JP3225180B2 - Stone-grain artificial marble - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial marble having a stone-grain tone.

[0002]

2. Description of the Related Art Artificial marble has the characteristics of being lighter and more nonporous than natural marble, and has an excellent texture, superior strength, and good weather resistance that is comparable to natural marble. In recent years, because of the fact that construction and processing are easier than natural marble,
Vanity table, bathtub, table, wall material, floor material, furniture,
It has been used for many uses such as interior accessories and seals.

[0003] As materials of artificial marble, for example, melamine decorative board, gel coat artificial marble, acrylic artificial marble, polyester artificial marble and the like are known. Among these artificial marbles, melamine decorative board and gel coat artificial marble have drawbacks such that partial repair and post-processing are difficult because the surface-only patterning process is performed, and the strength is insufficient. . On the other hand, acrylic artificial marble and polyester artificial marble have texture and strength peculiar to solid materials, and acrylic artificial marble has excellent workability and weather resistance.

[0004] As a technique related to stone-grain artificial marble,
For example, crushed stone such as quartz, glass, marble, mica, or AB
It is known that a resin pulverized material such as S resin, epoxy resin, melamine resin, phenol resin and the like is dispersed in the resin to produce a stone texture (Japanese Patent Publication No. 61-24357).

[0005]

A conventional stone-grain artificial marble has a particle size of 10 to produce a stone-grain tone.
Although a small particle size of about 0 to 800 μm was used,
In recent years, in order to obtain an appearance closer to natural marble, 10
Particles using particles having a large particle size of about 0 to 5000 μm are spreading.

However, the stone-grain artificial marble has a strength higher than that of a single-pattern artificial marble having no particle pattern because particles for expressing the stone-grain are dispersed inside. However, there is a disadvantage that the impact resistance and the thermal crack resistance are slightly inferior, and this disadvantage becomes more remarkable as the particle size of the dispersed particles increases. In other words, artificial marble in which particles having a large particle size are dispersed in order to obtain an appearance closer to natural marble tends to have further deteriorated physical properties as compared with conventional artificial marble in which particles having a small particle size are dispersed. For example, in an application under an environment where temperature changes sharply, such as a kitchen top plate, crack defects are likely to occur with a decrease in heat crack resistance.

The reason why the physical properties of the stone-grain artificial marble are poor is the lack of interfacial adhesive strength between the particles for expressing the stone-grain and the peripheral portion thereof. In addition, since there is a large difference in the physical properties of the substances constituting the particles for expressing the stone tone and the peripheral part, specificity is generated in the part, and distortion is likely to occur in the peripheral part of the particle. is there.

An object of the present invention is to provide a stone-grained artificial marble having improved properties of interfacial adhesion between particles for expressing a stone-grain and its peripheral portion, and particularly having excellent heat crack resistance. Is to do.

[0009]

The above object is achieved by the present invention having the following constitution. That is, the present invention provides components (A) and (B) satisfying the following conditions:
It is a stone-grain artificial marble obtained by polymerizing a composition having a total of 100 parts by weight of the component (C) and the component (D). (1) Component (A) comprising methyl methacrylate, a mixture of methyl methacrylate as a main component and another vinyl monomer having one vinyl group in a molecule, or a partially polymer syrup thereof. ··· 20 to 50 parts by weight, (2) Component (B) consisting of a crosslinkable vinyl monomer having two or more vinyl groups in the molecule.
(1) at least one selected from aluminum hydroxide, magnesium hydroxide, calcium carbonate, and silica;
(C) component composed of various inorganic fillers, (4) The total of the component (A ′), the component (B ′), the component (C ′), and the component (E ′) satisfying the following conditions is 100% by weight. Of a polymer obtained by polymerizing a composition consisting of 1 part by weight, a particle size of 0.1 to 5.0 mm, and an average particle size of 0.24 to 2.8 m.
m, swelling degree: 1.5 to 2.5 (D) Component of pulverized particles: 3 to 25 parts by weight, 1) methyl methacrylate, methyl methacrylate as a main component and one in other molecules (A ') component consisting of a mixture with a vinyl monomer having a vinyl group of the above or a partially polymer syrup thereof ... 20 to 50 parts by weight, 2) having two or more vinyl groups in the molecule Component (B ′) composed of a crosslinkable vinyl monomer: 0.05 to 0.5% by weight based on component (A ′) 3) Aluminum hydroxide, magnesium hydroxide, calcium carbonate, and silica At least one selected from
(C ') component composed of various inorganic fillers, 4) (E') component composed of a coloring pigment ... 0.05 to 5
(5) The total amount of the component (C) composed of the inorganic filler and the component (C ′) composed of the inorganic filler in the component (D)... 3
0 to 70 parts by weight.

[0010] In the stone-grain artificial marble having the above structure, when a coloring pigment is blended in addition to the component (D) composed of pulverized particles, the components (A), (B), (C), It is preferable to add 0.05 to 5.0 parts by weight of the coloring pigment to 100 parts by weight of the total of the components (D) and (D).

The resin component in the stone-grain artificial marble of the present invention is a polymer of methyl methacrylate or a methyl methacrylate as a main component and another vinyl monomer having one vinyl group in a molecule. The copolymer is obtained by copolymerizing a crosslinkable comonomer with a copolymer. By using a resin component obtained by copolymerizing a crosslinkable comonomer, the strength and stain resistance of the artificial marble can be improved. Getting worse.

[0012] For this reason, as the resin component comprising the component (A) and the component (B) used in addition to the component (D),
With respect to 100 parts by weight of the total amount of methyl methacrylate and other vinyl monomers having one vinyl group in the molecule, that is, 100 parts by weight of the component (A), a crosslinkable comonomer was used. Use is made of a mixture of the component (B) at a ratio of 0.1 to 10.0% by weight.

[0013] The crosslinkable comonomer is a vinyl monomer having two or more vinyl groups in the molecule. Examples thereof include (meth) acrylic acid such as ethylene glycol dimethacrylate and trimethylolpropane trimethacrylate. Esters and compounds having a plurality of polymerizable double bonds in the molecule are used.

The inorganic filler (C) in the stone-grain artificial marble of the present invention is at least one selected from aluminum hydroxide, magnesium hydroxide, calcium carbonate, and silica, and most preferably water. Aluminum oxide is used. The surface of the inorganic filler may be treated with, for example, a silane coupling agent, a titanate coupling agent, or stearic acid.

The inorganic filler used as the component (C) is
If the particle size is too large, the physical properties of the artificial marble will be reduced, and if it is too small, the light transmission of the artificial marble will be reduced. Therefore, those having a particle size of about 1 to 150 μm and an average particle size of about 10 to 100 μm are used. Is good.

If the amount of the inorganic filler is too large, the physical properties of the artificial marble will be reduced, and if it is too small, the texture of the artificial marble will be impaired. Therefore, the inorganic filler is the component (A),
The component (B), the component (C) and the component (D) are used in an amount of 30 to 70% by weight, more preferably 35 to 65% by weight, based on the total amount of the components.

The coloring pigment in the stone-grain artificial marble of the present invention includes, for example, titanium white, zinc white, lead white, carbon black, red iron oxide, vermilion, cadmium red, yellow lead, ultramarine, cobalt blue, cobalt purple and the like. And organic pigments such as azo, triphenylmethane, quinoline, anthraquinone, and phthalocyanine can be used.

If the amount of the coloring pigment is too large, the light transmittance of the artificial marble decreases, and a deep appearance cannot be obtained. Therefore, the components (A), (B), (C), and ( It is preferable to use 0.05 to 5 parts by weight of the coloring pigment based on 100 parts by weight of the total of component D).

The stone-grain artificial marble of the present invention comprises, as necessary, a component (C) comprising an inorganic filler and a component (D) comprising crushed particles in a resin component comprising the components (A) and (B). After uniformly dispersing the coloring pigment to be added, the mixture is polymerized and solidified. As a polymerization method at this time, redox polymerization, heat polymerization to which a heat-reactive polymerization initiator is added, or the like can be used.

The artificial marble containing the pulverized particles for producing the grain tone can obtain a clear grain tone of high commercial value by grinding its surface. The surface is preferably ground to a depth of at least half the maximum particle size of the pulverized particles.

As described above, the resin component in the component (D) composed of the pulverized particles for producing a stone-like tone is also composed of methyl methacrylate or methyl methacrylate as a main component and one vinyl compound per molecule. It is obtained by copolymerizing a copolymer with a vinyl monomer having a group and a crosslinkable comonomer.

By forming a resin component obtained by copolymerizing a crosslinkable comonomer, the strength and stain resistance of the pulverized particles can be improved, but when a large amount of the crosslinkable comonomer is copolymerized. The processability of the pulverized particles deteriorates, and the desired degree of swelling cannot be obtained, so the total amount of methyl methacrylate and other vinyl monomers having one vinyl group in the molecule is 100 parts by weight. That is, with respect to 100 parts by weight of the component (A '), the component (B'), which is a crosslinkable comonomer, is added in an amount of 0.
What is blended at a ratio of 0.5 to 0.5% by weight is used.

The crosslinkable comonomer constituting the component (B ′) is
(B) The same monomer as described as the crosslinkable comonomer as the component, that is, a vinyl monomer having two or more vinyl groups in the molecule, such as ethylene glycol dimethacrylate and trimethacryl It is a (meth) acrylate such as trimethylolpropane acid or a compound having a plurality of polymerizable double bonds in a molecule.

As the inorganic filler as the component (C '), the same inorganic filler as that described as the component (C) is used.

It is necessary that the pulverized particles (D) for producing the stone tone are colored, and the coloring pigment is the same as that described above as the coloring pigment in the artificial marble. Can be used. In addition, the pigment for coloring is 0.05% in all the components of the pulverized particles (D).
-5% by weight.

Further, as the pulverized particles as the component (D) for producing a stone grain tone, when the pulverized particles are immersed in the component (A) of the composition for artificial marble to be used for one day and night, Use a material that swells by 0.5 to 2.5 times.
If the degree of swelling of the pulverized particles at this time is less than 1.5 times, artificial marble having good heat crack resistance cannot be obtained.
If it exceeds 5 times, the crushed particles are deformed during the formation of artificial marble, and a clear stone-grained appearance cannot be obtained.

If the particle size of the pulverized particles, which is the component (D) for producing the stone tone, is too large, the physical properties of the artificial marble will be reduced, and if it is too small, a material having the appearance of natural stone will be obtained. Disappears. Therefore, the particle size is substantially 0.1 mm.
The following particles do not contain a particle size of 0.1 to 5.0 mm, preferably a particle size of 0.6 to 5.0 mm, and an average particle size of 0.24 to 2.
8 mm crushed particles are used.

The pulverized particles, which are the component (D) for producing the stone tone, include the component (C ') composed of an inorganic filler in the resin component composed of the component (A') and the component (B '). It is obtained by uniformly dispersing the component (E ') comprising a coloring pigment, polymerizing and solidifying, and further pulverizing the solidified product. The polymerization method at this time, redox polymerization,
Alternatively, heat polymerization to which a heat-reactive polymerization initiator is added can be used.

Polymerization for obtaining the stone-grain artificial marble of the present invention, or polymerization for obtaining pulverized particles as the component (D) for producing the stone-grain, ie, polymerization of methyl methacrylate or methacrylic acid Redox polymerization of polymerization containing methyl as a main component is a combination of an acyl peroxide such as benzoyl peroxide and an amine compound such as N, N-dimethylaniline, N, N-diethylaniline, N, N-dimethylparaidine. Or a combination of a peroxyl compound such as tertiary butyl peroxymaleic acid and a mercaptan compound such as glycol dimercaptoacetate.

When polymerizing the polymerizable raw material,
By using the prepolymerized syrup, (1) the viscosity of the polymerizable raw material syrup can be controlled when adding the pulverized particles and / or the inorganic filler to the polymerizable raw material. The control can prevent the additives from settling out, and (2) the curing time of the polymerizable raw material is shortened, so that the productivity is increased.

The syrup obtained by prepolymerizing the polymerizable raw material is
A method of polymerizing methyl methacrylate monomer and stopping the polymerization in the middle, or a polymer containing methyl methacrylate as a main component previously polymerized by bulk polymerization or suspension polymerization, a monomer of methyl methacrylate Obtained by dissolving in water.

The stone-grain artificial marble of the present invention or the pulverized particles used as the component (D) include, in addition to the above components, for example, an ultraviolet absorber, a flame retardant, an antibacterial agent, a mold release agent, a fluidizing agent. Agents, thickeners and the like can be appropriately compounded.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete structure of the stone-grain artificial marble of the present invention will be described below based on production examples. "%" In the description
Means% by weight. The bending rupture test used for evaluating the obtained artificial marble was measured according to JIS-6911.

In the heat crack resistance test, a sample was prepared by cutting out a 400 mm square artificial marble sheet central portion by a high-speed router into a 100 mm square with R = 10 mm at the corner, and infrared rays were sampled from above the sample. By irradiating the lamp, the sample was heated to 90 ° C. for 30 minutes.
After heating at 90 ° C. for 30 minutes, the infrared lamp was turned off, and left for 120 minutes to cool down to room temperature. It was measured by the number of temperature cycles. When the result of the heat crack resistance test by this test method is 20 cycles or more, the battery has practically sufficient durability.

Example 1 Production of ground particles as component (D) 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder "Japan Light Metal Co., Ltd .: The same applies to (trade name: BS-33) 6
200 g and tertiary butyl peroxymaleic acid "Nippon Yushi Co., Ltd .: (trade name: Perbutyl MA-25)
The same applies to the following, 80 g, and ethylene glycol dimethacrylate "Mitsubishi Rayon Co., Ltd .: (trade name: Acryester E
D) The same applies hereinafter) (4 g) and 50 g of a black paste as a coloring pigment were mixed and stirred by a mixer.

After defoaming the obtained mixed slurry in a vacuum vessel, 12 g of glycol dimercaptoacetate “Yodo Chemical Co., Ltd .: (trade name: GDMA) the same applies hereinafter”,
After adding and stirring 8 g of deionized water, a polyvinyl alcohol film (hereinafter, referred to as a PVA film) is poured into a formwork of about 60 cm square on which the PVA film is laid, and a PVA film is stuck thereon, and the whole is heated with urethane. It was left in a box for 30 minutes to obtain a sheet-like cured product.

Subsequently, the sheet-shaped cured product was roughly pulverized with a hammer, further finely pulverized with a stamp mill, and then separated by a sieve to obtain a particle size of 600 to 2700 μm and an average particle size of 1000.
As a result, pulverized particles (1) of μm were obtained.

The pulverized particles (1) are introduced into a 100 cc measuring cylinder up to 50 cc while gently vibrating, and methyl methacrylate is further filled with 100 cc scale of the measuring cylinder.
After pouring the lid to the position and leaving it for 24 hours, the volume of the pulverized particles was confirmed to be 84 cc, and the degree of swelling of the pulverized particles (1) was 1.68.

Molding of stone-grain artificial marble 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 47
00g and tertiary butyl peroxymaleic acid 8
0 g, 42 g of ethylene glycol dimethacrylate,
The above ground particles (1) (1500 g) were mixed and stirred with a mixer.

After defoaming the obtained mixed slurry in a vacuum vessel, 12 g of glycol dimercaptoacetate was further added.
And 8 g of deionized water and agitated slurry,
The PVA film is poured into a mold frame of about 60 cm square on which the PVA film is laid, the PVA film is stuck thereon, and the whole is left in a urethane insulated box for 30 minutes, so that the pulverized particles (1) are uniformly dispersed on the entire surface. To obtain a cured sheet.

Next, the surface of the sheet-shaped cured product is
Grind to a depth of 2 mm or more with a woodworking planar
By polishing sequentially with a # 400, # 600, and # 600 sandpaper, a natural stone-like artificial marble having a clearness of about 600 mm x 600 mm x 13 mm and high commercial value was obtained.

The results of the bending test of the bending test chip cut from the artificial marble were as follows: elongation at break: 0.95%, strength at break: 642 kgf / cm ² , modulus of elasticity: 7.7 × 10 ⁴ kg
f / cm ² . In a heat crack resistance test of a sample cut from the artificial marble, no crack was generated even after the completion of 20 cycles.

Example 2 Production of ground particles as component (D) 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 62
00g and tertiary butyl peroxymaleic acid 8
0 g, 9 g of ethylene glycol dimethacrylate, and 50 g of a black paste as a coloring pigment were mixed and stirred with a mixer.

The obtained mixed slurry was used and treated in the same manner as in the corresponding step of Example 1 to obtain a particle diameter of 600 to 27.
Pulverized particles (2) having a size of 00 μm and an average particle size of 1000 μm were obtained. The crushed particles (2) are charged to 50 cc while slightly vibrating in a 100 cc measuring cylinder, and further, methyl methacrylate is poured to a position of 100 cc of the measuring cylinder, covered, covered, and allowed to stand for 24 hours. It was confirmed that it was 76 cc, and the swelling degree of the pulverized particles (2) was 1.52.

Molding of stone-grain artificial marble 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 47
00g and tertiary butyl peroxymaleic acid 8
0 g, 42 g of ethylene glycol dimethacrylate,
1500 g of the above-mentioned crushed particles (2) were mixed and stirred with a mixer.

The obtained mixed slurry is treated in the same manner as in the corresponding step of Example 1 to obtain a slurry of about 600 mm × 600 m
A natural stone-like artificial marble of high commercial value with a clear of mx 13 mm was obtained.

The results of the bending test of the bending test chip cut from the artificial marble showed that the breaking elongation was 0.94%, the breaking strength was 624 kgf / cm ² , and the elastic modulus was 7.6 × 10 ⁴ kg.
f / cm ² . Further, in the heat crack resistance test of the material cut from the artificial marble, no crack was generated even after the completion of 20 cycles.

Comparative Example 1 Production of Ground Particles 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 62
00g and tertiary butyl peroxymaleic acid 8
0 g and ethylene glycol dimethacrylate 110 g
And 50 g of a black paste as a coloring pigment,
Stir with a mixer.

The obtained mixed slurry was treated in the same manner as in the corresponding step of Example 1 to obtain a particle diameter of 600 to 2700 μm.
m, and pulverized particles (3) having an average particle diameter of 1000 μm were obtained. Pulverized particles (3) are poured into a 100 cc measuring cylinder up to 50 cc while slightly vibrating. Further, methyl methacrylate is poured into the measuring cylinder at a position of 100 cc, covered, covered, and allowed to stand for 24 hours. It was confirmed that it was 60 cc, and the swelling degree of the pulverized particles (3) was 1.20.

Molding of artificial marble 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 47
00g and tertiary butyl peroxymaleic acid 8
0 g, 42 g of ethylene glycol dimethacrylate,
1500 g of the above-mentioned pulverized particles (3) were mixed and stirred with a mixer.

The obtained mixed slurry is treated in the same manner as in the corresponding step of Example 1 to obtain a slurry of about 600 mm × 600 m
An artificial marble of mx 13 mm was obtained.

The results of the bending test of the bending test chip cut from the artificial marble showed that the breaking elongation was 0.82%, the breaking strength was 555 kgf / cm ² , and the elastic modulus was 7.4 × 10 ⁴ kg.
f / cm ² . Further, in the heat crack resistance test of the material cut out from the artificial marble, cracks occurred in 15 cycles.

Comparative Example 2 Preparation of Ground Particles 3658 g of methyl methacrylate syrup comprising a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 62
00g and tertiary butyl peroxymaleic acid 8
0 g, 1 g of ethylene glycol dimethacrylate, and 50 g of a black paste as a coloring pigment were mixed and stirred with a mixer.

The mixed slurry thus obtained was treated in the same manner as in the corresponding step of Example 1 to obtain a particle size of 600 to 27.
Pulverized particles (4) having a size of 00 μm and an average particle size of 1000 μm were obtained. The crushed particles (4) were put into a 100 cc graduated cylinder while slightly vibrating to 50 cc, and methyl methacrylate was further poured into the graduated cylinder at a position of 100 cc, covered, and allowed to stand for 24 hours. Had a deformation due to the dissolution of the crushed particles.

Molding of artificial marble 3658 g of methyl methacrylate syrup consisting of a mixture of 20% by weight of polymethyl methacrylate and 80% by weight of methyl methacrylate, and aluminum hydroxide powder 47
00g and tertiary butyl peroxymaleic acid 8
0 g, 42 g of ethylene glycol dimethacrylate,
When 1500 g of the above-mentioned pulverized particles (4) were mixed and stirred with a mixer, stirring became difficult due to an increase in viscosity.

After degassing the high-viscosity slurry in a vacuum container, 12 g of glycol dimercaptoacetate and 8 g of deionized water were added and stirred.
The VA film was poured into a mold frame of about 60 cm square laid thereon, a PVA film was stuck thereon, and the whole was left in a urethane insulated box for 30 minutes to obtain a sheet-like cured product.

Next, the surface of the sheet-shaped cured product is
Grind to a depth of 2 mm or more with a woodworking planar
No. 400, No. 600, and No. 600 sandpapers were sequentially polished. However, the appearance of the grain was blurred because the pulverized particles (4) that were to express the grain were deformed by melting.

[0058]

The stone-grain artificial marble of the present invention has a high interfacial adhesion between particles for expressing the stone-grain and its peripheral portion. For this reason, it becomes an artificial marble having properties particularly excellent in heat-resistant cracking properties, and also has a clear stone tone, and has high commercial value.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI C04B 14:36 C04B 14:36 14:28 14:28 14:04 14:04 Z 16:04) 16:04) 111: 54 111: 54 (56) References JP-A-6-263500 (JP, A) JP-A-7-109160 (JP, A) JP-A-3-28148 (JP, A) JP-A-5-32720 (JP, A) A) JP-A-5-330884 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C04B 2/00-28/36

Claims (2)

(57) [Claims] A component (A) satisfying the following conditions:
The sum of the components (B), (C) and (D) is 10
A stone-grain artificial marble characterized by being polymerized from a composition comprising 0 parts by weight. (1) Component (A) comprising methyl methacrylate, a mixture of methyl methacrylate as a main component and another vinyl monomer having one vinyl group in a molecule, or a partially polymer syrup thereof. ··· 20 to 50 parts by weight, (2) Component (B) consisting of a crosslinkable vinyl monomer having two or more vinyl groups in the molecule.
(1) at least one selected from aluminum hydroxide, magnesium hydroxide, calcium carbonate, and silica;
(C) component composed of various inorganic fillers, (4) The total of the component (A ′), the component (B ′), the component (C ′), and the component (E ′) satisfying the following conditions is 100% by weight. Of a polymer obtained by polymerizing a composition consisting of 1 part by weight, a particle size of 0.1 to 5.0 mm, and an average particle size of 0.24 to 2.8 m.
m, swelling degree: 1.5 to 2.5 (D) Component of pulverized particles: 3 to 25 parts by weight, 1) methyl methacrylate, methyl methacrylate as a main component and one in other molecules (A ') component consisting of a mixture with a vinyl monomer having a vinyl group of the above or a partially polymer syrup thereof ... 20 to 50 parts by weight, 2) having two or more vinyl groups in the molecule Component (B ′) composed of a crosslinkable vinyl monomer: 0.05 to 0.5% by weight based on component (A ′) 3) Aluminum hydroxide, magnesium hydroxide, calcium carbonate, and silica At least one selected from
(C ') component composed of various inorganic fillers, 4) (E') component composed of a coloring pigment ... 0.05 to 5
(5) The total amount of the component (C) composed of the inorganic filler and the component (C ′) composed of the inorganic filler in the component (D)... 3
0 to 70 parts by weight. 2. A coloring pigment of 0.05 with respect to a total of 100 parts by weight of the component (A), the component (B), the component (C) and the component (D), which satisfies the condition described in claim 1. ~ 5
A stone-grain artificial marble characterized by being obtained by polymerizing a composition containing parts by weight.