JP2000178595A - Cleaning/antifungal property-imparting agent and cleaning/antifungal property-imparting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning/antifungal property-imparting agent, which is excellent in cleaning effect and permits the surface of an article after cleaning to show a continuous antifungal property, by dispersing silver fine particles in water. SOLUTION: This cleaning/antifungal property-imparting agent is obtained by dispersing, in water, 0.001 to 1 wt.% of silver fine particles having an average particle size of 100 nm or below, abrasive particles having a concentration of 1 to 50 times that of the silver fine particles and a particle size of 10 to 80 μm, an anionic surface active agent, a cationic surface active agent, a nonionic surface active agent or an amphoteric surface active agent having a concentration of 0.1 to 50 times that of the silver fine particles, and a condensed phosphate having a concentration of 0.01 to 10 times that of the silver fine particles. The cleaning/antifungal property-imparting agent is applied onto the surface of an article, and the applied surface is rubbed to impart the cleaning/ antifungal property thereto. In this way, the -SH group in the enzyme proteins of all fungi is broken through oxidation, or the -Scrosslinking bond in proteins is broken through oxidation, thereby causing the odor of sebum, the odor of sweat or other odorous components to be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing / antibacterial agent and a method for imparting antibacterial properties to an article surface while washing the article surface, and more particularly to a surfactant. Without using cleaning agents such as
Also, the present invention relates to a washing / antibacterial imparting agent and a washing / antibacterial imparting method capable of greatly reducing the amount of use of these detergents to wash the article surface and imparting a continuous antibacterial property to the article surface.

[0002]

2. Description of the Related Art Conventionally, antibacterial cleansers containing zeolite-based solid particles carrying metal ions having an antibacterial action and optionally containing a surfactant have been used as methods for imparting cleaning and antibacterial properties, and As a method of using this antibacterial cleanser, a method is known in which the surface of an article is polished and washed using the antibacterial cleanser, and the antibacterial zeolite is retained on the unevenness of the article surface.

[0003] Further, as a cleaning composition in which a predetermined amount of a silver salt and / or a copper salt is added to a surfactant, and as a method of using the cleaning composition, water, the cleaning composition and the cleaning substance are added. While stirring for about 10-20 minutes and washing,
There is also known a method of decomposing odor components adhering to a cleaning object to make it odorless and imparting an antibacterial effect to the cleaning object even after the cleaning.

[Problems] However, in the method for imparting and cleaning antibacterial properties using the antibacterial cleanser, the antibacterial components are merely held on the irregularities on the surface of the article, and the antibacterial components are easily removed by rinsing or the like. There was a problem that the antibacterial effect was lost in a relatively short time because the antibacterial component was not sufficiently retained because of the outflow.

[0005] Further, in the above-described method for imparting and cleaning antibacterial properties using a cleaning composition in which a predetermined amount of a silver salt and / or a copper salt is added to a surfactant, although a good cleaning action is exhibited,
For example, in the case of using tap water, particles of silver chloride or copper chloride precipitate due to chlorine contained in the tap water, and the particles are coarse and are not easily held on the surface of the article, so that the holding amount of the antibacterial component is not sufficient. There was a problem that the antibacterial effect was not sufficiently persistent and disappeared in a relatively short time. Further, in the case of a cleaning composition using a silver salt, there is a problem that the skin blackens when it adheres to the skin.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a specific problem set for solving the problems is that the cleaning effect is excellent while the cleaning effect is excellent. An object of the present invention is to provide a cleaning / antibacterial property imparting agent and a cleaning / antibacterial property imparting method capable of continuously exhibiting antibacterial properties on the surface of an article.

[0007]

Means for Solving the Problems The cleaning / antibacterial property-imparting agent according to claim 1 of the present invention, as a concretely constituted means capable of effectively solving the above-mentioned problems, has an average particle diameter of 100.
It is characterized by comprising an aqueous dispersion of silver fine particles having a diameter of not more than nm.

[0008] The cleaning / antibacterial property imparting agent according to claim 2 is characterized in that the cleaning / antibacterial property imparting agent according to claim 1 contains at least one of abrasive particles, a surfactant, a condensed phosphate, and a dispersant. It is further characterized by being contained.

A third aspect of the present invention provides a method for imparting cleaning and antibacterial properties, wherein the agent for imparting cleaning and antibacterial properties according to the first aspect is applied to the surface of an article, and the applied surface is rubbed.

[0010]

Embodiments of the present invention will be described below in detail. However, this embodiment is specifically described for better understanding of the spirit of the invention, and does not limit the contents of the invention unless otherwise specified.

[Structure] The detergent / antibacterial property imparting agent according to the present embodiment comprises an aqueous dispersion of silver fine particles having an average particle diameter of 100 nm or less. If the average particle size exceeds 100 nm, the detergency may decrease, and the diffusing power into the surface layer of the article may decrease. Even when the average particle size is 100 nm or less, inorganic colloids carrying silver, such as silver-supported zeolite and silver-supported silica gel, are unsuitable because of their low detergency and poor diffusing power into the surface layer of the article. is there.

The amount of silver fine particles added to the washing / antibacterial agent is not particularly limited, but is preferably 0.001 to 1% by weight in actual use (dilution). . When the amount of the silver fine particles is less than 0.001% by weight, the detergency is reduced and the antibacterial effect is insufficient. On the other hand, when the amount exceeds 1% by weight, excess silver which does not contribute to the cleaning and antibacterial effect is provided. This is uneconomical due to the presence of fine particles.

The detergent / antibacterial agent may contain at least one selected from the group consisting of abrasive particles, a surfactant, a condensed phosphate, and a dispersant. Of these, abrasive particles are added to further improve the detergency by rubbing the surface of the article and to form fine irregularities on the surface of the article to facilitate diffusion of silver fine particles.

The abrasive particles include silica, perlite, shirasu, clay, feldspar, calcium carbonate, sand, calcium phosphate, iron oxide, aluminum oxide, titanium oxide,
Known abrasive particles such as barium carbonate can be used. The size of the abrasive particles is not particularly limited, and is usually from 10 to 80 μm. The amount of the abrasive particles is not particularly limited, but is usually about 1 to 50 times the silver fine particle concentration.

The surfactant is added to further improve the detergency, and any of an anionic surfactant, a cationic surfactant, a nonionic surfactant and an amphoteric surfactant is used. Can be used. The addition amount is not particularly limited, but is usually 0.1% of the silver fine particle concentration.
It is about 50 times.

Examples of the anionic surfactant include soap, an alkylbenzene sulfonate such as sodium dodecylbenzenesulfonate, and SO ₃ Na directly on an alkyl group.
SO ₃ There alkyl sulfonate was added, in naphthalene
Na-added β-tetrahydronaphthalene sulfonate, acid sulfonates such as sodium N-isopropylcyclohexylacid sulfonate, higher fatty acid salts such as sodium oleate, di-2-ethylhexyl sodium sulfosuccinate, etc. Dialkyl sulfosuccinate and the like.

Examples of the cationic surfactant include alkylammonium chloride, and specific examples thereof include octadecyltrimethylammonium chloride, alkyl (coconut) trimethylammonium chloride, hexadecyldimethylbenzylammonium chloride, octadecyldimethylbenzylammonium chloride, and dodecyl. Trimethylammonium chloride and the like.

Examples of the nonionic surfactant include polyoxyethylene monostearyl ester, polyoxyethylene monooleyl ester, polyoxyethylene monolauryl ester, polyoxyethylene octyl phenol ether, polyoxyethylene cetyl ether, polyoxyethylene nonyl phenol ether, Polyoxyethylene sorbitan monostearate, polyoxyethylene sulfone trioleate and the like can be mentioned.

Examples of the amphoteric surfactant include alkyl betaine and alkyldiethylenetriaminoacetic acid.

The condensed phosphate is added to secure the chlorine stability of the silver fine particles, and condensed phosphate ions are adsorbed around the silver fine particles to be stabilized. Specific examples of the condensed phosphate include sodium hexametaphosphate and potassium hexametaphosphate.
The amount of addition is not particularly limited, but is usually preferably about 0.01 to 10 times the silver fine particle concentration.

The dispersing agent is added to stably disperse the silver fine particles. Specific examples thereof include alcohols such as ethyl alcohol, cellosolves such as butyl cellosolve, ketones such as acetone, and diethyl ether. Ethers and the like. The addition amount is not particularly limited, but is usually 0.01% of the silver fine particle concentration.
About 10 times is preferable.

The method for imparting cleaning and antibacterial properties according to this embodiment is carried out by applying the above-mentioned agent for imparting cleaning and antibacterial properties to the surface of an article and rubbing the coated surface. Here, "applying" includes immersion in addition to spraying, and "rubbing" includes rubbing and rubbing. In addition, it also includes a case where a cleaning / antibacterial property imparting agent is contained in paper or cloth, and the article surface is rubbed with the paper / cloth or the like containing the cleaning / antibacterial property imparting agent. The friction force when rubbing the application surface is not particularly limited.

[Function and Effect] Since silver fine particles having an average particle diameter of 100 nm or less are dispersed in the detergent / antibacterial property imparting agent, the silver fine particles modify the washing water and reduce the amount of surfactant used. Can be significantly reduced, or the cleaning effect can be sufficiently improved without using a surfactant.

Although the reason for this is not always clear, it is considered as follows. That is, oxygen in water is ionized by the silver fine particles, and highly reactive ionized oxygen is generated. Then, water having strong oxidizing power is produced by the direct action of the ionized oxygen and the silver fine particles.

This water has the following characteristics. (1) It oxidatively destroys -SH groups in enzyme proteins of all bacteria and oxidatively destroys -S-crosslinks in proteins. (2) Oxidatively destroys sebum odor, sweat odor, and other odor components. (3) Oxidatively destroys sebum and sweat components. (4) Hydrogen bonds in water molecules have been broken, and the water has been reformed into water with high osmotic and dissolving power.

As described above, water having a strong oxidizing power and modified water decomposes and disperses dirt components such as sebum and protein dirt by oxidative decomposition power and dissolving power. The force is large and the frictional force due to the friction is added, so that the article can be efficiently cleaned without using a small amount of a cleaning agent or using a cleaning agent.

On the other hand, silver fine particles having an average particle diameter of 100 nm or less have an excellent migration effect, and easily diffuse from the article surface into the article surface layer by lightly rubbing the coated surface. Therefore, even if rinsing is performed after washing, the antibacterial property is not lost, and a persistent antibacterial property is imparted to the article surface.

The type of the article to be washed and imparted with antibacterial properties is not specified, and is not limited to metal, plastic, glass, wood, ceramics, ceramics, textiles, etc.
Hair etc. can also be illustrated. These articles may be porous or dense.

[0029]

The present invention will be specifically described below with reference to examples. (Preparation of Silver Fine Particle Dispersion) An aqueous dispersion of silver fine particles commonly used in each Example was prepared as follows. "A ferrous sulfate solution was added to a silver citrate solution to obtain a dispersion of silver fine particles, which was filtered and washed, and the obtained silver fine particles were dispersed again in water. Sodium acid to a concentration of 2% by weight and an average particle size of 45 n
m, a silver particle dispersion having a silver concentration of 2% by weight. "

Example 1 The prepared aqueous dispersion of silver fine particles was used as a washing / antibacterial agent. A liquid (silver concentration: 0.2% by weight) obtained by diluting the washing / antibacterial agent 10 times with tap water is impregnated into a sponge bundle and rubbed lightly with a plastic chopping plate after being used for ordinary work. The cleaning condition of the surface of the chopping board was observed. The plastic chopping board was then placed at 37 ° C and 85% relative humidity.
After 24 hours, 48 hours and 72 hours, the surface of the plastic chopping board was observed for any unusual odor. The results are shown in the table.

Example 2 A washing / antibacterial property-imparting agent having the following composition was obtained using the above-prepared silver fine particle dispersion. Silver fine particle dispersion (silver concentration 2% by weight) 20 parts by weight Polyoxyethylene alkyl ether 3 parts by weight Sodium polyoxyethylene alkyl ester sulfate 2 parts by weight Sodium linear alkylbenzene sulfonate 2 parts by weight Water 73 parts by weight Washing and antibacterial The cleaning state of the surface of the plastic chopping board and the presence or absence of an odor from the plastic chopping board surface were the same as in Example 1 except that a liquid (silver concentration: 0.2% by weight) obtained by diluting the water-imparting agent with tap water was used. Observed. The results are shown in the table.

Example 3 100 parts by weight of the washing / antibacterial property imparting agent of Example 2 was mixed with silica particles (a particle size of 320) as an abrasive.
(Mesh) was added in an amount of 10 parts by weight to obtain a detergent / antibacterial agent. The cleaning state of the surface of the plastic chopping board and the presence or absence of an unusual odor from the plastic chopping board surface were observed in the same manner as in Example 1 except that a liquid obtained by diluting the washing / antibacterial property imparting agent with tap water was used. The results are shown in the table.

[Comparative Example 1] A plastic chopping board was washed with tap water, and the other conditions were the same as in Example 1, and the surface of the plastic chopping board was washed, and the presence or absence of an odor from the plastic chopping board surface was observed. . The results are shown in the table.

Comparative Example 2 A 2% by weight (in terms of silver) aqueous dispersion of an antibacterial zeolite obtained by ion-exchange of silver to a Y-type zeolite was used. Agent was obtained. This washing / antibacterial agent was diluted twice with tap water (silver concentration: 0.2% by weight), and the other conditions were the same as in Example 1, except for the cleaning state of the surface of the plastic cutting board and the surface of the plastic cutting board. The presence or absence of an off-flavor was observed. The results are shown in the table.

Comparative Example 3 2% by weight of silver nitrate (in terms of silver)
A washing / antibacterial property-imparting agent was obtained by using an aqueous solution and otherwise following the procedure of Example 2. Thereafter, a liquid (silver concentration: 0.2% by weight) obtained by diluting the washing / antibacterial property imparting agent twice with tap water was used. The presence or absence of off-flavors from the surface of the board was observed. The results are shown in the table.

[0036]

[Table 1]

[0037]

The cleaning / antibacterial property imparting agent according to the first aspect of the present invention is composed of an aqueous dispersion of silver fine particles having an average particle diameter of 100 nm or less. Sustained antibacterial properties can be imparted to the article surface.

The cleaning / antibacterial property-imparting agent according to the second aspect is characterized in that the cleaning / antibacteriality-imparting agent of the first aspect has at least one of abrasive particles, a surfactant, a condensed phosphate, and a dispersant.
Since the seeds are further contained, the cleaning effect and the ability to impart a sustained antibacterial property can be more effectively enhanced.

In the method for imparting cleaning and antibacterial properties according to the third aspect of the present invention, a cleaning and antibacterial property imparting agent is applied to the surface of the article and the applied surface is rubbed. It can be washed without using a cleaning agent such as an activator or with a very small amount of use, and can impart a persistent antibacterial property to the article surface.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI theme coat ゛ (Reference) C23C 26/00 C23C 26/00 (72) Inventor Yasuyuki Kurino 585 Tomicho, Funabashi-shi, Chiba Sumitomo Osaka Cement (72) Inventor Takako Yazawa 585 Tomicho, Funabashi-shi, Chiba Sumitomo Osaka Cement Co., Ltd.F-term (reference) 4C058 AA01 AA06 BB07 JJ05 JJ21 JJ23 JJ24 4H003 AB19 AB31 AC08 BA12 DA01 DA02 DA05 DA17 EA25 EA28 ED02 FA27 FA34 4H011 AA02 BB18 BC18 DA15 DE17 DF03 DG16 4K044 AA01 AA11 AA12 AA13 AA16 BA08 BA11 BA12 BA13 BA14 BA17 BA21 BB01 CA51 CA53

Claims (3)

[Claims] 1. A detergent / antibacterial property imparting agent comprising an aqueous dispersion of silver fine particles having an average particle diameter of 100 nm or less. 2. An abrasive particle, a surfactant, a condensed phosphate,
The cleaning / antibacterial property-imparting agent according to claim 1, comprising at least one kind of dispersant. 3. A method for imparting cleaning and antibacterial properties, which comprises applying the agent for imparting cleaning and antibacterial properties according to claim 1 to the surface of an article and rubbing the coated surface.