JPH0959480A - Polyolefin resin composition - Google Patents
Polyolefin resin compositionInfo
- Publication number
- JPH0959480A JPH0959480A JP7213440A JP21344095A JPH0959480A JP H0959480 A JPH0959480 A JP H0959480A JP 7213440 A JP7213440 A JP 7213440A JP 21344095 A JP21344095 A JP 21344095A JP H0959480 A JPH0959480 A JP H0959480A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- propylene
- weight
- copolymer rubber
- resin 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.)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、剛性、耐熱性およ
び耐衝撃性のバランスに優れ、成形性および外観も同時
に優れたポリオレフィン系樹脂組成物に関するものであ
る。さらに詳しくは、樹脂製の自動車内装用部品に好適
な、剛性、耐熱性および耐衝撃性のバランスに優れ、ま
た成形性および外観も同時に優れたポリオレフィン系樹
脂組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyolefin resin composition having an excellent balance of rigidity, heat resistance and impact resistance, as well as excellent moldability and appearance. More specifically, the present invention relates to a polyolefin resin composition suitable for resin automobile interior parts, which is excellent in balance of rigidity, heat resistance and impact resistance, and is also excellent in moldability and appearance.
【０００２】[0002]
【従来の技術】結晶性ポリプロピレン樹脂は、剛性、耐
熱性に優れているが、自動車用途を始め家電、雑貨、フ
ィルムなどの製品分野に幅広く用いられている。しか
し、結晶性ポリプロピレン樹脂は耐衝撃性に劣るため、
まだその使用範囲には限りがあり、市場の要求を満足し
ていないのが現状である。従来の耐衝撃性の改良方法の
技術としていくつかの方法がとられており、その代表的
なものとして、１つは結晶性ポリプロピレン樹脂をプロ
ピレン−エチレンをブロック共重合化する方法、１つは
結晶性ポリプロピレン樹脂にエチレン−α−オレフィン
共重合体ゴムを配合する方法である。該方法を用いて得
られた結晶性ポリプロピレン樹脂または結晶性ポリプロ
ピレン樹脂組成物は自動車用バンパーおよびインストル
メントパネルなどの自動車内装用材料の用途に用いられ
ており、さらに剛性と耐熱性を同時に改良するため、タ
ルクなどの無機フィラーが配合された結晶性ポリプロピ
レン樹脂組成物が用いられている。しかしながら該結晶
性ポリプロピレン樹脂組成物は、剛性と耐衝撃性は優れ
るが、その反面、ゴムおよび無機フィラー（タルク）を
多量添加することにより流動性が低下し成形が困難とな
り、成形品のフローマークやウエルドが目立ち外観が優
れず、および成形品の重量が重くなるという問題点が残
っている。2. Description of the Related Art Crystalline polypropylene resins are excellent in rigidity and heat resistance, but are widely used in the fields of automobiles, home appliances, sundries, films and the like. However, since crystalline polypropylene resin is inferior in impact resistance,
Its use range is still limited, and it is the current situation that it does not meet the market demand. Several methods have been taken as conventional techniques for improving impact resistance. One of them is representatively a method of block-copolymerizing propylene-ethylene with a crystalline polypropylene resin, and one of them is It is a method of blending an ethylene-α-olefin copolymer rubber with a crystalline polypropylene resin. The crystalline polypropylene resin or the crystalline polypropylene resin composition obtained by using the method is used for automobile interior materials such as automobile bumpers and instrument panels, and further improves rigidity and heat resistance at the same time. Therefore, a crystalline polypropylene resin composition containing an inorganic filler such as talc is used. However, the crystalline polypropylene resin composition is excellent in rigidity and impact resistance, but on the other hand, addition of a large amount of rubber and an inorganic filler (talc) reduces fluidity and makes molding difficult, resulting in a flow mark of a molded product. There are still problems that the weld and the weld are not noticeable, and the weight of the molded product is heavy.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、剛
性、耐熱性および耐衝撃性のバランスに優れ、また成形
性および外観も同時に優れたポリオレフィン系樹脂組成
物を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a polyolefin resin composition which has an excellent balance of rigidity, heat resistance and impact resistance, as well as excellent moldability and appearance.
【０００４】[0004]
【課題を解決するための手段】本発明は下記の構成を有
する。 （１）アイソタクチックペンタット分率（Ｉ5）が０．
９６以上、Ｍｗ／Ｍｎ（Ｑ値）が６以下のプロピレン単
独重合部分およびプロピレン−エチレン共重合部分から
なる結晶性プロピレン−エチレンブロック共重合体
（イ）が７８〜８８重量％、エチレン−プロピレン共重
合体ゴム（ロ）が１〜５重量％、エチレン含有量７０〜
９０重量％のエチレン−ブテン−１共重合体ゴム（ハ）
が１〜５重量％、平均粒子径２μｍ以下のタルク（ニ）
が１０〜２重量％よりなるポリオレフィン系樹脂組成
物。The present invention has the following constitution. (1) The isotactic pentat fraction (I 5 ) is 0.
A crystalline propylene-ethylene block copolymer (a) having a propylene homopolymerization portion of 96 or more and a Mw / Mn (Q value) of 6 or less and a propylene-ethylene copolymerization portion is 78 to 88% by weight, and an ethylene-propylene copolymer. 1-5% by weight of polymer rubber (B), ethylene content 70-
90% by weight of ethylene-butene-1 copolymer rubber (c)
Of 1 to 5% by weight and an average particle diameter of 2 μm or less (d)
Of 10 to 2% by weight of a polyolefin resin composition.
【０００５】（２）前記エチレン−プロピレン共重合体
ゴム（ロ）がエチレン含有量７０〜８０重量％、ムーニ
ー粘度ＭＬ1+4（１００℃）１０〜３０である（１）項
記載のポリオレフィン系樹脂組成物。(2) The polyolefin system according to item (1), wherein the ethylene-propylene copolymer rubber (b) has an ethylene content of 70 to 80% by weight and a Mooney viscosity ML 1 + 4 (100 ° C.) of 10 to 30. Resin composition.
【０００６】（３）前記エチレン−プロピレン共重合体
ゴム（ロ）とエチレン−ブテン−１共重合体ゴム（ハ）
との重量％比が１：１〜３：１である（１）項記載のポ
リオレフィン系樹脂組成物。(3) The ethylene-propylene copolymer rubber (b) and the ethylene-butene-1 copolymer rubber (c)
The polyolefin resin composition according to the item (1), wherein the weight% ratio of the polyolefin resin is 1: 1 to 3: 1.
【０００７】（４）メルトフローレートが２５ｇ／１０
分以上、比重が０．９６から０．９８、引張強度が２９
ＭＰａ以上、引張伸び率が２００％以上、曲げ弾性率が
２５００ＭＰａ以上、曲げ強度が４０ＭＰａ以上、アイ
ゾット衝撃強度が７５Ｊ／ｍ以上および熱変形温度が７
５℃以上であることからなる（１）項記載のポリオレフ
ィン系樹脂組成物。(4) Melt flow rate is 25 g / 10
Min or more, specific gravity 0.96 to 0.98, tensile strength 29
MPa or more, tensile elongation of 200% or more, bending elastic modulus of 2500 MPa or more, bending strength of 40 MPa or more, Izod impact strength of 75 J / m or more, and heat deformation temperature of 7
The polyolefin resin composition according to item (1), which is at 5 ° C. or higher.
【０００８】[0008]
【発明の実施の形態】以下具体的に説明する。本発明の
組成物で用いられる結晶性プロピレン−エチレンブロッ
ク共重合体（イ）は、アイソタクチックペンタット分率
（Ｉ5）が０．９６以上、Ｍｗ／Ｍｎ（Ｑ値）が６以下
のプロピレン単独重合部分およびプロピレン−エチレン
共重合部分からなる結晶性プロピレン−エチレンブロッ
ク共重合体である。アイソタクチックペンタット分率
（Ｉ5）が０．９６を大きく下回る、またはＭｗ／Ｍｎ
（Ｑ値）が６を大きく超えるプロピレン単独重合部分お
よびプロピレン−エチレン共重合部分からなる結晶性プ
ロピレン−エチレンブロック共重合体を用いたポリオレ
フィン系樹脂組成物は得られる成型品の剛性および耐熱
性の点で好ましくない。該アイソタクチックペンタット
分率（Ｉ5）は、分子内立体規則性の指標であり、ＮＭ
Ｒにより測定できることが例示できる。BEST MODE FOR CARRYING OUT THE INVENTION A detailed description will be given below. The crystalline propylene-ethylene block copolymer (a) used in the composition of the present invention has an isotactic pentat fraction (I 5 ) of 0.96 or more and an Mw / Mn (Q value) of 6 or less. It is a crystalline propylene-ethylene block copolymer composed of a propylene homopolymer portion and a propylene-ethylene copolymer portion. Isotactic pentat fraction (I 5 ) is much lower than 0.96, or Mw / Mn
A polyolefin-based resin composition using a crystalline propylene-ethylene block copolymer having a propylene homopolymerization portion and a propylene-ethylene copolymerization portion having a (Q value) significantly larger than 6 has rigidity and heat resistance of a molded product obtained. It is not preferable in terms. The isotactic pentat fraction (I 5 ) is an index of intramolecular stereoregularity, and NM
It can be illustrated that it can be measured by R.
【０００９】該Ｍｗ／Ｍｎ（Ｑ値）は、ＧＰＣ法により
測定できることが例示できる。該結晶性プロピレン−エ
チレンブロック共重合体は、本発明のポリオレフィン系
樹脂組成物を高流動化し、該ポリオレフィン系樹脂組成
物を射出成形に用いた時の成形サイクルを短縮する点
で、メルトフローレート（２３０℃、２１．１８Ｎ荷
重）が３０〜７０ｇ／１０分のものが好ましい。該結晶
性プロピレン−エチレンブロック共重合体の製造方法
は、重合触媒として少なくともマグネシウム原子、チタ
ン原子、ハロゲン原子および多価カルボン酸エステルを
含む固体触媒、有機アルムニウム化合物、並びに電子供
与性化合物を用いて得られる高立体規則性触媒を用い、
公知のスラリー重合法により重合する製造方法が例示で
きる。It can be illustrated that the Mw / Mn (Q value) can be measured by the GPC method. The crystalline propylene-ethylene block copolymer has a melt flow rate in that the polyolefin resin composition of the present invention is highly fluidized and the molding cycle is shortened when the polyolefin resin composition is used for injection molding. It is preferable that (230 ° C., 21.18 N load) is 30 to 70 g / 10 minutes. The crystalline propylene-ethylene block copolymer is produced by using a solid catalyst containing at least a magnesium atom, a titanium atom, a halogen atom and a polyvalent carboxylic acid ester as a polymerization catalyst, an organic aluminum compound, and an electron donating compound. Using the resulting highly stereoregular catalyst,
An example is a production method in which polymerization is carried out by a known slurry polymerization method.
【００１０】本発明の組成物で用いるエチレン−プロピ
レン共重合体ゴム（ロ）は、特に限定するものではない
が、耐衝撃性の向上およびポリオレフィン系樹脂組成物
での分散の点でムーニー粘度ＭＬ1+4（１００℃）が１
０〜３０のエチレン−プロピレン共重合体ゴムが好まし
く、更に耐衝撃性の向上の点でエチレン含有量が７０〜
８０重量％のエチレン−プロピレン共重合体ゴムが好ま
しい。The ethylene-propylene copolymer rubber (b) used in the composition of the present invention is not particularly limited, but in terms of improvement of impact resistance and dispersion in the polyolefin resin composition, the Mooney viscosity ML. 1 + 4 (100 ℃) is 1
An ethylene-propylene copolymer rubber of 0 to 30 is preferable, and the ethylene content is 70 to 70 from the viewpoint of improving impact resistance.
80 wt% ethylene-propylene copolymer rubber is preferred.
【００１１】本発明に用いるエチレン−ブテン−１共重
合体ゴム（ハ）は、エチレン含有量７０〜９０重量％の
エチレン−ブテン−１共重合体ゴムであり、耐衝撃の点
でメルトフローレート（１９０℃、２１．１８Ｎ荷重）
が１〜２０ｇ／１０分のエチレン−ブテン−１共重合体
ゴムが好ましい。エチレン含有量が７０重量％を大きく
下回るエチレン−ブテン−１共重合体ゴムを用いたポリ
オレフィン系樹脂組成物は、得られる成型品の剛性が優
れず、エチレン含有量が９０％を大きく超えるエチレン
−ブテン−１共重合体ゴムを用いたポリオレフィン系樹
脂組成物は、得られる成型品の耐衝撃性が優れない。The ethylene-butene-1 copolymer rubber (c) used in the present invention is an ethylene-butene-1 copolymer rubber having an ethylene content of 70 to 90% by weight, and has a melt flow rate in view of impact resistance. (190 ° C, 21.18N load)
Is preferably 1 to 20 g / 10 min of ethylene-butene-1 copolymer rubber. A polyolefin-based resin composition using an ethylene-butene-1 copolymer rubber having an ethylene content much lower than 70% by weight does not have excellent rigidity in a molded product to be obtained, and an ethylene-containing resin having an ethylene content greatly exceeding 90% is used. A polyolefin-based resin composition using butene-1 copolymer rubber does not have excellent impact resistance of the obtained molded product.
【００１２】本発明の組成物に用いるタルク（ニ）は、
耐衝撃性をほとんど低下させることなく剛性を向上させ
る点で平均粒子径２μｍ以下のタルクである。The talc (d) used in the composition of the present invention is
Talc has an average particle diameter of 2 μm or less in terms of improving rigidity without substantially reducing impact resistance.
【００１３】本発明のポリオレフィン系樹脂組成物は結
晶性プロピレン−エチレンブロック共重合体（イ）が７
８〜８８重量％、エチレン−プロピレン共重合体ゴム
（ロ）が１〜５重量％、エチレン−ブテン−１共重合体
ゴム（ハ）が１〜５重量％、平均粒子径２μｍ以下のタ
ルク（ニ）が１０〜１２重量％からなり、該エチレン−
プロピレン共重合体ゴムが１重量％を大きく下回る組成
物は、耐衝撃性が優れず、５重量％を大きく超える組成
物は、剛性および耐熱性、流動性、成形サイクル、並び
に成形品の外観（フローマークが生じるため）が優れ
ず、さらに該エチレン−ブテン−１共重合体ゴムが１重
量％を大きく下回る組成物は耐衝撃性が優れず、５重量
％を大きく超える組成物は、剛性および耐熱性、流動
性、成形サイクル、並びに成形品の外観（フローマーク
が生じるため）が優れない。The polyolefin resin composition of the present invention comprises a crystalline propylene-ethylene block copolymer (a) of 7
8-88% by weight, ethylene-propylene copolymer rubber (B) 1-5% by weight, ethylene-butene-1 copolymer rubber (C) 1-5% by weight, talc having an average particle diameter of 2 μm or less ( D) is 10 to 12% by weight, and the ethylene-
A composition in which the propylene copolymer rubber is significantly less than 1% by weight has excellent impact resistance, and a composition in which the propylene copolymer rubber greatly exceeds 5% by weight has rigidity and heat resistance, fluidity, a molding cycle, and an appearance of a molded article ( The composition of which the ethylene-butene-1 copolymer rubber is much less than 1% by weight is not excellent in impact resistance, and the composition of which more than 5% by weight is excellent in rigidity and Heat resistance, fluidity, molding cycle, and appearance of molded products (because of flow marks) are not excellent.
【００１４】本発明の組成物に用いるエチレン−プロピ
レン共重合体ゴム（ロ）およびエチレン−ブテン−１共
重合体ゴム（ハ）は同様の目的で用いるが、特に該エチ
レン−ブテン−１共重合体ゴム（ハ）は該エチレン−プ
ロピレン共重合体ゴム（ロ）と比較して、組成物の剛性
および耐熱性の低下を少なくすることができるが、逆に
耐衝撃性の向上効果にやや劣るためと該エチレン−プロ
ピレン共重合体ゴム（ロ）と併用することで組成物の物
性（剛性、耐熱性および耐衝撃性など）を制御すること
ができ、好ましくは該エチレン−プロピレン共重合体ゴ
ム（ロ）とエチレン−ブテン−１共重合体ゴム（ハ）と
の重量％比が１：１〜３：１である。The ethylene-propylene copolymer rubber (b) and the ethylene-butene-1 copolymer rubber (c) used in the composition of the present invention are used for the same purpose, but especially the ethylene-butene-1 copolymer weight is used. Compared with the ethylene-propylene copolymer rubber (b), the compounded rubber (c) can reduce the decrease in rigidity and heat resistance of the composition, but on the contrary, is slightly inferior in the effect of improving impact resistance. Therefore, the physical properties of the composition (rigidity, heat resistance, impact resistance, etc.) can be controlled by using the ethylene-propylene copolymer rubber (b) in combination, and preferably the ethylene-propylene copolymer rubber is used. The weight% ratio of (b) to the ethylene-butene-1 copolymer rubber (c) is 1: 1 to 3: 1.
【００１５】本発明のポリオレフィン系樹脂組成物にあ
っては、本発明の効果を阻害しない範囲で、必要に応じ
て適宜に、酸化防止剤、帯電防止剤、着色剤（顔料）、
造核剤、スリップ剤、離型剤、難燃剤、紫外線吸収剤、
耐候剤、可塑剤、ラジカル発生剤などの各種添加剤の１
種以上を配合することができる。In the polyolefin-based resin composition of the present invention, an antioxidant, an antistatic agent, a colorant (pigment), if necessary, may be appropriately added as long as the effects of the present invention are not impaired.
Nucleating agent, slip agent, release agent, flame retardant, UV absorber,
One of various additives such as weathering agents, plasticizers and radical generators
More than one species can be blended.
【００１６】本発明のポリオレフィン系樹脂組成物の製
造方法（ブレンド方法）は、通常用いられる粉体状や粒
体状の物質のブレンド方法を適用することができる。例
えば、本発明に用いられる各成分の所定量と安定剤、着
色剤とをリボンブレンダー、タンブラーミキサー、ヘン
セルミキサー（商品名）、スーパーミキサーなどで撹伴
混合し、ロール、バンバリーミキサー、ラボプラストミ
ル、一軸または二軸混練押出機などで溶融温度１５０℃
〜３００℃、好ましくは１８０℃〜２５０℃で溶融混練
ペレタイズする方法を例示することができる。かくして
得られた本発明のポリオレフィン系樹脂組成物は、射出
成形、押出成形、真空成形、圧空成形などの各種成形法
により種々の成形品の製造に供することができるが、な
かでも射出成形による成形品の製造が好ましい。As the method for producing the polyolefin resin composition (blending method) of the present invention, a commonly used method for blending powdery or granular substances can be applied. For example, a predetermined amount of each component used in the present invention and a stabilizer and a colorant are mixed by stirring with a ribbon blender, a tumbler mixer, a Hensell mixer (trade name), a super mixer, etc., and a roll, a Banbury mixer, a Laboplast. Melt temperature 150 ° C in a mill, single-screw or twin-screw kneading extruder
Examples of the method include melt-kneading and pelletizing at ˜300 ° C., preferably 180 ° C. to 250 ° C. The polyolefin resin composition of the present invention thus obtained can be used for the production of various molded articles by various molding methods such as injection molding, extrusion molding, vacuum molding, and pressure molding, but among them, molding by injection molding is possible. The manufacture of goods is preferred.
【００１７】[0017]
【実施例】以下、実施例および比較例によって本発明の
組成物を具体的に説明するが本発明はこれによって限定
されるものではない。実施例および比較例における組成
物に用いられる各成分はつぎに示すように略記する。 （イ）結晶性プロピレン−エチレンブロック共重合体： ＰＰ−１：メルトフローレート（２３０℃ 、２１．１
８Ｎ荷重）が３５ｇ／１０分、アイソタクチックペンタ
ッド分率が０．９６５、Ｑ値が５．６のプロピレン単独
重合部分、エチレン含有量が５．３重量％。 （イ′）結晶性プロピレン−エチレンブロック共重合
体： ＰＰ−２：メルトフローレート（２３０℃ 、２１．１
８Ｎ荷重）が３６ｇ／１０分、アイソタクチックペンタ
ッド分率が０．９５５で、Ｑ値が１０．６のプロピレン
単独重合部分、エチレン含有量が５．１重量％。 （ロ）エチレン−プロピレン共重合体ゴム： ＥＰＲ−１：エチレン含有量が７８重量％、ムーニー粘
度がＭＬ1+4（１００℃）＝２４ ＥＰＲ−２：エチレン含有量が５７重量％、ムーニー粘
度がＭＬ1+4（１００℃）＝６５ ＥＰＲ−３：エチレン含有量が７７重量％、ムーニー粘
度がＭＬ1+4（１００℃）＝６３ （ハ）エチレン−ブテン−１共重合体ゴム： ＥＢＲ−１：エチレン含有量が８０重量％、メルトフロ
ーレートが（１９０℃、２．１６ｋｇ荷重）３．７ｇ／
１０分 （ニ）タルク： タルク−１：平均粒子径が１．３μｍEXAMPLES The compositions of the present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited thereto. Each component used in the compositions in Examples and Comparative Examples is abbreviated as shown below. (A) Crystalline propylene-ethylene block copolymer: PP-1: Melt flow rate (230 ° C., 21.1
8N load) is 35 g / 10 minutes, isotactic pentad fraction is 0.965, propylene homopolymerization portion with Q value of 5.6, and ethylene content is 5.3% by weight. (A ′) Crystalline propylene-ethylene block copolymer: PP-2: Melt flow rate (230 ° C., 21.1
8N load) is 36 g / 10 minutes, isotactic pentad fraction is 0.955, propylene homopolymerization portion with Q value of 10.6, ethylene content is 5.1% by weight. (B) Ethylene-propylene copolymer rubber: EPR-1: ethylene content 78% by weight, Mooney viscosity ML 1 + 4 (100 ° C.) = 24 EPR-2: ethylene content 57% by weight, Mooney viscosity Is ML 1 + 4 (100 ° C.) = 65 EPR-3: ethylene content is 77 wt%, Mooney viscosity is ML 1 + 4 (100 ° C.) = 63 (C) Ethylene-butene-1 copolymer rubber: EBR -1: Ethylene content 80% by weight, melt flow rate (190 ° C, 2.16 kg load) 3.7 g /
10 minutes (d) Talc: Talc-1: Average particle size is 1.3 μm
【００１８】（実施例１、２、比較例１〜９）各成分を
表１に示した組成比で配合し、ヘンセルミキサー（商品
名）にて３分間撹伴混合し、２軸混練押出機ＰＣＭ−４
５（池貝鉄工社製）を用いて溶融混練し、ペレット化
し、ポリオレフィン系樹脂組成物を得た。得られた組成
物の各種評価試験を行った結果を表１に示す。(Examples 1 and 2, Comparative Examples 1 to 9) The respective components were blended in the composition ratios shown in Table 1, mixed with stirring by a Henschel mixer (trade name) for 3 minutes, and then biaxially kneaded and extruded. Machine PCM-4
5 (manufactured by Ikegai Tekko Co., Ltd.) was melt-kneaded and pelletized to obtain a polyolefin resin composition. The results of various evaluation tests of the obtained composition are shown in Table 1.
【００１９】種評価試験方法を下記に示した。 （１）メルトフローレート（単位：ｇ／１０分） 得られたペレットを２３０℃、荷重２１．１８Ｎの条件
下でＡＳＴＭ Ｄ１２３８に準拠し、流動性の指標とし
て測定した。成形温度２２０℃、金型温度３０℃で射出
成形された物性試験測定用の試験片により、２３℃の室
内でつぎの（２）〜（８）の試験を行った。 （２）引張強度（ＭＰａ） ＡＳＴＭ Ｄ６３８に準拠した。剛性の指標の一つであ
り引張強度の値が高いほど剛性が優れる。 （３）引張伸び率（％） ＡＳＴＭ Ｄ６３８に準拠した。耐衝撃性の指標の一つ
であり引張伸び率の値が高いほど耐衝撃性が優れる。 （４）曲げ弾性率（ＭＰａ） ＡＳＴＭ Ｄ７９０に準拠し３点曲げ弾性率を測定し
た。剛性の指標の一つであり曲げ弾性率が高いほど剛性
が優れる。 （５）曲げ強度（ＭＰａ） ＡＳＴＭ Ｄ７９０に準拠し３点曲げ強度を測定した。
剛性の指標の一つであり曲げ強度の値が高いほど剛性が
優れる。 （６）アイゾッド衝撃強度（Ｊ／ｍ） ノッチ加工を施し、ＡＳＴＭ Ｄ２５６に準拠した。耐
衝撃性の指標の一つでありアイゾッド衝撃強度の値が高
いほど耐衝撃性が優れる。 （７）熱変形温度（℃） ＡＳＴＭ Ｄ６４８；１８２０ｋＰａ荷重に準拠した。
耐熱性の指標の一つであり熱変形温度の値が高いほど耐
熱性が優れる。 （８）ロックウェル硬度（Ｒ−スケール） ＡＳＴＭ Ｄ７８５に準拠した。剛性の指標の一つであ
りロックウェル硬度の値が高いほど剛性が優れる。 （９）外観 １００ｍｍ×１００ｍｍ×３ｍｍの射出成型品を成形
し、標準サンプルと目視にて比較し、フローマーク、ウ
エルドが認められないものをＧ、明らかに認められるも
のをＮと評価した。メルトフローレート１０ｇ／１０分
の結晶性プロピレン単独重合体を用いて射出成形し、得
られた１００ｍｍ×１００ｍｍ×３ｍｍの射出成形品を
標準試験片とした。The seed evaluation test method is shown below. (1) Melt flow rate (unit: g / 10 minutes) The obtained pellets were measured as a fluidity index according to ASTM D1238 under the conditions of 230 ° C and a load of 21.18N. The following tests (2) to (8) were conducted in a room at 23 ° C. by using a test piece for measuring a physical property injection molded at a molding temperature of 220 ° C. and a mold temperature of 30 ° C. (2) Tensile strength (MPa) Based on ASTM D638. It is one of the indices of rigidity, and the higher the value of tensile strength, the better the rigidity. (3) Tensile elongation (%) Based on ASTM D638. It is one of the indexes of impact resistance, and the higher the value of tensile elongation, the better the impact resistance. (4) Flexural Modulus (MPa) The three-point flexural modulus was measured according to ASTM D790. It is one of the indexes of rigidity, and the higher the flexural modulus, the better the rigidity. (5) Bending strength (MPa) Three-point bending strength was measured according to ASTM D790.
It is one of the indexes of rigidity, and the higher the bending strength value, the better the rigidity. (6) Izod impact strength (J / m) Notched, and conformed to ASTM D256. It is one of the indicators of impact resistance, and the higher the value of Izod impact strength, the better the impact resistance. (7) Heat distortion temperature (° C.) According to ASTM D648; 1820 kPa load.
It is one of the indexes of heat resistance, and the higher the heat distortion temperature, the better the heat resistance. (8) Rockwell hardness (R-scale) According to ASTM D785. It is one of the indexes of rigidity, and the higher the Rockwell hardness value, the better the rigidity. (9) Appearance A 100 mm × 100 mm × 3 mm injection-molded product was molded and visually compared with a standard sample. When flow marks and welds were not recognized, G was evaluated, and when clearly observed, N was evaluated. Injection molding was performed using a crystalline propylene homopolymer having a melt flow rate of 10 g / 10 min, and the obtained 100 mm × 100 mm × 3 mm injection molded product was used as a standard test piece.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１から明らかなように、本発明に係わる
ポリオレフィン系樹脂組成物を用いた実施例１、２の成
形品は、剛性（ロックウエル硬度など）−耐熱性（熱変
形温度）−耐衝撃性（アイゾット衝撃強度、引張伸びな
ど）のバランスに優れている。これらに対し、比較例
１，５，７はアイゾット衝撃強度が優れず、比較例２，
３，４，６は熱変形温度が優れず、更に比較例２はロッ
クウェル硬度も優れない。また、比較例８、９のＰＰ−
２は、プロピレン単独重合部分のアイソタクチックペン
タット分率が０．９６未満で、Ｑ値が６を超えているた
め、引張伸度が優れず、好ましくない。As is clear from Table 1, the molded articles of Examples 1 and 2 using the polyolefin resin composition according to the present invention have rigidity (Rockwell hardness etc.)-Heat resistance (heat distortion temperature) -impact resistance. Excellent balance of properties (Izod impact strength, tensile elongation, etc.). On the other hand, Comparative Examples 1, 5 and 7 were not excellent in Izod impact strength, and Comparative Example 2,
Nos. 3, 4 and 6 are not excellent in heat distortion temperature, and Comparative Example 2 is also not excellent in Rockwell hardness. Moreover, PP- of Comparative Examples 8 and 9
No. 2 is not preferable because the isotactic pentat fraction of the propylene homopolymerized portion is less than 0.96 and the Q value exceeds 6, so that the tensile elongation is not excellent.
【００２２】[0022]
【発明の効果】本発明のポリオレフィン系樹脂組成物
は、成形性、特に射出成形性が優れ、更に、該ポリオレ
フィン系樹脂組成物を用いた成形品が剛性、耐熱性およ
び耐衝撃性のバランスに優れ、同時に外観も優れるとい
う効果を発揮し、自動車内装用部品に極めて有用であ
る。EFFECT OF THE INVENTION The polyolefin resin composition of the present invention has excellent moldability, particularly injection moldability, and a molded article using the polyolefin resin composition has a balance of rigidity, heat resistance and impact resistance. It is excellent and at the same time has an excellent appearance, and is extremely useful for automobile interior parts.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 23:08） (72)発明者 西尾 武純 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 鹿目 義弘 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical display location C08L 23:08) (72) Inventor Takesumi Nishio 1 Toyota-cho, Toyota City, Aichi Prefecture Toyota Motor Corporation Stock In-house (72) Inventor Yoshihiro Kaname 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd.
Claims (4)
（Ｉ5）が０．９６以上、Ｍｗ／Ｍｎ（Ｑ値）が６以下
のプロピレン単独重合部分およびプロピレン−エチレン
共重合部分からなる結晶性プロピレン−エチレンブロッ
ク共重合体（イ）が７８〜８８重量％；エチレン−プロ
ピレン共重合体ゴム（ロ）が１〜５重量％；エチレン含
有量７０〜９０重量％のエチレン−ブテン−１共重合体
ゴム（ハ）が１〜５重量％；および平均粒子径２μｍ以
下のタルク（ニ）が１０〜１２重量％；からなるポリオ
レフィン系樹脂組成物。1. A crystalline propylene-comprising a propylene homopolymer portion and a propylene-ethylene copolymer portion having an isotactic pentat fraction (I 5 ) of 0.96 or more and an Mw / Mn (Q value) of 6 or less. 78 to 88% by weight of ethylene block copolymer (a); 1 to 5% by weight of ethylene-propylene copolymer rubber (b); ethylene-butene-1 copolymer rubber having an ethylene content of 70 to 90% by weight. (C) 1 to 5% by weight; and talc (d) having an average particle diameter of 2 μm or less 10 to 12% by weight;
（ロ）がエチレン含有量７０〜８０重量％、ムーニー粘
度ＭＬ1+4（１００℃）１０〜３０である請求項１記載
のポリオレフィン系樹脂組成物。2. The polyolefin resin composition according to claim 1, wherein the ethylene-propylene copolymer rubber (b) has an ethylene content of 70 to 80% by weight and a Mooney viscosity ML 1 + 4 (100 ° C.) of 10 to 30. Stuff.
（ロ）と前記エチレン−ブテン−１共重合体ゴム（ハ）
との重量％比が１：１〜３：１である請求項１記載のポ
リオレフィン系樹脂組成物。3. The ethylene-propylene copolymer rubber (b) and the ethylene-butene-1 copolymer rubber (c).
The polyolefin resin composition according to claim 1, wherein the weight% ratio thereof is 1: 1 to 3: 1.
上、比重が０．９６〜０．９８、引張強度が２９ＭＰａ
以上、引張伸び率が２００％以上、曲げ弾性率が２５０
０ＭＰａ以上および曲げ強度が４０ＭＰａ以上、アイゾ
ット衝撃強度が７５Ｊ／ｍ以上、および熱変形温度が７
５℃以上であることからなる請求項１記載のポリオレフ
ィン系樹脂組成物。4. A melt flow rate of 25 g / 10 minutes or more, a specific gravity of 0.96 to 0.98, and a tensile strength of 29 MPa.
Above, tensile elongation is 200% or more, flexural modulus is 250
0 MPa or more, bending strength of 40 MPa or more, Izod impact strength of 75 J / m or more, and heat distortion temperature of 7
The polyolefin resin composition according to claim 1, which is at 5 ° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21344095A JP3356364B2 (en) | 1995-08-22 | 1995-08-22 | Polyolefin resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21344095A JP3356364B2 (en) | 1995-08-22 | 1995-08-22 | Polyolefin resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0959480A true JPH0959480A (en) | 1997-03-04 |
| JP3356364B2 JP3356364B2 (en) | 2002-12-16 |
Family
ID=16639273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21344095A Expired - Fee Related JP3356364B2 (en) | 1995-08-22 | 1995-08-22 | Polyolefin resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3356364B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000095919A (en) * | 1998-09-22 | 2000-04-04 | Chisso Corp | Automobile side molding resin composition and automobile side molding |
| JP2006316106A (en) * | 2005-05-10 | 2006-11-24 | Toyota Motor Corp | Polypropylene resin composition and injection molding method and molded body using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6466263A (en) * | 1987-09-07 | 1989-03-13 | Chisso Corp | Resin composition for automobile exterior parts |
| JPH0598094A (en) * | 1991-10-09 | 1993-04-20 | Sumitomo Chem Co Ltd | Rigid thermoplastic resin composition and injection-molded product thereof |
| JPH0598123A (en) * | 1991-10-03 | 1993-04-20 | Tonen Chem Corp | Resin composition for exterior automotive trim |
| JPH0598125A (en) * | 1991-10-03 | 1993-04-20 | Tonen Chem Corp | Resin composition for exterior automotive trim |
| JPH0753843A (en) * | 1993-08-19 | 1995-02-28 | Mitsubishi Chem Corp | Thermoplastic polymer composition |
-
1995
- 1995-08-22 JP JP21344095A patent/JP3356364B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6466263A (en) * | 1987-09-07 | 1989-03-13 | Chisso Corp | Resin composition for automobile exterior parts |
| JPH0598123A (en) * | 1991-10-03 | 1993-04-20 | Tonen Chem Corp | Resin composition for exterior automotive trim |
| JPH0598125A (en) * | 1991-10-03 | 1993-04-20 | Tonen Chem Corp | Resin composition for exterior automotive trim |
| JPH0598094A (en) * | 1991-10-09 | 1993-04-20 | Sumitomo Chem Co Ltd | Rigid thermoplastic resin composition and injection-molded product thereof |
| JPH0753843A (en) * | 1993-08-19 | 1995-02-28 | Mitsubishi Chem Corp | Thermoplastic polymer composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000095919A (en) * | 1998-09-22 | 2000-04-04 | Chisso Corp | Automobile side molding resin composition and automobile side molding |
| JP2006316106A (en) * | 2005-05-10 | 2006-11-24 | Toyota Motor Corp | Polypropylene resin composition and injection molding method and molded body using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3356364B2 (en) | 2002-12-16 |
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