JPH0437213B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a building material, and particularly to a building material suitable for use in external walls and water areas.

[Conventional technology]

Building materials used for exterior walls and water areas such as kitchens and bathrooms are required to have bactericidal and algae-proofing effects due to the environmental conditions in which they are used.
As is well known, copper has bactericidal and antialgal properties, and for this reason, building materials with copper attached to their surfaces can prevent the growth of microorganisms and algae.

As mentioned above, conventional techniques for using copper in construction materials include adding powdered copper and copper compounds to gypsum board (Japanese Patent Application Laid-Open No. 18705/1982), and using an aqueous solution of copper sulfate to create copper sulfate. A product in which wallpaper fibers are impregnated with (Japanese Patent Application Laid-Open No. 61-201100) is known. These conventional techniques are advantageous in terms of cost and work efficiency compared to the case where copper is made into a thin plate and fixed to a building material, but on the other hand, the following problems occur.

[Problem that the invention seeks to solve]

Although it is necessary to set the amount of copper to a predetermined amount commensurate with the purpose, increasing the fineness of copper causes the problem that it becomes extremely difficult to knead it into the base material of the building material. In addition, when using an aqueous solution of copper salt, the crystals easily undergo a phase transition due to the temperature and humidity of the harsh environment in which the building materials are used, resulting in sterilization and
It separates from the surface of the building material before it can exert its anti-algae effect.

The present invention has been made based on the fact that the particle size of copper can be easily controlled and the adhesion of copper sprayed onto the object to be thermally sprayed can be stabilized over time by thermal spraying. To provide a building material that can easily attach a required amount of copper to the object to be thermally sprayed, can maintain its adhesion for a long period of time, and can reliably maintain its sterilizing and anti-algae effects even under harsh usage environments. It is in.

[Means for solving problems]

The building material according to the present invention is coated with a paint prepared using aggregate sprayed with copper,
Copper is bonded to building materials by being attached to the paint aggregate.

Thermal spraying may be performed by any of electric wire spraying, gas wire spraying, and powder spraying, and the thickness of the sprayed layer is preferably about 0.1 to 100 μm.

The paint is, for example, a ricin-based paint, the aggregate of which is silica sand, and the binder is acrylic emulsion.

The coating method is performed by a general method such as roller coating or spraying.

Building materials are placed, for example, on exterior walls or around water in kitchens, bathrooms, etc., and are in environments where microorganisms, algae, etc. are likely to grow.

The building material may be of any material as long as it can be coated with paint.

[Effect]

In the present invention, the work of thermally spraying copper onto the aggregate of the paint is carried out in a factory that manufactures building materials. However, it is also possible to use a paint prepared by a paint manufacturer using copper-sprayed aggregate, and the present invention also includes such a case.

Since the spraying time can be freely set, the amount of copper is not uncertain, and the amount of copper attached to the aggregate can be set to a predetermined amount according to the purpose, making it easy to adjust the amount of copper. , can be done accurately.

Paint coating work is done at the above factory.
Alternatively, this coating work can be performed at a construction site without any difference from normal painting work.

Since the adhesion of copper to the aggregate, which is the material to be thermally sprayed, is strong, the sterilizing and algae-preventing effects of copper can be ensured for a long period of time. Further, in this invention, since the paint can be made into any color, it is also possible to color the building material in a desired color.

In addition to the above, the present invention has the following characteristics: The thermal spraying method can be carried out without special processing of the thermal spraying material, copper.
Furthermore, since the spraying operation of the thermal spray gun that sprays copper onto the paint aggregate that is the object to be thermally sprayed does not require a high degree of skill, the work can be carried out easily and at low cost.

〔Example〕

Example: 0.06 g of copper is thermally sprayed onto 1 kg of silica sand (average diameter 800 μm), which is the aggregate for ricin-based paints that are widely used for building exteriors, and a binder made of this silica sand and acrylic emulsion is used to create ricin-based paints. was prepared.

In this way, a ricin-based paint using copper-sprayed aggregate and a ricin-based paint using non-copper-sprayed aggregate were applied to autoclave-cured lightweight aerated concrete panels, which are widely used as building exterior materials. These lightweight aerated concrete panels were placed outdoors with their north faces upright.

Some lightweight cellular concrete panels painted with the latter paint developed green algae after about eight months.

In contrast, no green algae developed on the lightweight aerated concrete panels coated with the former paint.

This confirmed the algae-preventing effect of copper spraying on the aggregate.

〔Effect of the invention〕

Since the present invention utilizes a thermal spraying method, it is possible to accurately and easily attach copper to the aggregate in the required predetermined amount, and this adhesion can be maintained for a long period of time. It can prevent the growth of microorganisms and algae on the wood for a long time.

Claims (1)

[Claims] 1. A construction material coated with a paint prepared using copper sprayed aggregate.