JPS6149263B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inorganic decorative material with excellent adhesion that is applied to building materials such as walls.

Various organic and inorganic materials have been used as decorative materials for construction materials.

In recent years, interest in the fire protection of construction materials has increased, and there has been a strong demand for decorative materials with excellent fire resistance.
Inorganic decorative materials such as water glass, phosphoric acid, cement, and silica sol are being reconsidered.

However, many of them are liquid and have the disadvantage of separating or hardening during storage, and they also have poor affinity with the base material, so they require surface preparation, etc., and have poor workability and adhesive properties. was not sufficient, and improvements were desired.

The present invention provides cement that can form various patterns;
It is an improved silica sol-based decorative material, and its main components are alumina cement 0.5-10 wt%, amorphous silicate fine powder 1-20 wt% alumina powder 5-30 wt%, and inorganic filler 40-93.5 wt%. It is an inorganic decorative material with excellent adhesion, with a ratio of amorphous silicic acid fine powder/alumina cement ≧0.5.

The features of the present invention are that the main component is an inorganic material, so it has excellent fire retardancy, does not generate or burn toxic gas even when heated, and has high adhesion, which is difficult to achieve with conventional inorganic materials. A dense decorative layer with strength can be obtained.

Another great feature of the present invention is that it is a powder, so it cannot be used with conventional organic paints, water glass,
Unlike inorganic decorative materials such as phosphoric acid and silica sol, it is not liquid, so it is easy to transport and store, and it does not harden or separate during storage, and can be easily applied by mixing it with water at the construction site. It is possible.

Moreover, unlike the cement used for conventional stucco finishing, the decorative material of the present invention can form various patterns depending on its specific formulation, and its workability is also extremely good.

Furthermore, the decorative layer made of the decorative material of the present invention has high surface hardness and is excellent in water resistance, heat resistance, chemical resistance, and abrasion resistance. It is something that can be coated onto a base material.

Furthermore, it has self-hardening properties, has a large amount of filler, and can obtain fluidity with less water than conventional products, so there is almost no shrinkage during curing, and therefore the decorative layer can be formed without causing defects such as cracks. An excellent decorative layer can be formed regardless of thickness.

The alumina cement used in the present invention can be any ordinary alumina cement whose main component is a calcium aluminate substance, and the alumina cement is blended in an amount of 0.5 to 10 wt%. If it is less than 0.5 wt%, there will be no sufficient effect on hardening and sufficient strength will not be obtained. Especially 1wt
% or more is preferable from the viewpoint of strength.

On the other hand, if it exceeds 10wt%, the amount of water increases,
Shrinkage increases during drying, making cracks or peeling more likely to occur, and curing time becomes faster, which limits working time. In particular, it is preferably 8 wt% or less.

As the amorphous silicic acid fine powder, any fine powder containing amorphous silicic acid or amorphous silicic acid as a main component can be used, and silica gel powder, ferrosilicon dust, desiliconized zircon silica dust, glass powder, etc. can be used. These act on alumina cement during hydration and are indispensable components for hardening and strength development, and are also components that impregnate the base material to form a decorative layer with excellent adhesion.

This is 1 to 20wt% blended, and 1wt
If it is less than 20wt%, the above effect cannot be obtained sufficiently, and if it is less than 20wt%
If the amount exceeds this amount, the amount of water increases and cracks or peeling are likely to occur due to drying shrinkage. Among them, 3~
By setting the content to 15 wt%, an excellent decorative layer with high adhesion can be formed.

The particle size of this amorphous silicic acid fine powder is set to be 1μ or less; if it is larger than this, the reaction of the alumina cement tends to be insufficient and it becomes difficult to develop sufficient strength, which is not preferable. It is preferable to set it to 0.1μ or less. Note that coarse particles may be mixed in due to the crushing process, but if the amount is 10 wt% or less, it will have almost no effect.

In addition, the amount of amorphous silicic acid fine powder is required to be at least 0.5 times the amount of alumina cement, and if it is less than 0.5 times, the strength and density tend to be insufficient. It is preferable in terms of surface condition and adhesive strength.

The alumina powder of the present invention has a particle size of 50 μm or less, and is added in an amount of 5 to 35 wt%. This is an ingredient that improves the strength and water resistance of the makeup layer.
If it is less than 5 wt%, there is almost no effect, and if it exceeds 30 wt%, the effect will not be affected much and the raw material cost will increase, which is not preferable. Among these, a content of 10 to 25 wt% is particularly preferable from the viewpoint of both strength and economy.

The inorganic filler is mainly a non-reactive aggregate, and silica sand, asbestos, glass fiber, rock wool, analite, perlite, vermiculite, etc. are used.

These various inorganic fillers are mixed in an amount of 40 to 93.5 wt%, and if it is less than 40 wt%, cracks are likely to occur due to shrinkage, and if it exceeds 93.5 wt%, the strength will be insufficient. Among them, 52 to 86 wt% is preferable.

In addition, the coarse amorphous silicic acid powder mentioned above may be mixed into this, but except for very large particles, do not use powder that is likely to react with the alumina cement.
It is preferable that the amount is 10wt% or less, and if possible, the total amount with the amorphous silicic acid fine powder is 20wt% or less.
% or less is preferable for the reasons mentioned above.

The inorganic decorative material of the present invention contains the above-mentioned four components as main components, that is, alumina cement, amorphous silicic acid fine powder, alumina powder, and inorganic filler. Various additives may be added to improve the quality.

Dispersants, curing rate regulators, thickeners, water-reducing agents, adhesives, pigments, etc. can be used as additives, but organic substances such as water-soluble organic polymer substances, pulp, and resin emulsion can be used as solid components. The amount is 0 to 10 wt%, preferably 0 to 5 wt%, based on the total amount of the above main components. If it exceeds 10 wt%, the nonflammability tends to deteriorate significantly, which is not preferable, and in particular, 5 wt% or less is preferable.

In addition, it is preferable that these organic substances are not mixed except for specific uses, for example, when excellent waterproofness is required, or when the addition of a resin emulsion is required to form a special uneven pattern. Even when added, it is preferable to reduce the amount added as much as possible from the viewpoint of nonflammability.

In the present invention, all of the main components are solids such as powders or grains, so they are easy to store and transport.
Since it is sufficient to mix the required amount before use, it does not harden during storage. The raw materials for this main component are usually kneaded at the construction site with various additives and water added as necessary, and then applied to the building structure using known means for applying decorative materials such as brushing, troweling, rollers, and spraying. .

This construction is not limited to flat painting,
Forming unevenness naturally, applying it locally, forming uneven patterns using molds, engraving rollers, etc.
Various known construction methods can be used, such as multi-layered construction, sander cutting, roller pressing, etc., and a clear coat, top coat, etc. may be used in combination, if necessary.

In addition, it can be applied not only to on-site construction, but also to surface decoration in factories for precast concrete panels, asbestos slate, wood wool cement, and other building materials produced in factories, and can be used in various ways similar to the on-site construction described above. be done.

Next, an explanation will be given based on examples.

Example 1 Γ Alumina cement (“Alumina Cement No. 1” manufactured by our company) 3wt% Γ Desilicated zircon silica dust (particle size 0.1μ or less)
10wt% ΓCalcined alumina powder (diameter 40μ or less) 15wt% ΓMizusuri silica sand 32wt% ΓKansuite (1mm diameter) 40wt% Add 15wt% of water to the above mixture and knead, and mix asbestos slate to a thickness of 1.5mm. was applied and left at room temperature.

The adhesion strength after 24 hours was 21 Kg/cm ² , and the adhesion strength after 7 days was 40 Kg/cm ² , and strong adhesion was obtained despite no surface treatment, with no cracks occurring at all.

In addition, the adhesion strength after immersion in water and after repeated heating and cooling based on JISA6909 and JISA6910 is 19Kg/cm ² , respectively.
It was 37 Kg/cm ² and was excellent with no abnormality observed in the alkali resistance test (immersion in saturated calcium hydroxide solution for 48 hours).

Moreover, this adhesion strength was approximately 30% higher than that of a formulation containing no alumina powder.

Example 2 Γ alumina cement (“High Alumina Cement” manufactured by Denki Kagaku Kogyo Co., Ltd.) 3wt% Γ ferrosilicon dust (particle size 0.1μ or less)
10wt% Γ Calcined alumina powder (diameter 40μ or less) 5wt% Γ Mizusuri silica sand 51wt% Γ Kansuite (1mm diameter) 30wt% Γ Alkali-resistant glass fiber 5mm long chopped strand (our company's "Alpha Iver") 1wt% Add 16wt% of water to the above mixture and knead, GRC
It was applied onto a board to an average thickness of 2 mm and left at room temperature.

The adhesive strength after 24 hours was 17 Kg/cm ² , and the adhesive strength after 7 days was 35 Kg/cm ² , with no cracks occurring at all.

Example 3 Γ Alumina cement (“Alumina Cement No. 1” manufactured by our company) 3wt% Γ Amorphous silicate fine powder (“Vitaseal” manufactured by Taki Chemical Co., Ltd.) 3wt% Γ Calcined alumina powder (diameter 10μ or less) 10wt% Γ Mizusuri silica sand 43wt% ΓKansui stone (1mm diameter) 40wt% Γ stone Cotton 1wt% Add 30wt% of water to the above mixture and knead.
Spray applied to ALC board. The adhesion strength after 24 hours was 9 Kg/cm ² , and the adhesion strength after 7 days was 18 Kg/cm ² , with no cracks occurring at all.

As described above, the present invention can be made into a completely inorganic decorative material, which has excellent workability and adhesion strength, and can easily form an excellent decorative layer that is less prone to cracking. Various applications such as uneven shapes and multicolored patterns are possible.

Claims (1)

[Claims] 1 Alumina cement 0.5 to 10 wt% Amorphous silicic acid fine powder 1 to 20 wt% Alumina powder 5 to 30 wt% Inorganic filler 40 to 93.5 wt%, and amorphous Fine silicic acid powder/alumina cement ≧0.5, an inorganic decorative material with excellent adhesion. 2 Amorphous silicic acid fine powder/alumina cement≧1
An inorganic decorative material with excellent adhesion according to claim 1. 3 Alumina cement 1 to 8 wt% Amorphous silicic acid fine powder 3 to 15 wt% Alumina powder 10 to 25 wt% Inorganic filler 52 to 86 wt% Excellent inorganic cosmetic material. 4. The inorganic decorative material with excellent adhesion according to claim 1, wherein the amorphous silicic acid fine powder has a diameter of 1 μm or less.