KR100651080B1 - Composition for inorganic mortar having a humidity controling performance - Google Patents

Abstract

Provided is an inorganic coating composition having humidity-controlling property, which is easily applied onto a surface requiring adaptability to humidity, has excellent humidity-controlling property, deodorizing activity, flame resistance, adhesion maintenance and antibacterial property, and causes no surface cracking. The inorganic coating composition having humidity-controlling property comprises: 100 parts by weight of a humidity-controlling agent, which is at least one selected from the group consisting of silica gel, zeolite and calcium silicate and has an average particle size of 150-700 micrometers; 10-45 parts by weight of at least one resin binder selected from ethylene-vinyl acetate copolymers, styrene-acrylate copolymers and polyvinyl alcohol; 70-200 parts by weight of at least one inorganic binder selected from lime and calcium silicate; and 100-200 parts by weight of water.

Description

Inorganic coating material composition having humidity control {COMPOSITION FOR INORGANIC MORTAR HAVING A HUMIDITY CONTROLING PERFORMANCE}

[Industrial use]

The present invention relates to an inorganic coating material composition, and more particularly, to a slurry-like inorganic coating material composition having humidity control, such as a storage cabinet that displays and stores cultural properties and artifacts. The present invention relates to an inorganic coating material composition which can be applied to a wall surface of a space where a) is required.

[Prior art]

Storage and storage of cultural assets and relics should be kept at a constant temperature and humidity conditions to keep their collections intact over a long period of time. desirable.

Therefore, museums and exhibition halls maintain a constant temperature and humidity by using a mechanical air conditioning system that installs an air conditioner inside. In order to keep the inside of the cabinet at the same temperature and humidity, the air conditioner must be operated 24 hours a day, and as the burden of the air conditioner operation cost increases, most of the air conditioners are operated by stopping and operating the air conditioner at regular intervals. .

However, if the air conditioner is shut down or malfunctions, the temperature and humidity environment inside the cabinet changes drastically.

In consideration of the above problems, museums, exhibition halls, etc. are finished with a humidity control panel to close the inside wall of the cabinet so as to buffer a sudden change in temperature and humidity during an air conditioner downtime.

The humidity control panel has a characteristic of absorbing moisture when the humidity of the storage space is high and re-emitting moisture absorbed when the humidity is low. Examples of the humidity panel used in the prior art include a wooden humidity control panel having a humidity control such as paulownia, cedar, and wood fiber-based humidity control panel, which is crushed and molded by pulverizing the wood and then mixed with a humidity control component.

While the humidity control panel has excellent performance of absorbing or releasing moisture, it has a disadvantage in that it burns very well in case of fire, and it is troublesome to rework the panel according to the space when it is installed on the inner wall of the cabinet. Because of the need to construct using chemicals such as binders, harmful gases such as volatile organic compounds are generated after construction.

In view of the problems of the prior art as described above, an object of the present invention is to provide a slurry-like inorganic coating material composition having humidity control, which can be easily applied to a space where humidity compliance is required without additional reprocessing. It is possible to provide an inorganic coating material composition capable of controlling humidity, deodorizing performance of harmful gases, excellent flame retardancy and antibacterial property, and excellent adhesive holding power (coating property) when applied, and preventing surface cracking after drying.

In order to achieve the above object, the present invention

Humectants selected from the group consisting of silica gel, zeolite and calcium silicate,

Per 100 parts by weight of the humectant,

10 to 45 parts by weight of a resin binder selected from the group consisting of ethylene-vinylacetate copolymer, styrene-acrylate copolymer and polyvinyl alcohol;

70 to 200 parts by weight of an inorganic binder selected from the group consisting of limestone and calcium silicate; And

100 to 200 parts by weight of water

It provides an inorganic coating material composition comprising a.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The inventors of the present invention, in the course of repeating the study on the moisture-repellent finish, it is easy to construct when manufacturing the moisture-repellent finish in the slurry (slurry) composition, in particular in the case of introducing a resin binder and an inorganic binder in the coating material composition Even when a moisturizer having an average particle size was used, it was confirmed that the adhesive holding force (coating property) was excellent in coating and prevented surface cracking after drying, thereby completing the present invention.

The coating material composition of the present invention is excellent in flame retardancy according to the use of the inorganic component, and can be easily applied to the wall surface or the surface of the building interior material where humidity compliance is required as the formulation is slurry. It has the advantage of excellent performance, noxious gas deodorizing performance, and antibacterial properties.

The inorganic coating material composition according to the present invention includes a humectant, a resin binder, an inorganic binder, and water.

In the coating material composition of the present invention, the humectant is a component for imparting moisture and deodorizing ability to the scouring material composition, and it is possible to maintain the equilibrium of humidity in the storage room or the exhibition room by the hygroscopic or moistureproof action of the humectant. It is possible to deodorize harmful gases such as formaldehyde and ammonia by deodorization.

The humectant may use a humectant commonly used in the art to which the present invention belongs, and preferably, one or more selected from the group consisting of silica gel, zeolite and calcium silicate may be used.

The humectant is preferably an average particle size of 150 to 700 ㎛, more preferably 200 to 600 ㎛ can be used. In other words, the smaller the average particle size, the better the humidity and deodorizing ability, but the higher the production cost is not economical it is preferable to use a particle size of 150 ㎛ or more. On the other hand, the moisturizing agent lowers the production cost as the average particle size is larger, but it is preferable to use a particle size of 700 μm or less since the humidity control ability is reduced and the surface may be roughened or cracked after construction.

When the silica gel is used in the humectant, A-type (A-type: narrow pore silica gel) or B-type (B-type: wide pore silica gel) may be used, and among them, B-type silica gel may be used. More preferred.

The A-type silica gel has a small pore size and a large specific surface area, and the B-type silica gel has a large pore size and a small specific surface area as compared to the A-type, and as shown in Table 1, the B-type silica gel Since the basic moisture absorption and moisture resistance is excellent and the difference between the moisture absorption rate and the moisture absorption rate is small, not only the absorption of moisture but also an excellent moisture resistance can be exhibited when the surrounding environment is low.

division 20% relative humidity 50% relative humidity Hygroscopicity (%) Moisture proof rate (%) Hygroscopicity (%) Moisture proof rate (%) A-type silica gel 10.8 13.6 25.9 2.5 B-type silica gel 5.3 30.6 14.7 14.0

In the coating material composition of the present invention, the resin binder is added as a component added to improve the bonding strength between the components of the coating material composition, the adhesion holding force (coating property), and the surface strength after drying, the use of the resin binder Therefore, even if the use of a large particle size moisturizer has the effect of preventing the surface cracking after construction.

The resin binder is preferably a formaldehyde emission of less than 0.1 mg / L, more preferably at least one selected from the group consisting of ethylene vinyl acetate (EVA) copolymer, styrene acrylate copolymer and polyvinyl alcohol. Can be used.

In addition, the resin binder preferably has a molecular weight of 1,000 to 72,000. That is, the molecular weight of the resin binder is preferably 1,000 or more in consideration of the minimum adhesion holding force and the surface strength after drying, and the molecular weight of the resin binder is 72,000 or less in order to minimize the volume change (shrinkage) of the composition according to the increase in molecular weight It is preferable.

The content of the resin binder is preferably included in 10 to 45 parts by weight based on 100 parts by weight of the humectant. That is, the content of the resin binder is preferably 10 parts by weight or more with respect to 100 parts by weight of the humectant in consideration of the minimum adhesion holding force during application, surface strength after drying, brittleness of the edge portion, and surface burying, etc., excessive addition In order to prevent the deterioration of humidity control according to the present invention, the amount is preferably 45 parts by weight or less.

In the coating material composition of the present invention, the inorganic binder is a component added to improve the adhesive holding force (coating property) and the surface strength after drying together with the resin binder when the coating material composition is applied.

The inorganic binder is preferably selected from one or more of the group consisting of limestone and calcium silicate. Among these, the calcium silicate may be used as the above-mentioned humectant because it is used as an inorganic binder and at the same time has a humectant ability.

The content of the inorganic binder is preferably included in 70 to 200 parts by weight based on 100 parts by weight of the humectant. That is, the content of the inorganic binder is preferably 70 parts by weight or more with respect to 100 parts by weight of the humectant in consideration of the minimum adhesion holding force and surface strength during the application, to prevent the deterioration of the humidity capacity due to excessive addition, and to prevent surface cracking In order to prevent it, it is preferable that it is 200 weight part or less.

The coating material composition according to the invention also comprises water. At this time, the water content is preferably included in 100 to 200 parts by weight based on 100 parts by weight of the humectant. The content range of the water can be determined in consideration of the adhesive holding force (correctiveness) during the application of the composition, it can be used by additionally added depending on the construction conditions and construction method when construction.

On the other hand, the coating material composition of the present invention may further include an additive selected from the group consisting of pigments, antibacterial agents, fragrances and humidity indicators (moisture indicator).

Among the additives, the pigment is a component that can be added to impart a visual effect to the coating material composition, and the kind thereof may be selected and used according to the color desired in the art. For example, the pigment may be at least one selected from the group consisting of diatomaceous earth, geumgangsa, ocher and mica, the content of which is 3 to 10 parts by weight based on 100 parts by weight of the humectant in consideration of minimal visual effects and economics It is preferably included in parts by weight.

Among the additives, the antimicrobial agent may be added to the antimicrobial agent such as antifungal properties to the coating material composition, and the kind thereof may be selected and used conventionally in the art. For example, the antimicrobial agent may be selected from the group consisting of titanium dioxide (TiO ₂ ) and silver (Ag) particles (preferably particles having an average particle size of 0.005 to 0.015 μm), the content of which is In consideration of the minimum antimicrobial effect and economical efficiency it is preferably included 1 to 3 parts by weight based on 100 parts by weight of the humectant.

Among the additives, the fragrance is a component that can be added to impart fragrance to the coating material composition, and in particular, when the composition of the present invention is used as an interior finishing material. The type of the fragrance may be selected and used as conventional in the art to which the present invention belongs, and preferably may be selected and used herb flavors such as pine needles, tea, lavender, rosemary, peppermint. It is preferable that the content of the fragrance is included in an amount of 0.1 to 1 parts by weight based on 100 parts by weight of the humectant in consideration of minimal fragrance and economy.

The humidity indicator of the additives (moisture indicator) is a component that can be added to make it possible to visually check the humidity of the space in which the coating material composition was constructed. For example, the humidity indicator may be selected from the group consisting of cobalt chloride (CoCl ₂ ), cobalt bromide (CoBr ₂ ), cobalt iodide (CoI ₂ ) and barium chloride (BaCl ₂ ), and The content is preferably included in 3 to 10 parts by weight based on 100 parts by weight of the humectant in consideration of the minimum humidity indicating effect and economical efficiency.

The coating material composition of the present invention as described above can be constructed as a finishing material (Finishing material) in a space where humidity adaptability (adaptability) is required, such as a storage room (收藏 庫) or an exhibition room for storing the cultural property. In addition, the coating material composition of the present invention may be applied as interior finishing materials or environmentally friendly finishing materials of various buildings by adding pigments, antimicrobial agents and fragrances as necessary, in addition to food storage warehouses and various exhibition halls.

At this time, the wall thickness of the spaces or the surface of the building interior materials are preferably dried thickness of 1 to 5 mm using a trowel, a roller, a spray gun, etc. After applying uniformly to be, it can be constructed by curing at room temperature (25 ℃) for 12 hours to 48 hours.

Hereinafter, examples and comparative examples are presented to help understand the present invention. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited to the following examples.

Example  One

2,400 g of silica gel (B-type, average particle size 300 µm) as a humectant; 396 g of ethylene vinyl acetate (EVA) copolymer and 120 g of styrene acrylate copolymer as resin binders; 4,512 g of limestone as an inorganic binder; And 3312 g of water was uniformly mixed to prepare a coating material composition.

Example  2

It was prepared in the same composition as in Example 1, except that 2,400 g of silica gel (B-type, average particle size 500 μm) was used as a humectant.

Example  3

It was prepared in the same composition as in Example 1 except that 2,400 g of zeolite (average particle size 500 μm) was used as the humectant.

Example  4

It was prepared in the same composition as in Example 1 except that 2,400 g of calcium silicate (average particle size 500 μm) was used as the humectant.

Example  5

A coating material composition was prepared in the same composition as in Example 1, except that 120 g of ocher, which is a pigment, was further added.

Example  6

A coating material composition was prepared in the same composition as in Example 1 except that 100 g of titanium dioxide (TiO ₂ ), which is an antimicrobial agent, was further added.

Example  7

A coating material composition was prepared in the same composition as in Example 1 except that 120 g of cobalt chloride, which is a humidity indicator, was further added.

Comparative example  One

It was manufactured in the same composition as in Example 1 except that no resin binder was used.

Comparative example  2

336 g of an ethylene vinyl acetate copolymer was used as the resin binder, and the same composition as in Example 1 was used except that no inorganic binder was used.

Comparative example  3

Except for using 480 g of polyethylene glycol (PEG) as a resin binder was prepared in the same composition as in Example 1.

Comparative example  4

Except for using 480 g of polyvinyl acetate (PVAc) as a resin binder was prepared in the same composition as in Example 1.

Comparative example  5

As a humidity control finish for a board manufactured in a conventional fired state, 280 g of silica gel (average particle size 300 µm); Gypsum 500 g; 120 g of cement; And 1,440 g of limestone were uniformly mixed to prepare a coating material composition, which was not fired.

Example  8-11 and Comparative example  6 ~ 7

A coating material composition was prepared using the composition (unit: g) shown in Table 2 below.

division Example 8 Example 9 Comparative Example 6 Example 10 Example 11 Comparative Example 7 Silica gel 2,400 2,400 2,400 1,800 1,800 1,800 EVA resin 420 780 1,200 420 780 1,200 Calcium silicate 6,000 6,000 6,000 6,000 6,000 6,000 water 3,300 3,300 3,300 2,520 2,520 2,520 Diatomaceous earth 240 240 240 240 240 240 Titanium dioxide 120 120 120 120 120 120

[ Experimental Example ]

Moisture-absorption performance

① The composition of Example 1 was applied to a gypsum board to a dry thickness of 3 mm and cured at room temperature (25 ° C.) for 24 hours, and then the moisture absorption and moisture proof amount were measured according to JIS A 1470-1. It is shown in Table 3 below.

division Hygroscopic amount (g / ㎡) Moisture proof amount (g / ㎡) Difference in moisture absorption and moisture absorption (g / ㎡) result 269.6 262.2 7.4

② For the compositions of Examples 8 to 11 and Comparative Examples 6 to 7 was measured the moisture absorption amount and moisture proof amount in the same manner as described above, the results are shown in Table 4 below.

division Example 8 Example 9 Comparative Example 6 Example 10 Example 11 Comparative Example 7 Hygroscopic amount (g / ㎡) 178.0 176.4 160.8 150.0 150.4 137.2 Moisture proof amount (g / ㎡) 173.6 172.4 156.0 145.6 145.2 133.2

As shown in Table 4, Examples 8 and 9 it can be seen that the excellent moisture absorption and moisture resistance as the silica gel content is increased compared to Examples 10 and 11. In addition, Comparative Examples 6 and 7 were shown to be inferior in moisture absorption and moisture absorption compared to Examples 8 to 11 as the content of the resin binder exceeds the preferred range.

Hazardous Gas Deodorization Performance

Formaldehyde and ammonia gas deodorization performance of the composition prepared in Example 6 was evaluated based on KICM-FIR-1085 (Korea Institute of Construction Materials), and the results are shown in Table 5 below.

division Elapsed time (minutes) Blank concentration (ppm) Sample concentration (ppm) Deodorization rate (%)  Formaldehyde 0 81 81 - 30 78 8 89.7 60 75 7 90.7 90 72 6 91.7 120 70 5 92.9   ammonia 0 200 200 - 30 175 12 93.1 60 152 9 94.1 90 131 6 95.4 120 116 5 95.7

Antimicrobiality

The antimicrobial properties of the compositions of Examples 6 to 10 were evaluated according to KS M 5000, and the results were found to be the highest grade of the total 10 grades.

Flame retardant

The flame retardance of the compositions of Examples 1 to 10 was evaluated based on KS F 2271, and the results were found to be flame retardant class 1, which is the highest grade among flame retardant classes 1 to 3.

Correctness

The compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were applied to the gypsum board to have a dry thickness of 3 mm, and the validity was evaluated by the sensory test, and the results are shown in Table 5 below. In this case, 'good' refers to a case of maintaining a desired thickness without flowing down when applied, and 'poor' refers to a case where the surface adhesive force drops off or hardens before application.

Surface strength

The compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were applied to a gypsum board to a dry thickness of 3 mm, and the surface strength after curing at room temperature (25 ° C.) for 24 hours was evaluated by sensory tests. The results are shown in Table 6 below. At this time, when the hand is cracked, falling off, or buried, it was marked as 'bad', and if the opposite is marked as 'good'.

division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Correctness Good Good Good Good Bad Good Good Bad Bad Surface strength Good Good Good Good Bad Bad Bad Bad -

As shown in Table 6, Examples 1 to 4 included the humectant, the resin binder, the inorganic binder, and the water according to the present invention, to maintain the desired thickness without flowing down when applied, and damaged the surface after drying It did not crack, fall off, or bury when pressed.

On the other hand, in Comparative Example 1, the powder was smeared when rubbed with clothes or hands on the surface as the resin binder was not used, and the corner part was easily broken, and when pressed with a finger, it was easily broken into powder. In Comparative Example 2, the surface strength was decreased by not using an inorganic binder, and Comparative Examples 3 and 4 were inferior in physical properties when the resin binder according to the present invention was not used. In addition, Comparative Example 5 using the conventional humidity control finish composition for boards as a coating material was not suitable as a coating material because it is cured in a short time and difficult to apply.

As described above, the coating material composition according to the present invention can be easily applied to the wall surface of the space or the surface of the building interior material where humidity compliance is required as the formulation is in the form of slurry. Not only is it excellent in performance, noxious gas deodorizing performance, flame retardancy, antibacterial, it is excellent in adhesion holding power during application, and has the effect of preventing surface cracking after drying.

Claims (7)

delete Humectants having at least one selected from the group consisting of silica gel, zeolite and calcium silicate and having an average particle size of 150 to 700 µm; Per 100 parts by weight of the humectant, 10 to 45 parts by weight of a resin binder selected from the group consisting of ethylene-vinylacetate copolymer, styrene-acrylate copolymer and polyvinyl alcohol; 70 to 200 parts by weight of an inorganic binder selected from the group consisting of limestone and calcium silicate; And 100 to 200 parts by weight of water Inorganic coating material composition comprising a. The method of claim 2, The coating material composition is an inorganic coating material composition further comprises at least one additive selected from the group consisting of pigments, antibacterial agents, fragrances and humidity indicators. The method of claim 3, The pigment is one or more selected from the group consisting of diatomaceous earth, geumgangsa, ocher and mica, the content of which is contained in 3 to 10 parts by weight based on 100 parts by weight of the humectant. The method of claim 3, The antimicrobial agent is one or more selected from the group consisting of titanium dioxide (TiO ₂ ) and silver (Ag) particles, the content of which is contained in 1 to 3 parts by weight based on 100 parts by weight of the humectant. The method of claim 3, The fragrance is at least one selected from the group consisting of pine needles, tea, lavender, rosemary and peppermint flavor, the content of the inorganic coating material is included 0.1 to 1 parts by weight based on 100 parts by weight of the humectant. Composition. The method of claim 3, The humidity indicator is selected from the group consisting of cobalt chloride (CoCl ₂ ), cobalt bromide (CoBr ₂ ), cobalt iodide (CoI ₂ ) and barium chloride (BaCl ₂ ), the content is 100% by weight of the humectant 3 to 10 parts by weight with respect to the inorganic coating material composition will be included.