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JPS6136788B2 - - Google Patents

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Publication number
JPS6136788B2
JPS6136788B2 JP54038870A JP3887079A JPS6136788B2 JP S6136788 B2 JPS6136788 B2 JP S6136788B2 JP 54038870 A JP54038870 A JP 54038870A JP 3887079 A JP3887079 A JP 3887079A JP S6136788 B2 JPS6136788 B2 JP S6136788B2
Authority
JP
Japan
Prior art keywords
parts
weight
polypropylene resin
resin composition
examples
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
Application number
JP54038870A
Other languages
Japanese (ja)
Other versions
JPS55131032A (en
Inventor
Haruo Okuyama
Norio Sugi
Nobutaka Sasaki
Takayoshi Tanaka
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.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical 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 Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Priority to JP3887079A priority Critical patent/JPS55131032A/en
Publication of JPS55131032A publication Critical patent/JPS55131032A/en
Publication of JPS6136788B2 publication Critical patent/JPS6136788B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

本発明はポリプロピレン系樹脂組成物に関し、
特に成形性にすぐれ、かつ外観の良好な成形品を
得ることができるポリプロピレン系樹脂組成物に
関する。 ポリプロピレンに無機充填剤等を配合すること
により、ポリプロピレンの剛性、寸法安定性、熱
変形温度等を改善することは良く知られている。
しかし、無機充填剤等を配合することによりポリ
プロピレン樹脂組成物の流動性や成形性が著しく
低下するという欠点がある。この成形性低下とい
う大きな欠点の改良法としては、可塑剤、滑剤等
の添加剤を用いる方法が考えられ、滑剤として通
常用いられる脂肪酸アミドを添加する方法も提案
されている。しかしこの方法で得られる成形品は
添加剤がブリージングするという本質的欠点があ
り、その用途は大巾に制限されている。 本発明の目的は、上記のような欠点を解消して
ポリプロピレンの剛性、寸法安定性などの性質の
向上と、あわせて成形性に特にすぐれ、フローマ
ーク、ヤケ、ブリージングのないすぐれた表面性
をもつ成形品を得るためのポリプロピレン系樹脂
組成物を提供し、薄肉成形品などの新規な用途へ
の利用を図ることにある。 本発明は有機過酸化物を添加した充填剤配合ポ
リプロピレン系樹脂組成物において、特定の滑剤
を添加してなる組成物に関するものである。すな
わち 本発明のポリプロピレン系樹脂組成物は(a)ポリ
プロピレン系樹脂、(b)無機粉状充填剤および/ま
たは有機充填剤、(c)有機過酸化物および(d)脂肪
酸、脂肪酸の金属塩、脂肪酸エステルのうちから
選ばれた少なくとも1種の滑剤を溶融混合してな
るものである。 本発明に使用するポリプロピレン系樹脂を例示
すれば、結晶性ポリプロピレン、プロピレンとエ
チレンのブロツクコポリマー、ランダムコポリマ
ー、グラフトコポリマーの単独もしくは混合物あ
るいはこれらを主成分とする他のポリマーとの配
合物などをあげることができる。 また無機粉状充填剤としては、炭酸カルシウ
ム、タルク、ケイ酸カルシウム、硫酸カルシウ
ム、亜硫酸カルシウム、炭酸マグネシウム、クレ
ー、水酸化アルミニウム、水酸化カルシウム、ガ
ラス粉、アスベスト、珪石粉等があり、有機充填
剤としては木粉、セルロース繊維、合成繊維、メ
ラミンパウダー等がある。なおこれら充填剤は単
独であるいは組合せて用いることができる。 有機過酸化物の例としては、1・3−ビス−
(t−ブチルパーオキシ−イソプロピル)ベンゼ
ン、2・5−ジメチル−2・5−ジ(t−ブチル
パーオキシ)ヘキサン、2・5−ジメチル−2・
5−ジ(t−ブチルパーオキシ)ヘキシン−3、
ジクミルパーオキサイドなどのジアルキルパーオ
キサイドやt−ブチルハイドロパーオキサイド、
キユメンハイドロパーオキサイドなどのハイドロ
パーオキサイド等をあげることができる。 また、滑剤としては、ブリージング防止の点か
ら鋭意検討した結果ステアリン酸、パルミチン酸
などの脂肪酸;ステアリン酸鉛、二塩基性ステア
リン酸鉛、ステアリン酸カドミウム、ステアリン
酸バリウム、ステアリン酸カルシウム、ステアリ
ン酸亜鉛などの脂肪酸の金属塩;ブチルステアレ
ート、セチルパルミテート、ステアリン酸モノグ
リセライドなどの脂肪酸エステルが特に有用であ
ることがわかつた。なかでも脂肪酸エステル類
は、ヤケの発生もなく、また耐候性に極めてすぐ
れている。 その他、必要に応じて抗酸化剤、光安定剤等の
添加剤を適宜加えることができる。 本発明のポリプロピレン系樹脂組成物における
上記各成分の配合割合は(a)ポリプロピレン系樹脂
100重量部に対して(b)無機粉状充填剤および/ま
たは有機充填剤5〜400重量部、好ましくは10〜
200重量部、(c)有機過酸化物0.0001〜5重量部、
好ましくは0.001〜2重量部および(d)滑剤0.01〜
5重量部、好ましくは0.05〜2重量部の割合で配
合する。 上記各成分は170〜250℃の温度で30秒〜10分間
溶融混合して目的とする組成物を得る。さらに、
必要に応じペレツト化する。この組成物から成形
品を製造する場合は、直接成形、押出成形、射出
成形等の手段を適用することができる。 本発明のポリプロピレン系樹脂組成物は流動性
が良く、成形性にすぐれており、しかも得られる
成形品はフローマーク、ウエルドマークが少な
く、添加剤のブリージングもなく塗装性などにす
ぐれると共に金型を腐食させるおそれもない。ま
たヒケやソリも少ないので外観が良好である。し
たがつて、工業材料、とりわけ電機部品、自動車
部品、日用品などの射出成形品の製造に適してい
る。また、薄肉成形品や大型成形品を得ることも
可能である。 次に、本発明を実施例により詳しく説明する。 実施例 1〜6 ポリプロピレン、無機粉状充填剤、有機充填
剤、有機過酸化物および滑剤を表−1に示す配合
割合で混合し、次の方法でペレツト化した。 (1) 配合物をインターミツクスにて200℃、4分
間混練(実施例1、2、5および6) (2) 配合物をV型ブレンダーでブレンド後、単軸
押出機にて240℃にて混練(実施例3) (3) 配合物をヘンシエルミキサーでブレンド後、
CCM二軸連続混練機(中央機械(株)製)で250℃
にて混練(実施例4) このようにして得たペレツトを用いて射出成形
により試験片を作成し、物性を測定した。一方、
射出成形機にてアルキメデス型スパイラルフロー
金型を用い、シリンダー温度215℃(実施例6お
よび比較例7のみ200℃)、射出圧力800Kg/cm2、金
型温度50℃にて成形したスパイラルフロー長さを
測定して成形性を評価した。また、射出成形にて
100×150×40mm、肉厚1.5mmの箱状成形品を成形
し、成形に要する最小充填圧力を求め、成形性を
評価した、なお、ゲートは底面中央部1mm径のピ
ンゲートであつた。結果を表−1に示す。 比較例 1〜7 有機過酸化物を配合しなかつたこと以外は実施
例1〜6と同様にして行なつた。 結果を表−1に示す。 なお、表−1に示した各物性の測定は次の方法
により行なつた。 引張強度:ASTM D−638 引張弾性率:ASTM D−638 衝撃強度:ASTM D−256 実施例2と比較例2よりペレツトでほぼ同じメ
ルトインデツクスを示すものの比較においてさ
え、スパイラルフロー、成形圧力(充填圧力)、
外観において本発明組成物がすぐれた成形性を有
することが明らかである。
The present invention relates to a polypropylene resin composition,
In particular, the present invention relates to a polypropylene resin composition that has excellent moldability and can produce molded products with good appearance. It is well known that the rigidity, dimensional stability, heat distortion temperature, etc. of polypropylene can be improved by blending an inorganic filler or the like with polypropylene.
However, there is a drawback that the fluidity and moldability of the polypropylene resin composition are significantly reduced by adding inorganic fillers and the like. As a method for improving this major drawback of reduced moldability, it is possible to use additives such as plasticizers and lubricants, and a method of adding a fatty acid amide, which is commonly used as a lubricant, has also been proposed. However, the molded articles obtained by this method have the essential drawback of bleeding of additives, and their applications are largely limited. The purpose of the present invention is to eliminate the above-mentioned drawbacks and improve properties such as rigidity and dimensional stability of polypropylene, and at the same time, provide particularly excellent moldability and excellent surface properties without flow marks, discoloration, or bleeding. It is an object of the present invention to provide a polypropylene resin composition for obtaining molded products with elasticity, and to utilize it in new applications such as thin-walled molded products. The present invention relates to a filler-containing polypropylene resin composition to which an organic peroxide is added, in which a specific lubricant is added. That is, the polypropylene resin composition of the present invention comprises (a) a polypropylene resin, (b) an inorganic powder filler and/or an organic filler, (c) an organic peroxide, and (d) a fatty acid, a metal salt of a fatty acid, It is made by melt-mixing at least one lubricant selected from fatty acid esters. Examples of the polypropylene resin used in the present invention include crystalline polypropylene, block copolymers of propylene and ethylene, random copolymers, graft copolymers alone or in mixtures, or blends containing these as main components with other polymers. be able to. Examples of inorganic powder fillers include calcium carbonate, talc, calcium silicate, calcium sulfate, calcium sulfite, magnesium carbonate, clay, aluminum hydroxide, calcium hydroxide, glass powder, asbestos, and silica powder. Examples of the agent include wood flour, cellulose fiber, synthetic fiber, and melamine powder. Note that these fillers can be used alone or in combination. Examples of organic peroxides include 1,3-bis-
(t-butylperoxy-isopropyl)benzene, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2.
5-di(t-butylperoxy)hexyne-3,
dialkyl peroxide such as dicumyl peroxide, t-butyl hydroperoxide,
Examples include hydroperoxides such as cymene hydroperoxide. In addition, as a lubricant, as a result of intensive study from the viewpoint of preventing bleeding, fatty acids such as stearic acid and palmitic acid; lead stearate, dibasic lead stearate, cadmium stearate, barium stearate, calcium stearate, zinc stearate, etc. metal salts of fatty acids; fatty acid esters such as butyl stearate, cetyl palmitate, stearic acid monoglyceride have been found to be particularly useful. Among these, fatty acid esters do not cause any discoloration and are extremely weather resistant. In addition, additives such as antioxidants and light stabilizers can be added as appropriate. The blending ratio of each of the above components in the polypropylene resin composition of the present invention is (a) polypropylene resin
(b) 5 to 400 parts by weight, preferably 10 to 400 parts by weight of inorganic powder filler and/or organic filler per 100 parts by weight
200 parts by weight, (c) 0.0001 to 5 parts by weight of organic peroxide,
Preferably 0.001 to 2 parts by weight and (d) 0.01 to 2 parts by weight of lubricant.
It is blended in an amount of 5 parts by weight, preferably 0.05 to 2 parts by weight. The above components are melt-mixed at a temperature of 170 to 250°C for 30 seconds to 10 minutes to obtain the desired composition. moreover,
Pelletize if necessary. When producing a molded article from this composition, methods such as direct molding, extrusion molding, and injection molding can be applied. The polypropylene resin composition of the present invention has good fluidity and excellent moldability, and the molded products obtained have few flow marks and weld marks, no bleeding of additives, excellent paintability, and moldability. There is no risk of corrosion. In addition, there are few sink marks and warpage, so the appearance is good. Therefore, it is suitable for manufacturing industrial materials, especially injection molded products such as electrical parts, automobile parts, and daily necessities. It is also possible to obtain thin-walled molded products or large-sized molded products. Next, the present invention will be explained in detail with reference to examples. Examples 1 to 6 Polypropylene, an inorganic powder filler, an organic filler, an organic peroxide, and a lubricant were mixed in the proportions shown in Table 1, and pelletized by the following method. (1) Knead the blend for 4 minutes at 200°C in an intermix (Examples 1, 2, 5 and 6) (2) Blend the blend in a V-type blender and then heat to 240°C in a single-screw extruder. (Example 3) (3) After blending the mixture with a Henschel mixer,
250℃ using a CCM twin-screw continuous kneader (manufactured by Chuo Kikai Co., Ltd.)
(Example 4) Test pieces were prepared by injection molding using the pellets thus obtained, and their physical properties were measured. on the other hand,
Spiral flow length molded using an Archimedean spiral flow mold with an injection molding machine at a cylinder temperature of 215°C (200°C for Example 6 and Comparative Example 7), an injection pressure of 800 Kg/cm 2 and a mold temperature of 50°C. The moldability was evaluated by measuring the hardness. In addition, injection molding
A box-shaped molded product of 100 x 150 x 40 mm and a wall thickness of 1.5 mm was molded, the minimum filling pressure required for molding was determined, and the moldability was evaluated.The gate was a pin gate with a diameter of 1 mm at the center of the bottom. The results are shown in Table-1. Comparative Examples 1-7 The same procedures as Examples 1-6 were carried out except that no organic peroxide was blended. The results are shown in Table-1. The physical properties shown in Table 1 were measured by the following method. Tensile strength: ASTM D-638 Tensile modulus: ASTM D-638 Impact strength: ASTM D-256 From Example 2 and Comparative Example 2, even when comparing pellets with almost the same melt index, spiral flow, molding pressure ( filling pressure),
It is clear from the appearance that the composition of the present invention has excellent moldability.

【表】【table】

【表】【table】

Claims (1)

【特許請求の範囲】 1 (a)ポリプロピレン系樹脂100重量部に対し、
(b)無機粉状充填剤および/また有機充填剤5〜
400重量部、(c)有機過酸化物0.0001〜5重量部お
よび(d)脂肪酸、脂肪酸の金属塩、脂肪酸エステル
のうちから選ばれた少なくとも1種の滑剤0.01〜
5重量部を溶融混合してなるポリプロピレン系樹
脂組成物。 2 溶融混合を170〜250℃の温度で30秒〜10分間
行なう特許請求の範囲第1項記載のポリプロピレ
ン系樹脂組成物。
[Claims] 1 (a) For 100 parts by weight of polypropylene resin,
(b) Inorganic powder filler and/or organic filler 5~
400 parts by weight, (c) 0.0001 to 5 parts by weight of organic peroxide, and (d) 0.01 to 0.01 parts by weight of at least one lubricant selected from fatty acids, metal salts of fatty acids, and fatty acid esters.
A polypropylene resin composition obtained by melt-mixing 5 parts by weight. 2. The polypropylene resin composition according to claim 1, which is melt-mixed at a temperature of 170 to 250°C for 30 seconds to 10 minutes.
JP3887079A 1979-03-31 1979-03-31 Polypropylene resin composition Granted JPS55131032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3887079A JPS55131032A (en) 1979-03-31 1979-03-31 Polypropylene resin composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3887079A JPS55131032A (en) 1979-03-31 1979-03-31 Polypropylene resin composition

Publications (2)

Publication Number Publication Date
JPS55131032A JPS55131032A (en) 1980-10-11
JPS6136788B2 true JPS6136788B2 (en) 1986-08-20

Family

ID=12537239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3887079A Granted JPS55131032A (en) 1979-03-31 1979-03-31 Polypropylene resin composition

Country Status (1)

Country Link
JP (1) JPS55131032A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611783A1 (en) 2018-08-13 2020-02-19 Toyota Jidosha Kabushiki Kaisha Electrode for secondary battery and secondary battery
EP3637514A1 (en) 2018-10-09 2020-04-15 Toyota Jidosha Kabushiki Kaisha Electrode for secondary battery and secondary battery

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245638A (en) * 1985-08-23 1987-02-27 Idemitsu Petrochem Co Ltd Polyolefin resin composition

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852837A (en) * 1971-11-08 1973-07-25
JPS4856749A (en) * 1971-11-20 1973-08-09
JPS5610347B2 (en) * 1972-09-25 1981-03-07
JPS5913524B2 (en) * 1974-12-25 1984-03-30 三菱レイヨン株式会社 Polyolefin thermoplastic resin composition
JPS5392856A (en) * 1977-01-26 1978-08-15 Hitachi Ltd Polyolefin resin composition
JPS53149240A (en) * 1977-06-01 1978-12-26 Mitsui Petrochem Ind Ltd Production of thermoplastic elastomer composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611783A1 (en) 2018-08-13 2020-02-19 Toyota Jidosha Kabushiki Kaisha Electrode for secondary battery and secondary battery
EP3637514A1 (en) 2018-10-09 2020-04-15 Toyota Jidosha Kabushiki Kaisha Electrode for secondary battery and secondary battery

Also Published As

Publication number Publication date
JPS55131032A (en) 1980-10-11

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