EP3135751B1 - Detergent composition containing a visual disinfection indicator - Google Patents

Description

The present invention is in the field of detergency solutions, in particular for washing surfaces and floors, combining a disinfectant and degreasing action. The invention more particularly relates to a detergent composition containing at least a visual indicator of the application of the product to the surface treated with the detergent.

The detergent solutions comprise a set of ingredients whose main purpose is to confer the surfactant properties, to offer an optimal contact with the surface to be cleaned, and to allow the disinfection and the degreasing of the surfaces while releasing a pleasant odor . For both domestic and professional uses, it is necessary to use detergent compositions incorporating active ingredients whose nature and concentration do not affect the health of the users. Detergents must be effective while using minimum doses of product.

One solution is to include a flow indicator, also called an indicator of application, in the composition to find out where the detergent was applied when washing a soil, for example. This type of compositions contains, for example, a visual color indicator which shows where the solution has already been applied, which avoids having to pass several times on the same zone to avoid omitting to treat zones. The amount of detergent consumed is thereby reduced. These compositions also ensure that the entire surface has been covered. Such detergent solutions are described in the patent application FR 2 948 536 . The solutions described in the application FR 2 948 536 require a control reagent to turn a colored indicator. Such a solution is complicated to implement and also requires the use of a volatile control reagent releasing vapors of ammonia, which can cause nuisance for users.

Another patent application, US 5,064,635 , discloses a detergent solution that incorporates a passage indicator, thymophthalein, a base, and a disinfectant selected from: benzalkonium chloride to be used with a nonionic surfactant, a phenol, or an alcohol. Such disinfectants do not have the capacity to eradicate all types of microbial germs in a relatively short time, ideally 5 minutes, remaining within the concentration ranges imposed by the standards. In addition, benzalkonium chloride, because of its toxicity, tends to be replaced in favor of other disinfectants.

• un halogénure d'ammonium, dans lequel l'ammonium comporte deux chaînes alkyles comportant chacune de 1 à 3 atomes de carbone et deux chaînes alkyles comportant chacune de 7 à 14 atomes de carbone ;
• un aminoalcool ;
• un alcool ;
• une base composée d'un hydroxyde métallique ;
• un séquestrant ; et
• un composé halochromique avec une zone de virage inférieur au pH de la composition.

The present invention aims to remedy the drawbacks of the prior art and concerns for this purpose, a detergent composition for disinfecting and degreasing floors and surfaces of buildings, comprising:

• an ammonium halide, wherein the ammonium has two alkyl chains each having from 1 to 3 carbon atoms and two alkyl chains each having from 7 to 14 carbon atoms;
• an amino alcohol;
• an alcohol
• a base composed of a metal hydroxide;
• a sequestrant; and
• a halochromic compound with a turning zone below the pH of the composition.

The detergent according to the invention has shown a particularly pronounced disinfecting efficiency in a relatively short time of less than ten minutes, and even in a time less than or equal to 5 minutes, which corresponds to the color change time of the halochromic compound. in the detergent composition when applied to a surface to be treated. The halochromic compound, therefore, is not only a passage indicator, it is also a real visual indicator of the action of the detergent which qualifies it as a safety indicator. The composition advantageously comprises a solvent, preferably water.

• les germes bactériens pour ce qui est de l'activité bactéricide ;
• les champignons et les levures pour ce qui est de l'activité fongicide ; et
• les virus pour ce qui est de l'activité virucide.

The ammonium halide of the composition according to the invention is advantageously an ammonium chloride. Such an ammonium chloride used in combination with a hydroxide, an alcohol, and preferably with additionally a C10-ethoxylated alcohol, eradicates:

• bacterial germs with respect to bactericidal activity;
• fungi and yeasts for fungicidal activity; and
• viruses in terms of virucidal activity.

Such a disinfecting mixture has a time of action corresponding substantially to the color change time of the halochromic compound in the detergent composition when applied to a surface to be treated, or it has finished acting before the color of the solution turns. For this purpose, the ammonium chloride is particularly preferably didecyldimethylammonium chloride.

The metal hydroxide is used to impart a basic pH to the composition, and is advantageously used in such amounts that the pH obtained is from 12 to 13. When the detergent solution is applied in contact with the ambient air, the The carbon dissolves in it sufficiently rapidly, producing carbonic acid and rapidly acidifying the medium. Under these conditions, the pH is lowered in the range of 5 to 10 minutes, producing the bend of the colored indicator. The detergent action time is therefore simultaneous with the observed color change.

• les germes bactériens, en un temps inférieur ou égal à 1 minute, pour ce qui est de l'activité bactéricide ;
• les champignons et les levures, dans ce laps de temps inférieur ou égal à 1 minute, pour ce qui est de l'activité fongicide ; et
• les virus, dans un laps de temps inférieur ou égal à 5 minutes, pour ce qui est de l'activité virucide.

The metal hydroxide is advantageously selected from alkali hydroxides, which are sodium hydroxide and potassium hydroxide. The use of soda or potash significantly enhances the virucidal action (action against viruses), with a time of action less than or equal to 5 minutes. The synergistic action of the various ingredients of the composition mentioned above, and particularly preferably of didecyldimethylammonium chloride with sodium hydroxide, makes it possible to eradicate:

• bacterial germs, in less than or equal to 1 minute, in terms of bactericidal activity;
• fungi and yeasts, in this period of time less than or equal to 1 minute, with regard to the fungicidal activity; and
• viruses, in less than or equal to 5 minutes, for virucidal activity.

A halochromic compound is a colored indicator whose color change is produced as a result of a pH change. The halochromic compound has a turning zone below the basic pH of the solution, and is advantageously chosen such that its turning zone is less than 12 pH units. The halochromic compound is advantageously chosen such that its basic form is colored and its colorless acid form. The halochromic compound is preferably a phthalein, preferably it is phenolphthalein, and more preferably thymolphthalein. The color shift is more marked when thymolphthalein is used, and thymolphthalein is not on the list of REACH potential carcinogens, unlike phenolphthalein.

The aminoalcohols, which may also be termed amino alcohols, are organic compounds that contain both an amine functional group and an alcohol functional group. Their role is to activate the disinfecting action of the ammonium halide. The amino alcohol is preferably 2-aminoethanol, which has been determined as the best partner for improving the activity of the disinfecting agents, especially the ammoniums and alcohols of the composition.

The alcohol used is preferably ethanol which imparts a complementary microbial effect to the disinfecting composition according to the invention.

The sequestering agent is a complexing agent such as ((2- (biscarboxymethylamino) ethyl) carboxymethylamino) acetic acid, or its tetrasodium salt, also known under the name EDTA (CAS number: 64-02-8). Preferably, the sequestering agent is methyl glycine diacetate (MGDA) or a chelating agent such as N, N-diacetic acid glutamic acid (GLDA) - CAS No. 51981-21-6 - or a salt thereof . N, N-diacetic glutamic acid or methyl-glycine diacetate have the advantage of being relatively harmful compared to EDTA, and N, N-diacetic glutamic acid is particularly preferred because it increases the porosity of cells significantly and significantly promotes the penetration of active against viruses or bacteria.

• 0,5 à 1,5% de chlorure de didécyldiméthylammonium ;
• 0,5 à 5 % de 2-aminoéthanol ;
• 5 à 15 % d'éthanol ;
• 0,1 à 1 % de soude ;
• 0,5 à 3 % d'acide glutamique N,N-diacétique ; et
• 0,01 à 0,08% de thymolphtaléine ;

les pourcentages correspondant à des pourcentages massiques par rapport à la masse totale de la composition.Advantageously, the composition according to the present invention comprises:

• 0.5 to 1.5% of didecyldimethylammonium chloride;
• 0.5 to 5% 2-aminoethanol;
• 5 to 15% ethanol;
• 0.1 to 1% sodium hydroxide;
• 0.5 to 3% N, N-diacetic glutamic acid; and
• 0.01 to 0.08% thymolphthalein;

the percentages corresponding to percentages by weight relative to the total mass of the composition.

The present invention also relates in another aspect to a use of the detergent composition as described above in the context of the invention, after dilution in water, for the cleaning and disinfection of floors and surfaces and visual inspection of said cleaning and said disinfection.

The examples of embodiments that are cited following the present description are in no way limiting, they are just described for a purely illustrative purpose.

EXPERIMENTAL PART :

Example of disinfectant composition according to the invention:

EXAMPLE:

The pH of the solution is 12.7 Last name Quantity in% CAS No. didecyldimethylammonium chloride 0.8 7173-51-5 2-amethanol 3 141-43-5 Ethanol 8 64-17-5 Welded 0.5 1310-73-2 N, N-diacetic glutamic acid 2 51981-21-6 thymolphthalein 0.06 125-20-2 Water qs - -

Claims (11)

1. Detergent composition for disinfecting and degreasing building surfaces and floors, comprising:

   - an ammonium halide, in which the ammonium comprises two alkyl chains each comprising from 1 to 3 carbon atoms and two alkyl chains each comprising from 7 to 14 carbon atoms;

   - an amino alcohol;

   - an alcohol;

   - a base composed of a metal hydroxide;

   - a sequestrant; and

   - a halochromic compound with a transition range below the pH of the composition.
2. Detergent composition according to Claim 1, in which the ammonium halide is a chloride.
3. Detergent composition according to Claim 2, in which the ammonium chloride is didecyldimethylammonium chloride.
4. Detergent composition according to one of Claims 1 to 3, in which the metal hydroxide is chosen from the bases sodium hydroxide and potassium hydroxide.
5. Detergent composition according to one of Claims 1 to 4, in which the halochromic compound is a phthalein.
6. Detergent composition according to Claim 5, in which the phthalein is thymolphthalein.
7. Detergent composition according to one of Claims 1 to 6, in which the amino alcohol is 2-aminoethanol.
8. Detergent composition according to one of Claims 1 to 7, in which the alcohol is ethanol.
9. Detergent composition according to one of Claims 1 to 8, in which the sequestrant is glutamic acid N,N-diacetic acid.
10. Detergent composition according to one of Claims 1 to 9, comprising:

    0.5 to 1.5% of didecyldimethylammonium chloride;

    0.5 to 5% of 2-aminoethanol;

    5 to 15% of ethanol;

    0.1 to 1% of sodium hydroxide;

    0.5 to 3% of glutamic acid N,N-diacetic acid; and

    0.01 to 0.08% of thymolphthalein.
11. Use of the detergent compound according to one of Claims 1 to 10, after dilution in water, for cleaning and disinfecting floors and surfaces and for visually monitoring the safety of said cleaning and of said disinfecting.