JPH11246790A - Coating for tatami surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating for TATAMI (a mat made of rush) surface which is hardly peeled when rubbing with a wet cloth, etc., after applied to the TATAMI surface. SOLUTION: A one-part coating for TATAMI surface contains a room- temperature crosslinkable aqueous resin and a green pigment. Here, the aqueous resin is an acrylic emulsion which has a carbonyl group and a hydrazide group as crosslinking groups and has a high water resistance and weather resistance and a urethane dispersion having a high wear resistance, adhesion and flexibility. After the coating is applied, the crosslinking groups react in the film-forming process and forms a network structure of a larger polymer to convey a water- insoluble property. The effect of application of the coating is maintained to maintain the inhibitory effect against the change with the lapse of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami mat paint applied to a tatami mat, and more particularly to a tatami mat paint capable of imparting durability against discoloration to a tatami mat to prevent a change with time. The present invention relates to a tatami surface paint capable of restoring the color of a tatami surface to a rush color similar to that of a new product by applying the tatami surface to a tatami surface which has been deteriorated due to the deterioration of the tatami surface.

[0002]

2. Description of the Related Art Tatami mats laid in rooms or the like for a long period of time are:
Discoloration, abrasion, contamination, etc. occur on the tatami mat due to sunburn or stepping on by a person due to sun rays or the like. As a treatment method for protecting the tatami mat, it has been proposed to synthesize a green ink and an ultraviolet ray cut treatment agent, and to color print the synthesized coloring agent on the surface of a new tatami mat woven with rush. 331385).

[0003]

However, in the above-mentioned processing method, since the colorant is merely attached to the tatami surface by printing, it is easily peeled off by wiping with water or the like, thereby protecting the tatami surface for a long time. Could not do.

[0004] During the use of tatami mats, the tatami mats change color,
If abrasion, contamination, etc. occur, remove the discoloration that occurred on the tatami surface and restore it to the color of the new tatami surface (rush grass color)
A coating mainly composed of various resins such as an acrylic resin, a vinyl acetate resin, a butyral resin, and a castor oil has been applied to a tatami mat (see, for example, JP-A-59-126474).

[0005] In this tatami surface coating, similar to the above-mentioned treatment method, only the pigment is brought into close contact (adhesion) with the tatami surface, and no cross-linking (reaction) occurs in the process of forming the coating film, so that the color returns after coating and drying. (Peeling). Therefore, after applying the above paint on the tatami table, for example, when wiping with a rag or the like, the coating film swells or dissolves with moisture, peels off from the tatami table, and adheres to the rag side to produce a color return. However, it is not possible to impart durability to the tatami mat to prevent a change with time.

That is, in the conventional treatment methods and tatami surface paints, it has not been practiced to protect the tatami surface by forming a water-insoluble coating film on the surface of the tatami surface. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tatami surface paint capable of forming a coating film having a property of hardly peeling off when applied to a tatami surface.

[0008]

Means for Solving the Problems In order to achieve the above object, the tatami surface coating composition of the present invention is characterized by comprising a one-part liquid and a cold-crosslinkable aqueous resin. That is, the tatami surface coating material is stable as a liquid, and has a property of reacting and curing when a thin layer (coating film) is formed by being applied.

In order to reproduce the rush color of the tatami mat, a green pigment is preferably contained. The aqueous resin is an acrylic resin (acryl emulsion) having excellent water resistance and weather resistance having a carbonyl group and a hydrazide group as a crosslinking group,
It contains a urethane resin (urethane dispersion) or acryl / urethane composite emulsion having excellent abrasion resistance, adhesion and flexibility.

The cross-linking group may be one containing a carboxylic acid group and an oxadrine group or a carboxylic acid group and an epoxy group.

In the paint using these materials, a cross-linking group reacts in the process of forming a paint film after the application to form a more polymer network structure, and the paint film has a property of being insoluble in water (painting). Layer) is obtained. Further, the durability of the coating film can be further improved by containing an acrylic resin having excellent water resistance and weather resistance and a urethane resin having excellent wear resistance, adhesion and flexibility.

Therefore, by applying the tatami surface paint of the present invention to the tatami surface, the rush surface of the tatami surface is covered with a coating film,
Durability against discoloration and the like in the tatami mat is provided to prevent a temporal change. Also, by containing a green pigment,
The color of the tatami mat can be restored to a rush color similar to that of a new product, and this state can be protected by a coating film.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tatami surface paint is composed of a liquid paint containing an acrylic emulsion and a urethane dispersion as main components, and mixed with a pigment, an additive and an auxiliary. Instead of the acrylic emulsion and the urethane dispersion, an acrylic / urethane composite emulsion may be contained.

The pigment is for imparting a color tone to the tatami mat, and is at least greenish and does not contain heavy metals and has weather resistance. In order to reproduce a natural rush color, it is preferable to mix a white pigment appropriately.
Pigments used include titanium oxide, cyanine blue,
Cyanine green, ocher, carbon and the like.

The tatami surface paint may contain additives such as an antibacterial agent and an ultraviolet absorber. By including an antibacterial agent, it is possible to prevent the occurrence of bacteria on the tatami mat and to maintain a hygienic tatami mat. By including an ultraviolet absorber, discoloration and fading of the tatami mat can be prevented from progressing.

Next, a method of applying the above-mentioned tatami surface paint to the tatami surface will be described. After wiping the tatami table to remove dirt, apply a tatami table paint to the tatami table by brush or roll, or apply it to the tatami table by spray application using a spray nozzle or the like, and dry at room temperature for 20 to 30 minutes. . Since the tatami mat coating contains a room temperature cross-linking group, the dried coating applied to the tatami mat becomes a cross-linked polymer and becomes insoluble in water. (Coating) can be prevented from peeling off, and the prevention of change over time can be maintained.

[0017]

EXAMPLE In Example 1, a tatami surface coating composition was prepared by mixing an acrylic / urethane composite emulsion as a main component and mixing pigments, additives, and auxiliaries in the composition shown in Table 1.

[0018]

[Table 1] Acrylic / urethane composite emulsion (trade name: Boncoat CG5030) 18% White pigment (titanium oxide) 9% Green pigment (trade name: Washinpore stain) 3% Additive 2% Auxiliary 1% Water 67%

The additives include a dispersant, a thickener, a preservative, a fungicide, an antifoamer, an antibacterial agent, an ultraviolet absorber and the like. Auxiliaries include antifreezing agents, coalescing agents and the like.

In Example 2, a tatami mat paint was prepared by mixing an acrylic emulsion and a urethane dispersion as main components, a pigment, an additive, and an auxiliary in a composition as shown in Table 2.

[0021]

Table 2 Acrylic emulsion (trade name: Acronal YJ2715D) 13% Urethane dispersion (Spensol L55) 5% White pigment (titanium oxide) 9% Green pigment (trade name: Washinpore stain) 3% Additive 2% Auxiliary 1% water 67%

The meanings of the additives and auxiliaries are the same as in Example 1.

The tatami surface paint was applied to the tatami surface by roll coating and dried at room temperature for 30 minutes. It was confirmed that the paint was not peeled off by wiping with water and the effect of the paint application was maintained. According to this tatami mat paint, apply to the tatami mat,
It is possible to maintain a coating film (paint layer) that is difficult to peel off with water wiping or the like only by drying at room temperature, so that it can be easily performed even at home.

[0024]

According to the tatami surface coating composition of the present invention, the room temperature crosslinking group in the aqueous resin forms a crosslinked polymer, whereby the coating film applied to the tatami surface and dried becomes insoluble in water. The tatami mat can be protected for a long term because the coating is prevented from being peeled off by the subsequent wiping or the like, and the tatami mat is protected and the effect of applying the paint is maintained and the effect of preventing the aging change is maintained. In addition, by incorporating a pigment suitable for the tatami table, the tatami table can be restored as new, and this state can be maintained for a long time.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04F 15/02 104 E04F 15/02 104A

Claims (4)

[Claims] 1. A tatami surface coating composition comprising a one-component, cold-crosslinkable aqueous resin as a main component. 2. The tatami surface paint according to claim 1, which contains a green pigment. 3. The reaction resin according to claim 1, wherein the aqueous resin contains at least one of a carbonyl group and a hydrazide group, a carboxylic acid group and an oxadrine group, and a carboxylic acid group and an epoxy group. The tatami surface coating composition according to claim 2. 4. The tatami mat coating composition according to claim 1, wherein the aqueous resin contains an acrylic resin and a urethane resin.