JP2963657B2 - Deposition treatment agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to paper products, cloth products,
The present invention relates to an adhesion treating agent that can exert excellent sterilizing power, deodorizing power and the like for a long period of time by applying an adhesive treatment to the surface of a base material such as a plastic product or a metal product.

[0002]

2. Description of the Related Art We coexist with various bacteria in a general living environment. Among them, it is desirable that bacteria harmful to the human body are always killed and a clean environment is maintained. Large in hospitals with
Of course, spraying a fungicide can ensure a certain effect, but for sterilization purposes, spraying the fungicide without restriction to the living environment is harmful to the human body and is not preferable. In the case of MRSA (mesicillin-resistant staphylococcus aureus), which causes the problem of hospital-acquired infection, since it is resistant to antibiotics, post-operative patients with poor immunity, the elderly, Mothers and children at birth are particularly worried. And this cannot be solved by merely spraying the fungicide. Therefore, after all, it is important to carefully repeat cleaning and washing as the most basic cleaning method. However, if a long-term caregiver is kept at home, it is difficult to ensure that it is thoroughly carried out, and professional staff is employed. Even in hospitals, thoroughness imposes a heavy economic burden, and that burden can be rebounded to users.

[0003]

In order to solve the above-mentioned problems, the present inventor has proposed a germicidal adsorption function in which a mixture containing an optical semiconductor ceramic and an adsorbent such as apatite is sprayed on a substrate. (Japanese Patent Laid-Open No. 6-25 / 1994)
No. 4139). This germicidal adsorption functional body is an extremely excellent technique in that it can exhibit excellent germicidal activity semipermanently and is harmless to the human body.

Accordingly, the present invention relates to Japanese Patent Application Laid-open No. Hei 6-254139.
By further developing and developing the technology described in
It is an object of the present invention to provide a treatment agent that can be used more easily while maintaining excellent sterilizing power equivalent to the above technology.

[0005]

According to the present invention, as a means for achieving the above object, a photocatalyst comprising a combination of an optical semiconductor powder and a metal powder and a photocatalyst of bacteria, odors, harmful substances and the like are treated. It is an object of the present invention to provide an adhering treatment agent as a printing ink containing an adsorbing material for adsorbing and holding an object, a colorant and a vehicle. Furthermore, the present invention provides, as another means for achieving the above object, a photocatalyst combining an optical semiconductor powder and a metal powder, a bacterium, an odor,
Adsorbs objects to be treated by photocatalysis such as harmful substances,
An object of the present invention is to provide an adhesion treating agent as a paint containing an adsorbent material for holding and at least a film forming component among the film forming component and the dispersant. Further, the present invention provides
As another means for achieving the above object, a photocatalyst combining an optical semiconductor powder and a metal powder, an adsorbent material for adsorbing and holding an object to be treated by photocatalysis such as bacteria, odor, harmful substances, and water And a dispersant such as an organic solvent. The optical semiconductor powder is made of TiO ₂ , CdS, CdSe, WO ₃ , Fe
₂ O ₃ , SrTiO ₃ , or KNbO ₃ , and the metal powder is any one of gold, silver, platinum, and copper.
It consists of a seed powder. Further, the adsorbing material is made of one or more materials selected from the group consisting of ceramic powders such as apatite, zeolite or sepiolite, activated carbon and silk fiber.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The photosemiconductor powder used in the deposition treatment agent of the present invention is called a photocatalyst in combination with a metal powder, and has a photocatalytic action upon light irradiation or depending on temperature. No, an electrochemical cell having one electrode made of a photo-semiconductor ceramic and the other electrode made of a metal acts chemically. Such optical semiconductor powders include TiO ₂ , CdS, CdSe, WO ₃ , Fe
Examples include ₂ O ₃ , SrTiO ₃ , and KNbO ₃ . In the present invention, the anatase is a ceramic in which oxidation and reduction are well-balanced, is chemically stable, is approved as a food additive, has no sanitary problems, is easily available and is inexpensive. preferred TiO ₂ having a crystal form. The particle size of these photosemiconductor powders is preferably 0.01 to 2.0 μm in consideration of a good surface workability and good workability of attachment,
In particular, 0.3 to 0.6 μm is preferable.

The metal powder used for the treatment agent of the present invention is:
One of the paired electrodes is formed as described above. As such a metal powder, various metal powders such as gold, silver, platinum, and copper can be used. Since metal powder as a photocatalyst requires moisture as one of the indispensable elements for the photocatalyst to exhibit its original function, it is necessary that the metal powder be stable without change over time in the presence of water. Therefore, among the above-mentioned metal powders, platinum is most preferable, but in consideration of economy, the metal powder further has the above characteristics,
Silver is preferred because it is non-toxic and itself has bactericidal properties. The particle size of these metal powders is preferably 0.05 to 0.1 μm in consideration of the relationship with the photosemiconductor powder as a photocatalyst. The mixing ratio of the optical semiconductor powder and the metal powder is preferably set at 10 or more in order to suitably exhibit sterilization, deodorization and the like.
The metal powder is preferably used in an amount of 1 to 55 parts by weight, more preferably 20 to 30 parts by weight, based on 0 parts by weight.

[0008] The adsorbing material used for the adhering agent of the present invention includes:
It absorbs and retains processing objects such as bacteria, viruses, molds, malodorous substances and harmful substances. As such an adsorbing material, one or more selected from the group consisting of ceramic powders such as apatite (apatite), zeolite or sepiolite, activated carbon and silk fiber-containing materials can be used, and if necessary, two or more selected from these. They can be used in combination. Here, as the apatite, hydroxyapatite [Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ] that selectively adsorbs proteins such as bacteria, viruses, and molds is preferable. Examples of the silk fiber-containing material include, in addition to the silk fiber powder, a granulated material, a gel material, and the like.
The particle size of these adsorbent materials (when the silk fiber content is a powder) is preferably 0.001 to 1.0 μm in consideration of a good surface area and good workability of attachment while securing a larger surface area.
Particularly, the thickness is preferably 0.01 to 0.05 μm. The mixing ratio of the optical semiconductor powder and the adsorbing material is preferably 1 to 50 parts by weight, more preferably 10 to 30 parts by weight, based on 100 parts by weight of the optical semiconductor powder in order to suitably exhibit sterilization, deodorization, and the like. Parts are preferred.

The adhesion treating agent of the present invention can be obtained by mixing the above-mentioned components, and carrying the photosemiconductor powder and the metal powder on an adsorbing material. Such an adhesion treating agent of the present invention can be used as it is, but can be used after being dispersed in a dispersant such as water or an organic solvent. At the time of its use, it can be adhered by directly applying it to the object to be treated, or it can be contained inside as a filler.

The present invention is directed to a printing ink or paint which is used in another form for the purpose of imparting an adherence to an object to be treated and further providing a decorative effect, etc., in place of the adhesion treating agent of such an embodiment. Can be

A printing ink according to another embodiment of the present invention includes:
It contains at least a colorant and a vehicle in addition to the optical semiconductor powder, the metal powder, and the adsorbing material, and further contains other components as necessary.

As the colorants, those generally used as colorants for printing inks, such as inorganic pigments and organic pigments,
Dyes such as oil-soluble dyes and disperse dyes can be used. Vehicles include oils, e.g., drying oils such as linseed oil, semi-drying oils such as soybean oil, non-drying oils such as castor oil; resins, e.g., rosin, modified rosin, natural resins such as gilsonite or the like. Natural resin derivatives, phenolic resins,
Alkyd resin, xylene resin, urea resin, melamine resin, polyamide resin, acrylic resin, epoxy resin, ketone resin, petroleum resin, vinyl chloride resin, polyvinyl acetate, urethane resin, chlorinated polypropylene, chlorinated rubber, cyclized rubber, Cellulose derivatives and reactive resins can be mentioned; in addition, plasticizers can be mentioned. Further, as other components, natural or synthetic wax components, desiccants, dispersants, wetting agents, crosslinking agents, gelling agents, thickeners, anti-skinning agents, stabilizers, matting agents,
Examples include an antifoaming agent, a color separation inhibitor, a photopolymerization initiator, and a fungicide. There is no particular mixing ratio of each of these components, and the same mixing ratio as that of a printing ink which is generally commercially available can be applied.

The total amount of the photosemiconductor powder, the metal powder and the adsorbing material in the printing ink is 3 to 55% by weight based on the total amount of the printing ink in order to exert effects such as sterilization and deodorization and to secure appropriate printability. Preferably, it is particularly preferably 15 to 35% by weight.

The form and type of such printing inks are not particularly limited, and may be paste inks, solvent inks, or solvent-free inks, which are lithographic printing inks, letterpress printing inks, gravure printing inks, screen printing inks, and the like. It can be applied as intaglio printing ink and special printing ink. Among these, to achieve the object of the present invention most effectively, screen ink for paper,
Screen printing inks, such as plastic screen inks, glass screen inks, and fabric screen inks, are preferred.

Next, a paint as still another embodiment of the present invention will be described. The paint contains at least a film-forming component and a dispersant in addition to the optical semiconductor powder, the metal powder, and the adsorbing material, and further contains other components as necessary.

The coating film forming components include cellulose derivatives, phthalic acid resins, phenolic resins, alkyd resins, aminoalkyd resins, acrylic resins, epoxy resins, urethane resins, vinyl chloride resins, silicone resins, fluororesins, emulsions, and water-soluble Synthetic resins such as resins can be used, and vegetable drying oils can also be used. Examples of the dispersant include petroleum solvents, aromatic solvents, alcohol solvents, ester solvents, ketone solvents, cellosolve solvents, water, and the like. When a powder coating is used, a solvent as a dispersant is not required. As other components, pigments, for example, inorganic pigments such as titanium dioxide, graphite, red iron oxide, chromium oxide, carbon black, etc., organic pigments such as Hansa Yellow, Nova Palm Orange, quinacridone violet, copper phthalocyanine, precipitated calcium carbonate And special functional pigments represented by anticorrosive pigments such as zinc chromate, strontium chromate, zinc phosphate and aluminum phosphate. Further, in addition to the above components,
As auxiliary materials, desiccants and polymerization catalysts for the purpose of imparting film drying acceleration properties; wetting agents, pigment dispersants, flooding inhibitors, pigment settling inhibitors for the purpose of improving pigment dispersibility; Thickener, thixotropic agent, anti-sagging agent for the purpose of adjusting the surface; leveling agent, defoamer, anti-repellent, anti-floating agent, plasticizer, anti-skinning agent for the purpose of adjusting the coated surface , An electrostatic coating aid, an anti-scratching agent, an anti-blocking agent, an ultraviolet ray inhibitor, an anti-staining agent, a preservative, a fungicide, and the like. There is no special mixing ratio of these components, and the same mixing ratio as that of a commercially available paint can be applied.

The total amount of the optical semiconductor powder, the metal powder and the adsorbing material in the paint is 3 to 55% of the total amount of the paint in order to exert effects such as sterilization and deodorization and to secure appropriate paintability.
% By weight, and particularly preferably 15 to 35% by weight.

The method of applying such a paint is not particularly limited, and may include brush coating, air spray coating, airless spray coating, electrostatic coating, powder coating, electrodeposition coating, curtain flow coating, roll coating and the like. The method can be applied.

In the treatment agent of the present invention, bacteria, viruses, molds, malodorous substances, harmful substances and the like are first adsorbed and held by an adsorbing material, and thereafter or simultaneously, the light semiconductor and the metal are irradiated with light. Photocatalysis by the powder (see FIG. 1) kills bacteria, viruses, molds and the like, and decomposes them in the case of malodorous substances. Furthermore, even in the case of those that are not adsorbed, by photocatalysis,
A growth prevention and repellent effect can be obtained. In addition, the deposition treatment agent of the present invention can perform the same photocatalytic action as when it is irradiated with light in a general living temperature range expected on the earth even when it is not irradiated with light at all ( (See FIG. 2). Further, proteins constituting bacteria, viruses, molds and the like adsorbed on the adsorbent material are decomposed and disappear, so that the above effects are maintained semipermanently without being attenuated with time. FIG. 1 shows a change in resistance value of the photocatalyst due to a change in illuminance, and FIG. 2 shows a change in resistance value of the photocatalyst due to a change in temperature. The adhesion area of the treatment agent of the present invention in the object to be treated is not particularly limited and varies depending on the application, but is usually 20% or more, preferably 40 to 40% of the total surface area of the object to be treated. The effect described above can be obtained by applying the coating so as to be 60%. Further, at the time of the applying treatment, for example, a method of applying the applying agent to the processing surface in a state where the applying agent is uniformly dispersed like a lattice pattern or a polka dot pattern may be applied. Is preferred because it can reduce the amount of used and can exert uniform and effective adsorption and photocatalysis.

Bacteria, molds, and the like grow under high-temperature and high-humidity conditions, and the photocatalyst in the coating agent of the present invention exhibits a particularly effective function under such high-temperature and high-humidity conditions. To demonstrate. Therefore, considering that the germicidal component in the deposition treatment agent of the present invention is a non-eluting material, the deposition treatment agent of the present invention is a technology for killing and suppressing the growth of organisms including bacteria and mold. , Which can be applied to an extremely wide range. The printing ink of the present invention, the coating treatment agent containing aspects such as paints, in various shapes,
Sterilization, deodorization, and the like can be imparted by applying the composition to an object to be treated made of various materials such as paper, wood, cloth, plastic, metal, and concrete. Also,
Since a decorative effect by printing a desired pattern or image can also be provided, it can be used for various applications that require them, and can also be used for applications where light irradiation cannot be expected. . For example, by being adhered to paper, it can be used as wrapping paper for preserving various foods, wrapping materials such as wrapping bags, wallpaper, shoji, sliding doors, lining materials for furniture, and other housing materials. Can also be used by incorporating them into paper raw materials as sizing agents; clothing (masks),
Curtains, bedding in general (sheets, duvet covers, blanket covers, pillowcases, etc.), various covers (various chair covers, cushion covers, etc.), tablecloths, carpets, towels, handkerchiefs, etc. It can be used; it can be used as a material for air purification filters or water purification filters. In addition, for painting buildings and structures, for painting various products,
It can also be used as an antifouling paint for preventing the attachment of aquatic organisms such as barnacles, serplas and mussels on ships, bridges and piers. It can also be used for preventing the generation of algae in water.

[0021]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Example 1 First, 10 parts by weight of silver powder (particle size: 0.1 to 0.8 μm) and hydroxyapatite (particle size: 100 parts by weight of TiO ₂ (particle size: 0.1 to 1.0 μm) 0.05-0.8
μm) A mixed powder obtained by mixing 10 parts by weight was prepared. Next, 2 g of an inorganic pigment and 998 g of a urethane resin as a vehicle were kneaded with a mixer using the mixed powder. The mixing ratio of the mixed powder in the total amount of the ink was 10% by weight. The kneaded material was filled in a container by a filling machine to obtain a screen ink for fabric.

Test Example 1 Using the fabric screen ink obtained in Example 1, MRS
AA, MRSA-B and a bactericidal test against Pseudomonas aeruginosa were performed by the following method. (1) Test cloth Example cloth: The cloth screen ink obtained in Example 1 was applied to the entire surface on one side of the protein non-woven fabric so as to have a thickness of about 5 μm to obtain an example cloth. Control cloth: An untreated acrylic nonwoven fabric was used as a control cloth (the bactericidal action of the acrylic nonwoven fabric was not reported). (2) Test bacteria MRSA-A (7.8 × 10 ¹⁰ / ml), MRSA-B
(7.3 × 10 ⁷ / ml) and Pseudomonas aeruginosa (3.8 × 10 ⁹ / ml).
ml) was used. (3) Test method A total of seven circles (diameter 4.8 mm) were drawn with non-sterile ink on the surfaces of two Example cloths and two control cloths. , 20 minutes, 1 hour, 3 hours, 6 hours, and 24 hours. Next, 0.2 ml of a bacterial solution of MRSA-A, MRSA-B or Pseudomonas aeruginosa was applied to the inside of each circle of each cloth, spread evenly with a fub, and left in the laboratory. The fluff was sterilized by dry heat, and each cloth was sterilized by ultraviolet light for 24 hours in advance. Next, after a lapse of a predetermined time, the inside of a circle corresponding to each cloth was carefully wiped five times with a swab to collect bacteria, and the collected bacteria were placed in a test tube into which 3 ml of sterile broth had been injected. Then continuously dilute the bacterial suspension to 10 to 10 ⁵ times. Next, 1 ml was taken from each diluted bacterial solution and transferred to ten different Petri dishes. After that, add normal agar medium to each dish and stir to make it uniform,
After culturing at 35 ° C. for 48 hours, the number of bacteria was counted. The count of the number of bacteria was selected from four petri dishes at a dilution ratio that was easy to count, and the average value was obtained. Table 1 shows the results.

[0024]

[Table 1]

As is clear from the results shown in Table 1, when the coating agent was a printing ink, it exhibited an excellent bactericidal effect against MRSA and Pseudomonas aeruginosa. Since this test was performed in a laboratory and no special light irradiation was performed, it was recognized that this bactericidal effect was manifested by both light and temperature factors, particularly temperature factors, as shown in FIGS. Can be
Therefore, if this printing ink is applied to a medical device, the medical device can be kept clean at all times and can prevent hospital infection.

[0026]

According to the present invention, the treatment agent adheres semipermanently without deteriorating excellent sterilizing and deodorizing effects due to the adsorbing action of the adsorbing material and the photocatalytic action of the photosemiconductor powder and the metal powder. be able to. Further, these effects can be sufficiently exerted even when there is no light irradiation. Further, the deposition treatment agent of the present invention can be used in a wide range of fields because the deposition treatment method is simple.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a change in illuminance and a resistance value of a photocatalyst (TiO ₂ and Ag powder).

FIG. 2 is a diagram showing a relationship between a temperature change and a resistance value of a photocatalyst (TiO ₂ and Ag powder).

Continuation of the front page (51) Int.Cl. ⁶ identification code FI C09D 11/02 C09D 11/02 (58) Investigated field (Int.Cl. ⁶ , DB name) C09K 3/00 A61L 2/16 B01J 35 / 02

Claims (5)

(57) [Claims] 1. A photocatalyst in which an optical semiconductor powder and a metal powder are combined, and an adsorbent material for adsorbing and holding an object to be treated by photocatalysis such as bacteria, odors, and harmful substances;
An adhesion treating agent as a printing ink containing a colorant and a vehicle. 2. A photocatalyst in which an optical semiconductor powder and a metal powder are combined, and an adsorbent material for adsorbing and holding an object to be treated by photocatalysis such as bacteria, odors, and harmful substances;
An adhesion treating agent as a paint containing at least a film-forming component among the film-forming component and the dispersant. 3. A photocatalyst comprising a combination of an optical semiconductor powder and a metal powder, an adsorbent material for adsorbing and holding an object to be treated by photocatalysis such as bacteria, odors, and harmful substances;
An adhesion treating agent containing a dispersant such as water or an organic solvent. 4. The photo-semiconductor powder comprises TiO ₂ , CdS,
CdSe, WO ₃ , Fe ₂ O ₃ , SrTiO ₃ , KNbO ₃
Wherein the metal powder is gold,
The coating agent according to any one of claims 1 to 3, comprising a powder of any one of silver, platinum, and copper. 5. The adsorbing material according to claim 1, wherein the adsorbing material is at least one selected from the group consisting of ceramic powders such as apatite, zeolite or sepiolite, activated carbon and silk fiber. Deposition treatment agent.