JPH06306180A - Production of vulcanized fluororubber molding - Google Patents

Production of vulcanized fluororubber molding

Info

Publication number
JPH06306180A
JPH06306180A JP12062093A JP12062093A JPH06306180A JP H06306180 A JPH06306180 A JP H06306180A JP 12062093 A JP12062093 A JP 12062093A JP 12062093 A JP12062093 A JP 12062093A JP H06306180 A JPH06306180 A JP H06306180A
Authority
JP
Japan
Prior art keywords
fluororubber
molding
vulcanization
parts
hexafluoropropylene
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
Application number
JP12062093A
Other languages
Japanese (ja)
Inventor
Takeo Kaneko
武夫 金子
Kazutoshi Sugitani
和俊 杉谷
Masayuki Saito
正幸 斉藤
Hiroyuki Hirai
浩之 平井
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.)
AGC Inc
Original Assignee
Asahi Glass 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP12062093A priority Critical patent/JPH06306180A/en
Publication of JPH06306180A publication Critical patent/JPH06306180A/en
Pending legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To obtain the molding without making any defective product by vulcanizing and molding a fluororubber in a mold. CONSTITUTION:A process for molding a fluororubber obtained by copolymerizing vinylidene fluoride with hexafluoropropylene or a fluororubber obtained by copolymerizing vinylidene fluoride with hexafluoropropylene and tetrafluoroethylene in a mold by polyol vulcanization, wherein an organic quat. ammonium salt is used as the vulcanization accelerator.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はフッ素ゴム加硫成形品の
製造方法に関し、さらに詳しくはフッ素ゴムのポリオー
ル加硫における改善された成形品の製造方法に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a vulcanized fluororubber molded article, and more particularly to a method for producing an improved vulcanized fluororubber molded article.

【0002】[0002]

【従来の技術】フッ素ゴムは優れた耐熱性、耐油性、耐
薬品性等を有することから、自動車部品等を中心に各種
の工業分野で広く用いられているが、ポリヒドロキシ化
合物を加硫剤として用いるポリオール加硫においては、
金型を用いて圧縮成形、射出成形またはトランスファー
成形を行う際に、成形品のウェルド部分等に加硫不足ま
たは発泡がおこり成形不良となることがあった。
Fluorine rubber is widely used in various industrial fields such as automobile parts because it has excellent heat resistance, oil resistance and chemical resistance. In the polyol vulcanization used as
When compression molding, injection molding or transfer molding is performed using a mold, insufficient vulcanization or foaming may occur in the weld portion of the molded product, resulting in defective molding.

【0003】[0003]

【発明が解決しようとする課題】本発明の目的は、ポリ
オール加硫成形時における成形不良のないフッ素ゴム成
形品の製造方法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 method for producing a fluororubber molded article which is free from molding defects during polyol vulcanization molding.

【0004】[0004]

【課題を解決するための手段】本発明者らは、前記の問
題点を解決するために鋭意検討を重ねた結果、有機4級
アンモニウム塩が加硫促進剤として有効であることを見
いだし、この知見に基づいて本発明を完成するに至っ
た。
As a result of intensive studies to solve the above problems, the present inventors have found that an organic quaternary ammonium salt is effective as a vulcanization accelerator. The present invention has been completed based on the findings.

【0005】すなわち、本発明は、フッ化ビニリデンお
よびヘキサフルオロプロピレンを共重合して得られるフ
ッ素ゴム、またはフッ化ビニリデン、ヘキサフルオロプ
ロピレンおよびテトラフルオロエチレンを共重合して得
られるフッ素ゴムの成形において、該フッ素ゴムをポリ
オール加硫により金型を用いて圧縮成形、射出成形また
はトランスファー成形を行う際に加硫促進剤として有機
4級アンモニウム塩を用いることを特徴とするフッ素ゴ
ム加硫成形品の製造方法である。
That is, the present invention relates to the molding of a fluororubber obtained by copolymerizing vinylidene fluoride and hexafluoropropylene, or a fluororubber obtained by copolymerizing vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene. A fluorinated rubber vulcanization molded article characterized by using an organic quaternary ammonium salt as a vulcanization accelerator when compression-molding, injection-molding or transfer-molding the fluororubber using a mold by polyol vulcanization It is a manufacturing method.

【0006】本発明において用いられるフッ素ゴムは、
フッ化ビニリデンおよびヘキサフルオロプロピレンを重
量比40/60〜80/20の割合で共重合して得られ
るフッ素ゴム、または前記割合のフッ化ビニリデンおよ
びヘキサフルオロプロピレンに、さらにテトラフルオロ
エチレンをフッ化ビニリデン、ヘキサフルオロプロピレ
ンおよびテトラフルオロエチレンの合計重量に基づき3
5重量%以下の割合で共重合して得られるフッ素ゴムで
あり、これらは単独で、または2種以上の混合物として
用いられる。また、これらのフッ素ゴムの分子量や分子
量分布は特に制限されるものではなく、用途や成形条件
等に応じ、適宜選定される。
The fluororubber used in the present invention is
Fluorine rubber obtained by copolymerizing vinylidene fluoride and hexafluoropropylene in a weight ratio of 40/60 to 80/20, or vinylidene fluoride and hexafluoropropylene in the above proportions, and tetrafluoroethylene and vinylidene fluoride. , 3 based on the total weight of hexafluoropropylene and tetrafluoroethylene
It is a fluororubber obtained by copolymerization at a ratio of 5% by weight or less, and these are used alone or as a mixture of two or more kinds. Further, the molecular weight and the molecular weight distribution of these fluororubbers are not particularly limited, and are appropriately selected depending on the application, molding conditions and the like.

【0007】本発明において加硫促進剤として用いられ
る有機4級アンモニウム塩の具体例として、テトラブチ
ルアンモニウムブロマイド、テトラブチルアンモニウム
クロライド、硫酸水素テトラブチルアンモニウム、フェ
ニルトリメチルアンモニウムクロライド、テトラメチル
アンモニウムクロライド、8−ベンジル1,8−ジアザ
ビシクロ(5,4,0)−7−ウンデセニウムクロライ
ド、p−トルエンスルホン酸8−ベンジル1,8−ジア
ザビシクロ(5,4,0)−7−ウンデセニウム等が挙
げられる。
Specific examples of the organic quaternary ammonium salt used as a vulcanization accelerator in the present invention include tetrabutylammonium bromide, tetrabutylammonium chloride, tetrabutylammonium hydrogen sulfate, phenyltrimethylammonium chloride, tetramethylammonium chloride, 8 -Benzyl 1,8-diazabicyclo (5,4,0) -7-undecenium chloride, 8-benzyl 1,8-diazabicyclo (5,4,0) -7-undecenium p-toluenesulfonate and the like can be mentioned. .

【0008】これらの化合物は単独で、または2種以上
の混合物として用いられる。また、これらの化合物は、
従来一般的に用いられている他の加硫促進剤と併用して
もよい。フッ素ゴム100重量部に対するこれらの有機
4級アンモニウム塩の使用量は通常、0.05〜3重量
部、好ましくは0.1〜1.5重量部の範囲である。
These compounds are used alone or as a mixture of two or more kinds. In addition, these compounds are
It may be used in combination with other conventionally used vulcanization accelerators. The amount of these organic quaternary ammonium salts used with respect to 100 parts by weight of the fluororubber is usually 0.05 to 3 parts by weight, preferably 0.1 to 1.5 parts by weight.

【0009】本発明においてフッ素ゴムの加硫剤となる
ポリヒドロキシ化合物については、従来公知の化合物は
すべて使用可能であり、通常、ビスフェノールAF、ビ
スフェノールA、ハイドロキノン、カテコール、含フッ
素脂肪族ポリヒドロキシ化合物等が好ましく用いられ
る。フッ素ゴム100重量部に対するポリヒドロキシ化
合物使用量は0.1〜10重量部、好ましくは0.5〜
5重量部の範囲である。
With regard to the polyhydroxy compound used as the vulcanizing agent for the fluororubber in the present invention, all the conventionally known compounds can be used, and normally, bisphenol AF, bisphenol A, hydroquinone, catechol, and fluorine-containing aliphatic polyhydroxy compounds. Etc. are preferably used. The amount of polyhydroxy compound used per 100 parts by weight of fluororubber is 0.1 to 10 parts by weight, preferably 0.5 to
It is in the range of 5 parts by weight.

【0010】また、本発明においてフッ素ゴムのポリオ
ール加硫時に受酸剤として用いられる金属酸化物または
金属水酸化物については、従来公知の化合物はすべて使
用可能であり、通常、酸化マグネシウム、酸化カルシウ
ム、酸化亜鉛、酸化鉛、水酸化カルシウム、水酸化マグ
ネシウム等が用いられ、特に、酸化マグネシウムと水酸
化カルシウムとを併用することが好ましい。フッ素ゴム
100重量部に対する金属酸化物または金属水酸化物の
使用量は0.5〜30重量部、好ましくは1〜25重量
部の範囲である。
Further, as the metal oxide or metal hydroxide used as an acid acceptor during the vulcanization of the fluororubber polyol in the present invention, all the conventionally known compounds can be used, usually magnesium oxide and calcium oxide. , Zinc oxide, lead oxide, calcium hydroxide, magnesium hydroxide and the like are used, and it is particularly preferable to use magnesium oxide and calcium hydroxide in combination. The amount of the metal oxide or metal hydroxide used with respect to 100 parts by weight of the fluororubber is 0.5 to 30 parts by weight, preferably 1 to 25 parts by weight.

【0011】また、本発明に用いられるフッ素ゴムに
は、これらの各成分の他に必要に応じて、他の成分、例
えばカーボンブラック、シリカ、クレー、ケイソウ土、
炭酸カルシウム、フッ化カルシウム、硫酸バリウム等の
充填剤や補強剤、加工助剤、内部離型剤、接着促進剤、
可塑剤、着色剤等を配合することが可能である。また、
天然ゴムや他の合成ゴム、熱可塑性樹脂や熱硬化性樹脂
等とブレンドすることも可能である。
In addition to these components, the fluororubber used in the present invention may optionally contain other components such as carbon black, silica, clay, diatomaceous earth,
Fillers and reinforcing agents such as calcium carbonate, calcium fluoride, barium sulfate, processing aids, internal release agents, adhesion promoters,
It is possible to add a plasticizer, a coloring agent and the like. Also,
It is also possible to blend with natural rubber, other synthetic rubber, thermoplastic resin, thermosetting resin, or the like.

【0012】本発明に用いられるフッ素ゴムは、前述の
各成分をロールやニーダー等の通常のゴムの混練装置に
より均一に混合することにより得られる。こうして得ら
れたフッ素ゴム組成物は、プレス成形、射出成形やトラ
ンスファー成形等の金型を用いて成形する際に、通常の
成形とまったく同様にして成形することが可能であり、
しかも金型内での成形品のウェルド部分等の加硫不足や
発泡等の成形不良の発生が防止され、良好な成形品が得
られる。
The fluororubber used in the present invention can be obtained by uniformly mixing the above-mentioned components with a usual rubber kneading device such as a roll or a kneader. The fluororubber composition thus obtained can be molded by press molding, injection molding, transfer molding, or the like using a mold, in exactly the same manner as normal molding.
In addition, insufficient vulcanization of the welded portion of the molded product in the mold and occurrence of molding defects such as foaming can be prevented, and a good molded product can be obtained.

【0013】加硫条件は、成形しようとするものの形状
や条件により適宜決められるものであるが、おおむね、
100℃〜250℃で30秒〜24時間の範囲である。
また、得られた加硫物の特性を安定化させるために2次
加硫を行ってもよい。その場合の条件としては、おおむ
ね、150℃〜300℃で30分〜48時間程度であ
る。
The vulcanization conditions are appropriately determined depending on the shape and conditions of the product to be molded, but in general,
It is in the range of 30 seconds to 24 hours at 100 ° C to 250 ° C.
Further, secondary vulcanization may be performed in order to stabilize the properties of the obtained vulcanizate. In that case, the conditions are about 150 ° C. to 300 ° C. and about 30 minutes to 48 hours.

【0014】[0014]

【実施例】次に、本発明を実施例によりさらに詳細に説
明する。なお、実施例中、部とは重量部を示す。
EXAMPLES Next, the present invention will be described in more detail by way of examples. In the examples, “part” means “part by weight”.

【0015】実施例1 乳化重合法により、フッ化ビニリデン/ヘキサフルオロ
プロピレン=60/40(重量比)、固有粘度[η]=
0.55のフッ素ゴムを得た。
Example 1 By emulsion polymerization, vinylidene fluoride / hexafluoropropylene = 60/40 (weight ratio), intrinsic viscosity [η] =
A fluororubber of 0.55 was obtained.

【0016】このフッ素ゴム100部に対してMTカー
ボン30部、ビスフェノールAF1.5部、硫酸水素テ
トラブチルアンモニウム0.5部、キョーワマグ150
(協和化学工業製酸化マグネシウム)3部、およびカル
ビット(近江化学製水酸化カルシウム)6部を2ロール
により均一に混合してフッ素ゴム組成物を得た。ここで
得られたフッ素ゴム組成物を厚さ5mmにシートアウト
し、幅2cm、長さ18cmに裁断してプレフォームを
得た。
To 100 parts of this fluororubber, 30 parts of MT carbon, 1.5 parts of bisphenol AF, 0.5 part of tetrabutylammonium hydrogen sulfate, 150 parts of Kyowamag
3 parts of (Kyowa Chemical Industry's magnesium oxide) and 6 parts of carbite (Omi Chemical's calcium hydroxide) were uniformly mixed with 2 rolls to obtain a fluororubber composition. The fluororubber composition obtained here was sheeted out to a thickness of 5 mm and cut into a width of 2 cm and a length of 18 cm to obtain a preform.

【0017】次に、ここで得られたプレフォーム3個を
内径38mm、太さ2mmのO−リング9個取りの金型
に横3列にO−リングのキャビティ上に仕込み、170
℃で20分プレス加硫した。同様にして、O−リングを
90個加硫成形した。これらのO−リングはいずれも加
硫不足や発泡のない良好な成形品であった。
Next, the three preforms obtained here were charged into a mold of nine O-rings having an inner diameter of 38 mm and a thickness of 2 mm in three rows on the O-ring cavities, and 170
It was press-vulcanized at 20 ° C. for 20 minutes. Similarly, 90 O-rings were vulcanized and molded. All of these O-rings were good molded products without insufficient vulcanization or foaming.

【0018】実施例2 実施例1の硫酸水素テトラブチルアンモニウムのかわり
に8−ベンジル1,8−ジアザビシクロ(5,4,0)
−7−ウンデセニウムクロライドを用いること以外は実
施例1とまったく同様にしてO−リングを90個加硫成
形したところ、これらのO−リングはいずれも加硫不足
や発泡のない良好な成形品であった。
Example 2 Instead of the tetrabutylammonium hydrogen sulfate of Example 1, 8-benzyl 1,8-diazabicyclo (5,4,0) was used.
90 O-rings were vulcanized and molded in exactly the same manner as in Example 1 except that -7-undecenium chloride was used. All of these O-rings were excellently molded without vulcanization deficiency or foaming. It was a product.

【0019】比較例1 実施例1の硫酸水素テトラブチルアンモニウムのかわり
にトリフェニルベンジルホスホニウムクロライドを用い
ること以外は実施例1とまったく同様にしてO−リング
を90個加硫成形したところ、90個すべてにおいてウ
ェルド部分が加硫不足により成形不良をおこした。
Comparative Example 1 90 O-rings were vulcanized and molded in exactly the same manner as in Example 1 except that triphenylbenzylphosphonium chloride was used instead of tetrabutylammonium hydrogensulfate in Example 1, and 90 O-rings were vulcanized. In all of them, the welded part caused defective molding due to insufficient vulcanization.

【0020】[0020]

【発明の効果】本発明はフッ素ゴムを金型を用いて成形
する際に、成形不良のない成形品の製造方法を提供する
ものであることから工業的価値の極めて高いものであ
る。本発明により得られるフッ素ゴムの成形品は、その
優れた特性に基づき、自動車や航空機等の輸送機関のO
−リング、オイルシール、ガスケット、シール材、ダイ
ヤフラム等に、また、化学プラントや食品プラント等の
同様な部品や一般工業部品に幅広く使用される。
INDUSTRIAL APPLICABILITY The present invention is extremely high in industrial value because it provides a method for producing a molded product which is free from molding defects when molding fluororubber using a mold. The fluororubber molded article obtained according to the present invention is based on its excellent characteristics and is suitable for use in vehicles such as automobiles and airplanes.
-Widely used for rings, oil seals, gaskets, sealing materials, diaphragms, etc., as well as similar parts in chemical plants, food plants, etc. and general industrial parts.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 平井 浩之 千葉県市原市五井海岸10番地 旭硝子株式 会社千葉工場内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroyuki Hirai 10 Goi Kaigan, Ichihara City, Chiba Asahi Glass Co., Ltd. Chiba Factory

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】フッ化ビニリデンおよびヘキサフルオロプ
ロピレンを共重合して得られるフッ素ゴム、またはフッ
化ビニリデン、ヘキサフルオロプロピレンおよびテトラ
フルオロエチレンを共重合して得られるフッ素ゴムの成
形において、該フッ素ゴムをポリオール加硫により金型
を用いて圧縮成形、射出成形またはトランスファー成形
を行う際に加硫促進剤として有機4級アンモニウム塩を
用いることを特徴とするフッ素ゴム加硫成形品の製造方
法。
1. A fluororubber obtained by copolymerizing vinylidene fluoride and hexafluoropropylene, or a fluororubber obtained by copolymerizing vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene. A method for producing a fluororubber vulcanization molded article, characterized in that an organic quaternary ammonium salt is used as a vulcanization accelerator when performing compression molding, injection molding or transfer molding by using a mold for polyol vulcanization.
JP12062093A 1993-04-23 1993-04-23 Production of vulcanized fluororubber molding Pending JPH06306180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12062093A JPH06306180A (en) 1993-04-23 1993-04-23 Production of vulcanized fluororubber molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12062093A JPH06306180A (en) 1993-04-23 1993-04-23 Production of vulcanized fluororubber molding

Publications (1)

Publication Number Publication Date
JPH06306180A true JPH06306180A (en) 1994-11-01

Family

ID=14790748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12062093A Pending JPH06306180A (en) 1993-04-23 1993-04-23 Production of vulcanized fluororubber molding

Country Status (1)

Country Link
JP (1) JPH06306180A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7279530B2 (en) 2003-04-21 2007-10-09 Nok Corporation Method for producing low friction fluorine rubber crosslinked body
US7671133B2 (en) 2003-06-09 2010-03-02 Yamauchi Corporation Vulcanized fluorine rubber and cushioning material for heat press containing same
WO2019070040A1 (en) 2017-10-06 2019-04-11 Agc株式会社 Fluorine-containing copolymer composition and metal-rubber layered body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7279530B2 (en) 2003-04-21 2007-10-09 Nok Corporation Method for producing low friction fluorine rubber crosslinked body
US7671133B2 (en) 2003-06-09 2010-03-02 Yamauchi Corporation Vulcanized fluorine rubber and cushioning material for heat press containing same
WO2019070040A1 (en) 2017-10-06 2019-04-11 Agc株式会社 Fluorine-containing copolymer composition and metal-rubber layered body

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