JP5785666B1 - Antibacterial floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply an antibacterial paint for flooring in which a precious metal antibacterial component is present at a high concentration on a surface portion of a coated film after application of a resin having hydroxyl group reactivity, and the surface portion is coated with a noble metal antibacterial component. Provide an antibacterial floor surface present at a high concentration. The present invention is an aqueous emulsion comprising a resin raw material, a noble metal salt, a fulvic acid, and a resin curing means, wherein the noble metal salt is selected from the group consisting of a copper salt, a silver salt, and a platinum salt. It is one or more of these. [Selection figure] None

Description

  The present invention relates to an antibacterial floor surface, and more particularly to an antibacterial floor surface in which a noble metal antibacterial component is distributed at a high concentration on a surface portion.

Conventionally, antibacterial floors have been sought in many places such as hospitals, restaurants, schools, kindergartens, nurseries, public facilities, and households that keep pets.
In addition, due to recent changes in lifestyle and advances in building materials, flooring has been incorporated into the floors of ordinary houses. However, Japanese people have a strong lifestyle in tatami mats, and they can sit directly on the floor, lie down, or infants can hit the floor. There has been an increasing demand for the development of flooring floors with antibacterial properties.

As an antibacterial flooring material, for example, Patent Document 1 discloses an interior material including a floor to which a synthetic antibacterial substance is added, but the effect and sustainability of the antibacterial agent are not sufficient.
Patent Document 2 discloses a paint in which a photocatalyst powder is added to a polymer resin, and Patent Document 3 discloses a noble metal ion such as copper, silver or platinum or a noble metal nanocolloid obtained by reducing a noble metal ion as a zeolite. A coating material to which powder adsorbed on is added is disclosed.
However, in the paints described in Patent Document 2 and Patent Document 3, although the antibacterial component exhibits excellent antibacterial activity, the antibacterial agent sinks inside the coating because the specific gravity of the antibacterial agent powder is heavier than the paint. The concentration of the antibacterial agent on the surface is lowered, and the floor surface has a problem that it cannot exhibit sufficient antibacterial activity.

In Patent Document 4, an antibacterial resin film coating material containing silver carbonate fine particles having a particle size of 5 μm or less and having a silver content of 14 to 88% by mass is applied to a thickness of, for example, 3 μm. An example of use inside is described. In such a thin film, the antibacterial powder does not sink to the bottom of the coating film, but the coating film may be easily worn away by friction. Since the paint described in Patent Document 4 contains a lot of expensive noble metals, it is economically difficult to apply a thick coating to form a flooring.
Furthermore, a thin film containing a high concentration of silver carbonate may deteriorate physical properties, and silver carbonate changes from yellow to dark brown by light, which may deteriorate the appearance of the floor surface.

  Patent Document 5 contains metal nanoparticles in an emulsion formed in water by a polymer compound having three types of segments, a linear polyalkyleneimine chain, a hydrophilic segment, and an epoxy resin residue. Disclosed are metal nanoparticle dispersions. However, this metal nanoparticle dispersion has a complicated component structure using a tetrafunctional epoxy resin residue having a complicated structure, and there is a problem in using it as a general-purpose paint for floors. Patent Document 5 does not describe the presence of a high concentration of noble metal on the surface portion.

  As a flooring material for home use, in addition to the beauty and robustness of the coating film, it does not release formaldehyde and organic solvents, does not contain harmful substances, and can be licked by children, or the floor surface has an appropriate friction There is a need for a wide range of safety such as having no slippage.

Japanese Patent Laid-Open No. 3-241132 JP 2000-95976 A JP 7-164409 A Japanese Patent No. 5189320 Japanese Patent No. 4026664 JP 2011-74047 A JP 2008-7451 A

“Fractionation of fulvic acid by gel filtration and its chelating ability”, Hidekazu Yamada, Koyo Yonebayashi, Symbiotic Hattori, Shuji Morita, Proceedings of the Japan Society of Soil Fertilizer Science, Osaka, 1987: http: // ci. nii. ac. jp / els / 110001195691. pdf? id = ART0001528728 & type = pdf & lang = en & host = cinii & order_no = & ppv_type = 0 & lang_sw = & no = 1423817856 & cp = (searched on January 5, 2015).

  The present invention has been made in order to solve the above-described problems, and includes an antibacterial paint for flooring capable of causing a noble metal antibacterial component to be present in a high concentration on a surface portion of a coated film after coating, and the paint. It is an object of the present invention to provide an antibacterial floor characterized by applying a precious metal antibacterial component in a high concentration on the surface portion.

  In addition, the present invention has a beautiful surface, is resistant to spots and scratches, is robust, does not wear even when people walk on shoes, does not release formaldehyde or organic solvents, and does not contain harmful substances. An object of the present invention is to provide an antibacterial floor which is safe even when licked and has a moderate surface resistance and is hard to slip.

An antibacterial floor surface of the present invention for solving such a problem is an antibacterial paint for flooring which is an aqueous emulsion containing a resin raw material having reactivity with a hydroxyl group, a noble metal salt, fulvic acid, and a resin curing means. Is applied, dried, polymerized and cured, and the precious metal salt is 10 ⁻⁷ per 1 kg of the flooring weight formed by applying, drying, polymerizing and curing the antibacterial paint for flooring. To 10 ⁻⁴ [mol / kg flooring], and the ratio of the molar equivalent of the noble metal salt in the flooring to the carboxyl group equivalent of fulvic acid is in the range of 1:10 to 1: 100. It is characterized by that.

  In the present invention, the noble metal salt is preferably one or more of the group consisting of a copper salt, a silver salt, and a platinum salt, and among the noble metal salts, a silver salt is more preferred.

The present invention includes a precious metal salt of 10 ^{−7 to} 10 ⁻⁴ [mol / kg flooring material] with respect to 1 kg of the flooring weight formed by applying, drying, polymerizing and curing an antibacterial paint for flooring, The ratio of the molar equivalent of the noble metal salt in the flooring to the carboxyl group equivalent of fulvic acid is preferably in the range of 1:10 to 1: 100.

Further, the present invention is the resin raw material, is one or more of epoxy resins, silicone resins, one or more raw monomers of the group consisting of polyurethane resins, and polyester resins, prepolymers, and mixtures prepolymer More preferably, the resin material is an epoxy resin or a silicone resin.
The antibacterial coating material for flooring further includes a dispersant, and the dispersant is more preferably polyvinylpyrrolidone.
Furthermore, the resin material further preferably contains a hydrophilic segment resin, and the hydrophilic segment resin is more preferably a polyoxyalkylene resin.

  The antibacterial floor surface of the present invention is obtained by applying a flooring antibacterial paint containing a resin raw material having reactivity to a hydroxyl group, a noble metal salt, fulvic acid, and a resin curing means to the floor surface. Fulvic acid and noble metal antibacterial components are present in higher concentrations on the surface of the coating film than other parts, and have strong antibacterial, antifungal and antiviral effects due to the action of fulvic acid and noble metal antibacterial agents. An antibacterial floor can be produced.

The antibacterial floor surface of the present invention can reduce the amount of expensive noble metal salt used because the noble metal antibacterial component is present in the surface portion of the coated film at a higher concentration than other portions.
The antibacterial floor surface of the present invention is not coated with a thin film of an antibacterial agent on the surface, and the surface portion of the flooring material itself has antibacterial properties, so it wears even when a person walks on the floor surface with shoes. There are few features, and the effect is long lasting.

  In addition, the present invention uses an epoxy resin, a silicone resin, a polyurethane resin, or a polyester resin as a main ingredient, so that it is beautiful and excellent in robustness, does not emit harmful gases such as formaldehyde and organic solvents, and is licked by children. It provides an antibacterial floor with excellent safety that it is harmless. More preferably, by using an epoxy resin or a silicone resin as a main ingredient, it is possible to provide a safe antibacterial floor surface that has a slip resistance coefficient larger than that of other polymer resins and is less slippery.

Hereinafter, the antibacterial floor surface of the present invention will be described in detail.
The antibacterial floor surface of the present invention is preferably an aqueous emulsion obtained by mixing a resin raw material having reactivity with a hydroxyl group, a noble metal salt, fulvic acid, and a resin curing means.

  The present invention binds a fulvic acid having a chelating ability to a noble metal ion to the surface portion of the resin, binds the noble metal ion to the fulvic acid, and reduces the noble metal ion by the reducing power of the fulvic acid, thereby reducing the surface of the resin. A part of which noble metal nanocolloid is present in a higher concentration than the other part provides a functional floor surface having strong antibacterial, antifungal and antiviral activity due to the noble metal nanocolloid and fulvic acid.

  The noble metal salt used in the present invention preferably contains one or more members selected from the group consisting of a copper salt, a silver salt, and a platinum salt, and more preferred examples include silver salts. Silver obtained by reducing silver salt has a strong antibacterial and antifungal action and is a safe metal that has been used as a tableware material because it is less likely to become an allergen of precious metal allergy.

Moreover, the metal salt of this invention can contain the ionic compound containing copper, silver, and platinum, a complex salt, tetrachloroplatinate, and hexachloroplatinate.
Anions of noble metal salts with noble metals as cations should be exemplified as hydrochlorides, nitrates, perchlorates, sulfates, phosphates, tetrafluoroborates, and hexafluorophosphates as strong acid salts. Examples of the weak acid salt include acetate, formate, and carbonate, but the salt is not limited thereto. These salts are preferably water-soluble, but can also be used as fine powders, as long as they can be dissolved in water by forming complex salts by adding solubilizers such as aliphatic amines. Can also be preferably used.

  The antibacterial floor surface of the present invention is preferably based on an epoxy resin, a silicone resin, a polyurethane resin, or a polyester resin. The monomers and oligomers that are the raw materials of these resins are reactive to hydroxyl groups, and the resulting resin is high in hardness, colorless and transparent, and forms a glossy surface. It has excellent safety that it does not release gases such as organic solvents and is safe even if an infant licks it. More preferable examples include an epoxy resin and a silicone resin. Epoxy resins and silicone resins further have the characteristic that they have a large slip resistance coefficient, and the surface is hard to slip and is safe.

  The resin raw material used in the present invention is a thermosetting resin in which a monomer or a prepolymer is polymerized and networked to be polymerized. The present invention can also include a composite resin containing another polymer resin as a monomer, prepolymer, or resin curing means.

  The resin raw material having reactivity with a hydroxyl group of the present invention is not particularly limited as long as it is commercially available or can be synthesized and can be used in the present invention. In addition, other polymer resins may be added or copolymerized as long as they meet the object of the present invention.

The form of the resin raw material having reactivity with the hydroxyl group of the present invention is preferably an aqueous emulsion dispersed in a hydrophilic solvent such as water. By using an aqueous emulsion, the fulvic acid and the noble metal salt can be dispersed at a high concentration on the surface portion of the floor surface.
A monomer or prepolymer aqueous emulsion and a resin curing means are mixed, and if desired, a curing accelerator, a dispersant, a segment resin, etc. are added, and if necessary, polymerizing treatment such as heating is performed. By applying to the floor surface, an antibacterial floor surface can be produced. Since a known method can be used for polymerizing each resin material to polymerize, detailed description is omitted.

  The fulvic acid used in the present invention is one of humic substances obtained as an extract from humus soil, and according to the Dictionary of Chemistry (Kyoritsu Shuppansha, 1964) A substance that gives yellow or orange yellow color to the acidic supernatant when it is extracted with humic acid and precipitated with an inorganic acid. It is an amorphous substance that is soluble in water and ethanol, and has a single chemical structural formula. Rather than “the composition and molecular weight vary widely depending on the raw materials and sampling conditions”.

Although the manufacturing method of the fulvic acid used in this invention is not specifically limited, For example, the crude fulvic acid manufactured by the method described in the nonpatent literature 1 or refined fulvic acid can be used.
In the present invention, it is more preferable to use purified fulvic acid, and when using crude fulvic acid, it is desirable to use it after removing cations mixed with a cation exchange resin before use.

  Since the purified fulvic acid obtained by the method described in Non-Patent Document 1 is an aqueous solution, the content of fulvic acid is preferably estimated from the carboxyl group equivalent of fulvic acid. The carboxyl group equivalent is the number of mole equivalents of carboxyl groups present in a unit amount of fulvic acid, and can be represented by [number of moles / unit amount]. The carboxyl group equivalent can be determined by, for example, a neutralization titration method or a spectrophotometric method by comparison with a standard product.

The estimated structural formula of fulvic acid disclosed in Patent Document 6 is shown in the following (Chemical Formula 1).

  The structural formula of fulvic acid described in Patent Document 6 is a presumed structural formula. However, when studied with reference to other reports, fulvic acid is a condensed partial benzene having a strong structure as a common partial structure. It has a hydrophobic part having a carbon chain with a high degree of freedom of ring and conformational change, and a hydrophilic part having many carboxyl groups and hydroxyl groups. For this reason, when fulvic acid is added to the aqueous emulsion of the resin raw material, it is estimated that it is distributed at the interface between the oily resin raw material and water.

Non-patent document 1 shows that fulvic acid has a molecular weight mainly in the range of 700 to 5000, has a reducing power and a chelating ability for metal element ions, and Cu>Zn> Mn. It is reported that chelates are formed in order of strength and that they have reducibility. It is well known that fulvic acid has a chelating ability for metal elements including copper, silver and platinum.
In nature, fulvic acid plays a role in carrying metal element ions from mountains through rivers to the sea by chelating action.
Further, fulvic acid has antibacterial properties as described in Patent Document 7.

The antibacterial paint of the present invention can include a resin curing means as desired.
Here, the resin curing means is a substance that reacts and is taken into the resin, a substance that is not taken into the produced resin such as a reaction initiator or a reaction accelerator, and air-drying without using a special substance, Any of means for polymerizing and curing the resin raw material by means such as heating and ultraviolet irradiation can be included.
The resin curing means (substance) used in the present application is not particularly limited as long as it is commercially available or can be synthesized and used in the present invention.

In Patent Document 5, a process for producing a metal colloid solution by forming noble metal nanocolloid particles by adding 0.2 to 1.0 times polyvinyl pyrrolidone as a protective material to the metal mass of a metal salt. Is disclosed.
Patent Document 5 discloses that polyethyleneimine is used as an aliphatic polyamine of an epoxy resin curing agent and a polyoxyalkylene resin is added as a hydrophilic segment. The present invention can apply these findings as desired.

  That is, the antibacterial paint for flooring of the present invention can contain a dispersant for the purpose of stably dispersing the noble metal on the surface portion of the floor surface. The type of the dispersing agent used in the present invention is not particularly limited as long as it is commercially available or can be synthesized, and can disperse and stabilize the metal nanocolloid and can be used in the present invention. Although not preferred, polyvinylpyrrolidone can be mentioned as a preferred specific example.

  The antibacterial coating material for flooring of the present invention can further contain a hydrophilic segment resin for the purpose of causing the noble metal to exist at a high concentration on the floor surface. The hydrophilic segment resin used in the present invention is not particularly limited as long as it is commercially available or can be synthesized and can be used in the present invention. Examples include polyoxyalkylene resins.

The present invention preferably contains noble metal salts 10 ^{−7 to} 10 ⁻⁴ [mol / kg flooring material] with respect to 1 kg of the weight of the antibacterial floor formed by applying, drying and curing the antibacterial paint. . If the amount of the noble metal salt is less than 10 ⁻⁷ [mol / kg flooring], sufficient antibacterial properties cannot be obtained, and if it is more than 10 ⁻⁴ [mol / kg flooring], no further effect can be obtained. So it is not economically preferable.

  In the present invention, the molar ratio of the noble metal salt to the carboxyl group equivalent of the fulvic acid is preferably in the range of 1:10 to 1: 100. When the ratio of the molar equivalent of the noble metal salt to the carboxyl group equivalent of the fulvic acid is 1:10 or less, the effect of the fulvic acid for allowing the noble metal to be present at a high concentration in the surface portion of the floor surface cannot be sufficiently exhibited. Even if it is added so that the ratio of the carboxyl group equivalent of the fulvic acid to the molar equivalent of the noble metal salt is 1: 100 or more, no further effect is obtained, which is economically undesirable.

The method of using a fulvic acid to make a noble metal present at a high concentration on the surface of the resin is a method that is frequently used in the field of biochemistry using fulvic acid as a mediator.
That is, when an aqueous solution of fulvic acid is added to an aqueous emulsion of a resin raw material having reactivity with a hydroxyl group, fulvic acid adheres to the interface between the resin raw material particles and water, and a part of the hydroxyl group of fulvic acid is a resin. It reacts and bonds with the monomer or oligomer of the raw material.

When a fulvic acid, a noble metal salt, and a resin curing means are mixed with a resin raw material of an aqueous emulsion, the resin is crosslinked by the curing means. At this time, the fulvic acid to which the monomer or oligomer is bonded is bonded to the resin portion by using the monomer or oligomer of the resin raw material bonded to the hydroxyl group of fulvic acid as an anchor molecule.
Because fulvic acid has a large molecular weight, it binds to the surface part of the resin while retaining the steric conformation of the molecule and the ability to chelate metal ions even when bound to an anchor molecule (such as an enzyme). Can do.

In addition, the hydrophilic part of fulvic acid has affinity with the aqueous phase and fulvic acid is pulled by the surface part of the resin raw material particles, so that fulvic acid is fixed to the part near the surface of the resin, and the silver salt is chelate-bonded to fulvic acid. Then, it is dispersed on the surface portion of the resin, and the noble metal salt is gradually reduced to become a noble metal nanocolloid. In this case, if an aliphatic amine having two or more amino groups in the molecule is used as the curing agent, the noble metal salt and the resin curing agent may form an ammine complex, and the intramolecular redox reaction may proceed smoothly. .
In addition, after a small amount of resin raw material and fulvic acid are formed separately, the remaining resin raw material and resin curing means can be added to make a total amount, and a reducing agent can be added to reduce the noble metal salt. Thus, pre-metal nanocolloidization can be promoted.

(Production Example 1) Production of purified aqueous fulvic acid solution To 20 L of a mixed solution of 0.1 M sodium hydroxide aqueous solution and 0.1 M aqueous solution of sodium dihydrogen phosphate, 1.0 kg of corrosive earth was added and the mixture was stirred at 50 ° C. for 24 hours. After gently stirring, it was filtered. The filtrate was adjusted to pH 1 by adding 3 M sulfuric acid, and allowed to stand at room temperature for 24 hours, and then centrifuged to remove the humic acid fraction to obtain crude fulvic acid.
The crude fulvic acid is passed through a column packed with 1.0 kg of activated carbon to adsorb the fulvic acid, and the activated carbon column is washed with water and then extracted with a 0.1 M aqueous sodium hydroxide solution at a rate of 5 to 10 mL / min. The brown extract was passed through a column of Amberlite IRA400 (H-type) to obtain 0.75 L of a yellow to orange yellow purified fulvic acid aqueous solution. The resulting purified fulvic acid aqueous solution had a carboxyl group equivalent of 35.6 millicarboxyl group equivalent / L by neutralization titration.

(Example 1) Production of epoxy resin raw material to which silver ions and fulvic acid were added 56.2 mL (2.0 millicarboxyl group equivalent) of purified fulvic acid aqueous solution obtained in Production Example 1 to 0.1 kg of epoxy resin prepolymer, 1 mL (0.1 mmol) of 0.1 M silver nitrate aqueous solution was added and stirred until uniform, and then allowed to stand at room temperature for 24 hours to produce an epoxy resin raw material to which silver ions and fulvic acid were added.

(Example 2) Production of antibacterial paint raw material for flooring To epoxy resin raw material to which silver ion and fulvic acid produced in Example 1 were added, 0.9 kg of epoxy resin prepolymer, a predetermined amount of epoxy resin curing agent, and water 1 L was added, and the mixture was stirred at high speed until uniform and emulsified to produce an antibacterial paint for flooring. As the amount of the epoxy resin curing agent, the value described in the product catalog (in this example, 40 parts by weight of the epoxy resin curing agent when the weight of the epoxy resin prepolymer is 100 parts by weight) was used.

(Example 3)
The antibacterial paint for flooring produced in Example 2 was uniformly applied by a spraying method so as to be a floor surface of 7 m ² and dried to produce an antibacterial floor surface. The thickness of the coated film after painting was 0.2 mm.

(Comparative Example 1)
The antibacterial paint for flooring of Comparative Example 1 was produced in the same manner as in Examples 2 and 3, except that the same volume of water was added instead of the fulvic acid aqueous solution.

(Comparative Example 2)
Using the antibacterial silicone paint for flooring of Comparative Example 1, the antibacterial paint for flooring of Comparative Example 2 was produced in the same manner as in Example 3.

(Silver mirror reaction)
56.2 mL (2 millicarboxyl group equivalent) of a 35.6 millicarboxyl group equivalent / L purified fulvic acid aqueous solution produced in Production Example 1 was lyophilized to obtain 377 mg of a tan powder (powdered fulvic acid was 5 .3 carboxyl group equivalent / kg-powder).
Dissolve this powder in 4 mL of water, add a torence reagent prepared by adding concentrated ammonia water to 4 mL of 0.1 M silver nitrate, and warm to 50 ° C., forming a silver mirror after 10 minutes. It has been shown to have a reducing power to reduce the metal to silver metal.

(Silver nano colloid production test)
After adding 1 mL of 0.1 M silver nitrate aqueous solution to 56.2 mL (2.0 millicarboxyl equivalent) of the purified fulvic acid aqueous solution of 35.6 millicarboxyl group equivalent / L produced in Production Example 1, and stirring until uniform. 25 g of polyethyleneimine and 10 g of polyvinyl pyrrolidone were added and stirred until uniform. When the plasmon absorption spectrum of this solution was measured, a peak of the plasmon absorption spectrum was observed at 400 nm, confirming the formation of silver nanocolloid particles.

(Distribution of silver nanocolloid)
The antibacterial floor surface (thickness 0.2 mm) produced in Example 3 was ground in parallel with the surface, and was collected with care so as not to mix abrasive debris. -Divided into fifth fractions.
10 mg of each fraction was suspended in 4 mL of liquid medium, and the antibacterial activity of each fraction was compared by a liquid medium dilution method by doubling dilution.
(Test results)
Medium used: Standard liquid medium, Eiken Chemical Co., Ltd. Test bacteria: Bacillus subtilis natto (collected from natto)

実施例３で製造した抗菌性床面の研磨カスは、表面に近い第１分画及び第２分画の研磨カスが強い抗菌力を示し、銀コロイドが表面部分に高濃度に存在していることが示された。

The antibacterial floor polishing residue produced in Example 3 shows strong antibacterial activity in the first and second fraction polishing residues close to the surface, and the silver colloid is present at a high concentration in the surface portion. It was shown that.

(Antimicrobial test)
Testing organization: Japan Food Analysis Center Foundation Antibacterial activity test of antibacterial floor produced in Example 3 and Comparative Example 2 was conducted according to JIS Z 2801: 2000 “Antimicrobial Processed Products-Antibacterial Testing Method / Antimicrobial Effect” 5.2. The test was conducted according to a test method for plastic products. The results are shown in Table 2.
As shown in Table 2, the antibacterial floor surface of the present invention was shown to exhibit strong antibacterial properties against Vibrio parahaemolyticus and methicillin-resistant staphylococci.

(Mold resistance test)
Testing institute: Japan Food Analysis Center Foundation Antifungal flooring produced in Example 3 and Comparative Example 2 was tested for one week according to JIS Z 2911: 2010 “Fung resistance test method” paint test A test was conducted.
According to the test results, it was shown that the antibacterial floor surface of the present invention has strong antifungal properties against ringworm.
(Test results)
Test bacteria: Trichophyton rubrum TIMM 2659 (Rhabdoniae)
Test Results Example 3: Mycelium growth is not observed on the test piece.
Test Example 2: The area of the mycelial growth part does not exceed 1/3 of the total area.
Untreated: The area of the mycelium growth part exceeds 1/3 of the total area.

(Antiviral test)
Testing organization: Japan Food Research Center Foundation Test virus:
Feline calicivirus F-9 ATCC VR-782
(Feline calicivirus)
Outline of the test: The suspension of feline calicivirus was allowed to act on the antibacterial silicone resin floor surface produced in Example 3 and Comparative Example 2 10 times, and acted after 0.5, 1, 3, and 24 hours. The virus infectivity was measured after diluting the solution 1000 times.
Cells used: CRFK cells (Dainippon Pharmaceutical Co., Ltd.)
Measurement of virus infectivity titer: A cell maintenance medium and a working fluid were added to a test cell which had been cultured in a monolayer in a microplate using a cell growth medium and the culture medium was removed, and cultured for 4 to 7 days in a carbon dioxide incubator. The change in cell morphology was observed, and the 50% tissue culture infectious dose (TCID ₅₀ ) was calculated and converted to the virus infection titer per mL of working fluid.
(Test results): The results are shown in Table 3.

表３に示すように、本発明の抗菌性床面は、ノロウィルスの代替ウィルスであるネコカリシウィルスに対して、強い増殖阻止作用を示した。

As shown in Table 3, the antibacterial floor surface of the present invention exhibited a strong growth inhibitory action against feline calicivirus, which is a substitute virus for Norovirus.

(Slip test)
Testing organization: Building Materials Testing Center
The slip test of the antibacterial floor produced in Example 3 was conducted according to JIS A 1454 (high
(Molecular-based tension flooring test method) 6.14 Sliding test
(Test results)
Slip resistance coefficient of Example 3 1.25
Slip resistance coefficient of Comparative Example 2 1.25
Sliding resistance coefficient of polyurethane resin 0.98

  As mentioned above, although preferred embodiment regarding this invention was described, this invention is not limited to the said embodiment, All the changes in the range which does not deviate from the technical scope to which this invention belongs are included.

Claims (9)

Forming an antibacterial paint for flooring, which is an aqueous emulsion containing a resin raw material having reactivity with a hydroxyl group, a noble metal salt, fulvic acid, and a resin curing means, by applying, drying, and polymerizing / curing ,
Applying the flooring antibacterial coating, drying, relative to the weight 1kg of flooring which is formed by polymerizing and curing, the noble metal salt comprises ^{10 -7} to ^{10 -4} [mol / kg flooring, the floor The antibacterial floor surface , wherein a ratio between a molar equivalent of the noble metal salt in the material and a carboxyl group equivalent of fulvic acid is within a range of 1:10 to 1: 100 .   The antibacterial floor surface according to claim 1, wherein the noble metal salt is one or more of a group consisting of a copper salt, a silver salt, and a platinum salt.   The antibacterial floor surface according to claim 2, wherein the noble metal salt is a silver salt. Resin material reactive with the hydroxyl groups, epoxy resins, silicone resins, polyurethane resins, and one or more ingredients of the group consisting of polyester resin, a monomer, a prepolymer, and of mixing the prepolymer with one or more The antibacterial floor surface according to claim 1, wherein the antibacterial floor surface is provided.   The antibacterial floor surface according to claim 4, wherein the resin raw material having reactivity with the hydroxyl group is an epoxy resin or a silicone resin.   The antibacterial floor surface according to any one of claims 1 to 5, wherein the aqueous emulsion further contains a dispersant.   The antibacterial floor surface according to claim 6, wherein the dispersant is polyvinylpyrrolidone.   The antibacterial floor surface according to claim 1, wherein the resin raw material having reactivity with the hydroxyl group further contains a hydrophilic segment resin. The antibacterial floor surface according to claim 8, wherein the hydrophilic segment resin is a polyoxyalkylene resin.