JP3045212U - Floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flooring material having a durable, non-slip, good gloss and glossy coating, a "burn" prevention effect and a safe antibacterial property. I do. A floor material having a pencil hardness of 2H or more and 4H or less and having a coating comprising a urethane emulsion resin, an organic ultraviolet absorbent and an antibacterial agent.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to flooring materials such as flooring, P tiles, and cushion tiles.

[0002]

[Prior art]

 In recent years, flooring materials such as flooring, P tiles (plastic flooring materials), and cushion floors have been widely used in homes instead of conventional tatami mats and carpets. However, unlike in Europe and the United States, Japanese households walk on the floor with slippers or socks instead of shoes, making them extremely slippery, and the danger is particularly pronounced in homes with elderly people.

[0003] Of these, flooring is particularly often used in dining kitchens and the like. In this case, chairs and the like are easily damaged, and floor materials in children's rooms and the like are easily damaged by playing with blocks and the like. . These areas are particularly dirty places in general households, and their aesthetic appearance was significantly impaired, and they could become a hotbed of mold and bacteria.

In addition, cushion floors and P tiles are often used in hospitals, cafeterias, and the like. However, these places need to prevent in-hospital infection and suppress the generation of bacteria such as Escherichia coli O-157. In the case of hospitals, many people have difficulty walking, and their flooring is absolutely required to be non-slip.

On the other hand, with the declining birth rate, the number of households that keep pets such as dogs and cats in their homes is increasing. As a result, the floor is dirty and mold and bacteria are easily generated, but it has been pointed out that these are closely related to atopic dermatitis and bronchial asthma. In addition, conventional floor coatings caused so-called "burns" due to ultraviolet rays such as sunlight, and even in newly constructed houses, significant discoloration and fading occurred in less than one year in places where the sun hit.

[0006] In order to solve these drawbacks, some flooring materials have been proposed, but at present there is no solution to all of the above problems. That is, there are problems such as low resistance, easy damage, and use of a substance that is harmless to the human body but causes harm to pets, or lacks sustained antibacterial action.

[0007]

[Problems to be solved by the invention]

 The present invention solves the above-mentioned problems of the prior art, that is, it has a durable, non-slip, and a film having a good gloss and gloss, and has an effect of preventing discoloration, that is, a so-called "burn", and a safety. It is an object to provide a floor material having excellent antibacterial properties.

[0008]

[Means for Solving the Problems]

 As described in claim 1, the flooring material of the present invention is a flooring material having a pencil hardness of 2H or more and 4H or less and having a coating containing a urethane emulsion resin, an organic ultraviolet absorber and an antibacterial agent.

[0009]

[Embodiment of the invention]

 The flooring of the present invention comprises a flooring substrate 2 and a coating 1 as shown in FIG. The flooring material 2 may be any material that is normally used as a flooring material, such as flooring, P tile, cushion tile, and the like. On the other hand, the coating 1 can be obtained by preparing a floor coating, applying and drying. Hereinafter, a method for producing a floor material of the present invention by applying a floor paint to a floor material base material will be described.

In the present invention, it is necessary to have a urethane emulsion resin in the coating. In other words, the urethane-based emulsion imparts the coating with slip resistance and water resistance, and firmly holds the organic ultraviolet absorber and the antibacterial agent.

Examples of the urethane-based emulsion resin include NEORETZ R-960 and R-969 manufactured by Zeneca, and VTW1265 and 1801 manufactured by Hoechst. A highly durable film can be formed.

It is necessary to select the urethane emulsion resin in such a proportion and type that the hardness of the floor paint after drying is 2H or more and 4H or less in pencil hardness. That is, if the hardness of the paint is low, the coating is easily lost, and if the hardness is high, the coating is easily peeled. Here, in particular, when the pencil hardness is 3H or more and 4H or less, the life of the coating film can be made extremely long.

In the present invention, the pencil hardness is a value measured as follows. That is, using a new pencil H-6H of a pencil made by Mitsubishi Pencil "UNI", exposing the core of one end of the pencil without sharpening the core, holding the other end, and setting the core of the exposed portion to the floor. After applying the paint for application, slowly move it with the weight of its own weight only while maintaining the contact angle at about 30 degrees on the dried application surface, and visually observe the paint surface for any scratches at that time. . At this time, the pencil hardness in the present invention was defined as the hardness of the hardest pencil that did not cause scratches.

In the present invention, it is preferable to mix an organic solvent in the floor coating used for forming the coating. That is, the organic solvent, together with water, controls the drying time of the floor coating after application. In other words, if the drying time is short, the thickness unevenness (spraying unevenness in the case of spray painting, brush stitching in the case of brush application) caused by coating remains as it is, and the gloss required for flooring And aesthetics may be significantly impaired.

On the other hand, if the drying time is long, not only the coating property, productivity, and workability are lowered, but also dust and the like in the air are easily deposited, and a flooring base material having an absorbing property such as flooring is used. When applied to flooring materials, the amount of permeation into the base material for flooring increases, which requires more paint than necessary and may cause unexpected obstacles. Therefore, the drying time of the floor paint is 10 to 20 minutes at 5 ° C. and 50% relative humidity when brushing is applied, and there is no wet feeling as judged by touch, and 2 hours. It is preferable to adjust so as to be substantially constant below.

Another function of the organic solvent blended in the floor coating is to contribute to the stability of the coating. In other words, it functions to prevent separation and sedimentation of components during long-term storage and to stabilize quality.

Here, the organic solvent to be blended in the floor coating includes a boiling point, compatibility with water and azeotropic properties, an influence on its viscosity when added to a system, an influence on a urethane emulsion resin, and the like. Considering this, it is desirable to use ethyl cellosolve. When ethyl cellosolve is used, a beautiful coating without any unevenness can be obtained even when recoating is performed.

In the present invention, it is necessary that the ultraviolet absorber be organic. In general, inorganic absorbers used as ultraviolet absorbers, especially titanium oxide, have the property of decomposing nearby organic substances. This property is not only anatase type titanium oxide with high photoactivity but also relatively low photoactivity. Even if the rutile-type crystal structure of titanium oxide is used for more than one year, its effect on the resin component and antibacterial agent as the binder of the coating cannot be ignored. That is, when an inorganic material such as titanium oxide is used as the ultraviolet absorber, the antibacterial property is easily lost, and the urethane resin deteriorates and becomes slippery in about one year, and further peeling and cracking occur. Or may be powdered. When an organic ultraviolet absorber is used, no photoactivity with respect to the urethane resin is generated, so that the properties are maintained for a long time without deterioration of the coating film.

Examples of the organic ultraviolet absorber include benzotriazole-based compounds, benzophenone-based compounds, salicylic acid-based compounds, and the like. Is desirable. Examples of such benzotriazole-based compounds include 2- (5-methyl-2-hydroxyphenyl) benzotriazole and 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H- Benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) benzotriazole, 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotria Sol, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-t-amyl-2-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole and the like.

In particular, the benzotriazole compound shown in Chemical formula 1 is preferable because it maintains high ultraviolet absorption for a long time. It is available from Ciba-Geigy as Tinuvin 384.

[0021]

Embedded image

The substance shown in Chemical formula 1 has a slight visible light absorbing property and is light yellow. Therefore, when the substance is applied to a flooring material having a dark color, even if the amount of addition is large, Although good, it is preferable to adjust the amount of addition as a general-purpose floor paint. It should be noted that if the compounding amount is too large, the durability may decrease.

It is necessary that the blending amount of these ultraviolet absorbers exhibits its effect and is maintained for about one year. The addition of an auxiliary agent for improving the stability of the above-mentioned organic ultraviolet absorber to the floor paint used in the production of the flooring material of the present invention may be performed as long as other physical properties and the effect of the present invention are not hindered. .

In the present invention, it is preferable that the antibacterial agent is also an organic antibacterial agent. That is, when a silver-based antibacterial agent used in recent years is used alone, the antibacterial agent is less effective because it does not easily appear on the surface at the time of application, and it is expensive, so that the use of a large amount increases the cost. The transparency required for floor coatings tends to be lost, and the urethane resin is likely to deteriorate due to the catalytic properties of silver.

There is also an antibacterial agent using a heavy metal such as copper, but it is not safe because there is a concern that it may affect the human body and the like.

Here, an organic antibacterial agent, particularly an antibacterial agent derived from natural products for safety and health is desired. Although hinokitiol and chitosan are known as antibacterial agents derived from natural products, grapefruit seed extract-derived antibacterial agents are considered in terms of their compatibility with the urethane emulsion resin, applicability required for floor coatings, and long-term stability. Antibacterial agents are particularly desirable. This product is known for its extremely high antibacterial activity and safety for humans and animals, and can be obtained from Japan Water Treatment Technology Research Institute.

[0027] When an antibacterial agent derived from the grapefruit seed extract is used in combination with a small amount of a silver-based antibacterial agent, a remarkable synergistic effect can be obtained. If the antibacterial agent used at this time is a zeolite surface with silver impregnated, it is easy to handle and relatively easy to mix. Such silver-impregnated zeolites are available from Shinagawa Fuel and others.

Further, as other silver-based antibacterial agents, those known as Ceragrace are available from Nippon Water Treatment Giken or the like. Although this product has an antibacterial effect by the action of active oxygen, a truly revolutionary antibacterial effect can be obtained by combining this product with the above-mentioned organic antibacterial agent derived from the grapefruit seed extract.

When the amount of these antibacterial agents is increased, the film becomes weaker and the durability is reduced. On the other hand, if the amount is small, the antibacterial effect is low.

The urethane emulsion resin, the organic solvent, the organic ultraviolet absorber and the antibacterial agent are mixed by means of a screw mixer or the like to obtain a floor coating that can be used for preparing the flooring material of the present invention. . As a compounding ratio, for example, NEOREZ R-960 manufactured by Zeneca is 18 parts by weight or more and 23 parts by weight or less, the benzotriazole compound represented by the formula 1 is 1 part by weight or more and 3 parts by weight or less, and Ciba Geigy Co., Ltd. tinuvin 123 is used as a stabilizer. 0.1 to 2 parts by weight; 0.5 to 8 parts by weight of ethyl cellosolve as a solvent; 50 to 100 parts by weight of water; an antibacterial agent derived from grapefruit seed extract (Nippon Water Treatment Engineering Co., Ltd.) If WJ-013) is more than 0.1 part by weight and less than 10 parts by weight and the silver-based antibacterial agent is more than 0.1 part by weight and less than 1 part by weight, a particularly excellent effect can be obtained.

The floor coating material prepared as described above can be applied to a floor material base material by means of a brush, a roller or the like, or sprayed or the like, and dried to obtain the floor material of the present invention. At this time, it is necessary that the coating amount is 30 to 70 μm after drying. That is, when the thickness is less than 30 μm, the durability is poor, and when the thickness is 70 μm or more, the time required for drying becomes long, and at the same time, unevenness in thickness occurs, which impairs the aesthetic appearance required for flooring. Here, even if the thickness is less than 30 μm, an extremely good coating can be obtained by performing recoating. In addition, although coating irregularities are likely to occur when the coating is performed repeatedly, in the case of the floor coating, the occurrence of such irregularities can be suppressed by the action of the organic solvent.

After the application, drying is performed. Usually, the touch feeling test with a finger after 10 to 20 minutes shows almost no wet feeling, and after 2 hours, almost constant weight is reached. The flooring material is a flooring material which is durable, non-slip, has good gloss and gloss, has a high effect of preventing "burn", and has safe antibacterial properties.

[0033]

【Example】

 Next, examples and comparative examples of the present invention will be described. The chemicals shown in Table 1 were mixed with a screw mixer so as to have the compounding ratio shown in Table 2 to obtain a floor coating. These were applied to a base material for a flooring (flooring) of a dining room with a brush so as to have a thickness of 50 μm. After 2 hours from the application, the progress was observed in January, half a year, and 1 year. The drying time after application was judged by the tactile sensation with a finger, and the pencil hardness 2 hours after application was also measured. The results are shown in Table 2.

In Table 2, gloss / transparency, scratch / peeling prevention and discoloration prevention were judged by visual observation, and slip prevention was judged by wearing a new sock by a sensory test. ×: 2 hours after application, judged to be insufficient; x: six months after observation: insufficient; ○: one year after observation: insufficient. When it was judged that the effect was sufficiently maintained even at the time of the observation after one year, it was evaluated as ◎. The places where the above floor materials are installed are the places where the sunlight through the transparent glass shines for almost the same time.

The antibacterial properties of these samples were evaluated as follows. The above floor material was collected as a sample, and the floor material was allowed to stand on a sterile petri dish in which 1 ml of water containing Aspergillus niger at a concentration of 10 ⁶ / ml was dropped so that the coating was placed below the floor material. C., and the number of viable bacteria after 24 hours was examined.

When the number of viable cells after 24 hours became 10 ² / ml or less, ◎ indicates that the number of viable bacteria became 10 ³ / ml or less, ○ indicates that the number of viable bacteria became 10 ⁴ / ml or less, and Δ indicates the change. Those in which no was observed or increased were evaluated as x.

[0037]

[Table 1]

[0038]

[Table 2]

From Table 2, the effect of the flooring material of the present invention is clear. As in the case of Experimental Example 2 above, a case where an acrylic emulsion resin was used in place of the urethane emulsion resin and applied to the base material for flooring was also studied, but it was very slippery and the floor was extremely slippery. It could not be used as a material.

A floor coating composition was prepared in the same manner as in Experimental Example 2 except that titanium oxide fine powder was used as an ultraviolet absorber. It was prone to non-uniformity and required constant stirring during use. When this paint was similarly applied to a flooring material, gloss and transparency were lost in about February, and almost no anti-slip effect was observed.

In the same manner as in Experimental Example 2, a urethane emulsion resin was examined in the same manner using NEORETZ R-969 manufactured by Zeneca, VTW1265 manufactured by Hoechst, and WTW1801 manufactured by Hoechst. As a result, it was almost the same as the case where Zeneca-made Neorez R-960 was used, but the life of each coating was about 10 months.

On the other hand, the floor paint used in Experimental Example 2 was applied and dried on a P tile base material for a kitchen floor and a cushion floor base material for a bathroom undressing room to obtain floor materials, respectively. They were actually used at home, but none of them were peeled off after one year, and both gloss and transparency were good.

[0043]

[Effect of the invention]

 The flooring material of the present invention is a durable, non-slip, safe glossy and glossy coating, and has a discoloration-preventing effect of so-called "burn" and an antibacterial property. Material.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross section of a flooring according to the present invention.

[Explanation of symbols]

 1 coating 2 base material for flooring

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C09D 175/04 PHW C09D 175/04 PHW E04F 15/10 104 0231-2E E04F 15/10 104A

Claims (4)

[Utility model registration claims] 1. A flooring material characterized by having a pencil hardness of 2H or more and 4H or less and having a coating comprising a urethane emulsion resin, an organic ultraviolet absorber and an antibacterial agent. 2. The flooring according to claim 1, wherein the coating further comprises a stabilizer for an organic ultraviolet absorber. 3. The flooring according to claim 1, wherein the antibacterial agent is an antibacterial agent derived from grapefruit seed extract. 4. The flooring material according to claim 1, wherein the antibacterial agent is a mixture of an antibacterial agent derived from grapefruit seed extract and a silver-based antibacterial agent.