JPH08277371A - Antimicrobial and antifungal coating composition - Google Patents

Abstract

PURPOSE: To obtain a coating composition having high safety and excellent antimicrobial and antifungal effect on filter, etc., of an air conditioner, etc., by adding a substituted phenolic compound and a carbamic acid-based compound to a matrix component which is a main element for forming a coating film. CONSTITUTION: This composition is obtained by blending preferably 100 pts.wt. of a matrix component with 0.1-3.0 pts.wt. of (A) a substituted phenolic compound (especially preferably 3-methyl-4-isopropylphenol or 2-isopropyl-5- methylphenol) and 0.1-3.0 pts.wt. of (B) a carbamic acid-based compound [especially preferably 3-iodo-2-propenyl-butylcarbamate or methyl-1-(butylcarbamoyl)-2- benzimidazole carbamate]. Further, 0.1-3.0 pts.wt. of (C) a pyrithione-based compound (especially preferably zinc 2-piridinethiol-1-oxide) is preferably combinedly used together with the components A and B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow fan, a filter, an outlet, etc. used as an internal part of an air conditioner, for example, a home and commercial air conditioner (hereinafter abbreviated as "air conditioner"). The present invention relates to an antibacterial and antifungal coating composition which prevents the growth of microorganisms such as mold that adheres to and contaminates the above parts.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of environmental hygiene, antibacterial and antifungal paints have been applied to various parts where microorganisms such as mold that are harmful to the human body adhere and propagate, for example, crossflow fans which are internal parts of air conditioners. It is applied to prevent the growth of general mold such as blue mold and black koji mold, which easily breeds in the home, and various antibacterial and antifungal paints are used. Conventionally, as an antibacterial agent to be added to such an antibacterial / mildewproof coating, for example, an antibacterial agent such as a halogen type, an organic arsenic type or a quaternary ammonium salt has been used.

[0003]

However, among the above antibacterial agents, halogen-based and organic arsenic-based antibacterial agents are highly toxic and have a risk of adversely affecting the human body, and may lead to environmental damage. Have. In addition, as other organic antibacterial agents, 2- (4-thiazolyl) -benzimidazole (TBZ), 2- (carbomethoxyamino) -benzimidazole (BCM) and the like are used. Although these organic antibacterial agents have a heat resistance temperature of 200 ° C. or higher and are relatively safe, they are effective against mildew-prone molds such as spider molds and alternaria from the viewpoint of antibacterial and antifungal properties. It is low and has the drawback that it cannot completely prevent the growth of microorganisms. As described above, the fact is that at present, there is no substance that has low toxicity, high safety, and that can effectively prevent the growth of microorganisms.

The present invention has been made in view of the above circumstances, and has low toxicity and high safety, and further, the adhesion and attachment of microorganisms.
It is an object of the present invention to provide an antibacterial and antifungal coating composition capable of effectively preventing breeding over a long period of time.

[0005]

In order to achieve the above object, the present invention provides an antibacterial agent containing the following components (A) and (B), which are excellent in the effect of spider's mold and alternaria mold.
The first gist is the antifungal coating composition. (A) Substituted phenolic compound. (B) Carbamic acid compound.

The second gist of the present invention is an antibacterial and antifungal coating composition containing the following components (A) to (C), which are excellent in the effect on the mold of spider mold and the mold of Alternaria. (A) Substituted phenolic compound. (B) Carbamic acid compound. (C) Pyrithione compound.

[0007] That is, the present inventors have conducted extensive research to obtain, in place of conventionally used antibacterial agents, those having a low toxicity and a high effect of preventing the growth of microorganisms such as mold. As a result, when a compound in which a substituted phenol compound [(A) component] and a carbamic acid compound [(B) component] are used in combination as an antibacterial / antifungal agent, both these components have low toxicity. Is highly safe, and
The inventors of the present invention have found that a high effect of preventing the attachment and reproduction of microorganisms, which could not be obtained by the antibacterial and antifungal effects of the above compounds alone, can be obtained over a long period of time, and thus reached the present invention. Then, the ratio of both components (A) and (B) may be set within a range of 0.1 to 3.0 parts with respect to 100 parts by weight of the matrix component (hereinafter abbreviated as "part"). It has been found that it is particularly preferable in terms of its antibacterial and antifungal effect and cost.

Further, in addition to the above-mentioned two compounds (A) and (B), a pyrithione compound [(( The present invention has been found that the combined use of (C) component] provides high safety because the (C) component is also low in toxicity, and further, further excellent antibacterial and antifungal effects can be obtained over a long period of time. . And (A)-
In the combined use of three kinds of compounds of the component (C), it is necessary to set the content ratio of each component within the range of 0.1 to 3.0 parts with respect to 100 parts of the matrix component. It has been found that it is particularly preferable in terms of cost and the like.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail.

The antibacterial and antifungal coating composition of the present invention contains a matrix component which is a main element for forming a coating film, a substituted phenol compound (A component) and a carbamic acid compound (B component). Obtained from that. Furthermore, the pyrithione-based compound (C
It is obtained by containing (component). In the present invention,
The matrix component is a film-forming component that is a main raw material for forming a film, and does not include a film-forming subelement that is a diluent such as water and a solvent.

The matrix component is not particularly limited, and conventionally known ones can be mentioned. For example, from the viewpoint of good adhesion and leveling properties,
Examples thereof include methacrylic acid ester, polyurethane, ethylene-vinyl acetate copolymer, acrylic silicone obtained by reacting acrylic resin with silicone resin, and the like. Further included are all film forming components that are used as emulsion or solvent systems.

Examples of the substituted phenolic compound (component A) which is one of the above organic antibacterial agents include alkyl-substituted phenolic compounds such as 3-methyl-4-isopropylphenol and 2-isopropyl-5-methylphenol. ，
Examples thereof include halogen-substituted phenol compounds such as 3,4,6-tetrachlorophenol, 2,4,6-trichlorophenol, and 2,4,6-tribromophenol. These may be used alone or in combination of two or more. Among them, it is particularly preferable to use 3-methyl-4-isopropylphenol and 2-isopropyl-5-methylphenol from the viewpoint of safety and no gelation as a coating composition.

Examples of the carbamic acid compound (component B) used together with the substituted phenol compound (component A) include 3-iodo-2-propynyl-butylcarbamate and methyl-1- (butylcarbamoyl) -2-benzimidazole. Carbamate, methyl 5-butyl-2-benzimidazole carbamate, zinc dimethyldithiocarbamate, ammonium N-methyldithiocarbamate and the like can be mentioned. These may be used alone or in combination of two or more. Among them, 3-iodo-2-propynyl-butylcarbamate, methyl-1- (butylcarbamoyl) -2-benzimidazole carbamate, 5-butyl-2-, from the viewpoint of safety and no gelation as a coating composition. Particular preference is given to using methyl benzimidazole carbamate.

As described above, by using the above components A and B together, the desired antibacterial and antifungal effects can be obtained over a long period of time. In this case, the contents of the A component and the B component are preferably set within the range of 0.1 to 3.0 parts for each of the A component and the B component with respect to 100 parts of the matrix component. Particularly preferably, the components A and B are each in the range of 0.7 to 1.3 parts in consideration of both cost and antibacterial and antifungal effects. That is, if the content ratio of each of the components A and B is too small, such as less than 0.1 part, it is difficult to obtain the desired antibacterial / antifungal effect, and conversely, if it exceeds 3.0 parts, the cost is increased. This is because the coating film performance tends to be high, and the coating film properties, that is, the physical properties of the coating film such as adhesion and coating film strength tend to deteriorate.

A particularly preferred combination of the above-mentioned components A and B is a substituted phenol from the viewpoint of cost, high safety, and the possibility that gelation will not occur when the coating workability is taken into consideration. A combination in which 3-methyl-4-isopropylphenol is used as the system compound (component A) and 3-iodo-2-propynyl-butylcarbamate is used as the carbamic acid compound (component B) can be mentioned.

Further, in the antibacterial and antifungal coating composition of the present invention, by using a pyrithione compound (C component) in addition to the above-mentioned components A and B, a more excellent antibacterial and antifungal effect can be obtained. It will be obtained over a long period of time. Examples of the pyrithione-based compound (component C) include zinc-2-pyridinethiol-1-oxide, sodium pyridinethiol-1-oxide, and the like. These may be used alone or in combination of two or more. Among them, zinc-2-pyridinethiol-1-oxide is particularly preferably used from the viewpoint of safety and no gelation as a coating composition.

When the three components A to C are used in combination, the content ratio is set to the range of 0.1 to 3.0 parts for each of the components A to C with respect to 100 parts of the matrix component. preferable. Particularly preferably, the components A to C are each in the range of 0.7 to 1.3 parts in consideration of both cost and antibacterial and antifungal effects. That is, if the content ratio of the components A to C is too small, such as less than 0.1 part, it is difficult to obtain the desired antibacterial and antifungal effect. Conversely, if it exceeds 3.0 parts, the cost becomes high. Also, the coating film performance, that is, the physical properties of the coating film such as adhesion and coating film strength tend to deteriorate.

As a particularly preferred combination of the above-mentioned components A to C, the above-mentioned two components (components A and B) are used.
As in the case of the combined use of (Component), the substituted phenol compound (Component (A)) is used as a substituted phenol compound (A component) from the viewpoints of cost, high safety and no possibility of gelation in consideration of coating workability. -Methyl-4-isopropylphenol was used as a carbamic acid compound (component B), 3-
With iodo-2-propynyl-butyl carbamate,
As a pyrithione compound (component C), a combination using zinc-2-pyridinethiol-1-oxide can be mentioned.

The antibacterial and antifungal coating composition of the present invention comprises, in addition to the above matrix components and components A to C,
If necessary, other additives such as a dispersion aid, a pigment, a dye, an anti-settling agent and the like can be appropriately blended.

As the above-mentioned dispersion aid, there are a wide variety of anionic, cationic, nonionic, fatty acids, silicone, silica and the like.

The above-mentioned pigments and dyes are not particularly limited and conventionally known ones. For example, the pigments include inorganic pigments such as titanium oxide, ultramarine blue and dark blue, insoluble azo pigments, isoindolinone, quinacridone and the like. And higher dyes, and examples of the dyes include disperse dyes and organic solvent-soluble dyes.

The above-mentioned anti-settling agent is not particularly limited, and conventionally known ones such as fatty acids, fatty acid amine salts, silicones, anionic, cationic and nonionic surfactants can be mentioned.

The antibacterial and antifungal coating composition of the present invention comprises the matrix component, the A component and the B component, and in addition to these components, the C component and, if necessary, other additives. , For example, can be obtained as follows.
That is, a matrix component and a diluent such as water and a solvent (coating film formation assisting component) are added. Then, to this,
In addition to the above-mentioned components A and B, or both of them, the component C is blended so as to have a predetermined content ratio, and further, if necessary, other additives are blended and stirred by a dispersion mixer, static mixer or the like. -It is obtained by mixing and uniformly dispersing so as not to cause secondary aggregation.

The antibacterial and antifungal coating composition thus obtained is applied to predetermined portions and parts by a conventional coating method such as spray coating, dipping, brush coating, roller coating and the like. The coating film is formed to have an appropriate paint film thickness. At this time, the viscosity of the antibacterial / antifungal coating composition is appropriately selected in consideration of coating workability according to the coating method and the like. Generally, the viscosity of the antibacterial and antifungal coating composition is 0.005 to 1 Pa · s (5 to 1000 cps)
It is set to the range of.

When the antibacterial and antifungal coating composition of the present invention is an aqueous emulsion type, the particle size of the emulsion and the viscosity of the emulsion type coating are not only the above coating workability but also the storage of the emulsion type coating. It is appropriately selected in consideration of storage stability at the time.

The antibacterial and antifungal coating composition thus obtained is for preventing, for a long period of time, the attachment and reproduction of microorganisms, mainly Rhizopus stronifer (Kunosu mold).

[0027]

INDUSTRIAL APPLICABILITY As described above, the antibacterial and antifungal coating composition of the present invention comprises the above-mentioned substituted phenol compound (component A).
And two kinds of organic antibacterial agent components of a carbamic acid compound (component B). Alternatively, in addition to both of these components A and B, it contains three types of organic antibacterial agent components, which are pyrithione compounds (component C). Therefore, each component has low toxicity and is highly safe even when these components are used in combination. Further, by using these respective components in combination, it is possible to provide a high preventive effect against the propagation of microorganisms, which has not been obtained in the past, and the sustainability of the preventive effect is excellent. This effect is obtained by using the two components of the above-mentioned A component and B component in combination, and by using the C component, a more excellent effect can be obtained. When using each of the above-mentioned components, it is excellent that the content of each of the two-component combination and the three-component combination is set within a range of 0.1 to 3.0 parts with respect to 100 parts of the matrix component. It is particularly preferable from the viewpoints of durability of antibacterial and antifungal effects and cost. Therefore, for example, in recent years, the antibacterial and antifungal coating composition of the present invention is used for a cross flow fan, an outlet, etc., which are internal parts of household and commercial air conditioners in which the reproduction of mold has become a problem. By forming a coating film, it is possible to effectively prevent the growth of microorganisms such as mold, and exert excellent antibacterial and antifungal effects.

Next, examples will be described together with comparative examples.

[0029]

Examples 1 to 10 and Comparative Examples 1 to 8 First, a polyurethane resin was used as a matrix component (coating film forming component), and a diluent that was water (coating film assisting element) was added thereto to prepare an aqueous emulsion paint. Prepared (25% solids). Next, the components shown in Tables 1 to 3 described below were blended in the proportions shown in the same table (blending ratio to 100 parts of the polyurethane resin which is the solid content in the aqueous emulsion paint), and a dispersion mixer was used. A coating composition was obtained by stirring and mixing. The compound name and toxicity of each of the above components are shown below.

[Substituted Phenolic Compound] 3-Methyl-4-isopropylphenol (LD ₅₀ > 6280 mg / kg) represented by the following chemical formula (1).

[0031]

Embedded image

[Carbamic Acid Compound] 3-iodo-2-propynyl-butylcarbamate (LD ₅₀ : 1580 mg / kg) represented by the following chemical formula (2).

[0033]

Embedded image

[Pyrithione Compound] Zinc-2-pyridinethiol-1-represented by the following chemical formula (3)
Oxide (LD ₅₀ > 331 mg / kg).

[0035]

Embedded image

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

Using the coating compositions of Examples and Comparative Examples thus obtained, antibacterial and antifungal effect tests (mold resistance tests 1 to 3) were carried out according to JIS Z2911 (mold resistance test).
The effect was evaluated according to the method described below. Moreover, the presence or absence of gelation in the obtained coating composition was visually observed. The results are shown in Tables 4 to 6 below.

[Mold Resistance Test 1] Each of the coating materials was applied by dipping to a cross flow fan, which is a component of an indoor unit of an air conditioner, to form a coating film, and then subjected to a mold resistance test. This mold resistance test was performed on a culture dish by
Stronifer (Kunosu mold) test spores, Alternaria, and Aspergillus niger (black koji mold) test spores are coated respectively, and the test piece (cross flow fan) on which the above film has been formed is applied to the medium. Then, the cells were cultured at room temperature (25 ° C) for 7 days. Then, after 7 days, the width (m) of the growth prevention zone (halo) of each of the molds (Resorps stoniffer, Alternaria, Aspergillus niger)
m) was measured and the resistance to mold was evaluated.

[Mold resistance test 2] A test piece (cross flow fan) on which a film had been formed was stuck on a medium in the same manner as above, and cultured at a temperature of 60 ° C for 7 days. Then, after 7 days, the width of the growth-preventing zone of the molds (Resorps stronifer, Alternaria, Aspergillus niger) (m
m) was measured and the resistance to mold was evaluated.

[Mold resistance test 3] A test piece (cross flow fan) on which a film had been formed was stuck on the medium in the same manner as described above, and cultured for 7 days at a temperature and humidity of 40 ° C x 100% RH. Then, after 7 days, the width (mm) of the growth prevention zone of the molds (Resorps stronifer, Alternaria, Aspergillus niger) was measured to evaluate the resistance to mold.

[0043]

[Table 4]

[0044]

[Table 5]

[0045]

[Table 6]

From the results of Tables 4 to 6 above, Comparative Examples 1 to 6
In all of the mold resistance tests 1, 2, and 3, the conventional products and the comparative examples 7 and 8 which were the conventional products could not effectively inhibit the growth of mold against spider molds and alternaria. Recognize. In addition, it can be seen that the products of Comparative Examples 5, 7 and 8 could not effectively prevent the growth of Alternaria in all of the mold resistance tests 1, 2 and 3. On the contrary,
All of the example products showed a high antiproliferative effect on the growth of mold in the mold resistance tests 1, 2 and 3, and it is clear that excellent antibacterial and antifungal effects were obtained. Also,
It can be seen that the products of all Examples have excellent coating workability without gelation.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location A01N 55/02 A01N 55/02 B (72) Inventor Masaharu Ota 1006 Kadoma, Kadoma-shi, Osaka Matsushita Denki Sangyo Co., Ltd.

Claims (4)

[Claims] 1. An antibacterial and antifungal coating composition comprising the following components (A) and (B): (A) Substituted phenolic compound. (B) Carbamic acid compound. 2. The contents of the components (A) and (B) are each 0.1 to 100 parts by weight of the matrix component.
The antibacterial and antifungal coating composition according to claim 1, which is set in a range of 3.0 parts by weight. 3. An antibacterial and antifungal coating composition containing the following components (A) to (C). (A) Substituted phenolic compound. (B) Carbamic acid compound. (C) Pyrithione compound. 4. The contents of the components (A) to (C) are 0.1-3.
The antibacterial agent according to claim 3, which is set in a range of 0 parts by weight.
Antifungal coating composition.