JPH02306902A - Antimicrobial agent composition - Google Patents

Abstract

PURPOSE:To provide an antimicrobial agent composition comprising an antimicrobial agent, a mixture of an aromatic and non-aromatic non-ionic surfactants, a binder and water, finely dispersed in a fine particle state, strongly fixed to an adhered, prepared inexpensively and using no organic solvent. CONSTITUTION:An antimicrobial agent composition comprises 1-80wt.% of an antimicrobial agent (e.g. 2-benzimidazolyl carbamic acid methyl ester), 0.1-8wt.% of a nonionic surfactant, 12-99wt.% of a binder (e.g. polyvinyl acetate) and water. The nonionic surfactant is a 1:4-4:1 mixture of an aromatic (e.g. polyoxyethylene nonylphenyl ether) and a no-aromatic (e.g. polyoxyethylene lauryl ether), thereby allowing to finely disperse the antimicrobial agent in a fine particle state having an average particle size of 2-1mum. The composition is a water dispersion, is readily employed and exhibits excellent antibacterial, deodorizing and antifungal activities, etc.

Description

[Detailed description of the invention] C) Industrial application field) The present invention relates to an aqueous dispersion antibacterial composition.

[Conventional technology]

Antibacterial agents are substances that mainly suppress or kill the growth of bacteria, mold, etc., and are used, for example, as antibacterial and deodorizing agents for fiber yarns and textile products spun from them, or as antibacterial agents for paper products, nonwoven fabrics, etc. Antibacterial agents, antibacterial or antibacterial paints, textile covers, toiletry products such as toilet seats,
Antibacterial agents suitable for each purpose are selected and used as antifungal agents, antibacterial agents for plastic products such as tiles, floorboards, and wallpaper.

Since this antibacterial agent is insoluble in water, it has conventionally been used in the form of a solution, either by adding it to the object in solid form and kneading it into the object, or by dissolving it in an organic solvent.

[Problem to be solved by the invention]

However, organic solvents have problems in terms of toxicity and flammability, and when using an antibacterial agent dissolved in an organic solvent, safety and disaster prevention measures are required. It was missing.

In addition, antibacterial agents have a particle size of about 10 to 1,000 μm, and when used by kneading them into objects, it is difficult to make them into fine particles, which takes a lot of time and money. Moreover, there was a limit to the extent to which it could be made into fine particles. Moreover, when using an antibacterial agent mixed into the object, the antibacterial agent is dispersed throughout the object, so there are problems such as the need to add it at a high concentration in order to maintain its useful effect. It had

(Means for Solving the Problems) As a result of extensive research in order to solve the various problems that arise when using antibacterial agents as described above, the present inventors have found that at least one type of aromatic nonionic surfactant When the antibacterial agent is dispersed in water using a combination of the antibacterial agent and at least one non-aromatic nonionic surfactant, the antibacterial agent has an average particle size of 0.
When a binder that can be finely dispersed in the form of fine particles of 2 to 1/7 m and that firmly fixes the antibacterial agent to the adherend is added to the aqueous dispersion of the antibacterial agent at a specific ratio of υ1. ,
The fine particle dispersion state is not impaired, and the various problems caused by the use of umia agents are solved, and the problems when kneading them in solid form are also solved, making them safe and easy to use.
Furthermore, it was discovered that an antibacterial agent composition in an aqueous dispersion system, in which the antibacterial agent is firmly immobilized on the adherend, can be used efficiently, and can be manufactured at low cost, has been completed, and the present invention has been completed.

That is, the present invention provides an antibacterial agent, a nonionic surfactant consisting of a mixture of at least one aromatic nonionic surfactant and at least one nonaromatic nonionic surfactant, and a binder. and water, and the composition ratio of the antibacterial agent, nonionic surfactant, and binder is 1 to 80% of the antibacterial agent.
(wt%, same below), nonionic surfactant O81-8
%, binder 12-99%, and the antibacterial agent has an average particle size of 0.
．． The present invention relates to a water-dispersed antibacterial agent composition characterized in that it is finely dispersed in the form of fine particles of 2 to 1 μm.

In the present invention, antibacterial agents include, for example, methyl 2-benzimidazolylcarbamate, 2,4°5.6-titrachloroisophthalonitrile, N-(fluorodichloromethylthio)-phthalimide, α-bromocinnamaldehyde, zincuomazine, N,N-dimethyl-N'-
Phenylsulfamide, bis(dimethylthiocarbamoyl)disulfide, 5-chloro-2-methyl-4-inchazolin-3-one, 2-methyl-4-isothiaprin-3-one, thiabendazole, chlorohexidine hydrochloride, trichloro carpan, 3-trifluoromethyl-4,
4'-dichlororuvanilide, clotrimazole, tolnaftate, etc. may be used alone or in combination of two or more.

In the present invention, the nonionic surfactants include at least one aromatic nonionic surfactant and at least one aromatic nonionic surfactant.
A mixture of species with a non-aromatic non-ionic surfactant is used.

The reason why nonionic surfactants are used is that nonionic surfactants do not have reactivity with antibacterial agents. The purpose of using a mixture of an aromatic nonionic surfactant and a nonaromatic nonionic surfactant is to finely disperse the antibacterial agent into fine particles with an average particle size of 0.2 to 1 μm. be. In other words, unless a nonionic surfactant is used in such a combination, the antibacterial agent should be used with an average particle size of 0.2 to 1 μm.
The antibacterial agent cannot be finely dispersed in the form of fine particles, and the antibacterial agent aggregates, making it impossible to obtain a finely dispersed aqueous dispersion.

As mentioned above, by using a mixture of an aromatic nonionic surfactant and a nonaromatic nonionic surfactant,
The reason why antibacterial agents can be finely dispersed into fine particles with an average particle size of 0.2 to 1 μm is not entirely clear at present, but it is because aromatic nonionic surfactants are compatible with antibacterial agents. It can be thought of as follows. However, if aromatic nonionic surfactants are used alone, good results cannot be obtained, and a finely dispersed aqueous dispersion cannot be obtained, probably because the compatibility with antibacterial agents is too strong.

In the present invention, as the aromatic nonionic surfactant, for example, polyoxyethylene alkylphenyl ether, polyoxyethylene diphenyl ether, polyoxoethylene naphthyl ether, etc. are used.

Specific examples of these aromatic nonionic surfactants include:
For example, polyoxyethylene nonylphenyl ether,
Examples include polyoxyethylene octylphenyl ether, polyoxyethylene diphenyl ether, and polyoniton ethylene naphthyl ether.

On the other hand, examples of non-aromatic nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyhydric alcohol fatty acid ester, polyoxyethylene polyhydric alcohol JI + I fatty acid M ester, and C'i #M fatty acid. Ester, polyoxyethylene fatty acid amide, poly-1-diethylene alkylamine, polyoxyethylene glycerin fatty acid ester, etc. are used.

Specific examples of these non-aromatic nonionic surfactants include:
For example, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene tridecyl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene laurate, polyoxyethylene oleate, polyoxyethylene stearate, Oxyethylene laurylamine, sorbitan laurate, sorbitan laurate, sorbitan stearate, sorbitan oleate, polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan palmitate, polyquine ethylene sorbitan stearate, polyoxyethylene sorbitan oleate 1. Examples include ethylene oxide/propylene oxide block polymer, polyoxyethylene polyoxypropylene lauryl ether, and polyoxyethylene polyoxybrobylene oleyl ether.

The ratio of these aromatic nonionic surfactants to nonaromatic nonionic surfactants is 1:
Preferably, the ratio is 4 to 4:1.

In the present invention, the binder is used to firmly fix the antibacterial agent to the adherend, and examples of the binder include phenol resin, olefin resin, isone anate resin, epoxy resin, Among vinyl acetate resins, acrylic copolymer resins, cyanoacrylic resins, urethane resins, nitrile combs, SBR resins, and ethylene resins, water emulsion types may be used alone or in combination of two or more. It is used as

Specific examples of these binders include polyvinyl acetate, polyvinyl butyral, polyacrylic ester,
Acrylic and vinyl copolymers, polyethylene, ethylene-vinyl acetate copolymers, polyvinyl chloride-vinyl acetate copolymers, nylon, polyethylene terephthalate,
polybutylene terephthalate, urea-formaldehyde condensate, resorcinol-formaldehyde condensate,
Examples include epoxy resin, polyurethane, vinyl urethane, polyisoprene, polychloroprene, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, styrene-butadiene-vinylpyridine terpolymer, polyisobutylene, butyl rubber, polyimide, etc. .

In the present invention, the composition ratio of these antibacterial agents, nonionic surfactants, and binders is 1 to 80% for the antibacterial agent, 0.1 to 8% for the nonionic surfactant, and 12 to 99% for the binder. It is. However, the amount of each component is as solid content.

In other words, if the composition ratio of the antibacterial agent is less than the above range, the effect of the antibacterial agent will not be fully exerted, and if the composition ratio of the antibacterial agent exceeds the above range, it will be difficult to finely disperse the antibacterial agent into fine particles. Furthermore, due to the decrease in the amount of binder, it becomes impossible to firmly fix the antibacterial agent to the adherend.

If the composition ratio of the nonionic surfactant is less than the above range, the antibacterial agent cannot be finely dispersed into fine particles, and if the composition ratio of the nonionic surfactant is higher than the above range, the nonionic interface Due to the bonding between active agents, 4f aggregation properties appear, making it impossible to finely disperse the antibacterial agent into fine particles.

When the composition ratio of the binder is less than the above range, the antibacterial agent cannot be firmly immobilized on the adherend, and when the composition ratio of the binder exceeds the above range,
Viscosity appears, making it impossible to obtain a good aqueous dispersion, and when processed into textile products, the texture after processing becomes poor.

A particularly preferable composition ratio of these antibacterial agents, nonionic surfactants, and binders is 5 to 60% of the antibacterial agent, 0.5 to 6% of the nonionic surfactant, and 34 to 94.5% of the binder. %.

In the present invention, water is an essential component, but this water is very effective if the composition ratio of the non-aqueous component consisting of the antibacterial agent, nonionic surfactant, and binder is kept within the above range. A finely dispersed water dispersion state can be maintained over a wide range of usage amounts. For example, water is io
A finely dispersed water dispersion state can be maintained in a wide range of usage amount, from 1,000,000 parts by weight. Since water can be used in a very wide range of amounts in this way, in the present invention, when trying to specify the composition ratio of the four essential components of antibacterial agent, nonionic surfactant, binder, and water, ,
Since the composition ratios of other non-aqueous components are greatly affected by changes in the amount of water, the composition ratios are determined based on the three components: antibacterial agent, nonionic surfactant, and binder.

The above-mentioned antibacterial agent composition usually contains 5 to 5 % of a non-aqueous component consisting of the above-mentioned antibacterial agent, a nonionic surfactant, and a binder at the time of preparation.
It is prepared as an approximately 0% aqueous dispersion, and when used, it is diluted with water to a suitable concentration depending on the intended use.

Furthermore, the antibacterial agent composition of the present invention may also contain a small amount of an antifoaming agent, etc., in addition to the four components of the above-mentioned antibacterial agent, nonionic surfactant, binder, and water.

The antibacterial agent composition of the present invention can be used, for example, as an antibacterial and deodorizing agent for fiber yarn or textile products spun from it, or as an antibacterial or antifungal agent for paper products, nonwoven fabrics, or an antibacterial or antifungal paint.
It is applied as an antibacterial and antifungal agent for toiletry products such as textile covers and toilet seats, as well as an antibacterial and antifungal agent for plastic products such as tiles, floorboards, and wallpaper.

When applied to the above-mentioned products, the antibacterial composition of the present invention can be applied, for example, by coating or spray painting on the surface of the adherend, or by coating the adherend with the antibacterial composition (or
A method such as immersion in a water-diluted solution is adopted.

However, when applied to paint, it is mixed into the paint.

〔Example〕

Next, the present invention will be explained in more detail using a solid line example.

In addition, prior to explaining the examples, according to Experimental Example 1, the average particle diameter of the antibacterial agent is ! ■ Clarifying the impact on samurai,
In addition, Experimental Example 2 clarified the difference in the supported amount depending on the presence or absence of a binder, and Experimental Example 3 clarified the difference in the average particle diameter of the antibacterial agent and the difference in the supported amount of the antibacterial agent due to the difference in nonionic surfactants. .

Experimental Example 1 Antibacterial agents, nonionic surfactants, and water in the following formulations were dispersed using various dispersion devices to obtain dispersions in which the antibacterial agents had different average particle sizes.

Antibacterial layer Chlorhexidine hydrochloride 15% Triclocarpane 20% Nonionic surfactant Polyoxyethylene nonylphenyl ether (HLB8.9) 2% Polyoxyethylene nonylphenyl ether (HLBll, 6) 1%
Polyoxyethylene lauryl ether (HL B14.0) 1% polyoxyethylene stearate (HLB7.7) 1% ethylene oxide/propylene oxide carbon polymer-1% (average molecular l 1,250, ethylene oxide Ji2
0%) water
59% An aqueous dispersion of the above antibacterial agent, nonionic surfactant, and water stirred with a normal stirrer is ground milled.
The antibacterial agent was finely dispersed using an ultrasonic stirrer and a continuous closed horizontal mill. Table 1 shows the relationship between the dispersion device used, the dispersion time, and the average particle size of the antibacterial agent. The average particle-r diameter of the antibacterial agent was measured using Shimadzu Corporation's P
A R"l" [Created by CLE A NALYZER.

Table 1 As shown in Table 1, according to the continuous closed horizontal mill,
An aqueous dispersion in which the antibacterial agent is finely dispersed in the form of fine particles can be obtained in a short dispersion time.

Next, the three types of dispersions containing the above antibacterial agents were mixed with water for 90 minutes.
Dilute it 0 times, soak a cotton cloth in this diluted solution for 30 minutes,
After immersion, it was centrifuged for 2 minutes, dried at 100"C for 30 minutes, and then allowed to cool in a desiccator to process the 4 antibacterial agents into cotton cloth.

The amount of antibacterial agent supported on the cotton cloth treated with antibacterial agent as described above was measured by absorbance method. Average particle size of antibacterial agent and (
■Table 2 shows the relationship between the amount held and the IVi device used.

Table 2 As shown in Table 2, when the average particle size of the antibacterial agent is small,
The antibacterial agent-carrying capacity of the cotton fabric becomes significantly larger.

Experimental Example 2 Two types of dispersions containing the antibacterial agent prepared in Experimental Example 1 (
That is, a dispersion liquid in which an antibacterial agent is dispersed with an average particle size of 1.8 μm and a dispersion liquid in which an antibacterial agent is dispersed in an average particle size of 0.48 μm) are blended with a binder (polyethyl acrylate) in the following formulation, Four types of antibacterial compositions were prepared, including one containing no binder.

Binder: Yes Dispersion of Experimental Example 1 50% polyethyl acrylate 25% water
25% binder:
None Dispersion of Experimental Example 1 50% water
50% The above four types of antibacterial compositions were diluted 15 times with water, and a cotton cloth was γR soaked in the diluted solution of the antibacterial composition at room temperature in the same manner as in Experimental Example 1. The cotton fabric was processed.

The processed cotton fabric was washed according to JIS L 0217103 method, and changes in the amount of antibacterial agent supported as the number of washings increased was investigated. The results are shown in Table 3. In Table 3, the antibacterial agent compositions are shown by the average particle diameter of the antibacterial agent and the presence or absence of a binder.

Table 3 As shown in Table 3, the antibacterial agent has an average particle size of 0.48 μm.
In the case of an antibacterial agent composition finely dispersed in the form of fine particles and containing a binder, the antibacterial agent could be supported at a high concentration even after washing 30 times.

Experimental Example 3 Three types of antibacterial agent compositions, Samples A, B, and C, were prepared by dispersing the antibacterial agent, nonionic surfactant, binder, and water shown in Table 4 in a continuous closed horizontal mill for 60 minutes. was prepared. Note that the numerical values indicating the blending amount of each component in Table 4 are based on %. As can be seen from this Table 4, the above sample A
, B and C are different only in the nonionic surfactant used, and the other ingredients, namely antibacterial agent, binder, and water, are all the same.

Table 5 shows the results of measuring the average particle diameter of the antibacterial agents in the antibacterial agent compositions of Samples A, B, and C obtained.

Also, try the above! 4A, B, C antibacterial composition with water
The solution was diluted to 0 times, and a cotton cloth was immersed in this diluted solution at room temperature in the same manner as in Experimental Example 1, and thereafter treated in the same manner as in Experimental Example 1 to process the cotton cloth.

This processed cotton fabric was washed according to JIS L 0217103 method, and the antibacterial agent that was produced due to the increased number of washings was removed.
We investigated changes in the amount carried. The results are shown in Table 5.

The antibacterial agent composition of Sample A in Table 5 contains, as a nonionic surfactant,
Aromatic nonionic surfactant (polyoxyethylene nonylphenyl ether) and nonaromatic nonionic surfactant (polyoxyethylene lauryl ether, polyoxyethylene stearate 1, and ethylene oxide/propylene oxide 1' block) However, as shown in Table 5 above, in the antibacterial composition of Sample A, the antibacterial agent has an average particle diameter of 0.
．． The antibacterial agent was finely dispersed in the form of fine particles of 48 μm, and even after washing 30 times, it carried the antibacterial agent at a high concentration of 600 ppm.

On the other hand, the antibacterial agent composition of Test t4B using only an aromatic nonionic surfactant had an average particle size of 2.
At 5 am, it did not turn into fine particles like sample A, and after washing 30 times, the amount of antibacterial agent supported was zero. In addition, the antibacterial agent composition of Sample C using only a non-aromatic nonionic surfactant also had an average particle size of 2.8 μrn and did not become fine particles like Sample A, and was washed 30 times. Afterwards, the amount of antibacterial agent supported became zero.

Example 1 The antibacterial agent, nonionic surfactant, binder, and water of the following formulation were dispersed in a continuous closed horizontal mill for 60 minutes to finely disperse the antibacterial agent into fine particles with an average particle size of 0.48 μm. A water-dispersed antibacterial agent composition was obtained.

Antibacterial agents Chlorhexidine hydrochloride 10% triclocarpan 2% tolnaftate
1% nonionic surfactant polyoxyethylene nonylphenyl ether (HLB 8.9) 1% polyoxyethylene lauryl ether (HL B 14.0), 0.3% polyoxyethylene sorbitan monooleate (HL B 15.0) 0.
2% binder methyl methacrylate-hydroxyethylene methacrylate copolymer (copolymerization ratio 90:10) 16% ethylene-vinyl acetate copolymer ffLIl (copolymerization ratio 50:50) 16% water 53
．． 5% The composition ratio of the antibacterial agent, nonionic surfactant, and nonaqueous component of the binder in the above formulation is as follows.

Antibacterial agent 28.0% nonionic surfactant 3.2% binder
68.8% Also, these well water components 10
The ratio of water to 0 parts by weight is about 115 parts by weight, and the nonionic surfactants are aromatic (polyoxyethylene nonylphenyl ether) and non-aromatic (polyoxyethylene lauryl ether and polyoxyethylene lauryl ether). (ethylene sorbitan monooleate) is 2:1 by weight pressure.

The antibacterial composition of Example 1 above was diluted 30 times with water, and a cotton cloth was immersed in the diluted solution of the antibacterial composition at room temperature for 30 minutes. After soaking, it was centrifuged for 2 minutes and then heated at 100°C 30
After drying for a minute, the cloth was allowed to cool in a desiccator, and the antibacterial agent was applied to the cotton cloth. Changes in the amount of the applied cotton cloth and its antibacterial and deodorizing properties as the number of washings of the treated cotton cloth increased were investigated.

[Change in the amount of antibacterial agent supported as the number of washings increases] The treated cotton fabric was washed according to the JIS L 0217103 method, and changes in the amount of antibacterial agent supported as the number of washes increased were investigated. The results are shown in Table 6.

Table 6 As shown in Table 6, the cotton fabric treated with the antibacterial composition of Example 1 had a 5,000 ρpI11 even after washing 30 times.
It carried an antibacterial agent at a high concentration.

(Antibacterial and deodorizing properties) The above-treated cotton fabric was
icanAssociation of Text
ile ChemiSts and C01or
A bacterial count reduction rate test was conducted using Test Method 100 of IST) to examine its antibacterial and deodorizing properties.

The test bacterium is 5taphlococcus aureus
It is IFO13277.

After washing the processed cotton fabric 30 times, the difference in the increase/decrease value of the test bacteria compared to the unprocessed cotton fabric was 5,103, which is the standard value (L is considered to have the effect of suppressing the growth of the test bacteria).
It was well above the standard value of 1.6, and the effect of inhibiting bacterial growth was sufficiently recognized.

Next, the antibacterial composition of Example 1 was diluted 30 times with water, and an acrylic fiber cloth was immersed in the diluted solution of the antibacterial composition at room temperature for 30 minutes, and after soaking, it was centrifuged for 2 minutes. After drying at 100°C for 30 minutes, the antibacterial agent was processed into the acrylic fiber cloth by cooling in a desiccator, and the antibacterial agent increased as the number of washings of the processed acrylic fiber cloth (sample 11Nn1) increased. We investigated changes in the amount of supported and antibacterial and deodorizing properties.

In addition, the antibacterial agent composition of Example 1 was diluted 100 times with water, and an acrylic fiber cloth was immersed in the diluted solution of the antibacterial agent composition at room temperature in the same manner as above to initially support the antibacterial agent. A small amount of acrylic fiber cloth (sample floor 2) was prepared, and the changes in the amount of antibacterial agent supported as the number of washings increased and the antibacterial and deodorizing properties of this cloth were also investigated.

[Changes in the amount of antibacterial agent supported as the number of washings increases] The acrylic fiber cloths of Sample N11l and Sample No. 2 were tested according to JIS standards.
The clothes were washed using the L 0217 103 method, and changes in the amount of antibacterial agent supported as the number of washings increased were examined. The results are shown in the 7th section.
Shown in H. In addition, since this acrylic fiber cloth is intended for use in panty stonking, the number of washings was set to five in accordance with the number of washings required for this.

Table 7 As shown in Table 7, even with sample Nα2, which had a reduced amount of antibacterial agent carried, the amount of antibacterial agent was 1°500 pp after washing 5 times.
It showed a high antibacterial agent loading of m.

[Antibacterial and deodorizing properties]

The acrylic fiber cloths of Sample No. 1 and Sample Seed 2 were subjected to a bacterial count reduction rate test according to AATCC Test Method 100 to examine their antibacterial and deodorizing properties.

At the same time as in the case of the cotton cloth, the test surface was
lococcus aureus IFO13277.

The differences in the increase/decrease values of the sample surfaces of the acrylic fiber cloths of Sample Nαl and Sample Soil 2 compared to the unprocessed acrylic fiber cloths after washing five times are as shown in Table 8 below, and both are based on the standard. It exceeded the value of 1.6.

Table 8 Example 2 The following combination of antibacterial agent, nonionic surfactant, binder and water was dispersed in the same manner as in Example 1, and the antibacterial agent was finely dispersed into fine particles with an average particle size of 0.59 μm. A water-dispersed antibacterial agent composition was obtained. However, the antibacterial agent used had an average particle size of 30 μm in solid form.

Antibacterial bacterium 2-henzimidadulyl methyl carbamate 15% Nonionic surfactant polyoxyethylene nonylphenyl ether (HLB 8.9) 1%
Polyoxyethylene sorbitan monooleate (L B 15.0)
2% binder polyethyl acrylate 15% styrene-butadiene copolymer 8% (copolymerization ratio 25
: 75) water
59% The composition ratio of the antibacterial agent, nonionic surfactant, and binder in the nonaqueous component of the above antibacterial agent composition is as follows.

Antibacterial agent 36.6% nonionic surfactant 7.3% binder
In addition, the amount of water per 100 parts by weight of these non-aqueous components is about 144 parts by weight, and the nonionic surfactant aromatic J1) (polyoxyethylene nonylphenyl ether) and the non-aromatic (Polyoquine ethylene sorbitan monoole (・)
The ratio of vehicle volume is 1:2.

The above antibacterial agent composition was diluted 10 times with water, sprayed uniformly onto the surface of a polyvinyl chloride sheet (50cm x 50c+n), and dried to produce a surface-activated antibacterial vinyl chloride sheet.

After cutting a part of this sheet into pieces and extracting the antibacterial agent with methanol, the content of the antibacterial agent was measured by an absorbance method, and the content of the antibacterial agent was 0.05%.

Comparative Example 1 0.2% of methyl 2-henzimidazolylrubamate having an average particle size of 30 μm was added to the vinyl chloride resin and kneaded into the resin, and then formed into a sheet.

When a part of this sheet was cut into pieces and the antibacterial agent content was measured in the same manner as in Example 2, the antibacterial agent content was 0.19%.
Met.

The sheet of Example 2 and the sheet of Comparative Example I were subjected to the water resistance test and anti-mold test shown below, and the results are shown in Table 9.

[Water resistance test] 500 sheets each of the sheet of Example 2 and the sheet of Comparative Example 1 were tested.
Each sample was immersed in water for 300 hours under running water. Thereafter, it was dried to obtain a test piece.

One gram of this test piece was taken, cut into pieces, the antibacterial agent was extracted with methanol, and the content of the antibacterial agent was measured by absorbance method. The results are shown in Table 9 below in comparison with the antibacterial agent content before the water resistance test.

[Anti-mold test]

Each LK specimen before and after the water resistance test was cut into a circle with a diameter of 28n*, and JIS Z 291119B1.7.4
The paint specified in the above was applied to the surface of the plate culture medium. Spray 1 mff1 of spore suspension on this test piece and the surface of the medium, and heat at 27°C.
The resistance was determined after 130 days of culture. Note that the number of tests in the same test was three. The test results are shown in Table 9. In Table 9, the three tests are shown as (a), (b), and (c), respectively.

As shown in Table 9, in Example 2 of the present invention, the content of antibacterial agent decreased little in the water resistance test, and even after the water resistance test, the mold resistance in the antifungal test was excellent. . In addition, in Comparative Example 1, the antibacterial agent content decreased significantly in the water resistance test, and in the antifungal test after the water resistance test, the mold resistance was inferior to that in Example 2. .

In this way, the amount of antibacterial agent fff after the water resistance test of Comparative Example 1
The reason why the mold resistance was poor despite the fact that t was higher than in Example 2 is because in the case of Example 2, the antibacterial agent composition was applied to the surface of the adherend by spray painting. Since the antibacterial agent is concentrated on the surface of the body, excellent mold resistance can be achieved even if there is little overall staining, but in Comparative Example I, the antibacterial agent is kneaded into the adherend. Therefore, it is thought that the amount of antibacterial agent in the surface layer was small in terms of the overall antibacterial agent content, which led to poor mold resistance after the water resistance test.

〔Effect of the invention〕

As explained above, in the present invention, the antibacterial agent is aqueous dispersion system, is safe and easy to use, and is firmly fixed to the adherend.
It was possible to provide an antibacterial agent composition that exhibits excellent antibacterial and deodorizing properties and antifungal properties and can be used efficiently.

Claims (1)

[Claims] (1) Consisting of an antibacterial agent, a nonionic surfactant, a binder, and water, the nonionic surfactant being at least one aromatic nonionic surfactant and at least one nonaromatic nonionic surfactant. The binder is composed of a mixture of surfactants, and the binder fixes the antibacterial agent to the adherend, and the composition ratio of the antibacterial agent, nonionic surfactant, and binder is 1 to 80%. An aqueous dispersion characterized in that the antibacterial agent is finely dispersed in the form of fine particles with an average particle size of 0.2 to 1 μm. antibacterial agent composition.