Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/36—Organic compounds containing phosphorus
• • 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
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/33—Amino carboxylic acids
• • 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
• • 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
  • C11D7/3245—Aminoacids

Definitions

• the invention relates to a detergent for machine cleaning of dishes, the use of such a detergent for cleaning dishes and a method for machine cleaning of dishes.
• EP 0 578 666 B1 discloses, for example, an enzymatic cleaner.
• the invention has for its object to provide a cleaning agent and a method of the type mentioned above, which allow a gentle and effective cleaning of dishes.
• the cleaning agent according to the invention is designed and suitable for the automatic cleaning of dishes.
• This machine cleaning is usually done in a dishwasher.
• a dishwasher automatically cleans dishes after startup without manual intervention.
• the term crockery refers to all in the kitchen area used or usable articles accessible to such automatic cleaning, including trays, gastronorm containers and the like.
• the term dishes additionally includes other objects which are accessible to machine cleaning similar to dishes.
• suitable industrial parts may be mentioned here.
• a dishwasher has at least one wash tank. Detergent liquor can be circulated in such a wash tank and rinsed several times over the dishes located in the wash tank.
• the dishwasher may be designed as a single-tank machine into which the dishes are inserted and remains stationary during the rinsing process. It is preferably a machine with automatic dish transport (for example, a belt or box transport machine) in the harness at intervals or preferably is driven continuously through the dishwasher during the cleaning process.
• Such a machine can also be designed as a single-tank machine or preferably as a multi-tank machine with at least two washing tanks.
• Chelating agents are chemical compounds that form chelate complexes with metal ions.
• Aminopolycarboxylic acids and aminopolyphosphonic acids are chelating agents known to the person skilled in the art.
• a general term is used for acids, the term encompasses according to the invention the salts of the corresponding acids.
• the acids will generally be in the form of their salts, they can be used from the outset in the form of salts.
• Polymeric dispersing aids help to disperse detached soil particles in the solution and thus to keep them in suspension and prevent redeposition on the surface of the cleaned dishes.
• the cleaning agent according to the invention will initially be present as a sales form in a preferably liquid formulated concentrate, which is diluted with water to form a ready-to-use diluted cleaning solution or cleaning agent liquor.
• a ready-to-use diluted cleaning solution or cleaning agent liquor can already be present in the concentrate, alternatively it can be present in the ready-to-use diluted cleaner liquor. It is preferably present in the concentrate as well as after its dilution to a ready-to-use detergent solution.
• the cleaning agent according to the invention is enzyme-free and bleach-free.
• free of ingredients means that these corresponding ingredients are not added to the cleaning agent in a targeted manner and thus are not contained therein or at most are normally contained as industrial scale impurities.
• Bleaching agents are defined in Ullmann's Encyclopedia of Industrial Chemistry, 6th Edition, Vol. 5, p. 411ff , According to the invention, the cleaning agent is preferably in particular free of reactive chlorine compounds with bleaching action.
• the invention has recognized that the inventive combination of features makes it possible to provide a cleaning agent which is highly effective, in particular, in commercial dishwashing, which is mildly alkaline and thus less aggressive and can dispense with potentially environmentally harmful ingredients.
• the invention The chelating agents used (aminopolycarboxylic acids and aminopolyphosphonic acids) are environmentally compatible in comparison with chelating agents customary in the prior art, such as, for example, EDTA or NTA.
• the combination according to the invention can remove conventional impurities such as starch, tea and coffee residues within the scope of conventional commercial dishwashing even without high and thus aggressive alkalinity, without enzymes and without bleaching agents in the commercial kitchen sector.
• no detergent is known that can provide a corresponding cleaning performance waiving the said ingredients.
• the invention makes it possible to provide a cleaning agent which meets the criteria for the EU Ecolabel in accordance with Regulation (EC) No. 66/2010 and the Commission decision of 14 November 2012 laying down the ecological criteria for the award of the EU Ecolabel for industrial and institutional machine dishwashing detergents (2012/720 / EU) and still provide the required cleaning performance.
• EC Regulation
• 66/2010 the Commission decision of 14 November 2012 laying down the ecological criteria for the award of the EU Ecolabel for industrial and institutional machine dishwashing detergents (2012/720 / EU) and still provide the required cleaning performance.
• the combination according to the invention provides a cleaning agent which enables effective machine cleaning of dishes, in particular in the commercial sector, without ingredients considered essential in the prior art.
• the cleaning agent according to the invention preferably contains both aminopolycarboxylic acids and aminopolyphosphonic acids as well as polymeric dispersing aids.
• the cleaning agent is free of several of these ingredients, more preferably it does not contain any of the ingredients mentioned.
• surfactants refers to surfactants as defined in Ullmann's Encyclopedia of Industrial Chemistry, 6th Edition, Vol. 35, p. 293ff in the section "Surfactants”.
• Phosphates are salts and esters of phosphoric acid including their condensates or polymers.
• Biocides are active substances and preparations which contain one or more active substances, in the form in which they reach the user, and which are intended to destroy, deter, render harmless, prevent damage by them chemically or biologically or to combat it in another way (Article 2 of Directive 98/8 / EC of the European Union Parliament and of the Council of 16 February 1998 concerning the placing of biocidal products on the market).
• Dyes are colorants acc. DIN 55943, in particular soluble dyes.
• aminopolycarboxylic acids and / or aminopolyphosphonic acids may preferably be tridentate or tetradentate according to the invention.
• MGDA methylglycine-N, N-diacetic acid
• GLDA glutmic acid-N, N-diacetic acid
• NTA as an impurity in the MGDA and GLDA used is preferably not present or at most in concentrations of less than 1% by weight in the raw material used and less than 0.1% by weight in the cleaning agent according to the invention.
• the cleaning agent according to the invention preferably fulfills the criteria for the EU Ecolabel according to Regulation (EC) No. 66/2010 and the Commission's decision of 14 November 2012 establishing the ecological criteria for the award of the EU Ecolabel for industrial industrial dishwashing detergents and institutional area (2012/720 / EU).
• the total content of phosphates and other phosphorus compounds shall not exceed the following limit values, measured in grams of phosphorus per liter of water, at the maximum intended dosage of the detergent according to the invention: Soft water (0-6 ° dH): 0.15 g / l Medium hard water (7-13 ° dH): 0.30 g / l Hard water (> 14 ° dH): 0.50 g / l
• aminopolyphosphonic acids preferably comprise ATMP (amino-tris (methylenephosphonic acid) or salts thereof.
• a preferred polymeric dispersing aid comprises polyacrylic acids and / or polymethacrylic acids, or salts thereof. These molar masses preferably have between 2,000 and 20,000, more preferably 4,000 and 15,000, more preferably 6,000 and 10,000.
• the cleaning agent preferably additionally contains a corrosion inhibitor. It may be a substance that binds or complexes iron ions and thus inhibits corrosion. Preferred is a phosphonocarboxylic acid, more preferred is PBTC (2-phosphonobutane-1,2,4-tricarboxylic acid). Here too, salts may optionally be used or are preferred.
• the cleaning agent preferably contains an alkali source, preferably an alkali metal hydroxide, more preferably KOH.
• the pH may be adjusted as desired, more preferably in the range of 9-11 and about 10, respectively.
• Calculated as KOH means that the proportion by weight of the alkali source used is converted by its hydroxy groups into the equivalent amount of KOH.
• Such a concentrate can be diluted with water to a cleaner solution or cleaner fleet. It can be used in this detergent liquor in a concentration of 0.1 to 2 wt .-%, preferably 0.1 to 1 wt .-%, more preferably 0.2 to 0.5 wt .-% are used.
• the absolute concentrations of the respective ingredients, if present, are thus preferably in a range which is smaller by a factor of 50-1,000, more preferably 100-1,000, further preferably 200-500, than the preferred absolute weight proportions of the one described above concentrate.
• the absolute weights to be calculated therefrom in the cleaning liquor used are expressly likewise the subject matter of the disclosure of the present patent application.
• the invention also relates to the use of a cleaning agent according to the invention for cleaning dishes, in particular for removing contaminants selected from the group consisting of coffee and tar residues and starch and protein residues of dishes.
• the optional pre-rinsing and rinsing are carried out in a manner familiar to the person skilled in the art and require no further explanation here.
• the rinsing may be followed by further steps such as drying.
• the cleaning in step b. over a period of 10 seconds to 10 minutes, more preferably 2 to 6 minutes.
• the cleaning may preferably take place at a temperature of 20 to 80 ° C, preferably 30 to 70 ° C, more preferably 50 to 70 ° C.
• the described preferred time period and preferred temperature range are independently of each other subject matter and parameters of the present invention.
• the cleaning preferably takes place in step b. with an aqueous dilution of a concentrate described above and exemplified in the following examples.
• This concentrate is preferably used in a concentration of 0.1 to 2 wt .-%, more preferably 0.1 to 1 wt .-%, more preferably 0.2 to 0.5 wt .-%.
• a recipe for a detergent according to the invention is as follows: Proportion [% by weight] Active ingredient [% by weight] PAS 8000 N, 45% 5.00 2.25 ATMP, 5% Na, 40% 5.00 2.00 MGDA, 3 Na, 40% 9.00 3.60 GLDA, 4 Na, 47% 9.00 4.23 PBTC, 50% 3.00 1.5 KOH, 45% 2.10 0.95 Water, demineralized 66,90
• the recipe ingredients are mixed and stirred for 15 min at room temperature until a clear solution is formed.
• the concentrate obtained has a pH of 10.
• Example 1 In a total of four comparative experiments, the detergent of Example 1 was tested in three different commercial dishwashing machines in comparison with the three prior art detergents mentioned. In each case identical cleaning concentrations of the cleaning agents and identical cleaning conditions (process conditions) were used and each identically polluted partial batches of contaminated dishes (contaminated with starch, protein, coffee and tar residues) cleaned. The cleaning results were evaluated by visual inspection, the differences in cleaning with the cleaning agent according to the invention are shown in the table below in the column "Result". It can be seen that the cleaning agent according to the invention achieves an improved cleaning performance despite the omission of alkalinity and enzymes, bleaches and the like.

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

Priority Applications (4)

Applications Claiming Priority (1)

Publications (2)

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Cited By (1)

Citations (6)

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• 2014
  • 2014-03-24 PL PL14161314T patent/PL2924101T3/pl unknown
  • 2014-03-24 EP EP14161314.1A patent/EP2924101B1/fr active Active
  • 2014-03-24 ES ES14161314T patent/ES2884253T3/es active Active
  • 2014-03-24 HU HUE14161314A patent/HUE055958T2/hu unknown

Patent Citations (6)

Non-Patent Citations (2)

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