IE43304B1

IE43304B1 - Cleansing composition

Info

Publication number: IE43304B1
Application number: IE2219/75A
Authority: IE
Original assignee: Thomae Gmbh Dr K
Priority date: 1974-10-12
Filing date: 1975-10-10
Publication date: 1981-01-28
Also published as: AT342173B; DK152377C; DK152377B; NL180851B; CH616702A5; FI752827A; DK451775A; BE834410A; IE43304L; FI58512B; SE417980B; DE2448716B2; ATA736275A; NO753437L; GB1501942A; DE2448716A1; FR2287506A1; LU73570A1; FI58512C; ES441719A1

Abstract

The cleansing action of handwashing pastes containing an anhydrous reducing agent, an anhydrous wetting agent and ground pumice can be considerably increased when they are mixed with granulated sodium perborate, which is coated with silicone oil, as oxidising agent.

Description

The present invention relates to a new cleansing composition particularly suitable for removing dye stains.

German Patent Specification No. 1,031,460 describes a handwashing paste wherein the wetting agent is not formed until the moment of use. In this paste, the acid on which the active detergent substance is based is easily incorporated into an oil phase, owing to its solubility in oil. For example, the acid obtained by condensing a fatty acid with sarcosine can be incorporated in a natural vegetable oil, such as castor oil, optionally in combination with metal soaps to improve the consistency. To this basic substance, a mixture of sodium carbonate, sodium dithionate and pumice powder may then be added. These inorganic basic substances are surrounded by the oil phase in such a way that reaction with an acid, to form salts, is not possible. Even small quantities of water are emulsified in such a way that they, too, are unable to effect premature occurrence of the reaction. Not until this paste is applied to the hands and water is added does the neutralisation process set in, forming the active wetting agent and the development of sulphur dioxide begin.

Surprisingly, it has now been found that the bleaching and cleaning activity of a cleansing composition of similar compositions to that described in German Patent Specification No. 1,031,460 is substantially increased by including in the paste, as an oxidising agent granulated sodium perborate coated with silicone oil. 4330 4 According to one feature of the present invention there is provided a cleansing composition comprising an anhydrous reducing agent and a silicone oil-coated sodium perborate granulate.

The sodium perborate granulate preferably has a particle size of 5 from 30 to 60 μ (DIN standard size approx. G 1/2). The ratio by weight of sodium perborate to silicone oil is preferably from 2:1 to 4:1.

One suitable reducing agent is catechol. Other suitable reducing agnets which are particularly preferred are sodium sulphite, sodium bisulphite and sodium dithionate in combination with a compound capable of forming an alkaline solution in water, sodium sulphite, sodium bisulphite and sodium dithionate only being active as reducing agents in alkaline solution. A suitable compound is, for example, sodium carbonate.

Advantageously the agent will further contain a wetting agent, preferably in the form of a soap. At least some of the wetting agent may, if desired, be present in an inactive form such as has been described above, e.g. a fatty acid condensed with sarcosine, in which case the composition will advantageously contain sodium carbonate coated with a natural vegetable oil. The composition may also include a metal soap and/or an abrasive such as, for example, pumice powder. The pumice powder preferably has a particle size corresponding to that of the sodium perborate granulate i.e. most preferably of from 30 to 60 μ. 3304 In forming the cleansing composition according to the invention it is essential to mix the sodium perborate granulate with the silicone oil before adding the reducing agent and any remaining constituents in order to avoid reaction between the oxidising and reducing agents. The coating of silicone oil on the oxidising agent enables the paste to be stored indefinitely and even after long storage periods it does not lose its reducing and oxidising properties. When the cleaning composition is brought into contact with water, first the reducing activity and later the oxidising activity becomes ) apparent.

It would be expected that, during the washing process, owing to the solvent effect of the water, the reducing agent would react first with the oxidising agent, whereby the two substances would then neutralise each other and thus fail in their cleansing or bleaching i activity on, for example, the skin or fabric. In fact, however, it has been shown that, in the washing process, the reducing agent first acts on the site to be cleaned and the oxidation agent does not become fully active until later, after about 2 to 5 minutes.

This double cleaning effect of the cleansing composition l according to the invention is of great significance, e.g. in the removal of dirt stains which also contain dyes, which can only be bleached reductively or oxidatively.

A particularly preferred form of the cleansing composition according to the invention is that of a skin cleansing composition. In this case the composition will advantageously contain, as further additional components, for example, butyl glycol, lauridite (a mixture of alkoxylated fatty acid amides), emulan (a mixture of ethoxylated fatty alcohols), hexylene glycol, pine oil, lanolin, triethanolamine, talc and/or Aerosil (trade mark amorphous silica). Such cleansing compositions are particularly useful in hand cleansing. In use, the cleansing composition is applied to the skin, following which water is also applied and the cleansing composition and water are intimately mixed for example by rubbing the hands together. The composition may also, for example, be used in a form suitable for cleaning fabrics.

According to a further feature of the present invention there is provided a method of cleansing a site which comprises applying to the site a composition as hereinbefore defined in the presence of water.

The following non-limiting examples serve to illustrate the present invention.

EXAMPLE 1 72.0 kg of granulated sodium perborate are stirred into 25.0 kg of silicone oil 2000 (Mixture I). 28.48 kg of butyl glycol, 128.55 kg of lauridite VD, 31.0 kg of emulan, 8.02 kg of pine oil, 40.41 kg of hexylene glycol, 196.84 kg of talc, .0 kg of Aerosil, 15.04 kg of lanolin, 27.5 kg of triethanolamine, 94.0 kg of sodium dithionate and 158.07 kg of pumice powder G 1/2 are intensively mixed together (Mixture II).

Mixture I is then added to Mixture II and mixed well.

EXAMPLE 2 6.1 kg of sodium perborate are granulated cold with 2.9 kg of silicone oil 2000 (Mixture I). 21.0 kg of castor oil, 8.5 kg of the condensation product of stearic acid and sarcosine, 4.0 kg of aluminium palmitate and 2.0 kg of hexylene glycol are mixed together (Mixture II).

At the same time, is prepared a mixture of 6.9 kg of calcined sodium carbonate, 15.0 kg of sodium dithionate and 33.5 kg of pumice powder (Mixture III).

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

Claims

1. A cleansing composition comprising an anhydrous reducing agent and a silicone oil-coated sodium perborate granulate.

2. A composition as claimed in claim 1 wherein the weight ratio of sodium perborate to silicone oil is from 2:1 to 4:1.

3. A composition as claimed in claim 1 or claim 2 wherein the sodium perborate granulate has an average particle, size of from 30 to 60 μ.

4. A composition as claimed in any of the preceding claims wherein the reducing agent comprises catechol.

5. A composition as claimed in any of claims 1 to 3 wherein the reducing agent comprises sodium dithionate, sodium sulphite or sodium bisulphite and a compound capable of forming an alkaline solution in water.

6. A composition as claimed in claim 5 wherein the compound capable of forming an alkaline solution in water is sodium carbonate.

7. A composition as claimed in any of the preceding claims further including a wetting agent.

8. A composition as claimed in claim 7 wherein the wetting agent is a soap.

9. A composition as claimed in claim 7 or claim 8 wherein at least some of the wetting agent is present in an inactive form capable of becoming active on mixing with water.

10. A composition as claimed in claim 9 wherein the wetting agent in inactive form is a fatty acid condensed with sarcosine and the composition contains sodium carbonate coated with a natural vegetable oil. 4330 4 Π. A composition as claimed in any of the preceding claims further containing an abrasive.

11. 12. A composition as claimed in claim 11 wherein the abrasive comprises pumice powder.

12. 13. A composition as claimed in claim 12 wherein the pumice powder has an average particle size of from 30 to 60 μ.

13. 14. A composition as claimed in any of the preceding claims in a form suitable for use as a skin-cleansing composition.

14. 15. A composition as claimed in claim 14 further containing butyl glycol, lauridite, emulan, hexylene glycol, pine oil, lanolin, triethanolamine, talc and/or amorphous silica.

15. 16. A composition as claimed in any of the preceding claims further containing a metal soap.

16. 17. A composition as claimed in claim 1 substantially as herein described.

17. 18. A composition as claimed in claim 1 substantially as herein described in Example 1 or Example 2.

18. 19. A method of cleansing a site which comprises applying to the site a composition as claimed in any of the preceding claims in the presence of water.

19. 20. A method as claimed in claim 19 wherein the site is skin.

20.

21. A method as claimed in claim 19 wherein the site is a fabric.