JP2021042175A - Antibacterial/antifungal treatment agent - Google Patents

Abstract

To provide an antibacterial/antifungal treatment agent that is friendly to human bodies and the environment and allows a coating thereof to be easily peeled off.SOLUTION: A antibacterial/antifungal treatment agent contains, in a fluorine-based solvent, a perfluoroalkyl group-containing compound consisting of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate, and isopropylmethylphenol dissolved in alcohol.SELECTED DRAWING: None

Description

The present invention relates to an antibacterial / antifungal treatment agent.

As an antibacterial treatment, for example, a method of kneading an antibacterial agent into a material such as resin, coating or metal, or forming a surface having an antibacterial action such as titanium oxide has been devised. However, the antibacterial action did not last semi-permanently or permanently, and it was impossible to avoid the adhesion and accumulation of dirt and dust in a short period of time.

On the other hand, Patent Document 1 discloses an invention relating to an antibacterial coating agent applied by brush coating, spraying or the like. Patent Document 1 describes an aqueous urethane resin, a hydrophilic oil repellent (copolymer of a (meth) acrylate having a perfluoroalkyl group having 3 to 20 carbon atoms and an alkylene glycol (meth) acrylate), and an antibacterial agent (isothiazolin-based). Antibacterial coating agents containing (compounds, etc.) are disclosed.

Japanese Unexamined Patent Publication No. 2017-8251

By the way, in the conventional antibacterial and antifungal treatment agents, agents having effective antibacterial and antifungal functions are used, and if the medicinal effect is made too strong, there is a problem of damaging the human body and the environment.

In addition, if the adhesion of the film made of antibacterial and antifungal treatment agent to the protected surface is strengthened, there is a problem that cleaning and regeneration will be troublesome if the film cannot be easily peeled off from the protected surface, and antibacterial due to the adhesion and accumulation of dirt. -There was also a problem that the antifungal effect itself could not be exhibited.

Therefore, the present invention has been made in view of such a problem, and an object of the present invention is to provide an antibacterial / antifungal treatment agent which is friendly to the human body and the environment and can easily peel off a film.

The antibacterial / antifungal treatment agent in the present invention is a perfluoroalkyl group-containing compound composed of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate in a fluorine-based solvent, and an alcohol. It is characterized by containing isopropylmethylphenol dissolved in.

In the present invention, the perfluoroalkyl group-containing compound is preferably contained in an amount of 0.05% by mass or more.

In the present invention, the perfluoroalkyl group-containing compound preferably has 6 or less carbon atoms.

In the present invention, the isopropylmethylphenol is preferably contained in an amount of 0.1% by mass or more.

In the present invention, the alcohol has preferably 3 or less carbon atoms.

According to the antibacterial and antifungal treatment agent of the present invention, it is friendly to the human body and the environment, the film can be easily peeled off for clean regeneration, and dirt adhesion and accumulation can be prevented.

Hereinafter, one embodiment of the present invention (hereinafter, abbreviated as “embodiment”) will be described in detail. The present invention is not limited to the following embodiments, and can be variously modified and implemented within the scope of the gist thereof.

As a result of intensive research on antibacterial and antifungal treatment agents applicable to indoor equipment such as medical institutions, kitchen utensils, bathroom members, and toilet members, the present inventor does not use a strong medicinal effect. Antibacterial and antifungal treatment that prevents the adhesion of organic substances such as water involved in the growth of mold and the growth of fungi and the protein that is the nutrient for cultivation, is friendly to the human body and the environment, and can easily peel off the film. It came to develop the agent.

That is, the antibacterial / antifungal treatment agent in the present embodiment is a perfluoroalkyl group-containing compound composed of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate in a fluorine-based solvent. It is characterized by containing isopropylmethylphenol dissolved in alcohol.

Here, examples of the fluorocarbon solvent include, but are not limited to, hydrofluorocarbon (HFC), hydrochlorofluorocarbon (HCFC), perfluorocarbon (PFC), hydrofluoroether (HFE), and the like. ..

In the present embodiment, a perfluoroalkyl group-containing compound consisting of at least one of a perfluoroalkyl acrylate having 6 or less carbon atoms and a perfluoroalkyl methacrylate is contained in a fluorine-based solvent in an amount of 0.05% by mass or more. It is preferable to do so.

Here, as the perfluoroalkyl group-containing compound, perfluorooctaneic acid or perfluorooctanesulfonic acid is generally used as a raw material or an intermediate in the production stage. These perfluorooctane acid and perfluorooctane sulfonic acid are also generated when the perfluoroalkyl group-containing compound is thermally decomposed. Since these perfluorooctanesulfonic acids and perfluorooctaneic acids exist extremely stably in the environment, there are self-regulations prohibiting the manufacture and use of these perfluorooctanesulfonic acids and perfluorooctaneic acids in related companies from the viewpoint of environmental protection. Therefore, a perfluoroalkyl group-containing compound that does not contain perfluorooctaneic acid and perfluorooctanesulfonic acid, which are subject to regulation in the raw materials and intermediates and their decomposition products at the production stage, is preferable. Therefore, in the present embodiment, the carbon number of the perfluoroalkyl group-containing compound is set to 6 or less.

In the present embodiment, by containing a water-repellent perfluoroalkyl group-containing compound, it is possible to suppress retention of water involved in the growth of mold and the growth of major fungi. In addition, it is possible to effectively prevent the adhesion of organic substances such as proteins as nutrients necessary for the growth of molds and fungi. As a result, the growth of mold and the growth of fungi can be effectively suppressed.

In this embodiment, one or both of the perfluoroalkyl acrylate and the perfluoroalkyl methacrylate can be included. By containing the perfluoroalkyl acrylate, the wet performance of the film can be improved, the film has tackiness, and the film can be made to last for a long time. On the other hand, the inclusion of perfluoroalkyl methacrylate can improve the dry performance of the film.

In the present embodiment, it is preferable that the perfluoroalkyl group-containing compound is contained in an amount of 0.05% by mass or more. The weight% is a value in which all the components contained in the antibacterial / antifungal treatment agent are 100% by mass.

By containing 0.05% by mass or more of the perfluoroalkyl group-containing compound, the growth of mold and the growth of fungi can be effectively suppressed. Further, the upper limit of the content of the perfluoroalkyl group-containing compound can be the dissolution limit in the fluorine-based solvent. Specifically, the upper limit of the content of the perfluoroalkyl group-containing compound is preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably 2% by mass or less. ..

Further, in the present embodiment, it is preferable that isopropylmethylphenol is contained in a fluorine-based solvent in a state of being dissolved in an alcohol having 3 or less carbon atoms.

The isopropylmethylphenol may be either 3-isopropyl-4-methylphenol or 2-isopropyl-5-methylphenol.

Isopropylmethylphenol cannot be dissolved directly in a fluorinated solvent. Therefore, in the present embodiment, isopropylmethylphenol is dissolved in alcohol and then contained in a fluorine-based solvent. The alcohol used preferably has 3 or less carbon atoms in order to increase the solubility of isopropylmethylphenol. That is, the alcohol is preferably methanol, ethanol, or propanol.

Isopropylmethylphenol has antibacterial properties and is excellent in safety without adversely affecting the human body or the environment.

In the present embodiment, isopropylmethylphenol is preferably contained in a fluorine-based solvent in an amount of 0.05% by mass or more, more preferably 0.1% by mass or more. This weight% is a value in which all the components contained in the antibacterial / antifungal treatment agent are 100% by mass. In particular, when isopropylmethylphenol is contained in a fluorine-based solvent in an amount of 0.1% by mass or more, remarkable antibacterial and antifungal performance can be exhibited as compared with a comparative example in which only a fluorine-based treatment agent is used.

The upper limit of the content of isopropylmethylphenol can be the upper limit of dissolution in a fluorine-based solvent. Specifically, the upper limit of the content of isopropylmethylphenol is preferably 3% by mass or less, and more preferably 1% by mass or less.

The film formed by applying the antibacterial / antifungal treatment agent of the present embodiment to the protected surface by spraying or the like is relatively fragile, and can be easily peeled off from the protected surface by artificial work such as wiping with a cloth. can do. The antibacterial and antifungal performance of the film deteriorates with the passage of time, and the performance further deteriorates due to the adhesion of dirt, dust, etc. to the surface. Therefore, it is preferable that the film having deteriorated antibacterial and antifungal performance can be easily peeled off from the protected surface by wiping so that the protected surface can be repeatedly coated with a film having high antibacterial and antifungal performance. .. In the present embodiment, a perfluoroalkyl group-containing compound composed of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate, a perfluoro group-containing compound, an alcohol, and an isopropylmethylphenol are contained in a fluorine-based solvent. However, according to the film formed by using the antibacterial / antifungal treatment agent composed of these components, it can be easily peeled off from the protected surface, and dirt adhesion and accumulation can be prevented. However, the film has appropriate adhesion to the protected surface, and even if the film of the present embodiment is formed in a place where water flows or is exposed to wind, it can be easily peeled off by the action of water or wind. There is no.

The method for producing the antibacterial / antifungal treatment agent of the present embodiment is
(1) A step of containing a perfluoroalkyl acrylate and a perfluoroalkyl group-containing compound consisting of at least one of perfluoroalkyl methacrylate in a fluorine-based solvent.
(2) A step of dissolving isopropylmethylphenol in alcohol,
(3) The step of containing isopropylmethylphenol dissolved in alcohol in a fluorine-based solvent is included.

In the step (1) above, the number of carbon atoms of the perfluoroalkyl group-containing compound is preferably 6 or less. Further, it is preferable that the perfluoroalkyl group-containing compound is contained in a fluorine-based solvent in an amount of 0.05% by mass or more.

Further, in the step (2) above, it is preferable to dissolve isopropylmethylphenol in an alcohol having 3 or less carbon atoms. Further, isopropylmethylphenol is preferably contained in a fluorine-based solvent in an amount of 0.05% by mass or more, more preferably 0.1% by mass or more.

Since isopropylmethylphenol is not directly dissolved in a fluorine-based solvent, in the present embodiment, isopropylmethylphenol is contained in a fluorine-based solvent in a state of being dissolved in alcohol. As a result, the antibacterial / antifungal treatment agent can contain isopropylmethylphenol as an antibacterial agent together with the perfluoroalkyl group-containing compound.

By applying or spraying the antibacterial / antifungal treatment agent of the present embodiment on the protected surface, a film having antibacterial / antifungal performance can be formed. The film contains at least a perfluoroalkyl group-containing compound consisting of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate, and isopropylmethylphenol. Alcohol and the fluorine-based solvent do not remain in the film or hardly remain in the film due to volatilization. By including the perfluoroalkyl acrylate in the film, tackiness can be imparted and appropriate adhesion to the protected surface can be maintained.

The application of the antibacterial / antifungal treatment agent of the present embodiment is not limited, but for example, kitchen members such as sinks and kitchen hoods, bathroom members such as bathroom walls and bathtubs, and toilet seats and toilet bowls. Examples include members, indoor members such as chairs and desks, and various medical articles.

Hereinafter, the present invention will be described in detail with reference to examples carried out to clarify the effects of the present invention. The present invention is not limited to the following examples.

In the following, antibacterial and antifungal performance experiments were conducted on red water mold (Rhodotorula) that easily occurs in the bathroom and black mold that occurs in the toilet using examples and comparative examples.

In the experiment, no treatment (Comparative Example 1), only a fluorine-based treatment agent (Comparative Example 2), and various treatment agents of a fluorine-based treatment agent + isopropylmethylphenol (Example) were applied to a bathroom or a toilet. The outbreak of mold was observed.

In Comparative Example 1, Comparative Example 2 and Example, the observation surface was first washed with a chlorine-based bactericidal agent, and then in Comparative Example 1, observation was performed without any particular treatment, and Comparative Example 2 and Example were observed. In No. 1, various treatment agents were applied to the observation surface for observation.

In Comparative Example 2, a treatment agent dissolved in 0.2% by mass of perfluoroalkyl acrylate HFC-365mfc was used.

In Example 1, a treatment agent in which 0.2% by mass of perfluoroalkyl acrylate was dissolved in HFC-365mfc and 0.1% by mass of isopropylmethylphenol was dissolved in ethyl alcohol and contained in HFC-365mfc. Was used.

Here, in both Comparative Example 2 and Example 1, the content is a value adjusted with respect to the total amount.

In the experiment, after each treatment of Comparative Example 1, Comparative Example 2 and Example 1 was applied to a predetermined area around the drain outlet of the bathroom, the amount of red mold generated was observed every week.

In addition, after each treatment of Comparative Example 1, Comparative Example 2 and Example 1 was applied to a predetermined area of the toilet bowl, the amount of black mold generated was observed every week.
The experimental results are shown in Table 1 below.

〇 indicates that no mold is generated, Δ indicates that 0% to 30% of mold is generated in the area ratio, × indicates that 30% to 50% of mold is generated in the area ratio, and XX. Indicates the occurrence of mold of 50% or more in area ratio.

As shown in Table 1, in both the bathroom and the toilet, Example 1 effectively showed higher antibacterial and antifungal performance as compared with Comparative Examples 1 and 2. In Example 1, in Comparative Example 2, the mold occurrence rate could be suppressed to 50% or less in terms of area ratio from the week when mold growth of 80% or more occurred to about 5 weeks or more.

Next, as Example 2, 0.2% by mass of perfluoroalkyl acrylate was dissolved in HFC-365mfc, and 0.05% by mass of isopropylmethylphenol was dissolved in ethyl alcohol and contained in HFC-365mfc. The treatment agent used was used. Here, the content shown in Example 2 is a value adjusted with respect to the total amount.

On a different day from the experiment in Table 1 above, the treatments of Comparative Example 1, Comparative Example 2 and Example 2 were performed in the vicinity of the drain outlet of the bathroom and the predetermined area of the toilet bowl in the same manner as in the experiment of Table 1. The amount of mold generated was observed weekly. The experimental results are shown in Table 2 below.

As shown in Table 2, Example 2 was able to improve the antibacterial and antifungal performance as compared with Comparative Examples 1 and 2.

However, as in Example 1, it was found that by containing 0.1% by mass of isopropylmethylphenol, a treatment agent exhibiting high antibacterial and antifungal performance can be obtained more effectively.

Therefore, it is preferable that isopropylmethylphenol is contained in an amount of 0.05% by mass or more, and more preferably 0.1% by mass or more.

Claims (5)

In a fluorosolvent,
Perfluoroalkyl group-containing compound consisting of at least one of perfluoroalkyl acrylate and perfluoroalkyl methacrylate.
Isopropylmethylphenol dissolved in alcohol and
An antibacterial and antifungal treatment agent characterized by containing. The perfluoroalkyl group-containing compound is an antibacterial / antifungal treatment agent containing 0.05% by mass or more. The antibacterial / antifungal treatment agent according to claim 1 or 2, wherein the perfluoroalkyl group-containing compound has 6 or less carbon atoms. The isopropylmethylphenol is an antibacterial and antifungal treatment agent containing 0.1% by mass or more. The antibacterial / antifungal treatment agent according to any one of claims 1 to 4, wherein the alcohol has 3 or less carbon atoms.