JP2001190344A - Artificial marble and kitchen counter, bathtub, or washing floor using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an artificial marble, an artificial marble used in a section where water is used in particular, from getting dirty. SOLUTION: There is provided an artificial marble excellent in water- repellence, oil-repellence, antifouling property, and antibacterial and mildewproof property, which is obtained by chemically bonding a silane-based surface active agent 4 having-CF3 group at one end and having a chlorosilyl group or alkoxysilyl group at the other end on the surface of an artificial marble 3 treated in a forming process with a resin component and an inorganic filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial marble, and more particularly to an artificial marble having a fine uneven structure on the surface and having excellent water / oil repellency to which a silane-based surfactant containing fluorine is bonded. is there.

[0002]

2. Description of the Related Art Artificial marble is generally composed of resins, inorganic fillers, low-shrinkage agents, catalysts, cross-linking agents, pigments, etc., and is molded by a casting method, a hot press method, and the like, and is provided with a washing place, a countertop, and a kitchen top plate. It is used for sanitary applications, furniture, interior materials, etc. Relatively inexpensive, excellent in workability, workability, warm water resistance, strength, weather resistance, etc., it has an appearance close to that of natural marble, and has a sense of quality.

[0003]

However, the kitchen,
Artificial marble used in places around water, such as a washroom or a bathroom, is apt to be stained, and bacteria and fungi are multiplied on the bait using the stains, which has a problem in appearance and hygiene.

[0004]

In order to solve the above-mentioned problems, the present invention comprises a resin component and an inorganic filler, forms a fine uneven structure on the surface of a molded artificial marble, and forms -CF at one end. A silane-based surfactant having _three groups and having a chlorosilyl group or an alkoxysilyl group at the other end is chemically bonded.

When the surface of the artificial marble has a fine uneven structure, the following Wenzel's equation holds.

Γ cos θ = cos θ ′ where γ: true artificial marble surface area / apparent artificial marble surface area θ: true liquid (water) contact angle θ ′: apparent liquid (water) contact angle Wenzel equation Therefore, if θ> 90 °, θ <θ ′. Therefore, if the surface free energy of the artificial marble is sufficiently small, an artificial marble having an extremely large water repellency can be obtained by a synergistic effect with the fine uneven structure on the surface. As a result, the antifouling property is greatly improved because the affinity with the dirt component is reduced. In addition, bacteria and molds are also less likely to adhere to their prey, so that their growth is suppressed.

According to the present invention, a silane-based surfactant containing a fluorocarbon group having a fine uneven structure on the surface is bonded to the surface of the artificial marble in the form of a monomolecular film. It can provide highly oily artificial marble.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The artificial marble of the present invention contains a resin component and an inorganic filler, and has a —CF ₃ group at one end and a chlorosilyl group or an alkoxysilyl group at the other end on the surface of a molded artificial marble. It is an artificial marble that is formed by chemically bonding a silane-based surfactant having a group and has a fine uneven structure on the surface.

[0009] A reduction in surface free energy due to exposure of fluorocarbon groups on the surface of the artificial marble,
The water repellency of the artificial marble is improved due to a synergistic effect with the fine uneven structure, the activity of the artificial marble is reduced, and the antifouling property is improved. Furthermore, since the adhesion of the dirt components to the surface of the artificial marble is reduced, it is possible to suppress the growth of bacteria and mold that feed on them. In addition, since it is chemically bonded to the artificial marble base material at the interface with the artificial marble and is not peeled off practically as a single body with the base material, it has the effect of exhibiting a water-repellent and oil-repellent effect with excellent durability.

Further, the roughness of the fine uneven structure on the surface is 50
An artificial marble in which a silane-based surfactant having a fluorocarbon group at one end is chemically bonded to an artificial marble surface containing a resin component and an inorganic filler so as not to exceed 0 μm.

Then, the roughness of the fine uneven structure is 500 μm.
By not exceeding m, the greater the true surface area of the artificial marble, the greater the synergistic effect with the surfactant, the better the water repellency of the artificial marble surface and the lower the affinity with the dirt component . Furthermore, since the adhesion of the dirt components to the artificial marble surface is greatly reduced, the growth of bacteria and fungi that feed on them is greatly suppressed.

Further, the number of fluorine atoms in the molecule of the silane-based surfactant is 9 or more.

In the above structure, one end has -C.
It is desirable to use a molecule represented by the following general formula (Chemical formula 1) or the following general formula (Chemical formula 2) as a silane-based surfactant having an F ₃ group and having a chlorosilyl group or an alkoxysilyl group at the other end.

[0014]

Embedded image (Wherein, m represents an integer of 1 to 15, n = 0 to 15, and q = 0 to 2, R represents an alkyl group, and X represents a halogen atom or an alkoxy group.)

[0015]

Embedded image (Where m = 1-8, n = 0-2, where m + n = 1-1)
0, p = 5 to 25, and q = 0 to 2 represent integers, and A represents an oxygen atom (-O-), an oxycarbonyl group (-COO
-), Or a dimethylsilyl group (Si (CH ₃ ) _2- ), and X represents a halogen atom or an alkoxy group). It also has the effect of reducing the coefficient and improving the scratch resistance of the artificial marble itself.

The artificial marble has mechanical strength and weather resistance because the resin component is composed of at least one selected from the group consisting of melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and unsaturated polyester. It has excellent physical properties such as heat resistance and warm water resistance and chemical properties.

Further, since the resin component is composed of a mixture of an acrylic monomer and a polymer thereof, the artificial marble has excellent texture and physical properties such as mechanical properties, weather resistance and hot water resistance, and chemical properties. It will be excellent.

The inorganic filler added to the artificial marble is at least one of aluminum hydroxide and glass fiber.

The silane-based surfactant containing a fluorocarbon group is chemically bonded to the hydroxyl group of water (H ₂ O) adsorbed on the surface of the inorganic filler. For this reason, since the silane-based surfactant containing the fluorocarbon group is bonded only to the surface layer of the artificial marble, the physical properties and appearance of the artificial marble itself are not impaired, and the surfactant is a necessary minimum. The minimum amount is sufficient.

Further, water (H ₂ O) in which a silane-based surfactant containing a fluorocarbon group is previously adsorbed on the surface of the inorganic filler.
This is an artificial marble that is chemically bonded to a hydroxyl group of the above, added, blended and molded.

The inorganic filler added and blended is artificial marble, which is at least one of aluminum hydroxide and glass fiber.

For example, in the case where the surface is damaged after molding, the silane-based surfactant containing a fluorocarbon group is also exposed on the newly formed surface. The oil repellency is not impaired.

Further, a silane-based surfactant having a fine uneven structure on the surface and containing a fluorocarbon group is chemically bonded.
It is an artificial marble comprising a resin component, an inorganic filler and an antibacterial agent.

The antibacterial agent is artificial marble comprising at least one of inorganic antibacterial agents and at least one of organic antibacterial agents.

By containing an inorganic antibacterial agent, the growth of bacteria mainly causing slime etc. is suppressed. In addition, by containing an organic antibacterial agent, growth of mold is mainly suppressed. In addition, due to the synergistic effect of the finely uneven structure of the artificial marble surface and the chemically bonded surfactant, the adhesion of dirt components that feed on bacteria and mold is reduced, so a small amount of inorganic and organic antibacterial agents are added. Has sufficient antibacterial and antifungal effects. Therefore, the influence on the physical and chemical properties of the artificial marble is small, and the properties of the artificial marble can be sufficiently exhibited.

A resin component composed of a mixture of an acrylic monomer and a polymer thereof having a fine uneven structure on the surface and chemically bonded to a silane-based surfactant having a —CF ₃ group at one end, and an inorganic component. This is an artificial marble kitchen counter made of filler.

Since the resin component is composed of a mixture of an acrylic monomer and a polymer thereof, the kitchen counter has an excellent texture, and furthermore has physical and chemical properties such as mechanical properties, weather resistance and hot water resistance. It will be excellent. And, due to the synergistic effect of the fine uneven structure of the kitchen counter surface and the decrease in surface free energy due to the chemical bonding of the silane-based surfactant having a fluorocarbon group, the kitchen counter surface has extremely improved water repellency,
The activity against soil components is reduced, and the antifouling property is improved. Furthermore, since the adhesion of the dirt component to the kittin counter surface is reduced, the growth of mold and bacteria that feed on them is suppressed.

A resin component consisting of a mixture of an acrylic monomer and a polymer thereof having a fine uneven structure on the surface and chemically bonded to a silane-based surfactant having a —CF ₃ group at one end, and an inorganic component. It is an artificial marble bathtub composed of a filler.

Since the resin component is composed of a mixture of an acrylic monomer and a polymer thereof, the bathtub is disturbed in texture, and furthermore has physical properties such as mechanical properties, weather resistance and hot water resistance and chemical properties. It will be excellent. And, due to the synergistic effect of the fine uneven structure on the surface of the bathtub and the decrease in surface free energy due to the chemical bonding of the silane-based surfactant having a fluorocarbon group, the bathtub surface has extremely improved water repellency, The activity is reduced and the antifouling property is improved. Furthermore, since the adhesion of the dirt components to the bathtub surface is reduced, the growth of bacteria and fungi that feed on them is also suppressed.

Further, a resin component comprising a mixture of an acrylic monomer and a polymer thereof having a fine uneven structure on the surface and chemically bonded to a silane-based surfactant having a —CF ₃ group at one end, and an inorganic material. It is a washing place for artificial marble composed of filler.

Since the resin component is composed of a mixture of an acrylic monomer and a polymer thereof, the washing place is disturbed by the texture, and furthermore, physical and chemical properties such as mechanical properties, weather resistance and hot water resistance. It will be excellent. And
Due to the synergistic effect of the fine uneven structure of the washing surface and the reduction of surface free energy due to the chemical bonding of the silane-based surfactant having a fluorocarbon group, the washing surface is extremely improved in water repellency and has an activity against dirt components. It decreases and the antifouling property improves. Furthermore, since the adhesion of the dirt components to the bathtub surface is reduced, the growth of bacteria and fungi that feed on them is also suppressed.

[0032]

Embodiments of the present invention will be described below. In the following examples,% means% by weight.

The roughness of the uneven structure in the present invention may not be uniform. The shape of the uneven structure is not particularly limited, and may be any of a spherical shape, a scale shape, a prism shape, a column shape, a pyramid shape, a conical shape, a needle shape, and the like. Further, the shape may be a complicated combination of those shapes. There is no particular limitation on the method of forming such an uneven structure. As a method of artificially processing, (1) a method of sanding the surface of artificial marble (2) a sand blast method (3) a method of cutting a V-groove or a cross hatch with a cutter (4) gold having fine irregularities on the surface There is a method of copying the uneven structure of the mold onto the surface by molding and processing artificial marble with a mold, but the method is not particularly limited.

The roughness of the fine uneven structure is 500 μm.
The following is preferable. When the thickness exceeds 500 μm, the effect is reduced. Further, when the roughness becomes extremely fine and approaches a flat surface, the effect is reduced.

The resin component in the present invention is not particularly limited as long as it is a resin that can be cured to form artificial marble, and various monomers and monomers and polymers conventionally known as resin components of artificial marble are used. A mixture or the like can be used as appropriate. For example, unsaturated polyester, melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and the like can be mentioned.

As the silane-based surfactant containing a fluorocarbon group, a general formula F (CF ₂ ) _m (CH ₂ ) _n SiR _q X _3-q [where m = 1 to 15, n = 0-15, m + n = 1-30
(The optimum value of the molecular orientation was 10 to 30 for chemical bonding to the artificial marble surface), each integer of q = 0 to 2, R represents an alkyl group, X represents halogen base paper or alkoxy. Represents a group] or F (CF ₂ ) _m (CH ₂ ) _n A (CH ₂ ) _p Si (CH ₃ ) _q X
_3-q [where m = 1-8, n = 0-2, m + n = 1-10, p =
5 to 25, q = 0 to 2 each represents an integer, and A represents an oxygen atom (—O—), an oxycarbonyl group (—COO—), or a dimethylsilyl group (Si (CH ₃ ) ₂ —); X
Represents a halogen atom or an alkoxy group], for example, containing a chlorosilyl group. (1) CF ₃ CH ₂ O (CH ₂ ) ₁₅ SiCl ₃ (2) CF ₃ (CH ₂ ) ₂ Si (CH ₃ ) ₂ (CH ₂ ) ₁₅ S
iCl ₃ (3) F (CF ₂ ) ₄ (CH ₂ ) ₂ Si (CH ₃ ) ₂ (CH
₂ ) ₉ SiCl ₃ (4) CF ₃ COO (CH ₂ ) ₁₅ SiCl ₃ (5) CF ₃ (CF ₂ ) ₇ (CH ₂ ) ₂ SiCl ₃ , but is not limited thereto. Alternatively, a substance in which a chlorosilyl group is substituted with an alkoxysilyl group can be used.

Examples of the antibacterial agent include, but are not limited to, inorganic antibacterial agents such as silver nitrate, silver sulfate, and silver chloride, silver, copper, zinc, and tin-supported zeolite and silica gel. Examples of the organic antibacterial agent include phenyl ether derivatives such as 10,10′-oxybisphenoxaarsine, N-haloalkylthio compounds such as cyclofluanide, and imidazole derivatives such as 2- (4-thiazolyl) benzimidazole (abbreviated as TBZ). Examples include, but are not limited to, quaternary ammonium salts such as 2,3,5,6 tetracolor-4- (methylsulfolyl) pyridine.

Example 1 100 parts by weight of an unsaturated polyester resin consisting of a mixture of an isophthalic unsaturated polyester and styrene, 200 parts by weight of aluminum hydroxide powder having an average particle size of 45 μm, and a curing catalyst (50% benzoyl peroxide) 3) parts by weight, curing accelerator (dimethylaniline)
0.03 parts by weight were mixed, and the mixture was degassed under vacuum with stirring. This vacuum degassed mixture was poured inward and cured to obtain an unsaturated polyester artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting. An unsaturated polyester artificial marble having a smooth surface without forming a fine uneven structure was used as Comparative Example 1.

Then, as shown in FIG. 1, the artificial marble previously well washed and the artificial marble substrate 1 of Comparative Example 1 are prepared. On the other hand, a mixed solution of a non-aqueous organic solvent consisting of 80% n-hexadecane, 12% carbon tetrachloride, and 8% chloroform was added to a silane-based surfactant containing a fluorocarbon group as F (CF ₂ ) ₄ (CH _{2 ) 2 O (CH 2) 15} SiCl 3 and 2 ×
A chemically adsorbed solution dissolved at a concentration of about 10 ^{−3 to} 5 × 10 ⁻² mol is prepared, and the artificial marble substrate 1 is immersed at room temperature for about 1 hour. At this time, the artificial marble substrate 1 does not necessarily need to be immersed in the chemical adsorption liquid, but may be applied or sprayed to bring the chemical adsorption liquid into contact with the artificial marble substrate 1.

As shown in FIG. 1, on the surface of the artificial marble,
Since the -OH group of H ₂ O adsorbed on aluminum hydroxide and glass fibers are added to and blended as an inorganic filler is exposed, the chlorosilyl groups of the chlorosilane-based surface active agent containing a fluorocarbon group - The OH group reacts to form a bond of the following formula (Formula 3) on the surface, and the surface of the artificial marble base material is formed into a monomolecular film containing a fluorocarbon group as shown in FIG. It could be formed in a state chemically bonded through oxygen.

[0041]

Embedded image Further, in the above embodiment, CF ₃ (CF ₂ ) ₇ (CH ₂ ) ₂ SiC was used as the silane-based surfactant containing a fluorocarbon group.
Comparative example those prepared using _{l 3 2, CF 3 CH 2} O
Comparative Example 3 was prepared using (CH ₂ ) ₁₅ SiCl ₃ .

Example 2 100 parts by weight of an unsaturated polyester resin consisting of a mixture of an isophthalic unsaturated polyester and styrene, 200 parts by weight of aluminum hydroxide powder having an average particle size of 45 μm, a curing catalyst (50% benzoyl peroxide) 3) parts by weight, curing accelerator (dimethylaniline)
0.03 parts by weight, 1 part by weight of silver zeolite and TBZ
0.5 parts by weight were mixed and degassed under vacuum while stirring. This vacuum degassed mixture was poured into a mold and cured to obtain an unsaturated polyester artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting.

F (CF ₂ ) ₄ (CH ₂ ) _{2 is} used as a silane-based surfactant containing a fluorocarbon group on the surface of the artificial marble.
O (CH ₂ ) ₁₅ SiCl ₃ was chemically bonded in the same manner as in Example 1.

Example 3 100 parts by weight of an unsaturated polyester resin composed of a mixture of an isophthalic unsaturated polyester and styrene, 200 parts by weight of aluminum hydroxide powder having an average particle diameter of 45 μm, a curing catalyst (50% benzoyl peroxide) 3) parts by weight, curing accelerator (dimethylaniline)
0.03 parts by weight, 2 parts by weight of silver zeolite, and 1 part by weight of TBZ were mixed, and the mixture was degassed under vacuum with stirring. This vacuum degassed mixture was poured inward and cured to obtain an unsaturated polyester artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting. An unsaturated polyester artificial marble having a smooth surface without forming a fine uneven structure was used as Comparative Example 4.

On the surface of the artificial marble, F (CF ₂ ) ₄ (CH ₂ ) _{2 is} used as a silane-based surfactant containing a fluorocarbon group.
O (CH ₂ ) ₁₅ SiCl ₃ was chemically bonded in the same manner as in Example 1.

Example 4 100 parts by weight of a syrup composed of polymethyl methacrylate and methyl methacrylate (weight ratio 2: 8), 200 parts by weight of aluminum hydroxide powder having an average particle diameter of 45 μm, tertiary butyl peroxymaleic acid 0.5 parts by weight, 0.5 parts by weight of ethylene glycol dimethacrylate, and 0.3 parts by weight of ethylene glycol dimethylcaptoacetate were mixed, and the mixture was degassed under vacuum with stirring. This vacuum degassed mixture was poured into a mold and cured at room temperature to obtain an acrylic artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting. In addition, do not form a fine uneven structure,
Acrylic artificial marble having a smooth surface was used as Comparative Example 5.

On the surface of the artificial marble, F (CF ₂ ) ₄ (CH ₂ ) _{2 is} used as a silane-based surfactant containing a fluorocarbon group.
O (CH ₂ ) ₁₅ SiCl ₃ was chemically bonded in the same manner as in Example 1.

Example 5 100 parts by weight of a syrup composed of polymethyl methacrylate and methyl methacrylate (weight ratio 2: 8), 200 parts by weight of aluminum hydroxide powder having an average particle diameter of 45 μm, and tert-butyl peroxymaleic acid 0.5 parts by weight, 0.5 parts by weight of ethylene glycol dimethacrylate, 0.3 parts by weight of ethylene glycol dimethylcaptoacetate, and 1 part of silver zeolite
Parts by weight and 0.5 parts by weight of TBZ were mixed and degassed under vacuum with stirring. This vacuum degassed mixture was poured into a mold and cured at room temperature to obtain an acrylic artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting.

On the surface of the artificial marble, F (CF ₂ ) ₄ (CH ₂ ) _{2 is} used as a silane-based surfactant containing a fluorocarbon group.
O (CH ₂ ) ₁₅ SiCl ₃ was chemically bonded in the same manner as in Example 1.

Example 6 100 parts by weight of a syrup composed of polymethyl methacrylate and methyl methacrylate (weight ratio 2: 8), 200 parts by weight of aluminum hydroxide powder having an average particle size of 45 μm, tertiary butyl peroxymaleic acid 0.5 parts by weight, 0.5 parts by weight of ethylene glycol dimethacrylate, 0.3 parts by weight of ethylene glycol dimethylcaptoacetate, and silver zeolite 2
Parts by weight and 1 part by weight of TBZ were mixed and degassed under vacuum while stirring. This vacuum degassed mixture was poured into a mold and cured at room temperature to obtain an acrylic artificial marble. Furthermore, a fine uneven structure was formed on the surface of the artificial marble by sandblasting. An acrylic artificial marble having a smooth surface without forming a fine uneven structure was used as Comparative Example 6.

F (CF ₂ ) ₄ (CH ₂ ) _{2 is} used as a silane-based surfactant containing a fluorocarbon group on the surface of the artificial marble.
O (CH ₂ ) ₁₅ SiCl ₃ was chemically bonded in the same manner as in Example 1.

Example 7 100 parts by weight of a syrup composed of polymethyl methacrylate and methyl methacrylate (weight ratio 2: 8), 200 parts by weight of aluminum hydroxide powder having an average particle diameter of 45 μm, and tertiary butyl peroxymaleic acid 0.5 part by weight, 0.5 part by weight of ethylene glycol dimethacrylate, 0.3 part by weight of ethylene glycol dimethyl captoacetate, 2 parts by weight of silver zeolite, and 1 part by weight of TBZ were mixed and degassed while stirring. The vacuum degassed mixture was poured into a mold and cured at room temperature to obtain an acrylic artificial marble kitchen counter.

Further, a fine uneven structure was formed on the surface by a sand blast method. Then, F (CF ₂ ) ₄ (CH ₂ ) ₂ O (CH) is used as a silane-based surfactant containing a fluorocarbon group.
_{2) 1 5} chemisorption solution of SiCl ₃ was adjusted by the method of Example 1 was applied to the acrylic artificial marble kitchen counter, and the surfactant is chemically bonded to the surface.

Example 8 100 parts by weight of a syrup composed of polymethyl methacrylate and methyl methacrylate (weight ratio 2: 8), 200 parts by weight of aluminum hydroxide powder having an average particle diameter of 45 μm, tertiary butyl peroxymaleic acid 0.5 parts by weight, 0.5 parts by weight of ethylene glycol dimethacrylate, 0.3 parts by weight of ethylene glycol dimethylcaptoacetate, and silver zeolite 2
Parts by weight and 1 part by weight of TBZ were mixed and degassed under vacuum while stirring. The vacuum degassed mixture was poured into a mold and cured at room temperature to obtain an acrylic artificial marble bath.

Further, a fine uneven structure was formed on the surface by a sand blast method. Then, F (CF ₂ ) ₄ (CH ₂ ) ₂ O (CH) is used as a silane-based surfactant containing a fluorocarbon group.
_{2) 1 5} chemisorption solution of SiCl ₃ was adjusted by the method of Example 1 was applied to the acrylic artificial marble bath, and a surfactant is chemically bonded to the surface.

The water repellency of the surface of the artificial marble obtained in each of the examples and comparative examples was evaluated by measuring the wetting angle of water droplets with a contact angle meter (CA-Z type manufactured by Kyowa Interface Science Co., Ltd.). Further, stain resistance was confirmed according to JIS K3370. The stain resistance was compared visually, and the degree of contamination in Comparative Example 1 was evaluated as (△), worse than that (x), and better as (○), and relative evaluation was made. The results are shown in (Table 1).

[0057]

[Table 1] Next, the artificial marble obtained in each of Examples and Comparative Examples was tested for antibacterial performance and mold resistance. A 50 mm × 50 mm sample was cut out from the artificial marble, and 1 cc of a bacterial solution (Staphylococcus aureus and Escherichia coli) was added dropwise to each sample.
C. for 24 hours. Thereafter, the bacteria were washed out with a sterilized phosphate buffer. The number of the washed viable cells was measured by a pour plate method using a medium for cell count measurement. The results are shown in (Table 2).

[0058]

[Table 2] Aspergillus niger bacteria solution was sprayed on each sample (50 mm × 50 mm) placed on the agar medium and cultured at 25 ° C. for 7 days. The results are shown in (Table 3).

[0059]

[Table 3] As is clear from Table 1, the artificial marbles of Examples 1, 2, and 3 have remarkable water repellency as compared with Comparative Examples 1 and 4, and Examples 4, 5, and 6 with Comparative Examples 5 and 6, respectively. Improved.
Further, comparing Example 1 and Comparative Examples 2 and 3, the contact angle increases as the number of fluorine contained in the silane-based surfactant molecule increases, and when the number of fluorine is 9 or more, the artificial marble surface is increased. Was confirmed to have extremely high water repellency. Therefore, if this artificial marble is used, it is possible to prevent, for example, contamination of a unit bath or the like, which is mostly caused by water.

As is clear from Table 2, the artificial marbles of Examples 2 and 3 obtain a remarkable antibacterial effect on Staphylococcus aureus and Escherichia coli as compared with Comparative Example 1 and Examples 5 and 6 with Comparative Example 5. I was able to. The silane-based surfactant containing a fluorocarbon group (F (CF ₂ ) ₄ (CH ₂ ) ₂
O (CH ₂ ) ₁₅ SiCl ₃ ) did not adversely affect the antibacterial effect.

Further, as is clear from (Table 3), the embodiment
A few artificial marbles are compared to Comparative Example 1, and Examples 5 and 6 are compared.
As compared with Example 5, better antifungal performance was obtained. What
The silane-based surfactant containing a fluorocarbon group (F
(CF_Two)_Four(CH_Two)_TwoO (CH _Two)_FifteenSiCl_Three)by
No adverse effect on the antifungal effect was observed.

From these results, the combination of the inorganic antibacterial agent and the organic antibacterial agent with the silane-based surfactant containing a fluorocarbon group and the synergistic effect of the fine uneven structure on the surface of the artificial marble resulted in the formation of bacteria on the surface. This makes it possible to produce a clean and hygienic artificial marble, which is less likely to be soiled as food for mold and mold, and which suppresses the growth of bacteria and mold by adding a smaller amount of inorganic and organic antibacterial agents.

[0063]

According to the artificial marble of the present invention, the following effects can be obtained.

A fine concavo-convex structure is formed on the surface of the artificial marble, and a chlorosilane-based or alkoxysilane-based surfactant having a fluorocarbon group at one end is caused to undergo an adsorption reaction to be covalently bonded at the artificial marble base material interface. As a result, the artificial marble surface has excellent water and oil repellency, high antifouling properties, and high silane-based surface activity due to the synergistic effect of the fine uneven structure and the reduction of surface free energy due to the fluorocarbon groups exposed on the surface. This has the effect of providing an artificial marble with excellent durability in which the agent does not practically peel off. Furthermore, since the adhesion of the dirt component to the surface of the artificial marble is reduced, the growth of bacteria and fungi that feed on them is suppressed.

Further, since the organic group of fluorocarbon is exposed on the surface, the friction coefficient of the artificial marble is reduced, and the scratch resistance of the artificial marble itself is improved. Therefore, there is also an effect that an artificial marble having higher toughness than the artificial marble itself of the base material can be provided.

Further, the roughness of the fine uneven structure on the surface is set to 50.
By not exceeding 0 μm, the true surface area of the artificial marble surface increases drastically. As a result, a synergistic effect with a decrease in surface free energy due to a silane-based surfactant having a fluorocarbon group is increased, the water / oil repellency of the artificial marble surface is improved, and the affinity with a dirt component is reduced, The antifouling property is increased because the adhesion is reduced.

Further, the resin component is made of artificial marble composed of at least one selected from the group consisting of melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and unsaturated polyester, so that the mechanical strength is improved. It is possible to obtain artificial marble which is excellent in physical properties such as weather resistance and hot water resistance and chemical properties and which is rich in practical use.

Further, when the resin component is composed of an acrylic monomer and a polymer thereof, an artificial marble having an excellent antifouling property with particularly high quality can be obtained.

Further, water (H ₂ O) in which a silane-based surfactant having a fluorocarbon group is adsorbed on the surface of the inorganic filler in advance.
After chemically bonding to the hydroxyl group of the product, by adding and blending and molding and processing artificial marble, for example, if the surface is damaged after molding, the silane-based surfactant is also added to the newly surfaced part Exposed fluorocarbon group of
Also in this case, the water / oil repellency of the surface is not impaired.

Further, by containing an inorganic antibacterial agent and an organic antibacterial agent, it is possible to obtain artificial marble having strong antifouling properties against bacteria, molds and the like. In addition, the effect of the fine uneven structure on the surface of the artificial marble and the antifouling effect of the silane-based surfactant containing a fluorocarbon group exhibit a synergistic effect with the antibacterial effect of the antibacterial agent. The effect on the chemical properties is small, and it becomes possible to obtain artificial marble having extremely excellent antifouling performance.

A silane-based surfactant having a fine uneven structure on the surface and having a fluorocarbon group is chemically bonded.
By constituting a kitchen counter, bathtub or washing place with artificial marble consisting of a resin component consisting of a mixture of acrylic monomers and their polymers and inorganic fillers, it has excellent texture, furthermore mechanical properties, weather resistance, hot water resistance It is excellent in physical characteristics and chemical characteristics such as. And due to the synergistic effect of the fine uneven structure and the reduction of surface free energy by the silane-based surfactant, the water repellency of the kitchen counter, bathtub, or washing area surface is extremely improved, and the adhesion of dirt components to the surface is reduced, so that The growth of bacteria and molds that feed on is also suppressed.

[Brief description of the drawings]

FIG. 1 is a conceptual cross-sectional view of an artificial marble surface according to an embodiment of the present invention, which is enlarged to a molecular level.

FIG. 2 is a schematic cross-sectional view showing a state in which a silane-based surfactant having a fluorocarbon group is chemically adsorbed in a monomolecular film shape on artificial marble having a fine uneven structure on the surface according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial marble base | substrate 2 Silane-type surfactant containing a fluorocarbon group 3 Artificial marble which formed the fine uneven structure on the surface 4 Film of surfactant

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takahito Ishii 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term (reference) 2D032 AA00 AB03 4F209 AA21 AA38 AA41 AB11 AB16 AB25 AF01 AF09 AH49 PA01 4G028 CA02 CB08 CD02

Claims (13)

[Claims] 1. A comprising a resin component and an inorganic filler, molding the artificial marble surface, silane-based surface active agent having a chlorosilyl group or an alkoxysilyl group at the other end has a -CF ₃ group is chemically one end Combined artificial marble. 2. The artificial marble according to claim 1, wherein the roughness of the fine uneven structure does not exceed 500 μm. 3. The silane-based surfactant molecule having a fluorine number of 9
The artificial marble according to claim 1, which is as described above. 4. The resin composition according to claim 1, wherein the resin component is at least one selected from the group consisting of melamine (meth) acrylate, glycidyl (meth) acrylate, methyl (meth) acrylate and unsaturated polyester. Artificial marble according to the item. 5. The artificial marble according to claim 1, comprising a mixture of an acrylic monomer and a polymer as a resin component. 6. The artificial marble according to claim 1, wherein the inorganic filler is at least one of aluminum hydroxide and glass fiber. 7. An inorganic filler in which a silane-based surfactant having a —CF ₃ group at one end is chemically bonded to the surface in advance.
Molded artificial marble. 8. The artificial marble according to claim 7, wherein the inorganic filler is at least one of aluminum hydroxide and glass fiber. 9. A surface having a fine concavo-convex structure, containing a resin component, an inorganic filler and an antibacterial agent, and having a --CF ₃ group at one end and a chlorosilyl group or an alkoxysilyl group at the other end. Artificial marble chemically bonded with silane-based surfactant. 10. The artificial marble according to claim 9, wherein the antibacterial agent comprises at least one of an inorganic antibacterial agent and at least one of an organic antibacterial agent. 11. A fine concave-convex structure on the surface, and one end has
An artificial marble kitchen counter comprising an inorganic filler and a resin component comprising a mixture of an acrylic monomer chemically bonded to a silane-based surfactant having a CF ₃ group and a polymer thereof. 12. A fine uneven structure on the surface, and at one end-
An artificial marble bath composed of a resin component comprising a mixture of an acrylic monomer chemically bonded with a silane-based surfactant having a CF ₃ group and a polymer thereof, and an inorganic filler. 13. A fine concave-convex structure on the surface, and-
An artificial marble washing site comprising an inorganic filler and a resin component comprising a mixture of an acrylic monomer chemically bonded with a silane-based surfactant having a CF ₃ group and a polymer thereof.