JP2003276117A - Stainproof decorative board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decompose a stain substance adhered to a surface by a light. <P>SOLUTION: A stainproof decorative board comprises a base 1, resin- impregnated decorative paper 2, and silicone resin-impregnated surface paper 3 obtained by impregnating surface paper for the decorative board with a silicone binder sequentially laminated, hot press molded and then coated with a photocatalyst coating agent. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board, and more particularly to an antifouling decorative board whose surface is easily decomposed by light. 2. Description of the Related Art Conventionally, there is a decorative plate provided on a horizontal surface such as a table, a counter, and a kitchen, and a vertical surface such as a wall and a booth, and is excellent in various physical properties such as abrasion resistance and impact resistance. Thermosetting resin decorative boards such as diallyl phthalate resin decorative boards and melamine resin decorative boards are widely used. [0003] However, various contaminants adhere to the surface of the decorative plate in daily life and cannot be easily removed if left unattended. In particular, if the decorative surface is embossed, it must be rubbed with a cloth or the like with force. Even if the surface is flat, the surface may not be covered by the ultra-fine surface of a metal plate or plastic film. Since the transfer was performed, the dirt could not be easily and easily removed. [0004] The present invention has been studied in view of such circumstances, and is characterized by the following. That is, a base material, a resin-impregnated decorative paper, and a surface paper for a decorative board are sequentially laminated with a silicone resin-impregnated surface paper impregnated with a silicone-based binder, hot-pressed, and then coated with a photocatalytic coating agent. It is an antifouling decorative board characterized by the following. [0005] As shown in the present invention, a primer layer is formed by incorporating a silicone-based binder into a surface paper for decorative board, and a photocatalytic coating agent is applied after hot pressing to form a decorative surface. A photocatalyst layer can be formed on the substrate. Hereinafter, the present invention will be described in detail. DETAILED DESCRIPTION OF THE INVENTION The base material used in the present invention includes resin-impregnated core paper obtained by impregnating kraft paper for a decorative board, nonwoven fabric, cloth, etc. with a resin from a thermosetting resin, plywood, M
Wood-based base materials such as DF (medium density fiberboard) and particle board can be cited, and are appropriately selected according to use and required quality. As the base material, resin impregnated core paper using kraft paper is preferable from the viewpoint of physical properties such as water resistance, strength and heat resistance. As the resin to be impregnated, phenol resin, unsaturated polyester resin, A resin solution impregnated with a resin liquid composed of a thermosetting resin such as an amino-formaldehyde resin and dried is used, and a phenol resin excellent in strength, heat resistance and the like is particularly preferable. A phenol resin can be obtained by reacting a phenol with an aldehyde at a ratio of 1 to 1.3 mol of the aldehyde to 1 mol of the phenolic hydroxyl group under a basic catalyst. The phenols include phenol, cresol, xylenol, octylphenol, phenylphenol, bisphenol A, bisphenol S, bisphenol F, and the aldehydes include formaldehyde, paraformaldehyde, glyoxal, trioxal, and the like. In addition, if necessary, parasulfonamide, tung oil, DOP, TC
Those modified with a modifier that promotes plasticization such as P (tricresyl phosphate) can also be used. Examples of the basic catalyst include oxidation of alkali metals such as sodium and potassium and alkaline earth metals such as magnesium and calcium. And hydroxides, and amines such as triethylamine and triethanolamine. [0009] The resin impregnated decorative paper has a basis weight of 20 to 200 g.
/ M ² , which is obtained by impregnating resin paper made of thermosetting resin into decorative paper on which various patterns are applied by coloring or printing. Examples of thermosetting resin include diallyl phthalate resin, unsaturated polyester resin, Examples thereof include amino-formaldehyde resins and mixtures thereof. In particular, amino-formaldehyde resins are preferable in terms of surface properties such as heat resistance and water resistance.
Preferably, a formaldehyde resin is used. Examples of the amino-formaldehyde resin include an initial condensate obtained by reacting an amino compound such as melamine, urea, benzoguanamine and acetoguanamine with formaldehyde, and etherification with a lower alcohol such as methyl alcohol and ethyl alcohol. And those modified with a reactive modifier which promotes plasticization, such as paratoluenesulfonamide. The silicone binder used in the present invention strengthens the adhesion to the photocatalyst coating agent described below and fixes the photocatalyst. The silicone binder is not affected by the decomposition function by the photocatalysis. Or a polysiloxane or a silicone-modified resin resistant to a decomposition function. ## STR1 ## (Where n represents an integer of 0, 1, 2, 3;
R ₁ is a C ₁ -C ₄ alkyl group, phenyl group, vinyl group, γ-glycidoxypropyl group, γ-methacryloxypropyl group, γ- (2-aminoethyl) aminopropyl group, γ-chloropropyl group , Γ-mercaptopropyl group, γ-aminopropyl group, 1-acryloxypropyl group and the like. For X, those effective as a binder in the formula are alkoxy groups. As the alkoxysilane in which n is an integer of 0 to 3, for example, when n is 0, tetramethoxysilane, tetraethoxysilane, tetraethoxysilane, Tetrafunctional silanes such as propoxysilane and tetrabutoxysilane are exemplified. When n is 1, trifunctional silanes such as methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, and propyltriethoxysilane are exemplified. When n is 2, bifunctional silanes such as dimethyldimethoxysilane, dimethyldiethoxysilane, diphenyldimethoxysilane, and diphenyldiethoxysilane are exemplified. When n is 3, monofunctional silanes such as trimethylmethoxysilane, trimethylethoxysilane, trimethylisopropoxysilane, and dimethylisobutylmethoxysilane are exemplified. Examples of the polysiloxane include a hydrolyzable silicone compound monomer such as the above-mentioned alkoxysilane, a polymer obtained from a partial hydrolysis product thereof, and colloidal silica. The silicone-modified resin is obtained by introducing silicone into a synthetic resin. Examples of the synthetic resin include synthetic resins such as acrylic resin, epoxy resin, alkyd resin, urethane resin, and polyester resin. Among the synthetic resins into which silicone has been introduced, acrylic silicone resins and epoxy silicone resins are excellent in film formability, film strength, and adhesion to carriers. The silicone resin impregnated surface paper has a basis weight of 16
４０40 g / m ² surface paper for decorative board is impregnated with the aforementioned silicone binder. The photocatalyst coating agent applied to the surface is composed of a photocatalyst, the above-mentioned silicone-based binder, and a photocatalyst active catalyst used as required. The photocatalyst reacts when irradiated with light of a specific wavelength. Is a metal oxide that acts as a catalyst for decomposing organic substances by causing oxidative effects, or has an antibacterial or antifungal effect. For example, titanium oxide (TiO ₂ ), zinc oxide (ZnO), tin oxide (SnO), strontium titanate (SrTiO ₃ ), cerium oxide (CeO), iron oxide (Fe ₂ O ₃ ), and the like. Among these oxides, they are high in sunlight and illumination light used in daily life. Titanium oxide having catalytic activity is particularly desirable. As the titanium oxide, rutile type titanium oxide,
Examples include anatase-type titanium oxide and flukite-type titanium oxide. Anatase-type titanium oxide is more readily available, is inexpensive, has stable properties, is harmless to the human body, and exhibits excellent effects as a photocatalyst. . Further, the photocatalytic activity of metals and metal oxides such as platinum, ruthenium, silver, ruthenium oxide, niobium, copper, tin and nickel oxide is promoted within a range that does not hinder the pattern and color tone of the surface of the thermosetting resin decorative board. An agent may be attached or coated on the surface of titanium oxide. The silicone binder used at the time of impregnation and the silicone binder contained in the photocatalyst coating agent for surface application may have the same composition or different compositions, and may be a primer layer for fixing the photocatalyst to the surface. It is desirable to use a polysiloxane in combination with the silicone binder in the photocatalyst coating agent applied to the surface in order to ensure good hardness and smoothness. In the photocatalyst coating agent, a titanium-based coupling agent, a titanium-based coupling agent,
A silane coupling agent may be included. The method for applying the photocatalyst coating composition is not particularly limited, and includes spray coating, flow coating, and the like.
Known methods such as a coating method, a bar coating method, a roll coating method, a brush coating, and a sponge coating can be used. Light sources for photoexciting the photocatalyst include fluorescent lamps, incandescent lamps, metal halide lamps, mercury lamps and sunlight. Hereinafter, the present invention will be described in more detail based on examples and comparative examples. Example 1 Silicone resin-impregnated surface paper 77 g of acrylic silicone resin emulsion (PCU-103, manufactured by Titanium Industry Co., Ltd.) as a silicone-based binder was converted to a solid content on surface paper having a basis weight of 22 g / m ^2.
/ M ² to obtain a silicone resin-impregnated surface paper. A melamine precondensate having a molar ratio of formaldehyde to melamine of 1.5 to melamine resin impregnated decorative paper was converted to paratoluenesulfonic acid amide 6
Melamine resin liquid was obtained by adding 3 parts of a curing agent (Catanit A, manufactured by Nitto Riken Kogyo KK) and 1 part of a release agent (Separ 328, manufactured by Chukyo Yushi Co., Ltd.). Then,
White non-patterned decorative paper having a basis weight of 100 g / m ² was impregnated with this melamine resin liquid so that the impregnation amount became 100 g / m ^{2 in} terms of solid content, to obtain a melamine resin impregnated decorative paper. Phenol resin-impregnated paper The molar ratio of phenol to formaldehyde is 1: 1.15
After reacting under sodium hydroxide to obtain a resole type phenol resin, the phenol resin impregnated paper was impregnated with 190 g / m ² of kraft paper so that the impregnation amount became 90 g / m ^{2 in} terms of solid content. I got Production of antifouling decorative board Five sheets of phenolic resin impregnated paper, melamine resin impregnated decorative paper and silicone resin impregnated surface paper are laminated, a PET film and a stainless steel plate are arranged, and the temperature is 170 ° C and the pressure is 5
Hot pressing was performed under the conditions of 0 kg / cm ² and time of 100 minutes.
After hot pressing, a titanium oxide-based photocatalytic paint (PC-401, manufactured by Titanium Industry Co., Ltd.) composed of titanium oxide and an acrylic silicone resin emulsion was applied at 1 μm to obtain an antifouling decorative board of Example 1. Comparative Example 1 Instead of impregnating the surface paper with the acrylic silicone resin emulsion in Example 1, the amount of impregnation of the melamine resin liquid used in Example 1 was adjusted to 100 g / m ^{2 in} terms of solid content. A melamine resin-impregnated surface paper impregnated with the above, a resin-impregnated decorative paper similar to that in Example 1, and a phenol resin-impregnated paper were hot-press molded. Next, the acrylic silicone resin emulsion used in Example 1 was applied to the surface of 10 μm,
Furthermore, a titanium oxide photocatalyst paint (Pitanium Co., Ltd.
C-401) was applied at 1 μm to obtain a decorative board of Comparative Example 1. Comparative Example 2 A decorative plate of Comparative Example 2 was obtained in the same manner as in Comparative Example 1, except that the acrylic silicone resin emulsion and the titanium oxide photocatalytic paint were not applied. Table 1 shows the evaluation results. [Table 1] Evaluation Method Adhesion of Photocatalyst / Undercoat Adhesive cellophane tape was adhered to the antifouling decorative board of Example 1 and the decorative board of Comparative Example 1, and the state after peeling was observed. ，, and those with peeling of the photocatalyst layer were marked as ×. Photocatalytic decomposition function The antifouling decorative panel of Example 1 and the decorative panels of Comparative Examples 1 and 2 were replaced with 2
A 0-fold diluted red ink was applied, Lab was measured with a colorimeter, and exposed to 10 W black light 10 cm directly below for 17 hours, and Lab was measured to obtain a color difference ΔE. ΔE was 10 or more, ○, ΔE was 3-10, Δ, and ΔE was less than 3. The antifouling decorative sheet of the present invention has a strong adhesion to the photocatalyst layer since the surface paper for the decorative sheet is impregnated with a silicone binder and serves as a primer layer for the photocatalyst. In addition, the surface retains the functionality of the organic substance decomposing ability of the photocatalyst, so that attached dirt can be easily wiped off.
Therefore, the antifouling decorative board of the present invention can be suitably used as a surface material of members constituting a kitchen, a toilet, and the like.

[Brief description of the drawings] FIG. 1 is a cross-sectional view of an antifouling decorative plate of Example 1. [Explanation of symbols] 1 Substrate 2 Resin impregnated decorative paper 3 Silicone resin impregnated surface paper 5 Photocatalyst layer 9 Antifouling decorative board

Continuation of front page    F term (reference) 2E110 AA37 AA65 AB04 AB23 AB43                       AB46 BA04 BA12 BB04 GA33W                       GB05W GB42Z                 4D075 CA13 CA18 CA34 CA38 DA06                       DB18 DB20 DB22 DB25 DB40                       DB46 DB49 DB52 DC02 DC31                       DC38 EB22 EB33 EB35 EB36                       EB38 EB43 EC02                 4F100 AA21D AK01B AK25D AK33A                       AK52C AK52D AT00A BA04                       BA07 BA10A BA10D CC00D                       DG10A DG10B DG10C EH46                       EJ20 EJ42 EJ82A EJ82B                       EJ82C GB08 HB31B HB31C                       JL06 JL08D JM01D

Claims (1)

Claims: 1. A base material, a resin-impregnated decorative paper, and a silicone paper-impregnated surface paper impregnated with a silicone-based binder on a decorative paper surface paper are laminated in order, and after hot-press molding, a photocatalyst is formed. An antifouling decorative plate characterized by being coated with a coating agent.