JPH0633345B2 - Polypropylene composition - Google Patents
Polypropylene compositionInfo
- Publication number
- JPH0633345B2 JPH0633345B2 JP63319368A JP31936888A JPH0633345B2 JP H0633345 B2 JPH0633345 B2 JP H0633345B2 JP 63319368 A JP63319368 A JP 63319368A JP 31936888 A JP31936888 A JP 31936888A JP H0633345 B2 JPH0633345 B2 JP H0633345B2
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- weight
- parts
- friction
- polypropylene
- 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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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は摩擦摩耗特性に優れたポリプロピレン組成物に
関する。TECHNICAL FIELD The present invention relates to a polypropylene composition having excellent friction and wear characteristics.
ポリプロピレン樹脂は、その優れた剛性、加工性、耐熱
性、機械的特性等により機械、電気・電子分野等におい
て、種々の成形品に適用されている。しかし、摩擦摩耗
特性が悪いため摺動部品への適用ができなかった。この
ような問題点を解決する手段として、各種滑剤やフッソ
樹脂を添加する方法が一般的に行なわれている。しか
し、かかる組成物は摩擦摩耗特性の改良効果が十分でな
く、一層の改良が望まれていた。Polypropylene resin has been applied to various molded products in the fields of machinery, electrical / electronics, etc. due to its excellent rigidity, workability, heat resistance, mechanical properties and the like. However, the friction and wear characteristics were poor, so it could not be applied to sliding parts. As a means for solving such a problem, a method of adding various lubricants and fluorine resin is generally performed. However, such a composition does not have a sufficient effect of improving the friction and wear characteristics, and further improvement has been desired.
本発明者等は、上記問題を解決すべく鋭意検討した。そ
の結果、ポリプロピレンに特定の化合物を添加すること
により、摩擦摩耗特性の優れたポリプロピレン組成物が
得られることを見出し、本発明を提案するに至った。即
ち、本発明はポリプロピレン１００重量部、平均分子量
100,000以上のオルガノポリシロキサン0.5〜２０重量部
及びジベンジリデンソルビトール類0.05〜2.0重量部よ
りなるポリプロピレン組成物である。The present inventors diligently studied to solve the above problems. As a result, they have found that a polypropylene composition having excellent friction and wear characteristics can be obtained by adding a specific compound to polypropylene, and have thus proposed the present invention. That is, the present invention is 100 parts by weight of polypropylene, average molecular weight
A polypropylene composition comprising 0.5 to 20 parts by weight of 100,000 or more organopolysiloxane and 0.05 to 2.0 parts by weight of dibenzylidene sorbitols.
本発明において、ポリプロピレンは、プロピレンの単独
重合体、５０モル％以上のプロピレンとエチレン、ブテ
ン−１等のプロピレン以外のα−オレフィンとのブロッ
ク共重合体、ランダム共重合体、グラフト共重合体等の
共重合体、及びこれらの混合物等が用いられる。In the present invention, polypropylene is a homopolymer of propylene, a block copolymer of 50 mol% or more of propylene and an α-olefin other than propylene such as ethylene and butene-1, a random copolymer, a graft copolymer and the like. And copolymers thereof are used.
また、本発明で使用するオルガノポリシロキサンは平均
分子量が100,000以上であることが重要である。即ち、
オルガノポリシロキサンの平均分子量が100,000より小
さいと、摩擦摩耗特性の改良効果の持続性がなく、本発
明の目的を達成できない。本発明においては、オルガノ
ポリシロキサンの平均分子量は、得られるポリプロピレ
ン組成物の摩擦摩耗特性の向上の観点から、200,000〜
1,000,000の範囲であることが好ましい。It is important that the organopolysiloxane used in the present invention has an average molecular weight of 100,000 or more. That is,
When the average molecular weight of the organopolysiloxane is less than 100,000, the effect of improving the friction and wear characteristics is not sustained, and the object of the present invention cannot be achieved. In the present invention, the average molecular weight of the organopolysiloxane is 200,000-from the viewpoint of improving the friction and wear properties of the resulting polypropylene composition.
It is preferably in the range of 1,000,000.
本発明で使用されるオルガノポリシロキサンの種類は、
公知のものが何ら制限なく使用される。例えば、ジメチ
ルポリシロキサン、ジエチルポリシロキサン、メチルエ
チルポリシロキサン及びジフェニルポリシロキサン等を
挙げることができる。オルガノポリシロキサンの使用量
は、ポリプロピレン１００重量部に対して0.5〜２０重
量部、好ましくは２〜１５重量部である。添加量が0.5
重量部未満では摩擦摩耗特性の改良が十分ではなく、２
０重量部を越えて添加しても摩擦摩耗特性に対する効果
が頭打ちとなり、経済的に不利となるばかりでなく、物
性の低下を招く傾向にある。The type of organopolysiloxane used in the present invention is
Known ones are used without any limitation. For example, dimethyl polysiloxane, diethyl polysiloxane, methyl ethyl polysiloxane, diphenyl polysiloxane, etc. can be mentioned. The amount of organopolysiloxane used is 0.5 to 20 parts by weight, preferably 2 to 15 parts by weight, based on 100 parts by weight of polypropylene. 0.5 added
If the amount is less than 1 part by weight, the friction and wear characteristics are not sufficiently improved.
Even if added in an amount of more than 0 parts by weight, the effect on the friction and wear characteristics will reach a peak, which is not only economically disadvantageous, but also tends to lead to deterioration of physical properties.
さらに、本発明ではジベンジリデンソルビトール類を併
用することが重要である。ジベンジリデンソルビトール
類としては、1.3，2.4−ジベンジリデンソルビトール；
1.3−クロルベンジリデン−2.4−メチルベンジリデンソ
ルビトール；1.3，2.4−ジ（メチルベンジリデン）ソル
ビトール、1.3，2.4−ジ（エチルベンジリデン）ソルビ
トール等のジ（アルキルベンジリデン）ソルビトールが
挙げられるが、そのうち特に1.3，2.4−ジ（メチルベン
ジリデン）ソルビトールが前記組み合わせにおいて好適
である。Further, in the present invention, it is important to use dibenzylidene sorbitols in combination. The dibenzylidene sorbitols include 1.3,2.4-dibenzylidene sorbitol;
1.3-chlorobenzylidene-2.4-methylbenzylidene sorbitol; 1.3,2.4-di (methylbenzylidene) sorbitol, 1.3,2.4-di (ethylbenzylidene) sorbitol and other di (alkylbenzylidene) sorbitols, among which 1.3,2.4 -Di (methylbenzylidene) sorbitol is preferred in the combination.
ジベンジリデンソルビトール類の使用量は、ポリプロピ
レン１００重量部に対して0.05〜2.0重量部、好ましく
は0.1〜1.0重量部である。使用量が0.05重量部未満では
オルガノポリシロキサンとの併用効果による摩擦摩耗特
性の改良結果が十分でなく、２重量部を越えて添加して
もその効果が頭打ちになり経済的に不利である。The amount of dibenzylidene sorbitol used is 0.05 to 2.0 parts by weight, preferably 0.1 to 1.0 part by weight, based on 100 parts by weight of polypropylene. If the amount used is less than 0.05 parts by weight, the effect of improving the friction and wear characteristics due to the combined use effect with the organopolysiloxane is not sufficient, and if the addition amount exceeds 2 parts by weight, the effect will reach the ceiling and it is economically disadvantageous.
本発明に於いては、前記した各成分の他にポリブテン−
１をポリプロピレン１００重量部に対して１〜４０重量
部、好ましくは５〜３０重量部の範囲で添加すること
が、得られるポリプロピレン組成物を摺動材料として使
用したときの消音特性が改良されるために好ましい。ポ
リブテン−１としては、ブテン−１の単独重合体又はブ
テン−１が７０モル％以上の共重合体が用いられる。In the present invention, in addition to the above-mentioned components, polybutene-
The addition of 1 to 100 parts by weight of polypropylene in the range of 1 to 40 parts by weight, preferably 5 to 30 parts by weight improves the sound deadening characteristics when the obtained polypropylene composition is used as a sliding material. Preferred for. As the polybutene-1, a homopolymer of butene-1 or a copolymer of butene-1 of 70 mol% or more is used.
また、本発明に於いては、前記した各成分の他に無機充
填材をポリプロピレン１００重量部に対して１〜４０重
量部、好ましくは３〜３０重量部の範囲で添加すること
により、得られるポリプロピレン組成物に剛性を付与す
ることができる。無機充填材としては、炭酸カルシウ
ム、炭酸マグネシウム、水酸化カルシウム、水酸化マグ
ネシウム、タルク、クレー、シリカ、ガラス繊維、ホイ
スカー等の公知のものが何ら制限されずに採用される。
特にガラス繊維やホイスカー等の繊維状の無機充填材を
用いた場合には、得られるポリプロピレン組成物に高い
剛性を付与することができる。In addition, in the present invention, it is obtained by adding an inorganic filler in addition to the above-mentioned components in an amount of 1 to 40 parts by weight, preferably 3 to 30 parts by weight, based on 100 parts by weight of polypropylene. Rigidity can be imparted to the polypropylene composition. As the inorganic filler, known ones such as calcium carbonate, magnesium carbonate, calcium hydroxide, magnesium hydroxide, talc, clay, silica, glass fiber and whiskers are used without any limitation.
In particular, when a fibrous inorganic filler such as glass fiber or whiskers is used, high rigidity can be imparted to the obtained polypropylene composition.
本発明のポリプロピレン組成物には、摩擦摩耗特性に悪
影響を与えない範囲で、公知の添加剤、例えば、酸化防
止剤、光安定剤、帯電防止剤、顔料等を配合しても良
い。The polypropylene composition of the present invention may be blended with known additives such as antioxidants, light stabilizers, antistatic agents, pigments, etc. within a range that does not adversely affect the friction and wear characteristics.
以上の説明より理解されるごとく、本発明のポリプロピ
レン組成物は、摩擦摩耗特性性に優れており、ギヤ、カ
ム等の摺動部品に有用な組成物である。As can be understood from the above description, the polypropylene composition of the present invention is excellent in friction and wear properties and is a useful composition for sliding parts such as gears and cams.
以下、本発明を具体的に説明するため、実施例を示す
が、本発明はこれらの実施例に限定されるものではな
い。Examples are shown below for specifically explaining the present invention, but the present invention is not limited to these examples.
実施例１ メルトフローインデックス２０g/10minのプロピレンの
単独重合体１００重量部に、平均分子量が４５万のジメ
チルポリシロキサン及び1.3，2.4−ジ（メチルベンジリ
デン）ソルビトールを表−１の割合で添加した組成物を
作った。この組成物を原料にして、１５０ton射出成形
機で外径25.6mm、内径20.0mm、高さ１５mmの摩耗試験片
を作成した。摩耗試験は鈴木式摩擦摩耗試験機を使用
し、JIS K7218に従い、相手材料 で試験速度500mm/sec、試験荷重１kgｆ、試験距離３km
の試験条件で行い、試験前と試験後の試験片の重量差を
測定し、それを摩耗量とした。また、同時に摩擦係数の
測定も行った。結果を表−１に示した。Example 1 A composition in which 100 parts by weight of a propylene homopolymer having a melt flow index of 20 g / 10 min and dimethylpolysiloxane having an average molecular weight of 450,000 and 1.3,2.4-di (methylbenzylidene) sorbitol were added at a ratio shown in Table 1. I made a thing. Using this composition as a raw material, a wear test piece having an outer diameter of 25.6 mm, an inner diameter of 20.0 mm and a height of 15 mm was prepared with a 150 ton injection molding machine. For the abrasion test, Suzuki type friction and abrasion tester was used, and according to JIS K7218, mating material Test speed 500mm / sec, test load 1kgf, test distance 3km
The test piece was tested under the test conditions described in 1. above, and the weight difference between the test piece before and after the test was measured, and this was taken as the wear amount. At the same time, the coefficient of friction was also measured. The results are shown in Table-1.
実施例２ メルトフローインデックス２０g/10minのプロピレンの
単独重合体１００重量部に分子量３０万のジエチルポリ
シロキサン及び1.3，2.4−ジベンジリデンソルビトール
を表−２の割合で添加した組成物を作った。この組成物
を原料にして、実施例１と同様な方法で摩耗試験片を作
成し、同一条件で摩擦摩耗試験を行った。結果を表−２
に示した。 Example 2 A composition was prepared by adding 100 parts by weight of a propylene homopolymer having a melt flow index of 20 g / 10 min with diethylpolysiloxane having a molecular weight of 300,000 and 1.3,2.4-dibenzylidene sorbitol in a ratio shown in Table 2. Using this composition as a raw material, a wear test piece was prepared in the same manner as in Example 1, and a friction wear test was conducted under the same conditions. The results are shown in Table-2.
It was shown to.
実施例３ メルトフローインデックス２０g/10minのプロピレンの
単独重合体１００重量部に分子量４５万のジメチルポリ
シロキサン５重量部と表−３に示したジベンジリデンソ
ルビトール類0.3重量部を配合した組成物について、実
施例１と同様な方法で摩耗試験片を作成し、同一条件で
摩擦摩耗試験を行なった。その結果を表−３に示した。 Example 3 A composition obtained by mixing 100 parts by weight of a propylene homopolymer having a melt flow index of 20 g / 10 min with 5 parts by weight of dimethylpolysiloxane having a molecular weight of 450,000 and 0.3 part by weight of dibenzylidene sorbitols shown in Table 3 was used. A wear test piece was prepared in the same manner as in Example 1, and a friction wear test was conducted under the same conditions. The results are shown in Table-3.
実施例４ メルトフローインデックス２０g/10minのプロピレンの
単独重合体１００重量部に平均分子量４５万のジメチル
ポリシロキサン、1.32.4−ジ（メチルベンジリデン）ソ
ルビトール及びブテン−１の単独重合体を表−４の割合
で添加した組成物を作った。この組成物を原料にして、
実施例１と同様な方法で摩耗試験片を作成し、同一条件
で摩擦摩耗試験を行った。さらに１００×１００×2.0
ｔの試験片を作成し、振動減衰法（技報堂「騒音対策ハ
ンドブック」で強制振動時における損失係数の測定を行
った。 Example 4 100 parts by weight of a propylene homopolymer having a melt flow index of 20 g / 10 min and dimethylpolysiloxane having an average molecular weight of 450,000, 1.32.4-di (methylbenzylidene) sorbitol and butene-1 homopolymer are shown in Table-4. A composition was added at the ratio of. Using this composition as a raw material,
A wear test piece was prepared in the same manner as in Example 1, and a friction wear test was performed under the same conditions. Further 100 × 100 × 2.0
A test piece of t was prepared, and the loss coefficient during forced vibration was measured by the vibration damping method (Gihodo "Noise Countermeasure Handbook").
比較例 メルトフローインデックス２０g/10minのプロピレンの
単独重合体１００重量部に平均分子量が10,000のジメチ
ルポリシロキサン５重量部及び1.3，2.4−ジ（メチルベ
ンジリデン）ソルビトールを0.3重量部配合した組成物
について、実施例１と同様な方法で摩擦摩耗試験を行っ
た。その結果、摩耗量2.2mg、摩擦係数1.0であった。 Comparative Example A composition in which 100 parts by weight of a propylene homopolymer having a melt flow index of 20 g / 10 min and 5 parts by weight of dimethylpolysiloxane having an average molecular weight of 10,000 and 0.3 parts by weight of 1.3,2.4-di (methylbenzylidene) sorbitol were blended, A friction and wear test was conducted in the same manner as in Example 1. As a result, the amount of wear was 2.2 mg and the coefficient of friction was 1.0.
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 53/00 ＬＬＷ 7142−4Ｊ ＬＬＺ 7142−4Ｊ //(Ｃ０８Ｌ 23/10 83:04 23:20） (Ｃ０８Ｌ 51/06 83:04 23:20） (Ｃ０８Ｌ 53/00 83:04 23:20） Continuation of the front page (51) Int.Cl. 5 Identification number Reference number within the agency FI Technical display location C08L 53/00 LLW 7142-4J LLZ 7142-4J // (C08L 23/10 83:04 23:20) (C08L 51/06 83:04 23:20) (C08L 53/00 83:04 23:20)
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63319368A JPH0633345B2 (en) | 1988-12-20 | 1988-12-20 | Polypropylene composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63319368A JPH0633345B2 (en) | 1988-12-20 | 1988-12-20 | Polypropylene composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02166142A JPH02166142A (en) | 1990-06-26 |
| JPH0633345B2 true JPH0633345B2 (en) | 1994-05-02 |
Family
ID=18109371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63319368A Expired - Fee Related JPH0633345B2 (en) | 1988-12-20 | 1988-12-20 | Polypropylene composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633345B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2516283B2 (en) * | 1991-03-27 | 1996-07-24 | 株式会社トクヤマ | Method for producing polypropylene resin molded product |
| JP4889136B2 (en) * | 1999-12-09 | 2012-03-07 | 株式会社プライムポリマー | Propylene resin composition |
| JP7694137B2 (en) * | 2021-05-12 | 2025-06-18 | 東洋製罐グループホールディングス株式会社 | Propylene-based resin composition |
-
1988
- 1988-12-20 JP JP63319368A patent/JPH0633345B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02166142A (en) | 1990-06-26 |
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