JPH07107116B2 - Polypropylene resin composition - Google Patents
Polypropylene resin compositionInfo
- Publication number
- JPH07107116B2 JPH07107116B2 JP61289515A JP28951586A JPH07107116B2 JP H07107116 B2 JPH07107116 B2 JP H07107116B2 JP 61289515 A JP61289515 A JP 61289515A JP 28951586 A JP28951586 A JP 28951586A JP H07107116 B2 JPH07107116 B2 JP H07107116B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- resin composition
- present
- propylene
- 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.)
- Expired - Fee Related
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は自動車、弱電製品等の工業用成形材料に用いる
機械的強度及び寸法安定性に優れた無機繊維充填熱可塑
性樹脂組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an inorganic fiber-filled thermoplastic resin composition having excellent mechanical strength and dimensional stability, which is used for industrial molding materials such as automobiles and light electrical appliances. is there.
［従来の技術］ ポリプロピレンに無機フィラーを配合した複合樹脂組成
物は、剛性機械的強度、成形収縮率などの各種の利点に
より幅広く工業材料分野に使用されている。なかでも繊
維状充填剤で強化したものは、機械的強度の向上が大き
いので好んで使用されている。しかし、ガラス繊維のよ
うに繊維長の長いものを該樹脂に充填すると、表面荒れ
が起こるので外観上好ましくなく、その上、反り等に関
するの寸法安定性が悪くなる欠点を有し、また、ウォラ
ストナイトのように短繊維のものを充填すると剛性の改
良効果が小さいという欠点を有していた。[Prior Art] A composite resin composition in which an inorganic filler is mixed with polypropylene is widely used in the field of industrial materials due to various advantages such as rigidity and mechanical strength and molding shrinkage. Among them, those reinforced with a fibrous filler are preferred because they have a large improvement in mechanical strength. However, when a resin having a long fiber length, such as glass fiber, is filled in the resin, the surface is roughened, which is not preferable in terms of appearance, and further, there is a defect that the dimensional stability with respect to warpage is deteriorated. When a short fiber such as rustite is filled, it has a drawback that the effect of improving rigidity is small.
この短繊維充填剤の欠点を改良するため特開昭57−1098
46号公報に示されるような繊維状マグネシウム・オキシ
サルフェートを配合する方法が提案されているが、上記
の機械的強度の改良は充分ではない。To improve the shortcomings of this short fiber filler, JP-A-57-1098
Although a method of blending fibrous magnesium oxysulfate as shown in Japanese Patent No. 46 has been proposed, the above-mentioned improvement of mechanical strength is not sufficient.
［発明が解決しようとする問題点］ 本発明は、寸法安定性及び外観が良好で、剛性、耐衝撃
性などの機械的強度が大きい繊維状無機充填剤入りのポ
リプロピレン樹脂組成物を提供することを目的とするも
のである。[Problems to be Solved by the Invention] The present invention provides a polypropylene resin composition containing a fibrous inorganic filler, which has good dimensional stability and appearance, and has high mechanical strength such as rigidity and impact resistance. The purpose is.
［問題点を解決するための手段］ 本発明者らは、短繊維充填剤入り組成物の上記欠点を改
良すべく検討した結果、特定のポリプロピレンに特定形
状の短繊維充填剤を組み合わせることにより、表面光沢
及び寸法安定性が良好で、剛性及び耐衝撃性が改善され
た組成物が得られることを見い出し本発明をなすに至っ
た。[Means for Solving Problems] The present inventors have studied to improve the above-mentioned drawbacks of a composition containing a short fiber filler, and as a result, by combining a specific polypropylene with a short fiber filler having a specific shape, It was found that a composition having good surface gloss and dimensional stability and improved rigidity and impact resistance was obtained, and the present invention was completed.
すなわち、本発明は、（Ａ）アイソタクチックペンタッ
ド分率が95％以上のプロピレンの重合体60〜99重量％、
及び（Ｂ）0.1〜2.0μｍの繊維径で、かつ60〜200のア
スペクト比を有するマグネシウム系繊維状無機充填剤１
〜40重量％からなるポリプロピレン樹脂組成物である。That is, the present invention relates to (A) a propylene polymer having an isotactic pentad fraction of 95% or more of 60 to 99% by weight,
And (B) a magnesium-based fibrous inorganic filler 1 having a fiber diameter of 0.1 to 2.0 μm and an aspect ratio of 60 to 200
It is a polypropylene resin composition consisting of -40% by weight.
本発明に使用されるプロピレン重合体は、アイソタクチ
ックペンタッド分率が95％以上のものであればどのよう
なプロピレン重合体であってもよく、このような重合体
は、重合時に使用する触媒や触媒の予備処理に使用する
モノマー種類等を適宜選択することにより製造できる。The propylene polymer used in the present invention may be any propylene polymer having an isotactic pentad fraction of 95% or more. Such a polymer is used at the time of polymerization. It can be produced by appropriately selecting the catalyst and the kind of monomer used for the pretreatment of the catalyst.
アイソタクチックペンタッド分率とは、５個のプロピレ
ンモノマー単位が連続してメソ結合している連鎖の中心
のプロピレン単位が全プロピレン単位に対する割合を百
分率で表わしたものであり、ポリプロピレン分子の立体
規則性の尺度である。The isotactic pentad fraction is a ratio of the propylene unit at the center of a chain in which five propylene monomer units are continuously meso-bonded to the total propylene unit, and is expressed as a percentage. It is a measure of regularity.
このような高いアイソタクチックペンタッド分率のプロ
ピレン重合体を得る方法としては、例えば、特開昭61−
155404号公報記載の方法のようにチーグラー型の立体規
則性重合能の高い触媒を、４−メチルペンテン−１等の
モノマーで予備重合処理したものを用いプロピレンを重
合する方法がある。A method for obtaining such a propylene polymer having a high isotactic pentad fraction is described in, for example, JP-A-61-
There is a method in which propylene is polymerized by using a catalyst having a high stereoregular polymerization ability of Ziegler type, which is prepolymerized with a monomer such as 4-methylpentene-1 as described in JP-A-155404.
本発明に用いるプロピレン重合体として、上記の重合反
応系内に、プロピレン以外のα−オレフィン例えばエチ
レン等の他のモノマーを使用して１段重合又は２段重合
で共重合し、該他モノマーが全樹脂量の７重量％以下の
含有量となるようにしたランダン共重合体又は耐衝撃性
ポリプロピレン（通称ブロック共重合体という）を使用
すると、さらに耐衝撃強度を向上しうるので好ましい。As the propylene polymer used in the present invention, an α-olefin other than propylene, for example, another monomer such as ethylene is used in the above-mentioned polymerization reaction system, and copolymerized by one-step polymerization or two-step polymerization. It is preferable to use a landan copolymer or impact-resistant polypropylene (commonly referred to as a block copolymer) having a content of 7% by weight or less based on the total amount of resin, because impact strength can be further improved.
本発明に用いる繊維状無機充填剤は0.1〜２μｍの繊維
径で、かつ、60〜200のアスペクト比を有することが必
要である。The fibrous inorganic filler used in the present invention must have a fiber diameter of 0.1 to 2 μm and an aspect ratio of 60 to 200.
繊維径が0.1μ以下になると充填剤の嵩比重が小さくな
り過ぎて、配合操作が困難となり、繊維径が２μ以上で
は、成形品の表面外観が不良となり、また、アスペクト
比が60未満では組成物の強度の向上が十分でないし、ま
た200を超えると寸法安定性及び外観が悪くなる。If the fiber diameter is 0.1μ or less, the bulk specific gravity of the filler becomes too small, which makes the blending operation difficult, and if the fiber diameter is 2μ or more, the surface appearance of the molded product becomes poor, and if the aspect ratio is less than 60, the composition is low. If the strength of the product is not sufficiently improved, and if it exceeds 200, the dimensional stability and appearance deteriorate.
本発明の組成物の（Ｂ）成分である繊維状無機充填剤
は、硫酸マグネシウム繊維、繊維状マグネシウムオキシ
サルフェート、水酸化マグネシウム繊維、酸化マグネシ
ウム繊維などのマグネシウム系繊維状無機充填剤であ
る。本発明の組成物は（Ａ）上記のプロピレン重合体60
〜99重量％、好ましくは、70〜97重量％と（Ｂ）繊維状
無機充填剤１〜40重量％、好ましくは、３〜30重量％と
を配合してなるものである。The fibrous inorganic filler which is the component (B) of the composition of the present invention is a magnesium-based fibrous inorganic filler such as magnesium sulfate fiber, fibrous magnesium oxysulfate, magnesium hydroxide fiber and magnesium oxide fiber. The composition of the present invention comprises (A) the propylene polymer 60 described above.
˜99 wt%, preferably 70 to 97 wt%, and (B) fibrous inorganic filler 1 to 40 wt%, preferably 3 to 30 wt%.
（Ａ）成分が60重量％以下だと耐衝撃性が悪くなり、99
重量％以上であると剛性が悪くなる。If the content of the component (A) is 60% by weight or less, the impact resistance becomes poor and 99
If it is more than weight%, the rigidity becomes poor.
本発明の組成物は、有機系核剤又は無機系核剤を併用す
ることによりさらに物性を向上させることができる。The physical properties of the composition of the present invention can be further improved by using an organic nucleating agent or an inorganic nucleating agent in combination.
この際使用する有機系核剤を例示すると、アルキル基を
芳香環に置換した安息香酸又はその誘導体の金属塩、例
えば、ｐ−ｔ−ブチルベンゾエートのアルミニウム塩な
ど、ジベンジリデンソルビトール及びその誘導体、例え
ば、1,3,2,4−ジベンジリデンソルビトール、1,3,2,4−
ジ（ｐ−メチルベンジリデン）ソルビトール、1,3,2,4
−ジ（ｐ−クロルベンジリデン）ソルビトール、1,3,2,
4−ジ（ｐ−メトキシベンジリデン）ソルビトールな
ど、リン酸ビス（４−ｔ−ブチルフェニル）ナトリウ
ム、シュウ酸カルシウム、ステアリン酸マグネシウム、
サリチル酸亜鉛、酒石酸カルシウム等の有機酸塩などが
挙げられる。Examples of the organic nucleating agent used in this case include metal salts of benzoic acid or its derivative in which an alkyl group is substituted on an aromatic ring, for example, aluminum salt of p-t-butylbenzoate, dibenzylidene sorbitol and its derivative, for example, , 1,3,2,4-dibenzylidene sorbitol, 1,3,2,4-
Di (p-methylbenzylidene) sorbitol, 1,3,2,4
-Di (p-chlorobenzylidene) sorbitol, 1,3,2,
4-di (p-methoxybenzylidene) sorbitol, bis (4-t-butylphenyl) sodium phosphate, calcium oxalate, magnesium stearate,
Examples thereof include organic acid salts such as zinc salicylate and calcium tartrate.
また、無機系核剤としては、例えば、タルク、クレー、
マイカ、モンモリロナイト、ベントナイト等の粘土類、
ケイ酸カルシウム、ケイ酸マグネシウム、硫酸カルシウ
ム、硫酸バリウム、炭酸カルシウム、酸化チタン、炭酸
マグネシウム、酸化亜鉛などの金属酸化物等が挙げられ
る。Examples of the inorganic nucleating agent include talc, clay,
Clays such as mica, montmorillonite and bentonite,
Examples thereof include metal oxides such as calcium silicate, magnesium silicate, calcium sulfate, barium sulfate, calcium carbonate, titanium oxide, magnesium carbonate and zinc oxide.
この核剤の配合量は微量でよく、本発明の樹脂組成物10
0重量部に対して、0.01〜１重量部配合することによ
り、組成物の剛性、耐熱性および硬度などをより一層向
上させることができる。１重量部よりも多量に使用して
も物性の向上効果が低い。The nucleating agent may be added in a small amount, and the resin composition of the present invention 10
By blending 0.01 to 1 part by weight with respect to 0 part by weight, the rigidity, heat resistance and hardness of the composition can be further improved. Even if it is used in a larger amount than 1 part by weight, the effect of improving the physical properties is low.
また、本発明の組成物は、密度0.940〜0.970のポリエチ
レンを本発明の組成物100重量部に対し、５〜25重量部
配合することによりさらに耐衝撃性等を向上させること
ができる。Further, the composition of the present invention can further improve impact resistance and the like by blending 5 to 25 parts by weight of polyethylene having a density of 0.940 to 0.970 with 100 parts by weight of the composition of the present invention.
なお、本発明の組成物においては、本発明の目的を阻害
しない範囲内で、他の添加剤を含有していても良い。The composition of the present invention may contain other additives as long as the object of the present invention is not impaired.
そのような添加剤としては、例えば、帯電防止剤、着色
剤、難燃剤、酸化防止剤、紫外線吸収剤、可塑剤、熱安
定剤等の各種添加剤を挙げられる。Examples of such additives include various additives such as antistatic agents, colorants, flame retardants, antioxidants, ultraviolet absorbers, plasticizers and heat stabilizers.
［発明の効果］ 本発明の組成物は耐衝撃性、曲げ強度等の機械的強度が
大きく、寸法安定性が良好であるので工業用成形材料と
して有用である。[Effects of the Invention] The composition of the present invention has high mechanical strength such as impact resistance and bending strength and good dimensional stability, and is therefore useful as an industrial molding material.
また、成形品の外観がよいので、布等による上張り又は
塗装を必要としないで、使用できるので有利である。Further, since the molded product has a good appearance, it is advantageous because it can be used without the need for overlaying or painting with a cloth or the like.
［実施例］ 実施例１〜12、比較例１〜８ 第１表に示した割合でプロピレン重量体及び繊維状充填
剤を配合し、Ｖ型ブレンダーでよく混合したのち、210
℃で融解混合して２軸押出機によりペレットとし、場合
によりこのペレットに第１表に示す核剤及び／又はポリ
エチレンを添加したものを射出成形し、この成形品につ
いて物性試験を行った。[Examples] Examples 1 to 12 and Comparative Examples 1 to 8 The propylene weight and the fibrous filler were blended in the proportions shown in Table 1 and mixed well with a V-type blender.
The mixture was melt-mixed at 0 ° C. to form pellets by a twin-screw extruder, and optionally the pellets to which the nucleating agent and / or polyethylene shown in Table 1 were added were injection-molded, and the physical properties of this molded product were tested.
このようにして得た結果を第２表に示す。The results thus obtained are shown in Table 2.
なお、実施例及び比較例に使用された物質及び成型品試
料の試験法は次の通りである。The test methods for the substances and molded product samples used in Examples and Comparative Examples are as follows.
プロピレン重合体５（PP−５） 98％のアイソタクチックペンタッド分率を有するホモポ
リマー プロピレン重合体１（PP−１） 98％のアイソタクチックペンタッド分率を有するエチレ
ン含有量４重量％のプロピレン共重合体 プロピレン重合体２（PP−２） 98.5％のアイソタクチックペンタッド分率を有するエチ
レン含有量の３重量％のプロピレン共重合体 プロピレン重合体３（PP−３） 94％のアイソタクチックペンタッド分率を有するエチレ
ン含有量４重量％のプロピレン共重合体 プロピレン重合体４（PP−４） 91％のアイソタクチックペンタッド分率を有するエチレ
ン含有量８重量％のプロピレン共重合体 核剤 K:p−（ｔ−ブチル）安息香酸アルミニウム L:1,3,2,4−ジベンジリデンソルビトール M:タルク ポリエチレン S:密度0.970、M120のポリエチレン T:密度0.960、M16のポリエチレン 試験法： （１）曲げ強度 ASTM D 790に準拠して測定した。Propylene polymer 5 (PP-5) homopolymer having an isotactic pentad fraction of 98% Propylene polymer 1 (PP-1) having an isotactic pentad fraction of 98% Ethylene content 4% by weight Of propylene copolymer 2 (PP-2) having an isotactic pentad fraction of 98.5% 3% by weight of ethylene content of propylene copolymer propylene polymer 3 (PP-3) of 94% Propylene copolymer having an isotactic pentad fraction and an ethylene content of 4% by weight Propylene polymer 4 (PP-4) Propylene copolymer having an isotactic pentad fraction and an ethylene content of 8% by weight having an isotactic pentad fraction Polymer Nucleating agent K: Aluminum p- (t-butyl) benzoate L: 1,3,2,4-Dibenzylidenesorbitol M: Talc Polyethylene S: Polyethylene of density 0.970, M120 Down T: density 0.960, polyethylene test method M16: (1) was measured according to the bending strength ASTM D 790.
（２）曲げ弾性率 ASTM D 790に準拠して測定した。(2) Flexural modulus Measured according to ASTM D 790.
（３）アイゾット衝撃強度 ASTM D 256（ノッチ付き）に準拠して測定した。(3) Izod impact strength Measured according to ASTM D 256 (with notch).
（４）表面外観 成形温度200℃、金型温度50℃で射出成形した140×140
×3mmの平板の表面粗さを目視して観察して評価した。(4) Surface appearance 140 × 140 injection molded at a molding temperature of 200 ℃ and mold temperature of 50 ℃
The surface roughness of a × 3 mm flat plate was visually observed and evaluated.
（５）反り率 射出成形して得た厚さ2mm、直径150mm、センターゲート
径5mmの円板を23℃の室温で48時間放置した後、その円
板の直径方向における両端の反り高さＨ（mm）、ｈ（m
m）を計測し、次式に従って反り率を求めた。(5) Warpage ratio After a disc having a thickness of 2 mm, a diameter of 150 mm and a center gate diameter of 5 mm obtained by injection molding was left at room temperature of 23 ° C for 48 hours, the warpage height H of both ends in the diameter direction of the disc was measured. (Mm), h (m
m) was measured and the warpage rate was calculated according to the following equation.
この測定においては、該円板の円周上の最も反りの大き
い位置を測定し、その点と円板の中心を結ぶ直線上に上
記の反り測定の際の直径方向とした。In this measurement, a position on the circumference of the disk having the largest warp was measured, and the straight line connecting the point and the center of the disk was set as the diametrical direction at the time of the warp measurement.
表中の反りに関する記号と反り率との関係は次の通りで
ある。 The relationship between the symbols relating to warpage in the table and the warpage rate is as follows.
反り率 記 号 ０〜２％ ○ ２〜５％ △ ５％以上 × （６）アイソタクチックペンタッド分率 アイソタクチックペンタット分率は、マクロモレキュル
（Macromolecules）、８巻、687ページ（1975）に記載
の方法により測定した。具体的には、試料のプロピレン
重合体の13C−NMRスペクトルのメチル炭素領域の全吸収
ピーク中のmmmmピークの強度分率としてアイソタクチッ
クペンタット単位を測定した。Warpage rate 0 to 2% ○ 2 to 5% △ 5% or more × (6) Isotactic pentad fraction Isotactic pentat fraction is defined as Macromolecules, Volume 8, page 687 ( 1975). Specifically, the isotactic pentat unit was measured as the intensity fraction of the mmmm peak in the total absorption peaks in the methyl carbon region of the 13 C-NMR spectrum of the propylene polymer of the sample.
Claims (1)
95％以上のプロピレン重合体60〜99重量％、及び（Ｂ）
0.1〜2.0μｍの繊維径で、かつ60〜200のアスペクト比
を有するマグネシウム系繊維状無機充填剤１〜40重量％
からなるポリプロピレン樹脂組成物。1. The (A) isotactic pentad fraction
60-99% by weight of 95% or more propylene polymer, and (B)
1 to 40% by weight of a magnesium-based fibrous inorganic filler having a fiber diameter of 0.1 to 2.0 μm and an aspect ratio of 60 to 200
A polypropylene resin composition comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61289515A JPH07107116B2 (en) | 1986-12-04 | 1986-12-04 | Polypropylene resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61289515A JPH07107116B2 (en) | 1986-12-04 | 1986-12-04 | Polypropylene resin composition |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8292859A Division JP2776462B2 (en) | 1996-11-05 | 1996-11-05 | Method for producing molding pellets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63142049A JPS63142049A (en) | 1988-06-14 |
| JPH07107116B2 true JPH07107116B2 (en) | 1995-11-15 |
Family
ID=17744263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61289515A Expired - Fee Related JPH07107116B2 (en) | 1986-12-04 | 1986-12-04 | Polypropylene resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107116B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3854716T2 (en) * | 1987-12-08 | 1996-07-25 | Idemitsu Petrochemical Co | Process for producing thermoplastic resin composition. |
| JPH0686290B2 (en) * | 1988-04-05 | 1994-11-02 | 宇部興産株式会社 | Granular fibrous magnesium oxysulfate, method for producing the same, and composite polypropylene resin composition containing the magnesium oxysulfate |
| CN1318499C (en) * | 2003-06-10 | 2007-05-30 | 上海英泰塑胶有限公司 | Composite polypropylene material containing potassium titanate whisker and glass fiber |
| JP6766142B2 (en) * | 2016-05-10 | 2020-10-07 | 株式会社プライムポリマー | Molded product of fiber reinforced polypropylene resin composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57109846A (en) * | 1980-12-26 | 1982-07-08 | Ube Ind Ltd | Fiber-reinforced polypropylene composition |
| JPH0551627A (en) * | 1991-08-23 | 1993-03-02 | Nissan Motor Co Ltd | Laser quenching method |
-
1986
- 1986-12-04 JP JP61289515A patent/JPH07107116B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63142049A (en) | 1988-06-14 |
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