JP2007291303A - Coating material for interior use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating material for interior use having decomposition and deodorization performance for a volatile organic compound and an odor, as well as moisture conditioning performance, antibacterial activity and excellent application performance. <P>SOLUTION: This coating material comprises 15-25 vol% of a vehicle composed of an aqueous acrylate ester polymer or its copolymer, 40-50 vol% of water, 20-25 vol% of an artificial zeolite with an average particle size of ≤30 μm, a specific surface area of ≥120 m<SP>2</SP>/g and a base exchange capacity (meq/100 g) of ≥200 mg, as well as 10-15 vol% of a silicon oxide foamed fine powder with an average particle size of ≤30 μm, a pH value of 12-13 and apparent specific gravity of 0.2-0.5, and 2-5 vol% of a surfactant composed of a nonionic surfactant or an amphoteric surfactant, in a dispersed and mixed state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an interior coating material, and more particularly to an interior coating material that retains the decomposition, deodorization, humidity control and antibacterial properties of volatile organic compounds and odors and is excellent in workability.

Conventional technology

In today's buildings, in addition to improvements in construction techniques such as fireproof and incombustible structures and precut construction methods, combined with heavy use of construction hardware and new construction materials, residential buildings in suburbs as well as high-rise office buildings and residential buildings in urban areas In buildings and the like, the sealing performance has been remarkably increased.
For this reason, volatile organic compounds and odors leached from the frequently used new building materials themselves or from adhesives, wallpaper materials, paints, etc. for interior construction, or leached from stored furniture, fixtures, furniture furniture, etc. Elucidation of the main cause of so-called sick house syndrome, in which many illnesses are caused by volatilization and retention in a highly enclosed building block due to volatilization of volatile organic compounds and odors. As a result, it has become a major social issue and has already been legally regulated.

  Furthermore, the increase in airtightness will warm the interior of the building throughout the year, and the ventilation will be hindered, so condensation will easily occur on the inner wall surface, and the growth of attached bacteria and moths will increase. Breeding odors The so-called moldy odor and the secretions secreted by breeding cause not only the interior materials themselves but also the body to be damaged and deteriorated. And these carcasses become allergens and cause childhood asthma and atopic dermatitis, etc., and the highly enclosed building compartment is in an extremely dangerous and unsanitary environment.

  In addition, odors associated with the propagation of bacteria, spiders or microorganisms, and odors from the foods themselves are likely to diffuse and stay in the water areas such as kitchens, bathrooms, and toilets. In residential areas with elderly caregivers, the body odor and filth odor, or animal odor due to the breeding of pets diffuses and stays, and these materials adhere to and permeate interior materials and furniture furniture. It is the result that is put on.

  On the other hand, on the one hand, devices that generate and diffuse ozone or negative ions as a means for decomposing or deodorizing volatile organic compounds and odors have been advertised, and some of them have been tried. Building blocks where volatile organic compounds, odors, etc. are diffused and retained have a vast space volume, so that volatile organic compounds that diffuse and stay within the vast space volume are decomposed and odors are deodorized. Would require the production and diffusion of extremely high concentrations of ozone, making it impractical for safety reasons. Furthermore, the means by negative ions is also necessary for the decomposition and deodorization of volatile organic compounds, and the negative ion density of 300,000 / cc or more is required from the results of requests from the inventors. Decomposition and deodorization of volatile organic compounds and odors require the production of negative ions with a density of at least 4 to 50 times or more in consideration of diffusion dilution, and the decomposition and deodorization of these negative ions. The creation is limited to a few seconds at most, and no practically effective negative ion generator has been developed.

  On the other hand, as a means for adsorbing these volatile organic compounds and odors, a humidity control coating material in which a vehicle is mixed with porous diatomaceous earth or a diatomaceous earth plate material in which diatomaceous earth is appropriately coated on a substrate has been put on the market. Diatomaceous earth is a natural product, and its quality varies remarkably depending on the mining layer and mining site. In the coating material, cracks are easily generated with coating and drying, and the diatomaceous earth plate material is also initially adsorbed due to its porosity. However, it does not only absorb adsorption in a short period of time and loses its subsequent adsorptivity, but also causes odorous volatile organic compounds and odors to be re-dissipated, resulting in the generation of new off-flavors, and further against moisture and moisture. However, due to its strong chemical water absorption, once the water has been absorbed, it takes a very long time to release and dry. Are inherent problems such as that.

  On the other hand, in recent years, inorganic industrial wastes such as casting waste sand and coal incineration ash are treated with alkali, and the eluted silicon oxide and aluminum oxide are treated with high temperature and high pressure to increase the number of adsorbed micropores, so-called specific surface area is large and basic. Since the substitution capacity (meq / 100g) is extremely large and the artificial zeolite powder that retains the catalytic action can be mass-produced, the artificial zeolite powder that retains the required performance is blended with the water-soluble coating component. In addition, by applying it to the inner wall of the building compartment, the volatile organic compounds that volatilize and stay in the building compartment are adsorbed and decomposed, the odor is deodorized, and the moisture is absorbed and retained in accordance with the degree of drying. Thus, interior coating materials and interior coating materials that can be maintained at a substantially constant humidity have been developed and already disclosed in Japanese Patent Application Nos. 2001-116164 and 2002-264787.

Thus, the coating material according to the invention of the prior application has an excellent humidity control property of the artificial zeolite powder blended, so that moisture is positively released when it is applied in a building compartment, and a coating film is formed in a very short time. It is considered that the coating workability is remarkably excellent and the adsorptive decomposability, deodorization and humidity control of volatile organic compounds are considered to be sufficiently effective, but the ventilation is poor and condensation is likely to occur. There is still a risk of contamination and deterioration due to the adhesion and propagation of bacteria and sputum on the coated film surface in the place.
In addition, since the coating material is also intended to be beautifully decorated, it is necessary to color it in various colors. However, since artificial zeolite powder is dark gray, it is once whitened to achieve the desired color tone. Therefore, a large amount of white toning material such as titanium oxide, white viscosity or calcium carbonate must be blended, and coloring with a desired coloring material must be performed, which is expensive in price.

However, the use of a large amount of these white color-adjusting materials makes it easy to color, but inhibits adsorption and decomposition of volatile organic compounds exhibited by artificial zeolite powder and deodorization against odors, and white clay. In addition, it has been found from practical use that the use of calcium carbonate and calcium carbonate has a high chemical water absorption and a high humidity control property.
As a result, the inventors conducted further research and as a result, the silicon oxide in natural rocks and inorganic industrial wastes was once eluted with an alkali agent to form so-called water silicate so-called water glass, and the condensing action of its silanol groups By heating the siloxane and silanol salt multimolecular weight solution having a molecular weight of about 4,000 by heating at least 100 ° C., the moisture transpiration and the heat fusibility are created and the siloxane bond is promoted. Therefore, the foaming ratio is 20 to 25 times when no pressure is applied, and it has a very large open cell structure with a fine pore size due to moisture evaporation, and also has a high alkalinity with a pH value of about 12 in a silicon oxide state. Focusing on the formation of a pure white inorganic foam molded product, and by micronizing the inorganic foam molded product and using it as a toning material, To investigate that that superior remarkably improve the bulking reduction and humidity conditioning and toning of antibacterial exhibited and the coating film can be achieved leading to the present invention.

  An object of the present invention is to provide an interior coating material that retains decomposition, deodorization, humidity control and antibacterial properties of volatile organic compounds, is inexpensive and extremely excellent in workability.

The technical means used by the present invention to solve the above-mentioned problems is to prevent the volatilization and elution of volatile organic compounds as well as harmful chemical substances in practical use by forming a coating film. It uses water, and forms a strong and strong coating film on the adherend made of various materials such as metal plate materials and new building materials as well as the concrete and mortar walls that form the building blocks. From the top, acrylic ester or a copolymer thereof is suitable as a material for the vehicle. Therefore, water-soluble acrylic ester or a copolymer thereof is 15 to 25% by volume, and water as a solvent is 40 to 50% by volume. In order to exhibit the adsorption and decomposition of volatile organic compounds and the deodorization and humidity control action of volatile organic compounds, the average particle size is 30 μm or less and the specific surface area is 120 m ² / g or more, In addition, artificial zeolite powder having a base substitution capacity (meq / 100 g) of 200 mg or more is blended in an amount of 20 to 25% by volume. And the prevention of the growth of adherent bacteria and sputum due to high alkalinity with a pH value of 12 or higher, the simplification of toning by pure whitening accompanying the foaming of silicon oxide, and the specific gravity is as low as 0.2 to 0.5 In order to increase the amount by specific gravity, a silicon oxide foam fine powder having an average particle size of 30 μm or less is blended at a ratio of 10 to 15% by volume. A dispersant composed of an amphoteric surfactant is dispersed and mixed in a proportion of 2 to 5% by volume.

  In addition, although the present invention is also intended for cosmetics, the silicon oxide foam fine powder for toning retains a dull color tone, so that the silicon oxide foam fine powder is used for creating a bright feeling. 3 to 5% by volume and titanium oxide 7 to 10% by volume are proposed. If coloring is required, an inorganic color pigment is dispersed and mixed at a rate of 0.5 to 2.0% by volume. Exist.

The present invention is constituted as described above, and a water-soluble acrylate ester or a copolymer thereof is used in the vehicle, and the material to be dispersed and mixed is slightly different from artificial zeolite powder, silicon oxide foam fine powder, titanium oxide and the like. Because it is an inorganic colored pigment and a surfactant, a coating film is formed by evaporation of only water and harmful volatile substances and There is no elution substance, and extremely high safety is maintained.
In the present invention, the contact surface area ratio with an average particle size of 30 μm or less is extremely large, the adsorption capacity with a specific surface area of 120 m ² / g or more is enormous, and the base substitution capacity (meq / 100 g) is 200 mg or more. Artificial zeolite powder that retains ion exchange capacity and retains its catalytic action is dispersed and blended at 20 to 25% by volume, so that volatile organic compounds and odors are actively contacted and absorbed to eliminate decomposition and separation. It eliminates odors and does not cause adsorption saturation, so that it can maintain the function of decomposing and eliminating odors over a long period of time.

Further, since the silicon oxide foam fine powder having an adsorption capacity comparable to the specific surface area of the artificial zeolite powder is dispersed and blended at a ratio of 10 to 15% by volume, the water retained together with the coating is actively discharged and released. Because it is moistened, the coating film is dried to form in a short time, and the coating workability is remarkably improved. Excess moisture is absorbed together with the artificial zeolite powder and the moisture is released at the time of drying. .
In addition, since the silicon oxide foamed fine powder has a high alkalinity with a pH value of 12 or more, the growth of bacteria and soot adhering to the coating film surface is prevented, and the pure white color unique to the silicon oxide foamed fine powder In addition to making it possible to adjust to various color tones, the specific gravity is 0.2 to 0.5, and the low specific gravity is bulky.

20 volumes of water-soluble acrylic acid ester, 45 volumes of water, 20 volumes of artificial zeolite powder having an average particle size of 30 μm or less, a specific surface area of 120 m ² / g or more, and a base substitution capacity (meq / 100 g) of 200 mg or more And 13% by volume of silicon oxide fine powder having an average particle size of 30 μm or less, a specific gravity of 0.2 to 0.5, and a pH value of 12 or more, and a nonionic surfactant at a ratio of 2% by volume. An interior coating material.

  In the following, the embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an enlarged explanatory view of the present invention, and the coating component so-called vehicle 1A constituting the interior coating material 1 forms a building section. Since the adherend surface is made of various materials such as concrete and mortar wall surfaces, metal plate materials and new building materials, a tough and strong coating film 2 can be formed on the adherend surface made of these materials. In addition to the formation of the coating film 2, it is required that the coating film 2 be safe without volatilization and elution of volatile organic compounds and harmful substances during practical use. For this purpose, the material of the vehicle 1A is selected from an acrylic ester or a copolymer of the acrylic ester and methyl or ethyl acrylate, butyl, amide or the like.

The acrylic ester or copolymer thereof, which is the material of the vehicle 1A, is toughly and firmly applied to the surface of the coating film 2 formed by coating using the interior coating material 1 of the present invention. In addition, it is used at a ratio of 15 to 25% by volume with respect to the total volume in order to exhibit the characteristics of other materials to be dispersed and mixed.
The interior coating material 1 of the present invention is required to be free from volatilization and elution risk of volatile organic compounds, harmful substances, odors, etc., not only during construction for forming the coating film 2 but also in practical use. However, water 1B is used as the solvent, and the viscosity of the coating film 2 is approximately 10,000 to 40,000 cP (by a Wooler roller, a sand bone roller, a brush, or spraying when the coating film 2 is formed. The water 1B is used in a proportion of 40 to 50% by volume in order to form a viscosity of centipoise. Therefore, since water 1B is used as a solvent as a matter of course, the acrylic ester and its copolymer as the vehicle 1A are water-soluble, and in some cases, the acrylic ester emulsion or its copolymer is used. A physical emulsion is also used.

In addition, the coating material 1 for interior decoration of the present invention starts desorption and conditioning of odors, including adsorption and decomposition of volatile organic compounds and harmful gases, when the coating film 2 formed by coating is used for practical use. The artificial zeolite powder 1C is dispersed and mixed at a rate of 20 to 25% by volume.
The artificial zeolite powder 1C has a large contact surface area ratio with respect to volatile organic compounds, harmful gases, odors, moisture, etc., and actively adsorbs, decomposes, deodorizes, or absorbs and desorbs moisture. In addition, the average particle size is 30 μm or less, preferably 1 to 20 μm in fine particles, and in order to maintain a huge adsorption capacity, the specific gravity area is at least 120 m ² / g or more, preferably 150 to 180 m ² / g or more. In order to decompose and eliminate the adsorbed volatile organic compound, harmful gas or odor number, the base substitution capacity (meq / 100 g) is preferably 200 mg or more, preferably 250 to 300 mg or more. The artificial zeolite itself inherently retains the catalytic action that promotes this ability of base substitution.

  Furthermore, the interior coating material 1 of the present invention is used to prevent the adhesion material and the body from deteriorating and deteriorating by suppressing the growth of adherent bacteria and moss during the practical use of the applied coating film 2. Artificial zeolite that is highly conditioned and dispersed and mixed to prevent moisture condensation and create a comfortable building compartment environment by humidity control while maintaining high alkalinity and without the risk of volatilization or elution The basic color tone of the powder 1C, which is dark gray, is once adjusted to a white color and then toned with the inorganic color pigment 1F to provide the required color tone. The fine foamed silicon oxide powder 1D is dispersed and mixed at a rate of 10 to 15% by volume.

  This silicon oxide foam fine powder 1D has a large contact surface area to effectively exhibit antibacterial action due to high alkalinity, and further enhances hygroscopicity and moisture release with the artificial zeolite powder 1C. The average particle size is 30 μm or more, preferably 1 to 20 μm. This silicon oxide foam fine powder 1D is obtained by eluting silicon oxide in inorganic industrial waste with an alkali agent to form water glass, and then condensing the silanol group to increase the molecular weight to about 4,000. To form a siloxane and silanol salt multi-molecular weight solution, and by heating at 100 ° C. or higher, the water evaporation, the creation of heat-fusible properties and the promotion of siloxane bonds increase the expansion ratio to about 3 to 7 times. By foaming, transpiration holes 10D having a fine and enormous number of open-cell structures accompanying water transpiration are formed, a highly alkaline oxidation having a specific gravity of about 0.2 to 0.5 and a pH value of 12 to 13. In order to form a silicon foam, to increase the contact surface area ratio and to achieve uniform dispersion mixing and to form the coating film 2 smoothly by coating, the average particle size is 3 μm or less preferably are those milled formed fine powder of 1 to 20 [mu] m.

  The interior coating material 1 of the present invention is dispersed because the artificial zeolite powder 1C and the silicon oxide foam fine powder 1D need to be homogeneously dispersed and mixed in the vehicle 1A made of a water-soluble acrylic ester or a copolymer thereof as described above. As the agent 1E, a nonionic surfactant or an amphoteric surfactant is mixed in an amount of 2 to 5% by volume. Specific examples of the nonionic surfactant include polyoxyethylene alkyl ether and polyoxyethylene alkyl. Examples of allyl ethers and amphoteric surfactants include alkyl betaines and amide betaines.

Thus, since the interior coating material 1 of the present invention is also an important object for the interior decoration of buildings, the inorganic coloring pigment 1F for coloring in a desired color tone is 0.5 to 2.0% by volume according to the purpose of use. Is dispersed and mixed. Further, for the color of the exterior decoration, the interior coating material 1 of the present invention has a relatively large volume ratio of the artificial zeolite powder 1C and the silicon oxide foam fine powder 1D dispersed and mixed. The color tone of the coating film 2 is also formed with a dull color sensation with a strong natural feeling peculiar to inorganic materials.
However, many bright colors are required in building sections such as stores. For this purpose, it is proposed to suppress the silicon oxide foam fine powder 1D used for toning to 3 to 5% by volume and to use titanium oxide 1G together to 7 to 10% by volume.

The interior coating material 1 of the present invention, which is dispersed and mixed with such a composition, is applied to the surface to be coated with a coating tool such as a woofer, sandbone roller or brush, or using a spray coating tool such as a spray gun. By doing so, the coating layer 2 as shown in FIG. 2 is formed on the deposition surface in a short time and firmly.
In this case, when the interior material 1 of the present invention having a viscosity of about 30,000 cP dispersed and mixed according to a general composition is applied with a wool roller, it is applied at a coating weight ratio of about 60 to 200 g / m ^2. The clothes are made.

  The results of the deodorant and humidity control tests and antibacterial tests by the coating film formed by coating the interior coating material of the present invention will be described below. The composition of the sample used in each test was a water-soluble acrylic ester 15 The interior coating material in which the volume is 45% by volume, water is 20% by volume, artificial zeolite powder is 20% by volume, silicon oxide foam fine powder is 18% by volume and nonionic surfactant is 2% by volume. An aluminum plate having a coating film formed on one side with a coating thickness of 0.6 mm was used, and a control using titanium oxide instead of the silicon oxide foam fine powder having the above composition was used as a control.

  In the deodorization test, a desiccator with an internal volume of 18 liters was used, the sample and the control were cut into a size of 20 cm × 20 cm and put into the desiccator, and ammonia gas, isovaleric acid gas and hydrogen sulfide gas were injected at predetermined concentrations. The sample was sealed and the residual gas concentration was measured for each elapsed time with a gas detector tube. As a result, as shown in Table 1, the sample in which the silicon oxide foam fine powder was dispersed and mixed was found to be more excellent in deodorizing properties.

  In the humidity control test, the same sample and control were used and placed in a desiccator with an internal volume of 1.8 liters. The desiccator was kept at a humidity of 98%, and the change in internal humidity was measured over time. Hygroscopicity is judged, and further, the moisture release property is obtained by immersing the sample and the control in water for 2 hours in advance and allowing them to absorb water sufficiently. Each sample is then placed in a desiccator kept in a 32% humidity atmosphere and sealed. As shown in Table 2, in the sample in which the silicon oxide foam fine powder is dispersed and mixed, the result is a transpiration pore with a fine and enormous number of open cell structures related to the foam. It is confirmed that excellent moisture conditioning properties are exhibited by the moisture absorption and desorption effect.

Further, the antibacterial property test was carried out using Escherichia coli and Escherichia coli in advance to be 10 ⁶ / ml in an agar medium, inoculated on a sample and a control surface, and left in an incubator at 35 ° C. for 48 hours to determine the number of E. coli. The results are as shown in Table 3, and it is understood that the high alkalinity of the silicon oxide foam fine powder has an excellent reproduction inhibiting effect.

  By adjusting the viscosity according to the application method, the application can be easily performed with a woofer roller, sandbone roller, brush or spraying machine, and a safe, comfortable and hygienic building section is realized.

  It is expansion explanatory drawing of the coating material for interior.   It is expansion explanatory drawing of the formation state of a coating film.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interior coating material 1A Vehicle 1B Water 1C Artificial zeolite powder 1D Silicon oxide foam fine powder 1E Dispersant 1F Inorganic coloring pigment 1G Titanium oxide 10D Evaporation hole 2 Coating film

Claims (3)

15 to 25% by volume of a vehicle comprising a water-soluble acrylate ester or a co-polymer thereof, 40 to 50% by volume of water, an average particle size of 30 μm or less, a specific surface area of 120 m ² / g or more, and a base substitution capacity ( 20 to 25% by weight of artificial zeolite powder having a meq / 100 g) of 200 mg or more, an average particle size of 30 μm or less, a pH value of 12 to 13 and an apparent specific gravity of 0.2 to 0.5 An interior coating material comprising 10 to 15% by volume of a silicon oxide foamed fine powder comprising 1% and 15% by volume of a nonionic surfactant or an amphoteric surfactant.   The interior coating material according to claim 1, wherein the silicon oxide foam fine powder is dispersed and mixed at a ratio of 3 to 5% by volume and titanium oxide at a rate of 7 to 10% by volume.   The interior coating material according to claim 1 or 2, wherein the inorganic coloring pigment is dispersed and mixed at a ratio of 0.5 to 2.0% by volume.

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