Decontamination film forming agent for hard surfaces

Abstract

To provide a decontamination film forming agent that is capable of forming a film exhibiting a decontamination effect on a hard surface, and is capable of continuously and stably exhibiting the decontamination effect.SOLUTION: A decontamination film forming agent for hard surfaces contains a benzylalkyl (C14-16) dimethyl ammonium salt. The agent can be brought into contact with a hard surface to adhere to it, forming a decontamination film thereon.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a disinfecting film-forming agent for hard surfaces that can form a film that exhibits a disinfecting effect on a hard surface. [Background technology]

[0002] Generally, in an environment where water flows temporarily, such as inside a toilet bowl, inorganic and organic substances form insoluble salts, which serve as substrates for the formation of black stains caused by microorganisms such as bacteria and mold. Cleaning compositions used in plumbing products, which are prone to the adhesion and proliferation of such microorganisms, are generally provided with a disinfecting effect.

[0003] Various cleaning agents containing disinfecting ingredients have been developed (see, for example, Patent Document 1). However, conventional cleaning agents containing disinfecting ingredients do not provide a sustained disinfecting effect on hard surfaces and may not be able to sufficiently suppress the occurrence of blackening, so further improvements are desired. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-236293 Summary of the Invention [Problem to be solved by the invention]

[0005] The present inventors have conducted various studies on the disinfecting performance of conventional disinfecting components on hard surfaces, and have found that common disinfecting components such as benzyldodecyldimethylammonium chloride have the drawback that, even when brought into contact with a hard surface, the disinfecting component does not adhere to the hard surface and the disinfecting effect cannot be sustained. Therefore, if the disinfecting component could adhere to the hard surface and form a film, it would be expected that the disinfecting effect on the hard surface would be sustained, but no disinfecting film-forming agent capable of forming such a film has been developed to date.

[0006] Therefore, an object of the present invention is to provide a disinfecting film-forming agent that can form a film that exhibits a disinfecting effect on a hard surface and that can exert the disinfecting effect continuously and stably. [Means for solving the problem]

[0007] The present inventors have conducted extensive research to solve the above problems and have found that when benzyl alkyl (C14-C16) dimethyl ammonium salts come into contact with a hard surface, they adhere to the hard surface and remain there, forming a disinfecting film and thereby exerting a continuous and stable disinfecting effect. The present invention was completed based on this finding and through further research.

[0008] That is, the present invention provides the following aspects. Item 1. A disinfecting film-forming agent for hard surfaces, containing a benzyl alkyl (carbon number 14 to 16) dimethyl ammonium salt. Item 2. The disinfecting film-forming agent for hard surfaces according to Item 1, wherein the hard surface is a toilet bowl. Item 3. Does not contain benzyl alkyl dimethyl ammonium salts other than benzyl alkyl (carbon number 14 to 16) dimethyl ammonium salts, or Item 3. The disinfecting film-forming agent for hard surfaces according to Item 1 or 2, which contains a benzylalkyldimethylammonium salt other than benzylalkyl(C14-16)dimethylammonium salt, and the benzylalkyl(C14-16)dimethylammonium salt is present in an amount of 20 parts by weight or more per 100 parts by weight of the total amount of the benzylalkyl(C14-16)dimethylammonium salt and the other benzylalkyldimethylammonium salt. Item 4. A method for forming a disinfecting film on a hard surface, comprising contacting the hard surface with a disinfecting film-forming agent for hard surfaces, which agent contains a benzyl alkyl (carbon number 14 to 16) dimethyl ammonium salt. [Effects of the Invention]

[0009] According to the present invention, a disinfecting film coated with benzyl alkyl (carbon number: 14 to 16) dimethyl ammonium salt can be formed on a hard surface such as a toilet bowl, thereby enabling the disinfecting effect to be sustained on the hard surface and suppressing the occurrence of blackening. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1. Antibacterial film forming agent for hard surfaces The disinfecting film-forming agent of the present invention is used to form a film that exhibits disinfecting effect on a hard surface, and is characterized by containing a benzyl alkyl (C14-C16) dimethyl ammonium salt as an active ingredient. The disinfecting film-forming agent of the present invention will be described in detail below.

[0011] [Benzyl alkyl (carbon number 14-16) dimethyl ammonium salt] Benzyl alkyl (C14-16) dimethyl ammonium salts are salts of compounds in which an alkyl group having 14-16 carbon atoms (hereafter referred to as a long-chain alkyl group) and two methyl groups are bonded to the amino group of benzyl ammonium. By selecting a benzyl alkyl dimethyl ammonium salt with such a specific structure and contacting it with a hard surface, it becomes possible to form a disinfecting film on the hard surface.

[0012] The long-chain alkyl group in the benzylalkyl(C14-C16)dimethylammonium salt may be either linear or branched, but is preferably linear. The long-chain alkyl group in the benzylalkyl(C14-C16)dimethylammonium salt is preferably an alkyl group having 14 or 16 carbon atoms, more preferably an alkyl group having 16 carbon atoms.

[0013] Specific examples of the salt form of the benzylalkyl (C14 to C16) dimethylammonium salt include halide salts such as chloride, bromide, iodide, etc. Of these, chloride is preferred.

[0014] Specific examples of the benzyl alkyl (having 14 to 16 carbon atoms) dimethyl ammonium salt include benzyl tetradecyl dimethyl ammonium chloride and benzyl hexadecyl dimethyl ammonium chloride, and preferably benzyl hexadecyl dimethyl ammonium chloride.

[0015] In the disinfecting film-forming agent of the present invention, the benzyl alkyl (C14 to C16) dimethyl ammonium salt may be used alone or in combination of two or more thereof, for example, benzyl tetradecyl dimethyl ammonium salt and benzyl hexadecyl dimethyl ammonium salt may be used in combination.

[0016] The content of the benzyl alkyl (C14-16) dimethyl ammonium salt in the disinfecting film-forming agent of the present invention may be appropriately set depending on the type of hard object to be applied, the dilution ratio at the time of use, etc., and may be, for example, 0.01 to 60% by weight, preferably 0.5 to 50% by weight, more preferably 1 to 40% by weight, and even more preferably 1.5 to 30% by weight.

[0017] [Other disinfecting ingredients] The disinfecting film-forming agent of the present invention may contain other disinfecting components in addition to the benzylalkyl (C14-C16) dimethylammonium salt.

[0018] Examples of disinfecting components include benzylalkyldimethylammonium salts (other than benzylalkyl(C8-12)dimethylammonium salts), such as benzylalkyl(C8-12)dimethylammonium salts (chloride salts of compounds in which an alkyl group having 8 to 12 carbon atoms and two methyl groups are bonded to the amino group of benzylammonium) and benzylalkyl(C18-24)dimethylammonium salts (chloride salts of compounds in which an alkyl group having 18 to 24 carbon atoms and two methyl groups are bonded to the amino group of benzylammonium); benzethonium salts, such as benzethonium chloride; cetylpyridinium salts, such as cetylpyridinium chloride; chlorhexidine salts, such as chlorhexidine gluconate and chlorhexidine hydrochloride; parahydroxybenzoic acid esters; and chlorine dioxide. These disinfecting components may be used alone or in combination of two or more.

[0019] In one embodiment of the disinfecting film-forming agent of the present invention, the agent contains no or only a small amount of benzylalkyldimethylammonium salts other than benzylalkyl(C14-16)dimethylammonium salts, and specifically, the amount of benzylalkyl(C14-16)dimethylammonium salts is 20 parts by weight or more, preferably 30 parts by weight or more, more preferably 35 parts by weight or more, and even more preferably 40 parts by weight or more per 100 parts by weight of the total amount of benzylalkyl(C14-16)dimethylammonium salts and other benzylalkyldimethylammonium salts.

[0020] [Surfactants] The disinfecting film-forming agent of the present invention may contain a surfactant as a cleaning component. The type of surfactant used in the present invention is not particularly limited, and may be any of a nonionic surfactant, a cationic surfactant, an anionic surfactant, and an amphoteric surfactant.

[0021] Examples of nonionic surfactants include polyoxyalkylene alkyl ethers (polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers), polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbit fatty acid esters, polyglycerin fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyethylene glycol fatty acid esters, propylene glycol mono fatty acid esters, alkyl polyhydric alcohol ethers, polyoxyalkylene block polymers, polyoxyethylene alkylphenyls, polyoxyethylene alkylamines, fatty acid alkanolamides, acylmethylglucamides, polyoxyethylene acetylene glycol, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene phytosterols, polyoxyethylene cholestanol, polyoxyethylene nonylphenyl formaldehyde condensates, alkyl glucosides, and the like.

[0022] Examples of cationic surfactants include amidoamine salt surfactants such as stearic acid diethylaminoethylamido glutamate and lanolin fatty acid diethylaminoethylamido glutamate; and amidoguanidine salt surfactants such as lauric acid amidoguanidine hydrochloride.

[0023] Examples of anionic surfactants include alkylbenzenesulfonates, alkenylsulfonates (α-olefinsulfonates), alkylsulfoacetates, alkyl sulfates, alkanesulfonates, higher fatty acid salts, alkyl ether carboxylates, N-acylamine salts, higher fatty acid amide sulfonates, and polyoxyethylene fatty acid phosphate esters.

[0024] Examples of amphoteric surfactants include betaine-type amphoteric surfactants such as alkyldimethylaminoacetic acid betaine; amino acid-type amphoteric surfactants; and amine oxide-type amphoteric surfactants.

[0025] These surfactants may be used alone or in combination of two or more.

[0026] The content of the surfactant in the disinfecting film-forming agent of the present invention may be appropriately set depending on the type of surfactant used, the dilution ratio at the time of use, etc., and may be, for example, 10 to 60% by weight, preferably 20 to 55% by weight, and more preferably 30 to 50% by weight.

[0027] [Other ingredients] The disinfecting film-forming agent of the present invention may contain other additives and bases in addition to the above-mentioned components, such as water, lower monohydric alcohols, polyhydric alcohols, surfactants, bleaches, fragrances, deodorizers, colorants, solubilizers, disinfectants, chelating agents, extenders, solubility adjusters, fillers, pH adjusters, thickeners, inorganic builders, organic builders, enzymes, etc.

[0028] [Other ingredients] The form of the disinfecting film-forming agent of the present invention is not particularly limited, and may be, for example, any of a liquid, solid (powder, tablet, etc.), semi-solid (paste, gel, etc.) and the like.

[0029] [Usage / Usage form] The disinfecting film-forming agent of the present invention is used for the purpose of supplying a benzyl alkyl (C14-16) dimethyl ammonium salt to a hard surface to form a disinfecting film on the hard surface. In the present invention, the term "disinfecting film" refers to a state in which the benzyl alkyl (C14-16) dimethyl ammonium salt adheres to the hard surface, resulting in the hard surface being coated with the benzyl alkyl (C14-16) dimethyl ammonium salt.

[0030] The hard surfaces to which the disinfecting film-forming agent of the present invention can be applied are not particularly limited, as long as they are surfaces on which the formation of a disinfecting film is desired, and examples include hard surfaces that can come into contact with water, such as toilets (toilet bowls, toilet floors), bathrooms, kitchens, galleys, drainpipes, water storage facilities (swimming pools, artificial ponds, etc.), etc. Among these, flush toilet bowls are prone to feces adhesion and are therefore strongly desired to be provided with a disinfecting effect, so the disinfecting film-forming agent of the present invention is preferably used for flush toilet bowls.

[0031] To form a disinfecting film on a hard surface using the disinfecting film-forming agent of the present invention, the disinfecting film-forming agent of the present invention may be brought into contact with the hard surface.

[0032] To bring the disinfecting film-forming agent of the present invention into contact with a hard surface, the disinfecting film-forming agent of the present invention may be diluted with water as needed and sprayed, applied, or passed through running water onto the hard surface. When bringing the disinfecting film-forming agent of the present invention into contact with the hard surface, brushing with a brush may be performed as needed.

[0033] Furthermore, when the disinfectant film forming agent of the present invention is applied to a toilet bowl, it is preferably diluted with toilet flush water (tap water flushed into the toilet bowl) before use. In such cases, the disinfectant film forming agent of the present invention can be used as an on-tank disinfectant film forming agent for a flush toilet, for the rim portion, or for attachment to the surface of the toilet bowl. The on-tank disinfectant film forming agent is used by being placed above the hand wash portion of a flush toilet, and when a container containing the disinfectant film forming agent comes into contact with flush water for cleaning supplied to the hand wash portion, the disinfectant film forming agent flows out of the container, and the flush water containing the disinfectant film forming agent dissolved therein is released into the toilet bowl, thereby forming a disinfectant film on the surface of the toilet bowl. The disinfectant film forming agent for the rim portion is used by being attached to the rim portion of a flush toilet, and when a container containing the disinfectant film forming agent comes into contact with flush water released into the toilet bowl, the disinfectant film forming agent flows out of the container, and the flush water containing the disinfectant film forming agent dissolved therein is released into the toilet bowl, thereby forming a disinfectant film on the surface of the toilet bowl. In the case of a disinfecting film-forming agent for attachment to the surface of a toilet bowl, the disinfecting film-forming agent in gel or solid form is attached directly to the surface of the toilet bowl, and when the toilet bowl surface comes into contact with flush water during flushing, the disinfecting film-forming agent is eluted into the flush water, thereby forming a disinfecting film on the surface of the toilet bowl.

[0034] When the disinfectant film-forming agent of the present invention is diluted with water for use, the concentration of the benzylalkyl(C14-16)dimethylammonium salt after dilution is, for example, 0.001 to 1,000 ppm, preferably 0.01 to 100 ppm, and more preferably 0.1 to 50 ppm. When the disinfectant film-forming agent of the present invention is diluted with water for use, the dilution ratio may be appropriately set so that the concentration of the benzylalkyl(C14-16)dimethylammonium salt at the time of use (after dilution) falls within the aforementioned range, and may be, for example, about 10,000 to 1,000,000 times, preferably about 20,000 to 750,000 times, and more preferably about 30,000 to 500,000 times.

[0035] 2. Method for forming antibacterial film The method for forming a disinfecting film of the present invention is a method for forming a disinfecting film on a hard surface, and is characterized by contacting the hard surface with a disinfecting film-forming agent for hard surfaces, which contains a benzyl alkyl (C14-16) dimethyl ammonium salt. The method for forming a disinfecting film of the present invention makes it possible to form a disinfecting film on the hard surface in which the benzyl alkyl (C14-16) dimethyl ammonium salt has adhered, thereby imparting an excellent disinfecting effect to the hard surface.

[0036] Specific embodiments of the method for forming a disinfecting film of the present invention are as described above in the section "1. Disinfecting film-forming agent for hard surfaces." [Example]

[0037] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0038] Test Example 1 1. Test Method Test solutions shown in Table 1 were prepared and evaluated for disinfecting film-forming ability and disinfecting effect as described below.

[0039] <Evaluation of antibacterial film formation ability> The disinfecting film forming ability was evaluated using a flush toilet with a hand-washing section above the water storage tank. The flush toilet used had a structure in which flush water from the water storage tank was released into the toilet bowl when flushed, water was supplied to the hand-washing section after flushing, and the supplied water was transferred from the hand-washing section to the water storage tank and stored there, and was configured to release approximately 8 L of flush water into the toilet bowl with each flush.

[0040] Each test solution was placed in a container for on-tank toilet cleaners, which was then placed in the hand-washing section above the flush toilet's water tank and flushed a total of 15 times, once every 1.5 hours. The container containing the test solution is a commonly used container for on-tank toilet cleaners, and is placed in the hand-washing section above the flush toilet's water tank. When water is supplied after flushing, the test solution contained therein is diluted approximately 70,000 times by the supplied water, and the diluted water is stored in the water tank as flush water.

[0041] After 15 flushes, the area of ​​the toilet bowl surface that is not submerged in water near the boundary between the water surface of the puddle and the toilet bowl is 60cm. 2 The surface of the toilet bowl was thoroughly wiped with gauze. The gauze used for wiping was immersed in an elution solution (aqueous solution containing 1% by weight of formic acid and 50% by weight of methanol) and thoroughly stirred, allowing the quaternary ammonium salts adhering to the gauze to elute into the elution solution. The amount of quaternary ammonium salts (benzyldodecyldimethylammonium chloride, benzyltetradecyldimethylammonium chloride, or benzylhexadecyldimethylammonium chloride) eluted into the elution solution was then measured using a liquid chromatograph mass spectrometer (LC-MS / MS), and the amount of quaternary ammonium salts was measured within 1 cm of the surface of the toilet bowl. 2 Adhesion amount of quaternary ammonium salt per unit area (μg / cm 2 ) was calculated and the antibacterial film-forming ability was evaluated according to the following criteria. Criteria for determining antibacterial film-forming ability ◎:Toilet surface 1cm 2 The amount of quaternary ammonium salt attached per unit area is 0.5 μg / cm 2 End ○:Toilet surface 1cm 2 The amount of quaternary ammonium salt attached per unit area is 0.1 μg / cm 2 More than 0.5μg / cm 2 less than △:Toilet surface 1cm 2 The amount of quaternary ammonium salt attached per unit area is 0.02 μg / cm 2 More than 0.1μg / cm 2 less than ×: Toilet surface 1cm 2The amount of quaternary ammonium salt attached per unit area is 0.02 μg / cm 2 less than

[0042] <Evaluation of sterilization effect> The test strain was Staphylococcus aureus (NBRC12732), and the sterilization effect was evaluated by the following method. The pre-cultured test strain was placed in SCD medium (Soybean-Casein Digest Broth "DAIGO", manufactured by Nippon Pharmaceutical Co., Ltd.) at 1.0 × 10 8 ~5.0×10 8 The bacteria were suspended at a concentration of cfu / mL to prepare bacterial suspensions. Ten mL of each test solution was dispensed into 50 mL sterile centrifuge tubes (Nippon Becton Dickinson Co., Ltd.). 0.1 mL of the bacterial suspension was then inoculated into each centrifuge tube and incubated at 25°C for 5 hours. After incubation, 0.1 mL of the culture was sampled and serially diluted with phosphate-buffered saline (Wako Pure Chemical Industries, Ltd.). 0.1 mL of the culture and each dilution was then smeared onto SCDLP agar medium (Soybean-Casein Digest Agar with Lecithin & Polysorbate 80, Nippon Pharmaceutical Co., Ltd.) and incubated at 35°C for 18–24 hours, after which the viable bacterial count was measured. A blank test was also conducted under the same conditions as above, using sterile saline (Otsuka Pharmaceutical Co., Ltd.) instead of the test solution. The disinfection activity value was calculated according to the following formula:

number

[0043] The disinfecting effect of each test solution was evaluated according to the following criteria. Criteria for determining sterilization effectiveness 〇: Disinfecting activity value is 3.0 or more △: Disinfection activity value is 1.0 to 3.0 ×: Sterilization activity value is 1.0 or less

[0044] 2. Test Results The results are shown in Table 1. In the test liquid containing benzyldodecyldimethylammonium chloride, the component did not adhere sufficiently to the toilet bowl surface, and the disinfecting effect was insufficient (Comparative Example 2). In contrast, in the test liquid containing benzyltetradecyldimethylammonium chloride and / or benzylhexadecyldimethylammonium chloride, the component adhered to the toilet bowl surface and exhibited excellent disinfecting effect. In other words, these results demonstrate that benzylalkyl (C14-C16)dimethylammonium salts form a film that remains and adheres to hard surfaces, and exhibit excellent disinfecting effect.

[0045] [Table 1]

Claims

1. A disinfecting film-forming agent for hard surfaces, comprising a benzyl alkyl (having 14 to 16 carbon atoms) dimethyl ammonium salt.

2. The disinfecting film-forming agent for hard surfaces according to claim 1, wherein the hard surface is a toilet bowl.

3. A method for forming a disinfecting film on a hard surface, comprising contacting the hard surface with a disinfecting film-forming agent for hard surfaces, the agent comprising a benzyl alkyl (having 14 to 16 carbon atoms) dimethyl ammonium salt.

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