JP2007314478A - Anti-microbial and microbicidal agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-microbial and microbicidal agent that has excellent anti-microbial and microbicidal activity and can express the anti-microbial and microbicidal property continuously for a long period of time, and inexpensive and hardly causing discoloration and can decrease the load on the environment. <P>SOLUTION: As an active ingredient, the anti-microbial and microbicidal agent including a slightly water-soluble zinc-containing inorganic compound having an aqueous solubility of less than 1 gram per 100 gram water at a pH of 6 to 8 and at a temperature of 25°C is added to plastic molding materials or ceramic molding materials. The anti-microbial and microbicidal agent has excellent anti-microbial and microbicidal property, since the zinc-including inorganic compound as the main component is slightly soluble in water, the anti-microbial and microbicidal property can continuously be expressed for a long period of time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to an antibacterial disinfectant, and more particularly to an antibacterial disinfectant that can be used in industrial applications.

  Conventionally, it is known to add an antibacterial disinfectant to plastic molding materials, ceramic molding materials, and the like for use around water (kitchen, bathroom, toilet, toilet, etc.).

  As such an antibacterial disinfectant, for example, a silver-based antibacterial disinfectant or a copper-based antibacterial disinfectant in which silver or copper is adsorbed on a porous carrier is known.

In addition, as an antibacterial disinfectant, for example, an antibacterial composition in which the biocidal effect of pyrithione is increased by using, for example, pyrithione and zinc sulfate or copper sulfate that easily dissolves in water has been proposed. (For example, refer to Patent Document 1).
Special table 2003-522734 gazette

  However, since the silver antibacterial disinfectant and the copper antibacterial disinfectant are likely to be discolored, there is a problem that the material to which these are added easily discolors.

  Moreover, since silver type antibacterial disinfectant is expensive, there exists a malfunction that the manufacturing cost of the material which added silver type antibacterial disinfectant increases.

  Moreover, since the copper antibacterial disinfectant is highly toxic, there is a problem that the burden on the environment increases.

  Furthermore, in the antibacterial composition described in Patent Document 1, as shown in Tables 4a and 4b of Example 5, zinc sulfate alone has a slight biocidal effect (bacteriostatic effect). When actually used as an antibacterial fungicide, it is necessary to use it together with pyrithiones.

  Accordingly, an object of the present invention is to have an excellent antibacterial sterilization property while being able to continuously exhibit the antibacterial sterilization property over a long period of time, is inexpensive, hardly causes discoloration, and reduces the burden on the environment. It is to provide an antibacterial disinfectant that can.

  In order to achieve the above object, the present inventors have intensively studied an antibacterial disinfectant that is inexpensive, hardly changes in color, and can reduce the burden on the environment. As a result of further finding out the knowledge that the compound can be used, the antibacterial bactericidal property can be expressed continuously over a long period of time while having excellent antibacterial bactericidal properties, the present invention has been completed.

That is, the present invention
(1) an antibacterial disinfectant characterized by containing a poorly water-soluble zinc-containing inorganic compound as an active ingredient,
(2) The antibacterial disinfectant according to (1), wherein the zinc-containing inorganic compound has a solubility at 25 ° C. at pH 6 to 8 of 1 g or less with respect to 100 g of water,
(3) The zinc-containing inorganic compound is at least one zinc-containing inorganic compound selected from the group consisting of zinc hydroxide, zinc oxide, zinc borate, zinc carbonate hydroxide, and zinc phosphate. The antibacterial disinfectant described in (1) or (2) is provided.

  The antibacterial disinfectant of the present invention has an excellent antibacterial disinfectant, and since the zinc-containing inorganic compound is hardly soluble in water, it is difficult to elute even when it comes into contact with water. Antibacterial bactericidal properties can be continuously expressed over a long period of time. Therefore, if the antibacterial disinfectant of the present invention is added to a material especially for water use, the antibacterial disinfectant can be continuously expressed over a long period of time while imparting excellent antibacterial disinfectant to the material. it can.

  Moreover, since the antibacterial disinfectant of the present invention is inexpensive, the production cost of the material to which the antibacterial disinfectant is added can be reduced.

  In addition, since the antibacterial disinfectant of the present invention is unlikely to cause discoloration, the discoloration of the material by the antibacterial disinfectant can be effectively prevented.

  Moreover, the antibacterial disinfectant of this invention can reduce the load with respect to an environment.

  The antibacterial disinfectant of the present invention contains a poorly water-soluble zinc-containing inorganic compound as an active ingredient.

In the present invention, examples of the zinc-containing inorganic compound include zinc hydroxides such as zinc hydroxide, zinc oxides such as zinc oxide (ZnO) and zinc peroxide (ZnO ₂ ), such as boric acid. Zinc borate such as zinc (including hydrates such as zinc borate 3.5 hydrate), for example, zinc carbonate hydroxide (basic zinc carbonate; 2ZnCO ₃ .3Zn (OH) ₂ ), Zinc carbonates such as anhydrous zinc carbonate (ZnCO ₃ ), such as zinc phosphate (including hydrates such as zinc phosphate tetrahydrate), zinc pyrophosphate (zinc pyrophosphate trihydrate, etc. And zinc phosphates such as zinc cyanide, and the like.

These zinc-containing inorganic compounds are poorly water-soluble, and more specifically, the solubility at 25 ° C. at a pH of 6 to 8 is, for example, 1 g or less, preferably 1 × 10 ^{− with} respect to 100 g of water. ^{It is 1} g or less, more preferably 1 × 10 ⁻² or less, usually 1 × 10 ⁻²⁰ g or more, preferably 1 × 10 ⁻¹⁵ g or more, and more preferably 1 × 10 ⁻¹⁰ g or more.

  In the case where the solubility of the zinc-containing inorganic compound exceeds the above range, it is easy to elute when contacted with water, and the antibacterial bactericidal property may not be continuously developed over a long period of time.

  These zinc-containing inorganic compounds are used alone or in combination.

Among these zinc-containing inorganic compounds, preferably, zinc hydroxide (solubility at 25 ° C. at a pH of 6 to 8 (hereinafter simply referred to as “solubility”)): 1 to 20 × 10 ⁻⁵ g / 100 g of water. (Literature described value)), zinc oxide (solubility: 3-5 × 10 ⁻⁴ g / water 100 g (literature described value)), zinc borate (solubility: 6 × 10 ⁻³ g / water 100 g (saturated aqueous solution is ICP) Measured value measured by emission spectroscopic analysis (hereinafter simply referred to as “actual value”)), zinc carbonate hydroxide (solubility: 2 × 10 ⁻⁵ g / 100 g of water (actual value)), zinc phosphate ( Solubility: 1 × 10 ⁻⁴ g / 100 g of water (actually measured value)) is mentioned, and zinc hydroxide, zinc oxide, zinc borate, and zinc carbonate hydroxide are more preferable.

  As such a zinc-containing inorganic compound, for example, a powdery zinc-containing inorganic compound itself can be used as an antibacterial disinfectant. In addition, the zinc-containing inorganic compound can be used, for example, by pulverizing if necessary to produce a smaller particle size.

  In addition, the zinc-containing inorganic compound is obtained by adding an alkali such as sodium hydroxide to a zinc-containing aqueous solution such as a zinc sulfate (water-soluble zinc-containing compound) aqueous solution, or a zinc-containing aqueous solution such as a zinc sulfate aqueous solution. In addition, by adding an alkali such as sodium hydroxide in the presence of phosphoric acid to deposit a water-insoluble zinc-containing inorganic compound in the form of a powder, use it after collecting it. You can also.

  In the antibacterial disinfectant of the present invention, a zinc-containing inorganic compound may be used alone, and active ingredients or additives other than the zinc-containing inorganic compound may be further added during the production of the antibacterial disinfectant.

  As an addition method, for powders (described later), for example, a method of mixing and adding using a dry mixer, for example, for a liquid agent (described later), for example, a method of mixing and adding using a disper-type mixer, a paste agent (described later) ), For example, a method of adding by mixing with a kneader-type mixer or the like.

  The above-mentioned active ingredient is not particularly limited, and examples thereof include an active ingredient having at least one of antibacterial, bactericidal, antiseptic, fungicidal and antialgal properties.

  Such an active ingredient is not particularly limited, and examples thereof include iodine compounds, triazole compounds, sulfamide compounds, bis quaternary ammonium salt compounds, quaternary ammonium salt compounds, phthalonitrile compounds, dithiol compounds. , Thiophene compounds, thiocarbamate compounds, nitrile compounds, phthalimide compounds, haloalkylthio compounds, pyridine compounds, pyrithione compounds, benzothiazole compounds, triazine compounds, guanidine compounds, urea compounds, imidazole compounds Compounds, isothiazoline compounds, nitroalcohol compounds, phenylurea compounds and the like.

  Examples of iodine compounds include 3-iodo-2-propynylbutylcarbamate (common name: IPBC), p-chlorophenyl-3-iodopropargyl formal (trade name: IF-1000, manufactured by Nagase Sangyo Co., Ltd.), 1 -[[(3-Iodo-2-propynyl) oxy] methoxy] -4-methoxybenzene, 3-bromo-2,3-diiodo-2-propenyl ethyl carbonate (trade name: Sampras, Sankyo Co., Ltd.) Etc.

  Examples of triazole compounds include 1-[[2- (2,4-dichlorophenyl) -4-n-propyl-1,3-dioxolan-2-yl] methyl] -1H-1,2,4-triazole. (Common name: propiconazole), α- [2- (4-chlorophenyl) ethyl] -α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol (common name: Tebuconazole), α- (4-chlorophenyl) -α- (1-cyclopropylethyl) -1H-1,2,4-triazole-1-ethanol (common name: cyproconazole), 1-[[2- ( 2,4-dichlorophenyl) -1,3-dioxolan-2-yl] methyl] -1H-1,2,4-triazole (common name: azaconazole) and the like.

  Examples of the sulfamide-based compound include N-dichlorofluoromethylthio-N ′, N′-dimethyl-N-phenylsulfamide (trade name: Priventol A4 / S, manufactured by Bayer), N-dichlorofluoromethylthio-N ′. , N′-dimethyl-N-4-tolylsulfamide (trade name: Priventol A5, manufactured by Bayer) and the like.

  Examples of bisquaternary ammonium salt compounds include N, N′-hexamethylenebis (4-carbamoyl-1-decylpyridinium bromide) (trade name: Dimer 38, manufactured by Inui Corporation), N, N′— Hexamethylene bis (4-carbamoyl-1-decylpyridinium acetate) (trade name: Dimer 38A, manufactured by Inui Corporation), 4,4 ′-(tetramethylenedicarbonyldiamino) bis (1-decylpyridinium bromide) (product) Name: Dimer 136, manufactured by Inui Corporation), 4,4 ′-(tetramethylenedicarbonyldiamino) bis (1-decylpyridinium acetate) (trade name: Dimer 136A, manufactured by Inui Corporation), and the like.

  Examples of the quaternary ammonium salt compounds include di-n-decyl-dimethylammonium chloride, 1-hexadecylpyridinium chloride, hexadecyltrimethylammonium bromide, hexadecyltrimethylammonium chloride, benzalkonium chloride, and coatamine D10EPR (Kao ( Etc.).

  Examples of the phthalonitrile-based compound include 2,4,5,6-tetrachloroisophthalonitrile (trade name: Nopcoside N-96, manufactured by San Nopco).

  Examples of the dithiol-based compound include 4,5-dichloro-1,2-dithiol-3-one.

  Examples of the thiophene compound include 3,3,4-trichlorotetrahydrothiophene-1,1-dioxide, 3,3,4,4-tetrachlorotetrahydrothiophene-1,1-dioxide, and the like.

  Examples of the thiocarbamate compound include tetramethylthiuram disulfide.

  Examples of the nitrile compound include 2,4,5,6-tetrachloroisophthalonitrile.

  Examples of the phthalimide compound include N-1,1,2,2-tetrachloroethylthio-tetrahydrophthalimide (Captafol), N-trichloromethylthio-tetrahydrophthalimide (Captan), N-dichlorofluoromethylthiophthalimide (Fluorolpet), N- And trichloromethylthiophthalimide (Folpet).

  Examples of the haloalkylthio compounds include N-dimethylaminosulfonyl-N-tolyl-dichlorofluoromethanesulfamide (Tolylfluoride), N-dimethylaminosulfonyl-N-phenyl-dichlorofluoromethanesulfamide (Dichlofluoride), N -(Fluorodichloromethylthio) -N, N′-dimethyl-N-phenyl-sulfamide and the like.

  Examples of the pyridine-based compound include 2,3,5,6-tetrachloro-4- (methylsulfonyl) pyridine.

  Examples of the pyrithione compound include zinc pyrithione and sodium pyrithione.

  Examples of the benzothiazole compound include 2- (4-thiocyanomethylthio) benzothiazole.

  Examples of the triazine compound include 2-methylthio-4-t-butylamino-6-cyclopropylamino-s-triazine.

  Examples of the guanidine compound include 1,6-di- (4'-chlorophenyldiguanide) -hexane, polyhexamethylene biguanidine hydrochloride, and the like.

  Examples of urea compounds include 3- (3,4-dichlorophenyl) -1,1-dimethylurea.

  Examples of the imidazole compound include methyl-2-benzimidazole carbamate (common name: MBC), methyl-2-benzimidazole carbamate hydrochloride, 2- (4-thiazolyl) -benzimidazole, and the like.

  Examples of the isothiazoline-based compound include 2-methyl-4-isothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, 5-chloro-2-n-octyl-4-isothiazolin-3-one, 4-chloro-2-n-octyl-4-isothiazolin-3-one, 4,5-dichloro-2-n-octyl-4- Examples include isothiazoline-3-one, 1,2-benzisothiazoline-3-one, and Nn-butyl-1,2-benzisothiazoline-3-one.

  Examples of the nitroalcohol compound include 2-bromo-2-nitropropane-1,3-diol, 2,2-dibromo-2-nitro-1-ethanol, and the like.

  Examples of the phenylurea compound include 3- (3,4-dichlorophenyl) -1,1-dimethylurea.

  These active ingredients are used alone or in combination.

  The additive is not particularly limited, and examples thereof include an adsorbent, a surfactant, an antioxidant, and a light stabilizer.

  The adsorbent is not particularly limited, and examples thereof include tetravalent metal phosphates.

  If the tetravalent metal forming the phosphate is a tetravalent metal, the group in the periodic table is not particularly limited. Tetravalent metals include Group 4 elements of the periodic table, such as Group 4A elements (titanium, zirconium, hafnium, thorium, etc.) and Group 4B elements (germanium, tin, lead, etc.). Among these tetravalent metals, preferably, the metal belonging to Group 4A element of the periodic table includes titanium, zirconium, hafnium, and the metal belonging to Group 4B element of the periodic table includes tin.

  In addition, in this specification, the group number of a periodic table is based on IUPAC (International Union of Pure and Applied Chemistry) inorganic chemical nomenclature committee naming rule 1970 version.

  Examples of phosphoric acid that forms a phosphate include orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, triphosphoric acid, tetraphosphoric acid, and polyphosphoric acid. Examples of the phosphate include hydrogen phosphates such as hydrogen orthophosphate.

  These tetravalent metal phosphates are used alone or in combination.

Of these, titanium pyrophosphate (TiP ₂ O ₇ ) is preferable.

  The surfactant is not particularly limited, and examples thereof include known interfaces such as soaps, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and polymer surfactants. An activator is mentioned, Preferably, a nonionic surfactant and an anionic surfactant are mentioned.

  Examples of the nonionic surfactant include polyoxyalkylene aryl phenyl ether, polyoxyethylene nonyl phenyl ether, block copolymer of ethylene oxide and propylene oxide, sorbitan fatty acid ester, sucrose fatty acid ester, and the like.

  As an anionic surfactant, for example, alkylbenzenesulfonic acid metal salt, alkylnaphthalenesulfonic acid metal salt, polycarboxylic acid type surfactant, dialkylsulfosuccinic acid ester metal salt, polyoxyethylene distyrenated phenyl ether sulfate ammonium salt, Examples thereof include lignin sulfonic acid metal salts. Moreover, as these metal salts, a sodium salt, potassium salt, magnesium salt etc. are mentioned, for example.

  These surfactants are used alone or in combination.

  The antioxidant is not particularly limited. For example, phenol-based oxidation such as 2,6-di-t-butyl-4-methylphenol and 2,2′-methylenebis [4-methyl-6-t-butylphenol]. Examples of the antioxidant include amine-based antioxidants such as alkyldiphenylamine and N, N′-di-s-butyl-p-phenylenediamine. These antioxidants are used alone or in combination.

  The light stabilizer is not particularly limited, and examples thereof include hindered amine light stabilizers such as bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate and the like, and are used alone or in combination. .

  These additives are used alone or in combination.

  In the antibacterial disinfectant of the present invention, when an active ingredient other than the zinc-containing inorganic compound is added, the blending ratio of such an active ingredient is, for example, 1 to 5000 with respect to 100 parts by weight of the zinc-containing inorganic compound. Part by weight, preferably 10 to 1000 parts by weight.

  Moreover, in the antibacterial disinfectant of the present invention, when an additive is added, the blending ratio of each additive is, for example, 1 to 5000 parts by weight for the adsorbent with respect to 100 parts by weight of the zinc-containing inorganic compound. 10 to 1000 parts by weight, preferably 0.1 to 50 parts by weight for surfactant, preferably 1 to 10 parts by weight, preferably 0.1 to 10 parts by weight for antioxidant, preferably Is 1 to 5 parts by weight, for example, 0.1 to 10 parts by weight, preferably 1 to 5 parts by weight, for a light stabilizer.

  The antibacterial disinfectant of the present invention can be used as an agent for imparting antibacterial disinfectant directly to an object to be applied (plastic molding material or ceramic molding material), that is, without being specifically molded. Furthermore, depending on the purpose and use, for example, it is formulated into a known dosage form such as a liquid (including water suspension and oil), paste, powder, granule, microcapsule, etc. and added to the application target Can also be used. In addition, it may be prepared as an inclusion compound in formulation, and further supported on montmorillonite such as layered silicate (such as smectites) or adsorbed on clay, silica, white carbon, talc, etc. You may use what was prepared by.

  The antibacterial disinfectant of the present invention is not particularly limited, and various industrial materials such as plastic molding materials and ceramic molding materials, preferably materials for water use, more specifically, plastic molding materials for water use. And can be applied to ceramic molding materials.

  Such a plastic molding material is not particularly limited, and examples thereof include resins such as thermoplastic resins and thermosetting resins. Examples thereof include (meth) acrylic resins (acrylic resins and / or methacrylic resins). , Acrylic styrene resin, styrene resin, vinyl chloride resin, vinyl acetate resin, vinyl acetal resin, fluorine resin, polyester resin, amino resin, epoxy resin, polyurethane resin, silicone resin, etc. Resin.

  The ceramic molding material is not particularly limited, and is used for, for example, a catalyst carrier, ceramic material, glass, refractory, etc., and molded by sintering, for example, a calcium phosphate compound such as hydroxyapatite, For example, oxides such as silicon oxide (silica), aluminum oxide (alumina), magnesium oxide (magnesia), titanium oxide (titania), zirconium oxide (zirconia), such as silicon nitride, titanium nitride, aluminum nitride, zirconium nitride, etc. Nitrides such as non-oxide ceramics such as silicon carbide. Further, the ceramic molding material is the above composite, for example, silicates such as calcium silicate, aluminum silicate, magnesium silicate, diatomaceous earth, for example, alumina-silica such as kaolinite, bentonite, pumice, feldspar, quartz, etc. System compounds and the like.

  Also, plastic molding materials and ceramic molding materials, especially plastic molding materials, are dissolved as a solution such as varnish by a solvent, or dispersed as a dispersion such as an emulsion or suspension (emulsion, suspension, etc.). In such a case, the antibacterial disinfectant of the present invention may be added to the solution or dispersion. In addition, it does not specifically limit as such a solvent, For example, an aqueous solvent, an organic solvent, etc. are mentioned.

  Examples of the aqueous solvent include water, alcohol solvents such as methanol and ethanol, glycol solvents such as ethylene glycol and polyethylene glycol, and ketone solvents such as acetone and methyl ethyl ketone.

  Examples of the organic solvent include ether solvents such as dioxane and tetrahydrofuran, ester solvents such as ethyl acetate and butyl acetate, aromatic solvents such as toluene and xylene, such as chloroform and methylene chloride. And halogenated hydrocarbon solvents such as polar solvents such as dimethylformamide and dimethyl sulfoxide. In addition, examples of the organic solvent include petroleum solvents such as mineral spirits that are used industrially.

  The antibacterial disinfectant of the present invention has an application target (plastic molding material or ceramic molding material) as the concentration of the zinc-containing inorganic compound, for example, about 0.005 to 5% by weight, and further 0.01 to 2% by weight. It is preferable to be added.

  The antibacterial disinfectant of the present invention has an excellent antibacterial disinfectant, and since the zinc-containing inorganic compound is hardly soluble in water, it is difficult to elute even when it comes into contact with water. Antibacterial bactericidal properties can be continuously expressed over a long period of time. Therefore, if the antibacterial disinfectant of the present invention is added to plastic molding materials and ceramic molding materials for use around water, the antibacterial disinfectant can be sustained over a long period of time while imparting excellent antibacterial disinfecting properties to these materials. Can be expressed.

  Moreover, since the antibacterial disinfectant of the present invention is inexpensive, the production cost of a material to which the antibacterial disinfectant is added, that is, a plastic molding material or a ceramic molding material can be reduced.

  Furthermore, since the antibacterial disinfectant of the present invention hardly causes discoloration, discoloration of materials (plastic molding material, ceramic molding material, etc.) due to the antibacterial disinfectant can be effectively prevented.

  Furthermore, the antibacterial disinfectant of the present invention can reduce the burden on the environment.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples.

Example 1
1.0 part by weight of zinc hydroxide as an antibacterial disinfectant, 100.0 parts by weight of paraloid A-11 (30% by weight ethyl acetate solution of thermoplastic methacrylic resin, manufactured by Rohm and Haas) as a plastic molding material And a plastic molding material to which an antibacterial disinfectant was added was obtained by stirring and mixing with a disper type mixer.

  Next, this was applied to the glass surface and then dried to produce a plastic film on the glass surface.

Example 2
A plastic molding material to which an antibacterial disinfectant was added was obtained in the same manner as in Example 1 except that 1.0 part by weight of zinc oxide was used instead of 1.0 part by weight of zinc hydroxide, and then glass A plastic film was produced on the surface.

Example 3
A plastic molding material to which an antibacterial fungicide is added by the same operation as in Example 1 except that 1.0 part by weight of zinc borate 3.5 hydrate is used instead of 1.0 part by weight of zinc hydroxide. Then, a plastic film was produced on the glass surface.

Example 4
A plastic molding material to which an antibacterial disinfectant was added was obtained in the same manner as in Example 1 except that 1.0 part by weight of zinc carbonate was used instead of 1.0 part by weight of zinc hydroxide, A plastic film was produced on the glass surface.

Example 5
A plastic molding material to which an antibacterial fungicide is added is obtained in the same manner as in Example 1 except that 1.0 part by weight of zinc phosphate tetrahydrate is used instead of 1.0 part by weight of zinc hydroxide. Then, a plastic film was produced on the glass surface.

Example 6
A plastic molding material to which an antibacterial disinfectant was added was obtained by the same operation as in Example 1 except that 0.5 part by weight of zinc hydroxide was used instead of 1.0 part by weight of zinc hydroxide, A plastic film was produced on the glass surface.

Example 7
A plastic molding material to which an antibacterial disinfectant was added was obtained in the same manner as in Example 1 except that 0.1 part by weight of zinc hydroxide was used instead of 1.0 part by weight of zinc hydroxide, A plastic film was produced on the glass surface.

Example 8
Instead of 1.0 part by weight of zinc hydroxide, 0.6 part by weight of zinc hydroxide was used, and 0.4 part by weight of titanium pyrophosphate (TiP ₂ O ₇ ) as an additive (adsorbent) was further added. Except for the above, a plastic molding material to which an antibacterial disinfectant was added was obtained in the same manner as in Example 1, and then a plastic film was produced on the glass surface.

Example 9
Instead of 1.0 part by weight of zinc hydroxide, 0.3 part by weight of zinc hydroxide was used, and 0.2 part by weight of titanium pyrophosphate (TiP ₂ O ₇ ) as an additive (adsorbent) was further added. Except for the above, a plastic molding material to which an antibacterial disinfectant was added was obtained in the same manner as in Example 1, and then a plastic film was produced on the glass surface.

Comparative Example 1
Without adding an antibacterial disinfectant, Paraloid A-11 (30 wt% ethyl acetate solution of thermoplastic methacrylic resin, manufactured by Rohm and Haas) as a plastic molding material is applied to the glass surface and then dried. This produced a plastic film on the glass surface.

(Evaluation)
(Antimicrobial test)
The plastic film produced in each example and comparative example was subjected to an antibacterial test according to JIS Z 2801 (antibacterial test method, established on December 20, 2000).

  In the antibacterial test, Escherichia coli (IFO-3044) and Staphylococcus aureus (IFO3061) were used as test bacteria. Evaluation was made by measuring the number of viable bacteria after culture. The results are shown in Table 1.

表１中、E．coliは、エスケリシア・コリー（Escherichia coli)ＩＦＯ−３０４４を示し、S．aureusは、スタフィロコッカス・アウレウス(Staphylococcus aureus)ＩＦＯ３０６１を示す。また、表１中、各成分の欄の数値は、各成分の配合重量部数（重量部）を示す。

In Table 1, E.M. E. coli refers to Escherichia coli IFO-3044; aureus refers to Staphylococcus aureus IFO 3061. Moreover, the numerical value of the column of each component in Table 1 shows the compounding weight part (part by weight) of each component.

  The antibacterial disinfectant of the present invention can be used, for example, as an agent that imparts antibacterial disinfectant properties to plastic molding materials and ceramic molding materials, and preferably to plastic molding materials and ceramic molding materials for use around water.

Claims (3)

  An antibacterial disinfectant characterized by containing a poorly water-soluble zinc-containing inorganic compound as an active ingredient.   2. The antibacterial fungicide according to claim 1, wherein the zinc-containing inorganic compound has a solubility at 25 ° C. in a pH of 6 to 8 of 1 g or less with respect to 100 g of water.   The zinc-containing inorganic compound is at least one zinc-containing inorganic compound selected from the group consisting of zinc hydroxide, zinc oxide, zinc borate, zinc carbonate hydroxide, and zinc phosphate, Item 3. The antibacterial disinfectant according to item 1 or 2.