DE2906891A1 - MACHINE APPLICABLE COMBINED DISHWASHING AND RINSE AID AND METHOD FOR SIMULTANEOUSLY CLEANING AND RINSING DISHES IN DISHWASHER MACHINES - Google Patents

Description

HENKELKGaA

4000 Düsseldorf, February 19, 1979 ZR-F & 'Patents

Henkelstrasse 67 Dr.Wf/Sv

Patent application

D 5919

"Machine-applicable combined dishwashing detergent and rinse aid and process for the simultaneous cleaning and rinsing of dishes in dishwashers"

The invention relates to a means for simultaneous machine cleaning and rinsing of dishes and a Process for the simultaneous cleaning and rinsing of dishes in dishwashers,

The machine cleaning of dishes is known to take place in several individual steps, generally called "courses", with one or more intermediate wash cycles with clear water between the actual cleaning cycle and the final rinse cycle in order to reduce the carryover of caustic solutions. Two different agents are usually used for the cleaning cycle and for the rinse cycle, namely a dishwashing detergent (cleaner) and a rinse aid (rinse aid) (üllmanns Encyklopadie der technischen Chemie, VA ^, (1963),

The cleaning agent has the task of swelling the food residues during the cleaning cycle of the dishwasher, removing them from the dishes and dispersing them in the cleaning solution. _Q 3 _{Q 0} 3 _{6/0 1 6 ^3/2}

Patent application D 5919 ~? ~ HENKELKGaA

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In the last rinse cycle, the dishes are washed with the addition of rinse aid. The rinse aid has a consequence its composition the task on the one hand to relax the water, so that the water has a closed, thinning film on the surface of the dishes forms, which then peeled off, and on the other hand to ensure that the dishes after drying a uniform Has gloss,

With the use of this two-part combination of a detergent and a rinse aid, in modern dishwashers Even sensitive dishes are gently and perfectly cleaned and rinsed to a shine dry. As a disadvantage but it is felt that for a good result the use of two different means is always inevitable, which should preferably also be specifically coordinated with one another.

The task was therefore to develop a product that would be used in the dishwasher at the same time and especially with a one-time addition, the task of the conventional two-part combination of a cleaner and a rinse aid.

The object is achieved by a machine-usable powdered dishwashing detergent with additional Rinsing effect with a content of condensed phosphates, Silicates, alkalis, nonionic surfactants and chlorine-releasing compounds, which are characterized by this is that it - based on the total weight of the above ingredients including any present adhering water or water of hydration - as a nonionic surfactant 0.5-5, preferably 0.8-2 percent by weight of an ethoxylated and then propoxylated

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Patent application D 5919 - % - H & sJKßL KG

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th fatty alcohol and additionally 0.2-2.5, preferably Contains 0.8-1.2 percent by weight of a water-soluble organic polymer.

The nonionic surfactants mentioned are prepared in known manner by reacting about one mole of a mixture of C ^ 2 ~ C o ₁ ~ / preferably C ^ -CJ ^ fatty alcohols having 1-4, preferably 1-2 moles of ethylene oxide and then 2-7 , preferably 4-6 moles of propylene oxide produced. 10

The water-soluble organic polymers used are polyethylene glycols with an average molecular weight between 300,000 and 4,000,000, preferably between 500,000 and 1,000,000. The polyethylene glycols are also produced in a known manner, namely, for example, by subjecting ethylene glycols to a polycondensation process. They can also be understood as condensation polymers of ethylene oxide with ethylene glycol or water. They have the general formula HOt-CH ₂ -CH ₂ -O) _n H, where η in the case of the polyethylene glycols used according to the invention can vary between 4,800 and 64,000. Such polymers are also commercially available and are sold by Union Carbon Carbide Corporation (UCC) under the name "POLYOX ^ ".

The agents according to the present invention consist, based on 100% total weight (% = weight percent), im essential from:

20 - 55, preferably 30 - 45% of a water-soluble condensed alkali metal phosphate, 3O - 6O, preferably 35 - 50% of an alkali metal

silicate,
2 - 15, preferably 5 - 10% of an alkali

hydroxide and / or an alkali metal carbonate, 0 - 8, preferably 3 - 5% of a water-soluble Alkali silicate,

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1 - 10, preferably 1 _r 5 - 5% of an active chlorine-releasing compound,

0.5-5, preferably 0.8-2% of an ethoxylated and then propoxylated fatty alcohol,

0.2-2.5, preferably 0.8-1.5% of a water-soluble polyethylene glycol with a mean molecular weight between 300,000 and 4,000,000, preferably between 500,000 and 1,000,000, as well as 0-20% water.

Condensed phosphates suitable for the purposes of the invention are the water-soluble alkali salts of di- or triphosphoric acid or the water-soluble Alkalxhexainetaphosphate, which are usually used as complexing agents in dishwashing detergents can be used.

Sodium or potassium metasilicates are used as alkali metasilicates used in which the ratio of alkali oxide to silicon dioxide is 1: 0.9 to 1: 1.5. These Compounds are preferably anhydrous. However, they can contain 4.70 to 5 moles of water of crystallization.

The alkali hydroxides or alkali carbonates are primarily sodium or potassium hydroxide or the corresponding Carbonates into consideration.

If water-soluble alkali metal silicates are also used in the mixtures, these are those in which the ratio of alkali oxide to silicon dioxide is about 1: 1.5 to 3.8 and that is generally as soda or Potash water glass are known.

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Patent application D 5919 - Sr - HENKEL KGaA

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Trichloroisocyanuric acid or its alkali metal salts, e.g. B. Potassium and sodium dichloroisocyanurate or their dihydrates or mixtures thereof are used. Keep coming also alkali and alkaline earth hypochlorites, such as lithium, sodium or calcium hypochlorite and also containing hypochlorites Complex salts, e.g. B. so-called chlorinated phosphates, trichloromelamine, chloramine T and other active chlorine releasing agents Connections into consideration. The amounts given in the context of the description of the invention relate to unless otherwise stated, to salts free from hydration.

In addition to the constituents mentioned, the claimed mixtures can optionally contain smaller amounts of further components, in particular inorganic salts such as sodium sulfate or sodium chloride. Other possible additives are buffering substances such as sodium acetate, dyes, perfumes, corrosion inhibitors such as sodium and calcium compounds, for example NaOH and Ca (OH) ₂ , zeolites and the like. As a result, the proportion of the structural substances in the agent would inevitably be correspondingly slightly reduced if all of the constituents were to be 100 percent by weight. 25th

The claimed powdery compositions can be made up in a known manner by grinding and mixing of the components. In order to achieve an intimate connection between the powder components, it may be useful to the powder during the mixing process or afterwards then with an aqueous solution of crystallizing salts, e.g. B. sodium sulfate or one of the aforementioned non-ionic Spray surfactants. This treatment also reduces the tendency of the powder to become dusty reduced.

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Patent application D 5919 -JBT- HENKELKGaA

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In order to ensure the flowability of the powder mixtures obtained over a longer period of time, one can optionally also, as described in DE-OS 21 34 695, add hydrophilic microcrystalline silica. 5

It has proven particularly advantageous to granulate the constituents of the agents according to the invention by a process proven, as described in DE-AS 28 29 114.

The detergent combinations used are characterized by their high cleaning power. You are special Suitable for removing burnt, protein-containing food residues, lipstick marks and tea stains. they are in the Position to prevent the formation of starch deposits on the surface of the dishes or existing deposits dismantle again. Particularly noteworthy is the low corrosion effect of the claimed mixtures, in particular for porcelain on-glaze decorations.

The claimed funds can be used both in domestic dishwashers and in commercial dishwashers can be used. The addition is done by hand or by means of suitable metering devices. The application concentrations in the cleaning liquor are about 0.5-10, preferably 2-5 g / l. The pH values of the cleaning liquors lie between pH 7-13, preferably pH 8-12.

The advantage of the claimed agents is that no rinse aid has to be added in the last wash cycle, but only rinsed with pure tap water and at least a rinse result is achieved

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Patent application D 5919 - 7 - HENKELKGaA

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is as good or even better than the conventional method using the two-way combination of a detergent and a rinse aid. This will make the Handling of the dishwasher is made easier because after the cleaning cycle, using the With new dishwashing detergents, it is enough to wash the dishes with clean water for a perfect wash result rinse and then dry as usual. After drying, you get a completely clean and in hygienically perfect dishes.

The present invention therefore also relates to a method for simultaneous machine cleaning and rinsing of dishes made by the use and the one-time and sole addition of the claimed means is marked in the cleaning cycle of a dishwasher.

Simplified control and saving of the dosing device for the rinse aid made it possible to make cheaper ones Build household dishwashers. The alternating load caused by the constant action of alkaline cleaners and acidic rinse aid on the dishes is eliminated; This creates porcelain on-glaze decorations, glasses, knife blades and the like spared even more than before.

However, the statements made above do not imply any restriction on the possible uses of the invention Means on such simpler dishwashers. Also in all previous dishwashers with the intended rinse aid dosage, the sole Using the claimed agents achieved excellent cleaning and rinsing results without the additional Use of the usual rinse aid.

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Patent application D 5919 - β - HENKELKGaA

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To the examples

The cleaning results and clear dry effects of the cleaning / detergent combinations claimed were in so-called normal program of a commercially available household dishwasher, a Miele G 503 tested.

To test the cleaning results, glass bowls with the burnt-on food residues of milk, Chocolate pudding or minced meat and plates with dried oatmeal or starch residues and Cups with dried-on residues of tea (according to the publication "Testing of cleaners and Rinse aid for machine dishwashing "in Seifen-Öle-Fette-Wachse, ££, (1972), pages 763 ff and 801 ff) in the household dishwasher with 3 g of detergent per liter of detergent in the cleaning cycle treated. The dirt are chosen so that Removal with other common cleaners that have a high cleaning power is only partially removed is possible in order to still have options for differentiation with these high-performance products. A point system was used for the individual evaluations, ranging from 0-10, with 0 points "without any noticeable cleaning effect" and 10 points mean "complete removal of test soiling".

To test the clear dry effects, 4 knives were used in each case made of Cjg,. ^ - chrome-nickel steel, 6 porcelain plates and 6 glass

ser 3 or 6 g / l of a standard soiling, consisting from a mixture of 100 g margarine, 50 g raw egg, 50 g spinach, 100 g skimmed milk, 100 g oat flakes, 200 g mashed potatoes and 400 g gravy, which are put directly into the Washing liquid has been added to the household dishwasher, exposed and also with 3 g detergent combination treated per liter of washing solution in the cleaning cycle. / 9

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Patent application D 5919 -U- HENKELKGaA

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A point system of 0-10 was also used for the evaluation of the clear dry effect on the glasses, with 0 points "completely inadequate clear drying (stripes, stains, etc.)" and 10 points "perfect clear drying (high-gloss Glasses without streaks and spots) ". For each mixture, duplicate tests were carried out with the Average values of the cleaning and clear dryer results determined. The mean values were also used for comparison the cleaning and clear dry effects of a commercially available rinse aid and one according to the invention Detergent combination with the use of a commercially available rinse aid determined.

The commercially available cleaner had the following composition: 36% sodium tripolyphosphate, 39% sodium metasilicate, 6% sodium carbonate, 2% sodium dichloroisocyanurate, 1% nonionic surfactant and 16% water. It was used at a concentration of 3 g / 1 liquor.
20th

The commercially available rinse aid was composed of 15% of a nonionic surfactant and 20% citric acid in an aqueous-alcoholic solution and was in one Concentration of 0.3 g / l liquor applied. 25th

example 1

It was the following with a cleaning detergent combination Composition rinsed without using a rinse aid:

37% pentasodium tr! Phosphate, 40% sodium metasilicate with a ratio

from sodium oxide to silicon dioxide like

1: 0.98j anhydrous,

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6.5% sodium carbonate; anhydrous, 3.9% soda water glass,

2.25% sodium dichloroisocyanurate. 2 H ₇ O, 1.0% C ₁₂ ~ C ₁₄ fatty alcohol, reacted with 1 mol of ethylene oxide and then with 6 mol

Propylene oxide,

1.0% polyethylene glycol MW 500,000, the remainder% water.

For comparison, with the commercially available cleaner using a commercially available rinse aid, the The recipes given in the introduction and rinsed with the commercially available detergent without using the rinse aid. The following mean values of the cleaning and clear drying results were determined from the tests:

Cleaning result se;

Removal of milk
tea

Grease pencil

25 minced meat

Chocolate pudding oatmeal starch

Cleaner after commercial practice Example I. cher cleaner with clear dishwasher 8.6 8.0 10 10 9.0 9.2 9.0 6.0 8.5 5.2 5.4 5.2 5.8 5.3

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Patent application D 5919

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Clear drying effects on knives / plates / glasses with χ g standard soiling per liter of washing solution:

10 E.

X O 3 6th Cleaner after example 1 6.0 / 8.2 / 6.8 5.5 / 8.1 / 7.7 5.6 / 7.9 / 7.7 more commercially available Cleaner with Rinse aid 5.3 / 6.5 / 7.1 5.4 / 8.6 / 7.1 6.2 / 6.8 / 6.9 more commercially available Cleaner without Rinse aid 5.2 / 6.5 / 5.7 6.1 / 7.4 / 6.1 6.0 / 7.7 / 6.0 Cleaner after Example 1 with Rinse aid 7.6 / 8.7 / 6.2 6.2 / 8.6 / 7.7 5.7 / 7.6 / 7.4

As these results show, a rinse aid is also used when using the detergent combination according to the invention superfluous, while it is absolutely necessary when using a commercially available cleaner,

Example 2

It was the following with a cleaning detergent combination Composition without using a rinse aid and rinsed with 3 g test soiling:

40.0% pentasodium triphosphate, 33.0% sodium metasilicate with a ratio from sodium oxide to silicon dioxide such as 1: 0.98j anhydrous, 5.0% sodium carbonate? anhydrous,

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1.5% trichloroisocyanuric acid,

5.0% of a low-foaming, nonionic surfactant from the ethoxylated class and propoxylated fatty alcohols with from 12 to 15 carbon atoms,

2.0% polyethylene glycol, MW 500,000,

Rest% water.

The following mean values of the cleaning and Clear dry results determined:

Cleaning results:

Removal of milk tea fat stick minced meat

Chocolate pudding oatmeal starch

Clear dry egg effect on glasses with 3 g standard soiling

Cleaner after commercial practice Example 2 cher Reini ger with clear dishwasher 8.5 8.0 10 10 8th 9.2 8th 6.0 7th 5.2 6th 5.2 6th 5.3

per liter of washing liquor:

Cleaner according to example 2:

Commercial detergent with rinse aid: Commercial detergent without rinse aid: Detergent according to example 2 with rinse aid:.

7.5 7.0 6.1 7.6

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Patent application D 5919

example

away

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In this example, as in example 2, washing was carried out with a detergent mixture without using a rinse aid. The detergent mixture had the following ingredients setting:

40.0% pentasodium triphosphate,
40.0% sodium metasilicate with a sodium oxide to silicon dioxide ratio of 1: 0.98; anhydrous,
10.0% sodium carbonate; anhydrous, 2.0% sodium hypochlorite,
2.0% water glass,

3.0% of a low-foaming, nonionic surfactant from the class of ethoxylated and propoxylated fatty alcohols with 12 to 18 carbon atoms,
0.8% polyglycol ether MW 1,000,000, remainder water.

Cleaning results s

Removal of milk tea

Grease stick minced meat chocolates

pudding porridge starch

Cleaner after commercial practice / 14 Example 3 cher Reini ger with clear dishwasher : 8.5 8.0 ; 10 10 : 9.5 9.2 : 7 6.0 : 7.5 5.2 : 6.5 5.2 : 6 5.3

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Patent application D5919 - XA - Aiff HENKELKGaA

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Clear dry effect on glasses with 3 g standard soiling per liter of washing liquor:

Cleaner according to Example 3: 7.4

Commercial detergent with rinse aid: 7.0

Common detergent without rinse aid: 6 _f O

Detergent according to example 3 with rinse aid: 7.3

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Claims (5)

Patent application D 5919-1 - HENKELKGaA ZR-FE / Patents "Machine-applicable combined dishwashing detergent and rinse aid and method for simultaneous cleaning and rinsing of dishes in dishwashers" claims 1. Machine-applicable powdered dishwashing detergent with additional rinse aid with a content of condensed phosphates, silicates, alkalis, nonionic surfactants and chlorine-releasing compounds, characterized in that it - based on the total weight of the above 'specified components including any adhering water or water of hydration present - as nonionic 0.5 - 5, preferably 0.8-2 percent by weight of an ethoxylated and subsequently propoxylated fatty alcohol and, in addition 0.2 - 2.5 preferably 0 _f 8 - contains 1.2 weight percent of a water-soluble organic polymers. 2. Means according to claim 1, characterized in that it is a nonionic surfactant reacted per mole with 1-5, preferably 1-3 moles of ethylene oxide and then with 2-7, preferably 4-6 moles of propylene oxide ^C 12 ~ ^C 18 "" ^/ preferably contains C ^ 'C ^ fatty alcohol mixture. 3. Composition according to claim 1 and 2, characterized in that it is used as a water-soluble organic polymer Polyethylene glycols with an average molecular weight between 300,000 and 4,000,000, preferably between Includes 500,000 and 1,000,000. / 2 0 30036/0163 Patent application D 5919-2 - HENKELKGaA ZR-FE / patents 4. Means according to claim 1-3, characterized in that that they essentially consist of: - 55, preferably 30-45% by weight of a water-soluble condensed alkali metal phosphate, - 60, preferably 35-40% by weight of one Alkali metasilicate, - 15, preferably 5-10 wt .-% of an alkali hydroxide and / or an alkali carbonate, - 8, preferably 3-5 wt.% Of a water soluble alkali silicate, - 10, preferably 1.5-5 wt .-% of an active chlorine-releasing compound, 0.5-5, preferably 0.8-2% by weight of an eth- oxylated and then propoxylated th fatty alcohol,
0.2-2.5, preferably 0.8-1.5% by weight of a water-soluble polyethylene glycol with an average molecular weight between 300,000 and 4,000,000, preferably between 500,000 and 1,000,000, - 20% by weight of water. 5. A method for the simultaneous machine cleaning and rinsing of dishes, characterized by the Use and the single and sole addition of the agent according to claims 1-4 in the cleaning cycle of a Dishwasher. 30036/0 163