KR100710002B1 - Modified natural zeolite, coating composition and building interior material for high adsorption and removal rate for pollutants - Google Patents

Abstract

The present invention relates to a modified natural zeolite, a coating composition containing the same, and a building interior material to which the coating composition is applied. Modified natural zeolites of the present invention are 1) modified alone or in complex ion exchange by at least one selected from the group consisting of hydrogen and precious metal materials; 2) modified by a photocatalyst; And 3) reforming by both a single or complex ion exchange type by one or more selected from the group consisting of hydrogen and a noble metal material and by a photocatalyst, and thus excellent adsorption and removal power not only for polar pollutants but also for nonpolar pollutants. And it has a deodorizing power.

Natural zeolite, photocatalyst, interior materials

Description

Modified natural zeolite, coating composition and building interior material for high adsorption and removal rate for pollutants}

1 is a schematic diagram of a building interior material to which the coating composition containing the modified zeolite of the present invention is applied.

Figure 2a to 2c is a graph showing the deodorization rate evaluation results of the modified zeolites of Examples 1 to 4 of the present invention, 2a is a deodorization rate for formaldehyde (HCHO), 2b is a deodorization rate for ammonia, 2c shows the deodorization rate for benzene.

Figure 3 shows the nitrogen adsorption amount change curve of the zeolite according to the binder type (○ △ □ ◇: nitrogen adsorption curve, ● ▲ ■ ◆: nitrogen desorption curve).

4a to 4c are carbon coating fiber interior (1), general mineral coating fiber interior (2), natural zeolite coating fiber interior (3), modified zeolite coated fiber interior (4) of Example 6, Example 6 + wallpaper It is a graph comparing the deodorization rate according to the pollutant of the coalesced specimen 5 (4a: ammonia deodorization rate, 4b: formaldehyde deodorization rate, 4c: benzene deodorization rate).

The present invention relates to a modified zeolite, a coating composition containing the same, and a building interior material to which the coating composition is applied.

In recent years, as Sick House syndrome caused by various harmful chemicals such as formaldehyde and various volatile organic compounds (VOCs) released from various building materials and adhesives in new buildings has emerged as a serious problem, Consumers' interest in this is gradually increasing. Moreover, since June 2005, the Ministry of Environment has mandated that each new building, especially apartments, be rated and released according to the amount of hazardous chemicals released, so that new building interior materials can be blocked in advance. This is desperately required and the demand is expected to increase significantly.

In the case of nearby Japan, the demand for environmentally friendly building materials has been met since the guidelines for the Ministry of Health and Welfare in April 2001 and the Building Standards Act Amendment (enacted on July 1, 2003) in 2002 were issued. The growth is large. However, this only mandated the setting of a standard for the amount of harmful gas emitted to the final building and the use of building materials that can emit less harmful gases. The certification system for the quality of each of these building materials has not yet been adopted. It is staying in the early industry. As a result, similar products that do not meet the appropriate quality are pouring out of the market, adding to the confusion of consumers. However, with increasing consumer interest and stricter regulations on new home syndrome, the demand for environmentally and human-friendly building materials (eg, broths, wallpaper) is expected to increase significantly, raising concerns about the release of environmental hormones. The development of building materials using fiber materials is expected to be more active than adhesive pressing building materials, and it is pointed out that the introduction of a quality certification system for these raw materials should be hurried.

Technical development of functional super medium and wallpaper using textile materials as building interior materials has been steadily developed regardless of its performance and legal regulations. Recently, many board products using charcoal have been developed. Charcoal is a porous structure, which has excellent adsorption of harmful gases and has advantages such as breathability, heat storage, and far-infrared emission, but board products using charcoal require a complicated investment process and long time carbonization, requiring tremendous investment facilities and precision.

Patents such as “Wood ceramic method (Japanese Patent Application No. 4-164806)” or “Manufacture of functional fibrous material overlay charcoal boards (Korean Patent Application No. 10-2002-0003999)” describe techniques for reducing the process of manufacturing charcoal boards. Although it has been developed, there is a disadvantage that the use of phenol resin harmful to the human body is inevitable or there is no decomposition function after supporting harmful gas.

"Thin Finish Bio Ceramic Coating Material (Korean Patent Application No. 10-2003-0097013)" relates to a high-performance building base material for clean air, which is a harmful component of formaldehyde generated from cement toxicity and building materials. Although it has the advantage of decomposing the, adsorption time was slow and deodorization rate was also low.

In addition, when the existing ceramic coating material is applied to a nonwoven fabric or the like, a binder for attaching the same should be used.By using such a binder, pores of the ceramic coating material are blocked, thereby preventing the adsorption of contaminants or the performance of the decomposition material. Due to the effect of shielding effect, there is a problem that the performance degradation and the performance change of the ceramic coating material is severe.

In other words, it is difficult to remove polar and non-polar various pollutants only by using adsorption materials such as natural minerals and carbon that have been used in the past, and it is harmful by introducing quality certification system of construction materials such as paper, coating materials, wallpaper, curtains, and boards. Although there have been studies on the release of substances, there has been a problem in that low-grade products having relatively low performance have not been established because there is no evaluation on the functions such as decomposition and adsorption or deodorization functions of air pollutants. Therefore, there is a need to develop materials for building interiors which are capable of decomposing and absorbing both polar and nonpolar pollutants in the air and having excellent deodorizing power.

In order to solve the above problems, an object of the present invention is to provide a low-cost multi-functional material having the characteristics of absorbing and removing indoor air pollutants, the development of suitable binders without pore-clogging effect and the sheet-like, bulk applied to them It is intended to provide phase and composite interior materials. In particular, it is an object of the present invention to provide a low-cost adsorption material in the form of simultaneous removal of polar and non-polar contaminants and the application of interior materials thereof.

The present invention relates to a modified zeolite, a coating composition containing the same, and a building interior material to which the coating composition is applied. Modified zeolites of the present invention are 1) modified alone or in complex ion exchange by at least one selected from the group consisting of hydrogen and precious metal materials; 2) modified by a photocatalyst; And 3) modified by both single and complex ion exchange type and photocatalyst by one or more selected from the group consisting of hydrogen and noble metal materials, providing excellent adsorption, removal and deodorizing power for both polar and nonpolar pollutants. It is characterized by having.

Several functional mineral powders that can be used for construction were selected, and the deodorizing performance of ammonia, benzene and formaldehyde as harmful gases was evaluated. As a result, natural zeolite was 1.5 to 2 times better than other minerals for deodorizing ammonia. Deodorization performance was shown. Therefore, in the present invention, natural zeolite was used as the main material for removing and deodorizing airborne contaminants. As such, natural zeolites show a high deodorization rate for ammonia, but low deodorization rates for other nonpolar pollutants compared to polar sources such as ammonia. Accordingly, the present inventors have invented a modified zeolite capable of simultaneous removal of polar and nonpolar contaminants and excellent deodorizing power by modifying natural zeolite in an appropriate form in order to enable simultaneous removal of polar and nonpolar contaminants.

First, the modified zeolite of the natural zeolite according to the present invention is any one modified zeolite selected from the group consisting of:

1) a modified zeolite modified alone or in complex ion exchange by at least one selected from the group consisting of hydrogen and precious metal materials;

2) modified zeolites modified by photocatalysts; And

3) A modified zeolite modified by both a single or complex ion exchange type by one or more selected from the group consisting of hydrogen and a precious metal material and by a photocatalyst.

The precious metal material used for the modification of the zeolite according to the invention is preferably selected from the group consisting of Ag, Au and Pt. The precious metal material is preferably used in an amount of 0.01 to 5% by weight based on the zeolite weight. If the amount of the noble metal used for the modification is less than the above range, the removal and deodorization effect on the nonpolar pollutant is insignificant, and if the amount is more than the amount, the cost is not only increased compared to the effect but also discolored. In order to modify the zeolite to a noble metal, the zeolite may be dipped in an aqueous solution of an oxide, nitrate, hydroxide, or the like of the noble metal.

In addition, as a modified zeolite, a hydrogen ion exchange zeolite may be used, and ion exchangeable Na of natural zeolite is preferably ion-exchanged with 60% or more of hydrogen. To increase the ion exchange rate, an additional ion exchange process may be required.

Preferably, the natural zeolite may be substituted with an ammonium functional group using ammonia water, ammonium salt, or the like, and ammonia may be removed by heat treatment to obtain a hydrogen ion exchange zeolite.

In addition, in the present invention, any photocatalyst used for zeolite modification may be any known photocatalyst, and may be selected from the group consisting of TiO2, ZnO, CdS, and Perovskite. However, currently available photocatalysts are known to be less effective for indoor applications because they are more active in ultraviolet light than in visible light, and research on active photocatalysts in visible light is being actively conducted. Subsequent replacement of photocatalysts with such performance is desirable. Therefore, the photocatalyst according to the present invention is not limited thereto. The amount of the photocatalyst used is preferably 1 to 10% by weight based on the zeolite weight. If less than the above weight range, the decomposition effect due to the photocatalyst is insignificant, and if it is large, the cost is increased compared to the effect, and the surface of the natural zeolite may be excessively coated so that the adsorption effect may be rather hindered.

In a preferred embodiment of the present invention, the modified zeolite may be modified with Ag, H, photocatalyst, Ag / H, Ag / photocatalyst or Ag / H / photocatalyst.

The modified zeolite of the present invention has a very simple manufacturing process and is environmentally friendly because it does not use harmful substances to the human body, and is excellent in adsorption and removal power as well as decomposition power of a pollutant. Has the advantage of improving. In addition, the modified zeolite of the present invention is about 4 times faster than the conventional ceramic coating material (for example, Korean Patent Application No. 2003-0097013), and has excellent deodorization rate.

Using this property, the present invention provides an air quality improver having good adsorption, removal and deodorizing power for both polar and nonpolar pollutants containing modified zeolites as described above. The present invention also provides a method for improving air quality comprising the steps of adsorbing, decomposing and removing polar pollutants, nonpolar pollutants or both in air using modified zeolites as described above. In the air quality improvement method, when using modified zeolite modified by using a photocatalyst, the method comprises irradiating ultraviolet rays. In the modified zeolite of the present invention, the pollutant is ammonia; Aromatic compounds including benzene and phenol; Ketone compounds such as acetone; And it may be selected from the group consisting of aldehyde compounds such as formaldehyde and acetaldehyde.

The present invention also provides a coating composition containing a modified zeolite as described above and a building interior material containing the modified zeolite having excellent adsorption, removal and deodorizing power for both polar and nonpolar contaminants. The coating composition of the present invention contains a modified zeolite and a binder, and the content ratio of the modified zeolite and the binder is preferably 4: 6 to 6: 4. When the content of the binder is less than the above range, it is difficult to form a coating layer on the desired substrate, particularly a nonwoven fabric with an appropriate adhesion, and when more than the above range, the content of the modified zeolite is lowered to obtain a desired pollutant removal effect. In order for the coating composition to form a coating layer with an appropriate adhesion to a desired substrate and to obtain a desired pollutant removal effect, the coating composition preferably contains a modified zeolite and a binder in the content ratio range.

The binder may be at least one selected from the group consisting of acrylic, polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE) and ethylene vinyl acetate (EVA). In a preferred embodiment, the binder is a mixture containing polypropylene and ethylene vinyl acetate, the content of ethylene vinyl acetate may be 20 to 40% by weight, in this case, when used as a binder has the advantage of excellent breathability have.

As the polypropylene resin, propylene homopolymer (homopolymer), propylene-ethylene copolymer (copolymer) and the like can be used, but it is preferable to use a propylene-ethylene copolymer due to problems such as flexibility and adhesion to the resin. Do. In addition, as the chlorinated polypropylene (CPP, chlorinated polypropylene) in which the chlorine group is introduced into the polypropylene, the molecular weight (Mw) is preferably in the range of 100,000 to 260,000, and the amount of chlorine introduced is in the range of 20 to 40%. It is more preferable that it is the range of the molecular weight 100,000 * -150,000 and the amount of chlorine introduced 25 to 35%.

As the ethylene vinyl acetate (EVA) resin, a melt index (ASTM D1238: 190 ° C under 2.16 kg load condition) of 1 to 15 g / min and a vinyl acetate (VA) content of 5 to 30% are used. desirable. More preferred are those having a melt index of 7 to 15 g / min and a vinyl acetate content of 15 to 25%.

 As the emulsifier used in the preparation of the binder, polyethylene wax-based, polyoxyethylene fatty amine-based, etc. may be used, and it is preferable to use in the range of 0.1 to 5 wt%, more preferably 1 to 2 wt-polyoxyethylene fatty amine-based. It is used in the% range.

The coating composition of the present invention may further contain a blowing agent in addition to the modified zeolite and the binder, depending on the application purpose and the target substrate. The blowing agent is preferably contained in an amount of 1 to 5% by weight based on the total weight of the coating composition, in order to exhibit proper foaming performance. As the blowing agent, an aqueous blowing agent such as an oleic acid-based blowing agent, isobutane or normalpentane, and an aqueous resin blowing agent such as an acrylonitrile copolymer of isobutane or isopentane or a vinylidene chloride arylonitrile copolymer may be used. Silver is preferably used in the range of 0.5 to 25 wt%. It is more preferable to use a resin-based aqueous foaming agent in terms of compatibility with the EVA constituting the breathable binder, it is used in the range of 1 ~ 5wt% to maximize the breathability.

The building interior material to which the coating composition of the present invention is applied has excellent adsorption, removal and deodorizing power for both polar and nonpolar pollutants. Building interior materials of the invention may be sheet, bulk or coalesced. In particular, the building interior material of the present invention may be a super medium or wallpaper in which the coating composition is applied to a nonwoven fabric.

EXAMPLE

Hereinafter, the present invention will be described in more detail with reference to Examples. However, these examples are only for illustrating the present invention, and the scope of the present invention is not limited by these examples.

I. Modification of Zeolite

Example 1 Modification of Natural Zeolites (Ag-)

A natural zeolite powder having a clinoptilolite structure (200 mesh, manufactured by Dongshin) was used, 5 g of the zeolite powder was added to 100 ml of an aqueous solution of 1.37 × 10 ⁻³ M AgNO ₃ , and stirred for 24 hours, followed by magnetic stirrer. The filter was filtered and dried in an oven at 100 ° C. for 12 hours to obtain a modified zeolite modified with Ag. The obtained modified zeolite was ground to obtain a modified zeolite powder having an average particle size of about 10 μm.

Example 2. Modification of Natural Zeolites (H-)

200 g of natural zeolite having a clinoptilolite structure (200 mesh, manufactured by Dongshin) was added to 1 L of 1M NH 4 Cl, and stirred for 12 hours, followed by filtration with a filter. Wash three times with 3-5 L water to remove excess salt. Thereafter, the mixture was dried in an oven at 100 ° C. for 12 hours and finally heat treated at 450 ° C. to remove structural ammonia to obtain a modified zeolite modified with hydrogen. The obtained modified zeolite was ground to obtain a modified zeolite powder having an average particle size of about 10 μm.

Example 3. Modification of Natural Zeolites (Ag / H)

After preparing H-type zeolite modified with hydrogen as in Example 2, 5 g of the prepared H-Type zeolite was supported in 100 ml of an aqueous 1.37 × 10 ⁻³ M AgNO ₃ solution as in Example 1, and then 100 ° C. Drying in an oven for 12 hours yielded an Ag / H modified modified zeolite. The obtained modified zeolite was ground to obtain a modified zeolite powder having an average particle size of about 10 μm.

Example 4. Modification of Natural / Modified Zeolites (+ Photocatalyst Application)

A TiO2 slurry was prepared to achieve a reversible reaction of adsorption and decomposition of contaminants (P-25, Degussa). Natural zeolite powder having a clinoptilolite structure (200 mesh, manufactured by Dongshin) and modified zeolite powders of Examples 1 to 3 were mixed in a TiO 2 dispersion (1, 2, 3 wt%) and 5: 5 by mass ratio, respectively. After milling at 200 rpm, the resultant was dried and pulverized at 100 ° C. to obtain a multi-functional zeolite powder modified with TiO 2 having an average particle size of about 10 μm. 1 shows a cross-sectional view of zeolite modified with TiO 2.

Energy dispersive X-ray spectrometer (EDS, Quest Level 2, Noran Instruments Inc.) element line scan analysis showed that TiO2 was evenly dispersed on the surface of zeolite particles.

Experimental Example  - Reforming  Performance and check

The deodorizing performance and the photocatalytic ability of the natural zeolite and the modified zeolites prepared in Examples 1 to 4 were compared.

Experimental Example 1. Evaluation of deodorization rate

Natural Zeolite Powder 2L hermetically sealed chamber containing 10 × 10 cm when the modified zeolite powder prepared in Examples 1 to 4 above, or 1 g of bulk sample mixed with a urethane binder, or a fibrous sample applied to a polypropylene nonwoven fabric. Insert a harmful gas source using a micro sylinge into the chamber, and measure the change in concentration according to a certain time using a detector tube gas concentration meter (GASTEC), and compare it with a blank state without specimens. The deodorization rate of was evaluated and compared between samples. As the noxious gas, ammonia, benzene, and formaldehyde were used. The results of using the fibrous sample are shown in FIGS. 2A to 2C, and the results for Example 4 mean the results for the modified zeolite in which the composite ion-exchange zeolite of Example 3 was modified with a TiO 2 (3%) dispersion. do. As can be seen in Figures 2a to 2c, for the ammonia gas was maintained a similar high deodorization rate before reforming, and for formaldehyde or benzene showed a significant improvement in deodorization rate after reforming compared to before reforming.

Experimental Example 2 Evaluation of Photocatalyst Performance

Using a Tedler gas bag for preparing test gas, acetaldehyde standard gas (approximately 6,000 ppm) was diluted with normal air to prepare an acetaldehyde concentration of 80-100 ppm. Natural zeolite powder, natural zeolite powder modified with TiO 2 (3%) prepared in Example 4 and TiO 2 (3%) slurry mixed with Ag / H-zeolite prepared in Example 4, each modified zeolite powder 1 g was uniformly dispersed in a glass container (area <100 ± 2 cm 2), irradiated with ultraviolet rays (1.0 mW / cm) for at least 3 hours, and then cooled to room temperature. The obtained sample was placed in a test gas bag and sealed, and then 3L of acetaldehyde gas prepared at 80 to 100 ppm was injected, and then irradiated with ultraviolet rays for 30 minutes, and the concentration was checked by a gas detector tube (GASTEC).

Acetaldehyde deodorization test under UV irradiation conditions    Deodorization rate (%) Before UV irradiation After UV irradiation Natural zeolite 38 35 Natural zeolite + TiO2 (3%) 35 73 Ag / H-zeolite + TiO 2 (3%) 50 82

From the above results, the decomposition rate of acetaldehyde was much increased when irradiated with UV, and when it was modified with a photocatalyst, the deodorizing power was increased, and as a result, a powder with a photocatalytic effect was confirmed.

II . Modified  Zeolite Sheet  Application to interior materials

Example 5. Preparation of Binder

The manufacturing process of the specific binder of this invention is as follows. 30 wt% of chlorinated polypropylene (CPP) was dissolved in a solvent mixed with 80% of xylene and 20% of MEK to prepare a CPP solution. The polyoxyethylene fatty amine was used as an emulsifier while diluting 50% with water. The mixture was mixed in a range of 1 to 2 wt%, boiled at 60 ° C. for 180 minutes, and mixed in emulsion. The CPP emulsion prepared as described above was mixed with 8-30 wt% of EVA (ethylne vinyl acetate) to prepare a breathable binder. If the CPP emulsion is mixed in the EVA at less than 8 wt%, it may cause the durability problem in the final product due to the decrease in adhesion to the substrate. If the CPP emulsion exceeds 30 wt%, the physical properties of the existing resin may be degraded and the workability may be caused. do.

Binders such as acrylic, PVC, EVA, and the like commonly used have been observed to cover the surface of the zeolite, resulting in a decrease in the deodorizing functionality of the original material. Therefore, in this study, for the purpose of preserving the deodorizing performance of the zeolite, to increase the air permeability of the binder as in this embodiment, or to apply some blowing agent to improve the surface exposure of the zeolite. The porosity of the binder prepared in Example 5 was compared by nitrogen adsorption and desorption characteristics (see FIG. 3). The modified zeolite of the present invention was mixed with a predetermined amount of binder to prepare a bulk specimen, and the change in nitrogen gas adsorption and desorption amount according to the type of binder is shown in FIG. 3. As can be seen in Figure 3, when using the binder prepared in Example 5, it showed a higher adsorption amount than when using a conventional binder added 3-5% blowing agent.

Example 6 Preparation of Sheet Interior Material Applying Modified Zeolite and Binder

The manufacturing process of the modified zeolite application sheet according to the binder of the present embodiment is as follows. 60 parts by weight of one of the acryl, EVA, EVA + foaming agent (additional 1-3 wt%) and the functional breathable binder (EVA + CPP) prepared in Example 5 was selected, diluted 10-50% with water, and carried out. 40 parts by weight of natural or modified zeolites prepared in Examples 1 to 4 were mixed with a ball mill for 12 hours to prepare a coating liquid composed of a multifunctional material. 1-5 weight% of resin type foaming agents were added here, and it stirred again at 200 rpm uniformly. The stirred coating solution was coated on a polypropylene nonwoven fabric to a thickness of 120 μm using a bar coater. In order to observe the change in specific surface area, 1 g of the sample was weighed to prepare a spherical specimen, and dried at 300 ° C. for 24 hours to observe nitrogen adsorption and desorption behavior (see FIGS. 2A to 2C). A fiber coating solution was prepared by mixing and applying it to the fiber, and the result was estimated to reduce the effect of blocking the pores of the zeolite depending on the binder selection. The nitrogen isothermal adsorption curves of the zeolite-binder mixing pellets according to the type of binder as shown in FIG. 3 showed the highest adsorption amount of the CPP + EVA binder. In addition, compared with carbon, other minerals, or pre-modified natural zeolite, the modified zeolite-treated fiber showed a relatively high deodorization rate, especially in the case of wallpaper-integrated ammonia, benzene, formaldehyde, respectively, 99.9%, 87%, The highest value was 94.6% (see FIGS. 4A-4C).

Example 7 Preparation of Bulk Interior Materials

50 parts by weight of a urethane binder, 50 to 100 parts by weight of the modified zeolite / activated carbon of the present invention, 50 parts by weight of a curing agent, 1 to 3 parts by weight of glass fiber, and <0.5 parts by weight of silicone oil, and 0.3 to 1 catalyst By weight, 0.5 to 5 parts by weight of the blowing agent was added, followed by secondary mixing, poured into a mold, dried at room temperature, and cut into desired shapes to obtain a bulk interior material.

Bulk interior material obtained in the present invention is an interior material of the flame-retardant grade level 2 to 3, has a compressive strength (400-600kgf / cm ²⁾ is similar to the gypsum board, has a significantly better heat resistance as compared with foam, excellent in the surface of the ammonia talchwiyul (33.3% gypsum board, bulk interior material of the present invention: 60%).

In addition to the sheet type interior material and the bulk interior material by applying the modified zeolite of the present invention in Examples 6 and 7, the following composite (integrated) interior material can also be prepared by applying the modified zeolite:

-Sheet Interior + Wallpaper

-Sheet Interior + Bulk Interior

-Sheet-like interior materials + Sheet-like interior materials mixed (multilayer interior materials)

 In particular, the one-piece integration with wallpaper makes it possible to construct separate one-time medium and wallpaper finishing work in one time, which can be applied as a convenient product.

The modified zeolite of the present invention has an excellent adsorption and removal ability for indoor air pollutants, and has the advantage of being able to remove polar and nonpolar pollutants simultaneously. Therefore, the modified zeolite of the present invention can be applied to various building interior materials to solve the problem of sick house syndrome.

Claims (12)

A modified zeolite of natural zeolite, wherein the modified zeolite is modified alone or in complex ion exchange by at least one selected from the group consisting of hydrogen and precious metal materials. The method of claim 1, wherein the modified zeolite is further modified by a photocatalyst, the precious metal material is selected from the group consisting of Ag, Au and Pt, the photocatalyst is selected from the group consisting of TiO2 and ZnO, CdS, Perovskite Modified zeolite. An air quality improver having good adsorption, removal and deodorizing power for both polar and nonpolar pollutants, containing the modified zeolite according to claim 1. A method of improving air quality comprising adsorbing, decomposing and removing polar pollutants, nonpolar pollutants or both in air using the modified zeolite according to claim 1. Modified zeolite according to claim 1 or 2; And At least one binder selected from the group consisting of acryl, polyvinyl chloride (PVC), polypropylene (PP), polypropylene chloride (CPP) and ethylene vinyl acetate (EVA) A coating composition containing a content ratio of 4: 6 to 6: 4 (weight of modified zeolite: weight of binder). The coating composition according to claim 5, wherein the binder is a mixture containing polypropylene chloride (CPP) and ethylene vinyl acetate (EVA), and the content of ethylene vinyl acetate is 20 to 40% by weight and excellent in breathability. The coating composition according to claim 5, further comprising 1 to 5% by weight of blowing agent. The coating composition according to claim 6, further comprising 1 to 5% by weight of blowing agent. A sheet, bulk or coalesced building interior material, to which the coating composition according to claim 5 is applied and which has excellent adsorption, removal and deodorizing power for both polar and nonpolar contaminants. A sheet-like, bulk- or coalesced building interior material, to which the coating composition according to claim 6 is applied, and which has excellent adsorption, removal and deodorizing power for both polar and nonpolar contaminants. A sheet-like, bulk- or coalesced building interior material, to which the coating composition according to claim 7 is applied and which has excellent adsorption, removal and deodorizing power for both polar and nonpolar contaminants. A sheet-like, bulk- or coalesced building interior material, to which the coating composition according to claim 8 is applied, and which has excellent adsorption, removal and deodorizing power for both polar and nonpolar pollutants.

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