JP2000213071A - Mildewproof building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of mildew by heating a building plate, and impregnating and infiltrating a synthetic resin emulsion type paint film waterproof material mixed with a mildewproof agent into the building plate to cover the whole face. SOLUTION: A building plate such as a roof substrate material, inner wall material or a floor material is put in a continuous drier with a metal conveyor and is heated to 70-100 deg.C. The end section of the heated building plate is coated or immersed with a synthetic resin emulsion waterproof paint such as an acrylic resin emulsion or a vinyl acetate resin emulsion, then the surface and back face of the building plate are coated with a waterproof paint. A surface active agent, an emulsifier, a thickener and an antifreezing agent of various kinds are added as dispersants to improve the nature of the waterproof material made of the synthetic resin emulsion as required. Mildew and formaldehyde can be completely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifungal building material used for a roof base material, an inner wall material, a floor material and the like of a building.

[0002]

2. Description of the Related Art Plywood, fiber board, particle board, gypsum board, rock wool board, wood wool cement board, silica board, etc. are used as building board materials used for roof base materials, interior wall materials, floor materials, etc. of conventional buildings. there were.

[0003] Such a building board is porous, and when used in a highly heat-insulated and airtight building, mold is generated inside and on the surface of the building board. In particular, plywood, fiber board, particle board and the like generate formaldehyde, which is a social problem.

[0004] Even if the front surface is painted with an antifungal paint, many molds are generated inside and on the back surface of the building board material that cannot be painted, which has become a serious health problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to completely prevent mold and formaldehyde generated on the surface and inside of a building board.

[0006]

Means for Solving the Problems Architectural board materials using a synthetic resin emulsion type coating waterproofing material mixed with a fungicide by heating a building board material used for a roof base material, an inner wall material, a floor material, etc. of a building. Impregnated and penetrated into the inside of the substrate and cover the entire surface.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Plywood, roofing material, interior wall material, flooring material, ceiling, wall material, partition wall material, etc.
Fiber board, particle board, gypsum board,
Rock wool boards, wood wool cement boards, silical boards, fiber reinforced boards and the like are used.

[0008] When these building boards are used in various parts of a building, the following molds are mainly generated depending on the place of use and conditions of use. Gradosporium, a mold that frequently occurs,
Penicillium, Ulocladium, Alternaria, Acremonium, Aspergillus, Trichoderma and Houma.

[0009] Of the building board materials, plywood and particle board are used in large quantities as building interior finishing materials, but they have a major drawback in that they generate formaldehyde.

[0010] In order to prevent the occurrence of mold as described above, an antifungal paint containing a fungicide in various paints is generally used, and the antifungal paint is applied to a building board. However, painting is often done after building construction, only on the surface of the building boards. Further, the building plate material may be painted or soaked in the state, but it cannot penetrate into the interior of the building plate material and cannot prevent mold generated from the inside.

When the building board is heated to 70 to 100 ° C. to expand the air inside the building board and apply or immerse a synthetic resin emulsion-type coating film waterproofing material containing antifungal, the inside of the building board is easily impregnated. Can be infiltrated. In particular, permeation from the end is greatly improved as compared with the case without heating.

As a method for heating the building board, a commonly used electric or hot air dryer is used. Put the building board in a continuous dryer on a metal conveyor and put it at 70-100 ° C.
First, the end of the heated building board material is applied or dipped with a synthetic resin emulsion waterproof coating material containing fungicide, and then the front and back surfaces of the building board material are applied.

The synthetic resin emulsion of the synthetic resin emulsion type coating film waterproofing material used in the present invention includes acrylic resin emulsion, vinyl acetate emulsion, vinyl chloride resin emulsion, vinylidene chloride resin emulsion, styrene / butadiene resin emulsion. , Epoxy resin emulsion and acrylic acid ester,
Examples thereof include copolymers of styrene, ethylene, vinyl ester, vinyl acetate, synthetic rubber, and the like.

For example, these copolymers include acryl / vinyl acetate copolymer, vinylidene chloride / butyl acrylate copolymer, ethylene / vinyl acetate copolymer and the like.

In order to improve the properties of the waterproofing material comprising a synthetic resin emulsion, if necessary, various surfactants as a dispersant, an emulsifier for stabilizing the emulsion, an anti-wrinkling agent for the emulsion, a thickener, a sag. Inhibitor,
An anti-settling agent, an anti-freezing agent and the like may be added. Plasticizer that gives flexibility for the purpose of further improving performance, heat,
A stabilizer for preventing deterioration due to light may be added.

The antifungal agent to be added to the synthetic resin emulsion type coating film waterproof material does not deteriorate or deteriorate when mixed into the coating material, has a certain durability after application and has a resistance to all molds generated. It must have Examples of the fungicide include organotin compounds, organophosphorus compounds, antibacterial zeolites, benzimidazole compounds, tetrachloroisophthalonitrile compounds, and the like, for example, commercially available tetrachloroisophthalonitrile, thiabentazole and the like. Can be used.

[0017]

Embodiments of the present invention will be described below.

Example A non-combustible emulsion-type acrylic coating film waterproofing material equivalent to a base material (trade name "Roll Mighty" Co., Ltd.)
5 parts by weight of a fungicide, tetrachloroisophthalonitrile, was added and mixed with 100 parts by weight of Ribor. 200 × 200 mm, thickness 12 heated to 80 ° C.
The ends of the particle board and the plywood having a thickness of 2 mm were immersed, and then the front and back surfaces were coated with the waterproof coating material.

Comparative Example 1 Unheated particle board and plywood were immersed in a waterproof coating material for 1 minute.

Comparative Example 2 Particle board and plywood were not covered with anything.

Table 1 shows the results of the antifungal effect.

[0022]

[Table 1]

In order to confirm the fungicidal effect, a sample was placed in a closed Styrofoam box, and gladosporium, Aspergillus niger, Alternaria, Penicillium funiculosum, urocldium, fusarium, Norizops oryzae, Gliocladium virens, ketomium. A mixed spore suspension of a test bacterium such as globosum was periodically sprinkled and maintained at a humidity of 85 to 95% and a temperature of 10 to 30 ° C., and observed for 2 months.

[0024]

According to the present invention, in order to completely prevent the mold from building boards, it is necessary that not only the front and back surfaces of the building boards but also the inside of the building boards be sufficiently impregnated with the fungicide. The effect was confirmed by heating and applying and dipping a synthetic resin emulsion type waterproof material containing a fungicide. Furthermore, formaldehyde generated from plywood and particle board was completely prevented.

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Claims (1)

[Claims] 1. A fungicidal building material characterized by heating a building board material and coating or dipping it with a synthetic resin emulsion-type coating waterproofing material mixed with a fungicide to coat the building board material.