JP2001335382A - Composition for lightweight artificial marble, and lightweight artificial marble - Google Patents

Composition for lightweight artificial marble, and lightweight artificial marble

Info

Publication number
JP2001335382A
JP2001335382A JP2000153333A JP2000153333A JP2001335382A JP 2001335382 A JP2001335382 A JP 2001335382A JP 2000153333 A JP2000153333 A JP 2000153333A JP 2000153333 A JP2000153333 A JP 2000153333A JP 2001335382 A JP2001335382 A JP 2001335382A
Authority
JP
Japan
Prior art keywords
artificial marble
mass
lightweight artificial
methyl methacrylate
composition
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.)
Withdrawn
Application number
JP2000153333A
Other languages
Japanese (ja)
Inventor
Hidenori Osawa
秀紀 大澤
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.)
Du Pont MRC Co Ltd
Original Assignee
Du Pont MRC Co 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 Du Pont MRC Co Ltd filed Critical Du Pont MRC Co Ltd
Priority to JP2000153333A priority Critical patent/JP2001335382A/en
Publication of JP2001335382A publication Critical patent/JP2001335382A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/54—Substitutes for natural stone, artistic materials or the like
    • C04B2111/542—Artificial natural stone
    • C04B2111/545—Artificial marble

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight artificial marble reduced in weight without losing graceful appearance and excellent strength, and having good workability and application capability. SOLUTION: A lightweight artificial marble can be obtained by polymerization curing a lightweight artificial marble composition consisting of (A) 10-65 mass % of polymerizable components with its main component of methyl methacrylate, (B) 30-85 mass % of an inorganic filler, and (C) 0.1-10 mass % of an organic hollow filler with its specific gravity of 0.05-0.7 and its average particle size of 10-300 μm.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、軽量人工大理石用
組成物及び該組成物を重合硬化して得られた軽量人工大
理石に関する。The present invention relates to a composition for lightweight artificial marble and a lightweight artificial marble obtained by polymerizing and curing the composition.

【０００２】[0002]

【従来の技術】人工大理石は一般に、樹脂と無機充填材
から成り、特有の優美な外観、容易な加工性、優れた強
度を有している。人工大理石はその質感、加工性、施工
性、耐候性、強度などの点で優れた性能を備えるので、
例えば、カウンタートップ、キッチン天板、家具、サニ
タリー用途、内装材、トイレブースパネル材、ステーシ
ョナリー小物等、多くの用途に幅広く用いられている。
また、これらの用途の一部では輸送コスト、加工・施工
時の作業性から、軽量な人工大理石が望まれている。特
に、人工大理石を使用した扉やパーティション用部材に
おいては、補強を目的として金属、木枠、各種ボード材
等で人工大理石に裏打ちを行う事が多く、部材質量はさ
らに増加してしまう。このため、施工に際しては多くの
人手を要し、さらに既製品の金具では部材強度・耐久性
が不足するため、高価な特注金具を使用する必要があっ
た。そこで、コスト削減及び取り付け金具の耐久性を向
上させるため、より軽量な人工大理石が望まれていた。
特開平２−９２８５３号公報には、バルーン状無機充填
材を樹脂バインダーに混合し、所定の形状に重合硬化し
た比重及び熱伝導率の小さい人工石成型品が記載されて
いる。しかしながら、この人工石成型品はアクリル人工
大理石特有の優美な外観及び優れた強度を備えておら
ず、高級感の欠けるものであった。2. Description of the Related Art Artificial marble is generally composed of a resin and an inorganic filler, and has a unique elegant appearance, easy workability, and excellent strength. Artificial marble has excellent performance in terms of texture, workability, workability, weatherability, strength, etc.
For example, it is widely used in many applications such as countertops, kitchen tops, furniture, sanitary applications, interior materials, toilet booth panel materials, and small stationary items.
For some of these uses, lightweight artificial marble is desired from the viewpoint of transportation costs and workability during processing and construction. In particular, in the case of doors and partition members using artificial marble, artificial marble is often backed with metal, wooden frames, various board materials, or the like for the purpose of reinforcement, and the mass of the members further increases. For this reason, a lot of manpower is required at the time of construction, and since the strength and durability of a member made of a ready-made product are insufficient, expensive custom-made metal fittings have to be used. Therefore, a lighter artificial marble has been desired in order to reduce costs and improve the durability of the mounting bracket.
Japanese Unexamined Patent Publication (Kokai) No. 2-92953 describes an artificial stone molded product having a low specific gravity and a low thermal conductivity, which is obtained by mixing a balloon-like inorganic filler with a resin binder and polymerizing and curing into a predetermined shape. However, this artificial stone molded product does not have an elegant appearance and excellent strength unique to acrylic artificial marble, and lacks a sense of quality.

【０００３】[0003]

【発明が解決しようとする課題】この様な状況におい
て、従来のアクリル人工大理石特有の優美な外観、優れ
た強度を保持しながら軽量化をはかる技術の確立が要望
されていた。本発明は、かかる状況に鑑みてなされたも
のであり、アクリル人工大理石の特徴を損なうことな
く、加工性及び施工性に優れた軽量人工大理石の提供を
課題とする。Under such circumstances, there has been a demand for the establishment of a technique for reducing the weight while maintaining an excellent appearance and excellent strength characteristic of the conventional acrylic artificial marble. The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a lightweight artificial marble excellent in workability and workability without impairing the characteristics of the acrylic artificial marble.

【０００４】[0004]

【課題を解決するための手段】上記課題は、メタクリル
酸メチルを主成分とする重合性成分（Ａ）１０〜６５質
量％、無機充填材（Ｂ）３０〜８５質量％、比重が０．
０５〜０．７で平均粒径が１０〜３００μｍである有機
中空充填材（Ｃ）０．１〜１０質量％からなる軽量人工
大理石用組成物及び該組成物を重合硬化して得られた軽
量人工大理石によって解決される。The object of the present invention is to provide a polymerizable component containing methyl methacrylate as a main component (A) in an amount of 10 to 65% by mass, an inorganic filler (B) in an amount of 30 to 85% by mass, and a specific gravity of 0.
A lightweight artificial marble composition comprising 0.1 to 10% by mass of an organic hollow filler (C) having an average particle size of 10 to 300 μm and a lightweight obtained by polymerizing and curing the composition. Solved by artificial marble.

【０００５】[0005]

【発明の実施の形態】本発明に用いるメタクリル酸メチ
ルを主成分とする重合性成分（Ａ）としては、メタクリ
ル酸メチル単独、メタクリル酸メチルと分子内にビニル
基を１つ有する他のビニル単量体との単量体混合物、メ
タクリル酸メチル単独重合体と前記単量体との混合物、
またはメタクリル酸メチルと分子内にビニル基を１つ有
する他のビニル単量体との共重合体と前記単量体との混
合物が用いられ、組成物総量に占める割合は１０〜６５
質量％が適当である。また、この重合性成分（Ａ）とし
ては、予備重合させたシラップを用いるのが望ましく、
シラップを用いることの利点としては、(1) 重合性成分
に、無機充填材（Ｂ）を添加する際、重合性成分である
シラップ粘度をコントロールすることによって、添加物
の沈降を防ぐことができること、(2) 重合性成分の重合
硬化時間を短縮でき、生産性を上げることができること
などが挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION As the polymerizable component (A) containing methyl methacrylate as a main component used in the present invention, methyl methacrylate alone, methyl methacrylate and another vinyl monomer having one vinyl group in the molecule are used. Monomer mixture, a mixture of methyl methacrylate homopolymer and the monomer,
Alternatively, a mixture of a copolymer of methyl methacrylate and another vinyl monomer having one vinyl group in the molecule and a mixture of the above monomers is used, and the ratio of the mixture to the total amount of the composition is 10 to 65.
% By weight is appropriate. As the polymerizable component (A), it is preferable to use a syrup that has been prepolymerized,
The advantages of using syrup are: (1) When adding the inorganic filler (B) to the polymerizable component, sedimentation of the additive can be prevented by controlling the viscosity of the syrup, which is the polymerizable component. (2) The time for polymerization and curing of the polymerizable component can be shortened, and the productivity can be increased.

【０００６】シラップを製造するには、メタクリル酸メ
チルを重合させ途中で重合を停止させる方法、または塊
状重合や懸濁重合によって予め重合したメタクリル酸メ
チルを主成分とする重合体を、メタクリル酸メチルを主
成分とする単量体に溶解する方法が知られている。シラ
ップは、２５℃における粘度が２０〜３００ｃＰ（セン
チポアズ）を有するようなものであることが好ましい。[0006] To produce syrup, a method of polymerizing methyl methacrylate and stopping the polymerization in the middle, or a method in which a polymer mainly composed of methyl methacrylate previously polymerized by bulk polymerization or suspension polymerization is used. Is known in the art. The syrup preferably has a viscosity at 25 ° C. of 20 to 300 cP (centipoise).

【０００７】重合性成分（Ａ）として用いられる分子内
にビニル基を１つ有する他のビニル単量体としては、ス
チレン、酢酸ビニル、アクリロニトリル；及びメタクリ
ル酸エチル、メタクリル酸ブチル、メタクリル酸ラウリ
ル、メタクリル酸２−エチルヘキシル、メタクリル酸２
−ヒドロキシエチル、メタクリル酸グリシジル、アクリ
ル酸エチル、アクリル酸メチル、アクリル酸ブチル、ア
クリル酸２−エチルヘキシル、アクリル酸ラウリル等の
（メタ）アクリル酸エステルが挙げられ、重合性成分の
２０質量％以下で使用できる。Other vinyl monomers having one vinyl group in the molecule used as the polymerizable component (A) include styrene, vinyl acetate, acrylonitrile; and ethyl methacrylate, butyl methacrylate, lauryl methacrylate, 2-ethylhexyl methacrylate, methacrylic acid 2
(Meth) acrylates such as hydroxyethyl, glycidyl methacrylate, ethyl acrylate, methyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, and the like. Can be used.

【０００８】更に、重合性成分（Ａ）を架橋させるため
の架橋剤としては、分子内に２つ以上のビニル基を有す
る化合物、例えばジメタクリル酸エチレングリコール、
ジメタクリル酸１，３−ブチレングリコール、トリメタ
クリル酸トリメチロールプロパン等の（メタ）アクリル
酸エステル化合物があげられる。Further, as a crosslinking agent for crosslinking the polymerizable component (A), a compound having two or more vinyl groups in a molecule, for example, ethylene glycol dimethacrylate,
(Meth) acrylic acid ester compounds such as 1,3-butylene glycol dimethacrylate and trimethylolpropane trimethacrylate are exemplified.

【０００９】また、この重合性成分（Ａ）を硬化させる
ために、通常は硬化触媒を併用するが、この硬化触媒と
しては、ターシャリーブチルパーオキシマレイン酸、過
酸化ベンゾイル、クメンヒドロペルオキシド、ターシャ
リーブチルヒドロペルオキシド、ジクミルペルオキシ
ド、過酸化アセチル、過酸化ラウロイル、アゾビスイソ
ブチロニトリル等が挙げられる。常温で重合硬化させる
場合は、例えば過酸化物とアミン類、過酸化物とスルフ
ィン酸類、過酸化物とコバルト化合物との組合わせ、タ
ーシャリーブチルパーオキシマレイン酸等のパーオキシ
化合物とグリコールジメルカプトアセテート等のメルカ
プタン化合物および水（脱イオン水等）との組合わせ等
が挙げられる。In order to cure the polymerizable component (A), a curing catalyst is usually used in combination. Examples of the curing catalyst include tertiary butyl peroxymaleic acid, benzoyl peroxide, cumene hydroperoxide and tertiary butyl peroxide. Examples include l-butyl hydroperoxide, dicumyl peroxide, acetyl peroxide, lauroyl peroxide, azobisisobutyronitrile and the like. When polymerized and cured at room temperature, for example, a combination of a peroxide and an amine, a peroxide and a sulfinic acid, a combination of a peroxide and a cobalt compound, a peroxy compound such as tertiary butyl peroxymaleic acid, and glycol dimercaptoacetate And the like with mercaptan compounds and water (such as deionized water).

【００１０】本発明に用いられる無機充填材（Ｂ）は、
水酸化アルミニウム、炭酸カルシウム、水酸化マグネシ
ウム、シリカから選ばれる少なくとも１種であるが、好
ましくは水酸化アルミニウムである。この無機充填材の
粒子サイズは、粒径が１〜１５０μｍで、平均粒径が１
０〜１００μｍであるものが好ましい。この範囲より粒
径が小さすぎると成形物の光透過性が低下し、また、粒
子径が大きすぎると成形物の物性低下を招く。The inorganic filler (B) used in the present invention comprises:
It is at least one selected from aluminum hydroxide, calcium carbonate, magnesium hydroxide, and silica, and is preferably aluminum hydroxide. The particle size of the inorganic filler is 1 to 150 μm, and the average particle size is 1
Those having a thickness of 0 to 100 μm are preferred. If the particle size is smaller than this range, the light transmittance of the molded product is reduced, and if the particle size is too large, the physical properties of the molded product are reduced.

【００１１】無機充填材（Ｂ）は、過剰に添加すると強
度の低下を招き、反対に少なすぎると得られる人工大理
石の質感が損なわれる。このことから、組成物総量に対
して３０〜８５質量％添加することが好ましい。なお、
この無機充填材の表面を、例えば、シラン系カップリン
グ剤、チタネート系カップリング剤、ステアリン酸等で
処理したものも同様に扱うことができる。When the inorganic filler (B) is added excessively, the strength is reduced, and when it is too small, the texture of the artificial marble obtained is impaired. For this reason, it is preferable to add 30 to 85% by mass based on the total amount of the composition. In addition,
A material obtained by treating the surface of the inorganic filler with, for example, a silane coupling agent, a titanate coupling agent, stearic acid, or the like can also be handled.

【００１２】本発明に用いられる有機中空充填材（Ｃ）
としては、いわゆるマイクロバルーンが適しており、材
質としてはフェノール、塩化ビニリデン、アクリル、ア
クリル−アクリロニトリル共重合体等があるが特に限定
されない。また、この有機中空充填材の表面が炭酸カル
シウム、酸化チタン等の粉体でコーティングされている
ものを使用してもよい。この有機中空充填材の粒子サイ
ズは、好ましくは平均粒径が１０〜３００μｍであり、
その比重は好ましくは０．０５〜０．７程度である。Organic hollow filler (C) used in the present invention
As the material, so-called microballoons are suitable, and the materials include, but are not particularly limited to, phenol, vinylidene chloride, acryl, and acryl-acrylonitrile copolymer. Further, the organic hollow filler whose surface is coated with a powder such as calcium carbonate or titanium oxide may be used. The particle size of the organic hollow filler preferably has an average particle size of 10 to 300 μm,
Its specific gravity is preferably about 0.05 to 0.7.

【００１３】有機中空充填材（Ｃ）は、過剰に添加する
と成形物の光透過性が低下し、反対に少なすぎると目的
とする軽量化効果が損なわれる。このことから、組成物
総量に対して、１〜１０質量％添加することが好まし
く、より好ましくは２〜８質量％である。When the organic hollow filler (C) is excessively added, the light transmittance of the molded product is reduced. On the other hand, when the organic hollow filler (C) is too small, the intended lightening effect is impaired. For this reason, it is preferable to add 1 to 10% by mass, more preferably 2 to 8% by mass, based on the total amount of the composition.

【００１４】本発明においては、上述の各成分以外に
も、従来より人工大理石の添加成分として知られている
各種の成分を制限無く使用できる。例えば、白色（酸化
チタン、硫化亜鉛）、黄色（酸化鉄イエロー）、黒色
（酸化鉄ブラック）、赤色（酸化鉄レッド）、青色（ウ
ルトラマリンブルー、フタロブルー）等の顔料、染料、
紫外線吸収剤、難燃剤、離型剤、流動化剤、増粘剤、重
合禁止剤、酸化防止剤等が挙げられる。In the present invention, in addition to the above-mentioned components, various components conventionally known as added components of artificial marble can be used without limitation. For example, pigments, dyes such as white (titanium oxide, zinc sulfide), yellow (iron oxide yellow), black (iron oxide black), red (iron oxide red), blue (ultramarine blue, phthalo blue),
Examples include ultraviolet absorbers, flame retardants, release agents, fluidizing agents, thickeners, polymerization inhibitors, antioxidants, and the like.

【００１５】本発明の組成物を重合硬化させることによ
り、軽量人工大理石が得られる。重合硬化させる方法と
しては、レドックス重合、または、熱反応性重合開始剤
を添加し、加熱重合する方法等が挙げられる。これらの
うち、設備コストやプロセスの簡略性などの面で、レド
ックス重合は工業的利用方法として優れている。メタク
リル酸メチルを主成分とする単量体のレドックス重合
は、ベンソイルパーオキサイド等のアシル過酸化物と
Ｎ，Ｎ−ジメチルアニリン、Ｎ，Ｎ−ジエチルアニリ
ン、Ｎ，Ｎ−ジメチルパライジンなどのアミン化合物と
の組み合わせ、またはターシャリーブチルパーオキシマ
レイン酸等のパーオキシル化合物とエチレングリコール
ジメルカプトアセテート等のメルカプタン化合物との組
み合わせなどによって行われる。By polymerizing and curing the composition of the present invention, a lightweight artificial marble can be obtained. Examples of the method of polymerization and curing include redox polymerization or a method of adding a heat-reactive polymerization initiator and performing heat polymerization. Among these, redox polymerization is excellent as an industrial application method in terms of equipment cost and simplicity of the process. Redox polymerization of a monomer containing methyl methacrylate as a main component is performed by acyl peroxide such as benzoyl peroxide and N, N-dimethylaniline, N, N-diethylaniline, N, N-dimethylparaidine or the like. It is carried out by a combination with an amine compound or a combination of a peroxyl compound such as tertiary butyl peroxymaleic acid and a mercaptan compound such as ethylene glycol dimercaptoacetate.

【００１６】本発明の組成物を型内で硬化させることに
より、所望形状の軽量工大理石が得られる。成型法とし
ては、注型成形、射出成形、圧縮成型等の何れの方法も
適用できるが、注型成形が好ましい。また、硬化後の成
型品はサンドペーパーあるいはスポンジ状研削材（スコ
ッチブライト、商品名、住友３Ｍ社製）等を用いて表面
を研削して使用してもよい。By curing the composition of the present invention in a mold, a lightweight marble having a desired shape can be obtained. As a molding method, any method such as cast molding, injection molding, and compression molding can be applied, but cast molding is preferable. Further, the molded product after curing may be used after grinding the surface using sandpaper or a sponge-like abrasive (Scotch Bright, trade name, manufactured by Sumitomo 3M).

【００１７】[0017]

【実施例】以下、本発明を実施例に基づいてより具体的
に説明する。なお、以下の記載において「部」、「％」
は、特記の無い限り質量基準とする。また、評価に用い
た曲げ破断試験はＪＩＳ−Ｋ７２０３、比重測定はＪＩ
Ｓ−Ｋ７１１２に準じて測定した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically based on embodiments. In the following description, "part" and "%"
Is based on mass unless otherwise specified. The bending rupture test used for the evaluation was JIS-K7203, and the specific gravity measurement was JIS-K7203.
It measured according to S-K7112.

【００１８】＜実施例１＞ポリ（メチルメタクリレー
ト）とメチルメタクリレート（質量比２：８）から成る
シラップ６３９．２ｇ（総量に対して４６．３％）、水
酸化アルミニウム粉末（ＢＳ−３３、商品名、日本軽金
属（株）製）６６８．７ｇ（総量に対して４８．５
％）、有機中空充填材（マイクロスフェアーＭＦＬ８０
ＧＣＡ、商品名、松本油脂製薬（株））４２．５ｇ（総
量に対して３．０８％）、ターシャリーブチルパーオキ
シマレイン酸（パーブチルＭＡ、商品名、日本油脂
（株）製）１２．８ｇ及びジメタクリル酸エチレングリ
コール（アクリエステルＥＤ、商品名、三菱レイヨン
（株）製）７．０ｇ（シラップに対して１．１％）を混
合し、ミキサーで撹拌した。<Example 1> 639.2 g (46.3% based on the total amount) of a syrup composed of poly (methyl methacrylate) and methyl methacrylate (mass ratio 2: 8), aluminum hydroxide powder (BS-33, commercial product) Name, manufactured by Nippon Light Metal Co., Ltd.) 668.7 g (48.5 based on the total amount)
%), An organic hollow filler (Microsphere MFL80)
GCA, trade name, Matsumoto Yushi Pharmaceutical Co., Ltd.) 42.5 g (3.08% based on the total amount), tertiary butyl peroxymaleic acid (perbutyl MA, trade name, manufactured by NOF Corporation) 12.8 g And 7.0 g (1.1% based on syrup) of ethylene glycol dimethacrylate (acryester ED, trade name, manufactured by Mitsubishi Rayon Co., Ltd.) and mixed with a mixer.

【００１９】得られた混合スラリーを真空容器内で脱泡
した後、更にグリコールジメルカプトアセテート（ＧＤ
ＭＡ、商品名、淀化学（株）製）２．０ｇ及び脱イオン
水１．３ｇを添加して撹拌した。このスラリーを、ポリ
ビニルアルコールフィルム（以下、ＰＶＡフィルムと略
す）を敷いた約３０ｃｍ角の型枠中（約３０℃に加温）
に注入し、室温で硬化させることによって、人工大理石
を得た。この人工大理石から、試験用チップを切り出
し、曲げ破断試験、比重測定を実施したところ、比重
１．３（従来のアクリル人工大理石の比重は１．７〜
１．８）、曲げ破断伸度１．７％、破断強度４８ＭＰ
ａ、弾性率４．２ＧＰａであった。しかも得られた人工
大理石は人工大理石特有の優美な外観を有していた。After degassing the obtained mixed slurry in a vacuum vessel, glycol dimercaptoacetate (GD
2.0 g of MA (trade name, manufactured by Yodo Chemical Co., Ltd.) and 1.3 g of deionized water were added and stirred. This slurry is placed in a mold of about 30 cm square on which a polyvinyl alcohol film (hereinafter abbreviated as PVA film) is spread (heated to about 30 ° C.).
And hardened at room temperature to obtain artificial marble. From this artificial marble, a test chip was cut out and subjected to a bending rupture test and a specific gravity measurement. The specific gravity was 1.3 (the specific gravity of the conventional acrylic artificial marble was 1.7 to 1.7).
1.8), elongation at break 1.7%, strength at break 48MP
a, the elastic modulus was 4.2 GPa. Moreover, the obtained artificial marble had an elegant appearance unique to artificial marble.

【００２０】＜実施例２＞ポリ（メチルメタクリレー
ト）とメチルメタクリレート（質量比２：８）から成る
シラップ６３９．２ｇ（総量に対して４６．３％）、水
酸化アルミニウム粉末（ＢＳ−３３、商品名、日本軽金
属（株）製）６２８．５ｇ（総量に対して４５．５
％）、有機中空充填材（マイクロスフェアーＭＦＬ８０
ＧＣＡ、商品名、松本油脂製薬（株））８２．８ｇ（総
量に対して６．０％）、ターシャリーブチルパーオキシ
マレイン酸（パーブチルＭＡ、商品名、日本油脂（株）
製）１２．８ｇ及びジメタクリル酸エチレングリコール
（アクリエステルＥＤ、商品名、三菱レイヨン（株）
製）７．０ｇ（シラップに対して１．１％）を混合し、
ミキサーで撹拌した。Example 2 639.2 g (46.3% based on the total amount) of a syrup composed of poly (methyl methacrylate) and methyl methacrylate (mass ratio 2: 8), aluminum hydroxide powder (BS-33, commercial product) Name, manufactured by Nippon Light Metal Co., Ltd.) 628.5 g (45.5 based on the total amount)
%), An organic hollow filler (Microsphere MFL80)
GCA, trade name, Matsumoto Yushi Seiyaku Co., Ltd.) 82.8 g (6.0% based on the total amount), tertiary butyl peroxymaleic acid (perbutyl MA, trade name, Nippon Oil & Fats Co., Ltd.)
12.8 g) and ethylene glycol dimethacrylate (Acryester ED, trade name, Mitsubishi Rayon Co., Ltd.)
7.0 g (1.1% based on syrup).
Stir with a mixer.

【００２１】得られた混合スラリーを実施例１と同様に
脱泡、再添加、攪拌、及び重合硬化させて人工大理石を
得た。この人工大理石から試験用チップを切り出し、比
重を測定したところ１．１であった。しかも得られた人
工大理石は人工大理石特有の優美な外観を有していた。The obtained mixed slurry was defoamed, re-added, stirred, polymerized and cured in the same manner as in Example 1 to obtain an artificial marble. A test chip was cut out from the artificial marble and the specific gravity was measured and found to be 1.1. Moreover, the obtained artificial marble had an elegant appearance unique to artificial marble.

【００２２】＜実施例３＞ポリ（メチルメタクリレー
ト）とメチルメタクリレート（質量比２：８）から成る
シラップ６３９．２ｇ（総量に対して４６．３％）、水
酸化アルミニウム粉末（ＢＳ−３３、商品名、日本軽金
属（株）製）６００．９ｇ（総量に対して４３．５
％）、有機中空充填材（マイクロスフェアーＭＦＬ８０
ＧＣＡ、商品名、松本油脂製薬（株））１１０．４ｇ
（総量に対して８．０％）、ターシャリーブチルパーオ
キシマレイン酸（パーブチルＭＡ、商品名、日本油脂
（株）製）１２．８ｇ及びジメタクリル酸エチレングリ
コール（アクリエステルＥＤ、商品名、三菱レイヨン
（株）製）７．０ｇ（シラップに対して１．１％）を混
合し、ミキサーで撹拌した。Example 3 639.2 g (46.3% based on the total amount) of a syrup composed of poly (methyl methacrylate) and methyl methacrylate (mass ratio 2: 8), aluminum hydroxide powder (BS-33, commercial product) Name, manufactured by Nippon Light Metal Co., Ltd.) 600.9 g (43.5% of the total weight)
%), An organic hollow filler (Microsphere MFL80)
GCA, trade name, Matsumoto Yushi Seiyaku Co., Ltd.) 110.4 g
(8.0% based on the total amount), 12.8 g of tertiary butyl peroxymaleic acid (Perbutyl MA, trade name, manufactured by NOF Corporation) and ethylene glycol dimethacrylate (Acryester ED, trade name, Mitsubishi) 7.0 g (manufactured by Rayon Co., Ltd.) (1.1% based on syrup) was mixed and stirred with a mixer.

【００２３】得られた混合スラリーを実施例１と同様に
脱泡、再添加、攪拌、及び重合硬化させて人工大理石を
得た。この人工大理石から、試験用チップを切り出し、
比重を測定ところ１．０であった。しかも得られた人工
大理石は人工大理石特有の優美な外観を有していた。The resulting mixed slurry was defoamed, re-added, stirred, and polymerized and cured in the same manner as in Example 1 to obtain an artificial marble. From this artificial marble, cut out test chips,
The specific gravity was measured to be 1.0. Moreover, the obtained artificial marble had an elegant appearance unique to artificial marble.

【００２４】＜比較例１＞ポリ（メチルメタクリレー
ト）とメチルメタクリレート（質量比２：８）から成る
シラップ４６２．３ｇ（総量に対して３３．５％）、水
酸化アルミニウム粉末（ＢＳ−３３、商品名、日本軽金
属（株）製）８９７．０ｇ（総量に対して６５．０
％）、ターシャリーブチルパーオキシマレイン酸（パー
ブチルＭＡ、商品名、日本油脂（株）製）９．２ｇ及び
ジメタクリル酸エチレングリコール（アクリエステルＥ
Ｄ、商品名、三菱レイヨン（株）製）５．１ｇを混合
し、ミキサーで撹拌した。Comparative Example 1 462.3 g (33.5% based on the total amount) of a syrup composed of poly (methyl methacrylate) and methyl methacrylate (mass ratio 2: 8), aluminum hydroxide powder (BS-33, commercial product) Name, manufactured by Nippon Light Metal Co., Ltd.) 897.0 g (65.0 based on the total amount)
%), Tert-butyl peroxymaleic acid (Perbutyl MA, trade name, manufactured by NOF Corporation) 9.2 g, and ethylene glycol dimethacrylate (acrylic ester E)
D, trade name, manufactured by Mitsubishi Rayon Co., Ltd.) (5.1 g) and mixed with a mixer.

【００２５】得られた混合スラリーを実施例１と同様に
脱泡、再添加、攪拌、及び重合硬化させて人工大理石を
得た。この人工大理石から、試験用チップを切り出し、
曲げ破断試験、比重測定を実施したところ、比重１．
７、曲げ破断伸度１．１％、破断強度８２ＭＰａ、弾性
率９．４ＧＰａであり、実施例１〜３で得られた人工大
理石に比べてかなり比重が大きいものであった。The obtained mixed slurry was defoamed, re-added, stirred, polymerized and cured in the same manner as in Example 1 to obtain an artificial marble. From this artificial marble, cut out test chips,
When the bending rupture test and the specific gravity measurement were performed, the specific gravity was 1.
7, the bending elongation at break was 1.1%, the breaking strength was 82 MPa, and the elastic modulus was 9.4 GPa. The specific gravity was considerably larger than the artificial marble obtained in Examples 1 to 3.

【００２６】[0026]

【発明の効果】本発明によれば、メタクリル酸メチルを
主成分とする重合性成分に、無機充填材と有機中空充填
材を併用添加することにより、アクリル人工大理石の特
徴を損なうことなく、加工性及び施工性に優れた軽量人
工大理石を得ることができる。According to the present invention, processing can be carried out without impairing the characteristics of acrylic artificial marble by adding an inorganic filler and an organic hollow filler together to a polymerizable component containing methyl methacrylate as a main component. A lightweight artificial marble excellent in workability and workability can be obtained.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｋ 7/22 Ｃ０８Ｋ 7/22 Ｃ０８Ｌ 33/12 Ｃ０８Ｌ 33/12 //(Ｃ０４Ｂ 26/06 (Ｃ０４Ｂ 26/06 16:08） 16:08） (Ｃ０８Ｌ 33/12 (Ｃ０８Ｌ 33/12 61:04 61:04 27:08 27:08 33:04 33:04 33:20） 33:20） Ｃ０４Ｂ 111:40 Ｃ０４Ｂ 111:40 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08K 7/22 C08K 7/22 C08L 33/12 C08L 33/12 // (C04B 26/06 (C04B 26 / 06 16:08) 16:08) (C08L 33/12 (C08L 33/12 61:04 61:04 27:08 27:08 33:04 33:04 33:20) 33:20) C04B 111: 40 C04B 111: 40

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 メタクリル酸メチルを主成分とする重合
性成分（Ａ）１０〜６５質量％、無機充填材（Ｂ）３０
〜８５質量％、比重が０．０５〜０．７で平均粒径が１
０〜３００μｍである有機中空充填材（Ｃ）０．１〜１
０質量％からなる軽量人工大理石用組成物。1. A polymerizable component (A) containing methyl methacrylate as a main component in an amount of 10 to 65% by mass, and an inorganic filler (B) 30.
85% by mass, specific gravity 0.05-0.7 and average particle size of 1
Organic hollow filler (C) having a thickness of 0 to 300 μm
A composition for lightweight artificial marble comprising 0% by mass. 【請求項２】 メタクリル酸メチルを主成分とする重合
性成分（Ａ）を架橋させる為の架橋剤として、分子内に
２個以上のビニル基を有する架橋性ビニル単量体を更に
含む請求項１記載の軽量人工大理石用組成物。2. A crosslinkable vinyl monomer having two or more vinyl groups in a molecule as a crosslinking agent for crosslinking the polymerizable component (A) containing methyl methacrylate as a main component. 2. The composition for lightweight artificial marble according to 1. 【請求項３】 請求項１又は２記載の組成物を重合硬化
して得られた軽量人工大理石。3. A lightweight artificial marble obtained by polymerizing and curing the composition according to claim 1.
JP2000153333A 2000-05-24 2000-05-24 Composition for lightweight artificial marble, and lightweight artificial marble Withdrawn JP2001335382A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004026602A (en) * 2002-06-27 2004-01-29 Toppan Forms Co Ltd Microcapsule for forming porous body, composition for forming porous body, porous body, and method for manufacturing porous body
JP2006082986A (en) * 2004-09-14 2006-03-30 Yamaha Livingtec Corp Resin molded article
JP2007001224A (en) * 2005-06-27 2007-01-11 Matsushita Electric Works Ltd Artificial marble and its manufacturing method
JP2007031184A (en) * 2005-07-25 2007-02-08 Matsushita Electric Works Ltd Resin composition for artificial marble
WO2010025995A1 (en) 2008-09-05 2010-03-11 Blanco Gmbh + Co Kg Curable casting compound for the production of plastic molded parts
EP1904416A4 (en) * 2005-05-30 2011-03-23 Cheil Ind Inc Composition for artificial marble having natural pattern
WO2015122174A1 (en) * 2014-02-14 2015-08-20 株式会社クラレ Methacrylic resin and molded article
WO2020207541A1 (en) * 2019-04-11 2020-10-15 Blanco Gmbh + Co Kg Curable casting compound for the production of plastic molded parts

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004026602A (en) * 2002-06-27 2004-01-29 Toppan Forms Co Ltd Microcapsule for forming porous body, composition for forming porous body, porous body, and method for manufacturing porous body
JP2006082986A (en) * 2004-09-14 2006-03-30 Yamaha Livingtec Corp Resin molded article
JP4546194B2 (en) * 2004-09-14 2010-09-15 ヤマハリビングテック株式会社 Resin molding
EP1904416A4 (en) * 2005-05-30 2011-03-23 Cheil Ind Inc Composition for artificial marble having natural pattern
JP4561495B2 (en) * 2005-06-27 2010-10-13 パナソニック電工株式会社 Artificial marble and its manufacturing method
JP2007001224A (en) * 2005-06-27 2007-01-11 Matsushita Electric Works Ltd Artificial marble and its manufacturing method
JP2007031184A (en) * 2005-07-25 2007-02-08 Matsushita Electric Works Ltd Resin composition for artificial marble
WO2010025995A1 (en) 2008-09-05 2010-03-11 Blanco Gmbh + Co Kg Curable casting compound for the production of plastic molded parts
US8247476B2 (en) 2008-09-05 2012-08-21 Blanco Gmbh + Co Kg Curable casting compound for manufacturing plastic moulded parts
RU2509092C2 (en) * 2008-09-05 2014-03-10 Бланко Гмбх+Ко Кг Curable filling compound for making formed parts from plastic
WO2015122174A1 (en) * 2014-02-14 2015-08-20 株式会社クラレ Methacrylic resin and molded article
JPWO2015122174A1 (en) * 2014-02-14 2017-03-30 株式会社クラレ Methacrylic resin and molded products
WO2020207541A1 (en) * 2019-04-11 2020-10-15 Blanco Gmbh + Co Kg Curable casting compound for the production of plastic molded parts
CN113825789A (en) * 2019-04-11 2021-12-21 铂浪高公司 Hardenable casting material for producing moulded plastic parts
US20220213289A1 (en) * 2019-04-11 2022-07-07 Blanco Gmbh + Co Kg Hardenable casting compound for producing molded plastic components

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