JP3145632B2 - Anti-MRSA artificial marble and composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an MRSA (Methicillin Resistant Staphylococcus aureus).
phylococcus Aureus) and a composition used for producing artificial marble having antibacterial properties.

[0002]

2. Description of the Related Art Artificial marble has excellent properties such as texture, workability, workability, weather resistance, and strength.
For example, it is widely used in many applications such as countertops, kitchen tops, furniture, sanitary applications, interior materials, and small stationary items. In addition, artificial marble has recently been used in hospitals, nursing homes, and the like because of the cleanliness that it gives. This artificial marble generally comprises a resin, an inorganic filler, a catalyst, a crosslinking agent, and a pigment, and has a unique elegant appearance, easy processability, and excellent strength.

[0003]

In recent years, with the diversification of Japanese lifestyles, people who are conscious of cleanliness have spread among young people, especially among young people. In addition, nosocomial infections and secondary infections in hospitals and the like have become problems. Under such circumstances, development of a clean material or a material that does not propagate bacteria is desired. On the other hand, since artificial marble is non-porous, it has been popular as a clean material because bacteria are less likely to propagate than other porous building materials and the like and easy to clean. In addition, in the field of general resin materials, there are several conventional techniques aimed at imparting antibacterial, antifungal and deodorant functions to resin materials (JP-A-5-295127,
JP-A-5-140331, JP-A-5-25319,
JP-A-2-124949 and JP-A-4-93360. However, among the antibacterial functions, MRS, which is particularly problematic,
Focusing on A, there was almost no technique for examining what configuration should be adopted to impart anti-MRSA property to the resin material.

[0004] The present invention has been made in view of the above prior art, and has as its object to provide an artificial marble composition for producing artificial marble having anti-MRSA properties.

[0005]

SUMMARY OF THE INVENTION The present inventors have developed an anti-MRS
As a result of intensive studies based on a new viewpoint of providing A-type artificial marble, when aluminum hydroxide as an inorganic filler of artificial marble and an antibacterial agent containing zinc oxide were used in combination, both components were unexpected Have been found to provide an excellent MRSA property, and have completed the present invention.

That is, the present invention relates to a resin component (a) 90-
10 parts by weight, 10 to 90 parts by weight of aluminum hydroxide (b), and antibacterial agent (c) containing zinc oxide based on 100 parts by weight of the resin component and aluminum hydroxide in total
An artificial marble composition comprising 0.1 to 10.0 parts by weight.

The present invention also relates to an anti-MRSA artificial marble obtained by curing the above composition, and further comprising a surface processing step of grinding a surface of a cured product obtained by curing the composition. It is a manufacturing method of.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail.

The resin component (a) used in the present invention includes:
The resin is not particularly limited as long as it can be cured to form an artificial marble, and various monomers conventionally known as resin components for artificial marble, a mixture of a monomer and a polymer, and the like can be appropriately used. For example, when producing acrylic artificial marble or unsaturated polyester artificial marble, various (meth) acrylic monomers or unsaturated polyesters may be used. In particular, it is desirable to constitute the resin component (a) using at least one selected from the group consisting of melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and unsaturated polyester. In this specification, “(meth) acryl” means “acryl and / or methacryl”.

Specific examples of the (meth) acrylic monomer used for the resin component (a) include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate,
(Meth) acrylates such as benzyl (meth) acrylate; glycidyl (meth) acrylate; melamine (meth) acrylate, and the like. A vinyl monomer for copolymerization may be used together with the (meth) acrylic monomer, if necessary. As the vinyl monomer for copolymerization,
Styrene, α-methylstyrene, vinyltoluene, acrylonitrile, vinyl acetate and the like can be mentioned. The amount of the vinyl monomer for copolymerization is desirably 10 parts by weight or less per 100 parts by weight of the monomer used.

Further, as a crosslinking agent for crosslinking the resin component (a), ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate Acrylate, 1,6-
Has multiple polymerizable double bonds in the molecule like hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, polybutylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, etc. It is desirable to use a crosslinkable vinyl monomer in combination. Of these, ethylene glycol di (meth) acrylate is particularly preferred. The amount of the crosslinkable vinyl monomer used is usually 0.05 to 20 parts by weight.

When an acrylic monomer is used as the resin component (a), it is desirable to use the mixture as a mixture of the acrylic monomer and a polymer thereof. This mixture has a desired viscosity in which (ii) an acrylic polymer is dissolved in a monomer liquid containing (i) an acrylic monomer as a main component and optionally other vinyl monomers for copolymerization. Particularly preferred is a mixture (syrup) in a state. As a method of obtaining this syrup, for example, a method of polymerizing an acrylic monomer and stopping the progress of polymerization at a certain point, or, for example, using an acrylic monomer obtained by suspension polymerization as a main structural unit There is a method of dissolving a bead polymer in an acrylic monomer. The advantages of using a mixture such as syrup include, for example, 1) when aluminum hydroxide is added to the resin component, sedimentation of the aluminum hydroxide can be prevented by controlling the viscosity, and 2) the curing time of the resin component is shortened. And the like.

The unsaturated polyester used for the resin component (a) is obtained by mixing an unsaturated polybasic acid or an acid anhydride thereof (and optionally a saturated polybasic acid or an acid anhydride thereof) with a polyhydric alcohol. Obtained by polycondensation. In particular, α,
Unsaturated polyesters obtained by polycondensation of β-unsaturated dibasic acids or anhydrides thereof, aromatic saturated dibasic acids or anhydrides thereof, and glycols are preferred. In some cases, an unsaturated polyester obtained by using an aliphatic or alicyclic saturated dibasic acid or an acid anhydride thereof in combination is also desirable. In addition, those in which the terminal of the unsaturated polyester is vinyl-modified, and those in which the terminal of the epoxy skeleton is vinyl-modified can also be used. When an unsaturated polyester is used, an unsaturated monomer (such as an α, β-unsaturated monomer) for crosslinking the unsaturated polyester is usually used.
Then, this unsaturated polyester is dissolved and used as a so-called unsaturated polyester resin. This ratio is such that the unsaturated polyester is 30 to 80 parts by weight, the unsaturated monomer is 70 to 2 parts by weight.
0 parts by weight is desirable.

Α, for synthesizing unsaturated polyesters
Examples of β-unsaturated dibasic acids or acid anhydrides include maleic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid, chlormaleic acid and esters thereof, and glycols such as ethylene glycol , Propylene glycol, diethylene glycol, dipropylene glycol, 1,3-butanediol, 1,
4-butanediol, 2-methylpropane-1,3-diol, neopentyl glycol, triethylene glycol, tetraethylene glycol, 1,5-pentanediol, 1,6-hexanediol, bisphenol A, hydrogenated bisphenol A, Examples include ethylene glycol carbonate. As the aromatic saturated dibasic acid or its anhydride used together if necessary, phthalic acid,
Phthalic anhydride, isophthalic acid, terephthalic acid, nitrophthalic acid, diphenic acid, tetrahydrophthalic anhydride, halogenated phthalic anhydride and the like, and if necessary, an aliphatic or alicyclic saturated dibasic acid or an acid thereof used in combination. Examples of the anhydride include oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, glutaric acid, and esters thereof. Unsaturated monomers for crosslinking unsaturated polyester include styrene, vinyltoluene, α-methylstyrene, chlorostyrene, dichlorostyrene, vinylnaphthalene, ethylvinylether, methylvinylketone, methyl (meth) acrylate, ethyl Examples include vinyl compounds such as (meth) acrylate and allyl compounds such as diallyl phthalate, diallyl fumarate and diallyl succinate.

In order to cure the resin component (a) as described above, a curing catalyst is usually used in combination. Examples of the curing catalyst include tertiary butyl peroxymaleic acid, benzoyl peroxide, cumene hydroperoxide, tertiary butyl hydroperoxide, dicumyl peroxide, acetyl peroxide, lauroyl peroxide, azobisisobutyronitrile, and the like. . When polymerized and cured at normal temperature, for example, a combination of a peroxide and an amine, a peroxide and a sulfinic acid, a combination of a peroxide and a cobalt compound, a peroxy compound such as tertiary butyl peroxymaleic acid, and glycol dimercaptoacetate And a combination with a mercaptan compound and water (such as deionized water). When an unsaturated polyester resin is used, a curing catalyst includes methyl ethyl ketone peroxide and the like, and a curing accelerator includes cobalt naphthenate and the like.

Aluminum hydroxide (b) used in the present invention
Is an inorganic filler that gives artificial marble a desired appearance, hardness and elastic modulus. In the present invention, aluminum hydroxide (b) is also a component that exerts an enhancing effect on the effectiveness of the antibacterial agent (c) containing zinc oxide and imparts anti-MRSA properties. Aluminum hydroxide (b)
It is used in an amount of 10 to 90 parts by weight based on a total of 100 parts by weight of the resin component and aluminum hydroxide. With respect to the lower limit of the amount used, it is desirably 20 parts by weight or more, preferably 45 parts by weight or more, and more preferably 50 parts by weight or more. The upper limit is desirably 88 parts by weight or less. With respect to the particle size of the aluminum hydroxide (b), the average particle size is 10 to 10 in consideration of the effect of the increase in viscosity upon mixing with the resin component (a).
100 μm is preferred. In addition, methacrylsilane (γ-
Those surface-treated with a silane coupling agent such as methacryloxypropyltrimethoxysilane) are preferred.

Inorganic fillers other than aluminum hydroxide also include
They can be used together as long as the effects of the present invention are not impaired. As the inorganic filler used in combination, calcium hydroxide, magnesium hydroxide, powdered talc, powdered quartz, fine silica, diatomaceous earth, gypsum, powdered glass, clay mineral, powdered chalk,
Marble, limestone, aluminum silicate, calcium silicate, borax, calcium sulfite, calcium sulfate, barium sulfate, silicon dioxide, calcite, base stone, titanium oxide,
Antimony trioxide, clay, aluminum oxide, calcium carbonate, nickel powder, iron powder, zinc powder, copper powder, iron oxide,
Examples include glass beads, glass fibers, glass fillers having a barium salt or a lead salt, silica gel, zirconium oxide, and tin oxide.

The antibacterial agent (c) used in the present invention is an anti-MRS
It is a component to be dispersed in artificial marble in combination with aluminum hydroxide (b) for the purpose of imparting A properties. This antibacterial agent (c) is not particularly limited as long as it contains zinc oxide as an active ingredient, and various conventionally known antibacterial agents can be used. Specifically, a powder of zinc oxide, a mixture of zirconium phosphate and silver oxide / zinc oxide (for example, Novalon, trade name, manufactured by Toagosei Co., Ltd.), or a mixture of zeolite and silver oxide / zinc oxide (for example, product of Sinanen Co., Zeomics), a mixture of calcium phosphate and zinc oxide (for example, trade name: APASIDER manufactured by Sangi) and the like can be used. When zinc oxide powder is used alone, the average particle size is preferably 0.2 μm to 100 μm,
2 μm to 50 μm is more preferable, and 0.2 μm to 10 μm
m is particularly preferred. The amount of the antibacterial agent (c) used is based on 100 parts by weight of the resin component and aluminum hydroxide in total.
0.1 to 10.0 parts by weight. Further, the lower limit of the amount is preferably at least 0.3 part by weight, more preferably at least 0.5 part by weight. The upper limit is desirably 8.0 parts by weight or less.

In the present invention, in addition to the above-mentioned components, various components conventionally known as added components of artificial marble can be used without limitation. For example, pigments, dyes such as white (titanium oxide, zinc sulfide), yellow (iron oxide yellow), black (iron oxide black), red (iron oxide red), blue (ultramarine blue, phthalo blue),
Examples include ultraviolet absorbers, flame retardants, release agents, fluidizing agents, thickeners, polymerization inhibitors, antioxidants, and the like.

By polymerizing and curing the composition of the present invention, an anti-MRSA artificial marble can be obtained. Examples of the polymerization method include redox polymerization and a method of performing heat polymerization after adding a thermal initiator. For example, redox polymerization of a polymer having an acrylic monomer as a main constituent unit is performed by acyl peroxide such as benzoyl peroxide and N, N-dimethylaniline, N, N-diethylaniline, N, N-dimethylparanyl. It is performed by a combination with an amine compound such as toluidine or a combination of a peroxyl compound such as tertiary butyl peroxymaleic acid and a mercaptan compound such as glycol dimercaptoacetate.

By hardening the composition of the present invention in a mold, an anti-MRSA artificial marble having a desired shape can be obtained.
As a molding method, any method such as cast molding, injection molding, and compression molding can be applied, but cast molding is preferable. Also,
The surface of the cured product is desirably ground using a sandpaper, a sponge-like abrasive (trade name: Scotch Bright) or the like.

Further, in order to make the surface of the artificial marble a desired stone-grain pattern or a sand-grain pattern, artificial marble of the same material is crushed in advance and mixed with the composition of the present invention. By molding, artificial marble having such a pattern can be obtained. In this case, the crumbs do not necessarily need to contain the antibacterial agent (c). Even when 10 to 20% by weight of an antibacterial agent (c) -free crumb is added, the same good anti-MRSA is obtained.
Sex is obtained.

[0023]

Embodiments of the present invention will be described below. In the following description, “parts” and “%” are based on weight unless otherwise specified.

Example 1 and Comparative Example 1 Poly (methyl methacrylate) and methyl methacrylate (weight ratio 2:
A syrup consisting of 8) was prepared. 25 of this syrup
The viscosity at ° C was 50 centipoise. Example 1
In this case, this syrup and aluminum hydroxide powder having an average particle size of 45 μm (manufactured by Nippon Light Metal Co., Ltd.)
Parts (the ratio of aluminum hydroxide is described in Table 1), tertiary butyl peroxymaleic acid (manufactured by NOF Corporation, trade name: Perbutyl MA) 0.3 part, ethylene glycol dimethacrylate (manufactured by Mitsubishi Rayon Co., trade name: acrylester) ED) 0.35 part, ethylene glycol dimercaptoacetate 0.15 part, deionized water 0.1 part, white pigment (titanium oxide) 0.9 part, average particle size 0.5 as antibacterial agent
A predetermined amount of 5 μm zinc oxide (manufactured by Sakai Chemical Co., Ltd.) (see Table 1)
Mix and degas in vacuo with stirring. By pouring the vacuum degassed mixture into a mold and curing at room temperature,
A sheet-shaped cured product having a thickness of 13 mm was obtained. # This surface
Grinding with 120 sandpaper gave acrylic artificial marble. This surface roughness was 1.7 μm.

In Comparative Example 1, as shown in Table 1,
An acrylic artificial marble was obtained in the same manner as in Example 1 except that one of zinc oxide and aluminum hydroxide powder as antibacterial agents was not added.

The acrylic artificial marble obtained in Example 1 and Comparative Example 1 was tested for anti-MRSA property and anti-E. Coli property. The test method is as shown below. 1) Test bacterium Staphylococcus aureus IID 1677 (MRSA) Escherichia coli IFO 3301 (Escherichia coli)
301 is publicly available from the Fermentation Research Institute. 2) Preparation of bacterial solution 35 ° C., 16 to 2 in normal broth medium (manufactured by Eiken Chemical Co., Ltd.)
A culture solution of the test bacteria cultured with shaking for 0 hours was diluted 10,000 times with a sterilized phosphate buffer to obtain a bacterial solution. 3) Test operation 0.5 ml of the bacterial solution was dropped on the test surface of the sample and stored in a closed system at 25 ° C, and the viable cell count of the sample was measured 6 hours and 24 hours after the storage. The same test was performed using 0.5 ml of the bacterial solution dropped on a sterile plastic petri dish as a control sample. 4) Viable cell count Samples and control samples were transferred to SCDLP medium (Nippon Pharmaceutical Co., Ltd.).
The cells were washed out with 10 ml each, and the number of viable cells was measured by a pour plate culture method (cultured at 35 ° C. for 48 hours) using a standard agar medium, and the number of viable cells was converted per specimen and control sample.

The results are shown in Tables 1 and 2 below.

[0028]

[Table 1]

[0029]

[Table 2] As shown in Table 1, excellent anti-MR was obtained in Example 1 in which zinc oxide and aluminum hydroxide powder were used in combination as antibacterial agents.
Comparative Example 1 in which SA property is expressed but only one of them is added
Does not provide sufficient anti-MRSA properties. In addition, the results shown in Table 2 show that even when zinc oxide and aluminum hydroxide are used in combination, no particularly excellent effect is exhibited in terms of anti-Escherichia coli properties. That is, it has no anti-E.
It shows the specialty of the present invention.

Example 2 and Comparative Example 2 A mixture of zirconium phosphate, silver oxide, and zinc oxide (trade name: Novalon AGZ-330, manufactured by Toagosei Co., Ltd .; hereinafter, abbreviated as "Novalon") was used as an antibacterial agent. Example 1 except that
An acrylic artificial marble was prepared in the same manner as in Comparative Example 1, and tested for anti-MRSA property (elapsed 6 hours after storage). The results are shown in Table 3 below.

[0031]

[Table 3] As shown in Table 3, excellent anti-MR was obtained in Example 2 in which Novalon and aluminum hydroxide powder were used in combination as antibacterial agents.
Comparative Example 2 in which SA property is exhibited but only one of them is added
Does not provide sufficient anti-MRSA properties.

Example 3 Zinc oxide having a different particle size or purity (a) Sakai Chemical Co., Ltd., average particle size 0.26 to 0.28 μm
m, purity 99.5%, (b) average particle size 0.5-0.6μ
m, purity 99.5%, (c) average particle size 0.5 to 0.6 μm
m, purity 99.0%, except that
Acrylic artificial marble is prepared in the same manner as in
Tested for gender. The results are shown in Table 4 below.

[0033]

[Table 4] As shown in Table 4, even if the particle size of zinc oxide is changed, the same excellent anti-MRSA property is exhibited.

Example 4 Acrylic artificial marble was prepared in the same manner as in Example 1 except that deionized water (curing co-catalyst) was not used, and tested for anti-MRSA property.
The results are shown in Table 5 below.

[0035]

[Table 5] As shown in Table 5, when an antibacterial agent containing zinc oxide and aluminum hydroxide are used in combination, excellent anti-MRSA properties are exhibited regardless of the presence or absence of deionized water (curing promoter).

<Example 5> An artificial marble prepared in advance (the same as Example 1 except that it does not contain the antibacterial agent (c))
Crushed, crumbs of 7-10 mesh
I got Add this crunch to the mixture for 10-20
Acrylic artificial marble was prepared and tested for anti-MRSA properties in the same manner as in Example 2 except that it was added by weight% (described in Table 6). The results are shown in Table 6 below.

[0037]

[Table 6] As shown in Table 6, one crunch containing no antibacterial agent (c) was added.
Even when 0 to 20% by weight is added, the same good anti-MRSA property can be obtained.

Comparative Example 3 An acrylic artificial marble was prepared in the same manner as in Example 1 except that zinc sulfide was used instead of zinc oxide, and tested for anti-MRSA and anti-E. Coli properties. The results are shown in Table 7 below.

[0039]

[Table 7] As shown in Table 7, when zinc sulfide was used, it was found that the excellent effects as in the present invention could not be obtained at all.

Example 6 and Comparative Example 4 An unsaturated polyester resin comprising a mixture of styrene and styrene with an unsaturated polyester obtained by polycondensation of phthalic anhydride, fumaric acid and ethylene glycol (manufactured by Showa Polymer Co., Ltd.) Rigolac), aluminum hydroxide powder (manufactured by Nippon Light Metal Co., Ltd.) having an average particle diameter of 45 μm, and a total of 100 parts (the ratio of aluminum hydroxide is described in Table 8), 1 part of a curing catalyst (55% methyl ethyl ketone peroxide), and curing acceleration 0.15 parts of an agent (6% cobalt naphthenate), 0.9 parts of white pigment (titanium oxide), and a predetermined amount of zinc oxide (manufactured by Sakai Chemical Co., Ltd.) having an average particle size of 0.55 μm as an antibacterial agent (see Table 8) Mix and degas in vacuo with stirring. The vacuum degassed mixture was poured into a mold to obtain a 13 mm-thick sheet-shaped cured product. This surface was ground with # 120 sandpaper to obtain an unsaturated polyester artificial marble. This surface roughness was 1.7 μm. In this example, as in Example 1, tertiary butyl peroxymaleic acid 0.35 part, ethylene glycol dimethacrylate 0.35 part, ethylene glycol dimercaptoacetate 0.15 part, deionized 0.1 part of water may be used.

In Comparative Example 4, as shown in Table 8,
Unsaturated polyester artificial marble was obtained in the same manner as in Example 6, except that one of zinc oxide and aluminum hydroxide powder as antibacterial agents was not added.

The unsaturated polyester artificial marbles obtained in Example 6 and Comparative Example 4 were tested for anti-MRSA property and E. coli property. The results are shown in Tables 8 and 9 below.

[0043]

[Table 8]

[0044]

[Table 9] As shown in Tables 8 and 9, unsaturated polyester artificial marble also exhibits a special and excellent effect on the anti-MRSA property of the present invention, similarly to acrylic artificial marble (Tables 1 and 2).

Example 7 and Comparative Example 5 Unsaturated polyester artificial marble was prepared and tested for anti-MRSA properties in the same manner as in Example 6 except that Novalon was used as an antibacterial agent (6 hours after storage). Elapse). The results are shown in Table 10 below.

[0046]

[Table 10] As shown in Table 10, the effect on the anti-MRSA property of the present invention is exhibited also in the unsaturated polyester artificial marble, similarly to the acrylic artificial marble (Table 3).

<Example 8> Zinc oxide having different particle size or purity (a) manufactured by Sakai Chemical Co., Ltd., average particle size 0.26 to 0.28 μm
m, purity 99.5%, (b) average particle size 0.5-0.6μ
m, purity 99.5%, (c) average particle size 0.5 to 0.6 μm
Example 6 except that m, purity 99.0% was used.
Produce unsaturated polyester artificial marble in the same way as
Tested for anti-MRSA properties. The results are shown in Table 11 below.
Shown in

[0048]

[Table 11] As shown in Table 11, similarly to the acrylic artificial marble (Table 4), the effect of the unsaturated polyester artificial marble on the anti-MRSA property of the present invention is exhibited.

Example 9 An unsaturated polyester artificial marble was prepared in the same manner as in Example 6 except that deionized water (curing promoter) was not used, and tested for anti-MRSA property. The results are shown in Table 12 below.

[0050]

[Table 12] As shown in Table 12, the effect on the anti-MRSA property of the present invention is exhibited also in the unsaturated polyester artificial marble, similarly to the acrylic artificial marble (Table 5).

Example 10 An artificial marble (same as that of Example 6 except that the antibacterial agent (c) was not contained) was crushed to obtain a 7 to 10 mesh crunch. Was. This crunch is 10 to 10
An unsaturated polyester artificial marble was prepared and tested for anti-MRSA properties in the same manner as in Example 7, except that 20% by weight (described in Table 13) was added. The results are shown in Table 13 below.

[0052]

[Table 13] As shown in Table 13, similarly to the acrylic artificial marble (Table 6), the effect of the unsaturated polyester artificial marble on the anti-MRSA property of the present invention is exhibited.

Comparative Example 6 Unsaturated polyester artificial marble was prepared in the same manner as in Example 6 except that zinc sulfide was used instead of zinc oxide, and tested for anti-MRSA property and anti-E. Coli property. The results are shown in Table 14 below.

[0054]

[Table 14] As shown in Table 14, when zinc sulfide was used, it was found that the excellent effects as in the present invention could not be obtained at all.

[0055]

As described above, the composition of the present invention comprises:
This is a composition capable of providing an artificial marble having anti-MRSA properties, which could not be obtained by the prior art, by curing and molding.

The artificial marble of the present invention is an artificial marble having an anti-MRSA property, which cannot be obtained by the prior art. Further, the production method of the present invention is a method that can be implemented simply and well.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI C08L 33/06 C08L 33/06 33/14 33/14 67/06 67/06 (58) Investigated field (Int.Cl. ⁷ , DB name) C08L 1/00-101/16 C08K 3/00-13/08 C04B 26/02-26/28 A01N 25/10 A01N 59/16

Claims (6)

(57) [Claims] 1. An antibacterial agent containing zinc oxide based on 90 to 10 parts by weight of a resin component (a), 10 to 90 parts by weight of aluminum hydroxide (b), and 100 parts by weight of the resin component and aluminum hydroxide in total. (C) 0.1 to 10.0
An artificial marble composition comprising parts by weight. 2. The resin component (a) according to claim 1, wherein the resin component (a) is composed of at least one selected from the group consisting of melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and unsaturated polyester. Artificial marble composition. 3. The artificial marble composition according to claim 1, wherein the resin component (a) comprises a mixture of an acrylic monomer and a polymer thereof. 4. The cross-linking agent for cross-linking the resin component (a), further comprising a cross-linkable vinyl monomer having two or more vinyl groups in a molecule. Artificial marble composition. 5. An anti-MRSA artificial marble obtained by curing the composition according to claim 1. Description: 6. A method for producing an anti-MRSA artificial marble, comprising a surface processing step of grinding a surface of a cured product obtained by curing the composition according to claim 1.