JP2002012891A - Cleanser containing photocatalyst - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleanser which cannot only singly and easily cleanse but also carry out a soil-resistant treatment, and/or a deodorizing treatment, and/or an antifungal treatment to reduce the frequency of the cleansing treatments. SOLUTION: This cleanser characterized by containing a surfactant and a photocatalyst.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent which is suitably used for removing various kinds of dirt. The photocatalyst adheres to the surface of a base material only by performing a cleaning operation. The present invention relates to a cleaning agent that also performs a deodorizing and / or antifungal treatment and a cleaning method using the same.

[0002]

2. Description of the Related Art In recent years, women's advancement in society, aging,
Consumers' consciousness of cleaning has been changed due to improvement of daily life consciousness, and it has been desired that simplicity of cleaning, reduction of cleaning time, reduction of the number of times of cleaning, etc. do not take time and effort to maintain cleanliness of the house. For such a demand, when considering a cleaning agent for a house, a single cleaning agent performs simple cleaning in various usage scenes, as well as an antifouling function, an odor preventing function,
There is a demand for the development of a detergent that can impart a fungicide function and the like and can reduce the number of times of cleaning. On the other hand, as one of the environmental purification methods, a photocatalyst represented by titanium oxide has attracted attention, and is supported on glass, metal, plastic, paper, fiber, etc., and has functions such as antibacterial, antifungal, antiodor, and antifouling. Researches pursuing are being actively pursued. For example, most of dirt generated in a room of a general household is organic, such as dust generated from fiber pieces of clothes, fine particles such as oil used for cooking, and dead bodies of mites. The present inventors have paid attention to this fact and have proposed a simple antifouling method utilizing the organic substance decomposition action of the photocatalyst (Japanese Patent Application Laid-Open No. 9-316435, Japanese Patent Application Laid-Open No. H11-316435).
172158). However, in these methods, the durability of the thin film formed by attaching the photocatalyst to the target surface is inferior, and at the same time, a cleaning operation for removing dirt is required in advance. Did not respond to. Numerous studies have also been conducted on a method for forming a durable photocatalytic thin film at room temperature. Among them, there is a proposal to use a photocatalyst and a surfactant together with a thin film forming component. Activators include photocatalytic thin film formation, coating compositions, thin film bases,
Alternatively, it was only used as an auxiliary agent for making the surface of the substrate hydrophilic.

Japanese Patent Application Laid-Open No. H11-323191 discloses that titanium oxide and a fluorine-based surfactant are used together with a thin film-forming component. In addition, since alkoxysilane is used as a thin film forming component, water cannot be used as a solvent or a dispersion medium, which is not preferable as a cleaning agent. Japanese Patent Application Laid-Open No. 11-088061 mentions the use of a surfactant as an additive whose surface free energy is located between the fluororesin powder and the binder, in addition to the titanium oxide and the binder. The purpose of the addition of the activator is to suppress the generation of a gap that causes the water-repellent property between the fluororesin powders to deteriorate over time. The purpose is not to obtain the cleaning action, and no specific disclosure is made.

JP-A-11-138015, JP-A-11-138015
JP-A-140432, JP-A-11-123334, JP-A-11-1288751, and JP-A-11-123333 disclose, as a photocatalytic hydrophilic composition, a photocatalytic metal oxide fine particle and colloidal silica on a substrate surface. There is disclosed a technique of adding a surfactant or a wetting agent for the purpose of making the surface hydrophilic, but this is not a cleaning agent. Moreover, the colloidal silica used is not a binder but a hydrophilicity-imparting agent, and the binder performance is low.
Also, JP-A-11-114429 and JP-A-11-15
No. 6214, JP-A-11-156206, JP-A-11-156206
JP-A-1156205 discloses a technique similar to these, but also aims at pre-treatment for forming a photocatalytic film instead of cleaning. Even if there is a substantial cleaning action, it is specified that the pretreatment and the formation of the antifouling thin film by the photocatalyst are performed in two steps.
Although it takes time and effort, cleaning is easy and the cleaning time is shortened, but it is hardly accepted by consumers.

[0005]

SUMMARY OF THE INVENTION According to the present invention, antifouling, and / or deodorizing, and / or antifungal treatment can be carried out in a variety of situations by simply performing a simple cleaning with one cleaning agent.
An object of the present invention is to provide a cleaning agent capable of reducing the number of times of cleaning and a cleaning method using the same.

[0006]

Means for Solving the Problems The present inventors have developed a surfactant as a cleaning substrate, and an antifouling and / or odor preventing and / or
Alternatively, it has been found that the above problem can be solved by using a photocatalyst as a mold-proof substrate and further a cleaning agent containing a thin film-forming component, thereby completing the present invention. That is, according to the present invention, there is provided a detergent characterized by containing a surfactant and a photocatalyst. Further, according to the present invention, there is provided a cleaning method, wherein the cleaning agent is attached to the surface of the body to be cleaned in a liquid state.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The cleaning agent of the present invention contains a surfactant as a cleaning substrate and a photocatalyst as an antifouling and / or deodorizing and / or antifungal substrate. In the cleaning agent of the present invention, a surfactant used as a cleaning substrate is
(I) a nonionic surfactant, (ii) an amphoteric surfactant,
A mixture of at least one selected from (iii) a cationic surfactant and (iv) an anionic surfactant as long as the function and stability of the detergent is not impaired. It is desirable to select appropriately according to various base materials. A nonionic surfactant; and / or
Alternatively, it is more desirable to use an amphoteric surfactant and / or a cationic surfactant as a main surfactant.

Examples of the nonionic surfactant include polyoxyethylene alkylphenyl ether, polyoxypropylene alkylphenyl ether, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkyl ester, polyoxypropylene alkyl ester, Polyethylene glycol alkyl ester, polypropylene glycol alkyl ester, alkylamine polyethylene glycol ether, alkylamine polypropylene glycol ether, alkyldiamine polyethylene glycol ether, alkyldiamine polypropylene glycol ether, alkylamide polyethylene glycol ether,
Alkyl amide polyprolene glycol ether, alkyl amine oxide, alkyl amide amine oxide,
Polyethylene glycol, polypropylene glycol,
Examples thereof include glycerin, sorbitol, pentaerythritol, trimethylolpropane, fluoroalkyl group-containing ethylene oxide adduct, fluoroalkyl group-containing propylene oxide adduct, organopolysiloxane ethylene oxide adduct, and organopolysiloxane propylene oxide adduct. Although it contains an alkyl moiety, the alkyl moiety has 6 to 22 carbon atoms.

Examples of the amphoteric surfactant include imidazolinium betaine type, amidopropyl betaine type, glycine type and alanine type.

Examples of the cationic surfactant include tetramethylammonium salt, tetraethylammonium salt, tetrabutylammonium salt, alkyltrimethylammonium salt, dialkyldimethylammonium salt, trialkylmethylammonium salt, trimethylphenylammonium salt and triethylphenylammonium salt. , Tributylphenylammonium salt, alkyldimethylbenzylammonium salt, alkyldiethylbenzylammonium salt, alkyldibutylbenzylammonium salt,
Benzyl trimethyl ammonium salt, benzyl triethyl ammonium salt, benzyl tributyl ammonium salt, dialkanol polyethylene glycol ether alkyl methyl ammonium salt, dipolypropylene glycol alkanol ether alkyl methyl ammonium salt, alkyl amine salt, alkanol amine salt, polyethylene glycol alkanol ether amine salt, And polypropylene glycol alkanol ether amine salts. Although it contains an alkyl moiety, the alkyl moiety has 6 to 22 carbon atoms.

Examples of the anionic surfactant include alkyl benzene sulfonate, alkyl sulfate, alkyl ether sulfonate, alkyl phenyl ether sulfonate, methyl taurate, alaninate, and the like.
Sulfosuccinate, alkyl ether sulfonate, alkyl amide sulfate, alkanol nitrate, carboxylate nitrate, alkanol phosphate, fluoroalkyl group-containing sulfonate, fluoroalkyl group-containing carboxylate, organopolysiloxane-containing sulfone And carboxylates containing organopolysiloxane. Although it contains an alkyl moiety, the alkyl moiety has 6 to 22 carbon atoms.

These surfactants also function as a dispersion stabilizer for the photocatalyst particles contained in the cleaning agent of the present invention and the thin film forming components contained in some cases.

In the cleaning agent of the present invention, the photocatalyst used as the antifouling and / or deodorizing and / or antifungal base material is such that when irradiated with ultraviolet and / or visible light, electrons are excited and holes are emitted. Which decompose contaminants mainly composed of organic substances, thereby exhibiting antifouling, and / or deodorizing, and / or antifungal functions. The photocatalyst used in the present invention may be of any type as long as it has a function of decomposing the above contaminants under the condition that ultraviolet light and / or visible light is normally irradiated.
Specific examples of the photocatalyst include semiconductors such as metal oxides, metal sulfides, metal composite oxides, metal selenides, and metal tellurides, such as titanium oxide, tungsten oxide, bismuth oxide, zinc sulfide, indium oxide, and sulfide. Cadmium, molybdenum sulfide, cadmium telluride, cadmium selenide, strontium titanate, lanthanum potassium titanate, sodium tantalate, strontium tantalate, bismuth vanadate, potassium niobate, lead hydrogen niobate, and the like. It is preferable to use a highly functional material such as a material having a metal supported thereon, a metal ion-doped material and an oxygen deficient material.
In order not to impair the appearance of the object to be cleaned when attached to the object to be cleaned, the average particle size is preferably 200 nm or less, more preferably 150 nm or less. The lower limit of the average particle size is not particularly limited, but is usually about 2 nm.

When the detergent used in the present invention is used in ordinary households, it is necessary to pay particular attention to safety. The photocatalytic redox effect of the photocatalyst is considered to have little effect on the stratum corneum on the skin surface unless it is intentionally applied for a long time, such as in the case of sunscreen, etc. Desirably, it exists in the pores of the porous body. This also reduces the direct decomposition of the object to be cleaned and the components forming the thin film, etc., increases the efficiency of the photo-oxidation-reduction reaction, and maintains the antifouling and / or deodorizing and / or antifungal function. You can extend the period you can do.

As the inorganic porous material, phyllosilicate,
Examples include layered compounds such as smectite, zeolite, and porous silica. In the inorganic porous material, the average pore diameter is usually 1 to 1000 °, preferably 5 to 500 °.
It is. The average particle size of the inorganic porous body is usually 0.0
It is 1 to 30 μm, preferably 0.03 to 10 μm.
As a method for supporting the photocatalyst in the pores of the inorganic porous material, there is a method in which photocatalyst particles are added to an aqueous slurry liquid of the inorganic porous material in the presence of a surfactant, followed by stirring.
As a specific example of such a method, see, for example,
JP-A-768835 can be used. The amount of the photocatalyst contained in the inorganic porous material is usually 0.1% by weight.
It is from 01 to 70%, preferably from 0.02 to 50%.

The cleaning agent of the present invention further contains a thin film-forming component, thereby improving the adhesion of the photocatalyst to the object to be cleaned and maintaining the antifouling and / or deodorizing and / or antifungal properties. The period can be extended. In order for the photocatalyst to effectively act as an antifouling and / or deodorizing and / or antifungal base material and to maintain the adhesion of the photocatalyst to the object to be cleaned for a long period of time, the thin film forming component itself must be It needs to be hardly decomposed by a photocatalyst.

The thin-film forming components that are hardly decomposed include
And silicones and modified silicones. So
As a specific example of the polyoxyl terminal,
Luylene-modified silicone, both terminal and / or side chain cal
Boxyl-modified silicone, both terminal and / or side chain amino
Modified silicone, both terminal and / or side chain alcohol modified
Silicone and the like. Next, the fluorine-containing polymer
Is raised. As a specific example, vinyl fluoride (C
H_TwoＣＨCHF), vinylidene fluoride (CH_Two= CF _Two),
Ethylene difluoride (CHF = CHF), ethylene trifluoride
(CHF = CF_Two), Ethylene tetrafluoride (CF_Two= CF
_Two) And / or acrylic acid
Fluoroalkyl ester, methacrylic acid fluoroal
Acrylic acid, alkyl acrylate
Stele, polyoxyalkylene acrylate,
Ammonium acrylate, dimethyl acrylate polysiloxy
Sun ester, methacrylic acid, methacrylic acid ester,
Polyoxyalkylene methacrylate, methacrylic acid
Ammonium acrylate, dimethyl methacrylate polysiloxa
Silicone ester such as styrene ester, styrene, male
Acid, ethylene, propylene, and other olefins
And a copolymer of

The detergent of the present invention is used in the form of powder or liquid (dispersed liquid). When the cleaning agent of the present invention is used in a liquid state, the dispersion medium may be water, an organic solvent, a water / organic solvent mixture, or the like. In the cleaning agent of the present invention, the usage ratio of the photocatalyst is, per 100 parts by weight of the surfactant,
The proportion is 0.1 to 200 parts by weight, preferably 1 to 100 parts by weight.

When the surface of the photocatalyst and / or the surface of the object to be cleaned is hydrophilic, the component for forming a thin film preferably contains a hydrophilic group, and more preferably, a part of the hydrophilic group is a polyoxyalkylene group. It is. When water is not used as the main solvent and / or dispersion medium, the thin film-forming component used in the cleaning agent of the present invention may contain a precursor substance that forms a three-dimensional structure by condensing after being attached to the object to be cleaned. Good. Specific examples include a 1-4-functional alkoxysilane and its hydrolytic condensate, a 1-4-functional alkoxytitanium and its hydrolytic condensate, and the like. The ratio of the film-forming component is 0.1 to 300 parts by weight, preferably 0.2 to 200 parts by weight, per 100 parts by weight of the photocatalyst. Further, it is desirable that the thin film-forming component and other components of the cleaning agent of the present invention have a function of maintaining the dispersion stability of the photocatalyst similarly to the surfactant.

The detergent of the present invention may contain an alkaline component when it is desired to enhance the detergency as a detergent for oil stains around a range. However, when an alkali metal compound such as sodium hydroxide or potassium hydroxide is used, amines are preferred because they remain in the thin film and hinder the photocatalytic function. When the alkaline component is an amine, most of the amine is decomposed by the photocatalyst, even if a small amount remains after the washing operation. Examples of the amines include alkylamines, amidoamines, and alkanolamines.

The cleaning agent of the present invention may contain a solvent and water as a dispersion medium and / or other volatile liquids and / or liquefied gas in addition to the above-mentioned components. As the volatile liquid, the carbon number of methanol, ethanol, propanol, butanol and the like is 1 to 6, preferably 1 to 6.
Alcohols having 4 to 5 carbon atoms, preferably 5 to 1
Examples of the liquefied gas include hydrocarbons having 0 to 3 carbon atoms and ketones having 3 to 7 carbon atoms, preferably 3 to 5 carbon atoms such as acetone and methyl ethyl ketone, and hydrocarbons having 1 to 4 carbon atoms and carbon dioxide gas.

Next, the method of using the cleaning agent of the present invention will be described. In the present invention, the photocatalyst is coated on the surface of the object to be cleaned by simply performing the operation of cleaning the surface of the object to be cleaned in various use scenes with one cleaning agent, whereby the photocatalytic antifouling and / or Alternatively, it is characterized by imparting an anti-odor and / or anti-fungal function. The method for attaching the cleaning agent of the present invention to the surface of the object to be cleaned is not particularly limited, but a simple method such as spray with a trigger, foam spray, or atomized spray is desirable. When a volatile liquid and / or a liquefied gas is used as a main solvent and a dispersion medium, an aerosol or the like is preferable.

The method of using the cleaning agent of the present invention is not particularly limited. However, according to the surface of the object to be cleaned, the cleaning agent is adhered to the surface of the object to be cleaned and left for a certain period of time to remove dirt. Separation from the surface and formation of a thin film containing a photocatalyst, followed by a method of wiping cleaning components, dirt, and excess photocatalyst and thin film-forming components. Is separated from the surface of the object to be cleaned and a thin film containing a photocatalyst is formed, and thereafter, a cleaning component, dirt, a method of wiping off excess photocatalyst and a thin film-forming component, and a cleaning agent adhered to the surface of the object to be cleaned and rubbed. By taking this, a thin film containing a photocatalyst is formed, and a method for removing a cleaning component, dirt, and excess photocatalyst and a thin film forming component is appropriately selected and performed.

[0024]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. The parts shown below are parts by weight.

Example 1 An aqueous dispersion of a photocatalyst (titanium oxide ST-01 manufactured by Ishihara Sangyo Co., Ltd.) stabilized in a finely dispersed state with a nonionic surfactant (surfactant content 1%, photocatalyst solid content 5) %) 60 parts,
Side-chain polyoxyalkylene-modified organopolysiloxane (SH-377 manufactured by Toray Dow Corning Silicone Co., Ltd.)
25 parts of an aqueous solution (solid content: 20%) of 1), 0.5 parts of lauryl dimethylamine oxide, 2 parts of N-butylethanolamine, 10 parts of diethylene glycol monobutyl ether
And 2.5 parts of water were mixed and stirred, and 5 g of the mixture was sprayed on a stainless steel plate (100 mm × 100 mm, heated 5 mg of salad oil mist almost uniformly adhered, and allowed to stand at room temperature for 30 days) with trigger spray. After 5 minutes, wiping was performed with a sponge (the wiping operation was performed only once), and further wiping with a cotton cloth (the wiping operation was performed only once), and the surface state was observed. Thereafter, a fluorescent lamp was installed so that ultraviolet rays (intensity 0.005 mW / cm ² ) were applied to the surface of the stainless steel plate, and about 0.1 mg of salad oil mist was adhered per day. Observed.

Example 2 25 parts of the aqueous solution (solid content: 20%) of the side chain polyoxyalkylene-modified organopolysiloxane in Example 1 was mixed with an aqueous solution of a copolymer of polyoxyethylene methacrylate and methyl methacrylate (solid content: 20%). %) The same operation as in Example 1 was performed instead of 25 parts.

Example 3 25 parts of an aqueous solution (solid content: 20%) of the side chain polyoxyalkylene-modified organopolysiloxane in Example 1 and 22.5 parts of water were mixed with colloidal silica (Catalyst Chemical Industry Co., Ltd.)
The same operation as in Example 1 was performed, except that 12.5 parts of Cataloid S1-40 / 40 wt% (manufactured by Cataloid) and 15 parts of water were used.

Comparative Example 1 The same operation as in Example 1 was performed, except that the aqueous photocatalyst dispersion stabilized in a finely dispersed state with the nonionic surfactant in Example 1 was changed to water.

Table 1 shows the results of the above experiments.

[Table 1] ◎: Dirt could not be confirmed ○: Oil dirt could not be confirmed, but slight yellow part was confirmed △: Light oil dirt was confirmed ×: Oil dirt was confirmed

From Table 1, it can be seen that Examples 1 to 3 containing a surfactant and a photocatalyst have a washing function from the appearance after the washing operation, and are clearly more soiled than the blank in the appearance after 30 days. Therefore, Comparative Example 1, which does not contain a photocatalyst, has a cleaning function but does not have an antifouling function because of a low antifouling function. Example 1
In Examples 3 to 3, the antifouling function of Example 1 containing a thin film forming component that is not easily affected by the photocatalytic decomposition action is the highest, and Example 2 that contains a thin film forming component that is subjected to the photocatalytic decomposition action, and the binder function are the same. Example 3, which contained low colloidal silica, resulted in somewhat poor results.

Example 4 An aqueous dispersion of a photocatalyst (titanium oxide ST-01 manufactured by Ishihara Sangyo Co., Ltd.) stabilized in a finely dispersed state with a nonionic surfactant (surfactant content 1%, photocatalyst solid content 5) %) 60 parts,
Side-chain polyoxyalkylene-modified organopolysiloxane (SH-377 manufactured by Toray Dow Corning Silicone Co., Ltd.)
25 parts of the aqueous solution (solid content 20%) of 1), 5 parts of polyoxyethylene lauryl ether, 5 parts of ethylene glycol monoethyl ether, and 5 parts of stearyltrimethylammonium chloride are arranged in a tile plate (9 squares of 30 mm square) in a square. Fill the gaps as joints and place them in the lower part of the bathroom for 30 stitches, so that dirt such as dirt adheres to the tiles and black molds are generated at the joints). After that, the surface was rubbed with a sponge (the rubbing operation was performed five times), washed with water and dried, and the surface condition was observed. Thereafter, a fluorescent lamp was installed so that ultraviolet light (intensity: 0.005 mW / cm ² ) was applied to the tile plate surface, and the fluorescent lamp was placed in the lower part of the bathroom, and the surface condition after 30 days was observed.

Comparative Example 2 The same operation as in Example 4 was performed except that the aqueous photocatalyst dispersion stabilized in a finely dispersed state with the nonionic surfactant in Example 4 was changed to water.

Table 2 shows the results of the above experiments.

[Table 2] Dirt on tiles ◎: Dirt could not be confirmed △: Dirt was partially confirmed ×: Dirt was confirmed on the whole Joint mold ◎: No black mold ×: Black mold was generated

From Table 2, it can be seen that Example 4, which contains a surfactant and a photocatalyst, has a cleaning function from the appearance after the washing operation, and that the appearance after 30 days is clearly less stained than the blank. This indicates that Comparative Example 2, which also has antifouling and antifungal functions but does not contain a photocatalyst, has a cleaning function but no antifouling and antifungal functions.

Example 5 Porous silicate stabilized in a finely dispersed state with a nonionic surfactant (photocatalytic titanium oxide 10% complexed inside)
30 parts of an aqueous dispersion (content of surfactant: 3%, porous silicate solid content: 10%), ammonium acrylate,
An aqueous solution of a copolymer of methyl methacrylate, styrene, and polyoxyethylene methacrylate (solid content: 20
%) 30 parts, dipropylene glycol monomethyl ether 20 parts, tridecanol polyoxyethylene 10 mol adduct 10 parts, sodium metasilicate sodium 9 hydrate 5 parts, and potassium pyrophosphate 5 parts were mixed and stirred, and 5 g was mixed with vinyl. Floor tile (100 mm x 100 mm, 3
It was sprayed with a sponge after 5 minutes, wiped with a sponge (five times of wiping operation), and wiped dry with a cotton cloth (three times of empty wiping operation) to observe the surface condition. Thereafter, a fluorescent lamp was installed so that ultraviolet light (intensity 0.005 mW / cm ² ) was applied to the surface of the vinyl floor tile, the fluorescent lamp was placed on the floor, and the surface condition after 30 eyes was observed.

Comparative Example 3 The aqueous dispersion of the porous silicate (containing 10% of photocatalytic titanium oxide complexed inside) stabilized in a finely dispersed state with the nonionic surfactant in Example 5 was changed to water. The same operation as in Example 5 was performed.

Table 3 shows the results of the above experiments.

[Table 3] ◎: Dirt could not be confirmed ○: Slight dirt x: Dirt present

From Table 3, it can be seen that Example 5, which contains a surfactant and a photocatalyst, has a washing function from the appearance after the washing operation, and has less soiling than the blank in the appearance after 30 days. Comparative Example 3, which also has an antifouling function but does not contain a photocatalyst, has a cleaning function but no antifouling function.

Example 6 An aqueous dispersion of a photocatalyst (titanium oxide ST-01 manufactured by Ishihara Sangyo Co., Ltd.) stabilized in a finely dispersed state with a nonionic surfactant (surfactant content 1%, photocatalyst solid content 5) %) 40 parts,
Side-chain polyoxyalkylene-modified organopolysiloxane (SH-377 manufactured by Toray Dow Corning Silicone Co., Ltd.)
20 parts of an aqueous solution of 1) (solid content: 20%), 15 parts of tridecanol polyoxyethylene 10 mol adduct, sodium alkyldiphenyl ether disulfonate (solid content: 30%)
%), 10 parts of citric acid, and 10 parts of maleic acid were mixed and stirred, and 5 g of the mixture was stirred into a tile plate (100 mm × 100 m).
sprayed on a vertical wall (1m above ground) on the north side for 30 days with a trigger spray, rubbed with a sponge after 5 minutes (rubbing operation 5 times), drained with water, and dried Was observed. Thereafter, the tiles were placed on the vertical wall on the north side again (at a height of 1 m above the ground), and the surface condition was observed 30 days later.

Comparative Example 4 The same operation as in Example 1 was carried out except that the aqueous photocatalyst dispersion stabilized in a finely dispersed state with the nonionic surfactant in Example 6 was changed to water.

Table 4 shows the results of the above experiments.

[Table 4] ◎: Dirt could not be confirmed ○: Slight dirt x: Dirt present

From Table 4, it can be seen that Example 6, which contains a surfactant and a photocatalyst, has a washing function from the appearance after the washing operation, and has less soiling than the blank in the appearance after 30 days. Comparative Example 4, which also has an antifouling function but does not contain a photocatalyst, has a cleaning function but no antifouling function.

Example 7 Porous silicate stabilized in a finely dispersed state with a nonionic surfactant (photocatalytic titanium oxide 10% complexed inside)
30 parts of an aqueous dispersion (content of surfactant: 3%, solid content of porous silicate: 10%), side chain polyoxyalkylene-modified organopolysiloxane (SH-3771 manufactured by Toray Dow Corning Silicone Co., Ltd.) Aqueous solution (solid content 2.
0%) 20 parts, lauryl alcohol 5 parts, distearyl dimethyl ammonium chloride 5 parts, ammonium tripolyphosphate 15 parts, polyethylene glycol 5 parts, tridecanol polyoxyethylene 10 mol adduct 20 parts 30 g were mixed and stirred, Put in a washing machine (water volume 30L, wash 20 minutes, rinse 20 minutes x 2 times), polyester cloth (30 days, put in space with cigarette smell)
Was washed and subjected to a sensory evaluation on odor and texture. After that, UV light (strength 0.005 mW / c) was applied to the polyester cloth.
m ² ), a fluorescent lamp was set up, and it was placed in a space with a cigarette smell for 30 days, and a sensory evaluation was performed on the odor and texture.

Comparative Example 5 An aqueous dispersion of a porous silicate (containing 10% of a photocatalyst titanium oxide compounded inside) stabilized in a finely dispersed state with a nonionic surfactant in Example 7 was changed to water. The same operation as in Example 7 was performed.

Table 5 shows the results of the above experiments.

[Table 5] Odor ◎: No odor ○: Slight tobacco odor ×: Strong tobacco odor Texture ○: Good ×: Poor

From Table 5, it can be seen from the sensory evaluation after washing that Example 7 containing a surfactant and a photocatalyst has the function of being able to wash without impairing the texture of the fabric. In the evaluation, since the odor is clearly smaller than that of the blank, it also has a deodorizing function and does not impair the texture of the fabric. Comparative Example 5, which does not contain a photocatalyst, has a cleaning function but has a deodorizing function. It turns out that there is no function.

[0047]

As described above, the cleaning agent of the present invention forms a photocatalytic thin film simply by performing a cleaning operation, and has an antifouling and / or deodorizing and / or antifungal function using ordinary light. Be demonstrated.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akiyuki Uno 1-3-7 Honjo, Sumida-ku, Tokyo Inside Lion Corporation (72) Inventor Nobuyuki Yamamoto 1-3-7, Honjo, Sumida-ku, Tokyo No. Lion Corporation F-term (Reference) 4G069 AA03 BA04A BA04B BA48A BB02A BB04A BB06A BB09A BC02A BC03A BC12A BC18A BC21A BC25A BC35A BC36A BC42A BC50A BC54A BC55A BC56A BC59A BC60A DA01A01CA01 DA10A BD01A EA27 EA28 EB14 EB37 ED02 ED29 FA02 FA15 FA27 FA33

Claims (5)

[Claims] 1. A cleaning agent comprising a surfactant and a photocatalyst. 2. The cleaning agent according to claim 1, further comprising a thin film forming component. 3. The method according to claim 1, wherein the surfactant is at least one selected from (i) a nonionic surfactant, (ii) an amphoteric surfactant and (iii) a cationic surfactant. The cleaning agent according to claim 1 or 2, wherein 4. The cleaning agent according to claim 1, wherein the photocatalyst is present in pores of the inorganic porous body. 5. A cleaning method, comprising applying the cleaning agent according to claim 1 to a surface of an object to be cleaned in a liquid state.