DK147264B - SURT UNIVERSAL CLEANER - Google Patents

Description

147264 o i

The present invention relates to an acidic, univeralized saline cleaning agent containing short-chain phosphoric acid esters, particularly those used for the maintenance of sanitary installations of ceramics, porcelain, enamel 5 and surfaces of glass, plastic, chromium and stainless steel.

German Patent Specification No. 2,144,425 discloses phosphoric acid ester-containing clear-flushing agents for machine rinsing of service or glass containing aliphatic and / or cycloaliphatic phosphoric acid mono- and / -10 or diesters of 1-8 carbon atoms per minute. alcoholic component of the ester, and optionally known per se further rinse aid ingredients, such as e.g. surfactants, perfumes and dyes.

Such clear rinses are not suitable as universal cleaning agents because they clean too poorly and at the same time cause corrosion, e.g. on enamel.

It is also known from technical information sheets to use short-chain phosphoric acid esters as basic products for acidic cleaners used for cleaning sanitary installations, vehicles of various kinds, dairies, breweries, slaughterhouses, buildings, walls, swimming pools and tiles.

However, these known cleaning agents have the disadvantage that they strongly attack sensitive surfaces, such as enamel, glass, base metals and certain plastic coatings, and may eventually destroy them. Thus, its use will always be limited to particular materials.

It is thus the object of the present invention to overcome these disadvantages.

30 Surprisingly, it has been found that detergents containing 10-20% by weight of a mixture containing phosphoric acid, citric acid and short chain phosphoric acid esters of alcohols having 1-4 carbon atoms in a weight ratio of approx. 1: 1: 1, and 2-5% by weight of at least one surfactant, consisting of an alkylamine polyglycol ether, and so much of a basic compound that the pH

ISLAND

for the aqueous solution of the constituents is approx. 2, does not have the disadvantages mentioned.

In addition, the cleaning agents may further contain 2-5% by weight of an anionic agent, preferably an alkanesulphonate and / or an alkylbenzene sulphonate. Phosphoric acid esters can be used especially phosphoric acid monoalkyl esters, of which phosphoric acid methyl and / or isopropyl esters give particularly good results. As alkylamine polyglycol ethers, first of all, tallow fatty amine polyglycol ether with 10 moles of ethylene oxide and / or coconut fat amine polyglycol ether with 8 moles of ethylene oxide can be used, and as basic compounds potassium hydroxide, NaOH, ammonia or other suitable alkaline compounds can be used.

In relation to known products, the present invention has the advantage that, in addition to having a good cleaning effect, it is also capable of dissolving heavily soluble calcium salts without, despite its low pH, even attacks sensitive surfaces as they are found in many enamel (colored enamel) or 20 forms.

This could not be foreseen as other agents of similar acidity attack such surfaces.

The present invention is used in practice in aqueous dilutions of approx. 1:10 - 1: 300.

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Example 1

To prepare a detergent according to the invention, 5 parts of monomethylphosphoric acid ester 30 parts of a mixture of equivalent amounts of H 2 PO 2 and citric acid 3 parts of alkanesulfonate 3 parts of tallow fatty amine polyglycol ether are mixed with 10 moles of ethylene oxide 4 parts of 100% potassium hydroxide and 75 parts of water U726Å in such a way that the acidic products are dissolved in the majority of the necessary water (about 70 parts) and the surfactants are stirred. Finally, the resulting mixture is adjusted with a solution of the potassium hydroxide in the rest of the water to a pH-5 of 2.0.

Example 2

A solution prepared according to Example 1 is poured into the dilution of 1:10, 1: 100 and 1: 200 as well as in concentrated 10 form on its own sponge, which lies for 24 hours on the surface of enameled shower trays in the colors white and pink. During this time, no change in surface is observed, whereas a commercial product consisting of: 10 wt.% Monomethylphosphoric ester 15 wt.% Free phosphoric acid 0.8 wt.% Citric acid 18 wt.% Detergent, residual water of the same pH up to a dilution of 1:10 in over 20 approx. 15 minutes causes a surface roughening.

Example 3 100 g of product prepared according to Example 1 is capable of dissolving 2.1 g of CaCO 3 during gas evolution.