JP3439848B2 - Impact resistant styrenic resin molded product with excellent gloss - Google Patents
Impact resistant styrenic resin molded product with excellent glossInfo
- Publication number
- JP3439848B2 JP3439848B2 JP25823994A JP25823994A JP3439848B2 JP 3439848 B2 JP3439848 B2 JP 3439848B2 JP 25823994 A JP25823994 A JP 25823994A JP 25823994 A JP25823994 A JP 25823994A JP 3439848 B2 JP3439848 B2 JP 3439848B2
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- Japan
- Prior art keywords
- impact
- resin
- rubber
- dispersed
- weight
- 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 - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、優れた物性バランス
（特に衝撃強度と光沢度と剛性）を有する耐衝撃性スチ
レン系樹脂成型品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact resistant styrene resin molded article having an excellent balance of physical properties (particularly impact strength, gloss and rigidity).
【０００２】[0002]
【従来の技術】現在、スチレン系樹脂の耐衝撃性を改善
する目的で樹脂中にゴム状重合体を分散粒子として含有
したゴム変成スチレン系樹脂（耐衝撃性スチレン系樹
脂）が大量に製造され、その製品は成形加工品として広
く使用されている。近年かかる製品の需要分野が拡大
し、従来以上の物性バランスが要求されてきている。射
出成型用の耐衝撃性スチレン系樹脂に要求される物性の
なかで特に重要なものは、衝撃強度と光沢度と剛性の３
つである。耐衝撃性スチレン系樹脂は、樹脂中にゴム状
重合体を分散させることにより衝撃強度が改良されてい
る。しかしゴム状重合体を分散させると樹脂の表面に凹
凸が発生し、樹脂の光沢度が悪くなる。この傾向は、分
散ゴム状重合体の大きさが大きくなるとより顕著とな
る。また、ゴム状重合体を分散させると、樹脂の剛性も
低下する。このように、衝撃強度と光沢度や剛性は、相
反する物性値であり、これらの物性のバランスがよくと
れた耐衝撃性スチレン系樹脂を製造することは、非常に
困難である。一方、最近衝撃強度と光沢度や剛性とのバ
ランスを改良する目的で分散ゴム粒子の粒子径分布がバ
イモーダル分布（大粒子と小粒子が存在）の耐衝撃性ス
チレン系樹脂が提案されている。しかしこれらのバイモ
ーダル分布を有する耐衝撃性スチレン系樹脂の重合は、
その粒子径の制御が非常に困難であるという問題があっ
た。2. Description of the Related Art At present, a large amount of rubber-modified styrene resin (impact-resistant styrene resin) containing a rubber-like polymer as dispersed particles in the resin is manufactured for the purpose of improving the impact resistance of styrene resin. , Its products are widely used as molded products. In recent years, the field of demand for such products has expanded, and there has been a demand for a better physical property balance than before. Among the physical properties required for impact-resistant styrene resin for injection molding, the three most important properties are impact strength, gloss and rigidity.
Is one. Impact strength styrene-based resins have improved impact strength by dispersing a rubber-like polymer in the resin. However, when the rubber-like polymer is dispersed, unevenness is generated on the surface of the resin, and the glossiness of the resin deteriorates. This tendency becomes more remarkable as the size of the dispersed rubber-like polymer increases. Further, when the rubber-like polymer is dispersed, the rigidity of the resin is also reduced. As described above, the impact strength, the glossiness, and the rigidity are contradictory physical property values, and it is very difficult to produce an impact resistant styrene-based resin having a well-balanced physical property. On the other hand, recently, an impact-resistant styrene-based resin having a bimodal distribution of dispersed rubber particles (large particles and small particles exist) has been proposed for the purpose of improving the balance between impact strength and gloss or rigidity. . However, the polymerization of impact-resistant styrenic resins having these bimodal distributions
There is a problem that it is very difficult to control the particle size.
【０００３】[0003]
【発明が解決しようとする課題】本発明は先に述べた、
衝撃強度と光沢度と剛性の物性バランスの優れた安価な
耐衝撃性スチレン系樹脂成型物を得ることを目的とする
ものである。The present invention has been described above.
The object of the present invention is to obtain an inexpensive impact-resistant styrene-based resin molded product having an excellent balance of physical properties such as impact strength, glossiness and rigidity.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、鋭意研究
を重ねた結果、特定の組成を有する耐衝撃性スチレン系
樹脂ペレットに、特定の組成を有する耐衝撃性スチレン
系樹脂をベースとしたカラーマスターバッチペレットを
ドライブレドし射出成型することにより衝撃強度と光沢
度と剛性の物性バランスの優れた安価な耐衝撃性スチレ
ン系樹脂成型品が容易に得られることを見出し本発明に
至った。As a result of intensive studies, the present inventors have found that impact-resistant styrene-based resin pellets having a specific composition are based on impact-resistant styrene-based resin pellets having a specific composition. It was found that an inexpensive impact-resistant styrene-based resin molded product having an excellent balance of physical properties of impact strength, glossiness and rigidity can be easily obtained by dry-driing the color masterbatch pellet .
【０００５】すなわち、本発明は、（Ａ）体積平均粒子
径が０．８μｍ以下のゴム状物質が粒子状に分散してい
る耐衝撃性スチレン系樹脂（１）ペレット１００重量部
と、（Ｂ）体積平均粒子径が１〜５μｍのゴム状物質が
粒子状に分散している耐衝撃性スチレン系樹脂（２）５
０〜９５重量％と着色剤１０〜５０重量％、分散剤１〜
１０重量部からなる耐衝撃性スチレン系樹脂カラーマス
ターバッチペレット１〜２０重量部、をドライブレンド
し直接射出成形してなる光沢の優れた耐衝撃性スチレン
系樹脂成形品である。That is, the present invention comprises (A) 100 parts by weight of an impact-resistant styrenic resin (1) pellet in which a rubber-like substance having a volume average particle size of 0.8 μm or less is dispersed in a particulate form; ) Impact-resistant styrenic resin (2) 5 in which a rubber-like substance having a volume average particle diameter of 1 to 5 μm is dispersed in particles
0-95% by weight, colorant 10-50% by weight, dispersant 1-
It is an impact-resistant styrene-based resin molded article having an excellent gloss, which is obtained by dry blending 10 parts by weight of the impact-resistant styrene-based resin color masterbatch pellets 1 to 20 parts by weight and directly injection molding.
【０００６】前記耐衝撃性スチレン系樹脂（１）中の分
散ゴム粒子の数平均粒子径（Ｌｎ）と体積平均粒子径
（Ｌｖ）との比（Ｌｖ／Ｌｎ）が２以下である。The ratio (Lv / Ln) of the number average particle diameter (Ln) and the volume average particle diameter (Lv) of the dispersed rubber particles in the impact resistant styrene resin (1) is 2 or less.
【０００７】前記耐衝撃性スチレン系樹脂（１）の分散
ゴム相の体積分率（ＲＰＶＦ）が３０〜６０％でかつ耐
衝撃性スチレン系樹脂（２）の分散ゴム相の体積分率
（ＲＰＶＦ）が１５〜４５％である。The impact-resistant styrene resin (1) has a dispersed rubber phase volume fraction (RPVF) of 30 to 60% and the impact-resistant styrene resin (2) has a dispersed rubber phase volume fraction (RPVF). ) Is 15 to 45%.
【０００８】本発明に用いる耐衝撃性スチレン系樹脂
は、ゴム状重合体の存在下に芳香族モノビニル単量体を
重合せしめる塊状重合法または塊状懸濁重合法にて製造
することができる。本発明で特定されたミクロ構造を有
する耐衝撃性スチレン系樹脂は、重合工程に於ける攪拌
機の回転数や使用するゴム状重合体の分子量（粘度）な
どをコントロールすることにより製造することができ
る。その他には、重合により得られれた２種類以上の耐
衝撃性スチレン系樹脂のブレンド或いは、耐衝撃性スチ
レン系樹脂とホモポリスチレン樹脂とのブレンドによっ
ても製造してもよい。芳香族モノビニル単量体として
は、スチレン及びｏ−メチルスチレン、ｐ−メチルスチ
レン、ｍ−メチルスチレン、２，４ジメチルスチレン、
エチルスチレン、ｐ−ｔｅｒｔ−ブチルスチレン等のア
ルキル置換スチレン、α−メチルスチレン、α−メチル
−ｐ−メチルスチレン等α−アルキルスチレンな等が用
いられる。ゴム状重合体としては、ポリブタジエン、ス
チレン−ブタジエン共重合体等であり、ポリブタジエン
としてはシス含有量の高いハイシスポリブタジエン、シ
ス含有量の低いローシスポリブタジエンともに用いるこ
とができる。The impact resistant styrene resin used in the present invention can be produced by a bulk polymerization method or a bulk suspension polymerization method in which an aromatic monovinyl monomer is polymerized in the presence of a rubbery polymer. The impact-resistant styrenic resin having the microstructure specified in the present invention can be produced by controlling the rotation speed of the stirrer in the polymerization step and the molecular weight (viscosity) of the rubber-like polymer used. . Alternatively, it may be produced by blending two or more kinds of impact-resistant styrene-based resins obtained by polymerization or a blend of impact-resistant styrene-based resin and homopolystyrene resin. Aromatic monovinyl monomers include styrene and o-methylstyrene, p-methylstyrene, m-methylstyrene, 2,4 dimethylstyrene,
Alkyl-substituted styrenes such as ethyl styrene and p-tert-butyl styrene, and α-alkyl styrenes such as α-methyl styrene and α-methyl-p-methyl styrene are used. Examples of the rubbery polymer include polybutadiene and styrene-butadiene copolymer. As the polybutadiene, both high cis polybutadiene having a high cis content and low cis polybutadiene having a low cis content can be used.
【０００９】本発明の耐衝撃性スチレン系樹脂（１）に
おける粒子状に分散したゴム状重合体の体積平均粒子径
は０．８μｍ以下、好ましくは０．５μｍ以下であり
０．８μｍを越えると最終成型品の光沢は悪くなる。ま
たその分散ゴム粒子の粒子径分布（Ｌｖ／Ｌｎ）は２以
下が好ましい。Ｌｖ／Ｌｎが２を越えると（すなわち、
粒子径が大きなゴム粒子が存在すると）光沢度が悪くな
る。ＲＰＶＦについては、３０〜６０％が好ましい。６
０％を越えると最終樹脂成型品の光沢が悪くなり剛性が
低くなる。また３０％未満になると衝撃強度が低くな
る。The volume average particle diameter of the rubber-like polymer dispersed in the impact-resistant styrenic resin (1) of the present invention is 0.8 μm or less, preferably 0.5 μm or less and more than 0.8 μm. The gloss of the final molded product becomes poor. The particle size distribution (Lv / Ln) of the dispersed rubber particles is preferably 2 or less. When Lv / Ln exceeds 2 (that is,
The presence of rubber particles having a large particle size leads to poor gloss. About RPVF, 30-60% is preferable. 6
When it exceeds 0%, the gloss of the final resin molded product becomes poor and the rigidity becomes low. If it is less than 30%, the impact strength will be low.
【００１０】カラーマスターバッチのベース樹脂である
耐衝撃性スチレン系樹脂（２）における粒子状に分散し
たゴム状重合体の体積平均粒子径は１〜５μｍ、好まし
くは１〜３μｍである。粒子径が大きすぎると最終樹脂
成型品の光沢が悪くなり剛性が低くなる。また反対に小
さすぎると衝撃強度が低くなる。そのＲＰＶＦについて
は、１５〜４５％が好ましい。４５％を越えると最終樹
脂成型品の光沢が悪くなり剛性が低くなる。また１５％
未満になると衝撃強度が低くなる。The volume average particle size of the rubber-like polymer dispersed in particles in the impact resistant styrene resin (2) which is the base resin of the color masterbatch is 1 to 5 μm, preferably 1 to 3 μm. If the particle size is too large, the final resin molded product will have poor gloss and low rigidity. On the other hand, if it is too small, the impact strength will be low. The RPVF is preferably 15 to 45%. When it exceeds 45%, the gloss of the final resin molded product becomes poor and the rigidity becomes low. 15% again
If it is less than 100, the impact strength will be low.
【００１１】カラーマスターバッチの配合量は耐衝撃性
スチレン系樹脂（１）ペレット１００重量部に対し、１
〜２０重量部である。配合量が少なすぎると最終樹脂成
型品の衝撃強度が低くなる。また多すぎる（２０重量部
を越える）と最終樹脂成型品の光沢が悪くなり剛性が低
くなるここでいう平均粒子径とは、数平均粒子径と体積
平均粒子径である。その値は、耐衝撃性スチレン系樹脂
の超薄切片法による透過型電子顕微鏡写真を撮影し、写
真中の分散ゴム相粒子１０００個以上の粒子径を測定
し、次式により算出したものである。超薄切片の厚み
は、５０〜１００ｎｍである。The compounding amount of the color masterbatch is 1 with respect to 100 parts by weight of the impact resistant styrene resin (1) pellets.
~ 20 parts by weight. If the blending amount is too small, the impact strength of the final resin molded product will be low. If the amount is too large (exceeds 20 parts by weight), the gloss of the final resin molded product becomes poor and the rigidity becomes low. The average particle size as used herein is the number average particle size and the volume average particle size. The value is calculated by taking the transmission electron microscope photograph of the impact resistant styrene resin by the ultra-thin section method, measuring the particle size of 1000 or more dispersed rubber phase particles in the photograph, and calculating by the following formula. . The ultrathin section has a thickness of 50 to 100 nm.
【００１２】数平均粒子径＝ΣｎｉＤｉ／Σｎｉ
体積平均粒子径＝ΣｎｉＤｉ4 ／ΣｎｉＤｉ3
（ここにｎｉは粒子径Ｄｉの分散ゴム相粒子の個数であ
る。）
分散ゴム相粒子の平均粒子径やゴム相体積分率は、ゴム
重合時の攪拌速度や用いるゴムの溶液粘度等に左右さ
れ、これを変更することによって調整することが出来
る。ここでいうゴム相体積分率（ＲＰＶＦ）とは、内部
にオクルードされたポリスチレン系樹脂も含むゴム分散
相全体の体積（ＲＰＶ：Ｒｕｂｂｅｒ ｐｈａｓｅｖｏ
ｌｕｍｅ）の樹脂全体に対する体積分率（Ｖｏｌｕｍｅ
ｆｒａｃｔｉｏｎ）である。その値は、上記平均粒子
径と同様にスチレン系樹脂の超薄切片法による透過型電
子顕微鏡写真を撮影し、写真中のある特定の範囲を設定
しその領域の全面積に対する、その領域内に存在するゴ
ム相の面積分率を画像処理装置を用いることにより評価
したものである。 分散ゴム相粒子の平均粒子径やゴム
相体積分率は、ゴム重合時の攪拌速度や用いるゴムの溶
液粘度等に左右され、これを変更することによって調整
することが出来る。本発明に使用する着色剤はスチレン
系樹脂に使用できる有機、無機の染料や顔料であればど
のような物でも良い。添加量は１０〜５０重量％の範囲
で選択すれば良い、１０重量％未満であればカラーマス
ターバッチペレットの添加量が多くなり成形品の物性の
バランスが悪くなる、５０重量％を越えるとカラーマス
ターバッチペレットの添加量が少なくなり成形品の物性
のバランスが悪くなる。Number average particle diameter = ΣniDi / Σni Volume average particle diameter = ΣniDi 4 / ΣniDi 3 (where ni is the number of dispersed rubber phase particles having the particle diameter Di). Average particle diameter of dispersed rubber phase particles and rubber. The phase volume fraction depends on the stirring speed during rubber polymerization, the solution viscosity of the rubber used, and the like, and can be adjusted by changing this. The rubber phase volume fraction (RPVF) referred to here is the volume of the entire rubber dispersed phase (RPV: Ruber phasevo) including the polystyrene resin occluded therein.
volume of the resin to the entire resin (Volume)
Fraction). The value is a transmission electron microscope photograph taken by the ultra-thin section method of the styrene-based resin in the same manner as the average particle diameter, and a certain range in the photograph is set to the total area of that region, within that region. The area fraction of the existing rubber phase was evaluated by using an image processing device. The average particle size of the dispersed rubber phase particles and the rubber phase volume fraction depend on the stirring speed during rubber polymerization, the solution viscosity of the rubber used, and the like, and can be adjusted by changing these. The colorant used in the present invention may be any organic or inorganic dye or pigment that can be used in the styrene resin. The addition amount may be selected in the range of 10 to 50% by weight. If the addition amount is less than 10% by weight, the addition amount of color masterbatch pellets will be large and the physical properties of the molded product will be unbalanced. The amount of masterbatch pellets added is reduced, and the physical properties of the molded product are unbalanced.
【００１３】本発明に使用する分散剤は染顔料の２次凝
集を防ぐものであり例えば金属石鹸、脂肪酸アミド、ワ
ックス類などである。添加量としては１〜１０重量％で
あり、１重量％未満では染顔料の分散が悪い、１０重量
％を越えると成形品の物性のバランスが悪くなる。The dispersant used in the present invention prevents secondary aggregation of dyes and pigments, and is, for example, metal soap, fatty acid amide, waxes and the like. The addition amount is from 1 to 10% by weight. When it is less than 1% by weight, the dispersion of dyes and pigments is poor, and when it exceeds 10% by weight, the balance of physical properties of the molded product is deteriorated.
【００１４】カラーマスターペレットの製造方法は耐衝
撃性スチレン系樹脂（２）、着色剤、分散剤、或いは着
色剤と分散剤とを予め混合した物と耐衝撃性スチレン系
樹脂（１）とをヘンセルミキサーやタンブラーミキサー
などの混合機で混合して後バンバリーミキサー、ロー
ル、コニーダや１軸、２軸押出機などの溶融混練機で溶
融混練することによって製造することができる。The color master pellets are produced by using the high-impact styrenic resin (2), the colorant, the dispersant, or a mixture of the colorant and the dispersant, and the high-impact styrene resin (1). It can be produced by mixing with a mixer such as a Henschel mixer or a tumbler mixer, and then melt-kneading with a melt-kneader such as a Banbury mixer, a roll, a co-kneader or a single-screw or twin-screw extruder.
【００１５】すなわち本発明は、小さな粒子径の分散ゴ
ム粒子を有する耐衝撃性スチレン系樹脂ペレットに、大
きな粒子径の分散ゴム粒子を有する耐衝撃性スチレン系
樹脂をベースとしたカラーマスターペレットをドライブ
レンドし、射出成型することにより、容易にバイモーダ
ルゴム粒子径分布を有する耐衝撃性スチレン系樹脂成型
品を得ることができ、その成型品は衝撃強度と光沢度と
剛性の物性バランスの優れたものとなるということを見
出だしたものである。That is, according to the present invention, an impact-resistant styrene resin pellet having dispersed rubber particles having a small particle size and a color master pellet based on impact-resistant styrene resin having dispersed rubber particles having a large particle diameter are dried. By blending and injection molding, it is possible to easily obtain an impact resistant styrene resin molded product having a bimodal rubber particle size distribution, and the molded product has an excellent balance of physical properties such as impact strength, glossiness and rigidity. It was discovered that it would become a thing.
【００１６】本発明における樹脂成形品には、必要によ
り各種添加剤を配合することができる。各種添加剤と
は、ブロム系、塩素系、リン系、無機系などの難燃剤
や、ベンゾトリアゾール系化合物、ベンゾフェノン系化
合物、サリチル酸フェニル化合物などの紫外線吸収剤や
ヒンダードアミン系安定剤や、フェノール系、リン系の
酸化防止剤や、スズ系、エポキシ系などの熱安定剤や金
属石鹸、ワックス、脂肪酸アミド、高級脂肪酸などの滑
剤や、ポリジメチルシロキサンなどのしゅう動性改良剤
等があげられる。If desired, various additives can be added to the resin molded product of the present invention. With various additives, bromine-based, chlorine-based, phosphorus-based, flame retardants such as inorganic, benzotriazole-based compounds, benzophenone-based compounds, ultraviolet absorbers such as phenyl salicylate compounds and hindered amine-based stabilizers, phenol-based, Examples thereof include phosphorus-based antioxidants, heat stabilizers such as tin-based and epoxy-based stabilizers, lubricants such as metal soap, wax, fatty acid amides and higher fatty acids, and sliding modifiers such as polydimethylsiloxane.
【００１７】[0017]
【実施例】以下実施例によって本発明を詳しく説明する
が、本発明はこれらの例によって何ら限定されるもので
はない。また以下の測定方法によって各種物性値を測定
した。テストピースは全てシリンダー温度２２０金型温
度６０℃の条件で射出成型により作成した。The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. Further, various physical property values were measured by the following measuring methods. All test pieces were prepared by injection molding under the conditions of a cylinder temperature of 220 and a mold temperature of 60 ° C.
【００１８】（１）アイゾット衝撃強度：ＪＩＳ Ｋ６
８７１に準じて測定
（２）デュポン衝撃強度：カラープレートを成型し、１
／２インチ径のポンチを使用し、１００ｇ或いは１ｋｇ
のおもりを用いて評価した。(1) Izod impact strength: JIS K6
Measured according to 871 (2) DuPont impact strength: 1)
Using a 1/2 inch diameter punch, 100g or 1kg
The weight was used for evaluation.
【００１９】（３）表面光沢：２点ピンゲートで１００
ｍｍ×３５０ｍｍ×２ｍｍの平板を成型し、ゲート近傍
の点（Ａ）、成型品末端（Ｂ）の２点でＪＩＳ Ｚ８７
４１に準じ光沢度を測定した。(3) Surface gloss: 100 with a 2-point pin gate
A flat plate of mm × 350 mm × 2 mm is molded, and JIS Z87 is used at two points, a point (A) near the gate and a molded product end (B).
The glossiness was measured according to No. 41.
【００２０】（４）表面外観：上記平板の表面状態を目
視で観察し評価。(4) Surface appearance: The surface condition of the flat plate was visually observed and evaluated.
【００２１】実施例１〜２及び比較例１〜４
スチレンモノマーにポリブタジエン或いはスチレン−ブ
タジエン共重合体を溶解した溶液を撹拌下で重合を行っ
た。重合工程に於ける攪拌機の回転数や使用するポリブ
タジエンの配合量や分子量（粘度）などをコントロール
することにより種々のモルフォロジーを有するゴム変成
ポリスチレン（１−ａ，１−ｂ，１−ｃ，２−ａ，２−
ｂ，２−ｃ）を得た。そのモルフォロジー（分散ゴム相
粒子径、ＲＰＶＦ）を上記測定方法で評価した。その結
果を表１に記す。２−ａ〜２−ｃを用い表２の処方配合
でブレンドし、２軸押出機で２２０℃で溶融混練し、カ
ラーマスターバッチペレット（３−ａ，３−ｂ，３−
ｃ）を得た。ゴム変成スチレンペレット（１−ａ，１−
ｂ，１−ｃ）とカラーマスターバッチペレット（３−
ａ，３−ｂ，３−ｃ）を表３に示した配合でドライブレ
ンドし、上記条件で射出成型した。その評価結果を表３
に記す。The polymerization was carried out under stirring, a solution of the butadiene copolymer - The real施例1-2 and polybutadiene or styrene Comparative Example 1-4 Styrene monomer. Rubber-modified polystyrene (1-a, 1-b, 1-c, 2- having various morphologies by controlling the number of revolutions of a stirrer in the polymerization step, the compounding amount of polybutadiene used, the molecular weight (viscosity), etc. a, 2-
b, 2-c) was obtained. The morphology (dispersed rubber phase particle diameter, RPVF) was evaluated by the above measuring method. The results are shown in Table 1. 2-a to 2- c were blended according to the formulation shown in Table 2, melt-kneaded at 220 ° C in a twin-screw extruder, and color master batch pellets (3-a, 3-b, 3-
c) was obtained. Rubber modified styrene pellets (1-a, 1-
b, 1-c) and color masterbatch pellets (3-
a, 3-b, 3-c) were dry-blended with the formulations shown in Table 3 and injection-molded under the above conditions. Table 3 shows the evaluation results.
Note.
【００２２】[0022]
【表１】 [Table 1]
【表２】 [Table 2]
【表３】 [Table 3]
Claims (2)
以下のゴム状物質が粒子状に分散している耐衝撃性スチ
レン系樹脂（１）ペレット１００重量部と、（Ｂ）体積
平均粒子径が１〜５ミクロンのゴム状物質が粒子状に分
散している耐衝撃性スチレン系樹脂（２）５０〜９５重
量％と着色剤１０〜５０重量％、分散剤１〜１０重量％
からなる耐衝撃性スチレン系樹脂カラーマスターバッチ
ペレット１〜２０重量部との混合物を射出成形してなる
樹脂成形品であって、前記耐衝撃性スチレン系樹脂
（１）中の分散ゴム粒子の数平均粒子径（Ｌｎ）と体積
平均粒子径（Ｌｖ）との比（Ｌｖ／Ｌｎ）が２以下であ
る光沢の優れた耐衝撃性スチレン系樹脂成形品。1. An impact-resistant styrenic resin (1) 100 parts by weight of pellets (A) in which a rubber-like substance having a volume average particle diameter of 0.8 micron or less is dispersed in particles, and (B) a volume average. Impact-resistant styrenic resin (2) in which a rubber-like substance having a particle diameter of 1 to 5 microns is dispersed in particles, 50 to 95% by weight, a colorant 10 to 50% by weight, and a dispersant 1 to 10% by weight.
Impact-resistant styrenic resin color masterbatch consisting of 1 to 20 parts by weight of a mixture is injection-molded
A molded resin product, the impact-resistant styrene resin
(1) Number average particle diameter (Ln) and volume of dispersed rubber particles in
Ratio (Lv / Ln) with average particle diameter (Lv) is 2 or less
Gloss excellent impact styrene resin molded article that.
ム相の体積分率（ＲＰＶＦ）が３０〜６０％でかつ耐衝
撃性スチレン系樹脂（２）の分散ゴム相の体積分率（Ｒ
ＰＶＦ）が１５〜４５％である請求項１記載の光沢の優
れた耐衝撃性スチレン系樹脂成形品。2. The volume fraction (RPVF) of the dispersed rubber phase of the impact resistant styrene resin (1) is 30 to 60% and the volume fraction (RPF) of the dispersed rubber phase of the impact resistant styrene resin (2) ( R
PVF) is claim 1 Symbol placement of gloss superior impact styrene resin molded product 15 to 45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25823994A JP3439848B2 (en) | 1994-10-24 | 1994-10-24 | Impact resistant styrenic resin molded product with excellent gloss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25823994A JP3439848B2 (en) | 1994-10-24 | 1994-10-24 | Impact resistant styrenic resin molded product with excellent gloss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08120154A JPH08120154A (en) | 1996-05-14 |
| JP3439848B2 true JP3439848B2 (en) | 2003-08-25 |
Family
ID=17317466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25823994A Expired - Lifetime JP3439848B2 (en) | 1994-10-24 | 1994-10-24 | Impact resistant styrenic resin molded product with excellent gloss |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3439848B2 (en) |
-
1994
- 1994-10-24 JP JP25823994A patent/JP3439848B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08120154A (en) | 1996-05-14 |
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