JPH0826812A - Inorganic composition - Google Patents

Abstract

PURPOSE:To obtain an inorganic composition, which is a hardenable inorganic composition, excellent in reactivity and water and weather resistances and capable of providing cells having a small and uniform size even in the case of a low-density inorganic expanded and hardened product. CONSTITUTION:This inorganic composition comprises 100 pts.wt. SiO2-Al2O3- based powder, 0.2-450 pts.wt. alkali metal silicate, 0.01-10 pts.wt. foaming agent, 35-1500 pts.wt. water, 0.1-100 pts.wt. alkylalkoxysilane represented by the following general formula [I] and 0.1-800 pts.wt. filler: R<1>nSi(OR<2>)4-n...[I] [R<1> is a 1-18C alkyl group; R<2> is a 1-5C alkyl group; (n) is a natural number of 1-3].

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an inorganic composition.

[0002]

2. Description of the Related Art Conventionally, an inorganic foamed and hardened material which is useful as a nonflammable building material and is lightweight and excellent in heat insulating property is a SiO ₂ -Al ₂ O ₃ type powder, an alkali metal silicate. It can be obtained by molding and curing an expandable inorganic composition composed of an aqueous solution, a filler and a foaming agent. However, in order to make the bubbles of the inorganic foam finer or uniform, the expandable inorganic composition is also available. Various studies have been made.

For example, Japanese Patent Laid-Open No. 4-6138 discloses that
A molded body is described in which an aqueous solution of an alkali metal silicate, an inorganic solid component and a filler are kneaded and then poured into a mold and cured by heating.

Further, in Japanese Patent Laid-Open No. 4-292482, S
By using a composition in which liquid silicone oil is added to a mixture of iO ₂ -Al ₂ O ₃ -based powder, an alkali metal silicate aqueous solution, a filler and a foaming agent in a predetermined ratio, the cell size is small and the hydrophobic property is high. It is described that an inorganic foamed and cured product having

[0005]

However, JP-A-4-6 has
Among the inorganic solid components described in Japanese Patent No. 138,
Fly ash (JISA 6201) and the like, which are industrial wastes and are required to be effectively used, have low reactivity with alkali and it is difficult to obtain a cured product having a quality suitable for building materials. In addition, the obtained cured product has water resistance,
The weather resistance was also low.

Further, the foamable inorganic composition as described in JP-A-4-292482 has a low density, particularly when an inorganic foam cured product having a density of 0.2 g / cm 3 or less is obtained, Since the cell size becomes 1 mm or more and the variation in cell size also becomes large, there is a problem that mechanical strength such as compressive strength and bending strength is lowered, and heat insulating property or water resistance is also lowered.

The present invention has been made in view of such circumstances, and an object thereof is a curable inorganic composition having excellent reactivity, water resistance and weather resistance, It is an object of the present invention to provide an inorganic composition which has a small cell size and can be uniform even if it is an inorganic foamed and cured product having a high density.

[0008]

In order to achieve such an object, the invention according to claim 1 provides an inorganic composition according to the present invention, wherein 100 parts by weight of SiO ₂ —Al ₂ O ₃ -based powder, 0.2-450 parts by weight of alkali metal silicate, 10 parts of water
To 1500 parts by weight and 0.01 to 75 parts by weight of the alkylalkoxysilane represented by the following general formula [I]. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3)

The invention according to claim 2 is SiO ₂ --Al ₂
100 parts by weight of O ₃ -based powder, 0.2-alkali metal silicate
450 parts by weight, 0.01 to 10 parts by weight of foaming agent, 35 to 35 parts of water
An inorganic composition containing 1500 parts by weight and 0.1 to 100 parts by weight of an alkylalkoxysilane represented by the following general formula [I]. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3)

According to a third aspect of the invention, SiO ₂ --Al ₂
100 parts by weight of O ₃ -based powder, 0.2-alkali metal silicate
450 parts by weight, 0.01 to 10 parts by weight of foaming agent, 35 to 35 parts of water
An inorganic composition comprising 1500 parts by weight, 0.1 to 100 parts by weight of an alkylalkoxysilane represented by the following general formula [I], and 0.1 to 800 parts by weight of a filler. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3)

The invention according to claim 4 is the inorganic composition according to claim 3, characterized in that an alkylalkoxysilane represented by the following general formula [I] is adsorbed on the filler. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, and n is a natural number of 1 to 3).

SiO ₂ --Al ₂ O ₃ used in the present invention
The composition of the powder system is 10 to 90% by weight of SiO ₂ , A
90% by weight of ₁₂ O ₃ is preferably used. Examples of such powder include fly ash,
Dust, metakaolin, pulverized and calcined bauxite, etc., can be used when producing the alumina-based abrasive, but they are not limited to these as long as the composition and particle size are appropriate.

The alkali metal silicate used in the present invention is represented by M ₂ O.nSiO ₂ (M = Li, K, Na or a mixture thereof), and preferably n = 0.05 to 8. , N = 0.1-3 are more preferable, and n =
Those of 0.5 to 2.5 are particularly preferable. That is, when n exceeds 8, the aqueous solution of the alkali metal silicate is apt to cause gelation and the viscosity rapidly rises, which may make it difficult to mix with the powder.

The concentration of the alkali metal silicate aqueous solution when the alkali metal silicate is made into an aqueous solution and mixed is not particularly limited, but if it is high, a viscosity suitable for foaming cannot be obtained,
On the other hand, if it is thin, excess water will cause a large curing shrinkage and a decrease in strength, so about 10 to 70% by weight is preferable. Alkali metal silicate is SiO ₂ -Al ₂
It is necessary to add 0.2 to 450 parts by weight to 100 parts by weight of O ₃ based powder, but the preferable addition amount is 10 to 35 parts by weight.
0 parts by weight, more preferably 20 to 250 parts by weight.

If the amount added is less than 0.2 parts by weight, the amount of alkali necessary for the reaction is too small, resulting in poor curing. Conversely, if it exceeds 450 parts by weight,
Since the amount of the curing agent is large, there is a problem in the water resistance of the inorganic molded body.

In order to obtain an alkali metal silicate aqueous solution, the alkali metal silicate may be dissolved in water as it is. However, in the alkali metal hydroxide aqueous solution, silica sand, silica stone powder or other SiO ₂ is added.
The components may be dissolved so that n becomes a predetermined value.

Examples of the foaming agent include peroxides such as hydrogen peroxide, sodium peroxide, potassium peroxide and sodium perborate, or Mg, Ca, Cr, Mn, Fe and C.
Metal powders such as o, Ni, Cu, Zn, Al, Ga, Sn, Si, and ferrosilicon are listed, and cost, safety,
Of these, hydrogen peroxide and aluminum powder are preferable in view of easy availability and easy mixing.

The above-mentioned foaming agent is added in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the SiO ₂ —Al ₂ O ₃ powder, and the addition amount is determined by the density of the desired foam.
That is, if the addition amount exceeds 10 parts by weight, the foaming gas becomes excessive and the bubbles are broken, and if it is less than 0.01 parts by weight, the expansion ratio is too small and the meaning of the foam is lost. When hydrogen peroxide is used as a foaming agent, it is preferable to use it as an aqueous solution. The concentration of the aqueous hydrogen peroxide solution that can be used as a foaming agent is 0.
5 to 35%, preferably 1 to 25%, more preferably 5
~ 15%. If the concentration exceeds 35%, foaming will be too fast, stable foaming will not be possible, and it is dangerous. On the other hand, if the concentration is less than 0.5%, the amount of water will be too large relative to the amount of hydrogen peroxide, and the viscosity will decrease, which may result in unstable foaming.

When the metal powder is used as the foaming agent, it is preferable that the average particle size is 1 to 200 μm. That is, if the average particle diameter exceeds 200 μm, the reactivity is lowered, and if it is less than 1 μm, the dispersibility is lowered, and the reactivity is increased and foaming may be too fast.

The amount of water added is 35 to 1500 parts by weight, preferably 45 to 1000 parts by weight in the foamable inorganic composition, relative to 100 parts by weight of the SiO ₂ -Al ₂ O ₃ type powder.
Parts by weight, more preferably 50 to 500 parts by weight. That is, when the addition amount exceeds 1500 parts by weight, the viscosity is lowered and the foaming is not stable, and the strength is lowered, and when the addition amount is less than 35 parts by weight, the viscosity is increased and the foam is not stable, or the high density low density foamed product is used. Can't get

Further, in the non-foaming inorganic composition,
The amount is 10 to 1500 parts by weight, preferably 10 to 1000 parts by weight, and more preferably 10 to 500 parts by weight. That is,
When the addition amount exceeds 1500 parts by weight, the mechanical strength of the obtained inorganic cured product decreases, and when it is less than 10 parts by weight, it becomes difficult to mix with the inorganic powder.

General formula: R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
As the alkylalkoxysilane represented by an alkyl group of 5 to 5 and n is an integer of 1 to 3, R ¹ is preferably a linear alkyl group having 6 or more carbon atoms. That is, when it is less than 6, the water resistance tends to be small.

The amount of alkylalkoxysilane added is SiO ₂ --Al ₂ O _{3 in the} foamable inorganic composition.
The amount is 0.1 to 100 parts by weight, preferably 1 to 50 parts by weight, and more preferably 5 to 30 parts by weight with respect to 100 parts by weight of the system powder. That is, when the addition amount exceeds 100 parts by weight, the viscosity is lowered, the bubbles are coarsened, and the strength is lowered. On the other hand, if the addition amount is less than 0.1 parts by weight, there is no effect and the bubbles are coarsened, and sufficient water resistance and weather resistance cannot be obtained.

Further, in the non-foaming inorganic composition,
With respect to 100 parts by weight of SiO ₂ —Al ₂ O ₃ based powder, 0.
01 to 75 parts by weight, preferably 0.01 to 50 parts by weight,
More preferably, it is 0.01 to 30 parts by weight. That is, if the addition amount exceeds 75 parts by weight, curing inhibition occurs and the mechanical strength of the obtained cured product decreases. On the other hand, if the addition amount is less than 0.01 parts by weight, there is no effect and sufficient water resistance and weather resistance cannot be obtained.

The alkylalkoxysilane represented by the above general formula [I] is specifically exemplified. When n is 1, for example, n-decyltrimethoxysilane, methyltrimethoxysilane and n-propyl are used. Trimethoxysilane, n-hexyltrimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, iso-butyltrimethoxysilane, methyltri-n-propoxysilane, methyltri-iso-propoxysilane, methyltri-n-butoxysilane, methyltri , Sec-butoxysilane, methyltri-tert-butoxysilane, ethyltriethoxysilane, phenyltriethoxysilane, methacryoxypropyltrimethoxysilane,
Examples thereof include mercaptopropyltrimethoxysilane, octadecyltrimethoxysilane and octadecyltriethoxysilane.

When n is 2, for example, dimethyldiethoxysilane, dimethyldimethoxysilane, dimethyldi-
n-propoxysilane, dimethyl-iso-propoxysilane, dimethyldi-n-butoxysilane, dimethyldi-sec-butoxysilane, dimethyldi-tert-butoxysilane, diethyldiethoxysilane, ethylphenyldiethoxysilane, diphenyldimethoxysilane,
Examples thereof include diphenyldiethoxysilane and γ-glycidoxypropylmethyldiethoxysilane.

When n is 3, for example, trimethylmethoxysilane, trimethylethoxysilane, trimethyl-
n-propoxysilane, trimethyl-iso-propoxysilane, trimethyl-n-butoxysilane, trimethyl-sec-butoxysilane, trimethyl-tert-
Examples thereof include butoxysilane, triethylethoxysilane, diethylphenylethoxysilane, γ-glycidoxypropylethylmethylethoxysilane and the like.

The alkylalkoxysilane represented by the above-mentioned general formula [I] is used not only as a silane component of 100% but also in water, depending on the material composition and purpose of use.
You may use the silane component manufactured as a composite compound mix | blended the solvent, such as alcohol, and an emulsifier.

As the filler used in the present invention, any filler such as an inorganic filler and an organic filler can be used. When the water repellent agent comprising the above alkylalkoxysilane is adsorbed and used, the water repellent agent is used. In order to impart a chemical bond with, the inorganic filler is preferably an oxide-based filler, and the organic filler is preferably vinylon or the like having an OH group on the surface, but is not particularly limited thereto.

When an inorganic filler is used, it is preferable that it has a low activity with respect to an alkali metal silicate aqueous solution. These inorganic fillers reduce shrinkage during curing, improve slurry fluidity, and make cells dense. , Silica bubbles, stabilization of bubbles, and the like, for example, silica sand, zircon sand, crystalline alumina, rock powder, volcanic ash (shirasu, anti-fire stone, etc.), calcium carbonate, silica stone powder, fly ash, diatomaceous earth,
Examples thereof include mica, talc, wollastonite, silica fume, calcium carbonate, aerosil, silica gel, zeolite, activated carbon and alumina gel.

Further, for the purpose of reducing the weight, there may be mentioned silica balloons, perlite, fly ash balloons, shirasu balloons, glass balloons, inorganic natural foams such as foamed clay, etc. If activity is low, it will not be limited to these.

The reason why it is desired that the inorganic filler has low activity with respect to the alkali metal silicate aqueous solution is that when the activity is high, gelation of the alkali aqueous solution and the alkali metal silicate aqueous solution proceeds rapidly, and mixing and molding can be performed. It will be difficult.

Further, as the organic filler, phenol resin, urethane resin, polyethylene, vinylidene chloride,
Examples thereof include synthetic resins such as styrene and foams thereof, but are not limited thereto. These may be added alone or in combination of two or more.

The amount of the filler added is SiO ₂ −.
0.1 to 800 for 100 parts by weight of Al ₂ O ₃ based powder
It is limited to parts by weight, preferably 1 to 600 parts by weight, more preferably 40 to 400 parts by weight. If the addition amount of the filler is large, the mechanical strength is lowered, and if the addition amount is small, the desired amount of the water repellent cannot be adsorbed, and in addition, effects such as curing shrinkage and crack suppression, which are the original characteristics of the filler, can be obtained. Disappear.

The filler has an average particle diameter of 0.01 μm.
It is preferable that the particle size be 5 mm or less. That is, when the average particle size exceeds 5 mm, the foaming becomes unstable and 0.01
If it is less than μm, the viscosity may increase due to an increase in the amount of adsorbed water, resulting in a decrease in workability or insufficient foaming.

If the specific gravity of the filler made of foam used for the purpose of reducing the weight is less than 0.01, the mechanical strength of the molded body is lowered, and if it exceeds 1, the weight reducing effect is obtained. The specific gravity is 0.01-1
Those having a specific gravity of 0.02 to 0.
7

In the present invention, reinforcing fibers and foaming aids may be further added, if necessary.

The reinforcing fiber can improve strength, prevent cracks, and the like. For example, vinylon, polypropylene,
Examples thereof include organic fibers such as aramid, acrylic and rayon, and inorganic fibers such as carbon, glass, potassium titanate, alumina, steel and slag wool. Further, when adsorbing the water repellent to the filler, a method of mixing reinforcing fibers with the filler and adsorbing the water repellent to the filler may be used. The preferred fiber length of the reinforcing fibers added is 1
˜15 mm, preferred fiber diameter is 1 to 500 μm.

If the fiber length exceeds 15 mm, the dispersibility is reduced, and if the fiber diameter is less than 1 μm, it may be re-aggregated during mixing to form a fiber ball and the strength may not be improved. Is the fiber length less than 1 mm? When the fiber diameter exceeds 500 μm, the reinforcing effect is small. The amount of reinforcing fiber added is S
It is preferably 10 parts by weight or less based on 100 parts by weight of the iO ₂ -Al ₂ O ₃ based powder. That is, if it exceeds 10 parts by weight, the dispersibility of the fibers may be lowered.

The foaming aid can stabilize foaming, and is, for example, porous powder such as silica gel, zeolite, activated carbon, alumina gel, or a surfactant such as fatty acid metal salt, such as stearic acid. Examples thereof include metal soaps such as metal salts and metal salts of palmitate, preferably zinc stearate, calcium stearate, and aluminum stearate.

The amount of the foaming aid added is 5 parts by weight or less, preferably 0.05 to 5 parts by weight, and more preferably 0.3 to.
3.0 parts by weight. That is, if the addition amount exceeds 5% by weight, the viscosity increases, which adversely affects the foaming.
When the amount is less than the weight part, there is a possibility that foaming may occur, the foaming may not be stable, and the strength may be reduced, the viscosity may be high, and the foaming may not occur.

As a method for forming an inorganic hardened material or an inorganic foamed hardened material from the inorganic composition of the present invention, an alkali metal silicate is dissolved in water under heating and pressure and then Si is added.
O ₂ -Al ₂ O ₃ powder, alkylalkoxysilane,
And, if necessary, inorganic fillers, reinforcing fibers, foaming aids,
It is preferable that the organic foam and the inorganic foam are kneaded to form a paste, and hydrogen peroxide water is added and mixed.

The slurry thus obtained is cast or sprayed to foam. The inside of this foam becomes hot due to the decomposition heat of hydrogen peroxide. It is preferable to heat and cure this at 40 to 90 ° C. in a high temperature inside. If the curing temperature is 40 ° C. or lower, the reaction does not sufficiently occur, and the strength of the cured product obtained is not sufficient, and if the curing temperature is 100 ° C. or higher, the bubbles may expand and break.

[0044]

According to the above constitution, by adding a predetermined amount of alkylalkoxysilane, water resistance and weather resistance are imparted, and when this is used as a foamable composition, the viscosity of the composition is such that bubbles are small. It can be maintained at a reasonable level. Therefore, when this composition is molded and cured, it is possible to obtain an inorganic cured product having excellent water resistance and weather resistance. When this composition is further foamed and cured, the inorganic substance has small bubbles even if it has a low density. A foamed cured product can be obtained.

[0045]

EXAMPLES The present invention will be described in detail below with reference to Examples and Comparative Examples. (SiO ₂ —Al ₂ O ₃ system powder) A: Metakaolin (SATINT manufactured by Engelhard)
ONE SP 33) B: 1.7 kg of metakaolin of the above-mentioned SiO ₂ —Al ₂ O ₃ -based powder 1 was manufactured by Mitsubishi Heavy Industries, Ltd. under the trade name “Ultra Fine Mill AT-20” (using 10 mmφ zirconia balls, ball filling rate 85). %, A mixture of 25% triethanolamine-75% ethanol as a grinding aid was added to 10 g), and 9.9 kwh / kg (3 hours × 3.3 k)
(w / kg) mechanical energy was applied. C: Fly ash (manufactured by KANDENKA CORPORATION, average particle size 20μ
m; according to JIS A 6201) to obtain fly ash containing 100% of powder having a particle size of 10 μm or less.

SiO ₂ --Al ₂ O ₃ system powder A, Si
The composition and particle size of the O ₂ —Al ₂ O ₃ based powder B and the SiO ₂ —Al ₂ O ₃ based powder C were as shown in Table 1 below.

[0047]

[Table 1]

(Alkali metal silicate aqueous solution) Potassium silicate aqueous solution (manufactured by Nippon Kagaku Kogyo Co., molar ratio SiO
₂ : K ₂ O = 1.4: 1, 42% by weight)

(Alkylalkoxysilane) a. n-decyltrimethoxysilane b. n-decyltriethoxysilane c. Methyltrimethoxysilane d. Methyltriethoxysilane e. n-propyltrimethoxysilane f. n-propyltriethoxysilane g. n-hexyltrimethoxysilane h. n-hexyltriethoxysilane i. Dimethyldiethoxysilane j. Trimethylmethoxysilane k. Trimethylethoxysilane l. Phenyltrimethoxysilane m. iso-butyltrimethoxysilane n. Octadecyltrimethoxysilane o. Octadecyltriethoxysilane p. Dimethyl silicone oil q. Tetramethoxysiloxane

(Filler) 1: No. 8 silica sand (manufactured by Sekimoto Kenzai Co., Ltd.) 2: Silica powder (manufactured by Sumitomo Cement Co., trade name: Fine silica; Blaine value 10000 cm ² / g) 3: Talc (manufactured by Sanyo Clay Industry Co., Ltd.) , Product name: Talc 8
3, average particle size 5 μm) 4: mica (trade name: Szolite mica 325S, average particle size 40 μm) 5: wollastonite (manufactured by Tsuchiya Kaolin Co., Ltd., product name: Chemolit A-60) 6: fine silica sand (Marubeni company) Made, average particle size 10 μm) 7: fly ash (manufactured by Kanden Kako, JIS A 62)
01 equivalent)

(Reinforcing fiber). Vinylon fiber (Kuraray Co., Ltd., trade name: RM182,
Fiber length 3 mm, fiber diameter 14 μm). Polypropylene fiber (manufactured by Daiwa Spinning Co., Ltd., product name: PZ
L 2d x 6mm)

(Foaming auxiliary agent) Zinc stearate (manufactured by Wako Pure Chemical Industries, Ltd.)

(Foaming agent) α: Aluminum powder (manufactured by Minarco, trade name: 350)
F, particle size 70 μm or less) β: Hydrogen peroxide solution (Mitsubishi Gas Chemical Co., Ltd., 35% product diluted to 10% concentration)

(Examples 1 to 17), (Comparative Examples 2 and 3) With respect to 100 parts by weight of SiO ₂ -Al ₂ O ₃ -based powder shown in Table 1, potassium silicate as an alkali metal silicate and water were added. An aqueous potassium silicate solution consisting of the above, an alkylalkoxysilane of the types shown in Tables 2 to 4, silica sand No. 8 and silica stone powder were supplied to an omni mixer in the amounts shown in Tables 2 to 4 and mixed for 5 minutes. The resulting mixture is 150 x 50 x 1
It was poured into a 0 mm mold, heated together with the mold in a hot air dryer at 85 ° C. for 10 hours, demolded, and further dried at 50 ° C. for 10 hours to obtain an inorganic cured product.

(Comparative Examples 1, 4 and 5) In the same manner as in Example 1 above, inorganic hardened materials were obtained in the amounts shown in Table 5.

(Examples 18 to 21) SiO ₂ shown in Table 1
-Al ₂ O ₃ -based powder 100 parts by weight, an aqueous solution of potassium silicate consisting of the above-mentioned potassium silicate as an alkali metal silicate and water, and an alkylalkoxysilane of the kind shown in Table 5, talc, mica and wollast. The above-mentioned filler such as knight, the reinforcing fiber, and the foaming aid were mixed and stirred with a hand mixer in a blending amount shown in Table 5 to obtain a uniform paste.
Next, as shown in Table 5, hydrogen peroxide solution (produced by Mitsubishi Gas Chemical Co., Inc., 35% product was diluted to 1% by dilution with this paste)
Concentration) and mixed for about 1 minute. next,
The above paste is poured into the mold, the mold is sealed, then heated at 85 ° C. for 10 hours, and after demolding, the mixture is further heated at 50 ° C. for 1 hour.
A dried inorganic cured product was obtained by drying for 0 hours. The obtained foam was cut into 150 × 50 × 10 mm.

(Examples 22 to 25) Foamed inorganic cured products were obtained in the same manner as in Example 18, except that the foaming agent of Example 18 was changed to aluminum powder and the formulations shown in Tables 6 to 7 were used. . The resulting foam is 50x50x50
Cut into mm.

Comparative Example 6 A foamed inorganic cured product was obtained in the same manner as in Example 18 according to the formulation shown in Table 7.
The obtained foam was cut into 50 × 50 × 50 mm.

Comparative Example 7 A foamed inorganic cured product was obtained in the same manner as in Example 22 according to the formulation shown in Table 7.
The obtained foam was cut into 50 × 50 × 50 mm.

The inorganic cured product thus obtained was evaluated by the following methods. The results are shown in Tables 2-7.

1. Contact angle of water: The contact angle between the surface of the inorganic cured body and water when water having a diameter of 2 mm is dropped on the surface of the obtained inorganic cured body, CONTACT- manufactured by Kyowa Interface Science Co., Ltd.
It was measured with ANGLEMTER (trade name).

2. Water absorption: 2 in a hot air dryer at 105 ° C
From the weight (a) of the cured inorganic material dried for 4 hours and the weight (b) of the cured inorganic material immersed in water at 20 ° C. for 24 hours, the water absorption was measured by the following formula. [(B−a) / a] × 100 (% by weight)

3. Hot water test: 9
After immersing in hot water at 8 ° C for 2 hours and then drying for 24 hours, visually observing the appearance, ◯ indicates that there is no abnormality, and x indicates that there is abnormality such as powder on the surface. It was attached and evaluated.

4. Accelerated weathering test: The obtained inorganic cured product is subjected to an accelerated weathering test for 500 hours in accordance with JIS K 5400, and its appearance is visually observed. Those having abnormalities such as being evaluated were evaluated by marking X.

[0065]

[Table 2]

[0066]

[Table 3]

[0067]

[Table 4]

[0068]

[Table 5]

[0069]

[Table 6]

[0070]

[Table 7]

It is clear from Tables 2 to 7 that according to the inorganic composition of the present invention, it is possible to obtain an inorganic foamed and cured product having good water resistance and weather resistance.

(SiO ₂ -Al ₂ O ₃ system powder) D: Liash containing 100% of lyash having a particle size of 10 μm or less E: Dust when producing an alumina-based abrasive F: Metakaolin (Engelhard) Made SATINT
ONE SP 33) three types of SiO ₂ -Al ₂ O ₃
A system powder was prepared. Grace, SiO ₂ -Al ₂ O ₃ system powder D, SiO ₂ -Al ₂
The composition and particle size of the O ₃ based powder E and the SiO ₂ —Al ₂ O ₃ based powder F were as shown in Table 5.

[0073]

[Table 8]

(Examples 26 to 39), (Comparative Examples 8 to 1)
2) With respect to 100 parts by weight of the SiO ₂ —Al ₂ O ₃ -based powder shown in Table 8, potassium silicate as an alkali metal silicate (SiO ₂ : A in a molar ratio) was used according to the composition shown in Tables 9 to 11.
1 ₂ O ₃ = 1.5: 1) 60 parts by weight and 80 parts by weight of water, potassium silicate aqueous solution (42% aqueous solution),
And the amounts and types of alkylalkoxysilanes shown in Tables 9 to 11, talc (manufactured by Sanyo Clay Industry Co., Ltd., talc 83, average particle size 5 μm), mica (trade name: Szolite mica
325S, average particle diameter 40 μm), polypropylene fiber (manufactured by Daiwa Boshoku Co., Ltd., trade name: PZL, 2d × 6 mm), zinc stearate (manufactured by Wako Pure Chemical Industries, Ltd.), mixed and stirred with a hand mixer to form a uniform paste. did. Next, as shown in Tables 9 to 11, this paste was prepared by dispersing or dissolving 3.5 parts by weight of hydrogen peroxide as a foaming agent in 31.5 parts by weight of water (manufactured by Mitsubishi Gas Chemical Company, 35 % Product was diluted to 10% concentration) and mixed for about 10 seconds. Next, the above-mentioned paste was poured into a container and left standing to cause foaming gradually, which was completed in about 5 minutes after mixing and stirring. Then, it hardened at 50 degreeC for 24 hours, and produced the inorganic foam hardening body. 50 x the obtained inorganic foam cured product
It was cut into 50 × 30 mm.

The physical properties (density, average cell diameter, water absorption) of the foam thus obtained were investigated, and the results are shown in Tables 9 to 1.
1 is also shown. The average cell diameter was calculated by taking an enlarged photograph of the foam with a microscope and measuring the diameter of 50 cells. Regarding the water absorption rate, the foam is 2 cm below the water surface.
It was immersed for 4 hours, and the difference in mass between before and after the immersion was divided by the volume of the foam, and the result was expressed as volume%.

[0076]

[Table 9]

[0077]

[Table 10]

[0078]

[Table 11]

From Tables 9 to 11, it is clear that the foamable inorganic composition of the present invention can give an inorganic foamed cured product having small bubbles and less water absorption even if the density is low.

(Examples 40 to 53), (Comparative Examples 13 to 2)
0) To 100 parts by weight of SiO ₂ —Al ₂ O ₃ -based powder shown in Table 8, potassium silicate as an alkali metal silicate (SiO ₂ : A in a molar ratio) was used in accordance with the composition shown in Tables 12 to 16.
1 ₂ O ₃ = 1.5: 1) aqueous solution (42% aqueous solution)
And types of alkylalkoxysilanes shown in Tables 12 to 16, talc (manufactured by Sanyo Clay Industry Co., Ltd., talc 83, average particle size 5 μm), mica (trade name: Szolite mica 32
5S, average particle size 40 μm, fine silica sand (manufactured by Marubeni Corporation, average particle size 10 μm), wollastonite (manufactured by Tsuchiya Kaolin Co.,
Chemolit A-60), fly ash (FA in the table)
Notation: KANDEN KAKO, JIS A 6201 equivalent), vinylon fiber (Kuraray, RM182, 1.8)
d × 6 mm), zinc stearate (manufactured by Wako Pure Chemical Industries, Ltd.) and the remaining water were added and mixed and stirred with a hand mixer to obtain a uniform paste. Next, as shown in Tables 12 to 16, hydrogen peroxide solution (manufactured by Mitsubishi Gas Chemical Co., Inc., 35% product) was added to the paste and mixed for about 10 seconds. next,
When the above paste was poured into a container and left to stand, foaming gradually occurred, and it was completed in about 5 minutes after mixing and stirring. Then, it was cured at 50 ° C. for 24 hours to prepare an inorganic foam cured product. 50 x 50 x 50 mm of the resulting inorganic foam cured product
Disconnected.

(Examples 54 to 62) SiO ₂ shown in Table 8
-Al ₂ O ₃ based powder 100 parts by weight, Tables 14 to 15
In accordance with the composition shown in (1), an aqueous solution of potassium silicate (having a molar ratio of SiO ₂ : K ₂ O = 1.5: 1) as an alkali metal silicate (42% aqueous solution), and vinylon fiber (RM182, manufactured by Kuraray Co., Ltd.). 1.8d × 6 mm), zinc stearate (manufactured by Wako Pure Chemical Industries, Ltd.) and the remaining water were added, and mixed and stirred with a hand mixer to obtain a uniform paste. Next, in this paste, talc (manufactured by Sanyo Clay Industry Co., Ltd., talc 83, average particle size 5 μm), mica (Suzolite mica 325S, average particle size 40 μm), and finely divided silica sand (manufactured by Marubeni Corp., average) Particle size 10 μm), wollastonite (Kemorit A-60 manufactured by Tsuchiya Kaolin Co., Ltd.) and fly ash (indicated as FA in the table: Kanden Co., Ltd. JIS)
A 6201 equivalent product) to which a predetermined amount of n-decyltrimethoxysilane was adsorbed was added, mixed and stirred, and a uniform paste was obtained again. In addition, add this paste to Tables 14-15
As shown in, a hydrogen peroxide solution (35% product manufactured by Mitsubishi Gas Chemical Co., Inc.) was added as a foaming agent and mixed for about 10 seconds. Next, the above-mentioned paste was poured into a container and left standing to cause foaming gradually, which was completed in about 5 minutes after mixing and stirring. Then, it was cured at 50 ° C. for 24 hours to prepare an inorganic foam cured product. 50 x 50 x 50 of the resulting inorganic foam cured product
Cut into mm.

(Examples 63 to 64) SiO ₂ shown in Table 8
According to the composition shown in Table 15, potassium silicate as an alkali metal silicate (having a molar ratio of SiO ₂ : K ₂ O = 1.5: 1) with respect to 100 parts by weight of Al ₂ O ₃ based powder.
An aqueous solution (42% aqueous solution), zinc stearate (manufactured by Wako Pure Chemical Industries, Ltd.) and the remaining water were added, and mixed and stirred with a hand mixer to obtain a uniform paste. Next, the talc shown in Table 15 (Talc 83, manufactured by Sanyo Clay Industry Co., Ltd.
Average particle size 5 μm), mica (trade name: Suzolite mica 325S, average particle size 40 μm), fine silica sand (manufactured by Marubeni, average particle size 10 μm), wollastonite (Tsuchiya Kaolin, chemorit A-60), Fly ash (indicated as FA in the table: JIS A 6201, manufactured by KANDENKA CORPORATION)
Equivalent product) and vinylon fiber (Kuraray Co., Ltd., trade name: RM)
182, 1.8 d × 6 mm) adsorbing a predetermined amount of n-decyltrimethoxysilane was admixed, mixed and stirred, and again made into a uniform paste. Further, as shown in Table 15, hydrogen peroxide solution (35% by Mitsubishi Gas Chemical Co., Inc.) was added to this paste as a foaming agent and mixed for about 10 seconds. next,
When the above paste was poured into a container and left to stand, foaming gradually occurred, and it was completed in about 5 minutes after mixing and stirring. Then, it was cured at 50 ° C. for 24 hours to prepare an inorganic foam cured product. 50 x 50 x 50 mm of the resulting inorganic foam cured product
Disconnected.

The physical properties (density, average cell diameter, water absorption) of the foam thus obtained were examined, and the results are shown in Table 12-.
16 is also shown. The average cell diameter was calculated by taking an enlarged photograph of the foam with a microscope and measuring the diameter of 50 cells. Also, regarding the water absorption rate, the foam is 24
The difference in mass between after immersion and before immersion was divided by the volume of the foam, and expressed as volume%. The specific gravity of the obtained foam is 100
It was calculated by measuring the weight after drying at -24 hours.

[0084]

[Table 12]

[0085]

[Table 13]

[0086]

[Table 14]

[0087]

[Table 15]

[0088]

[Table 16]

From Tables 12 to 16, it is clear that the foamable inorganic composition of the present invention can give an inorganic foamed cured product having small bubbles and small water absorption even if the density is low.

[0090]

EFFECTS OF THE INVENTION Since the inorganic composition according to the present invention is constituted as described above, it has small bubbles even at a low density, is uniform, has excellent heat retention, water resistance and weather resistance, and is useful as a nonflammable building material. A foamed cured product can be obtained.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C04B 24:00 14:06 Z 16:06) A 103: 48 103: 65 111: 28 111: 40 (72) Inventor Shogaku Kamiya 2-2, Kamitobagami-chokocho, Minami-ku, Kyoto City Sekisui Chemical Co., Ltd.

Claims (4)

[Claims] 1. A SiO ₂ —Al ₂ O ₃ -based powder 100 parts by weight, an alkali metal silicate 0.2 to 450 parts by weight, and water 10.
To 1500 parts by weight and 0.01 to 75 parts by weight of the alkylalkoxysilane represented by the following general formula [I]. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3) _2. 100 parts by weight of SiO ₂ —Al ₂ O ₃ -based powder, 0.2 to 450 parts by weight of alkali metal silicate, 0.01 to 10 parts by weight of foaming agent, 35 to 1500 parts by weight of water, and An inorganic composition containing 0.1 to 100 parts by weight of an alkylalkoxysilane represented by the general formula [I]. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3) 3. SiO ₂ —Al ₂ O ₃ powder 100 parts by weight, alkali metal silicate 0.2 to 450 parts by weight, foaming agent 0.01 to 10 parts by weight, water 35 to 1500 parts by weight, An inorganic composition comprising 0.1 to 100 parts by weight of an alkylalkoxysilane represented by the general formula [I] and 0.1 to 800 parts by weight of a filler. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3) 4. The inorganic composition according to claim 3, wherein an alkylalkoxysilane represented by the following general formula [I] is adsorbed on the filler. R ¹ _n Si (OR ² ) _4-n ... [I] (R ¹ is an alkyl group having 1 to 18 carbon atoms, R ² is 1 carbon atom
To 5 alkyl groups, n is a natural number of 1 to 3)