JPS59149936A - Rubber composition - Google Patents
Rubber compositionInfo
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- JPS59149936A JPS59149936A JP2381083A JP2381083A JPS59149936A JP S59149936 A JPS59149936 A JP S59149936A JP 2381083 A JP2381083 A JP 2381083A JP 2381083 A JP2381083 A JP 2381083A JP S59149936 A JPS59149936 A JP S59149936A
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- cold resistance
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Abstract
Description
【発明の詳細な説明】
本発明は耐寒性、耐油性、難燃性にすぐれたゴム組成物
に関し、詳しくは、アクリロニトリル・ブタジェン共重
合体ゴムまたはアクリロニトリル・ブタジェンゴムとポ
リブタジェンゴムを主体ゴムとして、これらのゴム分に
有機ハロゲン化難燃剤、可塑剤および三酸化アンチモン
をそれぞれ特定範囲内で配合し、さらに所望により特定
量以下の塩素化ポリエチレンを配合することにより、耐
油性、耐寒性、難燃性の緒特性を同時に満足するゴム組
成物に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber composition with excellent cold resistance, oil resistance, and flame retardancy, and more specifically, the present invention relates to a rubber composition having excellent cold resistance, oil resistance, and flame retardancy, and more specifically, a rubber composition containing acrylonitrile-butadiene copolymer rubber or acrylonitrile-butadiene rubber and polybutadiene rubber as the main rubber. By blending organic halogenated flame retardants, plasticizers, and antimony trioxide within specific ranges with these rubber components, and further blending chlorinated polyethylene in a specific amount or less if desired, oil resistance, cold resistance, and resistance to The present invention relates to a rubber composition that also satisfies flammability properties.
ベルトコンベア等のベルト、ホース、工業用部品におい
ては、苛酷な条件下で使用されるものも少なくなく、特
に耐油性、耐寒性、難燃性の３特性を兼備したゴム材料
が要求されるようになってきている。しかしながら、こ
れら３特性は互いに相反する特性であるためにこれら３
特性を兼備したゴム材料は得られていない。Belts such as belt conveyors, hoses, and industrial parts are often used under harsh conditions, and rubber materials that have the three characteristics of oil resistance, cold resistance, and flame retardance are particularly required. It is becoming. However, these three characteristics are contradictory to each other, so these three characteristics
A rubber material with both properties has not been obtained.
すなわち、ベルト、ホース、工業用部品等に使用される
製品においては多くは耐油性を必要とするが、一般に耐
油性をもつゴムは分子内に極性基を有しており耐寒性は
悪い傾向にある。例えば耐油性ゴムとして極性基（アク
リロニトリル）を有するアクリロニトリル・ブタジェン
共重合体ゴム（ＮＢＲ）が使われていたが、ＮＯＲは耐
寒性に劣るという欠点かあ−る。このため耐寒性を向上
させるために、ＮＢＲに脆化点の低いポリブタジェンゴ
ム（ＢＲ）が混合されるが、ＳＲは耐油性が低いという
欠点を有する。このようにゴム分の組合せだけでは耐油
性、耐寒性を兼備させることは困難であった。In other words, many products used for belts, hoses, industrial parts, etc. require oil resistance, but rubber that is generally oil resistant has polar groups in its molecules and tends to have poor cold resistance. be. For example, acrylonitrile-butadiene copolymer rubber (NBR) having a polar group (acrylonitrile) has been used as an oil-resistant rubber, but NOR has the disadvantage of poor cold resistance. Therefore, in order to improve cold resistance, polybutadiene rubber (BR) with a low embrittlement point is mixed with NBR, but SR has the disadvantage of low oil resistance. In this way, it has been difficult to achieve both oil resistance and cold resistance just by combining rubber components.
さらに、例えばコンベアベルト等は耐油性、耐寒性の他
に難燃性をも要求される。ゴムまたはプラスチックを難
燃化するため有機系および／または無機系の難燃剤が使
用されている。ゴムを難燃化するためにはこれ虻の難燃
剤を多量に投入する必要がある。゛ゴム用の難燃剤はコ
スト等の点から塩素化パラフィン系を多用しているが、
この難燃剤の使用により難燃性については満足できるが
、塩素化パラフィンは脆化点を上げるため耐寒性を著し
く低下させるという欠点がある。塩素化パラフィン系以
外の難燃剤についても多量配合により耐寒性を阻害する
傾向がある。Furthermore, for example, conveyor belts and the like are required to have flame retardancy in addition to oil resistance and cold resistance. Organic and/or inorganic flame retardants are used to make rubber or plastic flame retardant. In order to make rubber flame retardant, it is necessary to add a large amount of flame retardant. Chlorinated paraffin-based flame retardants are often used for rubber flame retardants due to cost and other reasons.
Although flame retardance can be satisfied by using this flame retardant, chlorinated paraffin has the drawback of raising the embrittlement point and significantly lowering cold resistance. Flame retardants other than chlorinated paraffin types also tend to impair cold resistance when added in large amounts.
このように、耐油性と耐寒性、難燃性と耐寒性は相反す
る性質であり、耐油性、難燃性に優れ、かつ−５０℃の
極寒地でも使用に耐える耐寒性に優れたゴム組成物は未
だ得られていない。In this way, oil resistance and cold resistance, as well as flame retardance and cold resistance, are contradictory properties, and a rubber composition with excellent oil resistance, flame retardance, and cold resistance that can be used even in extremely cold regions of -50°C. I haven't gotten anything yet.
本発明は、耐寒性、耐油性、難燃性を有するゴム組成物
を得・ることを目的とするものであり、特にベルト、ホ
ース、工業用部品のゴム材料として利用される。The object of the present invention is to obtain a rubber composition that has cold resistance, oil resistance, and flame retardancy, and is particularly useful as a rubber material for belts, hoses, and industrial parts.
本発明のこの目的は以下に示すゴム組成物によって達成
される。This object of the invention is achieved by the rubber composition shown below.
すなわち本発明は、ニトリル含有量が１５〜３０重量％
のアクリロニトリル・ブタジェン共重合体ゴム（ＮＢＲ
）を７０〜１００重量部、ポリブタジェンゴム（ＢＲ）
３０〜Ｏ重量部を含むゴム分１００重量部に対し、常温
で同体の有機ハロゲン化難燃剤２〜３０重量部、可塑剤
５〜４０重屋部、塩素化ポリエチレン０〜６０重量部、
三酸化アンチモン２〜１０重員部配合することを特徴と
するゴム組成物にある。That is, in the present invention, the nitrile content is 15 to 30% by weight.
Acrylonitrile-butadiene copolymer rubber (NBR
), 70 to 100 parts by weight, polybutadiene rubber (BR)
For 100 parts by weight of rubber containing 30 to 0 parts by weight, 2 to 30 parts by weight of organic halogenated flame retardant, 5 to 40 parts by weight of plasticizer, 0 to 60 parts by weight of chlorinated polyethylene,
A rubber composition characterized by containing 2 to 10 parts by weight of antimony trioxide.
本発明において、ゴム分１００重量部中のＮＢＲの含有
量は７０〜１００重量部であり、ＢＲの含有量は３０〜
０重和部である。ＮＢＲの含有量か７０Ｍ量部未満およ
びＢＲの含有量が３０重量ＥＩＸを越える場合には耐油
性が低下し好ましくない。In the present invention, the content of NBR in 100 parts by weight of rubber is 70 to 100 parts by weight, and the content of BR is 30 to 100 parts by weight.
It is 0 weight sum part. If the NBR content is less than 70 M parts and the BR content exceeds 30 parts by weight EIX, the oil resistance will deteriorate, which is undesirable.
また、本発明で使用するＮＢＲはニトリル含有量が１５
へ・３０重２％の範囲にあることが必要で、ニトリル含
有量が３０重量％を越えると耐油性は向上するが耐寒性
は低下するため好ましくない。Furthermore, the NBR used in the present invention has a nitrile content of 15
It is necessary that the nitrile content be in the range of 30% by weight and 2% by weight; if the nitrile content exceeds 30% by weight, oil resistance will improve but cold resistance will decrease, which is not preferable.
本発明に使用される有機ハロゲン化難燃剤とはデカブロ
モジフェニルエーテル、エチレンどステトラブロモフタ
ールイミド、ヘキサブロモフタールイミド、ヘキサブロ
モベンゼン、トリブロモフェノール、パークロロシクロ
ペンタデカン、テトラブロムエタン、テトラブロムブタ
ン等の常温で固体の塩素および／または臭素を含む有機
系の難燃剤であり、その配合量はゴム分１０’０！４量
部に対し、２〜３０重ω部である。有機ハロゲン化難燃
剤の配合量が２重量部より少ないと難燃性が低下し、３
０重量部を越えると耐寒性が低下する。The organic halogenated flame retardants used in the present invention are decabromodiphenyl ether, ethylene, tetrabromophthalimide, hexabromophthalimide, hexabromobenzene, tribromophenol, perchlorocyclopentadecane, tetrabromoethane, tetra It is an organic flame retardant containing chlorine and/or bromine that is solid at room temperature, such as bromobutane, and its compounding amount is 2 to 30 parts by weight per 10'0!4 parts of rubber. If the amount of the organic halogenated flame retardant is less than 2 parts by weight, the flame retardance will decrease,
If it exceeds 0 parts by weight, cold resistance will decrease.
また、可塑剤としてはジオクチルアジペート、ジオクチ
ルセバケート、ジブチルグリコールアジペート、トリオ
クチルフタレート、トリオクチルセバケート等低温特性
の良い可塑剤が好ましく使用される。可塑剤の配合量は
ゴム分１００重量部に対し、５〜４０重量部であり、そ
の配合量が５重量部未満では耐寒性が悪く、４０重量部
を越えると加硫物性、特に硬さおよび引張強さが低下し
てしまう。Further, as the plasticizer, a plasticizer having good low temperature properties such as dioctyl adipate, dioctyl sebacate, dibutyl glycol adipate, trioctyl phthalate, trioctyl sebacate, etc. is preferably used. The amount of plasticizer blended is 5 to 40 parts by weight per 100 parts by weight of rubber. If the blended amount is less than 5 parts by weight, cold resistance will be poor, and if it exceeds 40 parts by weight, the vulcanized physical properties, especially hardness and Tensile strength decreases.
本発明において、塩素化ポリエチレンは任意成分であり
、その配合量はゴム分１００重量部に対し０〜６０重量
部であるが、塩素化ポリエチレンは加硫剤の選択により
ＮＢＲおよびＢ’Ｒと共加硫することが可能であるが、
良好な耐寒性および難燃性を得るためには配合剤として
加える必要がある。その際の好ましい配合量としては１
０〜６０重量部、更に好ましくは２０〜４０重量部であ
る。In the present invention, chlorinated polyethylene is an optional component, and its blending amount is 0 to 60 parts by weight per 100 parts by weight of rubber, but chlorinated polyethylene can be used together with NBR and B'R depending on the selection of the vulcanizing agent. Although it is possible to vulcanize,
It must be added as a compounding agent to obtain good cold resistance and flame retardancy. In that case, the preferred blending amount is 1
The amount is 0 to 60 parts by weight, more preferably 20 to 40 parts by weight.
塩素化ポリエチレンは上記範囲内で配合した場合には、
耐寒性、耐油性、難燃性とも良好であるが、塩素化ポリ
エチレンの配合量がが６０重゛量部を越えると耐油性が
低下し−Ｃしまう。When chlorinated polyethylene is blended within the above range,
It has good cold resistance, oil resistance, and flame retardancy, but if the amount of chlorinated polyethylene exceeds 60 parts by weight, the oil resistance decreases and -C occurs.
また、三酸化アンチモンはゴム分１００重量部に対し、
２〜１０重量部配梁部間る。三酸化アンチモンの配合量
が２重量部未満では難燃性に劣り、１０重量部を越えて
配合してもそれほどの配合効果は発現しない。In addition, antimony trioxide per 100 parts by weight of rubber content,
2 to 10 parts by weight between the beam parts. If the amount of antimony trioxide added is less than 2 parts by weight, the flame retardance will be poor, and if it is added in an amount exceeding 10 parts by weight, no significant mixing effect will be achieved.
本発明のゴム組成物においては、前記した配合剤に加え
て、通常ゴム組成物に配合される配合剤、例えばカーボ
ーンブラック、酸化亜鉛、ステアリン酸、イオウ、加硫
促進剤等が必要に応じて適量配合される。In the rubber composition of the present invention, in addition to the above-mentioned compounding agents, compounding agents that are usually compounded in rubber compositions, such as carbon black, zinc oxide, stearic acid, sulfur, and vulcanization accelerators, may be added as necessary. Contains an appropriate amount.
以下、実施例および比較例に基づいて本発明を具体的に
説明する。なお、第１表中の配合値はすベーＣ重量部単
位である。The present invention will be specifically described below based on Examples and Comparative Examples. It should be noted that the formulation values in Table 1 are in units of parts by weight of C.
実施例１〜 および比較例１〜７
第１表に示す配合で加硫促進剤とイオウを除く各種配合
剤とゴム分をバンバリー型ミキサーで混合して得られた
マスターバッチに、加硫促進剤とイオウを加えて混合し
ゴム組成物を得た。Examples 1 to 7 and Comparative Examples 1 to 7 A vulcanization accelerator was added to a masterbatch obtained by mixing a vulcanization accelerator, various compounding ingredients except sulfur, and a rubber component in a Banbury type mixer according to the formulation shown in Table 1. and sulfur were added and mixed to obtain a rubber composition.
このゴム組成物を１４８”０１３０分の通常のプレス加
硫を行ない、加硫ゴムを得、加硫ゴムの特性を評価した
。加硫ゴムの特性評価は、ＪＩＳＨ硬さ、７引張り強さ
、破断伸び、耐寒性、耐油性、難燃性について行なった
。各特性の評価方法は次の通りである。This rubber composition was subjected to normal press vulcanization for 148"0130 minutes to obtain a vulcanized rubber, and the properties of the vulcanized rubber were evaluated. The properties of the vulcanized rubber were evaluated by JISH hardness, 7 tensile strength, The elongation at break, cold resistance, oil resistance, and flame retardance were evaluated.Evaluation methods for each property are as follows.
ＪＩＳ Ｈ硬さ、引張り強さおよび破断伸びはＪ’ｌ
Ｓ Ｋ ６３０’１に準拠して行ない、耐寒性は脆
化温度で評価し、ＪＩＳ、Ｋ ６３０１に従い衝撃脆
化試験機を使用して測定した。JIS H hardness, tensile strength and elongation at break are J'l
The test was carried out in accordance with S K 630'1, and cold resistance was evaluated using the embrittlement temperature and measured using an impact embrittlement tester in accordance with JIS K 6301.
耐油性はＪＩＳ軽油１号油で実施し、室温、１６８時間
後における体積変化率が４０％以下の場合に良好（０）
とし、それを越える場合を不良（Ｘ）とした。Oil resistance was measured using JIS diesel oil No. 1, and was evaluated as good (0) if the volume change rate after 168 hours at room temperature was 40% or less.
If it exceeds this value, it is considered defective (X).
また、難燃性はＪＩＳ Ｋ、６３２４の方法に準じて
、厚さ５ｍｍ、幅２５＋１１１１１の短冊状のサンプル
を使用し、着火時間３０秒後の燃焼時間が１０秒以内の
場合を良好（０）とし、１０秒を越えた場合を不良（×
）とした。In addition, the flame retardance was evaluated according to the method of JIS K, 6324 using a strip-shaped sample with a thickness of 5 mm and a width of 25 + 11111. If the combustion time after 30 seconds of ignition time is within 10 seconds, it is evaluated as good (0). If the time exceeds 10 seconds, it is considered defective (×
).
それぞれの結果を第１表に示す。・
＊ １：ＤＮ ４０１、ニトリル含有量１８重量％、日
本ゼオン社製、＊２ ： Ｎ Ｉ ＰＯＬ１０４３、ニ
トリル含有量２９重量％、日本ゼオン社製、＊３：ＮＩ
ＰＯＬ Ｂ Ｒ１２２０、日本ゼオン社製、＊４：Ｎ
ＩＰＯ１１０４？、ニトリル含有量４１重量％、日本ゼ
オン社製、＊５：エラスレン３０１、昭和電工社製、＊
６：Ｎ−シクロへキシルベンゾチアジルスルフェンアミ
ド。The results are shown in Table 1. *1: DN 401, nitrile content 18% by weight, manufactured by Nippon Zeon Co., Ltd. *2: NI POL1043, nitrile content 29% by weight, manufactured by Nippon Zeon Co., Ltd. *3: NI
POL B R1220, manufactured by Zeon Corporation, *4:N
IPO1104? , nitrile content 41% by weight, manufactured by Nippon Zeon Co., Ltd., *5: Elasthren 301, manufactured by Showa Denko Co., Ltd., *
6: N-cyclohexylbenzothiazylsulfenamide.
第１表に示されるように、本発明のゴム組成物である実
施例１〜８はいずれも耐寒性、耐油性、難燃性に優れて
おり、加硫物性も好ましい範囲にある。このうち、実施
例２は塩素化ポリエチレンを未配合のゴム組成物である
が、塩素化ポリエチレンを配合したゴム組成物に比べて
やや耐寒性が劣るが許容範囲にある。また、実施例５〜
６はゴム分としてＮＢＲとＢＲを併用したゴム組成物で
あるが、ゴム分としてＮＢＲを単独配合したゴム組成物
と（よぼ同等の特性を示している。As shown in Table 1, all of Examples 1 to 8, which are the rubber compositions of the present invention, are excellent in cold resistance, oil resistance, and flame retardance, and the vulcanized physical properties are also within a preferable range. Among these, Example 2 is a rubber composition that does not contain chlorinated polyethylene, and although its cold resistance is slightly inferior to that of a rubber composition that contains chlorinated polyethylene, it is within an acceptable range. In addition, Example 5~
No. 6 is a rubber composition containing a combination of NBR and BR as the rubber component, and exhibits almost the same characteristics as a rubber composition containing NBR alone as the rubber component.
これに対して、比較例１は従来、ベルトコンベア等に使
用されるゴム組成物であるが、耐寒性に著しく劣る。ま
た、比較例２はゴム分であるＳＲの含有量が多すぎるた
め耐油性が悪く、比較例３は塩素化ポリエチレンの配合
量が多すぎるため、同様に耐油性に劣る。比較例４は有
機ハロゲン化難燃剤の配合量が多すぎるため耐寒性が悪
くなり、一方、比較例５は三酸化アンチモン未配合のた
め、難燃性が劣る。さらに比較例６は可塑剤を多く配合
したため、加硫物性、特にＪＩＳ Ｈ硬さ、引張り強
さに劣る。比較例７は、使用するＮＢＲのニトリル含有
率が多いたため、耐寒性に著しく劣る。On the other hand, Comparative Example 1 is a rubber composition conventionally used for belt conveyors and the like, but it is significantly inferior in cold resistance. In addition, Comparative Example 2 has poor oil resistance because the content of SR, which is a rubber component, is too large, and Comparative Example 3 similarly has poor oil resistance because the amount of chlorinated polyethylene blended is too large. Comparative Example 4 had poor cold resistance because the amount of organic halogenated flame retardant was too large, while Comparative Example 5 had poor flame retardancy because antimony trioxide was not mixed. Furthermore, since Comparative Example 6 contained a large amount of plasticizer, it was inferior in vulcanized physical properties, especially JIS H hardness and tensile strength. In Comparative Example 7, the NBR used had a high nitrile content, so its cold resistance was significantly inferior.
以上説明のごとく、ＮＢＲまたはＮＢＲとＢＲを主体ゴ
ムとして、これらのゴム分に有機ハロゲン化難燃剤、可
塑剤および三酸化アンチモンをそれぞれ特定範囲内で配
合し、さらに所望により塩素化ポリエチレンを特定量以
下配合してなる本発明のゴム組成物は、耐油性、耐寒性
、難燃性の諸特性を同時に満足するのみならず、引張り
強さ、破断伸び等の加硫物性も損わないことから、ベル
トコンベア等のベルト、ホース、工業用部品等のゴム材
料として好適に利用される。As explained above, NBR or NBR and BR are used as the main rubber, organic halogenated flame retardants, plasticizers, and antimony trioxide are blended within specific ranges, and chlorinated polyethylene is added in a specific amount if desired. The rubber composition of the present invention comprising the following compounds not only satisfies various properties such as oil resistance, cold resistance, and flame retardance, but also does not impair vulcanized physical properties such as tensile strength and elongation at break. It is suitably used as a rubber material for belts such as belt conveyors, hoses, industrial parts, etc.
特許出願人 横浜ゴム株式会社 代理人 弁理士 伊東辰雄 代理人 弁理士 伊東哲也Patent applicant: Yokohama Rubber Co., Ltd. Agent: Patent Attorney Tatsuo Ito Agent: Patent Attorney Tetsuya Ito
Claims (1)
トリル・ブタジェン共重合体ゴムを単独または７０重量
部以上含むゴム分１００重量部に対し、常温で固体の有
機ハロゲン化難燃剤２〜３０重量部、可塑剤５〜４０重
量部、塩素化ポリエチレン０〜６０重量部、三酸化アン
デモ２２〜１０重量部配合することを特徴とするゴム組
成物。 ２、ニトリル含有量が１５〜３０重量％のアクリロニト
リル・ブタジェン共重合体ゴムを７０重量部以上、ポリ
ブタジェンゴム３０重量部以下を含むゴム分１００重量
部に対し、常温で固体の有機ハロゲン化難燃剤２〜３０
重量部、可塑剤５〜４０重量部、塩素化ポリエチレンＯ
〜６０重量部、三酸化アンデモ２２〜１０重量部配合す
ることを特徴と′するゴム組成物。[Scope of Claims] For 100 parts by weight of rubber containing acrylonitrile-butadiene copolymer rubber having a 1,21-lyl content of 15 to 30% by weight alone or at least 70 parts by weight, an organic halogen that is solid at room temperature is added. 1. A rubber composition comprising 2 to 30 parts by weight of a chlorinated flame retardant, 5 to 40 parts by weight of a plasticizer, 0 to 60 parts by weight of chlorinated polyethylene, and 22 to 10 parts by weight of Andemo trioxide. 2. For 100 parts by weight of rubber containing 70 parts by weight or more of acrylonitrile-butadiene copolymer rubber with a nitrile content of 15 to 30% by weight and 30 parts by weight or less of polybutadiene rubber, organic halogenation which is solid at room temperature is applied. Flame retardant 2-30
Parts by weight, 5 to 40 parts by weight of plasticizer, chlorinated polyethylene O
60 parts by weight and 22 to 10 parts by weight of Andemo trioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2381083A JPS59149936A (en) | 1983-02-17 | 1983-02-17 | Rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2381083A JPS59149936A (en) | 1983-02-17 | 1983-02-17 | Rubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59149936A true JPS59149936A (en) | 1984-08-28 |
Family
ID=12120686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2381083A Pending JPS59149936A (en) | 1983-02-17 | 1983-02-17 | Rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59149936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265423A (en) * | 2005-03-25 | 2006-10-05 | Yokohama Rubber Co Ltd:The | Rubber composition for steep slope conveyor belt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521060A (en) * | 1978-07-31 | 1980-02-14 | Matsushita Electric Ind Co Ltd | Electrostatic recording body |
-
1983
- 1983-02-17 JP JP2381083A patent/JPS59149936A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521060A (en) * | 1978-07-31 | 1980-02-14 | Matsushita Electric Ind Co Ltd | Electrostatic recording body |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265423A (en) * | 2005-03-25 | 2006-10-05 | Yokohama Rubber Co Ltd:The | Rubber composition for steep slope conveyor belt |
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