JPS6347440A - Interior material for building - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry A] The present invention relates to a building interior material coated with a paint for preventing wall condensation.

[Conventional technology] Conventionally, to prevent condensation on the walls of buildings, insulation materials such as glass wool, rock wool, or foamed synthetic resin boards are placed between the exterior and interior walls to improve insulation and prevent condensation. In the case of concrete building structures, there are technologies that prevent condensation by attaching a foamed synthetic resin board to the inner surface of the formwork and pouring the concrete, and using a structure that integrates concrete and insulation material to prevent condensation. Additionally, in order to prevent moisture from entering the concrete itself, there are measures such as adding and mixing a water repellent such as stearate and pouring it.

There are no known improvement techniques for preventing dew condensation in existing concrete buildings.

[Problems to be Solved by the Invention] As described above, as a measure to prevent condensation on indoor walls, there is a technology that prevents dew condensation by inserting a heat insulating material between the outer wall and the inner wall to prevent a drop in the indoor wall surface temperature and prevent the occurrence of condensation. Although this is more effective than not using any insulation material at all, it is not a perfect solution. In other words, although the occurrence of dew condensation on the inner wall surface is reduced, there is a space layer between the outer wall and the insulation material, and although there is no condensation on the inner wall surface, there is a space layer between the outer wall and the insulation material. Condensation is occurring. The reason for this is thought to be that the wall and the heat insulating material are not in close contact with each other and a space layer exists. In order to solve this problem, it is necessary to bond the wall surface and the insulation material closely and to increase the thickness of the insulation layer, which not only imposes structural constraints but also becomes economically expensive. Become.

In addition, in the case of concrete buildings, it has recently been proposed to add and mix water repellents such as stearate before pouring, but the chemical stability of water repellents such as stearate itself There are problems with this and it has not been put into practical use.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present inventors conducted intensive research on the development of an inexpensive and effective anti-condensation material, and as a result, developed a new paste-like paint. The present invention uses a wall condensation prevention paint that is effective for preventing dew condensation by coating the wall surface, and also absorbs and desorbs moisture according to changes in the surrounding humidity environment to naturally control indoor humidity. It provides interior materials.

The architectural interior material of the present invention comprises a coating component containing an organic or inorganic color vehicle, an extender, a diluent, an alkaline chemical, and a fungicide, a super water-absorbing resin powder or 1B fiber, and a hygroscopic fine powder. A paint consisting of a solid component containing perlite and finely divided zeolite is coated on the surface of an interior substrate, or a breathable wallpaper is further adhered to the coated surface.

Further, in a preferred embodiment of the present invention, it is preferable that the amount of the fine pearlite and the fine zeolite added is within the range of 10 to 40% by weight, and the mixing ratio of the fine pearlite and the fine zeolite is 1.5% by weight. :1 to 5:1 is preferable. Further, the content of the super absorbent resin is preferably in the range of 0.01 to 2.0% by weight. In the present invention, weight % refers to a weight ratio excluding a diluent described below.

In the present invention, among the paint components, organic or inorganic color vehicles include milk casein, soybean casein, glue, gelatin, fluff, wheat flour, methyl cellulose, vinyl acetate powder, water-soluble synthetic resins, sodium silicate,
One selected from known coloring materials such as potassium silicate may be used, and methyl cellulose is particularly preferred.

Extender pigments include chalk, heavy calcium carbonate, light calcium carbonate, dung, palite powder, and clay.

Alkaline chemicals include slaked lime, sodium hydroxide,
Various alkaline substances such as potassium hydroxide and magnesium hydroxide are used.

In addition to water, alcohols, various organic solvents, and the like can be used as the diluent. In this case, select a diluent that is compatible with the vehicle. Note that various antifoaming agents such as silicone-based antifoaming agents can be added to the diluent if necessary.

An alkaline agent such as slaked lime is used as a dissolving agent in the above-mentioned color vehicle, and if necessary, an antifoaming agent may also be used in combination.

For example, if methylcellulose is selected as the color vehicle,
When water is used as a diluent to form a 2% by weight aqueous solution,
Preferably, the amount is between 50 and 80% by weight, particularly between 55 and 70% by weight. If it is less than 50% by weight, the malleability of the paint is insufficient and there are problems such as deterioration of adhesion upon moisture absorption.
Exceeding this percentage by weight is not preferable because the amount of other materials becomes too small.

As the fungicide, pentachlorophenol, sodium pentachlorophenol, parachlorometaxylenol, etc. are used, and the amount added is 0.00% relative to the content of the coloring material, diluent, extender pigment, fine perlite, and fine zeolite. 05-1.5% by weight, especially 0.2-0.5% by weight are preferred.

In the present invention, pigments may be contained in the paint components as necessary. The pigment is not particularly limited, and various pigments may be used as long as they have the required durability and fastness when used to color the interior material coating layer. In the present invention, this pigment is not particularly required when wallpaper is provided on the surface.

Among the solid components, as the superabsorbent resin, one having a main chain of polysaccharide and side chains of sodium polyacrylate and polyacrylic acid is preferably used. This super absorbent resin has the effect of increasing the hygroscopicity of the paint. The blending amount of the super absorbent resin is 0.01 to 2.0% by weight,
Particularly suitable is 0.01 to 0.1% by weight. 0.01i
If the amount is less than 3%, no effect will be seen, and if it is added more than 2.0% by weight, the swelling of the super absorbent resin due to moisture absorption will appear as an adverse effect on the coating film, causing unevenness in the coating film.
It impairs the strength and aesthetics of the paint film.

The total amount of hygroscopic fine pearlite and fine zeolite is preferably 10 to 40% by weight, more preferably 11% by weight.
~20% by weight. If it is less than 10% by weight, the ability to absorb moisture is small and it is not economical, and if it exceeds 40% by weight, painting becomes difficult and workability is poor, and there is a risk that the paint will run down when absorbing moisture. The mixing ratio of fine pearlite and zeolite is 1.5:1 to 5:1, preferably 2:1.
~3:1. Fine powder pearlite has a specific surface area of 2.5r.
d1g, the fine powder zeolite preferably has a specific surface area of around 25rn'/g.

The above-mentioned organic or inorganic color vehicles, extender pigments, alkaline chemicals, diluents, and fungicides, as well as paint components containing further pigments as needed, powdered or fibrous superabsorbent resin, and hygroscopic fine powder. Applying a paste-like paint obtained by sufficiently uniformly adding and mixing pearlite and a solid component containing finely powdered zeolite onto the surface of a base material to a thickness of about 1 to 5 mm, for example, with a brush or trowel. Accordingly, the interior material of the present invention is provided which is highly effective in preventing the occurrence of dew condensation.

In addition, this base material includes veneer, slate, calcium silicate board, lightweight cement board, gypsum board, etc.
Various types of plate materials can be used.

In the present invention, when a breathable wallpaper is attached to the painted surface, the breathable wallpaper includes: (1) A vent hole of a size that does not impair the aesthetic appearance of a typical synthetic resin film such as vinyl chloride, for example. Films with needle holes ■ Films whose material itself is breathable ■ Meshes made of various materials, etc. Wallpaper can be easily pasted on the painted surface by pressing it with a roll or the like after painting. Note that a known adhesive may be used for pasting the wallpaper, if necessary.

In the present invention, coating the base material with the paint and pasting the wallpaper on the base material is performed on a building material production line, and the product is shipped after the paint dries.

[Function] One of the differences between the dew condensation prevention paint applied to the base material of the interior material of the present invention from general paints is that it contains a solid component containing a super absorbent resin, finely divided perlite, and finely divided zeolite. It's in being.

That is, since fine powder pearlite and fine powder zeolite have a shell structure without micropores, they have a respiration effect, inhale moisture from the atmosphere, and release the absorbed moisture when drying. When an interior material using this paint is applied to an inner wall surface, due to the breathing effect of this paint, indoor moisture is absorbed into the paint film without forming dew condensation on the wall surface.

Therefore, the interior material of the present invention hardly causes dew condensation even when the temperature falls below the dew point.

Further, by adding a small amount of super absorbent resin, the above-mentioned moisture absorption effect is improved by, for example, about 20 to 50%, and dew condensation is more reliably prevented.

It should be noted that perlite alone has a large moisture absorbing and releasing property, and when it is made into a paint, the fluidity, coating properties, and workability of the paint deteriorate. On the other hand, if zeolite is used alone, the paint becomes hard and is less suitable as a paint. By using pearlite and zeolite in a mixture, preferably in the above-mentioned ratio, suitable moisture absorbing and releasing properties are maintained and properties suitable as a paint are maintained.

Methylcellulose, which is used as a color vehicle, works effectively to improve the adhesion of paints, and methylcellulose, which is sparingly soluble, can be dissolved by adding an alkaline agent.

In addition, by pasting breathable wallpaper on the painted surface of such wall condensation prevention paint, various colors and patterns can be easily applied as interior decoration materials without impairing the dew condensation prevention effect. , its aesthetic appearance can be greatly improved.

[Example] Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the following Examples unless the gist thereof is exceeded.

Example 1.2, Comparative Example 1 The laboratory was divided into an indoor side and an outdoor side using a 2 mm thick glass plate, and the indoor side was kept at 25°C and relative humidity 80%, and the outdoor side was kept at 0°C.
It was set to

In the above laboratory, when the glass walls were untreated, condensation occurred on the indoor surface within one minute, and droplets flowed down the glass surface.

On the other hand, methyl cellulose (2% liquid) was used as a color vehicle, calcium carbonate was used as an extender, titanium oxide was used as a white pigment, slaked lime was used as an alkali agent, and antifoaming agents, pearlite, and zeolite were added in the proportions shown in Table 1. The three types of paints obtained by mixing were applied to a plywood board to a thickness of 1 mm to produce an interior material. The finish of the coating film and the condition of the coating film after application were as shown in Table 1.

When each of these interior materials was installed on the glass plate surface on the indoor side in the above-mentioned laboratory, no condensation occurred on the surface even after 3 hours or more, and the adhesion strength of the coating film was good. . Table 1 shows the state of the coating film upon moisture absorption.

Table 1 also shows the moisture absorption rate (the percentage obtained by dividing the amount of water absorbed at saturation by the weight of the paint when dry). From Table 1, it is clear that the water absorption rate of the examples is much higher than that of the comparative examples. In addition, in Example 2, the blending amount of the super absorbent resin was large and foam-like substances were generated, and the super absorbent resin was 0.1
It has been found that it is particularly suitable to incorporate less than 5% by weight.

Example 3 A vinyl chloride film with needle holes was pasted as breathable wallpaper on the painted surface formed in Example 1, and a moisture absorption test was conducted in the same manner to examine the occurrence of dew condensation.

As a result, no dew condensation was observed in the case of Example 1 and the studs even after 3 hours, confirming that the interior material of the present invention has a good dew condensation prevention effect.

[Effects of the Invention As described above, the interior material of the present invention has almost no occurrence of dew condensation.
It is also possible to prevent condensation in existing concrete buildings, which is a problem for new concrete buildings and for which there is no solution at all. Of course, the interior material of the present invention can also be used for wooden houses. In addition, it is inexpensive and has good workability.

In particular, in the case of pasted wallpaper, the desired color,
It can also be patterned, making it extremely excellent as an interior material from an aesthetic point of view.

Claims (1)

[Scope of Claims] (1) Paint components containing organic or inorganic color vehicles, extender pigments, alkaline chemicals, diluents, and fungicides, and powdered or fibrous high An architectural interior material characterized by being coated with a wall condensation prevention paint consisting of a solid component containing a water-absorbing resin, a hygroscopic fine perlite powder, and a fine powder zeolite. (2) The architectural interior material according to claim 1, wherein the paint component further contains a pigment. (3) Addition amount of fine pearlite and fine zeolite is 1
Architectural interior material according to claim 1 or 2, characterized in that the content is in the range of 0 to 40% by weight. (4) The mixing ratio of fine pearlite and fine zeolite is within the range of 1.5:1 to 5:1, according to any one of claims 1 to 3. architectural interior materials. (5) The architectural interior material according to any one of claims 1 to 4, characterized in that the content of the super absorbent resin is 0.01 to 2.0% by weight. . (6) Paint components containing organic or inorganic color vehicles, extender pigments, alkaline chemicals, diluents, and fungicides, powdered or fibrous superabsorbent resins, and hygroscopic 1. An architectural interior material, characterized in that the wall surface is coated with a wall condensation prevention paint consisting of a solid component containing finely powdered perlite and finely powdered zeolite, and a breathable wallpaper is pasted on the coated surface.