JPH05339456A - Fluororubber composition - Google Patents
Fluororubber compositionInfo
- Publication number
- JPH05339456A JPH05339456A JP17939392A JP17939392A JPH05339456A JP H05339456 A JPH05339456 A JP H05339456A JP 17939392 A JP17939392 A JP 17939392A JP 17939392 A JP17939392 A JP 17939392A JP H05339456 A JPH05339456 A JP H05339456A
- Authority
- JP
- Japan
- Prior art keywords
- fluororubber
- composition
- rubber
- fuel oil
- dimethylsiloxane
- 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.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フッ素ゴム組成物に関
する。更に詳しくは、耐寒性および成形加工性を改善せ
しめたフッ素ゴム組成物に関する。FIELD OF THE INVENTION The present invention relates to a fluororubber composition. More specifically, it relates to a fluororubber composition having improved cold resistance and moldability.
【０００２】[0002]
【従来の技術】従来から、フッ素ゴムの低温特性を改良
する目的で、フッ素ゴムにシリコーンゴムまたはフロロ
シリコーンゴムをブレンドすることが行われている。し
かしながら、これらのブレンド系においては、それぞれ
相溶性の異なる重合体が用いられているため、十分な材
料特性が得られないばかりか、目的とする低温特性の改
良も著しい効果をあげるには至っていないのが実情であ
る。2. Description of the Related Art Conventionally, for the purpose of improving low temperature characteristics of fluororubber, blending of fluororubber with silicone rubber or fluorosilicone rubber has been carried out. However, in these blend systems, polymers having different compatibility are used, so that not only sufficient material properties cannot be obtained, but also improvement of intended low-temperature properties has not been achieved significantly. Is the reality.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、ブレ
ンド系のフッ素ゴム組成物であって、耐寒性および成形
加工性を改善せしめたもの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 blend type fluororubber composition having improved cold resistance and moldability.
【０００４】[0004]
【課題を解決するための手段】かかる本発明の目的は、
ジメチルシロキサン-メチルトリフルオロプロピルシロ
キサン-メチルビニルシロキサン共重合ゴムをフッ素ゴ
ムにブレンドしたフッ素ゴム組成物によって達成され
る。The object of the present invention is as follows.
It is achieved by a fluororubber composition in which a dimethylsiloxane-methyltrifluoropropylsiloxane-methylvinylsiloxane copolymer rubber is blended with a fluororubber.
【０００５】ジメチルシロキサン-メチルトリフルオロ
プロピルシロキサン-メチルビニルシロキサン共重合ゴ
ムとしては、低温特性と耐燃料油性とのバランスの観点
から、ジメチルシロキサンとメチルトリフルオロプロピ
ル(CF3CH2CH2-)シロキサンとが約10/90〜70/30のモル比
で共重合したものであって、そこに約0.05〜0.5モル%の
架橋性メチルビニルシロキサンを共重合させたものが用
いられる。As the dimethylsiloxane-methyltrifluoropropylsiloxane-methylvinylsiloxane copolymer rubber, dimethylsiloxane and methyltrifluoropropyl (CF 3 CH 2 CH 2- ) are used from the viewpoint of a balance between low temperature characteristics and fuel oil resistance. Siloxane is copolymerized at a molar ratio of about 10/90 to 70/30, and about 0.05 to 0.5 mol% of crosslinkable methyl vinyl siloxane is copolymerized therewith.
【０００６】これらの共重合シリコーンゴムがブレンド
されるフッ素ゴムとしては、共重合ゴムと共架橋性を有
する有機過酸化物架橋性のフッ素ゴム、例えば分子中に
反応性臭素基および/またはヨウ素基を有するフッ素ゴ
ムなどが用いられる。かかるフッ素ゴムは、炭素数2〜8
の含フッ素オレフィン、例えばフッ化ビニリデン、テト
ラフルオロエチレン、ヘキサフルオロプロペンなどを単
独重合または共重合、好ましくはフッ化ビニリデンを少
なくとも一種の他の含フッ素オレフィンと共重合させる
に際し、各種の含ハロゲン有機化合物連鎖移動剤の存在
下で重合させることにより得られる。共重合体中には、
パーフルオロ(アルキルビニルエ−テル)などを共重合さ
せることもできる。実際の使用に際しては、各種の市販
品をそのまま用いることができる。The fluororubber blended with these copolymerized silicone rubbers is an organic peroxide-crosslinkable fluororubber having a co-crosslinking property with the copolymer rubber, such as a reactive bromine group and / or iodine group in the molecule. A fluororubber having a is used. Such fluororubber has 2 to 8 carbon atoms.
Fluorine-containing olefins such as vinylidene fluoride, tetrafluoroethylene, hexafluoropropene, etc. are homopolymerized or copolymerized, preferably, when vinylidene fluoride is copolymerized with at least one other fluorine-containing olefin, various halogen-containing organic It is obtained by polymerizing in the presence of a compound chain transfer agent. In the copolymer,
It is also possible to copolymerize perfluoro (alkyl vinyl ether) or the like. In actual use, various commercially available products can be used as they are.
【０００７】これら両者よりなる組成物は、組成物中共
重合シリコーンゴムが約5〜90重量%、好ましくは約10〜
50重量%を占めるような割合で用いられる。組成物の調
製は、温度制御可能な混練設備、例えば油循環式熱ロー
ルなどを用いて混練することにより行われ、調製された
組成物は有機過酸化物によって共架橋される。その際、
トリアリルイソシアヌレ−トなどの共架橋剤を、組成物
100重量部当り約0.5〜5重量部程度用いることが好まし
い。The composition comprising both of these has a copolymer silicone rubber content of about 5 to 90% by weight, preferably about 10 to
It is used in such a proportion that it accounts for 50% by weight. The composition is prepared by kneading using a kneading facility whose temperature is controllable, for example, an oil circulation type hot roll, and the prepared composition is co-crosslinked with an organic peroxide. that time,
A co-crosslinking agent such as triallyl isocyanurate is added to the composition.
It is preferable to use about 0.5 to 5 parts by weight per 100 parts by weight.
【０００８】[0008]
【発明の効果】本発明に係るフッ素ゴム組成物は、次の
ような特徴を有している。 (1)従来のフッ素ゴム/フロロシリコーンゴムブレンド系
と比較して、低温特性改良の効果が高い。 (2)フッ素ゴム/シリコーンゴムブレンド系と比較して、
物性の低下、特に耐燃料油性の低下が少ない。 (3)過酸化物架橋フッ素ゴムの難点であった混練時の作
業性および成形加工時の金型離型性が大幅に改善され
る。The fluororubber composition according to the present invention has the following features. (1) Compared with the conventional fluororubber / fluorosilicone rubber blend system, the effect of improving low temperature characteristics is high. (2) Compared with fluororubber / silicone rubber blend system,
Less deterioration of physical properties, especially fuel oil resistance. (3) The workability at the time of kneading and the mold releasability at the time of molding, which were the drawbacks of the peroxide-crosslinked fluororubber, are significantly improved.
【０００９】[0009]
【実施例】次に、実施例について本発明を説明する。EXAMPLES The present invention will now be described with reference to examples.
【００１０】実施例１ フッ素ゴム(昭和電工・デュポン製品バイトンGF) 75重量部 共重合シリコーンゴム(組成モル比70/30/0.1) 25 〃 シリカ系充填剤(日本アエロジル製品アエロジル200) 10 〃 有機過酸化物(日本油脂製品パーヘキサ2・5B-40) 2 〃 トリアリルイソシアヌレ−ト(日本化成製品タイク) 2 〃Example 1 75 parts by weight of fluororubber (Viton GF from Showa Denko / Dupont Co., Ltd.) Copolymerized silicone rubber (molar composition ratio 70/30 / 0.1) 25 〃 Silica-based filler (Aerosil 200 manufactured by Nippon Aerosil Co., Ltd.) 10 〃 Organic Peroxide (Nippon Oil & Fat Products Perhexa 2.5B-40) 2〃 Triallyl isocyanurate (Nippon Kasei Product Tyk) 2〃
【００１１】以上の各成分をオープンロールで混練した
後、170℃で20分間圧縮成形して試験サンプルとし、次
のような試験および判定を行った。 材料物性試験：厚さ2mmのシートについて、JIS K-6301
およびASTM D-1329に準じ、硬さ、引張強さ、伸び、低
温性(TR-10)および耐燃料油性(燃料油Ｃ中に40℃で70時
間浸漬後の体積変化率)をそれぞれ測定した 作業性・加工性：ロール混練時の作業性および試験サン
プル作製時の金型離型性を触感により判定したAfter kneading each of the above components with an open roll, compression molding was carried out at 170 ° C. for 20 minutes to prepare a test sample, and the following tests and judgments were carried out. Material physical property test: JIS K-6301 for 2 mm thick sheets
And, according to ASTM D-1329, hardness, tensile strength, elongation, low temperature property (TR-10) and fuel oil resistance (volume change rate after immersion in fuel oil C at 40 ° C for 70 hours) were measured. Workability / workability: Workability during roll kneading and mold releasability during test sample preparation were judged by touch.
【００１２】実施例２ 実施例１において、フッ素ゴム量を50重量部、共重合シ
リコーンゴム量を50重量部にそれぞれ変更した。Example 2 In Example 1, the amount of fluororubber was changed to 50 parts by weight and the amount of copolymerized silicone rubber was changed to 50 parts by weight.
【００１３】比較例１ 実施例１において、フッ素ゴム量を100重量部に変更
し、共重合シリコーンゴム量を用いなかった。Comparative Example 1 In Example 1, the amount of fluororubber was changed to 100 parts by weight, and the amount of copolymerized silicone rubber was not used.
【００１４】比較例２ 実施例１において、共重合シリコーンゴムの代わりに、
同量のフロロシリコーンゴム(信越化学製品FE261U)が用
いられた。COMPARATIVE EXAMPLE 2 In Example 1, instead of the copolymerized silicone rubber,
The same amount of fluorosilicone rubber (Shin-Etsu Chemical FE261U) was used.
【００１５】比較例３ 実施例２において、共重合シリコーンゴムの代わりに、
同量のフロロシリコーンゴム(信越化学製品FE261U)が用
いられた。Comparative Example 3 In Example 2, instead of the copolymerized silicone rubber,
The same amount of fluorosilicone rubber (Shin-Etsu Chemical FE261U) was used.
【００１６】比較例４ 実施例１において、共重合シリコーンゴムの代わりに、
同量のシリコーンゴム(信越化学製品KE951U)が用いられ
た。COMPARATIVE EXAMPLE 4 In Example 1, instead of the copolymerized silicone rubber,
The same amount of silicone rubber (Shin-Etsu Chemical KE951U) was used.
【００１７】比較例５ 実施例２において、共重合シリコーンゴムの代わりに、
同量のシリコーンゴム(信越化学製品KE951U)が用いられ
た。Comparative Example 5 In Example 2, instead of the copolymerized silicone rubber,
The same amount of silicone rubber (Shin-Etsu Chemical KE951U) was used.
【００１８】以上の各実施例および比較例で得られた結
果は、次の表に示される。 表 実施例 比 較 例 １ ２ １ ２ ３ ４ ５ [材料物性試験] 硬さ (JIS-A) 75 74 72 72 71 75 74 引張強さ(M Pa) 10.4 9.5 14.3 11.0 8.5 11.4 9.0 伸び (%) 300 280 350 330 300 340 340 低温性 (℃) -12 -25 -5 -6 -8 -6 -10 耐燃料油性 (%) +11 +20 +5 +13 +17 +50 +80 [作業性・加工性] ロール作業性 優 良 可 優 良 優 良 金型離型性 優 良 不可 優 良 優 良The results obtained in each of the above Examples and Comparative Examples are shown in the following table. Table Example Comparison Comparative example 1 2 1 2 3 4 5 [Material physical property test] Hardness (JIS-A) 75 74 72 72 71 75 74 Tensile strength (M Pa) 10.4 9.5 14.3 11.0 8.5 11.4 9.0 Elongation (%) 300 280 350 330 300 340 340 Low temperature (℃) -12 -25 -5 -6 -8 -6 -10 Fuel oil resistance (%) +11 +20 +5 +13 +17 +50 +80 [Workability ・Workability] Roll workability Good Good Good Good Good Mold Releaseability Good Good Good Good Good
【００１９】以上の結果から、次のようなことがいえ
る。 (1)比較例２〜３のフッ素ゴム/フロロシリコーンゴムブ
レンド系および比較例４〜５のフッ素ゴム/シリコーン
ゴムブレンド系では、低温性改良の効果が低く、また後
者ブレンド系においては、耐燃料油性を著しく悪化させ
ている。 (2)これに対し、実施例１〜２では、比較例１のフッ素
ゴム単体と比較して、耐燃料油性を殆んど悪化させるこ
となく、耐寒性(低温性)を大幅に改良することができ、
また成形加工性(作業性・加工性)の点でもすぐれてい
る。From the above results, the following can be said. (1) In the fluororubber / fluorosilicone rubber blend system of Comparative Examples 2 and 3 and the fluororubber / silicone rubber blend system of Comparative Examples 4 to 5, the effect of improving the low temperature property is low, and in the latter blend system, the fuel resistance is low. Oiliness is significantly deteriorated. (2) On the other hand, in Examples 1 and 2, the cold resistance (low temperature property) was significantly improved as compared with the fluororubber simple substance of Comparative Example 1 with almost no deterioration in fuel oil resistance. Can
It is also excellent in terms of moldability (workability / workability).
Claims (2)
ロプロピルシロキサン-メチルビニルシロキサン共重合
ゴムをフッ素ゴムにブレンドしてなるフッ素ゴム組成
物。1. A fluororubber composition prepared by blending a dimethylsiloxane-methyltrifluoropropylsiloxane-methylvinylsiloxane copolymer rubber with a fluororubber.
記載のフッ素ゴム組成物。2. The method according to claim 1, further comprising an organic peroxide.
The fluororubber composition described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17939392A JPH05339456A (en) | 1992-06-12 | 1992-06-12 | Fluororubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17939392A JPH05339456A (en) | 1992-06-12 | 1992-06-12 | Fluororubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05339456A true JPH05339456A (en) | 1993-12-21 |
Family
ID=16065085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17939392A Pending JPH05339456A (en) | 1992-06-12 | 1992-06-12 | Fluororubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05339456A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008045001A (en) * | 2006-08-11 | 2008-02-28 | Daikin Ind Ltd | Peroxide-cross-linkable composition and molded article comprizing the same, fuel penetration-resistant sealant |
| JP2020070326A (en) * | 2018-10-30 | 2020-05-07 | 三菱電線工業株式会社 | Uncrosslinked fluororubber composition and rubber product produced using the same |
| JP2021105179A (en) * | 2018-03-29 | 2021-07-26 | 三菱電線工業株式会社 | Uncrosslinked rubber composition, rubber product produced using the same, and method for producing the same |
-
1992
- 1992-06-12 JP JP17939392A patent/JPH05339456A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008045001A (en) * | 2006-08-11 | 2008-02-28 | Daikin Ind Ltd | Peroxide-cross-linkable composition and molded article comprizing the same, fuel penetration-resistant sealant |
| JP2021105179A (en) * | 2018-03-29 | 2021-07-26 | 三菱電線工業株式会社 | Uncrosslinked rubber composition, rubber product produced using the same, and method for producing the same |
| JP2020070326A (en) * | 2018-10-30 | 2020-05-07 | 三菱電線工業株式会社 | Uncrosslinked fluororubber composition and rubber product produced using the same |
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