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JP4524817B2 - Artificial marble composition - Google Patents

Artificial marble composition Download PDF

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Publication number
JP4524817B2
JP4524817B2 JP24046999A JP24046999A JP4524817B2 JP 4524817 B2 JP4524817 B2 JP 4524817B2 JP 24046999 A JP24046999 A JP 24046999A JP 24046999 A JP24046999 A JP 24046999A JP 4524817 B2 JP4524817 B2 JP 4524817B2
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JP
Japan
Prior art keywords
artificial marble
aluminum hydroxide
composition
silica
filler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP24046999A
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Japanese (ja)
Other versions
JP2001064060A (en
Inventor
清美 田川
勝亮 木本
慶昭 田原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Electric Works Co Ltd
Original Assignee
Panasonic Corp
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp, Matsushita Electric Works Ltd filed Critical Panasonic Corp
Priority to JP24046999A priority Critical patent/JP4524817B2/en
Publication of JP2001064060A publication Critical patent/JP2001064060A/en
Application granted granted Critical
Publication of JP4524817B2 publication Critical patent/JP4524817B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Macromonomer-Based Addition Polymer (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、家具の部材や建材として用いられる人造大理石の組成物に関するものである。
【0002】
【従来の技術】
従来から合成樹脂に充填剤と硬化剤などの添加物を配合して得られる人造大理石の組成物が知られている。この人造大理石の組成物は所望の形状を有した金型に注型し、加熱してこの注型物を硬化させることにより人造大理石を形成している。
【0003】
人造大理石を製造するための原料となる合成樹脂としては、従来よりポリエステル系、アクリル系、ビニルエステル系などが用いられている。また、充填剤としては、シリカ系、炭酸カルシウム、水酸化アルミニウム、ガラスパウダー、クレーなどが用いられるが、従来にあってはそれぞれ単独系で配合されている。
【0004】
通常、充填剤としてシリカあるいはガラスパウダーを単独で用いた場合は充填剤自体が硬いため得られる人造大理石の製品強度は高いが切削加工性が悪く、一方、水酸化アルミニウムを単独で用いた場合は充填剤自体がシリカやガラスパウダーに比べて柔らかくて、切削加工性は良くなるが、製品強度が低下してしまうという問題があった。そのため、水酸化アルミニウムを充填剤として単独で用いた場合には人造大理石の裏面に合板等の補強板を貼り付けて製品化する必要があった。
【0005】
また、合成樹脂としてビニルエステル系樹脂を用いた場合、充填剤として水酸化アルミニウムを用いると、ビニルエステル系樹脂と水酸化アルミニウムの光の屈折率が近すぎて製品の透明感が高すぎ、裏面の補強板が表面部で透けて見えることになり、隠蔽性の強い着色剤を添加してその現象を防止する必要があった。
【0006】
【発明が解決しようとする課題】
本発明は上記の点に鑑みてなされたものであり、人造大理石の切削加工性を低下させることなく製品強度を上げ、且つ、透明感を着色剤なしでコントロールして、外観性、強度(靱性)、硬度の優れた人造大理石を得ることができる人造大理石の組成物を提供することを課題とするものである。
【0007】
【課題を解決するための手段】
上記課題を解決するために本発明に係る人造大理石の組成物は、ビニルエステル樹脂に充填剤と硬化剤などの添加物を配合して注型成形により得られる人造大理石の組成物において、充填剤として、水酸化アルミニウムに加え、シリカ、ガラスパウダーのうちの少なくとも一つ以上を用い、上記水酸化アルミニウムに対するシリカあるいはガラスパウダーの配合割合を水酸化アルミニウム100重量部に対して5〜50重量部としたことを特徴とするものである。このようにビニルエステル樹脂に2種類以上の充填剤を組み合わせた組成物を用いて人造大理石を製造することで、好適な切削加工性を有し且つ製品強度の高い人造大理石を得ることができることになる。
【0009】
また、充填剤がシランカップリング剤で処理されていることが好ましい。このような構成とすることで、衝撃強度安定性に優れた人造大理石を得ることができるものである。
【0010】
【発明の実施の形態】
以下、本発明を実施形態に基づいて説明する。
【0011】
本発明における人造大理石の組成物に使用する合成樹脂としては、ビニルエステル樹脂を使用する。
【0012】
ビニルエステル樹脂はビスフェノールA型やノボラック型などのものがあるが、特に限定されるものではない。人造大理石の組成物はこれらのビニルエステル樹脂と充填剤と硬化剤などの添加物を混合・配合して得られる。
【0013】
本発明においては充填剤として水酸化アルミニウムに加え、シリカ、ガラスパウダーのうちの少なくとも一つ以上を用いることを特徴としている。すなわち、充填剤として水酸化アルミニウムとシリカを用いる場合、又は、充填剤として水酸化アルミニウムとガラスパウダーを用いる場合、又は充填剤として水酸化アルミニウムとシリカとガラスパウダーを用いる場合がある。このように、水酸化アルミニウムとシリカあるいはガラスパウダー、又は水酸化アルミニウムとシリカとガラスパウダーとを混合することで、人造大理石の切削加工性を低下させずに製品強度を上げることができるものである。
【0014】
すなわち、切削加工性能には充填剤として柔らかい水酸化アルミニウムが寄与し、それより硬いシリカ、あるいはガラスパウダーが製品強度を上げることに寄与するものである。
【0015】
したがって、シリカあるいはガラスパウダーの混合割合が高くなると製品強度は更に上がるが、同時に切削加工性が低下してくるのでシリカあるいはガラスパウダーの混合割合は水酸化アルミニウム100重量部に対して5〜50重量部の範囲が好ましい。
【0016】
また、上記の2種類以上の充填剤を混合することで、得られる人造大理石の製品の透明感を制御することが可能となる。
【0017】
すなわち、人造大理石の製品の透明感は用いる合成樹脂の屈折率と充填剤の屈折率の差により決まり、その差が小さいほど透明感の高いものが得られる。しかして、ビニルエステル樹脂の屈折率はn=1.56〜1.58であり、また、水酸化アルミニウムの屈折率はn=1.57、また、シリカの屈折率はn=1.46〜1.54、ガラスパウダーの屈折率はn=1.53〜1.54であるため、通常、水酸化アルミニウム単独で配合する場合はビニルエステル樹脂との屈折率が近すぎて透明になりすぎるが、ビニルエステル樹脂との屈折率が遠いシリカあるいはガラスパウダーを混合することで、透明度を制御することができるものである。したがって、従来使用した透明度を調整するための隠蔽性の高い着色剤を配合するということが必要でなくなるものである。
【0018】
また、充填剤として用いる水酸化アルミニウム、シリカ、ガラスパウダーはシランカップリング剤で処理されたものを用いることが人造大理石の衝撃強度安定性の面から好ましいものである。
【0019】
上記のようにして得られる人造大理石の組成物を加熱硬化することで人造大理石を製造することができるものである。
【0020】
すなわち、人造大理石を製造するに当たっては、まず、ビニルエステル樹脂に、水酸化アルミニウムに加え、シリカとガラスパウダーとのうち少なくとも1つを目的とする製品強度(靱性)と透明感に合うように設計した配合割合で配合するものである。それぞれの粒度も適宜組み合わせて配合することができる。また、硬化剤、及び各種添加剤を所定の割合で配合し、撹拌機等により混合撹拌して人造大理石の組成物を調製する。このようにして得られた人造大理石の組成物を3〜50Torr程度の減圧下で真空脱泡処理し、脱泡された人造大理石の組成物を所定の金型内に注入し、50〜110℃の温度で30〜120分間加熱する。加熱することで、人造大理石の組成物中のビニルエステル樹脂をスチレンモノマー等の架橋剤と共重合反応を促進させて人造大理石組成物の硬化成形を行うことができる。
【0021】
このようにして製造される人造大理石は、人造大理石の切削加工性能を低下させずに製品強度を上げ、且つ、透明感を着色剤なしでコントロールして、外観性、加工性、強度(靱性)の優れた人造大理石を得ることができるものである。
【0022】
得られた人造大理石は例えば板状に成形してキッチンカウンターの天板に使用することができるものである。
【0023】
【実施例】
以下、本発明を実施例により詳述する。
【0024】
(実施例1)
ビニルエステル樹脂としてビスフェノールA型樹脂(プロミネートP−310武田薬品(株)製)110重量部に、充填剤として、水酸化アルミニウム(CW−308 住友化学(株)製)を150重量部、シリカ(CRYSTALITE A−A 龍森(株)製)を50重量部配合し、硬化剤(パーキュアHO 日本油脂(株)製)を適量添加して人造大理石の組成物を得た。
【0025】
上記のようにして得た人造大理石の組成物を25Torrの減圧下で30分間真空脱泡処理し、10mm厚の平板を形成するための金型内に注入し、金型温度を90℃で60分間加熱して人造大理石の組成物を硬化させた。
【0026】
得られた板状の人造大理石は、耐衝撃強度:シャルピー衝撃強度15.2kgf・cm/cm、また、フェーズメータ試験機による透明度評価は光透過率=25.8であった。
【0027】
(実施例2)
ビニルエステル樹脂としてビスフェノールA型樹脂(プロミネートP−311武田薬品(株)製)110重量部に、充填剤として、水酸化アルミニウム(CW−310 住友化学(株)製)を160重量部、シリカ(CRYSTALITE 2105−30 龍森(株)製)を55重量部配合し、硬化剤(パーキュアHO 日本油脂(株)製)を適量添加して人造大理石の組成物を得た。
【0028】
上記のようにして得た人造大理石の組成物を25Torrの減圧下で30分間真空脱泡処理し、10mm厚の平板を形成するための金型内に注入し、金型温度を90℃で60分間加熱して人造大理石の組成物を硬化させた。
【0029】
得られた板状の人造大理石は、耐衝撃強度:シャルピー衝撃強度17.0kgf・cm/cm、また、フェーズメータ試験機による透明度評価は光透過率=24.0であった。
【0030】
(実施例3)
ビニルエステル樹脂としてビスフェノールA型樹脂(リポキシ R−804 昭和高分子(株)製)110重量部に、充填剤として、水酸化アルミニウム(CW−310 住友化学(株)製)を180重量部、ガラスパウダー(M−80S日本フェロー(株)製)を25重量部配合し、硬化剤(パーキュアHO 日本油脂(株)製)を適量添加して人造大理石の組成物を得た。
【0031】
上記のようにして得た人造大理石の組成物を25Torrの減圧下で30分間真空脱泡処理し、10mm厚の平板を形成するための金型内に注入し、金型温度を90℃で60分間加熱して人造大理石の組成物を硬化させた。
【0032】
得られた板状の人造大理石は、耐衝撃強度:シャルピー衝撃強度18.3kgf・cm/cm、また、フェーズメータ試験機による透明度評価は光透過率=26.3であった。
【0033】
(実施例4)
ビニルエステル樹脂としてビスフェノールA型樹脂(リポキシ R−806 昭和高分子(株)製)110重量部に、充填剤として、水酸化アルミニウム(CW−308 住友化学(株)製)を150重量部、シリカ(MILLISIL M10 白石工業(株)製)を30重量部、ガラスパウダー(M−80PS 日本フェロー(株)製)を30重量部配合し、硬化剤(パーキュアHO 日本油脂(株)製)を適量添加して人造大理石の組成物を得た。
【0034】
上記のようにして得た人造大理石の組成物を25Torrの減圧下で30分間真空脱泡処理し、10mm厚の平板を形成するための金型内に注入し、金型温度を90℃で60分間加熱して人造大理石の組成物を硬化させた。
【0035】
得られた板状の人造大理石は、耐衝撃強度:シャルピー衝撃強度17.8kgf・cm/cm、また、フェーズメータ試験機による透明度評価は光透過率=23.1であった。
【0036】
(実施例5)
ビニルエステル樹脂としてノボラック型樹脂(リポキシ H−600 昭和高分子(株)製)100重量部に、充填剤として、水酸化アルミニウム(H−310 昭和電工(株)製)を140重量部、シリカ(MILLISIL M8 白石工業(株)製)を10重量部、ガラスパウダー(CF002−10D 日本フリット(株)製)を50重量部配合し、硬化剤(パーキュアHO 日本油脂(株)製)を適量添加して人造大理石の組成物を得た。
【0037】
上記のようにして得た人造大理石の組成物を25Torrの減圧下で30分間真空脱泡処理し、10mm厚の平板を形成するための金型内に注入し、金型温度を90℃で60分間加熱して人造大理石の組成物を硬化させた。
【0038】
得られた板状の人造大理石は、耐衝撃強度:シャルピー衝撃強度18.0kgf・cm/cm、また、フェーズメータ試験機による透明度評価は光透過率=25.1であった。
【0042】
【発明の効果】
上記のように本発明の請求項1記載の発明にあって、ビニルエステル樹脂に充填剤と硬化剤などの添加物を配合して注型成形により得られる人造大理石の組成物において、充填剤として、水酸化アルミニウムに加え、シリカ、ガラスパウダーのうちの少なくとも一つ以上を用い、上記水酸化アルミニウムに対するシリカあるいはガラスパウダーの配合割合を水酸化アルミニウム100重量部に対して5〜50重量部としてあるので、上記したビニルエステル樹脂に2種類以上の充填剤を組み合わせた組成物を用いて人造大理石を製造することで、切削加工性能には充填剤として柔らかい水酸化アルミニウムが寄与し、それより硬いシリカあるいはガラスパウダーが製品強度を上げることに寄与することになり、この結果、好適な切削加工性を有し製品強度を上げることができる人造大理石を得ることができるものである。
【0044】
また、請求項2記載の発明にあっては、上記請求項1記載の発明の効果に加えて、充填剤がシランカップリング剤で処理されているので、衝撃強度安定性に優れた人造大理石を得ることができるものである。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composition of artificial marble used as a furniture member or building material.
[0002]
[Prior art]
Conventionally, an artificial marble composition obtained by blending additives such as a filler and a curing agent with a synthetic resin is known. The artificial marble composition is cast into a mold having a desired shape, and the cast marble is formed by heating to form the artificial marble.
[0003]
Conventionally, a polyester resin, an acrylic resin, a vinyl ester resin, or the like has been used as a synthetic resin as a raw material for producing artificial marble. As the filler, silica, calcium carbonate, aluminum hydroxide, glass powder, clay and the like are used, and conventionally, each is blended alone.
[0004]
Usually, when silica or glass powder is used alone as a filler, the product itself of the artificial marble obtained is high because the filler itself is hard, but the machinability is poor. On the other hand, when aluminum hydroxide is used alone, The filler itself is softer than silica and glass powder, and the machinability is improved, but there is a problem that the product strength is lowered. Therefore, when aluminum hydroxide is used alone as a filler, it is necessary to produce a product by attaching a reinforcing plate such as a plywood to the back surface of the artificial marble.
[0005]
In addition, when vinyl ester resin is used as the synthetic resin, if aluminum hydroxide is used as the filler, the refractive index of the light of vinyl ester resin and aluminum hydroxide is too close, and the transparency of the product is too high. It was necessary to prevent the phenomenon by adding a highly concealing colorant.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and increases the product strength without reducing the machinability of the artificial marble, and controls the transparency without the use of a colorant, thereby improving the appearance and strength (toughness). It is an object of the present invention to provide an artificial marble composition capable of obtaining an artificial marble having excellent hardness.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, an artificial marble composition according to the present invention is an artificial marble composition obtained by blending a vinyl ester resin with additives such as a filler and a curing agent, and cast molding. In addition to aluminum hydroxide, at least one of silica and glass powder is used , and the blending ratio of silica or glass powder to aluminum hydroxide is 5 to 50 parts by weight with respect to 100 parts by weight of aluminum hydroxide. It is characterized by that. Thus, by producing artificial marble using a composition in which two or more kinds of fillers are combined with vinyl ester resin, it is possible to obtain artificial marble having suitable cutting workability and high product strength. Become.
[0009]
Moreover, it is preferable that the filler is processed with the silane coupling agent. By adopting such a configuration, an artificial marble excellent in impact strength stability can be obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments.
[0011]
As a synthetic resin used for the composition of the artificial marble in the present invention, a vinyl ester resin is used.
[0012]
Vinyl ester resins include bisphenol A type and novolac type, but are not particularly limited. The composition of the artificial marble can be obtained by mixing and blending these vinyl ester resins, fillers, hardeners and other additives.
[0013]
In the present invention, in addition to aluminum hydroxide, at least one of silica and glass powder is used as a filler. That is, when aluminum hydroxide and silica are used as fillers, when aluminum hydroxide and glass powder are used as fillers, aluminum hydroxide, silica and glass powder may be used as fillers. Thus, by mixing aluminum hydroxide and silica or glass powder, or mixing aluminum hydroxide and silica and glass powder, the product strength can be increased without degrading the machinability of artificial marble. .
[0014]
That is, soft aluminum hydroxide as a filler contributes to the cutting performance, and harder silica or glass powder contributes to increasing the product strength.
[0015]
Accordingly, when the mixing ratio of silica or glass powder is increased, the product strength is further increased, but at the same time, the machinability is lowered. Therefore, the mixing ratio of silica or glass powder is 5 to 50 weights with respect to 100 parts by weight of aluminum hydroxide. A range of parts is preferred.
[0016]
Moreover, it becomes possible to control the transparency of the resulting artificial marble product by mixing two or more kinds of fillers.
[0017]
That is, the transparency of the artificial marble product is determined by the difference between the refractive index of the synthetic resin used and the refractive index of the filler. The smaller the difference, the higher the transparency. Thus, the refractive index of the vinyl ester resin is n = 1.56 to 1.58, the refractive index of aluminum hydroxide is n = 1.57, and the refractive index of silica is n = 1.46 to 1.54, the refractive index of glass powder is n = 1.53 to 1.54. Therefore, when blended with aluminum hydroxide alone, the refractive index with the vinyl ester resin is too close and too transparent. The transparency can be controlled by mixing silica or glass powder having a refractive index far from the vinyl ester resin. Therefore, it is not necessary to add a coloring agent having high concealability for adjusting the transparency used conventionally.
[0018]
Moreover, it is preferable from the surface of the impact strength stability of artificial marble to use the aluminum hydroxide, silica, and glass powder used as a filler as those treated with a silane coupling agent.
[0019]
The artificial marble can be produced by heat-curing the composition of the artificial marble obtained as described above.
[0020]
In other words, when producing artificial marble, first, in addition to vinyl ester resin, aluminum hydroxide, at least one of silica and glass powder is designed to match the product strength (toughness) and transparency. The blending ratio is as follows. Each particle size can also be combined in an appropriate combination. Further, a composition of artificial marble is prepared by blending a curing agent and various additives at a predetermined ratio and mixing and stirring with a stirrer or the like. The composition of the artificial marble thus obtained was subjected to vacuum defoaming treatment under a reduced pressure of about 3 to 50 Torr, and the defoamed artificial marble composition was poured into a predetermined mold, and 50 to 110 ° C. For 30-120 minutes. By heating, the vinyl ester resin in the artificial marble composition can be copolymerized with a crosslinking agent such as a styrene monomer to accelerate the copolymerization reaction, and the artificial marble composition can be cured and molded.
[0021]
The artificial marble produced in this way increases the strength of the product without degrading the cutting performance of the artificial marble, and controls the transparency without the use of a coloring agent, so that the appearance, workability and strength (toughness) are improved. It is possible to obtain an excellent artificial marble.
[0022]
The obtained artificial marble can be used, for example, as a top plate of a kitchen counter after being formed into a plate shape.
[0023]
【Example】
Hereinafter, the present invention will be described in detail by way of examples.
[0024]
Example 1
110 parts by weight of bisphenol A resin (Prominate P-310 Takeda Pharmaceutical Co., Ltd.) as a vinyl ester resin, 150 parts by weight of aluminum hydroxide (CW-308 manufactured by Sumitomo Chemical Co., Ltd.) as a filler, silica ( 50 parts by weight of CRYSTALITE A-A Tatsumori Co., Ltd.) was blended, and an appropriate amount of a curing agent (Percure HO Nippon Oil & Fats Co., Ltd.) was added to obtain an artificial marble composition.
[0025]
The composition of the artificial marble obtained as described above was subjected to vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes, and poured into a mold for forming a 10 mm thick flat plate. The artificial marble composition was cured by heating for a minute.
[0026]
The obtained plate-shaped artificial marble had impact resistance: Charpy impact strength of 15.2 kgf · cm / cm 2 , and the transparency evaluation by a phase meter tester was light transmittance = 25.8.
[0027]
(Example 2)
110 parts by weight of bisphenol A resin (Prominate P-311 Takeda Pharmaceutical Co., Ltd.) as a vinyl ester resin, 160 parts by weight of aluminum hydroxide (CW-310 Sumitomo Chemical Co., Ltd.) as a filler, silica ( 55 parts by weight of CRYSTALITE 2105-30 (manufactured by Tatsumori Co., Ltd.) was blended, and an appropriate amount of a curing agent (Percure HO Nippon Oil & Fats Co., Ltd.) was added to obtain an artificial marble composition.
[0028]
The composition of the artificial marble obtained as described above was subjected to vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes, and poured into a mold for forming a 10 mm thick flat plate. The artificial marble composition was cured by heating for a minute.
[0029]
The obtained plate-shaped artificial marble had an impact resistance: Charpy impact strength of 17.0 kgf · cm / cm 2 , and the transparency evaluation by a phase meter tester was light transmittance = 24.0.
[0030]
(Example 3)
110 parts by weight of bisphenol A resin (Lipoxy R-804, Showa High Polymer Co., Ltd.) as vinyl ester resin, 180 parts by weight of aluminum hydroxide (CW-310, manufactured by Sumitomo Chemical Co., Ltd.) as a filler, glass 25 parts by weight of powder (manufactured by M-80S Nippon Fellow Co., Ltd.) was blended, and an appropriate amount of a curing agent (manufactured by Percure HO Nippon Oil & Fats Co., Ltd.) was added to obtain an artificial marble composition.
[0031]
The composition of the artificial marble obtained as described above was subjected to vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes, and poured into a mold for forming a 10 mm thick flat plate. The artificial marble composition was cured by heating for a minute.
[0032]
The obtained plate-shaped artificial marble had impact resistance: Charpy impact strength of 18.3 kgf · cm / cm 2 , and the transparency evaluation by a phase meter tester was light transmittance = 26.3.
[0033]
Example 4
110 parts by weight of bisphenol A resin (Lipoxy R-806, Showa High Polymer Co., Ltd.) as vinyl ester resin, 150 parts by weight of aluminum hydroxide (CW-308, manufactured by Sumitomo Chemical Co., Ltd.) as silica, silica (MILLISIL M10 manufactured by Shiroishi Kogyo Co., Ltd.) 30 parts by weight, glass powder (M-80PS manufactured by Nippon Fellow Co., Ltd.) 30 parts by weight, and an appropriate amount of curing agent (Percure HO manufactured by Nippon Oil & Fats Co., Ltd.) is added. As a result, an artificial marble composition was obtained.
[0034]
The composition of the artificial marble obtained as described above was subjected to vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes, and poured into a mold for forming a 10 mm thick flat plate. The artificial marble composition was cured by heating for a minute.
[0035]
The obtained plate-shaped artificial marble had an impact resistance: Charpy impact strength of 17.8 kgf · cm / cm 2 , and a transparency evaluation by a phase meter tester was a light transmittance = 23.1.
[0036]
(Example 5)
As a vinyl ester resin, 100 parts by weight of a novolak type resin (Lipoxy H-600 manufactured by Showa High Polymer Co., Ltd.) and 140 parts by weight of aluminum hydroxide (H-310 manufactured by Showa Denko KK) as a filler, silica ( 10 parts by weight of MILLISIL M8 manufactured by Shiraishi Kogyo Co., Ltd. and 50 parts by weight of glass powder (CF002-10D manufactured by Nippon Frit Co., Ltd.) are added, and an appropriate amount of a curing agent (Percure HO manufactured by Nippon Oils Co., Ltd.) is added. To obtain a composition of artificial marble.
[0037]
The composition of the artificial marble obtained as described above was subjected to vacuum defoaming treatment under a reduced pressure of 25 Torr for 30 minutes, and poured into a mold for forming a 10 mm thick flat plate. The artificial marble composition was cured by heating for a minute.
[0038]
The obtained plate-shaped artificial marble had impact resistance: Charpy impact strength of 18.0 kgf · cm / cm 2 , and the transparency evaluation by a phase meter tester was light transmittance = 25.1.
[0042]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, in the composition of artificial marble obtained by casting by adding additives such as a filler and a curing agent to a vinyl ester resin, in addition to aluminum hydroxide, silica, using at least one or more of the glass powder, and 5 to 50 parts by weight blending ratio of the silica or glass powder for the aluminum hydroxide against aluminum hydroxide 100 parts by weight Therefore, by producing artificial marble using a composition in which two or more kinds of fillers are combined with the vinyl ester resin described above, soft aluminum hydroxide contributes to the cutting performance and is harder than that. will be a silica or glass powder contributing to raising the product strength, as a result, a suitable machinability And it is capable of obtaining artificial marble which can increase the product strength.
[0044]
Further, in the invention described in claim 2 , in addition to the effect of the invention described in claim 1, since the filler is treated with a silane coupling agent, an artificial marble excellent in impact strength stability is obtained. It can be obtained.

Claims (2)

ビニルエステル樹脂に充填剤と硬化剤などの添加物を配合して注型成形により得られる人造大理石の組成物において、充填剤として、水酸化アルミニウムに加え、シリカ、ガラスパウダーのうちの少なくとも一つ以上を用い、上記水酸化アルミニウムに対するシリカあるいはガラスパウダーの配合割合を水酸化アルミニウム100重量部に対して5〜50重量部としたことを特徴とする人造大理石の組成物。In an artificial marble composition obtained by compounding an additive such as a filler and a curing agent with a vinyl ester resin and cast molding, as a filler, in addition to aluminum hydroxide, at least one of silica and glass powder A composition of artificial marble, wherein the blending ratio of silica or glass powder to aluminum hydroxide is 5 to 50 parts by weight with respect to 100 parts by weight of aluminum hydroxide . 充填剤がシランカップリング剤で処理されていることを特徴とする請求項1記載の人造大理石の組成物。2. The artificial marble composition according to claim 1, wherein the filler is treated with a silane coupling agent.
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JPS62132751A (en) * 1985-12-06 1987-06-16 株式会社クラレ Semi-transparent inorganic organic composite body
JPH03174347A (en) * 1989-11-30 1991-07-29 Central Glass Co Ltd Molded body
JPH04265262A (en) * 1991-02-20 1992-09-21 Sekisui Chem Co Ltd Resin composition for artificial marble
WO1996011890A1 (en) * 1994-10-14 1996-04-25 Mitsubishi Rayon Co., Ltd. Artificial marble and process for producing the same
JPH08188456A (en) * 1995-01-13 1996-07-23 Dainippon Ink & Chem Inc Artificial marble and its manufacturing method
JPH092857A (en) * 1995-06-15 1997-01-07 M R C Du Pont Kk Grain-tone artificial marble
JPH09110948A (en) * 1995-08-11 1997-04-28 Takeda Chem Ind Ltd Vinyl ester resin composition and cured article
JPH09241312A (en) * 1996-03-08 1997-09-16 Showa Denko Kk Photocurable composition for artificial marble and method for curing the same
JPH1071625A (en) * 1996-08-30 1998-03-17 Hitachi Chem Co Ltd Fiber reinforced plastic molded product

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JPS60245661A (en) * 1984-05-18 1985-12-05 Kyowa Gas Chem Ind Co Ltd Organic-inorganic composite composition
JPS62132751A (en) * 1985-12-06 1987-06-16 株式会社クラレ Semi-transparent inorganic organic composite body
JPH03174347A (en) * 1989-11-30 1991-07-29 Central Glass Co Ltd Molded body
JPH04265262A (en) * 1991-02-20 1992-09-21 Sekisui Chem Co Ltd Resin composition for artificial marble
WO1996011890A1 (en) * 1994-10-14 1996-04-25 Mitsubishi Rayon Co., Ltd. Artificial marble and process for producing the same
JPH08188456A (en) * 1995-01-13 1996-07-23 Dainippon Ink & Chem Inc Artificial marble and its manufacturing method
JPH092857A (en) * 1995-06-15 1997-01-07 M R C Du Pont Kk Grain-tone artificial marble
JPH09110948A (en) * 1995-08-11 1997-04-28 Takeda Chem Ind Ltd Vinyl ester resin composition and cured article
JPH09241312A (en) * 1996-03-08 1997-09-16 Showa Denko Kk Photocurable composition for artificial marble and method for curing the same
JPH1071625A (en) * 1996-08-30 1998-03-17 Hitachi Chem Co Ltd Fiber reinforced plastic molded product

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