JPH0544502B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a building interior material coated with a paint for preventing wall condensation. [Prior Art] Conventionally, to prevent condensation on building walls, insulation materials such as glass wool, rock wool, or foamed synthetic resin boards were 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 dew condensation by attaching foamed synthetic resin boards to the inner surface of the formwork and pouring concrete, and integrating concrete and insulation materials. In addition, 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, by inserting a heat insulating material between the outer wall and the inner wall, it is possible to prevent a drop in the indoor wall surface temperature and prevent the occurrence of condensation. While this technique is more effective than not using any insulation 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, the wall surface and the insulation material should be brought into close contact.
Moreover, the thickness of the insulation layer must be increased,
It is not only structurally restricted but also economically expensive. 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 circumstances, the inventors of the present invention 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 in preventing dew condensation by coating the wall surface, and also absorbs and desorbs moisture in response to changes in the surrounding humidity environment to naturally control indoor humidity. The company provides architectural 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 powder or fiber of a highly water-absorbing resin, and a hygroscopic fine perlite powder. and a solid component containing finely powdered zeolite, which is coated on the surface of a base material for interior use, or is further coated with breathable wallpaper on the coated surface. In addition, in a preferred embodiment of the present invention, the amounts of the above-mentioned finely powdered pearlite and finely powdered zeolite added are
It is preferably within the range of 10 to 40% by weight, and the mixing ratio of fine pearlite and fine zeolite is preferably within the range of 1.5:1 to 5:1. 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, other 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, barite powder,
There are clay etc. As the alkaline chemicals, various alkaline substances such as slaked lime, sodium hydroxide, 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, when methyl cellulose is selected as a color vehicle and water is used as a diluent to make a 2% by weight aqueous solution, the amount is 50 to 80% by weight, especially 55%.
The content is preferably 70% by weight. If it is less than 50% by weight, the paint will have insufficient malleability and there will be problems such as deterioration of adhesion upon moisture absorption, and if it exceeds 80% by weight, the amount of other materials will be too small, which is undesirable. As a fungicide, pentachlorophenol,
Sodium pentachlorophenol, parachlorometaxylenol, etc. are used, and the amount added is 0.05 to 1.5% by weight based on the content of the coloring material, diluent, extender pigment, fine pearlite, and fine zeolite.
Particularly preferred is 0.2 to 0.5% by weight. 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 amount of super absorbent resin is 0.01 to 2.0% by weight, especially 0.01 to 0.1% by weight.
is suitable. If it is less than 0.01% by weight, 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 a negative 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 the hygroscopic fine pearlite and fine zeolite is preferably 10 to 40% by weight, more preferably 11 to 20% by weight. If it is less than 10% by weight, the ability to absorb moisture is low and it is not economical, and if it exceeds 40% by weight, it will not be easy to paint, resulting in poor workability, and there is a risk that the paint will run down when absorbing moisture. The mixing ratio of fine pearlite and zeolite is
The ratio is 1.5:1 to 5:1, preferably 2:1 to 3:1. Fine powder pearlite has a specific surface area of 2.5m ² /g,
The fine powder zeolite preferably has a specific surface area of about 25 m ² /g. The above-mentioned organic or inorganic color vehicles, extender pigments, alkaline chemicals, diluents, and fungicides, as well as paint components containing pigments if necessary, powdered or fibrous superabsorbent resin, and hygroscopic fine powder. A paste-like paint obtained by sufficiently uniformly adding and mixing solid components including perlite and finely powdered zeolite,
The interior material of the present invention, which is highly effective in preventing dew condensation, can be provided by uniformly coating the surface of the base material with a brush or trowel to a thickness of, for example, about 1 to 5 mm. In addition, this base material includes veneer, slate,
Various board materials can be used, such as calcium silicate board, lightweight cement board, and gypsum board. In the present invention, when a breathable wallpaper is attached to the painted surface, the breathable wallpaper is made of a film made of ordinary synthetic resin such as vinyl chloride, and has ventilation holes of a size that does not impair the aesthetics, such as needles. Examples include films with holes, films whose material itself is breathable, and meshes made of various materials. 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, fine powder pearlite and fine powder zeolite have a shell structure with micropores, so they have a respiration effect, inhale moisture from the atmosphere, and release the absorbed moisture when drying. When interior materials using this paint are applied to interior walls, the breathing action of this paint allows indoor moisture to escape without condensation on the walls.
Absorbed into the paint film. Therefore, the interior material of the present invention hardly forms dew condensation even if 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 become poor. On the other hand, if zeolite is used alone, the paint becomes hard and is less suitable as a paint. By mixing pearlite and zeolite 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. [Examples] 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. Examples 1 and 2, Comparative Example 1 The laboratory was divided into an indoor side and an outdoor side by a 2 mm thick glass plate, and the indoor side was set at 25°C and the relative humidity was 80%, and the outdoor side was set at 0°C. In the above-mentioned laboratory, when the glass walls were untreated, dew condensation occurred on the indoor surface within one minute, and droplets flowed down the glass surface. On the other hand, methyl cellulose (2%
liquid), calcium carbonate as an extender pigment, titanium oxide as a white pigment, slaked lime as an alkali agent, and three types of paint obtained by mixing an antifoaming agent, pearlite, and zeolite in the ratios shown in Table 1. An interior material was manufactured by applying it to a plywood board to a thickness of 1 mm. 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 dew condensation occurred on the surface even after more than 3 hours had passed.
The adhesion strength of the coating film was also 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, Example 2
In this case, the amount of super absorbent resin blended was large and foamy substances were generated, and it was confirmed that it is particularly suitable to blend the super absorbent resin in an amount less than 0.15% by weight.

【table】

[Table] 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, as in Example 1, no dew condensation was observed even after 3 hours had passed, 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, and is suitable for new concrete buildings as well as
It is also possible to prevent condensation in existing concrete buildings, for which there was no solution at all. Of course, the interior material of the present invention can also be used for wooden houses. Also,
It is inexpensive and easy to construct. In particular, wallpaper can be given a desired color or pattern, making it extremely excellent as an interior material from an aesthetic point of view.

Claims (1)

[Scope of Claims] 1. A paint component containing an organic or inorganic color vehicle, an extender, an alkaline chemical, a diluent, and a fungicide, and a highly water-absorbent powder or fiber on the surface of a base material for interior use. An architectural interior material characterized by being coated with a wall condensation prevention paint consisting of a resin, a solid component containing hygroscopic fine perlite, and fine zeolite. 2. The architectural interior material according to claim 1, wherein the paint component further contains a pigment. 3. The architectural interior material according to claim 1 or 2, characterized in that the amount of fine pearlite and zeolite added is within the range of 10 to 40% by weight. 4. The architectural interior according to any one of claims 1 to 3, wherein the mixing ratio of fine pearlite and fine zeolite is within the range of 1.5:1 to 5:1. Material. 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 super-absorbent resin, and hygroscopic fine powder pearlite are applied to the surface of the interior substrate. and a solid component containing finely powdered zeolite, which is coated with a paint for preventing condensation on a wall surface, and a breathable wallpaper is pasted on the painted surface.