition and/or automatic dishwashing detergent composition is preferably such as to prevent intimate mixing of the compositions prior to contact thereof with the wash liquor.
  • the invention can be also reduced to practice using multi-phase, "all-in-one" products.
  • a method of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprising delivering separate portions of a multi-phase detergent composition into the same or different cycles of an automatic dishwashing machine, wherein the multi-phase detergent composition comprises at least a first phase containing an organic solvent composition and at least a second phase containing an automatic dishwashing detergent composition.
  • the multiphase detergent composition for example could take the form of a multi-layer liquid (e.g.
  • the level of solvent delivered to the wash process should be such as to deliver the benefits on cooked-, baked-or burnt-on food soils.
  • the present invention also envisages the use of multiple organic solvent compositions.
  • a first solvent composition in the pre-wash cycle and a second solvent composition in the main-wash cycle are designed to be specific to different soil and/or substrates. They can be delivered into different cycles of a dishwashing machine, with or without different automatic dishwashing detergent compositions, such that for example a first solvent composition and a first automatic detergent composition are delivered into the pre-wash cycle and a second solvent composition and a second automatic dishwashing detergent composition are delivered into the main wash cycle.
  • the organic solvent composition can be in a unit dose form allowing controlled release (for example delayed, sustained, triggered or slow release) of the composition during one or more repeated washing cycles.
  • the solvent composition is contained in a single or multi-compartment pouch.
  • organic solvent compositions for use herein comprise an organoamine solvent or other agent effective in removing the soil and have a liquid surface tension of less than 24.5 mN/m, preferably less than 24 mN/m, more preferably less than 23.5 mN/m.
  • the organic solvent composition additionally comprises a spreading auxiliary.
  • the function of the spreading auxiliary is to reduce the interfacial tension between the organic solvent and the soil, therefore increasing the wettability of soils by organic solvents.
  • the spreading auxiliary when added to the compositions herein containing organic solvents effective in removing the soil leads to a lowering in the surface tension of the compositions, preferred spreading auxiliaries being those which lower the surface tension below that of the auxiliary itself.
  • spreading auxiliaries able to render a surface tension below 30 mN/m, preferably below 28 mN/m and more preferably below 26 mN/m, and especially below 24 mN/m. Surface tensions are measured herein at 25°C.
  • Spreading auxiliaries for use herein can be selected from organic solvents, wetting agents and mixtures thereof.
  • a method of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprises washing the cookware/tableware in an automatic dishwashing machine with an automatic dishwashing detergent composition comprising surfactant (preferably comprising low-foaming nonionic surfactant), detergency builder and organic solvent system in levels sufficient to provide a wash liquor concentration of from 10 ppm to about ppm surfactant, from 100 ppm to 5000 ppm detergency builder, and 100 ppm to 10,000, preferably from 500 ppm to 5000 ppm of organic solvent.
  • surfactant preferably comprising low-foaming nonionic surfactant
  • detergency builder preferably comprising low-foaming nonionic surfactant
  • organic solvent system in levels sufficient to provide a wash liquor concentration of from 10 ppm to about ppm surfactant, from 100 ppm to 5000 ppm detergency builder, and 100 ppm to 10,000, preferably from 500
  • the organic solvent composition can be in the form of a liquid, paste, cream or gel and can be optionally encapsulated, packaged in a single- or multi-compartment pouch, or absorbed onto a porous carrier material.
  • the solvent composition can be aqueous but preferably is anhydrous.
  • Preferred pouches for use herein are water-soluble, solvent-resistant partially hydrolysed PVA pouches.
  • the optimum organic solvent systems for use herein are characterised by extremely low liquid surface tensions and contact angles on polymerised grease-coated substrates. Moreover, they generally consist of mixed solvent systems displaying synergistic contact angle and low surface tension.
  • the organic solvent system herein preferably has a liquid surface tension at 25°C of less than 27 mN/m, preferably less than 25 mN/m.
  • Suitable for the present invention are organic solvent systems comprising a plurality of solvent components in levels such that the solvent system has a surface tension less than, and preferably at least 1 mN/m less than that of any of the individual solvent components.
  • compositions containing the solvent system preferably display an advancing contact angle on a polymerised grease-coated substrate at 25°C of less than 20°, preferably less than 10° and more preferably less than 5°. Furthermore, the advancing contact angle for compositions based on mixed solvent systems should be less than that of any of the corresponding compositions containing the individual components of the solvent system. Such solvent systems and compositions are found to be optimum for the removal of burnt-on soils having a high carbon content from cookware and tableware.
  • the method for determining contact angle is as follows.
  • a sample plate (prepared as described below) is dipped into and pulled out of a liquid and contact angles calculated after Wilhelmy Method.
  • the force exerted on the sample according to the immersion depth is measured (using a Kruss K12 tensiometer and System K121 software) and is proportional to the contact angle of the liquid on the solid surface.
  • the sample plate is prepared as follows: Spray 30-50 grams of Canola Oil into a beaker. Dip a glass slide (3x9x0.1 cm) into the Oil and thoroughly coat the surface. This results in an evenly dispersed layer of oil on the surface. Adjust the weight of product on the slide's surface until approximately 0.5 g of oil has been delivered and evenly distributed. At this point, bake the slides at 232°C (450F) for 20 minutes, and allow to cool to room temperature.
  • organic solvents are suitable for use herein but preferably the organic solvent is selected from alcohols, amines, esters, glycol ethers, glycols, terpenes and mixtures thereof.
  • the organic solvent system will contain less than 50%, preferably less than 20% and more preferably less than 10% of solvent components having a vapor pressure above 13.32 Pa (0.1 mm Hg) at 25°C and atmospheric pressure.
  • the solvent is essentially free (contains less than 5% by weight) of solvent components having a boiling point below 150°C, flash point below 100°C or a vapor pressure above 1 mm Hg at 25°C and atmospheric pressure.
  • the organic solvent system for use herein is preferably selected from organoamine solvents, inclusive of alkanolamines, alkylamines, alkyleneamines and mixtures thereof; alcoholic solvents inclusive of aromatic, aliphatic (preferably C 4 -C 10 ) and cycloaliphatic alcohols and mixtures thereof; glycols and glycol derivatives inclusive of C 2 -C 3 (poly)alkylene glycols, glycol ethers, glycol esters and mixtures thereof; and mixtures selected from organoamine solvents, alcoholic solvents, glycols and glycol derivatives.
  • organoamine solvents inclusive of alkanolamines, alkylamines, alkyleneamines and mixtures thereof
  • alcoholic solvents inclusive of aromatic, aliphatic (preferably C 4 -C 10 ) and cycloaliphatic alcohols and mixtures thereof
  • glycols and glycol derivatives inclusive of C 2 -C 3 (poly)alkylene glycols, glycol ethers, glycol esters
  • the organic solvent comprises organoamine (especially alkanolamine, more especially 2-aminalkanol) solvent and glycol ether solvent, preferably in a weight ratio of from about 3:1 to about 1:3, and wherein the glycol ether solvent is selected from ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monobutyl ether, and mixtures thereof.
  • the glycol ether is a mixture of diethylene glycol monobutyl ether and propylene glycol butyl ether, especially in a weight ratio of from about 1:2 to about 2:1.
  • suitable organic solvents include one or more water-soluble or dispersible, preferably hydroxylated organoamine solvents, especially alkanolamine solvents having a pKa of at least 8.8, preferably at least 9.3 and more preferably at least 9.8.
  • the organic solvent system preferably comprises a mixture of a first organoamine solvent having a pKa of about 9.5 or less and a second organoamine solvent having a pKa greater than about 9.5.
  • organic solvents comprising salts of organoamines which are introduced into the wash liquor of the automatic dishwashing machine at a wash liquor pH above the highest pKa of the organoamine and which thereby act as a source of organoamine solvent.
  • Suitable salt counterions include halides such as chloride and bromide, oxyanions such as sulphate, borate, phosphate, pyrophosphate and polyphosphate and surfactant anions.
  • the organic solvent comprises one or more organoamines which is/are introduced into the wash liquor of an automatic dishwashing machine in the form of their ammonium salt at a wash liquor pH above the highest pKa of the organoamine/s.
  • the organic solvent system is used in conjunction with a wetting agent effective in lowering the surface tension of the solvent system, preferably to at least 1 mN/m less than that of the wetting agent, the wetting agent preferably being selected from organic surfactants having a surface tension less than 30 mN/m, more preferably less than 28 mN/m and specially less than 26 mN/m.
  • a wetting agent for use herein are silicone polyether copolymers, especially silicone poly(alkyleneoxide) copolymers wherein alkylene is selected from ethylene, propylene and mixtures thereof.
  • the organic solvent can be selected from:
  • the invention also relates to detergent packs and multi-component products suitable for use in an automatic dishwashing machine or dishwashing pretreatment to provide baked and burnt-on soil removal and other cleaning benefits.
  • an automatic dishwashing detergent pack comprising two or more automatic dishwashing detergent and/or auxiliary products, storage means comprising separate but associated portions of the two or more products and means, for example electric pump means, for delivering quantities of the two or more products into the same or different cycles of an automatic dishwashing machine.
  • the pack can also comprise means for controlling the relative dispensing rate of the two or more products from the storage means.
  • the pack preferably comprises an organic solvent composition and an automatic dishwashing detergent composition and is used for removing cooked-, baked-, and burnt-on food soil from cookware and tableware.
  • the two or more automatic dishwashing detergent or auxiliary products are in rheology-matched gel-form.
  • Compositions are considered to be rheology-matched if they have similar yield values (differing by less than 50%, preferably by less than 20%) and/or similar viscosities (differing by less than 50%, preferably by less than 20%) under the same shear conditions.
  • an organic solvent composition comprises 1% to 99%, preferably from 5% to 90% of an organic solvent system for removing cooked-, baked-, or burnt-on food soil from cookware and tableware, from 0.5% to 50%, preferably from 5% to 25% of bleach and from 0.0001 % to 10% of detergency enzyme.
  • the compositions preferably are in gel-form and contain a thickener such as methylcellulose or other nonionic cellulosic thickener.
  • the solvent compositions are preferably anhydrous (containing less than 5%, preferably less than 1% of water) and comprise bleach in the form of a particulate suspension having an average particle size in the range from 10 to 100 ⁇ m, preferably from 25 to 75 ⁇ m.
  • the compositions are also builder free or generally builder free. It is a feature of the invention that a broad range of solvents, including organoamine solvents can be incorporated in the solvent compositions of the invention with acceptable bleach stability provided the water content of the composition is carefully controlled.
  • an automatic dishwashing detergent composition comprises from 0.05% to 10% by weight of a low-foaming non-ionic surfactant, from 1% to 30% of an organoamine, preferably alkanolamine (especially monoethanolamine) solvent and at least 5% by weight of a detergency builder.
  • the automatic dishwashing detergent composition is in the form of a gel comprising from 2% to 20%, preferably from 5% to 15% by weight of an alkanolamine, at least 5% by weight of detergency builder, and from 0.1% to 5% by weight of a low foaming non-ionic surfactant.
  • compositions also preferably have a pH (1% aqueous solution) in excess of about 9.0, preferably in excess of about 10.5 and more preferably greater than about 11.
  • an automatic dishwashing detergent composition comprises from 0.05% to 10% by weight of a low-foaming non-ionic surfactant, from 1% to 30% of an organic solvent, preferably alkanolamine solvent, at least 5% by weight of a detergency builder and a wetting agent, preferably a silicone-poly(alkyleneoxide) copolymers.
  • an automatic dishwashing detergent pack comprising: i) an organic solvent composition suitable for use in automatic dishwashing comprising from 1% to 99%, preferably from 5% to 90%, especially from 40% to 80% of an organic solvent system for removing cooked-, baked-, or burnt-on food soil from cookware and tableware, from 0.5% to 50%, preferably from 5% to 25% of bleach, from 0.0001% to 10% of detergency enzyme, and wherein the composition is in the form of an anhydrous gel comprising bleach in the form of a particulate suspension; and ii) an automatic dishwashing detergent composition comprising from 0.05% to 10% by weight of a low-foaming non-ionic surfactant, optionally from 1% to 30% of an organoamine, preferably alkanolamine solvent, and at least 5% by weight of a detergency builder.
  • an organic solvent composition suitable for use in automatic dishwashing comprising from 1% to 99%, preferably from 5% to 90%, especially from 40% to 80% of an organic solvent system
  • the automatic dishwashing detergent composition is in the form of a gel comprising from 2% to 20%, preferably from 5% to 15% by weight of the composition of an alkanolamine, at least 5% by weight of detergency builder (such as sodium potassium tripolyphosphate), and from 0.1 % to 5% by weight of the composition of a low foaming non-ionic surfactant.
  • detergency builder such as sodium potassium tripolyphosphate
  • compositions of the invention are also characterised by having a low volatile organic content, preferably with a volatile organic content less than 20%, preferably less than 10% and more preferably less than 5%.
  • Suitable thickening agents for use in the solvent compositions and dishwashing detergent compositions herein include viscoelastic, thixotropic thickening agents at levels of from about 0.1% to about 10%, preferably from about 0.25% to about 5%, most preferably from about 0.5% to about 3% by weight.
  • Suitable thickening agents include polymers with a molecular weight from about 500,000 to about 10,000,000, more preferably from about 750,000 to about 4,000,000.
  • the preferred cross-linked polycarboxylate polymer is preferably a carboxyvinyl polymer. Such compounds are disclosed in U.S. Pat. No. 2,798,053, issued on Jul. 2, 1957, to Brown. Methods for making carboxyvinyl polymers are also disclosed in Brown. Carboxyvinyl polymers are substantially insoluble in liquid, volatile organic hydrocarbons and are dimensionally stable on exposure to air.
  • Preferred polyhydric alcohols used to produce carboxyvinyl polymers include polyols selected from the class consisting of oligosaccarides, reduced derivatives thereof in which the carbonyl group is converted to an alcohol group, an pentaerythritol; most preferred is sucrose or pentaerythritol. It is preferred that the hydroxyl groups of the modified polyol be etherified with alkyl groups, the polyol having at least two allyl ether groups per polyol molecule. When the polyol is sucrose, it is preferred that the sucrose have at least about five allyl ether groups per sucrose molecule. It is preferred that the polyether of the polyol comprise from about 0.1% to about 4% of the total monomers, more preferably from about 0.2% to about 2.5%.
  • Carbopol® Various carboxyvinyl polymers, homopolymers and copolymers are commercially available from B. F. Goodrich Company, New York, N.Y., under the trade name Carbopol®. These polymers are also known as carbomers or polyacrylic acids.
  • Carboxyvinyl polymers useful in formulations of the present invention include Carbopol 910 having a molecular weight of about 750,000, Carbopol 941 having a molecular weight of about 1,250,000, and Carbopols 934 and 940 having molecular weights of about 3,000,000 and 4,000,000, respectively. More preferred are the series of Carbopols which use ethyl acetate and cyclohexane in the manufacturing process, Carbopol 981, 2984, 980, and 1382.
  • Preferred polycarboxylate polymers are non-linear, water-dispersible, polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000.
  • polycarboxylate polymers for use in the present invention are Sokalan PHC-25®, a polyacrylic acid available from BASF Corporation, the Carbopol 600 series resins available from B. F. Goodrich, and more preferred is Polygel DK available from 3-V Chemical Corporation. Mixtures of polycarboxylate polymers as herein described may also be used in the present invention.
  • suitable thickening agents include inorganic clays (e.g. laponites, aluminium silicate, bentonite, fumed silica).
  • the preferred clay thickening agent can be either naturally occurring or synthetic.
  • Preferred synthetic clays include the synthetic smectite-type clay sold under the trademark Laponite by Southern Clay Products, Inc. Particularly useful are gel forming grades such as Laponite RD and sol forming grades such as Laponite RDS.
  • Natural occurring clays include some smectite and attapulgite clays. Mixtures of clays and polymeric thickeners are also suitable for use herein.
  • the cellulosic type thickeners hydroxyethyl and hydroxymethyl cellulose (ETHOCEL and METHOCEL® available from Dow Chemical) can also be used.
  • compositions suitable for inclusion in pouches will normally comprise a major proportion of solvent system components, preferably at least 50% by weight, more preferably at least 70% by weight or even higher.
  • the present invention envisages the use of solvent compositions as additives for conventional automatic dishwashing detergent compositions. It also envisages multi-component dishwashing products containing purpose-designated combination of solvent compositions and dishwashing detergent compositions. The invention also envisages so called "all-in-one" detergent products having both an alkaline detergent and a solvent functionality. In the case of additive and multi-component products, the invention does not require the two compositions to be in the same physical form.
  • the organic solvent composition can be in any physical form, e.g. liquid, paste, cream, gel, powder, granules or tablets and similarly the automatic dishwashing detergent composition can be in any of these forms.
  • both compositions are in the form of liquids or gels or the organic solvent composition is in the form of liquid or gel and the automatic dishwashing detergent composition is in the form of powder, granules or tablet.
  • the compositions used herein can be dispensed from any suitable device, such as bottles (pump assisted bottles, squeeze bottles), paste dispensers, capsules, multi-compartment bottles, multi-compartment capsules, pouches, and multi-compartment pouches, etc.
  • the solvent compositions herein comprise one or more organic solvents and can additionally comprises surfactant, bleach, enzyme, enzyme stabilising components, thickener, etc.
  • the organic solvents should be selected so as to be compatible with the tableware/cookware as well as with the different parts of an automatic dishwashing machine. Furthermore, the solvent system should be effective and safe to use having a volatile organic content above 133.32Pa (1mm Hg) (and preferably above 13.33Pa (0.1 mm Hg)) of less than 50%, preferably less than 30%, more preferably less than 10% by weight of the solvent system. Also they should have very mild pleasant odours.
  • the individual organic solvents used herein generally have a boiling point above about 150°C, flash point above 100°C and vapor pressure below 133.32 Pa (1 mm Hg) preferably below 13.33 (0.1 mm Hg) at 25°C and atmospheric pressure.
  • Solvents that can be used herein include: i) alcohols, such as benzyl alcohol, 1,4-cyclohexanedimethanol, 2-ethyl-1-hexanol, furfuryl alcohol, 1,2-hexanediol and other similar materials; ii) amines, such as alkanolamines (e.g.
  • primary alkanolamines monoethanolamine, monoisopropanolamine, diethylethanolamine, ethyl diethanolamine, beta-aminoalkanols
  • secondary alkanolamines diethanolamine, diisopropanolamine, 2-(methylamino)ethanol
  • ternary alkanolamines triethanolamine, triisopropanolamine
  • alkylamines e.g.
  • primary alkylamines monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, cyclohexylamine), secondary alkylamines: (dimethylamine), alkylene amines (primary alkylene amines: ethylenediamine, propylenediamine) and other similar materials; iii) esters, such as ethyl lactate, methyl ester, ethyl acetoacetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate and other similar materials; iv) glycol ethers, such as ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol
  • Preferred solvents effective in removing cooked-, baked- or burnt-on food soil to be used herein comprise alkanolamines, especially monoethanolamine, beta-aminoalkanols, especially 2-amino-2-methyl-propanol (since it has the lowest molecular weight of any beta-aminoalkanol which has the amine group attached to a tertiary carbon, therefore minimize the reactivity of the amine group) and mixtures thereof.
  • the detergent and cleaning compositions herein can comprise traditional detergency components and can also comprise organic solvents having a cleaning function and organic solvents having a carrier or diluent function or some other specialised function.
  • the compositions will generally be built and comprise one or more detergent active components which may be selected from colorants, bleaching agents, surfactants, alkalinity sources, enzymes, thickeners (in the case of liquid, paste, cream or gel compositions), anti-corrosion agents (e.g. sodium silicate), hydrotropes (e.g. sodium cumene sulfate) and disrupting and binding agents (in the case of powder, granules or tablets).
  • Highly preferred detergent components include a builder compound, an alkalinity source, a surfactant, an enzyme and a bleaching agent.
  • the components described hereinbelow can be incorporated either in the organic solvent compositions and/or the detergent or cleaning compositions.
  • the detergent surfactant is preferably low foaming by itself or in combination with other components (i.e. suds suppressers).
  • the detergent surfactant is preferably foamable in direct application but low foaming in automatic dishwashing use.
  • Surfactants suitable herein are disclosed, for example, in US-A-3,929,678 , US-A- 4,259,217, EP-A-0414 549, WO-A-93/08876 and WO-A-93/08874.
  • Surfactants are typically present at a level of from about 0.2% to about 30% by weight, more preferably from about 0.5% to about 10% by weight, most preferably from about 1% to about 5% by weight of composition.
  • Preferred surfactant for use herein are low foaming and include low cloud point nonionic surfactants and mixtures of higher foaming surfactants with low cloud point nonionic surfactants which act as suds suppresser therefor.
  • Builders suitable for use herein include water-soluble builders such as citrates, carbonates and polyphosphates e.g. sodium tripolyphosphate and sodium tripolyphosphate hexahydrate, potassium tripolyphosphate and mixed sodium and potassium tripolyphosphate salts; and partially water-soluble or insoluble builders such as crystalline layered silicates (EP-A-0164514 and EP-A-0293640) and aluminosilicates inclusive of Zeolites A, B, P, X, HS and MAP.
  • the builder is typically present at a level of from about 1% to about 80% by weight, preferably from about 10% to about 70% by weight, most preferably from about 20% to about 60% by weight of composition.
  • Amorphous sodium silicates having an SiO 2 :Na 2 O ratio of from 1.8 to 3.0, preferably from 1.8 to 2.4, most preferably 2.0 can also be used herein although highly preferred from the viewpoint of long term storage stability are compositions containing less than about 22%, preferably less than about 15% total (amorphous and crystalline) silicate.
  • Enzymes suitable herein include bacterial and fungal cellulases such as Carezyme and Celluzyme (Novo Nordisk A/S); peroxidases; lipases such as Amano-P (Amano Pharmaceutical Co.), M1 Lipase R and Lipomax R (Gist-Brocades) and Lipolase R and Lipolase Ultra R (Novo); cutinases; proteases such as Esperase R , Alcalase R , Durazym R and Savinase R (Novo) and Maxatase R , Maxacal R , Properase R and Maxapem R (Gist-Brocades); and ⁇ and ⁇ amylases such as Purafect Ox Am R (Genencor) and Termamyl R , Ban R , Fungamyl R , Duramyl R , and Natalase R (Novo); and mixtures thereof. Enzymes are preferably added herein as prills, granulates, or cogranulates at
  • Bleaching agents suitable herein include chlorine and oxygen bleaches, especially inorganic perhydrate salts such as sodium perborate mono-and tetrahydrates and sodium percarbonate optionally coated to provide controlled rate of release (see, for example, GB-A-1466799 on sulfate/carbonate coatings), preformed organic peroxyacids and mixtures thereof with organic peroxyacid bleach precursors and/or transition metal-containing bleach catalysts (especially manganese or cobalt).
  • Inorganic perhydrate salts are typically incorporated at levels in the range from about 1% to about 40% by weight, preferably from about 2% to about 30% by weight and more preferably from abut 5% to about 25% by weight of composition.
  • Bleach precursors are typically incorporated at levels in the range from about 0.5% to about 25%, preferably from about 1% to about 10% by weight of composition while the preformed organic peroxyacids themselves are typically incorporated at levels in the range from 0.5% to 25% by weight, more preferably from 1% to 10% by weight of composition.
  • Bleach catalysts preferred for use herein include the manganese triazacyclononane and related complexes (US-A-4246612, US-A-5227084); Co, Cu, Mn and Fe bispyridylamine and related complexes (US-A-5114611); and pentamine acetate cobalt(III) and related complexes(US-A-4810410).
  • the suds suppressers suitable for use herein include nonionic surfactants having a low cloud point.
  • Cloud point is a well known property of nonionic surfactants which is the result of the surfactant becoming less soluble with increasing temperature, the temperature at which the appearance of a second phase is observable is referred to as the “cloud point” (See Kirk Othmer, pp. 360-362).
  • a “low cloud point” nonionic surfactant is defined as a nonionic surfactant system ingredient having a cloud point of less than 30° C., preferably less than about 20° C., and even more preferably less than about 10° C., and most preferably less than about 7.5° C.
  • Typical low cloud point nonionic surfactants include nonionic alkoxylated surfactants, especially ethoxylates derived from primary alcohol, and polyoxypropylene/polyoxyethylene/polyoxypropylene (PO/EO/PO) reverse block polymers.
  • low cloud point nonionic surfactants include, for example, ethoxylated-propoxylated alcohol (e.g., Olin Corporation's Poly-Tergent® SLF18) and epoxy-capped poly(oxyalkylated) alcohols (e.g., Olin Corporation's Poly-Tergent® SLF18B series of nonionics, as described, for example, in US-A-5,576,281).
  • Preferred low cloud point surfactants are the ether-capped poly(oxyalkylated) suds suppresser having the formula: wherein R 1 is a linear, alkyl hydrocarbon having an average of from about 7 to about 12 carbon atoms, R 2 is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, R 3 is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, x is an integer of about 1 to about 6, y is an integer of about 4 to about 15, and z is an integer of about 4 to about 25.
  • R I is selected from the group consisting of linear or branched, saturated or unsaturated, substituted or unsubstituted, aliphatic or aromatic hydrocarbon radicals having from about 7 to about 12 carbon atoms
  • R II may be the same or different, and is independently selected from the group consisting of branched or linear C 2 to C 7 alkylene in any given molecule
  • n is a number from 1 to about 30
  • R III is selected from the group consisting of:
  • suitable components herein include organic polymers having dispersant, anti-redeposition, soil release or other detergency properties invention in levels of from about 0.1% to about 30%, preferably from about 0.5% to about 15%, most preferably from about 1% to about 10% by weight of composition.
  • Preferred anti-redeposition polymers herein include acrylic acid containing polymers such as Sokalan PA30, PA20, PA15, PA10 and Sokalan CP10 (BASF GmbH), Acusol 45N, 480N, 460N (Rohm and Haas), acrylic acid/maleic acid copolymers such as Sokalan CP5 and acrylic/methacrylic copolymers.
  • Preferred soil release polymers herein include alkyl and hydroxyalkyl celluloses (US-A-4,000,093), polyoxyethylenes, polyoxypropylenes and copolymers thereof, and nonionic and anionic polymers based on terephthalate esters of ethylene glycol, propylene glycol and mixtures thereof.
  • Heavy metal sequestrants and crystal growth inhibitors are suitable for use herein in levels generally from about 0.005% to about 20%, preferably from about 0.1% to about 10%, more preferably from about 0.25% to about 7.5% and most preferably from about 0.5% to about 5% by weight of composition, for example diethylenetriamine penta (methylene phosphonate), ethylenediamine tetra(methylene phosphonate) hexamethylenediamine tetra(methylene phosphonate), ethylene diphosphonate, hydroxy-ethylene-1,1-diphosphonate, nitrilotriacetate, ethylenediaminotetracetate, ethylenediamine-N,N'-disuccinate in their salt and free acid forms.
  • diethylenetriamine penta methylene phosphonate
  • ethylene diphosphonate hydroxy-ethylene-1,1
  • compositions herein can contain a corrosion inhibitor such as organic silver coating agents in levels of from about 0.05% to about 10%, preferably from about 0.1% to about 5% by weight of composition (especially paraffins such as Winog 70 sold by Wintershall, Salzbergen, Germany), nitrogen-containing corrosion inhibitor compounds (for example benzotriazole and benzimadazole - see GB-A-1137741) and Mn(II) compounds, particularly Mn(II) salts of organic ligands in levels of from about 0.005% to about 5%, preferably from about 0.01% to about 1%, more preferably from about 0.02% to about 0.4% by weight of the composition.
  • a corrosion inhibitor such as organic silver coating agents in levels of from about 0.05% to about 10%, preferably from about 0.1% to about 5% by weight of composition (especially paraffins such as Winog 70 sold by Wintershall, Salzbergen, Germany), nitrogen-containing corrosion inhibitor compounds (for example benzotriazole and benzimadazole - see GB-A-11
  • Suitable components herein include colorants, water-soluble bismuth compounds such as bismuth acetate and bismuth citrate at levels of from about 0.01% to about 5%, enzyme stabilizers such as calcium ion, boric acid, propylene glycol and chlorine bleach scavengers at levels of from about 0.01% to about 6%, lime soap dispersants (see WO-A-93/08877), suds suppressors (see WO-93/08876 and EP-A-0705324), polymeric dye transfer inhibiting agents, optical brighteners, perfumes, fillers and clay.
  • enzyme stabilizers such as calcium ion, boric acid, propylene glycol and chlorine bleach scavengers at levels of from about 0.01% to about 6%
  • lime soap dispersants see WO-A-93/08877
  • suds suppressors see WO-93/08876 and EP-A-0705324
  • polymeric dye transfer inhibiting agents such as optical brighteners, perfumes, fillers
  • a combination of solvent compositions and automatic dishwashing detergents are used to wash a load of tableware and cookware having cooked-on, baked-on and burnt-on food soils.
  • the load comprises different soils and different substrates: lasagne baked for 2 hours at 140°C on Pyrex, lasagne cooked for 2 hours at 150°C on stainless steel, potato and cheese cooked for 2 hours at 150°C on stainless steel, egg yolk cooked for 2 hours at 150°C on stainless steel and sausage cooked for 1 hour at 120°C followed by 1 hour at 180°C.
  • the load is washed in a 5 litre liquor capacity Bosch 6032 dishwashing machine, at 55°C without prewash, using the compositions given in Examples 1 to 5.
  • Examples 1 to 5 illustrate the use of a combination of a two-phase automatic dishwashing detergent tablet and an organic solvent composition added separately to the main-wash cycle of the dishwashing machine.
  • the two-component compositions of examples 1 to 5 provided excellent removal of cooked-on, baked-on and burnt-on food soils.
  • Example 1 2 3 4 5 Dishwashing detergent composition Phase 1 Carbonate 3.5 3.4 5.030 3.375 5.063 STPP 10.1 10.1 9.49 9.85 8.73 Silicate 1.1 1.0 1.58 1.61 1.548 SKS-6 1.5 1.4 2.16 1.425 2.138 HEDP 0.18 0.18 0.27 0.18 0.27 PB1 2.45 2.45 3.53 2.4 3.6 Termamyl 0.11 0.11 0.16 0.11 0.165 FN3 0.15 Savinase 0.12 0.12 0.17 0.12 0.18 LF404 0.60 0.60 0.86 SLF18 0.60 0.90 C 16 AO 0.16 0.24 PA30 0.1 0.1 0.15 CHDM 0.02 0.03 BTA 0.06 0.03 0.09 0.045 0.068 PEG 4000 0.26 0.26 0.44 Winog 0.1 0.07 0.09 0.065 0.098 Vivapur 0.48 0.32 0.48 Triacetate 0.72 Perfume 0.02 0.02 0.01 Total 20.1g 19.84g 25.23g 21.05g 24.663g Phase 2 FN3 0.29
  • Examples 1 to 5 were repeated using the same automatic dishwashing detergent compositions but using an organic solvent composition comprising 10 ml of 2-amino-2-methyl-1-propanol and 2ml of Silwet L7600.
  • the compositions provided excellent removal of cooked-on, baked-on and burnt-on food soils.
  • Examples 6 to 10 illustrate the use of a combination of an automatic dishwashing liquid detergent and an organic solvent composition for removing cooked-, baked- and burnt-on soils.
  • the two-component compositions of examples 6 to 10 are used to wash a load of cookware and tableware according to the procedure described hereinabove (Examples 1 to 5).
  • 30 ml of the dishwashing detergent and the 10 ml of the solvent composition are separately delivered to the main-wash cycle of a 5 litre liquor capacity Bosch 6032 dishwashing machine, at 55°C without prewash.
  • the compositions of examples 6 to 10 provide excellent removal of cooked-on, baked-on and burnt-on food soils.
  • Example 6 7 8 9 10 Dishwashing detergent composition KOH 14.31 14.31 14.31 11.45 4.67 H2SO4 11.26 11.26 11.26 9.00 STPP 16.00 16.00 16.00 20.00 SKTP 30.00 1,2-Propanediol 0.50 0.50 0.50 0.5 6.00 Boric acid 3.00 3.00 3.00 3.0 4.00 Polygel premix 24.40 24.40 24.40 24.00 24.40 PVPVI 0.02 SLF18 1.0 1.0 1.00 C 16 AO 0.6 0.6 2.00 2.00 ACNI 0.3 0.3 3.00 CaCl2 0.04 0.04 0.37 0.37 Na benzoate 0.61 0.61 0.61 0.61 0.61 Proxel GXL 0.05 0.05 0.05 0.05 0.05 0.05 0.05 FN3 0.60 0.60 0.60 0.60 0.90 Duramyl 0.27 0.27 0.27 Termamyl 0.3 0.17 0.26 Perfume 0.1 0.1 0.2 0.1 0.1 Dye 0.4 0.4 0.3 0.24 0.64 Water to 100 Organic solvent composition MEA 100 33 50 50
  • Examples 6 to 10 were repeated using the same automatic dishwashing detergent compositions but using an organic solvent composition comprising 10 ml of 2-amino-2-methyl-1-propanol and 2ml of Silwet L7600.
  • the compositions provided excellent removal of cooked-on, baked-on and burnt-on food soils.
  • Examples 11 to 15 further illustrate the use of a combination of an automatic dishwashing liquid detergent and an organic solvent composition for removing cooked-, baked- and burnt-on soils.
  • the two-component compositions of examples 11 to 15 are used to wash a load of cookware and tableware according to the procedure described hereinabove (Examples 1 to 5).
  • the automatic dishwashing liquid detergent and the organic solvent composition are delivered in separate compartments of a unit dose (30 ml of the dishwashing detergent and the 10 ml of the solvent composition) partially hydrolysed PVA water-soluble pouch.
  • the pouch is delivered to the main-wash cycle of a Bosch 6032 dishwashing machine, at 55°C without prewash.
  • Example 11 12 13 14 15 Dishwashing detergent composition KOH 14.31 14.31 14.31 11.45 4.67 H2SO4 11.26 11.26 9.00 STPP 16.00 16.00 16.00 20.00 SKTP 30.00 1,2-Propanediol 0.50 0.50 0.50 0.5 6.00 Boric acid 3.00 3.00 3.00 3.0 4.00 Polygel premix 24.40 24.40 24.40 24.00 24.40 PVPVI 0.02 SLF18 1.0 1.0 1.00 C 16 AO 0.6 0.6 2.00 2.00 ACNI 0.3 0.3 3.00 CaCl2 0.04 0.04 0.04 0.37 0.37 Na benzoate 0.61 0.61 0.61 0.61 0.61 Proxel GXL 0.05 0.05 0.05 0.05 0.05 0.05 0.05 FN3 0.60 0.60 0.60 0.60 0.90 Duramyl 0.27 0.27 0.27 Terma
  • Examples 1 to 5 were repeated using the same automatic dishwashing detergent compositions but using an organic solvent composition comprising 10 ml of 2-amino-2-methyl-1-propanol and 2ml of Silwet L7600.
  • the compositions provided excellent removal of cooked-on, baked-on and burnt-on food soils.
  • Examples 16 to 19 illustrate the use of a combination of an automatic dishwashing liquid detergent and an organic solvent composition for removing cooked-, baked- and burnt-on soils.
  • the two-component compositions are stored in a dual-compartment bottle having an electrically operated pump and delivered at a feed ratio (dishwashing liquid detergent: organic solvent composition) of 3:1.
  • the compositions of examples 16 to 19 are used to wash a dishware load according to the procedure described hereinabove (Examples 1 to 5). 30 ml of the dishwashing detergent and 10 ml of the solvent composition are separately delivered from the dual-compartment bottle to the main-wash cycle of a Bosch 6032 dishwashing machine, at 55°C without prewash.
  • Examples 20 to 24 illustrate "all-in-one" solvent-containing automatic dishwashing detergent compositions.
  • the compositions of examples 20 to 24 are used to wash a dishware load following the procedure described hereinabove (Examples 1 to 5). 40 ml of the dishwashing composition are delivered to the main-wash cycle of a Bosch 6032 dishwashing machine, at 55°C without prewash.
  • the "all-in-one" compositions of examples 20 to 24 provide excellent removal of baked-on soils.
  • Example 20 21 22 23 24 Dishwashing detergent solvent composition KOH 4.60 5.65 2.10 1.47 1.05 H2SO4 3.94 3.94 MEA 4.00 4.00 8.00 STPP 22.00 22.00 22.00 22.00 SKTP 30.00 1,2-Propanediol 0.5 0.5 6.00 5.5 5.5 Boric acid 3.00 3.00 4.00 3.4 3.4 Polygel premix 1.18 1.18 1.18 1.18 SLF18 1.0 1.0 ACNI 3.0 2.1 2.1 C 16 AO 0.40 0.308 0.308 CaCl2 0.2 0.2 0.22 0.2 0.2 Na benzoate 0.20 0.20 0.20 0.20 0.20 0.20 Proxel GXL 0.01 0.01 0.05 0.01 0.01 FN3 0.60 0.60 0.90 0.76 0.76 Duramyl 0.27 Termamyl 0.17 0.26 0.23 0.23 Perfume 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Dye 0.0024 0.0024 0.0024 0.0024 0.0024 0.0024 Water to 100

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Claims (12)

  1. Verfahren zum Entfernen von angekochten, angebackenen oder angebrannten Lebensmittelverschmutzungen von Kochgeschirr und Essgeschirr, umfassend das Waschen des Kochgeschirrs/Essgeschirrs in einer automatischen Geschirrspülmaschine in Gegenwart eines Systems aus organischen Lösungsmitteln, das einen flüchtigen organischen Anteil mit einem Dampfdruck von mehr als 13,32 Pa bei 25 °C und Atmosphärendruck von weniger als 50 Gew.-% und eine Konzentration in der Waschflotte von 100 ppm bis 10.000 ppm aufweist.
  2. Verfahren nach Anspruch 1, umfassend das Waschen des Kochgeschirrs/ Essgeschirrs auch in Gegenwart eines Tensids und eines Waschmittelbuilders und wobei das Tensid und der Waschmittelbuilder eine Konzentration in der Waschflotte von 10 ppm bis 1.000 ppm bzw. von 100 ppm bis 5.000 ppm aufweisen.
  3. Verfahren nach einem der vorstehenden Ansprüche, wobei die Konzentration in der Waschflotte des organischen Lösungsmittels im Bereich von 100 ppm bis 10.000 ppm, vorzugsweise von 200 ppm bis 8.000 ppm, mehr bevorzugt von 500 ppm bis 5.000 ppm liegt.
  4. Verfahren nach einem der vorstehenden Ansprüche, umfassend das Waschen des Kochgeschirrs/Essgeschirrs in Gegenwart einer Zusammensetzung aus organischen Lösungsmitteln und wobei die Zusammensetzung aus organischen Lösungsmitteln in einer Einheitsdosisform vorliegt, die so beschaffen ist, dass sie eine gesteuerte Freisetzung des organischen Lösungsmittels während eines oder mehrerer wiederholter Waschgänge ermöglicht.
  5. Verfahren nach einem der vorstehenden Ansprüche, umfassend das Waschen des Kochgeschirrs/Essgeschirrs in Gegenwart einer Zusammensetzung aus organischen Lösungsmitteln und wobei die Zusammensetzung aus organischen Lösungsmitteln in einer Einheitsdosisform vorliegt, die so beschaffen ist, dass sie eine verzögerte Freisetzung des organischen Lösungsmittels erst nach dem Vorwaschgang ermöglicht.
  6. Verfahren nach einem der vorstehenden Ansprüche, wobei die Zusammensetzung aus organischen Lösungsmitteln in Form einer Flüssigkeit, einer Paste, einer Creme oder eines Gels vorliegt, die bzw. das wahlweise verkapselt, in einem Ein- oder Mehrkammerbeutel verpackt oder auf ein poröses Trägermaterial absorbiert ist.
  7. Verfahren nach einem der vorstehenden Ansprüche, umfassend das Waschen des Kochgeschirrs/Essgeschirrs in einer automatischen Geschirrspülmaschine in Gegenwart einer Maschinengeschirrspülmittelzusammensetzung, umfassend ein Tensid (vorzugsweise umfassend ein schwach schäumendes nichtionisches Tensid), einen Waschmittelbuilder und eine Zusammensetzung aus organischen Lösungsmitteln in Anteilen, die ausreichen, um eine Konzentration in der Waschflotte von 10 ppm bis 1.000 ppm des Tensids, von 100 ppm bis 5.000 ppm des Waschmittelbuilders und von 100 ppm bis 10.000 ppm, vorzugsweise von 200 ppm bis 5.000 ppm, des organischen Lösungsmittels bereitzustellen.
  8. Verfahren nach einem der vorstehenden Ansprüche, wobei das organische Lösungsmittel Organoaminlösungsmittel (insbesondere Alkanolamin und mehr bevorzugt 2-Aminoalkanol) und Glycoletherlösungsmittel, vorzugsweise in einem Gewichtsverhältnis von etwa 3:1 bis etwa 1:3, umfasst und wobei das Glycoletherlösungsmittel ausgewählt ist aus Ethylenglycolmonobutylether, Diethylenglycolmonobutylether, Ethylenglycolmonomethylether, Ethylenglycolmonoethylether, Diethylenglycolmonomethylether, Diethylenglycolmonoethylether, Propylenglycolmonobutylether, Dipropylenglycolmonobutylether, Ethylenglycolphenylether und Mischungen davon.
  9. Verfahren nach Anspruch 8, wobei das Benetzungsmittel ausgewählt ist aus Silikonpolyether-Copolymeren, insbesondere Silikon-Poly(alkylenoxid)-Copolymeren.
  10. Verfahren nach einem der vorstehenden Ansprüche, wobei das organische Lösungsmittel bei über 133,32 Pa (1 mm Hg) einen Gehalt an flüchtigen organischen Verbindungen von weniger als 20 %, mehr bevorzugt weniger als 10 % aufweist.
  11. Verfahren nach einem der vorstehenden Ansprüche, wobei das organische Lösungsmittel im Wesentlichen keine Lösungsmittelbestandteile mit einem Siedepunkt von unter 150 °C, einem Flammpunkt von unter 100 °C oder einem Dampfdruck von über 133,32 Pa (1 mm Hg) aufweist.
  12. Verfahren nach einem der vorstehenden Ansprüche, wobei das organische Lösungsmittel ausgewählt ist aus:
    a) polaren, Wasserstoff bindenden Lösungsmitteln mit einem Hansen-Löslichkeitsparameter von mindestens 20 (MPa)1/2, einem Polaritätsparameter von mindestens 7 (MPa)1/2, vorzugsweise mindestens 12 (MPa)1/2, und einem H-Bindungsparameter von mindestens 10 (MPa)1/2
    b) polaren, Wasserstoff nicht bindenden Lösungsmitteln mit einem Hansen-Löslichkeitsparameter von mindestens 20 (MPa)1/2, einem Polaritätsparameter von mindestens 7 (MPa)1/2, vorzugsweise mindestens 12 (MPa)1/2, und einem H-Bindungsparameter von mindestens 10 (MPa)1/2
    c) ampiphilen Lösungsmitteln mit einem Hansen-Löslichkeitsparameter von mindestens 20 (MPa)1/2, einem Polaritätsparameter von mindestens 7 (MPa)1/2 und einem H-Bindungsparameter von mindestens 10 (MPa)1/2
    d) nichtpolaren Lösungsmitteln mit einem Polaritätsparameter von unter 7 (MPa)1/2 und einem H-Bindungsparameter von unter 10 (MPa)1/2 und
    e) Mischungen davon.
EP00986684A 2000-07-19 2000-12-21 Reinigungsmittel Revoked EP1305389B1 (de)

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PCT/US2000/019619 WO2002008370A2 (en) 2000-07-19 2000-07-19 Cleaning composition
WOPCT/US00/19619 2000-07-19
PCT/US2000/020255 WO2002008371A2 (en) 2000-02-17 2000-07-25 Cleaning composition
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PCT/US2000/034908 WO2002008375A1 (en) 2000-07-19 2000-12-21 Cleaning composition

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CA2416327C (en) 2008-07-22
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ATE395405T1 (de) 2008-05-15
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EP1305389A1 (de) 2003-05-02
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CA2414140C (en) 2008-06-03
EP1305388A1 (de) 2003-05-02
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WO2002008374A1 (en) 2002-01-31
CA2414140A1 (en) 2002-01-31
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ATE481471T1 (de) 2010-10-15
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EP1305383A1 (de) 2003-05-02
AU2001222873A1 (en) 2002-02-05
AU2001222876A1 (en) 2002-02-05
WO2002008370A2 (en) 2002-01-31
ES2280389T3 (es) 2007-09-16
ES2273742T3 (es) 2007-05-16
EP1305390A1 (de) 2003-05-02
WO2002008370A3 (en) 2003-10-16
ATE342336T1 (de) 2006-11-15
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WO2002008375A1 (en) 2002-01-31
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ES2225589T3 (es) 2005-03-16
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