FI58512C - PASTA FOER HANDTVAETT - Google Patents

Description

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For the Republic of Germany (DE) P 2UU8716-9 (71) Heising, Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (7U) Leitzinger Oy (5U) Hand washing paste - Pasta för handtvätt

The present invention relates to a new hand washing paste which is best suited for removing color stains and which contains a reducing and oxidizing agent as well as an anhydrous moisturizer and an abrasive.

German patent publication 1,031,460 describes for the first time a hand washing paste in which a wetting agent is formed only at the time of use. The acid underlying the detergent is simply processed into the oil phase by its oil solubility. For example, an acid obtained by condensing a fatty acid with sarcosine can be processed into natural vegetable oil, whereby metal soaps can be added to improve consistency. A mixture of soda ash, sodium dithionite or pumice powder can be applied to this substrate. the oil phase surrounds these inorganic bases so that it is not possible to react with the acid to form a salt. Even small amounts of water can be emulsified in this way so that they do not react too early. When this paste is applied to the hands and water is added, a neutralization process begins first, forming an effective wetting agent, as well as the evolution of sulfur dioxide.

It has now surprisingly been found that the whitening and thus cleansing effect can be substantially improved in a washing paste of similar composition, described, for example, in German Patent 1,031,460, which contains, for example, butyl glycol, Lauridite (fatty acid polydiethanolamide), Emulan (ethanane) a mixture of alcohols), hexylene glycol, tall oil, lanolin, triethanolamine, talc, Aerosil (silica) and pumice powder, if the paste additionally contains an anhydrous reducing agent and sodium perborate granules coated with silicone oil.

The particle size of the sodium perborate granulate is preferably such that it corresponds to the particle size of the pumice used and is of the order of 30 to 60 μ (DIN standard approx. G 1/2). This sodium perborate granulate must first be mixed with silicone oil, so that the weight ratio of sodium perborate to silicone oil can vary between 2: 1 and 4: 1. This mixture is then effectively mixed with another mixture consisting of an anhydrous humectant, a reducing agent and other ingredients given above. Suitable reducing agents are, for example, pyro-catechin, sodium sulphite or bisulphite, in particular, however, sodium dithionite. The reducing agent cannot react with the oxidant, sodium perborate, in the paste prepared in this way, this paste can be stored indefinitely and does not lose its reducing and oxidizing properties even after long storage. If this paste is used for washing, then a reducing and, later in time, oxidizing effect occurs first.

It would have been expected that the solubilizing effect of water, reinforced by the effect of a wetting agent, would react the reductant in the washing operation primarily with the oxidant, neutralizing both agents and eliminating the cleansing or whitening effect on the skin or fabric. In fact, however, it has been shown that when washing, the reducing agent acts first on the cleaning object and only later, after about 2-5 minutes, on the oxidant.

This double cleaning effect of the washing paste according to the invention is very important, for example in removing dirt stains which at the same time contain dyes which can only be bleached reductively or oxidatively.

Example 1 72.0 kg of granular sodium perborate are mixed with 25.0 kg of 5851 2 silicone oil 2000 (mixture I). 28.48 kg of butyl glycol, 128.55 kg of Lauridit VD, 31.0 kg of Emulan, 8.02 kg of tall oil, 40.41 kg of hexylene glycol, 196.84 kg of talc, 5.0 kg of Aerosil, 15.04 kg of lanolin, 27.5 kg of triethanolamine, 94.0 kg of sodium dithionite and 158.07 kg of pumice flour G 1/2 and mixed vigorously (mixture II).

Mixture I is combined with mixture II and mixed well.

Example 2

Cold granulate 6.1 kg of sodium perborate and 2.9 kg of silicone oil 2000 (mixture I). 21.0 kg of castor oil, 8.5 kg of fatty acid and sarcosine condensation product, 4.0 kg of aluminum palmitate and 2.0 kg of hexylene glycol (mixture II) are mixed together. At the same time, a mixture of 6.9 kg of soda ash, 15.0 kg of sodium dithionite and 33.5 kg of pumice flour is prepared (mixture III).

Mixture III is cold mixed with mixture II, after which mixture I is added to mixture II + III.