JPH05318445A - Method for decorating inorganic building material - Google Patents

Abstract

PURPOSE:To obtain a decorative layer having sharp color forming properties and also excellent in weatherability. CONSTITUTION:An inorg. building material is decorated by such a process that the surface of an inorg. plate material molded from a cement compound is coated with a coloring material containing powdery org. pigment obtained by coating the surfaces of particles with a resin melted by the heat at the time of autoclave ageing and the coated inorg. plate material is aged and cured at temp. equal to or higher than the m.p. of the resin and the pigment is fixed to the coloring material using the molten resin as a binder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a makeup method for inorganic building materials.

[0002]

2. Description of the Related Art Conventionally, inorganic building materials made of cement compounds have been used very widely. This kind of inorganic building material,
Since the products of the same material and shape can be mass-produced and natural resources such as wood are not consumed, there is an advantage that is very convenient. However, if these building materials are as they are, the ground color is an achromatic color of grey-white to grey-black, so that they are poor in designability, and since they easily absorb water, it is necessary to carry out waterproofing treatment for outdoor building materials.

Therefore, it is customary to apply makeup of various colors to provide waterproofness. As this makeup means,
There are cases where the colored makeup is performed with the cement slurry in which the organic pigment is added to the surface, and cases where the colored makeup is performed with the cement slurry in which the inorganic pigment is added.

[0004]

[Problems of the prior art] Among the above-mentioned colored cosmetic materials, organic pigments are preferable in terms of imparting a design property because of their excellent coloring properties, but they have a problem in terms of weather resistance, and surface of cement building materials over time. Due to the deterioration of the pigment particles, the pigment particles were separated from the surface of the building material, and it appeared that the pigment particles had faded.

On the other hand, inorganic pigments, such as iron oxide pigments, do not have the above-mentioned problems in terms of weather resistance, but have a problem that they are poor in color developability and that a makeup layer having a clear color cannot be obtained. Therefore, the coloring of outdoor inorganic building materials can only be done with a light color and a dull color makeup layer, and if you want to have a dark vivid color, you must ignore the weather resistance and use an organic pigment was there.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a makeup method for an inorganic building material which is excellent in weatherability as well as having vivid color development.

[0007]

Means for Solving the Problems That is, the method of makeup of an inorganic building material of the present invention is a coloring material containing a powdery organic pigment obtained by coating the surface of a particle with a resin that is melted by heat during curing in an autoclave. It is characterized in that the surface of an inorganic plate material molded from the compound is coated, and then the inorganic plate material is cured and cured at a temperature equal to or higher than the melting temperature of the resin.

[0008]

The organic pigment having a good coloring property is used as the coloring material in the method of makeup of the inorganic building material of the present invention. However, this organic pigment has a problem in weather resistance as described above. Therefore, the organic pigment particles are coated with a thermoplastic resin, which is used as a cosmetic material on the surface of a cement product, and is melted by heat during autoclaving, so that it is applied in the state of baking coating.

As a result of the heat treatment as described above, the surface decorative layer can be colored vividly by the organic pigments, and at the same time, since each organic pigment is bound by the molten resin, the scattering is prevented and the aged peeling is effectively prevented. Therefore, it becomes possible to maintain a clear color for a long period of time.

[0010]

Embodiments of the present invention will be described below.

EXAMPLE Cyanine blue as an organic pigment and a melting temperature of 120 ° C. as a thermoplastic resin for coating the organic pigment particles
The transparent acrylic resin of 1. was prepared, 30 parts by weight of the pigment was added to 100 parts by weight of the heated and melted acrylic resin, and the mixture was uniformly stirred, and then fed to a granulator to form pellets. Further, the pellets were crushed into particles having an average particle size of 10μ.

This resin-coated organic pigment was added to a cement mixture consisting of 50% by weight of cement and 40% by weight of silica sand powder.
Add wt% and stir uniformly, add water to make a slurry,
Thickness on the surface of an inorganic board made of uncured cement compound
It was supplied to 1 mm and used as a decorative layer. This decorative inorganic board material 6
After the time natural curing, autoclave curing was performed under the condition of 130 ° C. × 12 hours.

Comparative Example 1 A decorative inorganic board material was obtained in exactly the same manner as in Example except that 2% by weight of cyanine blue which was not coated with resin was used.

Comparative Example 2 A decorative inorganic plate material was obtained in the same manner as in Example except that 8% by weight of cobalt blue was used as the inorganic pigment and this was used as the coloring pigment. When the fading test by the outdoor exposure was conducted on the above-mentioned Examples and Comparative Examples 1 and 2, the results shown in Table 1 were obtained. The numbers shown in Table 1 show the color difference, and the comparison value with that after the coating film disappears. The exposure period indicates the number of years since the surface coating film disappeared.

[0015]

[Table 1]

As is clear from Table 1, the composition of Example is slightly worse than Comparative Example 2 which uses an inorganic pigment,
It was confirmed that the weather resistance was extremely excellent as compared with Comparative Example 1 using the organic pigment. Further, the coloring was bright blue in the example, but was dull blue in the comparative example 2, and a clear difference in appearance was observed in the vivid difference.

[0017]

As described above, according to the present invention, since the organic pigment is used as the coloring pigment, the coloring of the difference in coloring can be made extremely clear, and the pigment particles are coated with the resin, Since the resin firmly bonds with the cement matrix forming the colored layer, peeling due to aging can be effectively prevented, and a long-term stable cosmetic effect can be maintained despite the use of organic pigments.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C09D 133/00 PGA 7921-4J

Claims (1)

[Claims] 1. A surface of an inorganic plate material molded from a cement mixture is coated with a coloring material containing a powdery organic pigment obtained by coating the surface of particles with a resin that is melted by heat during curing in an autoclave. A method for applying makeup to an inorganic building material, which comprises curing the inorganic plate material at a temperature equal to or higher than the melting temperature of the resin.