JPH09315878A - Surface treatment of inorganic plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly pigment a surface of an inorg. plate by applying a pigmenting slurry containing a β-1,3-glucan and the pigment on the surface of the green inorg. plate and subjecting the plate to curing-hardening. SOLUTION: A β-1,3-glucan of >=1wt.% is added to a pigmenting slurry containing the pigment to obtain the pigmenting slurry. After applying the pigmenting slurry on the surface of the green inorg. plate obtained by forming the aq. slurry containing cement, an aggregate and a fiber content at need to plate shape, the plate is left to stand at need at normal temp. for 25hr, and subjected to the curing-hardening at 150-200 deg.C for 7-15hr in an autoclave or subjected to the curing-hardening at 40-90 deg.C for 10-100hr in a steam atmosphere.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for an inorganic plate, and more specifically, for coloring the surface of an inorganic plate used for a building plate such as an outer wall or a roof tile in an uncured state. The present invention relates to a useful surface treatment method for an inorganic plate.

[0002]

2. Description of the Related Art Conventionally, as a surface treatment method for an inorganic plate, fine particles having various shapes are generally used.
Those that are colored by applying a coloring slurry containing a cement component to a pigment such as a mineral substance or organic solid powder that does not dissolve in various solvents such as alcohol on the surface of an uncured inorganic plate Was known.

[0003]

However, in such a surface treatment method for an inorganic plate, since the pigments aggregate with each other over time and the pigment and the cement component are separated from each other, the inorganic substance It was difficult to uniformly color the surface of the inorganic plate when applying it to the surface of the plate.

The present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a surface treatment method for an inorganic plate capable of uniformly coloring the surface of the inorganic plate. Especially.

[0005]

According to a first aspect of the present invention, there is provided a surface treatment method for an inorganic plate, which comprises applying a colored slurry containing a β-1,3 glucan to a surface of an uncured inorganic plate. It is characterized in that the inorganic plate is cured and hardened.

The surface treatment method for an inorganic plate according to claim 2 of the present invention is characterized in that a cement component is contained in the colored slurry.

The method for treating the surface of an inorganic plate according to claim 3 of the present invention is characterized in that the content of the β-1,3 glucan is 1 wt% or more based on the total solid content of the colored slurry. To do.

The surface treatment method for an inorganic plate according to a fourth aspect of the present invention is characterized in that the curing temperature for curing the inorganic plate by curing is 80 ° C. or higher.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

In the surface treatment method for an inorganic plate of the present invention, a coloring slurry containing β-1,3 glucan in a pigment is applied to the surface of an uncured inorganic plate for coloring, and the inorganic plate is cured by curing. It is a thing.

The above-mentioned pigments are fine particles having various shapes and generally do not dissolve in various solvents such as water, oil and alcohol. For example, a mineral substance or an organic solid powder can be used.

The β-1,3 glucan is a β-glucoside bond of D-glucose at the 1-3 position. It is known that when an aqueous suspension of 1 wt% or more of β-1,3 glucan is heated, a gel called a thermoreversible rosette gel is formed at 50 to 80 ° C. Furthermore, it is known to form a gel called a high-set gel which is irreversible at 80 ° C. or higher.

The above-mentioned β-1,3 glucan is an alkali
Calcium ion Ca in aqueous solution ²⁺, Magnesium
On Mg²⁺When coexisting with a polyvalent cation ion such as
It is also known to crosslink between molecules to form a gel.
Of.

The above-mentioned colored slurry contains the above-mentioned β-1,3 glucan in the above-mentioned pigment.
The colored slurry is applied and colored on the surface of the uncured inorganic plate.

Although the inorganic plate is not limited, it is formed by, for example, paper-making an aqueous slurry by a paper-making machine. Examples of the paper-making machine include Hatschek system and Fourdrinier system. And the like. As an example of the type of inorganic board, there is a cement-based ceramic board.

The above-mentioned aqueous slurry contains, for example, cement and aggregate as main components, and optionally contains a fiber component as an auxiliary component. As the cement, for example, ordinary Portland cement,
Early-strength Portland cement, moderate heat Portland cement, blast furnace cement, fly ash cement and the like are used.

As the aggregate, crushed stones such as granite and serpentine, silica stone powder, shirasu balloon, glass balloon, silica, pearlite, sand, and beads are used.

Further, as the fiber component, pulp powder or the like is usually used, but it is not limited to this. In addition, for example, cellulosic pulp fiber,
Mineral fibers such as asbestos, organic resin fibers such as polypropylene and vinylon, glass fibers, carbon fibers, and metal fibers can be used.

The materials for curing and curing the above-mentioned inorganic plate include, for example, autoclave curing and steam curing.

First, the above-mentioned autoclave curing is one of the curing curing carried out to obtain an inorganic plate. The curing is carried out in an autoclave, which is cured at 150 to 200 ° C. for 7 to 15 hours to obtain an inorganic plate.

The above steam curing is also one of the curing curing carried out to obtain the inorganic plate. The curing and curing method is performed in an atmosphere filled with water vapor, and in this atmosphere at a temperature of 40 to 90 ° C. and 10 to 1 ° C.
The cured product is cured for 00 hours to obtain an inorganic plate.

Before the autoclave curing and the steam curing, if necessary, the green sheet is heated at room temperature for 2 hours.
Left for ~ 5hr, then 40 ~ 90 filled with steam
A method of performing preliminary steam curing for 10 to 100 hours at a temperature of ° C may be appropriately adopted.

When curing the inorganic plate by curing
If the curing temperature is 80 ° C or higher,
Β-1,3 glucan in rally is not a component of inorganic plate
Calcium ion Ca²⁺, Magnesium ion M
g²⁺Reacts with and gels at 80 ° C or higher.
Highly water-resistant inorganic plate obtained by curing
Becomes In addition, the gel forms a film while holding the pigment.
And, as a result, reduce efflorescence
It is something that can be done. Especially in the colored slurry
Mention component is included, the above-mentioned calci
Um-ion Ca ²⁺, Magnesium ion Mg²⁺More
Therefore, it is more effective.

According to the present invention, the β-1,3 glucan contained in the colored slurry obtains the water contained in the uncured inorganic plate and swells effectively by using such a surface treatment method. For this reason, the pigment contained in the colored slurry is effectively prevented from agglomeration of the pigments and can be uniformly dispersed, and moreover, the pigment and the cement component are surely not separated from each other. As a result, when applied to the surface of the inorganic plate, the surface of the inorganic plate can be colored reliably and uniformly.

If the above-mentioned colored slurry contains a cement component, the calcium ion Ca of the cement component is added.
It reacts with ²⁺ and gels in the state where the pigments are dispersed with each other, and as a result, the aggregation of the pigments is stopped and the pigments can be dispersed more uniformly, and the pigment and the cement component can be separated from each other. To be more certain,
As a result, when applied to the surface of the inorganic plate, the surface of the inorganic plate can be colored more reliably and uniformly.

Further, when the content of the β-1,3 glucan is set to 1 wt% or more with respect to the total solid content of the colored slurry, the β-1,3 glucan is contained in the uncured inorganic plate by this amount. In order to effectively obtain the water contained in the swelling and to swell more effectively, the pigment contained in the colored slurry is more effectively prevented from agglomeration of the pigments and dispersed more uniformly. It is possible, moreover, since it is more surely separated from each other in the pigment and the cement component, as a result, when applied to the surface of the inorganic plate, the coloring of the surface of the inorganic plate is more surely achieved. And, it can be performed uniformly.

If the content of β-1,3 glucan is less than 1 wt% with respect to the total solid content of the colored slurry, the amount of β-1,3 glucan is too small, resulting in β- It is difficult for 1,3 glucan to effectively obtain the water content contained in the uncured inorganic plate, and as a result, it is difficult to prevent the pigments from coagulating, and it is also difficult to prevent the pigment and the cement component from separating from each other. When applied to the surface of the inorganic plate, it becomes difficult to uniformly color the surface of the inorganic plate.

When the colored slurry contains a cement component, the content of the β-1,3 glucan is 5 wt% with respect to the total solid content of the colored slurry.
With the above, the effects of the present invention can be obtained in the same manner, but the cost of β-1,3 glucan is increased, and the hardening of all the cement components including the cement component in the inorganic plate is β-1. , 3 glucans may cause a delay, and this point should be taken into consideration when necessary.

[0029]

Examples of the present invention will be described below.

Example 1 An uncured inorganic plate containing 5 wt% of asbestos obtained by Hatche Machine was prepared. On the surface of this inorganic plate, 93.5 parts by weight of class B blast furnace cement and 4.5 parts by weight of pigment were prepared. , Β-1,
After applying a coloring slurry having a concentration of 28 wt% consisting of 2.0 parts by weight of 3 glucan by 0.45 kg / m ² brush spraying and coloring, the surface is cured by steam curing at a temperature of 85 ° C. for 10 hours. A colored inorganic plate was obtained.

Next, with respect to the surface-colored inorganic plate, the uniformity of surface coloring and the efflorescence of the surface coloring layer (abbreviated as efflorescence) are visually inspected. Furthermore, the usable time of the colored slurry was examined at a temperature of 30 ° C.

As a result, the uniformity of the surface coloring was good, no eflation of the surface coloring layer was observed, and the usable time of the colored slurry was 120 minutes.

Example 2 Pigment 4. was formed on the surface of an inorganic plate obtained in the same manner as in Example 1.
The same procedure as in Example 1 was carried out except that a coloring slurry having a concentration of 28 wt% consisting of 5 parts by weight and 4.0 parts by weight of β-1,3 glucan was applied and colored by brush spraying at 0.30 kg / m ^2. A surface-colored inorganic plate was obtained.

Next, the surface-colored inorganic plate was examined in the same manner as in Example 1 for the uniformity of surface coloring, the eflation of the surface-colored layer, and the possible usage time of the colored slurry.

As a result, the uniformity of the surface coloring was good, no eflation of the surface coloring layer was observed, and the usable time of the colored slurry was infinite.

Comparative Example 1 A colored slurry having a concentration of 28 wt% consisting of 95.5 parts by weight of B-type blast furnace cement and 4.5 parts by weight of pigment was applied to the surface of an inorganic plate obtained in the same manner as in Example 1 for coloring. A surface-colored inorganic plate was obtained in the same manner as in Example 1 except for the above.

Next, the surface-colored inorganic plate was examined in the same manner as in Example 1 for uniformity of surface coloring, eflation of the surface-colored layer, and possible use time of the colored slurry.

As a result, the uniformity of the surface coloring was normal, eflation was observed in the surface coloring layer, and the usable time of the colored slurry was 90 minutes.

In Table 1 below, the uniformity of the surface coloring obtained in Examples 1 and 2 and Comparative Example 1, the eflation of the surface coloring layer, and the possible usage time of the colored slurry are shown and summarized. .

[0040]

[Table 1]

In Table 1, the item of the usable time of the colored slurry is shown as the usable time of the colored slurry.

In Table 1, the uniformity of the surface coloring and the eflation of the surface coloring layer are represented by ◯, Δ, and x. Specifically, ◯ represents a case where the uniformity of the surface coloring is good, and a case where the effluent of the surface coloring layer does not show the effluent. Δ represents a normal case of uniformity of surface coloring. The symbol x represents the case where the same effluent is observed in the efuro of the surface colored layer.

As can be seen by comparing Table 1 with those of Examples 1 and 2 and Comparative Example 1 by combining Table 1 with each other, the uniformity of the surface coloring of Examples 1 to 1 can be understood.
No. 2 is much better than that of Comparative Example 1, and a coloring slurry containing β-1,3 glucan in the pigment is applied to the surface of an uncured inorganic plate to be colored. When cured and cured, the β-1,3 glucan contained in the colored slurry obtains water contained in the uncured inorganic plate and swells effectively, so that the pigment contained in the colored slurry is effective. Agglomeration of the pigments is stopped together, and the pigments and the cement component can be dispersed evenly, and the pigment and the cement component are surely not separated from each other, and as a result, when applied to the surface of the inorganic plate, It can be said that the surface of the inorganic plate can be colored reliably and uniformly.

As can be seen by comparing Table 1 with those of Examples 1 and 2 and Comparative Example 1 by combining Table 1 with the above, in the efro of the surface coloring layer, 1 and 2 are considerably better than those of Comparative Example 1, and the curing temperature for curing the inorganic plate is
When the temperature is 80 ° C. or higher, β- in the applied colored slurry is
1,3 glucan reacts with calcium ion Ca ²⁺ and magnesium ion Mg ²⁺ , which are components of the inorganic plate,
It can be said that this gel forms a film in a state of holding the pigment, and as a result, efflorescence can be suppressed. Especially when the cement content is contained in the colored slurry, the above-mentioned calcium ion Ca ²⁺ and magnesium ion Mg ²⁺
It can be said that it is more effective because there are more.

As can be seen from the pot life of the colored slurries in Examples 1 and 2 and Comparative Example 1, when the cement content was used in the colored slurries, this was observed as time passed. It is considered that the cement component is hydrated, and after applying the colored slurry, the adhesive strength with the surface of the inorganic plate is reduced, and the usable time of the colored slurry is limited.

[0046]

According to the method for surface treatment of an inorganic plate according to claim 1 of the present invention, β-1, contained in the colored slurry,
In order that 3 glucan obtains water contained in the uncured inorganic plate and swells effectively, the pigments contained in the colored slurry effectively disperse the agglomeration of the pigments and disperse them evenly. In addition, since the pigment and the cement component are surely not separated from each other, as a result, when the pigment is applied to the surface of the inorganic plate, the surface of the inorganic plate is reliably and uniformly colored. You will be able to do it.

According to the method for surface treatment of an inorganic plate according to claim 2 of the present invention, in addition to the case of claim 1, in the state where the pigment reacts with calcium ions Ca ²⁺ and the pigments are dispersed in each other. As a result of gelation, the agglomeration of the pigments is stopped and the pigments can be more evenly dispersed, and the pigment and the cement component are more reliably separated from each other, resulting in the surface of the inorganic plate. When applied to, the surface of the inorganic plate can be colored more reliably and uniformly.

According to the surface treatment method for an inorganic plate according to claim 3 of the present invention, in addition to the case of claim 1 or 2, β-1,3 glucan is contained in the uncured inorganic plate. In order to effectively obtain water and swell even more effectively, the pigment contained in the colored slurry can be more effectively prevented from agglomeration of the pigments, and can be more uniformly dispersed, and Since the pigment and the cement component are more reliably separated from each other, as a result, when applied to the surface of the inorganic plate, the coloring of the surface of the inorganic plate is more reliable and uniform. It will be something that can be done.

According to the surface treatment method for an inorganic plate according to claim 4 of the present invention, in addition to the case of any one of claims 1 to 3, β-1,3 in the applied colored slurry is included.
Glucan calcium ion Ca ²⁺ that forms a component of inorganic board, reacted with magnesium ions Mg ^2+, and gelled, the gel is cured at 80 ° C. or higher, the resulting inorganic board water resistance Will be high. Further, the gel forms a film while holding the pigment, and as a result, can suppress efflorescence. In particular, when the cement content is contained in the colored slurry, the above-mentioned calcium ion Ca ²⁺ and magnesium ion Mg ²⁺ are more abundant, which is more effective.

Claims (4)

[Claims] 1. A surface of an inorganic plate, characterized in that a coloring slurry containing a β-1,3 glucan as a pigment is applied to the surface of an uncured inorganic plate for coloring, and the inorganic plate is cured by curing. Processing method. 2. The surface treatment method for an inorganic plate according to claim 1, wherein a cement component is contained in the colored slurry. 3. The surface of the inorganic plate according to claim 1 or 2, wherein the content of the β-1,3 glucan is 1 wt% or more based on the total solid content of the colored slurry. Processing method. 4. The surface treatment method for an inorganic plate according to claim 1, wherein a curing temperature when the inorganic plate is cured and cured is 80 ° C. or higher.