JPH08217563A - Building material - Google Patents

Abstract

PURPOSE: To obtain excellent permeability of water content and air by forming a building material of a composite material consisting of rock powder consisting essentially of porous rock, and a thermoplastic resin. CONSTITUTION: Rock powder consisting essentially of porous rock such as zeolite subjected to drying treatment, a thermoplastic resin selected from the group of a PP resin, a PE resin, a PS resin and the like are combined at a prescribed ratio, and the compound material is kneaded by a mixing roll or the like. Next, after the kneaded material is pressurized and formed by a compressor or the like, the formed material is cooled and solidified to obtain a building material excelling in absorptivity and emmissivity of water content and air permeability consisting of 32-77wt.%, preferably about 35-64wt.% rock powder and the residual which is a (rock/resin) composite material of resin components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building material composed of a composite material having water absorption and release properties and a controlled release property such as a fungicide.

[0002]

OBJECT OF THE INVENTION Conventionally, building materials have been mainly wood,
Alternatively, a plywood such as plywood, a so-called foam concrete wall material made of cement, or a synthetic resin wall material made of polyvinyl chloride resin or polyethylene resin is commercially available. Further, a material such as a metal material coated or the like or a surface-treated aluminum plate is often used. Although wood provides an excellent living environment, it is prone to spoilage and discoloration, and has a short life when used as an exterior wall material or around water. The veneer board is convenient for obtaining a large area at a low cost, but there is a problem in that it is severely discolored when used for a long time and peels off when exposed to wind and rain. Cement has excellent properties as a structural material as well, but it has poor air permeability, and it is said that it will become a hotbed for mold and mites, as will be described later, due to dew condensation due to room heating or the like especially in winter. It is said that the synthetic resin wall material has almost no air permeability and is extremely dangerous against fire. Metal materials are said to be safe against fire due to the generation of no toxic gases, but the dew condensation in winter is not different from cement materials.

The present invention solves these problems, makes the distribution of moisture and air equal to or more than wood, and provides a building material that has a weight reduction comparable to aluminum building materials and a design property such as tiles. The purpose is to provide.

A further object of the present invention is to provide a building material capable of adsorbing a mildew-proofing agent and the like and gradually releasing it over time.

[0005]

As a result of repeated studies on the composite material, the present inventors have made a resin composite material in which powder or fine particles of porous rock are mixed, and the composite material is used to construct a building. The material is completed. That is, the present invention provides a building material molded from a composite material composed of a rock powder containing porous rock as a main component and a resin.

As the porous rock used in the present invention,
Zeolites mainly produced in the north of the Tohoku region and the Kanto region are preferred. On the other hand, the resin is preferably a thermoplastic resin. Among the thermoplastic resins, polypropylene resin, polyethylene resin, polystyrene resin and the like are preferably used, but other resins may be used, and further, vinyl chloride resin or copolymer resin ABS which is powdery at room temperature. It may be resin or the like.

A building material having a desired shape is formed from a kneaded material of a powder of porous rock and a resin. As the molding method, vacuum molding, pressure molding, etc. are preferably used after injection molding, roll molding, but of course other methods may be used.

The composite material as a building material of the present invention preferably contains 32-77% by weight, particularly preferably 35-64% by weight, of porous rock, and the rest is a resin component. When the content of the porous rock exceeds 77% by weight, the porous rock easily falls off from the surface of the composite material, and it is difficult to obtain a molded product having sufficient strength. When the content of the porous rock is 31% by weight or less, water absorption / release characteristics and sustained release properties are deteriorated. It is considered that this is because the porous rock is embedded in the resin and the water absorption / release characteristics of the porous rock are lost. A building material composed of a porous rock, preferably a composite with a suitable content of zeolite,
Not only is it excellent in water absorption, release, and sustained release, it is also excellent in air conduction, is lightweight, and is excellent in transportability.

The composite material may naturally contain a heat stabilizer, an antioxidant, an ultraviolet absorber, etc., which are generally added to the resin, and for the purpose of reinforcement, various organic / inorganic reinforcing fibers. Or whiskers may be included.

[0010]

The present invention will be described in more detail by the following examples.

Example 1 Approximately 4 kg of mordenite type zeolite (zeolite No. 1424 manufactured by Shin-Tohoku Chemical Industry Co., Ltd., produced by Aiko, Sendai City, Miyagi Prefecture)
Put the degree in a stainless steel vat and dry it at 160 ℃
It was dried for 48 hours, naturally cooled to 80 ° C., and immediately stored in a polypropylene wide-mouth bottle. 77.
0 g was collected in a polypropylene beaker, and polypropylene resin (PP manufactured by Showa Denko KK; MK-852) was added to 2 g.
After adding 3.0 g and stirring lightly, the mixture was placed on a mixing roll (NS-200 type manufactured by Nishimura Koki Co., Ltd.) adjusted to 210 ° C., and thoroughly mixed for 7 minutes while stirring with a stainless spatula. Take this out and put it inside 15 cm x 15 cm
× Zeolite / polypropylene which was sandwiched between stainless plates with a hole of 0.2 cm in depth and compressed at 120 kg / cm ² with a compressor (210 type manufactured by Yamaguchi Kikai Co., Ltd.) adjusted to 210 ° C. in advance and then cooled and solidified. The resin composite was taken out. The zeolite content at this time is 77% by weight. In terms of appearance, ○ holds sufficient strength, △ holds sufficient strength, but has low fluidity and is difficult to mold, ×
Is not moldable, and the results are shown in Table 1. Furthermore, if the zeolite is completely covered with the resin, the moisture absorption and desorption property may be lost. As a result of observing the resin state, A: the resin has no luster, B: the zeolite has the luster even if the resin has luster. The state where there is a gap between the particles and C: the state where the zeolite particles are completely embedded in the resin was observed, and the results are also shown in Table 1. This composite material is called A-77.

Example 2 The weight% of zeolite is from 76% to 32% by weight,
A composite material was produced in the same manner as in Example 1 except that the content was changed every 2% by weight. The results are also shown in Table 1.

Comparative Example 1 A composite material containing 78 and 80% by weight of zeolite was prepared in exactly the same manner as in Example 1, and the results are also shown in Table 1. When the zeolite content was 78% by weight or more, the zeolite powder could not be kneaded well with the resin, the obtained composite material was brittle, and the zeolite powder was also exfoliated from the surface.

Comparative Example 2 In exactly the same manner as in Example 1, a composite material containing 31 and 30% by weight of zeolite was prepared. The results are also shown in Table 1. When the zeolite content is low and the resin content is high, the zeolite is covered with the resin, which is not preferable.

[0015]

[Table 1]

Example 3 In the above-mentioned Examples 1 and 2 and Comparative Examples 1 and 2, the mordenite-based zeolite was replaced by a clinoptilolite-based zeolite (Zelite Co., Ltd. Zeolite Z-12, Itaya, Yamagata Prefecture). A composite material was produced in exactly the same manner except that the above was changed. The results are also shown in Table 1. This composite material 1
Call it -77.

The results shown in Table 1 show that the zeolite content is 32 to
A range of 77% by weight is preferred and indicates that the origin of the zeolite does not affect the properties of the composite.

Example 4 77% by weight of the mordenite zeolite prepared in Example 1
The contained product and the product containing 77% by weight of the clinoptilolite-based zeolite prepared in Example 3 were dried at 60 ° C. for 48 hours, the weight was determined, and then the temperature and humidity were set to 23 ° C. and 90% RH. (CHF-S type manufactured by Vessel Co., Ltd.), and the weight is measured with an electronic balance (METTLER BD 1201 manufactured by Nihon Siber Hegner Co., Ltd.) at regular time intervals at a temperature of 23 ° C. and a humidity of 90% RH. The water adsorption was measured. The increase was determined as a percentage based on the dried zeolite / polypropylene composite. Also,
The time is calculated in minutes, and the result is shown in FIG. FIG. 1 shows that the composite material according to the present invention is a building material having sufficient hygroscopicity.

Comparative Example 3 A commercially available cedar board material is cut with a saw and is approximately 5c.
The size was about m × 7 cm × thickness 1 cm. When this was changed to the zeolite composite material of Example 1 and the amount of water absorbed was measured, a slight amount of water was absorbed. The results are also shown in FIG.

Comparative Example 4 A commercially available plywood (wooden wall material made by Matsushita Electric Works, Ltd. Western material Ace / E type pastel white) is generally used for 5
The size of cm × 7 cm × thickness 0.4 cm was cut with a saw, and moisture absorption was measured in exactly the same manner as in Comparative Example 3. The results are also shown in FIG. As can be seen from FIG. 1, since the surface was printed with a resin layer, it hardly absorbed moisture.

EXAMPLE 5 77% by weight of the zeolite / polypropylene resin composite material (using clinoptilolite and mordenite type zeolite) prepared in Examples 1 and 3 was weighed to 300 ml.
It was immersed in a glass beaker containing pure water. The water temperature at this time was 19 ° C. The test piece was taken out, the water was wiped off with a filter paper, and the sample was left at room temperature within 23 ° C. for 30 minutes. After the weight measurement, the sample was left in a thermo-hygrostat (CHF-S type manufactured by Vessel Co., Ltd.) adjusted to a temperature of 23 ° C. and a humidity of 50% RH, and the weight was measured at each time. Further, the amount of released moisture based on the dried test piece was determined as a moisture release amount in% by weight. The results are shown in Figure 2. As can be seen from Fig.-2, the zeolite composite material has a moisture content of 28-35.
It has the function of absorbing% and further releasing absorbed water little by little. In addition, in FIG. 2, the time is set to minutes and the common logarithm is used as in FIG.

Comparative Examples 5 to 6 The cedar board materials and the decorative plywood test pieces used in Comparative Examples 3 and 4 were processed in exactly the same manner as in Example 5 to determine the water absorption and release amounts. The amount was about 1/4 to 1/6 of the zeolite composite material, and the decorative plywood had almost no water absorption or release property. The results are also shown in FIG.

Example 6 500 in a 1 liter glass beaker at room temperature 23 ° C.
After collecting ml of pure water, 100 g of salt (manufactured by Shin-Nippon Kagaku Kogyo Co., Ltd. sold by Japan Tobacco Inc., sodium chloride 99% or more) was added, and the mixture was stirred with a glass rod for 10 minutes and left for 24 hours, Further, the salt remaining on the bottom was dissolved by stirring. After 1 hour, the undissolved salt was further confirmed at the bottom of the beaker, and 400 ml of the supernatant was transferred to a new 1 liter glass beaker, which was used as a saturated saline solution. 77% by weight, 70% by weight, 60% by weight, 50% by weight, 40% by weight of zeolite from the zeolite / polypropylene resin composites prepared in Examples 1 and 2
5 kinds of each are selected and immersed in this saturated saline solution.
After leaving it for 4 hours, it was pulled up, the surface was wiped with a filter paper, and then left for 30 minutes in the room. 300 ml of pure water (distilled water manufactured by Kyoei Pharmaceutical Co., Ltd., Japanese Pharmacopoeia purified water) was collected in a clean beaker, and one piece of the composite material after soaking in saturated saline solution was soaked in the beaker. A test piece was taken out from pure water. 3-5 ml of this pure water was sampled in a clean 20 ml test tube, several drops of 5% silver nitrate aqueous solution was added, and when the chloride ion and silver ion produced silver chloride, it became cloudy, and the sodium chloride absorbed by the composite material. It was verified that was released in pure water. The composite material further pulled from pure water was immersed in fresh pure water, and the same operation was repeated until the chlorine ions in sodium chloride were not detected by silver nitrate. The results are shown in Table 2. The silver nitrate used was a reagent special grade manufactured by Kanto Chemical Co., Inc. The legend of Table 2 is that ⊚ is strongly cloudy, ○ is milk or less rice polishing liquid, Δ is rice polishing liquid or less, and × is nothing.

As can be seen from Table 2, sodium chloride is released even if the pure water is replaced up to 22 times.
Therefore, it was revealed that it has an excellent sustained release property.

Comparative Examples 7 to 8 The same procedure as in Example 6 was carried out except that a commercially available cedar board material was cut into a sample of approximately 5 cm × 7 cm × thickness of 1 cm and used as a sample. (Comparative Example 7) Further, a decorative plywood was cut out in the same manner and carried out in exactly the same manner as in Example 6. (Comparative Example 8) The results are also shown in Table 2. The cedar board material showed a slight sustained-release property, but it was not sufficient, and the decorative plywood did not show any sustained-release property.

Comparative Example 9 A sustained release test was conducted in exactly the same manner as in Example 6 for the two composite materials of 31% by weight and 30% by weight of the zeolite prepared in Comparative Example 2. The results are also shown in Table 2. As can be seen from Table-2, when the amount of resin increases and the amount of zeolite decreases, it is considered that the reason is that the zeolite particles are covered with the resin, and the sustained-release property is almost lost.

[0027]

[Table 2]

Example 7 5 with the same zeolite content as used in Example 6
New specimens were prepared for some composites.

On the other hand, 490 in a clean 1 liter beaker
Then, 10 g of copper sulfate (Kanto Kagaku Co., Ltd. reagent grade 1) was added as a fungicide, and dissolved by stirring with a glass rod to prepare a 2% copper sulfate solution. The solution was light blue and transparent. Further, a 5% aqueous solution of barium chloride (special grade reagent manufactured by Kanto Chemical Co., Inc.) was used as an indicator for detecting copper sulfate.
ml was made. Substituting saturated saline in Example 6,
A sustained release experiment of copper sulfate was conducted in exactly the same manner except that an aqueous solution of copper sulfate was used and an aqueous solution of barium chloride was used instead of the aqueous solution of silver nitrate. Incidentally, copper detection ^{_{CuSO 4 → Cu 2+ + SO 4}} 2- ··· (1) formula BaCl ₂ → Ba ²⁺ + 2Cl sulfate ^- ... (2) ^{_{Ba 2+ + SO 4 2- → BaSO}} 4 ↓ · .. (3) is used in the reaction formula (3), and the fact that the production of barium sulfate does not dissolve in water in water and precipitates in white turbidity is used. The results are shown in Table 3 for each test piece.

As can be seen from Table 3, the composite material shows extremely excellent anti-mold agent sustained release property.

Comparative Examples 10 to 11 Test pieces were similarly cut out from the cedar board material and the decorative plywood used in Comparative Examples 7 to 8 and tested in exactly the same manner as in Example 7.
The results are also shown in Table 3.

As can be seen from Table 3, the cedar board material has little mild release property of the fungicide, and almost no sustained release property is seen in the decorative plywood.

Comparative Example 12 A test piece was prepared in the same manner as in Comparative Example 2, and the same operation as in Example 7 was performed. The results are also shown in Table 3. Here, a large amount of resin was not able to obtain a preferable sustained release property.

[0034]

[Table 3]

Example 8 The procedure of Example 1 was repeated, except that the polypropylene resin was changed to polystyrene resin (GP polystyrene 2V-62F manufactured by Showa Denko KK). Polypropylene resin and polystyrene resin have slightly different specific gravities. Polypropylene resin has a specific gravity difference of 0.98 g / cm ³ and polystyrene resin 1.05 g / cm ³ , respectively. Was measured in a predetermined amount, and the zeolite content was 77% by weight and the polystyrene resin was 23% by weight.

This composite material had sufficient air permeability and strength, and could be sufficiently molded by compression molding.

[0037]

INDUSTRIAL APPLICABILITY The building material of the present invention is excellent in the flowability of moisture and air, can prevent the growth of mold, and can provide a favorable environment for the living environment. Further, it is excellent in sustained release property, and it is possible to adsorb the antifungal agent once and then gradually release the antifungal agent little by little, and the effect of the antifungal agent can be maintained for a long period of time. Furthermore, it is easy to mold, does not easily ignite against fire, has excellent design, is relatively lightweight, and is easy to handle and cut with a saw.
Furthermore, nailing or the like is also possible.

[Brief description of drawings]

FIG. 1 is a diagram showing the water adsorption properties of samples of Example 4 of the present invention and Comparative Examples 3-4.

FIG. 2 is a diagram showing the water adsorption properties of the samples of Example 5 of the present invention and Comparative Examples 5-6.

Claims (3)

[Claims] 1. A building material molded from a composite material comprising a rock powder containing porous rock as a main component and a thermoplastic resin. 2. The porous rock is a zeolite.
Building material described in. 3. The building material according to claim 1, wherein the content of rock powder in the composite material is 32 to 77% by weight.