DK152586B - DIFFICULTY CLEANING OBJECTIVE - Google Patents

Description

DK 152586 B

The present invention relates to a hard surface cleanser based on short chain phosphoric acid esters and a surfactant which is suitable for removing any dirt present and the surface surface coatings caused by the water hardeners. The surfaces of the objects may e.g. consist of chromium, stainless steel, glass or ceramic material.

It is already known to use short chain phosphoric acid esters as basic products for acidic detergents such as e.g. is used for cleaning sanitary facilities, dairies, breweries, swimming pools and tiles or as clear rinses in dishwashers.

DK 152586B

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Furthermore, from technical information sheets, detergents for hard surfaces are known on the basis of complexing agents and / or surfactants, which detergents further contain abrasive or polishing agents. These detergents, however, suffer from the disadvantage that they attack sensitive surfaces more or less severely, damage them mechanically or leave so-called plaster strips and staining colors. Therefore, their use is always limited to non-sensitive materials.

Further, in DE Publication 2,249,639, acidic detergents are disclosed for which a mixture of monomethyl and monobutylphosphoric esters serves as the basis. However, these known cleaning agents have the disadvantage that they attack enamel surfaces, have only a moderate cleaning effect, and that the clear gloss effect they produce is not fully satisfactory.

It is the object of the present invention to overcome the disadvantages of the known cleaning agents.

BACKGROUND OF THE INVENTION 0.5-60% by weight of an orthophosphoric acid mono- and / or dialkyl ester, approx. 1-30% by weight of at least one nonionic surfactant, approx. 10 - 98% by weight of water and the rest perfume and / or dyes, and the present cleaning agent is characterized in that the orthophosphoric acid ester is a mono- and / or diisopropyl ester.

As the nonionic surfactant, preferably an alkylaryl polyglycol ether having 1-3 carbon atoms in the alkyl chain and / or a sodium alkyl polyglycol ether sulfate having 10-18 carbon atoms in the alkyl group and / or a fatty acid alkylolamide polyglycol ether having 2-4 carbon atoms in the alkylol group and 10-18 carbon atoms are preferably used. fatty acids stones. Suitable as nonionic surfactant is in particular an addition product from an alkylphenyloxethylate with 5 moles of ethylene oxide, the sodium salt of alkyl di and / or triglycol ether sulfate or the addition product from coconut fatty acid monoethanolamide and 5 moles of ethylene oxide.

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According to a preferred embodiment of the invention, the detergent contains 2-30% by weight of orthophosphoric acid isopropyl ester, 2-15% by weight of surfactant, 55-96% by weight water and 0.005-2.0% by weight of perfume and / or dye.

Compared to known products, the present invention has the advantage that it has a particularly good cleaning effect against proteinaceous dirt and is also capable of dissolving heavily soluble calcium salts as well as obtaining a high gloss effect on chromium and precious steel materials and an optimal drainage and clear gloss effect. on gloss surfaces. Despite the low pH value of the detergent in question here, sensitive, hard surfaces, e.g. chromed materials or enamel, not of it.

This effect could not be expected because known cleaning agents of comparable acidity attack the above materials. Furthermore, the present invention could not be expected to produce an excellent high gloss on polished metal surfaces without polishes or abrasives and to be universally suitable for treating hard surfaces in the sanitary area, such as baths and kitchens.

The present cleaning agent can in practice be used in concentrated form or diluted with water. Its preparation and operation are described in more detail in the examples below.

Example 1

To prepare a detergent according to the invention, 10 parts of orthophosphoric acid monoisopropyl ester 5 parts of an addition product of methylphenyloxethylate with 5 moles of ethylene oxide 5 parts of the sodium salt of lauryl diglycol ether sulfate 1 part of an addition product of coconut fatty acid monoethanolamide are added with 5 moles of ethylene oxide 0.5 parts of perfume and dye, the surfactants first being dissolved in water and the phosphoric acid monoisopropyl ester then stirred.

DK 152586 B

Example 2 4 In each case, 30 g of the detergent of Example 1 is applied undiluted and diluted with water in the following proportions a) 1 part detergent and 5 parts water b) 1 part detergent and 10 parts water c) 1 part detergent and 100 parts of water and the wetted surface of the sponge are laid on the surface of white enamel prepared shower heads. After 48 hours, no change in enamel is detected. In a further series of tests, the above cleaning agents are brought into contact with chrome-plated parts of taps for a period of 150 hours, so that no corrosive changes of the chromium-plated parts can also be observed.

Example 3

Aqueous solutions of the detergent are prepared from Example 1, with the diluent ratio of detergent to water being 1 to 100 and 1 to 200, respectively. The cleaning effect of the solutions produced is tested by means of a Gardner test apparatus on floor coverings soiled with green wax, and is compared to the cleaning effect of two known cleaning agents I and II. Detergent I is a commercial product based on anionic surfactants, phosphates, solvents, higher alcohols, water, perfume and dye. Detergent II is a commercial product based on anionic surfactants, nonionic surfactants, phosphates, solvents, stabilizers, water, perfumes and dyes. Of the known cleaning agents, aqueous solutions are also prepared in the dilution ratio of 1: 100 and 1: 200, respectively.

The Gardner test is conducted up to 50 strokes (brush strokes). For strokes of less than 50, the complete removal of the test grout is assessed by the value of 2. If an impeccable cleaning of 50 strokes is not achieved, the cleaning result is evaluated with the value of 1.5 or 1. The results obtained are given in Table I.

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Table I

DK 152586B

Cleaning- Dilution ratio with water

Detergent _1: 100_1: 200_ mean_pH value_Battery Value Value Number of Value Value

According to Example 1 1.3 15 2.0 50 1.5 I 8.9 25 2.0 50 1.5 II 8.7 50 1.5 50 1.0

According to Table I, at a stroke count of 15 a complete removal of the test soil can already be achieved with the cleaning agent in question.

Example 4

Six beaker glasses are rinsed in a household dishwasher for a period of 5 rinse cycles. Pr. rinse cycle 3 g of the detergent of Example 1 or 0.3 g per day are used. and then a clear gloss magnification effect on the glasses is determined visually and in such a reflection-free, black light box as described in "Seifen-Ole-Fette-Wachse", year 98, no. 24/1972, page 804. A clear gloss magnification effect is measured as the below point rating.

2 points = complete dryness of the glass without salt spots 1 point = still acceptable clear gloss, up to two drops or one drop amount and one salt spot on the glass 0 points = useless clear rinsing result.

The sum of the points awarded divided by the possible maximum number of points is the drying index (clear gloss drying effect).

The result obtained is given in Table II. In addition, Table II lists the results obtained with two commercially available Comparative Products III and IV under analogous conditions.

Commercial products III and IV are mixtures of citric acid, nonionic surfactants and water.

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Table II

DK 152586 B

Drying index _Visually Black light box

Agent of Example 1 0.78 0.53

Product III 0.50 0.41

Product IV 0.48 0.28

Example 5

The detergent of Example 1 is tested in an aqueous dilution of ca. 1: 1000 for drain and clear gloss drying effect of 10 watch glasses (diameter 12.5 cm) in a hand rinse experiment. The amount of detergent in the rinse raft is 1 g / liter. The effect obtained corresponds to the effect of commercially available handwashes V, VI and VII, as shown in Table III below.

Table III

Skyllemiddel_Klarglanseffekt_

Agent of Example 1 10 watch glass with one salt spot each

Rinse V: anionic surfactants 9 watch glasses with a salt stain each lemon juice 1 watch glass with two salt spots water, fragrances pH 3,8 rinse agent VI: anionic surfactants 9 watch glasses with a salt spot each non-ionic surfactants, 1 watch glass with two salt spots alcohol water, fragrances pH 7.3

Rinse agent VII: proteins anionic surfactants 10 watch glasses with a salt spot each water, fragrances pH 7.2

Example 6

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The solubility of CaCOg using the detergent of Example 1 is tested here. It is found that 100 g of the detergent of Example 1 dissolves 2.0 g of CaCO 2 in contact with marble, while an equivalent amount of an acidic commercial product (pH 1.9) dissolves less than 1 g CaCO 2.

Example 7 (Comparative Example) a) A cleaning agent is prepared analogous to Example 1, however, instead of orthophosphoric acid monoisopropyl ester, a mixture of orthophosphoric acid monomethyl and monobutyl esters is used in the weight ratio of 2: 1, corresponding to DE disclosure. No. 2,249,639. With this detergent, the test mentioned in Example 2 is first performed. Dilutions with water in the ratios of 1: 5 and 1:10 clearly attack the enamel, while the enamel surface exhibits only slight changes when using a 1: 100 aqueous solution.

b) In addition, the comparative detergent is subjected to a Gardner test similar to Example 3. In both cases, two tests are performed which have yielded the following results:

Dilution 1: 100 Dilution 1: 200

Stroke Value Value Stroke. Value number 50 1.5 50 1.0 50 1.0-1.5 50 1.0 c) Finally, the comparative cleaner is tested analogously to Example 5 and the clear gloss drying effect is measured. At a dilution of 1: 1000, on 1 watch glass there are 5 salt spots and on 9 watch glasses more than 5 salt spots.

Claims (1)

8 DK 152586 B Patent claims. Detergent for hard surface objects consisting of approx. 0.5-60% by weight of an orthophosphoric acid mono- and / or dialkyl ester, approx. 1-30% by weight of at least one nonionic surfactant, approx. 10 - 98% by weight of water and the rest perfume and / or dyes, characterized in that the orthophosphoric acid ester is a mono- and / or diisopropyl ester.