JP2002348168A - Quick hardening, humidity adjustable inorganic diatomaceous paint finishing material and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly humidity adjustable inorganic diatomaceous paint finishing material that prevents dew condensation and mold growth, having odor drowning effect, without generating indoor chemical pollutants. SOLUTION: This quick hardening, highly humidity adjustable inorganic diatomaceous paint finishing material includes 5-15 wt.% quick hardening cement, 15-35 wt.% Portland cement, 5-30 wt.% calcium hydroxide, 5-30 wt.% plaster, 10-50 wt.% diatomite, 10-30 wt.% inorganic light aggregate, 0-5 wt.% fiber, 0.1-10 wt.% powdery thickening agent, 0.5-10 wt.% re-dispersive powdery resin as its essential components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a deodorizing effect of controlling the humidity in a room, preventing dew condensation, suppressing the generation of mold, and adsorbing offensive odors, when used in building interior construction work. Further, the present invention relates to a high-humidity inorganic diatomaceous earth-based finish coating material that does not generate indoor pollutant chemicals, which is a current social problem, and a finish coating method using the same.

[0002]

2. Description of the Related Art With respect to indoor environmental problems, recently, the phenomenon that indoor air is polluted and causes health problems has been increasing. It is said that this is due to the fact that the indoor airtightness has been improved and ventilation has been reduced due to the heat insulation and energy saving measures of the building. Another reason is that the development of new building materials has intensified and the products have been commercialized without sufficiently examining chemical substances that cause health problems.

[0003] Among the health disorders that occur in these houses, cases in which the cause and causal relationship of the symptoms cannot be determined are called SBS (sick building syndrome; sick building syndrome). Is more commonly used. This is not a specific pathological symptom, but is used collectively for various health disorders including poisoning and neuropathy, and is particularly called MCS (Multiple Chemical Sensitivity; Chemical Sensitivity). Health disorders such as allergies and atopy
At present, the cause has not been sufficiently elucidated.

At present, attention has been paid to indoor air pollutants derived from house building materials, such as "formaldehyde" contained in adhesives such as plywood and cloth, wood preservatives and insect repellents, and vinyl cloth. "VOC (Volatile Organic Compounds)", which is a generic term for plasticizers and volatile organic compounds such as toluene and xylene contained in paints, is typical. Chemical substances (substance concentrations) that cause health problems are in a situation where they cannot be simply defined because there are many types of the causative substances and there are differences in the effects among people.

[0005] In the building materials-related industry, although there has been a movement to reduce indoor environmental pollutants that set target standards, it is practically impossible to completely eliminate pollution sources. The fact that it must be used is also a real problem. It is considered that the pollutants remaining in the building materials are gradually released into the air, and the degree of the release depends on the indoor environment. In other words, even if a small amount of pollutant is generated, the airtightness of the house is improved, so that the concentration easily affects the human body, thereby causing the above-mentioned health problems.

[0006] Interior building materials are composed of many chemical substances as raw materials, and there are some raw materials and products used for the purpose of exerting various functions because of their great advantages, although there are negative factors. In recent years, indoor environmental pollution has become a social problem, and indoor air conditioning and ventilation facilities have been improved, and air purifiers and the like have come to be used. The interior materials themselves are also reducing plasticizers in vinyl cloth, reducing formalin in adhesives, reducing VOCs in paints, and replacing them with raw materials that do not contain pollutants. Not satisfactory.

Conventionally, there are finishing methods such as cement mortar coating, plaster plaster coating, dolomite plaster coating, and plaster coating in plastering work.
It is a construction method with many steps of intermediate coating and top coating. In recent years, from the viewpoint of workability, design, and cost, cloth attachment to a base such as gypsum board has become mainstream, and inorganic interior materials have hardly been used.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by directly applying a paint to a concrete, gypsum board, plaster board, panel, or other indoor or outdoor base, by using a conventional plaster finish or plaster finish. In order to provide a finish coating material with improved workability, which is a drawback of coating, the finishing can be completed in one day, and the humidity in the room is adjusted to prevent dew condensation and suppress the generation of mold. Another object of the present invention is to provide a high-humidity finish coating material made of an inorganic natural material having a deodorizing property of an odor and not generating indoor polluting chemical substances, and a finish coating method using the same.

[0009]

The present invention for solving the above-mentioned problems includes the following inventions.

(1) 5-15% by weight of fast-setting cement, 15-35% by weight of Portland cement, 5-30 of slaked lime
Diatomaceous earth 10-5% by weight, plaster 5-30% by weight
0% by weight, mineral lightweight aggregate 10-30% by weight, fiber 0
A fast-setting, high-humidity inorganic diatomaceous earth-based finishing coating material comprising a composition comprising 5% by weight, 0.1 to 10% by weight of a powder thickener, and 0.5 to 10% by weight of a redispersible powder resin.

(2) 5-15% by weight of fast-setting cement, 15-35% by weight of Portland cement, 5-30 of slaked lime
Weight%, plaster 5-30 weight%, diatomaceous earth 10-3
0% by weight, mineral lightweight aggregate 10-30% by weight, fiber 0
5% by weight, 0.1 to 10% by weight of a powder thickener, 2 to 10% by weight of a redispersible powder resin, an undercoating material composed of essential components, 5 to 15% by weight of a fast-setting cement, Portland cement 15 to 35% by weight, slaked lime 5 to 30% by weight,
5 to 30% by weight of plaster, 20 to 50% by weight of diatomaceous earth, 10 to 30% by weight of inorganic lightweight aggregate, 0 to 2% by weight of fiber, 0.1 to 10% by weight of powder thickener, 0 of redispersible powder resin An early-hardening high-humidity inorganic diatomaceous earth-based finish coating material, which is combined with a top coating material comprising a composition containing 0.5 to 5% by weight as an essential component.

(3) The quick-setting, high-humidity inorganic diatomaceous earth as described in (1) or (2), wherein the coating obtained by curing the mortar has a moisture absorption of 180 g / m ² or more. System finish coating material. (4) The undercoat material has an excellent adhesion strength of a coating film formed from the composition to an object to be coated, and the overcoat material has a coating film formed from the composition having excellent hygroscopicity. (3) An early-hardening high-humidity inorganic diatomaceous earth-based finish coating material comprising a combination of the undercoat material and the topcoat material according to (3).

(5) The coating according to any one of the above items (1) to (4), wherein a moisture absorption of a coating film formed from the finish coating material is 180 g / m ² or more. Fast-setting, high-humidity inorganic diatomaceous earth-based finish coating material.

(6) A mortar prepared by adding water to the fast-setting, high-humidity, inorganic diatomaceous earth-based finishing material described in any one of the above items (1) to (5) is subjected to finish coating. A finish coating method comprising applying one or more layers to the body.

(7) The finish coating method according to (6), wherein the object to be finished is a building material or a concrete base.
(8) The finish coating method according to (7), wherein the building material is a gypsum board, a ceramic siding board, a plaster board, or a panel.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention comprises a solidified material, diatomaceous earth and an inorganic lightweight aggregate as main components.

The fast-setting cement used in the fast-setting, high-humidity inorganic diatomaceous earth-based finish of the present invention is defined as the hardened cement which is applied in 3 to 5 hours after application of the finish of the present invention. The present invention can exhibit a coating film curing strength that allows the coating material of the present invention to be applied repeatedly. Alumina cement, jet cement, ultra-rapid cement, and the like can be used as the rapid-setting cement. The mixing ratio of the fast-setting cement in the finish coating material is 5 to 15% by weight.
If it is less than 5% by weight, it will not be possible to obtain fast-hardening properties, and if it exceeds 15% by weight, not only will it cure instantaneously, but also its shrinkage cracks during curing and its humidity control function will decrease.

The Portland cement used in the fast-setting, high-humidity inorganic diatomaceous earth-based finish of the present invention is a main component that develops the hardening strength of the coating film. And the like. The proportion of Portland cement in the finish coating material is desirably from 15 to 35% by weight. If it is less than 15% by weight, the material strength is low. descend. In order to maximize the toning property, it is preferable that both the early-hardening cement and the Portland cement are white.

As the slaked lime used in the fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention, white slaked lime generally used in plastering works can be used. Slaked lime is desirably incorporated at 5 to 30% by weight in the finish coating material.

As the plaster used in the fast-setting high-humidity inorganic diatomaceous earth-based finish coating material of the present invention, a white plaster generally used in plastering work can be used. It is desirable to be blended in weight%. If the amount is less than 5% by weight, no auxiliary function as a solidifying material is exhibited, and if the amount exceeds 30% by weight, shrinkage cracks at the time of curing and the humidity control function decrease.

The diatomaceous earth used for the fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention is fossilized soil of a single-cell plant (diatomaceous plant) for many tens of millions of years. It has an effect of enhancing functions such as humidity control, moisture absorption, deodorization, and heat insulation.
It is desirable to be blended by weight%. If it is less than 10% by weight, the humidity control function is not exhibited, and if it exceeds 50% by weight, the material strength is remarkably reduced, and the strength required as a finish coating material cannot be obtained. The undercoating material in the present invention is desirably blended in an amount of 10 to 30% by weight from the viewpoint of material strength, and the overcoating material is desirably incorporated in an amount of 20 to 50% by weight in view of a humidity control function.

The inorganic lightweight aggregate used in the fast-setting, high-humidity inorganic diatomaceous earth finishing material of the present invention includes porous diatomaceous earth granules, zeolites, inorganic microballoons, pearlite, hillite, mica and the like. Those having a function can be used. Inorganic lightweight aggregates are introduced into the finish coating material.
If it is less than 10% by weight, it will not be effective in assisting the humidity control function or prevent shrinkage cracks. Can not be obtained.

As the fiber used for the fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention, pulp fiber, glass fiber, vinylon fiber and the like can be used. The type of fiber and the length of the fiber are selected based on workability, an effect of preventing shrinkage cracking, and the like. However, since the use of the fiber affects the smooth finished state, the fiber may not be used when the contraction crack due to the hardening of the cement does not occur. The blending amount of the fiber in the finish coating material is preferably from 0 to 5% by weight, and particularly preferably the blending amount in the top coat material is from 0 to 2% by weight.

The powder thickener used in the fast-setting, high-humidity inorganic diatomaceous earth-based finish of the present invention includes MC (methylcellulose), CMC (carboxymethylcellulose),
HEC (hydroxyethyl cellulose), CMHEC
Those obtained from natural cellulose (pulp) such as (carboxymethylhydroxyethyl cellulose) can be used. The powder thickener imparts fluidity and viscosity to the finish coating material,
In order to form various finished patterns, for the purpose of ensuring workability suitable for coating methods such as iron coating, spatula coating, brush coating, roller coating, spray coating, 1-3 types of the above powder thickeners And mix to 0.1 to 10% by weight
It is desirable to mix. If it exceeds 10% by weight, the viscosity of the finish coating material is too high, resulting in poor workability and slow drying of the finish coating material.

The redispersible powder resin used in the fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention includes vinyl acetate, vinyl acetate-veova, EVA (ethylene vinyl acetate), styrene acrylic, acryl-vinyl acetate. -A resin system such as veova can be used. The redispersible powder resin is a water-based emulsion that has been pulverized by spray drying.
It is added for the purpose of improving the adhesion strength of the coating film to the base. The amount of the redispersible resin powder mixed in the finish coating material is preferably 0.5 to 10% by weight. If it is less than 0.5% by weight, the adhesive strength will not increase, and if it exceeds 10% by weight, the adhesive strength will increase, but on the contrary, the humidity control function will decrease. The undercoating material of the present invention has a strength of 2 to the base.
It is desirable that it is blended in an amount of 0.5 to 5% by weight, and it is desirable that the topcoat material be blended in an amount of 0.5 to 5% by weight in order to sufficiently exhibit a humidity control function.

The fast-setting, high-humidity inorganic diatomaceous earth-based finish of the present invention can use inorganic additives such as silica sand, silica powder, clay, bentonite, montmorillonite, and color pigments. It can be added by appropriately selecting from the surface state, tonality, and the like.

The fast-setting, high-humidity inorganic diatomaceous earth-based finishing coating material of the present invention further comprises organic additives such as a water reducing agent, a thixotropic agent and a water-repellent material, and an accelerating admixture which develops the curing strength within a predetermined time. Can be used, workability, mixing water volume adjustment,
It can be appropriately selected and added in order to prevent cracks in the coating film.

[0028] The finish coating material of the present invention composed of the above-mentioned raw materials includes concrete, gypsum board, plaster board,
It can be directly applied to the base of a panel or the like, and the gypsum plaster base processing of the conventional interior plastering work can be omitted. In addition, the finish construction of plaster coating is undercoating,
Intermediate coating, overcoating, has become a construction method with many construction steps, but the finish coating material of the present invention is an undercoating, overcoating and two-step finishing method, and a quick-setting type that can complete construction in one day. It is a finish coating material.

When the fast-setting, high-humidity inorganic diatomaceous earth-based finishing material of the present invention comprises a combination of an undercoating material and an overcoating material, the undercoating material makes the suction uniform and corrects the level difference of the undercoating. It functions as an intermediary for bringing the topcoat material into close contact, and provides an adhesion strength of 0.7 N / mm ² or more.

The overcoating material functions to absorb excessive moisture in the room to prevent dew condensation, suppress the generation of mold, and to exert a deodorizing property of bad odor.
/ Mm ² or more. In this overcoat material composition, the amount of diatomaceous earth added is adjusted so as not to impair the adhesion to the undercoat material and the humidity control.

The finish coating material of the present invention is made of an inorganic natural material which does not generate indoor pollutant chemicals. It does not contain environmental pollutants and can prevent health problems such as allergy and atopy.

The quick-setting, high-humidity inorganic diatomaceous earth-based finish coating material of the present invention is applied to a finish-coated body and cured, and then a permeable water-absorbing material is applied to impart water repellency to the surface and prevent dirt. I do. This makes it possible to apply the present invention to a portion of the interior surface that is exposed to water, and to form a wall surface having a soft finish as an outdoor finish coating material. Since the permeable water-absorbing material does not impair the moisture-permeability, the moisture-absorbing performance of the quick-setting, high-humidity inorganic diatomaceous earth-based finish coating material of the present invention is maintained. As the permeable water absorption preventing material, JP-B-4-53835, JP-B-7-5
An organic silicon-based composition of an aqueous or solvent-based alkylalkoxysilane reported in No. 400 or the like can be used.

[0033]

The present invention will be specifically described below with reference to examples.

Example 1 Alumina cement 7.7% by weight, Portland cement 20.6% by weight, slaked lime 14.2% by weight, plaster 1
5.8% by weight, diatomaceous earth 22.8% by weight, zeolite 1
3.1 wt%, EVA resin 3.1 wt%, 6 mm long vinylon fiber 0.2 wt%, methylcellulose 2.5 wt%
Was mixed, and 80 parts by weight of water was added to 100 parts by weight of the powder, and kneaded to prepare a mortar, which was used as a test material.

Examples 2 to 17 and Comparative Examples 1 to 5 Examples 2 to 17 and Comparative Examples 1 to 5 in which the proportions of the components used in Example 1 were changed from those in Example 1. Of test materials were prepared. The following tests were performed for each test material.

[Workability test] The material was placed on the base of the gypsum board.
The workability was evaluated in consideration of the application in mm, the dripping property, and the pot life. [Shrinkage cracking test] The same operation as in the workability test was performed.
After 4 hours, the presence or absence of cracks in the coating film was confirmed.

[Drying Time] The same operation as in the workability test was performed, and the appropriateness of the drying time was confirmed by finger touch in consideration of the recoatability of the undercoat material and the overcoat material. [Hygroscopicity] A material having a thickness of 2 mm was applied to a 20 × 20 cm steel plate, placed in a constant temperature / humidity chamber adjusted to 20 ° C. and 95% ± 5%, and the maximum moisture absorption was measured.

[Adhesive strength] A 2 mm thick material is applied to a 7 × 7 × 2 cm mortar plate, and is applied at 23 ° C. and 50% RH for 1 hour.
After curing for 4 days, it was measured according to JIS A 6909 adhesion test. Incidentally, the primer material is 0.7 N / mm ² or more, overcoat material was criteria acceptance of 0.5 N / mm ² or more.

Tables 1 and 2 show the proportions of the test materials and the test results.

[0040]

[Table 1]

[0041]

[Table 2]

[Field Test] In the room on the north side of the first floor of the apartment, which has been built for 8 years, the internal dew condensation was severe, mold was generated on the vinyl cloth of the interior finish, and part of the room was peeled off. In this room, as a result of removing the vinyl cloth and renovating it with the high-humidity inorganic diatomaceous earth-based finish coating material of the present invention, no condensation was seen on the interior wall surface even after about one year, No hygroscopic effect was observed, and the hygroscopic inorganic diatomaceous earth-based finish coating material of the present invention was confirmed to have a moisture absorbing effect.

Further, when the interior of the children's room of a newly built detached house was subjected to finish coating with the high-humidity inorganic diatomaceous earth-based finish coating material of the present invention, there was a chronic illness of atopic dermatitis even after about half a year had passed. The child did not experience any health problems. From the above results, unlike the conventional vinyl cloth and the like, the high-humidity inorganic diatomaceous earth-based finishing coating material of the present invention does not generate indoor polluting chemicals such as formaldehyde and volatile organic solvent (VOC), and poses a health hazard. Not confirmed.

Example 18 A mortar obtained by adding 80 parts by weight of water to 100 parts by weight of the composition powder of Example 1 and kneading the mixture was applied to a thickness of 2 mm.
After drying and curing for 4 hours, a permeable water-absorbing material made of a solvent-based alkylalkoxysilane (COMFIX S)
(M-7: manufactured by Tsuneka Chemical Industry Co., Ltd.), and two types were prepared, one coated and the other uncoated. In addition, as a test base plate, a slate plate of 22.5 × 30 cm was used for the water permeability test, and a 20 × 20 cm steel plate similar to that of Examples 1 to 17 was used for the moisture absorption test. [Water permeability test] The amount of water permeability after 24 hours was measured according to JIS A 6909 water permeability B method. [Hygroscopicity test] Measured in the same manner as in Examples 1 to 17.

Table 3 shows the test results of Example 18 and the test results of Example 1.

[0046]

[Table 3]

[0047]

As described above, the high-humidity inorganic diatomaceous earth-based finish coating material of the present invention can be directly applied to the base such as concrete, gypsum board, plaster board, panel, etc. It is a low-cost finish coating material that can omit the gypsum plaster base coat treatment, has good adhesion to the base coat and cracking properties compared to plaster coat finish, and can shorten the construction time to one day.

Further, since the finish coating material of the present invention is made of the above-mentioned inorganic natural material, it contains plasticizers and indoor environmental pollutants such as formalin as in the case of cloth paste which has recently become the mainstream of interiors. It does not cause health problems such as allergy and atopy. Furthermore, the interior wall surface finished with the finish coating material of the present invention not only absorbs excess moisture in the room to prevent dew condensation and suppress the generation of mold, but also has a deodorizing function for odors, so it is used for healthy houses It is an ideal environmentally friendly finish coating material for interior finishing.

Continuation of the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) // (C04B 28/14 C04B 7: 345 7: 345 22:06 Z 22:06 14:08 14:08 24:38 C 24:38 24:24 24:24 14:02 B 14:02 14:38 Z 14:38 16:06 B 16:06) F term (reference) 4G012 PA03 PA05 PA24 PB03 PB30 PB40 4J038 DL031 MA07 MA08 NA01

Claims (6)

[Claims] 1. Fast-setting cement of 5 to 15% by weight, Portland cement of 15 to 35% by weight, slaked lime of 5 to 30% by weight, plaster of 5 to 30% by weight, diatomaceous earth of 10 to 50% by weight, inorganic lightweight aggregate of 10 to 10% Fast-curing high-humidity composition comprising a composition comprising 30% by weight, 0 to 5% by weight of fiber, 0.1 to 10% by weight of a powder thickener, and 0.5 to 10% by weight of a redispersible powder resin. Inorganic diatomaceous earth finishing material. 2. 5 to 15% by weight of fast setting cement, 15 to 35% by weight of Portland cement, 5 to 30% by weight of slaked lime, 5 to 30% by weight of plaster, 10 to 30% by weight of diatomaceous earth, 10 to 10% of inorganic lightweight aggregate An undercoat material comprising a composition comprising 30% by weight, 0 to 5% by weight of fiber, 0.1 to 10% by weight of a powder thickener, and 2 to 10% by weight of a redispersible powder resin, and a pre-setting cement 5 -15% by weight, Portland cement 15-35% by weight, slaked lime 5-30% by weight, plaster 5-30% by weight, diatomaceous earth 20-50% by weight, inorganic lightweight aggregate 10-30% by weight, fiber 0-2% by weight %, Powder thickener 0.1 to 10% by weight, redispersible powder resin 0.5
An early-hardening high-humidity inorganic diatomaceous earth-based finish coating material, which is combined with a top coating material comprising a composition containing 5 to 5% by weight as an essential component. 3. The quick-setting, high-humidity inorganic diatomaceous earth-based finish coating material according to claim 1, wherein the coating obtained by curing the mortar has a moisture absorption of 180 g / m ² or more. 4. A finish coating method comprising applying a mortar prepared from the quick-setting, high-humidity inorganic diatomaceous earth-based finish coating material according to claim 1 to a finish-coated body. Method. 5. A mortar prepared from the quick-setting, high-humidity inorganic diatomaceous earth-based finish coating material according to any one of claims 1 to 3, which is applied to a finish-coated body, cured, and then coated. A finish coating method comprising applying a permeable water-absorbing preventive material for the purpose of preventing soiling. 6. The finish coating method according to claim 4, wherein the object to be finished is a building material or a concrete base.