JP2013173903A - Invention related to complex type interior paint having charge transfer type redox-catalyst as base and photocatalyst titanium oxide and anti-bacterial/deodoring component and the like blended therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paint in an optimal blending ratio to exhibit its function of providing not only beauty regeneration for an indoor cloth, but also an additional value of providing a clean living environment of antibacterium, deodoring, mildew resistance and the like, by adding a photocatalyst titan oxide, a charge transfer type redox-catalyst, a deodoring component and an anti-bacterial fungiproof component.SOLUTION: In a complex type interior paint, an interior paint is combined with a charge transfer type catalyst exhibiting a persistent anti-bacterial deodorizing action even in a place with no light. The interior paint is constituted of: an inorganic component containing rutile type titanium oxide as a principal component, and containing additionally thereto extender pigments such as calcium carbonate, talc, an argillaceous mineral, silica and the like, as filler elements; a resin varnish which is a principal component of a coating film; a solvent; a surfactant; and the like.

Description

This proposal is not only for aesthetic regeneration applied to the cloth surface used for indoor remodeling, but also for charge transfer type redox catalyst (Patent Nos. 3514702 and 4024251: a non-photocatalyst that works with temperature difference) , Manufactured by Phylak Co., Ltd., hereinafter referred to as CT catalyst) and photocatalytic titanium oxide (hereinafter referred to as photocatalyst), it can dissolve substances such as acetaldehyde and ammonia, and also develop bacteria and fungi due to antibacterial components. The present invention relates to a paint that can provide an added value of providing a comfortable environment having both an inhibitory function and an antibacterial function. In addition, the clear type paint (referred to as Doctor Cloth C) of the proposed plan also uses the cloth pattern and texture in the new cloth of the newly constructed property, and also eliminates the smell smell, suppresses the growth of bacteria and mold, and has an antibacterial effect. It is also a product that can be used to differentiate newly built properties by providing added value. In addition, it is a paint with a wide range of uses for improving the environment, such as antibacterial and deodorizing in living spaces for elderly facilities and hospitals, and in public transportation vehicles.

Coupled with the recent renovation boom, properties that baby boomers built in their 20s and 30s are now in a period to renovate. Examples of the interior remodeling method include aesthetic regeneration techniques such as wall and ceiling cloth replacement, cloth cleaning, and cloth coloring.

Re-clothing is excellent in terms of aesthetic regeneration, but it takes time and effort to peel off the old cloth, and waste disposal such as processing of the peeled cloth is also necessary, which is expensive. There are also concerns about the environmental problems of non-combustible cloth. In addition, the cleaning of the cloth has a merit that it is cheaper and requires less construction time than the replacement of the cloth, but has the disadvantage that the aesthetic effect does not last as long as the left.

When coloring a cloth with a common organic paint, it may penetrate the cloth and cause adhesion to the wallboard, resulting in a thick coating and a loss of texture on the cloth. It was. There are products that can mix deodorant components and decompose acetaldehyde by adsorptive in cloth coating as well, but the durability is expected to be shortened as the adsorption capacity decreases.

Therefore, in addition to the desired aesthetic reproduction by color variations at the time of remodeling, development of a paint that can provide added value such as deodorization and antibacterial by a simple method of painting has been awaited. In addition, if the paint itself with such added value is nearly colorless and transparent, it can be applied to the walls and ceiling of the new property in advance, while taking advantage of the texture and texture of the materials of the new wall and ceiling. It can provide added value such as deodorant, antibacterial and mildew sustainability, and it will be possible to differentiate not only in the remodeling industry but also in newly built properties.

Furthermore, in Japan, where an aging society is rapidly advancing, it is resistant to staphylococci by adding antibacterial components to living rooms such as elderly facilities and hospitals, including wall cloths, ceilings, air conditioning equipment and bedding. If we can prevent the spread of SARS virus, which causes nosocomial infections such as MRSA and severe acute respiratory syndrome, we can prevent the elderly from becoming serious and provide a comfortable environment. It will be useful. In addition, even in facilities where a large number of unspecified people gather, and public transportation, a comfortable space is provided by maintaining antibacterial and deodorant effects on walls and ceilings, including deodorization and antibacterial effects of indoor air conditioning. It becomes possible to do. In order to create such a comfortable environment, existing facilities particularly require paints that increase the added value of antibacterial and deodorant while taking advantage of the aesthetics of the original materials such as color and texture. ing.
There is a need for a composite interior paint that can be applied in a relatively short time without having to prepare paints with different functions depending on the lighting environment of the construction site.

JP 2000-1649 A JP2002-167551 JP 2006-70200 A

  Antibacterial and deodorizing effects can be expected by applying paint containing a titanium oxide photocatalyst component in a room where external light is inserted or in a room with a fluorescent lamp. However, it is sufficient in bathrooms where light does not reach much. Since the function could not be demonstrated, a light source such as black light was required. Therefore, the deodorizing effect and the antibacterial effect can be continuously exerted even in a dark time zone such as nighttime, and the charge transfer type oxidation-reduction catalyst (Patent Nos. 3514702 and 4024251: a non-photocatalyst has a temperature difference. In addition to the use of a simple substance such as a catalyst that works in the field, manufactured by Philac, hereinafter referred to as a CT catalyst), and combined with a photocatalyst and a deodorant / antibacterial component, In addition to the aesthetic regeneration effect by providing paints with enhanced functions such as deodorant and antibacterial, paint that enhances the deodorant effect, antibacterial effect, antifungal / algae-proof effect while maintaining the texture of the new cloth Is to provide an improvement in the environment surrounding the elderly and young children. In addition, the purpose of this proposal is to reduce the use of various paints according to the functions of daylighting environment and temperature environment, to shorten the construction time, and to enhance the sustainability of the environment improvement function that has never been seen before.

  Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film The initial characteristics of antibacterial and deodorant are drastically improved by moderately blending non-photocatalyst CT catalyst and photocatalyst with antibacterial / antifungal component, deodorant component, etc. into interior paint composed of activator, etc. If there is external light or an artificial light source, the photocatalytic effect of titanium oxide will function more, and the antibacterial / deodorant effect will be sustained by the synergistic effect of the CT catalyst, photocatalyst, and antibacterial deodorant component even at night when the external light is very low. In order to solve the problem of improving aesthetics and providing an aesthetic regeneration function and environmental improvement function with a single coating.

This basic component is “a rutile-type titanium oxide as a main component and an inorganic component containing extender components such as calcium carbonate, talc, clay mineral, and silica as a extender component, and a resin as a main component of the coating film. CT coating and anatase-type or brookite-type titanium oxide photocatalyst (made by Showa Denko, hereinafter referred to as photocatalyst) for organic paints composed of varnishes, solvents, surfactants, etc. And antibacterial components are blended, and the interior paint, which is a basic component by weight ratio, is 84 to 97%, and the other components are 6 to 16%. Synergistic effects of odor and antibacterial effects can be obtained, and antibacterial / antifungal performance and deodorizing function can be enhanced.
Doctor Cloth (Registered Trademark 5356338) is a paint for interiors from Unicon, and the colored S series is a type mainly used when applying aesthetic regeneration during renovation with a trowel brush. Is a clear type, the solution is white opaque, but can be sprayed with a paint gun, and the finish is almost colorless and transparent. [Doctor cloth paint]: [CT catalyst + anatase titanium oxide + deodorant component + antibacterial component] = (84:16) to (97: 3) The synergistic effect of each functional component is obtained in addition to the combination of simple substances, and the antibacterial performance and deodorizing function can be enhanced.

Table 1 shows the present invention type hybrid D cloth paint (hereinafter referred to as HD cloth) in which the above-mentioned CT catalyst, photocatalytic titanium oxide, deodorant ingredient and antibacterial ingredient are blended with the basic component “Doctor cloth” (hereinafter referred to as “D cloth”). For comparison, four types of wallpaper coated with Company C paint and Company A paint and wallpaper without applying these paints (blank) were compared using an electron beam probe microanalyzer (EPMA-1600). The surface analysis was measured three times, and the weight ratio of the element was obtained.

A glance at this result shows a significant difference in the weight ratio of Ti / Si, but a clear correlation between the concentration ratio and the performance difference is difficult.
From unanalyzed cloth, it is considered that titanium oxide is used as a white-colored raw material based on analytical values. It is also used for wallpaper paints of company C, and for paints of company A, a major domestic paint manufacturer. Also contains a significant amount of titanium, which is probably rutile titanium oxide.

The wall cloth and ceiling to which this paint is applied have the following effects.
(1) The wall cloth coated with the proposed paint has a central synergistic effect between the titanium oxide photocatalyst and the CT catalyst, and a further synergistic effect with the deodorant component. The odor is eliminated. In relatively dark places, such as in the nighttime when sunlight is not inserted, or in bathrooms, the central effect of the CT catalyst is used to eliminate the odor continuously, and the reason is not clear, but the VOC decomposition rate is increased due to the synergistic effect with the photocatalyst. Seems to improve. The antibacterial deodorant component is expected to have an effect of rapidly increasing the initial characteristics, and results that actually improve are obtained.
(2) When the proposed hybrid paint is applied, it is difficult to get dirt, and the dirt is decomposed by the synergistic effect of the CT catalyst and the photocatalytic titanium oxide, and exhibits an antifouling function.
{Circle around (3)} In a room with high humidity, there is a remarkable effect of suppressing mold growth as a synergistic effect of photocatalytic titanium oxide, CT catalyst, and deodorant component, and as a result, scattering of mold spores harmful to the human body can be prevented.
(4) Since the ammonia odor can be eliminated by the synergistic effect of the CT catalyst, photocatalytic titanium oxide, and deodorant component, when the pet is raised indoors, it can live without worrying about the pet odor.
(5) Elimination of E. coli and staphylococci by the synergistic effect of CT catalyst, photocatalytic titanium oxide, and antibacterial components can provide a healthy living environment for the elderly and small children.
(6) HD cloth S series color coat can add value to antibacterial, anti-bacterial and deodorizing effects as well as aesthetic regeneration of used cloth.
(7) HD cloth C series clear coat can add antibacterial, antibacterial, and deodorant values while keeping the texture and color of the new cloth.
(8) To provide a composite paint having the above-mentioned function by blending [CT catalyst + anatase type titanium oxide + deodorant ingredient + antibacterial ingredient] in a weight ratio of 3% to 16% to a commercially available interior paint. Can do.

It is the photograph which copied the mode before and after constructing S type (color coat) of this proposal product in Table 1 to a wall cloth. It is the photograph which copied the mode before and after construction to S type (color coat) of this proposal product in Table 1 on an uneven ceiling. Table 3-1-2 is a scatter diagram. Comparison test data for D-cloth, HD cloth, and other companies' interior paints (after one month) Table 3-2-2 is a scatter diagram. Comparison test data for D-cloth, HD cloth, and other companies' interior paints (after 1 and a half years) Table 4-1-2 is a scatter diagram. Company A interior paint and paint comparison test data (1 month later) Table 4-2-2 is a scatter diagram. Company A interior paint and paint comparison test data hybridized with it (after one and a half years) Table 5-1-2 is a scatter diagram. Company C interior paint and paint comparison test data hybridized with it (after one month) Table 5-2-2 is a scatter diagram, Company C interior paint and paint comparison test data hybridized with it (after one and a half years)

“Doctor Cloth” (registered trademark) includes the S series for color coats for the purpose of aesthetic regeneration of the cloth during remodeling, and the C series for clear coats that take advantage of the colors and patterns of new cloths. is there.

  "Doctor Cross" S type (hereinafter referred to as DS) is composed of 90% to 98% by weight, 2% of anatase type titanium oxide and 2% of CT catalyst, deodorizing components and antibacterial / preventive The cocoon component was blended 3% each to make a hybrid type. In addition, competing interior paints from other companies were selected, and these were also evaluated as hybrid types in Comparative Test Tables 3, 4 and 5.

D cross, HD cross, and other company's interior paint comparison test will be described in detail.
Table 1 shows the X-ray intensity ratio using HD cloth, paint from a major paint manufacturer A, and cloth recycled paint from company C in the same industry on the same wallpaper, using an electron probe microanalyzer (EPMA-1610). Elemental analysis of the wallpaper surface was performed. Elemental analysis was similarly performed on cloths made of the same material as those coated with these paints, with the uncoated state as a blank. The blank wallpaper also contains titanium oxide as a white paint. From the results in Table 1, it seems that a deodorizing effect can be expected, but it is also considered to have an adsorption effect.

Examples and Comparative Examples As compounding materials for making a hybrid type, titanium oxide is a product of Showa Denko KK, CT non-photocatalyst is a product of Filac International Co., Ltd. used.

From the results in Table 1, since there are few photocatalysts, CT catalysts, and antibacterial / deodorant components blended in HD cloth, there is no characteristic difference in composition values due to the blending of these functional components against the composition of competing products. . The composition of HD cloth, especially Ti, Si, O constituting the main component of the interior paint, and their blending ratio Ti / Si (extreme pigment ratio), O / C (oxide / organic component) values, The composition is located between the products of major paint manufacturers and C products of similar products, and the ratio of elements is considered to be a general composition. However, the difference in performance of deodorant / antibacterial function cannot be estimated from the analysis result of the surface composition.

The antibacterial test results of D cloth and various HD cloths are as follows.

Table 2

Table 2-1 Antibacterial activity evaluation test Sample: PVC wallpaper 2. Test methods Test method: film adhesion method ^{(JISZ2801 -2000)}
Species: E. E. coli NBRC 3972, S. coli. aureus (Staphylococcus aureus) NBRC12732
Bacterial liquid conditions: 1 / 100NB 0.4ml
Working condition: 35 ° C. 24 hr
Covering film: PE 4cm x 4cm
3. Sample composition
4). result
From the above results, it is understood that any of the hybrid type (2), (3), (4), and (5) based on the DS of (1) has antibacterial activity against Escherichia coli and Staphylococcus aureus.

Table 2-2 Mold resistance test Specimen and sample: Same as specimen number used in Table 2-1 applied to PVC wallpaper. Test Method Test Method: JIS Z 2911-2000 Test B of Plastic Products Sample Preparation: Cut into 4 cm Test Mold: Aspergillus niger, Penicillium funiculosum, Chaetomilum globosum Paecilomyces variocilii, Grivicium
Spore suspension: spore count of about 105 / ml, JIS Z 2911 glucose / inorganic salt solution 0.1 ml
Agar medium: 9 cm glucose / inorganic salt agar medium Culture conditions: Temperature: about 28 ° C. Humidity: 90% or higher 28-day result display: The growth status of mycelia is described based on the following table by observation with the naked eye and a stereoscopic microscope
3. result
From the above results, when a CT catalyst or a photocatalyst is blended with DS, a clear inhibitory effect is recognized, but the mold resistance is weaker than those blended with both components. It was found that the combination of antibacterial ingredients is effective for complete suppression.

Table 2-3 Mold resistance test-Hello test-
1. Specimen and sample: same sample used in Table 2-1 applied to PVC wallpaper Test method-On a potato dextrose agar medium (diameter: 8.5 cm), 150 μL of a dispersion solution * in which black mold (Cladosporium cladosporoides) spore was suspended was sprayed, and evenly spread using a conage bar.
-A specimen cut in a 4 cm square was placed there and cultured at a temperature of about 25 ° C and a humidity of 90% or more.
-The number of mold spores used for the evaluation was about 105 / mL.
-The width of growth (inhibition zone) where no mold growth was observed around the specimen was observed with the naked eye.
※ NaNO3 2.0g KH2PO4 0.7g K2HPO4 0.3g KCl 0.5g MgSO4 · 7H2O 0.5g FeSO4 · 7H2O 0.01g / 1L
3. Evaluation results
From the above results in Table 2 (2-1, 2-2, 2-3), from the results of the antibacterial test, the hybrid type other than the D cross that does not contain anything in the test with bacteria (E. coli, Staphylococcus aureus) In all, the antibacterial activity values were 3.6 and 3.2 or more, respectively, and cleared the standard value 2.0 or more of the Antibacterial Product Technical Council. In the mold resistance test that visually observes the growth state, the product containing the antibacterial component most inhibited growth, but even if the antibacterial component was not added, by combining the CT catalyst and the photocatalyst, It was shown that it has considerable resistance to growth. On the other hand, in the mold resistance test, the growth inhibition zone was 18 mm in all of the five types of molds, and the remarkable mold resistance was recognized.

Various acetaldehyde decomposition tests were carried out by the following methods.
Test method: This method is a standard test method 1) Sample 10cm x 10cm Affixed with aluminum tape on the back 2) Put each sample in a test bag and inject a predetermined volume of air 3) Inject a test gas to a predetermined initial concentration It was.
4) Residual gas concentration after 2 hours, 24 hours and 48 hours was measured with a detector tube.

Table 3. Doctor cloth, hybrid doctor cloth, other companies interior paint comparison test
3-1) Test one month after coating Table 3-1-1. Acetaldehyde degradation test (1 month)
Table 3-1-2 Residual percentage of acetaldehyde over time (%)

3-2) Test after outdoor exposure for 1 and a half years after coating Table 3-2-1 Acetaldehyde degradation test (sample for 1 and a half years after application)
Table 3-2-2 Acetaldehyde residual rate over time (%)

Table 4. Company A interior paint test blended with our Unicon hybrid type
4-1) Test one month after coating Table 4-1-1 Acetaldehyde degradation test
Table 4-1-2 Residual percentage of acetaldehyde over time (%)

4-2) Test after outdoor exposure for 1.5 years after coating Table 4-2-1 Acetaldehyde degradation test
Table 4-2-2 Residual ratio of acetaldehyde with time (%)

Table 5. Company C interior paint test blended with our Unicon hybrid type
5-1) Test one month after coating Table 5-1-1 Acetaldehyde degradation test
Table 5-1-2 Residual percentage of acetaldehyde over time (%)

5-2) Test after 1 year and a half after outdoor exposure after coating Table 5-2-1 Acetaldehyde degradation test
Table 5-2-2 Acetaldehyde residual ratio with time (%)

Table 3 (3-1-1, 3-1-2, 3-2-1, 3-2-2), Table 4 (4-1-1, 4-1-2, 4-2-1, 4 2-2) and the results of Table 5 (5-1-1, 5-1-2, 5-2-1, 5-2-2) are considered as follows.
Table 3-1-1, 3-2-1 and the test results of FIGS. 3 and 4 show that DS is slightly better in comparison test with non-hybrid DS and genuine products of Company A and Company C. It was. In addition, when the hybrid type is used, both the products of Company A and the products of Company C have excellent deodorizing performance, and that the performance is maintained even after one and a half years have passed. -1-1, 4-2-1 and FIGS. 5 and 6, and the products of Company C are shown in the tests of Tables 5-1-1 and 5-2-1 and FIGS. In addition, in order to greatly improve the initial characteristics, it was shown from the tests 1, 2, and 3 that the blending of the deodorant component (using Toagosei Co., Ltd. product) was indispensable.

Table 2-1 shows the antibacterial activity evaluation test after coating Escherichia coli and Staphylococcus aureus on PVC wallpaper coated with the hybrid type paint of the proposed product and showing the antibacterial activity value after 24 hours at 35 ° C. is there.
Naturally, it is known that photocatalytic titanium oxide kills Escherichia coli and Staphylococcus aureus, destroys its toxins, and makes them non-toxic. The number of bacteria is 10 or less.

  From these results, even if it is S type or C type, if it is a hybrid type, the antibacterial action of the photocatalyst mainly functions in the bright place, and in the dark place or the place where the light is weak, the function of the CT catalyst It seems that antibacterial effect is acting. However, it is presumed that the synergistic effect of the CT catalyst and the photocatalyst is developed more than that.

  Therefore, by applying the proposed product to the entire interior of living spaces such as elderly facilities and hospitals, SARS virus that causes severe acute respiratory syndrome and methicillin-resistant Staphylococcus aureus can be used for indoor wall cloths and entrances. The antibacterial action of the proposed product is considered to be effective even when it adheres to the handle.

  Therefore, the proposed product is a paint that can provide added value such as antibacterial, antifungal, and deodorizing functions in the modern age of aging society as well as the aesthetic regeneration of cloth. Moreover, if it is a clear type also for a newly built property, it can be a paint that can be applied in a short period of time with the value of antibacterial, etc. while taking advantage of the pattern and color of the newly built cloth.

The hybrid interior paint of this proposal is a paint that can provide added value such as odor elimination, antibacterial action, and antifungal action of acetaldehyde and formaldehyde, as well as aesthetic regeneration of indoor remodeling with S type color coat.
In addition, C-type clear coats can be added to newly built properties while providing the added value of anti-bacterial and anti-bacterial effects such as acetaldehyde and formaldehyde, while taking advantage of the pattern and color of the new wall cloth.

  Moreover, if the C type is applied not only to buildings but also to public transportation vehicles and hotel rooms used by a large number of unspecified people, not only the decomposition of acetaldehyde but also a body odor can be expected.

In addition, for general paints, the addition of the proposed additive can eliminate aldehydes by catalytic function in light and non-light spaces, and also has antibacterial and antifungal properties. Can be added. As a result, it can be expected to provide a composite interior material that provides clean living space along with the aesthetic regeneration of the cloth.

Claims (10)

  Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film Combined type interior paint combining a charge transfer type catalyst (Patent Nos. 3514702 and 4024251) that exhibits a continuous antibacterial and deodorant action even in the absence of light.   Charge transfer catalysts that exhibit a continuous antibacterial deodorizing action even in the absence of light on interior paints composed of resin varnishes, solvents, surfactants, etc., which are the main components of the coating (Patent Nos. 3514702 and 4024251) ), An additive that enhances the function of general paints in places with little light effect Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film A composite interior that combines a charge transfer catalyst that exhibits a continuous antibacterial and deodorant action even in the absence of light, and a photocatalyst component that exhibits a higher antibacterial and deodorant action in the presence of light. paint Charge transfer catalyst that exhibits a continuous antibacterial deodorizing effect even in places where there is no light in the interior paint composed of resin varnishes, solvents, surfactants, etc., which are the main components of the coating film, and higher in places where there is light Additives that combine photocatalytic components that exhibit antibacterial and deodorizing effects. These are paints that enhance the photocatalytic and non-catalytic functions of general paint Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film A charge transfer type catalyst that exhibits a continuous antibacterial and deodorant action even in places where there is no light in the interior paint composed of an activator, etc., a photocatalyst component that exhibits a higher antibacterial and deodorant action in places with light, and an initial antibacterial / Combined interior paint combining antibacterial and deodorant ingredients that dramatically improve deodorant properties Charge transfer catalyst that exhibits a continuous antibacterial deodorizing effect even in places where there is no light in the interior paint composed of resin varnishes, solvents, surfactants, etc., which are the main components of the coating film, and higher in places where there is light Photocatalyst component that exhibits antibacterial and deodorant effects, and an additive that combines antibacterial and deodorant components that dramatically improve the initial antibacterial and deodorant properties. Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film A composite type interior paint containing a charge transfer catalyst at a concentration of 0.1% or more and 5% or less that exhibits a continuous antibacterial and deodorant action even in the absence of light. Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film A charge transfer catalyst that exhibits a continuous antibacterial and deodorant action even in the absence of light in an interior paint composed of an activator, etc., at a concentration of 0.1% or more and 5% or less, and a higher antibacterial effect in places with light. Composite type interior paint blended at a concentration of 0.1% or more and 5% or less of a photocatalytic component exhibiting odor effect Inorganic components that contain rutile titanium oxide as the main component and other extender components such as calcium carbonate, talc, clay minerals, and silica as extender components, and resin varnishes, solvents, and interfaces that are the main components of the coating film A charge transfer catalyst that exhibits a continuous antibacterial and deodorant action even in the absence of light in an interior paint composed of an activator, etc., at a concentration of 0.1% or more and 5% or less, and a higher antibacterial effect in places with light. The concentration of the photocatalyst component exhibiting an odor effect is 0.1% or more and 5% or less, and further the antibacterial component and the deodorizing component that dramatically improve the initial antibacterial / deodorant properties are 0.1% or more and 3% or less. Combined composite interior paint [Doctor cloth paint or commercially available interior paint]: [CT catalyst + anatase titanium oxide + deodorant component + antibacterial component] = (84:16) to (97: 3) Formulation and paint production method for improving the antibacterial performance and deodorizing function, as well as the synergistic effect of each functional component, not just the compounding of photocatalytic titanium oxide alone