JP2003276145A - Stainproof coated decorative material and method for manufacturing thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decompose a contaminant attaching to the surface of a decorative material by light. <P>SOLUTION: This decorative material is constituted of a decorative paper 2 bonded to a base material 1 and a urethane coated layer 5, a aqueous undercoat layer 6 and a photocatalytic layer 7 sequentially formed on the decorative surface. When the aqueous undercoat layer 6 is formed, the urethane coated layer 5 has no dry tack and is formed before its complete curing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling coating cosmetic material having a photocatalytic function and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a cosmetic material having a photocatalytic function is used.
It is known to use a capsule type that does not directly contact titanium oxide having a photocatalytic function with an organic binder. In addition, a photocatalyst-carrying film in which a photocatalyst layer is provided on a film of PET, carbonate, acrylic or the like, which is coated with an undercoat for preventing film decomposition, is known.

[0003]

However, the former cosmetic material does not have all the photocatalytic functions such as degradability and hydrophilicity, while the latter photocatalyst-supporting film has all the catalytic functions, Since the film of the supporting base material is transparent in order to maintain photodegradability, it only functions as a protective sheet, and it is unsuitable for residential use because the surface has no design and the colors and patterns cannot be coordinated. Moreover, although there is a method of applying urethane coating as a method of sufficiently bringing out the designability of the decorative base material, a method of imparting all photocatalytic functions on this coating layer has not been found.

As a method for solving such a problem, a method of forming an undercoat layer on a urethane coating and then forming a photocatalyst layer is generally tried. Was easily applied, but the photocatalytic function was not sufficiently exhibited.

[0005]

The present invention has been studied in view of the above situation, and is characterized by the following. That is, the decorative paper is adhered to the base material, and the decorative surface is
A urethane coating layer, a water-based undercoat layer, and a photocatalyst layer are formed in that order, and an antifouling coating material is applied to the base material. A method for producing an antifouling coating decorative material characterized by forming an undercoat layer and a photocatalyst layer, and when forming the water-based undercoat layer, the urethane coating layer has no finger tack and is completely 3. The method for producing an antifouling coating decorative material according to claim 2, wherein it is formed before being cured, and the glossiness of the organic solvent is free from the finger-tacking and completely curing. The method for producing an antifouling coating cosmetic material according to claim 3, wherein the water-based undercoat layer is formed according to the change in the index, and the degree of change in the glossiness is an index represented by the formula 1. Claims characterized by 4 antifouling method for producing a coated decorative material according,

[Formula 1] The method for producing an antifouling coating decorative material according to claim 5, wherein the water-based undercoat layer is formed when the index is 0.9 or less. Hereinafter, the present invention will be described in detail.

The antifouling coating decorative material of the present invention is used as a base material such as plywood, wood, wood-based substrate such as MDF, thermosetting resin laminated board, etc. 80-1
40 g / m ² decorative paper or thin paper with a basis weight of 20 to 40 g / m ² used for printed plywood is adhered, and then a sanding sealer is applied in sequence, followed by painting An undercoat layer is provided and a photocatalyst layer is further formed.

As the thermosetting resin laminate, for example, melamine resin-impregnated paper and melamine resin-impregnated paper obtained by thermocompression molding of melamine resin-impregnated paper and phenol resin-impregnated paper by a conventionally known method are thermocompression-molded by the same method. Examples include melamine resin laminates, phenolic resin-impregnated papers thermoformed by the same method, and phenol resin laminates. Sanding treatment is applied to both the front and back surfaces in consideration of adhesion to decorative paper, wall and other substrates.

The polyurethane used for urethane coating is not particularly limited as long as it is a liquid type which is a type in which a commercially available polyol is cured with an isocyanate curing agent.

The undercoat layer is a binder for fixing the photocatalyst, and as the binder, a silicon-modified resin containing at least 2 to 60% by weight of silicon in terms of silicon dioxide, and colloidal silica in terms of silicon dioxide. Resin containing 5% to 40% by weight,
Resin containing 3 wt% to 60 wt% of polysiloxane in terms of silicon dioxide, or alkali metal silica compound or amorphous titanium peroxide sol, amorphous titanium oxide sol or amorphous titanium hydroxide containing the alkali metal silica compound , An amorphous titanium peroxide having no photocatalytic ability and / or an amorphous titanium oxide mixed with an aqueous dispersion emulsion.

When a non-aqueous solvent type silicone resin is used for the undercoat layer, it has good compatibility with the underlying urethane coating layer and the adhesiveness is not bad in general, but as shown in Comparative Examples 2, 3 and 4 of Table 1. Photocatalytic degradability is inferior, which is not preferable.

When the undercoat layer is formed, it is important to apply it before the urethane coating layer as the base has no finger touch tack and is completely cured. If it is applied with the finger touch tack, urethane is applied. The photocatalyst is liable to be insufficiently fixed due to mixing with the paint, and when the photocatalyst is completely cured and then applied, it is repelled and the undercoat layer is not formed. This proper state can be judged by utilizing the property that the coating film is corroded by the organic solvent after the urethane coating is applied and before it is completely cured. The glossiness of the urethane coating layer after coating, It can be judged by comparing with the glossiness after the coating film is treated with an organic solvent which easily corrodes dioxane, dimethylformamide, dimethylsulfone oxide, and the index of the formula 1 is preferably 0.9 or less. If this value exceeds 0.9, the wettability of the coating film deteriorates, and as a result, the adhesion becomes poor and the photocatalyst cannot be fixed, and the photocatalytic decomposability tends to become poor.

[0012]

[Formula 1]

The photocatalyst used to form the photocatalyst layer
As the coating agent, the photocatalyst was mixed with the above-mentioned binder.
Photocatalysts become photocatalytic when they are irradiated with light of a specific wavelength.
As a catalyst that decomposes organic substances by causing biological reactions
Gold that acts and has an antibacterial or antifungal effect
Refers to group oxides such as titanium oxide (Ti
O ₂), Zinc oxide (ZnO), tin oxide (SnO), titanium
Strontium acid salt (SrTiO 3₃), Cerium oxide
(CeO), iron oxide (Fe₂O₃), Etc., and these
Of the oxides of the sun, illumination light used in daily life and daily life
And titanium oxide with high catalytic activity is particularly desirable.
Yes.

As titanium oxide, rutile type titanium oxide,
Examples of anatase type titanium oxide, fluccite type titanium oxide and the like are preferable, and the anatase type titanium oxide is easier to obtain, cheaper and stable in characteristics, harmless to the human body, and excellent in a photocatalyst effect, which is preferable. .

The present invention will be described in detail below based on Examples and Comparative Examples.

Using plywood thickness 2.5mm as EXAMPLE 1 substrate, bonding the decorative paper of whitish of 80 g / m ² of vinyl acetate-based adhesive 38 g / m ² coated with. Next, after applying a two-component curing type urethane resin (trade name U-coat sanding manufactured by Hamani Paint Co., Ltd.) as a sanding sealer, a two-component curing type urethane resin (trade name urethane manufactured by Sanyu Paint Co., Ltd.) is applied using a flow coater. Flat) coating amount is 100
Apply the coating to g / m ² and dry to form a urethane coating layer. After the tack on the finger is removed, measure the gloss value of a 60 ° incident angle gloss meter and measure the urethane coating layer. Was treated with dioxane for 5 minutes, the gloss value was measured, and when the index shown in Formula 2 was 0.5, 10 μm of acrylic silicone resin emulsion (PCU-103 manufactured by Titanium Industry Co., Ltd.) was applied as an undercoat agent. did. Next, titanium oxide photocatalyst paint (PC-4 manufactured by Titanium Industry Co., Ltd.)
01) 1 μ was applied to obtain the antifouling coating decorative material of Example 1.

[Formula 2]

Example 2 The same procedure as in Example 1 was carried out except that the curing of the two-component curing type urethane resin was advanced and the undercoat layer was formed when the index of the formula 2 was 0.9. The antifouling coating decorative material 2 was obtained.

Comparative Example 1 Comparative Example 1 was carried out in the same manner as in Example 1 except that the two-component curing type urethane resin was cured and the undercoat layer was formed when the index of the formula 2 was 1.0. A cosmetic material of No. 1 was obtained.

Comparative Example 2 A decorative material of Comparative Example 2 was obtained in the same manner as in Example 1 except that a solvent type silicone resin primer was used as the undercoat layer.

Comparative Example 3 A decorative material of Comparative Example 3 was obtained in the same manner as in Example 2, except that a solvent type silicone resin-based primer was used as the undercoat layer.

Comparative Example 4 A decorative material of Comparative Example 4 was obtained in the same manner as in Comparative Example 1, except that a solvent type silicone resin-based primer was used as the undercoat layer.

The evaluation results are shown in Table 1.

[Table 1]

The evaluation method was as follows. Repelling when forming the undercoat layer By visually observing the state when the undercoating agent is applied, there is no cissing ○, there is cissing but it is not visible in the appearance △, even after applying the photocatalytic coating agent It is said that there are defects. Photocatalyst / Undercoat Adhesion The cellophane tape was adhered to the antifouling coating decorative materials of Examples 1 and 2 and the coating decorative materials of Comparative Examples 1 to 4, and the state after peeling was observed. When there was less than 10% of the peeled portion, Δ was given, and when there was more than 10% of the peeled portion, x was given. Photocatalytic decomposition function A 20-fold diluted red ink was applied to the antifouling coating decorative materials of Examples 1 and 2 and the coating decorative materials of Comparative Examples 1 to 4, and Lab was measured with a colorimeter to obtain 10W black light. The sample was exposed to 10 cm immediately below for 2 hours, and the Lab was measured to determine the color difference ΔE. ΔE
Is 15 or greater, ΔE is 3 to 15, and ΔE is less than 3.

[0023]

EFFECT OF THE INVENTION In the present invention, as a determination of the curing state of a urethane coating, an organic solvent is used and the ratio of glossiness is used as an index shown in Formula 1. When this index is 0.9 or less, the undercoat layer is water-based. By applying the above, it is possible to obtain an antifouling coating decorative material with good appearance, adhesion, and photocatalytic decomposition.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of an antifouling coating decorative material of Example 1.

[Explanation of symbols]

1 base material 2 Decorative paper 5 Urethane coating layer 6 Water-based undercoat layer 7 Photocatalyst layer 10 Antifouling paint cosmetics

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09D 5/00 C09D 5/00 Z 175/04 175/04 E04F 13/08 E04F 13/08 A F term ( reference) 2E110 AA37 AA65 AB22 BA05 BB04 EA09 GA06W GB53Z 4D075 AE06 BB25Y BB91Y CA13 CA34 DA06 DB18 DB22 DB25 DB46 DB63 DC01 DC31 EA06 EA13 EB38 EB43 EC02 4F100 AA17E AA21 AK22G AK25 AK51C AK52 AP02 AT00A BA05 BA07 BA10A BA10E CC00C CC00D DG10B EH46 EH462 EJ08 EJ082 EJ65D HB00B JK06 JL06 JL08E JL11 JM02 JN21 YY00 4J038 DG051 DG231 DL031 HA146 HA216 MA08 MA10 NA05 PA07

Claims (6)

[Claims] 1. A decorative paper is adhered to a base material, and the decorative surface is
An antifouling paint decorative material comprising a urethane coating layer, a water-based undercoat layer, and a photocatalyst layer sequentially formed. 2. A method for producing an antifouling coating cosmetic material, which comprises adhering a decorative paper to a base material and sequentially forming a urethane coating layer, an aqueous undercoat layer and a photocatalyst layer on the decorative surface. 3. The protective coating according to claim 2, wherein when the water-based undercoat layer is formed, the urethane coating layer has no finger tack and is formed before it is completely cured. Method for manufacturing stain-resistant coating material. 4. The water-based undercoat layer is formed by judging the change in glossiness due to an organic solvent until there is no tackiness on the finger and complete curing. A method for producing the antifouling coating material as described. 5. The method for producing an antifouling coating decorative material according to claim 4, wherein the degree of the change in the glossiness is set as an index represented by Formula 1. [Formula 1] 6. The method for producing an antifouling coating material according to claim 5, wherein the water-based undercoat layer is formed when the index is 0.9 or less.