JP2001089213A - Composition for artificial marble - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial marble capable of expressing perspective, deep feeling and stereoscopic feeling as pattern expression. SOLUTION: In this composition for artificial marble, which is obtained by blending additives such as a filler, a pattern material for expressing a pattern or a hardening material, plural kinds of pattern materials different in specific gravity are mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial marble composition used as a member of furniture or a building material.

[0002]

2. Description of the Related Art Conventionally, an artificial marble resin composition containing additives such as a synthetic resin, a filler, a pattern material expressing a pattern, and a curing agent is cast into a mold having a desired shape and heated. It is known to form artificial marble by curing leverage castings.

As synthetic resins used as raw materials for producing artificial marble, polyester-based, acrylic-based, vinyl-ester-based resins and the like have hitherto been used, and as these fillers, aluminum hydroxide, calcium carbonate, silica, glass, etc. Powder and the like are used, and various pattern materials expressing a pattern of artificial marble are used.

[0004] According to the expression, when the added amount of the pattern material is increased, the impact resistance is particularly lowered and the product strength is lowered.
At present, a large amount cannot be added.

[0005] Further, since the distribution of the pattern material is uneven in the thickness direction of the artificial marble, the pattern expression often becomes uneven and spotted. Also, when using only a spherical shape as the shape of the pattern material, when viewed from the surface side of the artificial marble, only the part closest to the surface of the sphere is emphasized, and the whole is blurred without a clear feeling The problem is that
When only the flat material is used as the pattern material, there is a problem that the whole is emphasized with a clear feeling and the blurred feeling disappears.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and enables the artificial marble pattern expression to have a sense of depth, depth, and three-dimensionality, and a pattern material. It is an object of the present invention to provide a composition of artificial marble that can make the distribution of the composition uniform and have an excellent appearance, and also makes the pattern expression more depth and depth by making clear and blurred feeling the same. It is an object of the present invention to provide a composition of artificial marble capable of giving a three-dimensional expression.

[0007]

Means for Solving the Problems In order to solve the above problems, the artificial marble composition according to the present invention is obtained by compounding a synthetic resin with an additive such as a filler, a pattern material expressing a pattern, a hardening material and the like. In the obtained artificial marble composition, a plurality of types of pattern materials having different specific gravities are mixed.
By producing artificial marble using the composition of artificial marble having such a configuration, pattern materials having different specific gravities in the thickness direction of the artificial marble to be formed are distributed in the thickness direction due to a specific gravity difference,
It is possible to obtain artificial marble having a sense of depth, a sense of depth, and a sense of depth.

Further, it is preferable to mix a spherical pattern material and a flat pattern material. By adopting such a configuration, it is possible to obtain an artificial marble having a sense of depth, a sense of depth, and a sense of three-dimensionality, which has a blurred feeling due to the spherical pattern material and a clear feeling due to the flat-shaped pattern material. You can do it.

Preferably, the particle size of the filler is 3 to 50 μm. Thereby, the dispersibility in the composition of the artificial marble is improved, and the impact resistance of the obtained artificial marble is improved.

It is preferable that aluminum hydroxide is used as a filler, and the amount of aluminum hydroxide is preferably 150 to 300 parts by weight based on 100 parts by weight of the resin. It can be prevented from lowering.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments.

As the synthetic resin used in the artificial marble composition of the present invention, a synthetic resin used in a usual casting method such as an acrylic resin, a polyester resin, and a vinyl ester resin is used. There is no particular limitation.

As the filler, those used in a usual casting method such as aluminum hydroxide, silica and calcium carbonate are used, but the filler used is not particularly limited.

In the embodiment described below, a compounding system using a vinyl ester resin as a synthetic resin and aluminum hydroxide as a filler will be described as an example.

As the vinyl ester resin, a bisphenol A type or a novolak type is used, but is not particularly limited. Aluminum hydroxide is blended with this vinyl ester resin as a filler.

It is preferable to use aluminum hydroxide which has been previously treated with various silane coupling agents from the viewpoint of stability of impact strength of artificial marble. Further, when the blending amount increases, the impact resistance tends to decrease. Therefore, the amount is preferably 150 to 300 parts by weight with respect to 100 parts by weight of the resin.

The particle size of the filler is 3 to 50 from both the dispersibility in the artificial marble composition and the obtained impact resistance.
μ is preferred.

The pattern material used in the present invention comprises the above synthetic resin and a filler (in the embodiment, a vinyl ester resin and aluminum hydroxide), and is further colored by adding various coloring agents. Is obtained by adding a curing agent to the mixture and heating to obtain a cured product, and then pulverizing the cured product to a desired particle size, and by changing the mixing ratio of the synthetic resin and the filler. It is possible to form a pattern material having a different specific gravity and to vary the particle size of the pattern material depending on the size to be pulverized. Here, the resin composition for obtaining the pattern material determined by the mixing ratio of the synthetic resin and the aluminum hydroxide as described above is equal to or greater than the specific gravity of the artificial marble resin composition. Also, depending on the size (particle size) of each color or pattern material,
It can be obtained by designing and manufacturing a plurality of types of pattern materials having different specific gravities.

A plurality of kinds of pattern materials having different specific gravities thus prepared are added and blended in an appropriate amount so as to meet a desired pattern expression.

Here, the casting mold is composed of an upper mold and a lower mold, and is designed such that the lower mold surface is on the surface side of the product. That is, when the composition of the artificial marble is poured into the mold and filled, and then heated and the composition is cured, the pattern material of the present invention differs in the specific gravity difference in the thickness direction of the product of the artificial marble. As a result, the larger the difference in specific gravity is (the larger the specific gravity is), the sedimentation occurs, and the powder gathers on the lower surface of the mold, that is, on the product surface side.

Therefore, as compared with the conventional structure of the pattern material having no specific gravity difference, the structure is such that the pattern material gathers on the product surface side,
The same pattern can be expressed even when the addition amount of the pattern material is approximately 1/2 or less, and since the pattern material can be expressed with a smaller amount of the pattern material than the conventional one, the addition of the material lowers the product strength. It does not extremely decrease. In addition, if the sedimentation speed is made different by giving a difference in specific gravity between the color of the pattern material and the size of the grain, their distribution occurs in the thickness direction, and a more complicated and three-dimensional pattern is expressed. Is what you can do.

Further, the shape of the pattern material, which has a specific gravity difference in the same manner, is made into a spherical shape and a flat shape, and the two types are mixed and blended, and the injected composition is three-dimensionally distributed on the surface side in the thickness direction of the product. And the blurred feeling of the spherical pattern material and the clear feeling of the flat pattern material are simultaneously expressed, and it is possible to obtain an artificial marble excellent in transparency, depth, depth and three-dimensional feeling as a whole. You can do it.

In producing artificial marble, the pattern material of the present invention is blended with a vinyl ester resin and a filler, and further, a curing agent and various additives are blended at a predetermined ratio, and the mixture is mixed and stirred by a stirrer or the like. To prepare an artificial marble composition.

The artificial marble composition thus obtained is subjected to vacuum defoaming under reduced pressure of about 3 to 50 Torr, and the defoamed artificial marble composition is placed in a mold having a predetermined shape. And at a temperature of 50-110 ° C. for 30-
Heat for 120 minutes. Here, by heating, the vinyl ester resin and the polymerizable monomer such as a styrene monomer in the composition of the artificial marble can cause a copolymerization reaction to proceed, whereby the composition of the artificial marble can be cured and molded.

The artificial marble molded by using the composition of the present invention obtained as described above has a very deep expression by rendering the pattern expression of the artificial marble clear and blurry at the same time. And a uniform marble having excellent appearance (transparency, depth, depth, three-dimensional feeling, etc.) can be obtained.

[0026]

The present invention will be described below in detail with reference to examples.

Example 1 (Prominate P-311 manufactured by Takeda Pharmaceutical Co., Ltd.) was used as a vinyl ester resin.
0 parts by weight and 200 parts by weight of aluminum hydroxide (CW-310 manufactured by Sumitomo Chemical Co., Ltd.) as a filler were mixed to obtain a resin composition A. The specific gravity of the resin composition A is ρ = 1.7.
It was 5.

Next, a curing agent (Percure W manufactured by NOF CORPORATION) is added to the colored resin composition which is composed of the same resin and filler, is mixed at different ratios, and is further added with various coloring agents.
O) was added at an appropriate amount and heated at 90 ° C. for 60 minutes to obtain a cured product. Thereafter, five types of spherical pattern materials having different specific gravities (pattern material B, Pattern material C, pattern material D, pattern material E, pattern material F) were obtained. The specific gravity of the obtained pattern material is ρ = 1.85 for pattern material B and ρ = 1.9 for pattern material C, respectively.
0, pattern material D was ρ = 1.95, pattern material E was ρ = 2.00, and pattern material F was ρ = 2.05.

Next, with respect to 100 parts by weight of the resin composition A, each pattern material was prepared by mixing the pattern material B = 2 parts by weight and the pattern material C = 1.
Parts by weight, pattern material D = 5 parts by weight, pattern material E = 8 parts by weight, pattern material F
= 3 parts by weight.

Further, an appropriate amount of a hardening agent (Percure WO manufactured by NOF Corporation) was added to obtain a composition of artificial marble.

The artificial marble composition thus obtained was subjected to vacuum defoaming treatment under reduced pressure of 25 Torr for 30 minutes.
into a mold for molding a flat plate having a thickness of
The artificial marble composition was cured by heating at 0 ° C. for 60 minutes to obtain an artificial marble having excellent transparency with a sense of transparency and depth.

Example 2 10 (Prominate P-310 manufactured by Takeda Pharmaceutical Co., Ltd.) was used as a vinyl ester resin.
0 parts by weight and 200 parts by weight of aluminum hydroxide (CW-308B manufactured by Sumitomo Chemical Co., Ltd.) as a filler were blended to obtain a resin composition G. The specific gravity of this resin composition G is ρ = 1.
76.

Next, the pattern material of Example 1 was added to the resin composition G by 4 parts by weight of the pattern material B, 2 parts by weight of the pattern material C, 10 parts by weight of the pattern material D and 16 parts by weight of the pattern material E. Parts by weight, pattern material F = 10
Parts by weight were blended.

Further, an appropriate amount of a hardening agent (Percure WO manufactured by NOF Corporation) was added to obtain a composition of artificial marble.

The artificial marble composition thus obtained was subjected to a vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes.
into a mold for molding a flat plate having a thickness of
The artificial marble composition was cured by heating at 0 ° C. for 60 minutes to obtain an artificial marble having excellent transparency with a sense of transparency and depth.

(Example 3) As a vinyl ester resin (Prominate P-311 manufactured by Takeda Pharmaceutical Co., Ltd.), 10
0 parts by weight and 200 parts by weight of aluminum hydroxide (CW-325J manufactured by Sumitomo Chemical Co., Ltd.) as a filler were blended to obtain a resin composition H. The specific gravity of this resin composition H is ρ = 1.
76.

Next, a curing agent (Percure H manufactured by NOF Corporation) was added to the colored resin composition, which was composed of the same resin and filler, was mixed at a different mixing ratio, and was further added with various coloring agents.
O) was added thereto and heated at 90 ° C. for 60 minutes to obtain a cured product. Thereafter, three types of spherical pattern materials having different specific gravities (pattern materials I, Pattern material J, pattern material K) and two types of flat pattern materials (pattern material L, pattern material M) were obtained. The specific gravity of the obtained pattern material is ρ =
1.86, pattern material J is ρ = 1.91, pattern material K is ρ = 1.9
7, pattern material L was ρ = 2.03, and pattern material M was ρ = 2.08.

Next, with respect to 100 parts by weight of the resin composition H, each pattern material was prepared by adding the pattern material I = 1 part by weight and the pattern material J = 3.
Parts by weight, pattern material K = 7 parts by weight, pattern material L = 8 parts by weight, pattern material M
= 5 parts by weight.

Further, an appropriate amount of a curing agent (Percure WO manufactured by NOF Corporation) was added to obtain an artificial marble composition.

The artificial marble composition thus obtained was subjected to a vacuum degassing treatment under a reduced pressure of 25 Torr for 30 minutes.
into a mold for molding a flat plate having a thickness of
The artificial marble composition was cured by heating at 0 ° C. for 60 minutes to obtain an artificial marble having excellent transparency with a sense of transparency and depth.

Example 4 As a vinyl ester resin, 100 g of Lipoxy R-804 manufactured by Showa High Polymer Co., Ltd. was used.
Parts by weight, silica as filler (MI manufactured by Shiroishi Kogyo Co., Ltd.)
LLISIL M10) was blended in an amount of 200 parts by weight to obtain a resin composition N. The specific gravity of this resin composition N is ρ = 1.56.
Met.

Next, a curing agent (Percure H manufactured by Nippon Oil & Fats Co., Ltd.) was added to the colored resin composition, which was composed of the same resin and filler, and was mixed at different mixing ratios and further added various colorants.
O) and heated at 90 ° C. for 60 minutes to obtain a cured product. Thereafter, two types of spherical pattern materials (pattern materials O, Pattern material P)
And three types of flat pattern materials (pattern material Q, pattern material R, pattern material S)
I got The specific gravity of the obtained pattern material is ρ =
1.60, pattern material P is ρ = 1.65, pattern material Q is ρ = 1.6.
8, the pattern material R was ρ = 1,72, and the pattern material S was ρ = 1.79.

Next, with respect to 100 parts by weight of the resin composition N, each pattern material was prepared by adding a pattern material O = 2 parts by weight and a pattern material P = 3 parts by weight.
Parts by weight, pattern material Q = 9 parts by weight, pattern material R = 10 parts by weight, and pattern material S = 8 parts by weight were blended.

Further, an appropriate amount of a curing agent (Percure WO manufactured by NOF CORPORATION) was added to obtain a composition of artificial marble.

The artificial marble composition thus obtained was subjected to a vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes.
into a mold for molding a flat plate having a thickness of
The artificial marble composition was cured by heating at 0 ° C. for 60 minutes to obtain an artificial marble having excellent transparency with a sense of transparency and depth.

Example 5 (Acrylic Syrup AC-102 manufactured by Nippon Fellow Co., Ltd.) was used as an acrylic resin.
The resin composition T was obtained by mixing 200 parts by weight and 210 parts by weight of glass powder (M-80S manufactured by Nippon Fellow Co., Ltd.) as a filler. The specific gravity of this resin composition T is ρ = 1.5
It was 8.

Next, a curing agent (Percure H manufactured by NOF Corporation) was added to the colored resin composition, which was composed of the same resin and filler, and was changed in the mixing ratio and further added various colorants.
O) was added thereto and heated at 90 ° C. for 60 minutes to obtain a cured product. Thereafter, three types of spherical pattern materials (pattern materials U, Pattern material V, pattern material W) and five kinds of flat pattern materials (pattern material X, pattern material U ',
A pattern material V ′, a pattern material W ′, and a pattern material Y) were obtained. The specific gravities of the obtained pattern materials are respectively ρ = 1.61 for the pattern material X, ρ = 1.65 for the pattern material U and the pattern material U ′, and ρ = 1.6 for the pattern material V and the pattern material V ′.
7, pattern material W, pattern material W 'is ρ = 1.73, pattern material Y is ρ =
1,78.

Next, with respect to 100 parts by weight of the resin composition T, each pattern material was prepared by mixing the pattern material U = 2 parts by weight and the pattern material V = 3.
Parts by weight, pattern material W = 4 parts by weight, pattern material X = 1 part by weight, pattern material U ′ = 5 parts by weight, pattern material V ′ = 2 parts by weight, pattern material W ′ = 3 parts by weight, pattern material X = 3 parts by weight were blended.

Further, an appropriate amount of a hardening agent (Percure WO manufactured by NOF Corporation) was added to obtain a composition of artificial marble.

The artificial marble composition thus obtained was subjected to a vacuum degassing treatment under a reduced pressure of 25 Torr for 30 minutes.
into a mold for molding a flat plate having a thickness of
The artificial marble composition was cured by heating at 0 ° C. for 60 minutes to obtain an artificial marble having excellent transparency with a sense of transparency and depth.

[0051]

As described above, in the present invention, there are a plurality of artificial marble compositions obtained by blending a synthetic resin with additives such as a filler and a pattern material expressing a pattern and a hardening material. Pattern materials with different specific gravities are mixed, so that the pattern materials with different specific gravities are distributed in the thickness direction due to the difference in specific gravity in the thickness direction of the artificial marble to be formed, and an artificial marble with a sense of depth, depth, and three-dimensionality is obtained. Can be done.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, a spherical pattern material and a flat pattern material are mixed, so that the spherical pattern material is formed. It is possible to obtain an artificial marble having a more sense of depth, depth, and three-dimensionality, having both the blurred feeling of the pattern material and the crispness of the flat pattern material.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, the filler has a particle size of 3 to 50 μm. And the impact resistance of the resulting artificial marble is improved.

According to the fourth aspect of the present invention, in addition to the effects of the first or third aspect, aluminum hydroxide is used as a filler, and 150 to 30 parts by weight
Since it is 0 parts by weight, the impact resistance of the resulting artificial marble can be prevented from lowering.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C04B 20:00) C04B 20:00) B 111: 54 111: 54 (72) Inventor Yoshiaki Tahara Kitakyushu, Fukuoka Prefecture Inside Kitakyushu Matsushita Electric Works Co., Ltd., 1-18, Yasuse, Wakamatsu-ku, Yokohama-shi (72) Inventor Shinji Yamaguchi 18 Kitakyushu Matsushita Electric Works, 1-chome, Wakamatsu-ku, Fukuoka, Japan

Claims (4)

[Claims] 1. A pattern material for expressing a filler and a pattern in a synthetic resin,
An artificial marble composition obtained by mixing an additive such as a hardening material, wherein a plurality of types of pattern materials having different specific gravities are mixed. 2. The artificial marble composition according to claim 1, wherein a spherical pattern material and a flat pattern material are mixed. 3. The artificial marble composition according to claim 1, wherein the filler has a particle size of 3 to 50 μm. 4. The artificial product according to claim 1, wherein aluminum hydroxide is used as a filler, and the amount of aluminum hydroxide is 150 to 300 parts by weight based on 100 parts by weight of the resin. Marble composition.