EP2990471A1 - Stable disinfectant composition containing microcapsules - Google Patents

Abstract

Composition for surface cleaning of buildings, comprising the following ingredients expressed in weight percentage with respect to the total mass of said composition: 3 to 5% of a cationic disinfectant agent; 0.5 to 1.5% of an emulsifying agent; 3.5 to 6.5% of a nonionic surfactant; 1 to 3% of a perfume; and 1.5 to 3.5% microcapsules containing a perfume.

Description

The present invention belongs to the field of disinfectant compositions. More particularly, it is in the field of detergents incorporating disinfecting agents used in professional cleaning, such as liquid form compositions applied to floors and other surfaces for cleaning and disinfection purposes.

The liquid cleaning solutions comprise a set of ingredients which are essentially intended to confer the appropriate surfactant properties, to offer an optimal contact with the surface to be cleaned, while releasing a pleasant odor as long as possible. .

The known disinfecting compositions do not make it possible to retain the properties of the product, such as the olfactory properties, long after it has been applied to the soil. However, the pleasant odor of the disinfectant conferred by the perfumes gives the users an impression of cleanliness, and it is particularly sought compositions which retain in time the olfactory properties of the product during its spreading on the surface to be washed.

Requirement EP 2,336,286 discloses detergent compositions incorporating microcapsules for maintaining the perfume over time. However, such solutions do not have disinfecting properties. Now the presence of a disinfectant is particularly complicated in this context, because it is necessary both to keep a solution compatible with the incorporation of microcapsules well dispersed in the medium and a solution that is stable enough to allow a dispersion on a large scale. surface to be disinfected.

• 3 à 5 % d'un agent désinfectant cationique ;
• 0.5 à 1.5 % d'un agent émulsifiant ;
• 3.5 à 6.5 % d'un agent tensioactif non ionique ;
  1 à 3 % d'un parfum ;
• 1.5 à 3.5 % de microcapsules contenant un parfum.

The present invention aims at remedying the drawbacks of the prior art and for this purpose concerns a composition for cleaning the surfaces of buildings such as tiled floors, comprising the ingredients in weight percent relative to the total mass of said composition:

• 3 to 5% of a cationic disinfectant agent;
• 0.5 to 1.5% of an emulsifying agent;
• 3.5 to 6.5% of a nonionic surfactant;
  1 to 3% of a perfume;
• 1.5 to 3.5% microcapsules containing a perfume.

The inventors have discovered quite unexpectedly that such a mixture of ingredients in these proportions allowed to have the advantage of a controlled release of the perfume of the microcapsules, while maintaining the properties required for a disinfecting composition which must remain stable, homogeneous and easy to dilute and spread. The disinfecting agent used in the composition is advantageously an antiseptic and a chemical disinfectant meeting the criteria established by standards NF EN 1275 and NF EN 1276.

The cationic disinfecting agent of said disinfecting aqueous composition is advantageously a biocidal agent, that is to say that it is a biocidal disinfectant belonging to one of the five classes of disinfectant products defined by the biocide regulation. of March 10, 2014 (updated March 12, 2014). The biocidal agent confers on said composition a bactericidal and fungicidal activity according to the criteria of standards NF EN 1275 and NF EN 1276. The biocidal agent advantageously comprises an ammonium. The biocidal agent is preferably an ammonium chloride, and most preferably it is a benzalkonium chloride or a didecylammonium chloride. Benzalkonium chloride is an alkyldimethylbenzylammonium chloride with an alkyl chain having from 8 to 18 carbon atoms. Preferably, benzalkonium chloride is a compound of formula C ₁₇ H ₃₀ CIN referenced under the CAS number: 63449-41-2 (CAS number or CAS registry number in English), and marketed by the company BONNYMANS ^™ under the name BAC ^™ 50. Such a disinfecting agent is compatible with the presence of the beads to obtain a sufficiently stable composition over time, compatible with a large-scale marketing.

The didecylammonium chloride used in the context of the invention has the semi-developed formula (CH ₃ ) ₂ N (C ₁₀ H ₂₁ ) ₂ Cl, and for CAS No. 7173-51-5. It also allows to obtain a very stable composition over time.

The other biocides with a broad spectrum of activity, including bactericides and fungicides, tested in the context of the invention, in combination with the microcapsules, have not made it possible to obtain stable solutions. By comparison, the biocides belonging to the class of amine oxides, glutaraldehyde or chlorhexidine gluconate did not achieve the expected stability: it was impossible to keep a well-homogeneous solution with a single phase .

The emulsifying agent of said disinfecting aqueous composition is advantageously a nonionic surfactant, such as ethoxylated castor oil (the English name is Polyoxyl 35 hydrogenated castor oil or peg-35 hydrogenated castor oil), referenced under the number CAS: 61791-12-6 (CAS number or CAS registry number in English). Such an ethoxylated castor oil is for example sold under the name Descofix ^® CO 125, or by the company ALDRICH ^™ under the name Kolliphor ^® ELP. Thanks to such an emulsifying agent the stabilization of the composition is improved, it remains homogeneous, despite the presence of beads and disinfectant.

The nonionic surfactant is preferably a mixture of ethoxylated alcohol. Advantageously, said mixture of ethoxylated alcohol comprises a linear or branched C ₁₁ -C ₁₅ alkyl chain (i.e. containing from 11 to 15 carbon atoms). Advantageously, said ethoxylated alcohol is a mixture of poly (ethylene glycol) (12) of tridecyl ether (in English: poly (ethylene glycol) (12) tridecyl ether) comprising C ₁₁ -C ₁₄ iso-alkyl ethers. The iso-alkyl ether mixture advantageously comprises, as the main ingredient, a C ₁₃ iso-alkyl ether, and is listed under the CAS number: 24938-91-8 (CAS number or CAS registry number in English). The mixture of iso-alkyl ethers of C ₁₃ used is, for example Lutensol ^® AO 79 marketed by BASF ^™.

The ethoxylated alcohol mixture preferably comprises the compound of formula C ₁₃ H ₂₇ (OCH ₂ CH ₂ ) ₁₂ OH.

The perfume advantageously comprises a chemical compound of the terpenes class. The perfume advantageously comprises at least one compound of the chemical class of esters, aldehydes and alcohols. Preferably, the perfume comprises the mixture sold under the name LENS ^™ 26443 by FRUITAFLOR ^® . Advantageously, such a fragrance is used in an amount of 1 to 3%, e.g. 2%, in combination with ethoxylated castor oil in a range of 0.5 to 1.5%, eg 0.08% of Descofix ^® CO 125 with so that a final colloidal and opalescent solution (or a solution that is almost - or entirely - transparent) is obtained.

The microcapsules advantageously comprise from 20 to 40% perfume, from 1 to 2% of an emulsifying agent, from 2 to 4% of acetic acid and from 2 to 4% of a melamine-based polymer (percentages Weights are given here relative to the total mass of the microcapsules in the composition). The polymer prepared based on melamine is a methylated melamine-formaldehyde resin with an average molecular weight of approximately 432 and a linear formula (C ₄ H ₈ N ₂ O) _n , sold in suspension in 1% butanol under its English name. poly (melamine-co-formaldehyde) methylated "by the company ALDRICH ^™ , and referenced under the CAS number: 68002-20-0.

The microcapsules are advantageously microcapsules sold by the company EURACLI ^™ under the name Lens-neutral capsules and under the reference Microcapsules ref. The microcapsules advantageously comprise from 28 to 32% perfume.

The microcapsules used are advantageously of cationic nature and stabilized in an acid medium, perfectly compatible with the use of a nonionic agent such as those described above in the composition according to the invention.

The cationic microcapsules are advantageously inserted into the composition according to the invention at acidic pH, preferably at a pH of between 3 and 4, or even at a pH of 3.5 to 3.6. By way of comparison, compositions have been prepared at a pH greater than 4, for example 5: in this case, it is not a final solution that is colloidal and opalescent, or even transparent, which is obtained, but a solution of appearance trouble.

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 : Manufacture of the disinfectant according to the invention:

• Prepare a first mixture containing 2% of the perfume, 0.8% of the emulsifying agent and 1% of water;
• In a tank to prepare a second mixture containing 84.7% water, 4% cationic disinfectant and 5% surfactant;
• When the second mixture is homogeneous, add the first mixture and 2.5% microcapsules at a pH of 3.5 to 3.6.

Example of disinfectant composition: EXAMPLE 1

Last name Function Quantity in% Name Cial CAS No. Perfume olfactory 02.00 LENS ™ 26443 - Castor oil ethoxylated Emulsifier 00.80 Descofix ^® CO 25 61791-12-6 Compounds of quaternary ammonium ion, C ₈ -C ₁₈ alkyl benzyldimethyls, chlorides Disinfectant 04.00 BAC ™ 50 63449-41-2 Alcohols Ethoxylated C13-C15 surfactant 05.00 Lutensol ^® AO 79 24938-91-8 Water Diluent 85.70 - - microcapsules afterglow 02.50 Microcapsules ref. 07121 -

The microcapsules of Example 1 comprise from 30 to 32% perfume, from 1 to 2% of an emulsifying agent, from 2 to 4% of acetic acid and from 2 to 4% of methylated melamine-formaldehyde resin.

Tests have shown that when the cationic disinfecting agent is replaced by a nonionic agent, for example glutaraldehyde (CAS No. 111-30-8), the disinfecting composition does not have a good behavior over time, it is degrading.

Claims (10)

Composition for cleaning building surfaces, comprising the following ingredients expressed in weight percentage with respect to the total mass of said composition: 3 to 5% of a cationic disinfectant agent; 0.5 to 1.5% of an emulsifying agent; 3.5 to 6.5% of a nonionic surfactant; 1 to 3% of a perfume; and 1.5 to 3.5% microcapsules containing a perfume. A disinfectant aqueous composition according to claim 1, wherein the cationic disinfectant is a biocidal agent. A disinfectant aqueous composition according to claim 2, wherein the biocidal agent comprises a benzalkonium chloride or a didecylammonium chloride. A disinfectant aqueous composition according to claim 3, wherein the benzalkonium chloride has the formula C ₁₇ H ₃₀ CIN. A disinfectant aqueous composition according to one of claims 1 to 4, wherein the emulsifier is a nonionic surfactant. A disinfectant aqueous composition according to one of claims 1 to 5, wherein the nonionic surfactant is a mixture of ethoxylated alcohols. A disinfectant aqueous composition according to claim 6, wherein the mixture of ethoxylated alcohols comprises the compound of the formula C ₁₃ H ₂₇ (OCH ₂ CH ₂ ) ₁₂ OH. A disinfectant aqueous composition according to one of claims 1 to 7, wherein the perfume comprises a chemical compound of the terpenes class. A disinfectant aqueous composition according to one of claims 1 to 8, wherein the microcapsules comprise 20 to 40% perfume, 1 to 2% of an emulsifying agent, 2 to 4% acetic acid and 2 to 4% of a polymer prepared based on melamine. A disinfectant aqueous composition according to one of claims 1 to 9, wherein the microcapsules comprise 28 to 32% perfume.