CH631204A5 - Use of acidic phosphoric acid esters for the mechanical washing of articles having a hard surface - Google Patents

Description

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2nd

PATENT CLAIMS. The well-known rinse aid formulation

1. Use of acidic phosphoric acid esters for the ma- can also be an acidic component, an organic rapid rinsing of objects with a hard surface, carboxylic acid such as citric acid, tartaric acid or gluconic acid, characterized in that it contains a mixture of acidic OR-.

thophosphoric acid esters used, which was produced. A disadvantage of the aforementioned rinse aid formulation is by reacting phosphorus V-oxide with a mixture, the need to use a variety of different chemical consisting of a monohydric alcohol with 1-20 C atoms in order to use as foamable as possible, as well as an alkane polyol with 2 to 12 carbon atoms and 2 to 6 mes of detergent with a satisfactory rinsing effect to obtain hydroxyl groups, while maintaining a molar ratio of ten. Such detergent formulations are relatively phosphorus-V-oxide to monohydric alcohol to alkane polyol 1 10 expensive.

to 2 to 4 / n or a stoichiometric excess on the Another rinse aid is in the German Offen-

monohydric alcohol and / or the alkane polyol compared to the publication 2 144 425 and consists of aliphatic phosphorus V-oxide, and / or cycloaliphatic phosphoric acid mono- and / or where n is the number of hydroxyl groups in the alkane polyol diester with 1-8 carbon atoms per alcoholic component means, with mixing or kneading of the reaction elements of the ester, optionally in a mixture with phosphoric acid components at a temperature between 0 ° and 120 ° C. With the short-chain exclusion of moisture and / or di-phosphoric acid in the presence of an inert ester, the strong intrinsic odor of this subgas results in aesthetic reservations in the course of 1-6 hours and cooling of the reactants, especially after this ion mixture Termination of the reaction. Self-odor not to be suppressed even with strong perfuming

2. Use according to claim 1, characterized in that 20 is.

that a mixture of acidic orthophosphoric acid esters It was therefore the task to develop rinse aid

used, which by the reaction of phosphorus V-oxide with the disadvantages of the known rinse aid does not have a mixture consisting of n-butanol and ethylene glycol and is furthermore distinguished by an increased rinse aid effect or diethylene glycol or isopropanol and glycerol.

has been. 25 The use according to the invention of acidic phosphorus

3. Use according to claim 1, characterized in that acid esters for machine washing objects with a mixture of acidic orthophosphoric acid esters with a hard surface are characterized in that one is used which is obtained by reacting phosphorus V-oxide with a mixture of acidic orthophosphoric acid esters used, which was a mixture consisting of ethylene glycol and the adduct ches was prepared by reacting phosphorus V-oxide from 4 moles of ethylene oxide and 1 mole of lauryl alcohol was obtained with a mixture consisting of a monohydric alcohol. with 1-20 C atoms and an alkane polyol with 2 to 12

4. Use according to claim 1, characterized in that C atoms and 2 to 6 hydroxyl groups, provided that the acidic phosphoric acid esters are used in the rinsing liquid in a molar ratio of phosphorus V-oxide to monovalent an amount of 30-70 mg per liter . Alcohol to alkane polyol from 1 to 2 to 4 / n or a stoichiometric

35 metric excess of the monohydric alcohol and / or the alkane polyol over the phosphorus V-oxide,

where n is the number of hydroxyl groups in the alkane polyol. The present invention relates to the use of molecular, with mixing or kneading of the reaction acids, phosphoric acid esters for the mechanical rinsing of components at a temperature between 0 ° and 120 ° C. and objects with a hard surface . E.g. Dishes or the exclusion of moisture and in the presence of an inert glass or means of transport can be washed in automatic washing device gas in the course of 1-6 hours and cooling of the reagent or washing systems, the rinse aid mixture after the end of the reaction.

Do not lather the water in water and give the washware a shine- Preferably use a mixture of acidic or-

convey their dry effect. thophosphoric acid esters, which by reacting phosphorus

It is known that in automatic dishwashing, the 45 phor-V-oxide tableware cleaned with a mixture of the monohydric alcohol was obtained after the actual cleaning and alkane polyol, the monovalent dosing process in a rinse aid bath to achieve a shiny alcohol and / or the alkane polyol is present in stoichiometric excess compared to the phosphor-clear dishes with a residue-free surface after V-oxide.

delt, with the rinse aid special rinse aid according to a further preferred embodiment of the. It is desirable that this rinse aid according to the invention uses a mixture of acidic Orthophos - a good wetting power, so that the rinse water contains phosphoric esters which run off the dishes through the conversion of phosphorus V-film and no residues such as calcium oxide with a mixture. consisting of n-butanol and ethyl stains or other soiling. lenglycol or diethylene glycol or isopropanol and glycerin

The known rinse aids are generally obtained from. Instead of the above-mentioned alcohol mixtures of various chemical substances, each 55 also a mixture consisting of ethylene glycol and the substance in the rinse process has a specific function adduct of 4 moles of ethylene oxide and 1 mole of lauryl alcohol. Such rinse aids contain, for example, a kick. The acidic phosphorus wetting agents are advantageously used in the form of a wash-active substance, anionic, acid esters in the rinsing liquid in an amount of 30-70 mg of cationic or nonionic type, alcohols as foam units per liter.

bittern, an acidic component for preventing limescale. The use according to the invention has the advantage over the fog and limescale stains on the surface of the dishes, as well as known rinse aids, for example, that they may contain perfume and dye as further additives. same concentration in the rinsing liquid an improved

In German Offenlegungsschrift 1 926 684, a clear gloss effect is obtained and a slight intrinsic odor of rinse aid is disclosed, which has a water-soluble wetting agent, so that there is no need for special perfuming to cover the sulfonated condensation product from a phenol, a 65 kung of the intrinsic odor. In addition, additives contain alkylphenol or a naphthol and formaldehyde with a molecular weight determined by low-foaming wetting agents or by acidic com. Such a wetting agent, such as citric acid and the like, is preferably not relatively low-foaming, but in no way is it not required to be foamed. After all, the acidic phosphoric acid esters

3rd

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usually physiologically safe and biodegradable.

The following examples serve to explain the invention in more detail, but without restricting it thereto.

example 1

a) Preparation of the rinse aid:

333 g (4.5 mol) of n-butanol and 279 g (4.5 mol) of ethylene glycol were mixed in a 2 1 glass vessel with a stirrer under a nitrogen atmosphere and 1.8 g of phosphorous acid were added to the mixture. 639 g (225 mol) of P4O10 were then introduced into the mixture over the course of 110 minutes,

the mixture was cooled from the outside with a water-ice mixture. The temperature of the reaction mixture rose from 22 ° C to 55 ° C during the feed. After the exothermic reaction had subsided, the mixture was heated to 80 ° C. over an hour and held at 80-85 ° C. for 3 hours. After cooling, 1250 g of a colorless, viscous liquid with a content of P4O10 of 51.2% by weight, an acid number up to the 1st turning point of the titration curve at a pH of about 4.5 of 331 mg KOH / g and a total acid number up to the 2nd turning point at a pH of 9.5 of 564 mg / KOH / g. The product had a density d420 of 1.438 g / cm3. The dynamic toughness was 676 poise at 20 ° C, 65 poise at 50 ° C and 21 poise at 25 80 ° C. The product can be mixed with water in any ratio. The product also dissolves in short chain aliphatic alcohols such as e.g. Methanol, ethanol and isopropanol.

b) Use of the rinse aid:

6 smooth, cup-shaped and 6 cup-shaped drinking glasses were cleaned in a cleaning cycle in a household dishwasher and then rinsed clear with an aqueous solution of the rinse aid. In the cleaning cycle, the rinsing liquid contained 40 g / liter of a cleaning agent mixture consisting of

56% by weight pentasodium triphosphate 35% by weight sodium metasilicate 5% by weight soda

2% by weight of sodium dichloroisocyanurate dihydrate and 2% by weight of an adduct of 12 moles of ethylene oxide and one mole of a fatty alcohol with 16 carbon atoms

Following the cleaning cycle, the wash ware was rinsed clear with an aqueous solution of the rinse aid of a certain concentration and the clear shine effect on the wash ware in a reflection-free black light box, as described by Th. Altenschöpfer in “Seifen-Öle-Fette-Wwachs”, volume 98, no. 24/1972 is determined by counting the spots and streaks on the wash ware. The cleaning and rinsing process was repeated 10 times for a certain concentration of rinse aid in the rinse water and the statistical mean of the stains and streak numbers determined during the 10 rinse cycles was evaluated as the final value for the clear gloss effect. The results obtained are shown in the table, column II, the dependence of the clear gloss effect on the concentration of the rinse aid in the rinsing liquid being expressed.

Rinse aid monobutyl phosphate was used. The results obtained are shown in the table, column III.

table

Trial No.

I.

II

III

10 1

5

268

300

2nd

10th

230

274

3rd

20th

168

198

4th

30th

98

180

5

40

63

150

15 6

50

66

112

7

60

52

75

8th

70

35

73

9

80

63

91

10th

90

72

156

35

40

50

55

60

Example 2

(Comparative example)

The procedure was analogous to Example 1, but as

Column I: concentration of rinse aid in the aqueous rinse liquid (mg / liter)

Column II: Number of stains and streaks when using the rinse aid according to the example

Column III: Number of spots and streaks when using the rinse aid according to Example 2

The table shows that with the same rinse aid concentrations, the rinse aid according to the invention produces a better clear gloss effect than the known comparative product.

Example 3

Following the automatic cleaning of passenger carriages in rail transport in a car wash with rotating brushes, using a 5% by weight aqueous solution of a mixture as a cleaning agent

6% by weight of secondary Ci3-C18 alkyl sulfate, 5% by weight of nonylphenol ethoxylate with 8 mol of ethylene oxide, 2% by weight of polyglycol, 10% by weight of 35% orthophosphoric acid, 20% by weight of monomethylphosphate and 64% by weight of water were used Sprayed the window panes of the passenger car with a 0.005% by weight aqueous solution of the rinse aid according to Example 1 to achieve a clear gloss.

In the cleaning process, the trolleys passed a brush stand and were then fed to the separately arranged window spray stand, in which only the panes were sprayed with the aforementioned spray solution. The car was then parked outside to dry. In a series of tests lasting over 4 weeks, passenger coaches with various degrees of soiling were cleaned. In all cases, the window panes have an impeccable clear gloss effect without island or drop formation and do not have to be polished by hand. Water with 24 0 German hardness was used to prepare the rinse aid liquid, with the addition of complexing agents or other auxiliaries being dispensed with.

C.