JPH01269743A - heat resistant toothed belt - Google Patents
heat resistant toothed beltInfo
- Publication number
- JPH01269743A JPH01269743A JP9773888A JP9773888A JPH01269743A JP H01269743 A JPH01269743 A JP H01269743A JP 9773888 A JP9773888 A JP 9773888A JP 9773888 A JP9773888 A JP 9773888A JP H01269743 A JPH01269743 A JP H01269743A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tooth
- hydrogenated nitrile
- peroxide
- crosslinking agent
- 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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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】 童栗上■剋朋公団 本発明は耐熱性歯付きベルトに関する。[Detailed description of the invention] Dokurijo■Kokuho Corporation The present invention relates to a heat-resistant toothed belt.
従来旦伎街
従来、歯付きベルトは、多くの場合、クロロプレンゴム
から製造されているが、例えば、自動車分野においては
、近年、エンジンの高出力化、軽量化、小型化や、或い
は部品のコンパクト化や伝動伝達の多軸化等に伴って、
歯付きベルトが用いられる雰囲気温度の上昇が著しく、
クロロブレンゴムからなるベルトでは耐熱性が十分でな
くなり、かくして、従来よりも一層耐熱性にすぐれる歯
付きベルトの開発が強く要望されるに至っている。Conventionally, toothed belts have been manufactured from chloroprene rubber in many cases, but in recent years, for example, in the automobile field, engines have become more powerful, lighter, more compact, and parts have become more compact. With the increase in power transmission and multi-axis transmission,
The temperature of the atmosphere where toothed belts are used increases significantly,
Belts made of chloroprene rubber no longer have sufficient heat resistance, and there is therefore a strong demand for the development of toothed belts that have even better heat resistance than conventional belts.
そこで、例えば、特開昭５１−３６２４７号公報や特開
昭６０−１２１３４１号公報等に記載されているように
、近年、背ゴムや歯ゴムにクロロスルホン化ポリエチレ
ンゴムを用いる歯付きベルトや、特開昭６０−１７２７
４９号公報に記載されているように、水素化ニトリルゴ
ムの含イオウ架橋系ゴム組成物を用いる歯付きベルト等
が提案されているが、その耐熱性は、尚、十分であると
はいい難い。Therefore, in recent years, toothed belts using chlorosulfonated polyethylene rubber for back rubber and tooth rubber have been developed, as described in, for example, Japanese Patent Application Laid-open No. 51-36247 and Japanese Patent Application Laid-open No. 60-121341. Japanese Patent Publication No. 1727-1983
As described in Publication No. 49, a toothed belt etc. using a sulfur-containing crosslinked rubber composition of hydrogenated nitrile rubber has been proposed, but its heat resistance is still not sufficient. .
日が ンしようと る、 占
そこで、本発明者らは、上記した問題を解決するために
鋭意研咲した結果、歯付きベルトにおいて、背ゴム及び
歯ゴムに共架橋剤としての液状の末端カルボキシル化１
．２−ポリブタジエンを含有する水素化ニトリルゴムの
パーオキサイド架橋系ゴム組成物を用いることが、歯付
きベルトの耐熱性、特に、耐熱老化性と耐熱走行寿命の
一層の改善に有効であることを見出して、本発明に至っ
たものである。As the sun approaches, the inventors of the present invention have conducted extensive research to solve the above-mentioned problems. As a result, the present inventors have developed a toothed belt using liquid terminal carboxyl as a co-crosslinking agent in the back rubber and the tooth rubber. Chemical 1
．． It has been discovered that the use of a peroxide crosslinked rubber composition of hydrogenated nitrile rubber containing 2-polybutadiene is effective in further improving the heat resistance of toothed belts, particularly in the heat aging resistance and heat-resistant running life of toothed belts. This led to the present invention.
シ 占を”°するための
本発明は、背ゴム、歯ゴム、及び歯ゴムに接着された底
帆布からなる歯付きベルトにおいて、背ゴム及び歯ゴム
が水素化ニトリルゴム１００ｇ当りにパーオキサイド０
． ＯＯ２〜０．０３モル及び共架橋剤としての分子量
５００〜５０００の末端カルボキシル化液状１．２−ポ
リブタジエン１〜７ｇを含有するパーオキサイド架橋系
水素化ニトリルゴム組成物からなることを特徴とする。The present invention provides a toothed belt consisting of a back rubber, a tooth rubber, and a bottom canvas bonded to the tooth rubber.
．． It is characterized by consisting of a peroxide crosslinked hydrogenated nitrile rubber composition containing 2 to 0.03 moles of OO and 1 to 7 g of terminally carboxylated liquid 1,2-polybutadiene having a molecular weight of 500 to 5,000 as a co-crosslinking agent.
本発明において用いる水素化ニトリルゴムは、ニトリル
ゴムが含有する二重結合を水素添加して、熱老化におけ
るイオウの再結合反応を起こり難くすることによって、
イオウの再結合反応に基づくゴム弾性の低下を防止し、
かくして、ニトリルゴムの利点である耐油性を保持しつ
つ、耐熱性を改善したゴムであって、本発明においては
、水素添加率が８０％以上、なかでも、水素添加率が９
５％以上、特に９８％以上の高水素化ニトリルゴムが好
適に用いられる。水素添加率が８０％よりも少ないとき
は、得られる歯付きベルトが尚、耐熱性に劣る。The hydrogenated nitrile rubber used in the present invention hydrogenates the double bonds contained in the nitrile rubber to make it difficult for the sulfur recombination reaction to occur during heat aging.
Prevents deterioration of rubber elasticity due to sulfur recombination reaction,
In this way, the rubber has improved heat resistance while maintaining the oil resistance which is an advantage of nitrile rubber.
Highly hydrogenated nitrile rubber of 5% or more, especially 98% or more is preferably used. When the hydrogenation rate is less than 80%, the resulting toothed belt still has poor heat resistance.
本発明においては、背ゴム及び歯ゴムとして、パーオキ
サイドの共架橋剤としての分子量５００〜５０００を有
する末端カルボキシル化液状ポリブタジェンを含有する
水素化ニトリルゴムのパーオキサイド架橋系ゴム組成物
が用いられる。パーオキサイド架橋剤としては、特に、
限定されるものではなく、例えば、ジクミルパーオキサ
イド、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（１
−ブチルパーオキシ）ヘキシン−３、ベンゾイルパーオ
キサイド、２．４−ジクロルジベンゾイルパーオキサイ
ド、ｔ−ブチルハイドロパーオキサイド、クメンハイド
ロパーオキサイド、ｔ−ブチルパーオキシベンゾエート
、２，５−ジメチル−２，５−ジ（ベンゾイルパーオキ
シ）ヘキサン等を挙げることができる。かかるパーオキ
サイド架橋剤は、水素化ニトリルゴム１００ｇについて
、０．００２〜０．０３モルの範囲で配合される。In the present invention, a peroxide crosslinked rubber composition of hydrogenated nitrile rubber containing terminal carboxylated liquid polybutadiene having a molecular weight of 500 to 5000 as a peroxide co-crosslinking agent is used as the back rubber and tooth rubber. As peroxide crosslinking agents, in particular,
Examples include, but are not limited to, dicumyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2,5-di(1
-butylperoxy)hexyne-3, benzoyl peroxide, 2,4-dichlorodibenzoyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, t-butyl peroxybenzoate, 2,5-dimethyl-2, Examples include 5-di(benzoylperoxy)hexane. The peroxide crosslinking agent is blended in an amount of 0.002 to 0.03 mol per 100 g of hydrogenated nitrile rubber.
更に、本発明においては、水素化ニトリルゴムのパーオ
キサイド架橋系ゴム組成物は、共架橋剤として、分子量
５００〜５０００の末端カルボキシル化液状１．２−ポ
リブタジエンを含有し、かかる液状１．２−ポリブタジ
エンは、水素化ニトリルゴム１００ｇについて、１〜７
ｇの範囲で配合される。特に、本発明においては、１．
２−結合が７０％以上である１、２−ポリブタジエンを
用いることが好ましい。Further, in the present invention, the peroxide crosslinked rubber composition of hydrogenated nitrile rubber contains terminally carboxylated liquid 1,2-polybutadiene having a molecular weight of 500 to 5,000 as a co-crosslinking agent. Polybutadiene is 1 to 7 per 100 g of hydrogenated nitrile rubber.
It is blended within the range of g. In particular, in the present invention, 1.
It is preferable to use 1,2-polybutadiene having 70% or more of 2-bonds.
パーオキサイド量が水素化ニトリルゴム１００ｇに対し
てＯ，ＯＯ２モルよりも少ないときは、架橋反応が十分
でなく、ベルトとしては、弾性率が低いために、負荷寿
命が悪く、実用が殆ど不可能である。他方、パーオキサ
イド量が０．０３モルよりも多いときは、ベルトの弾性
率が高すぎて、伸びが小さく、屈曲寿命かに劣る。同様
に、共架橋剤である液状１，２−ポリブタジエンも、そ
の配合量が水素化ニトリルゴム１００ｇに対して１ｇよ
りも少ないときは負荷特性が悪く、７ｇよりも多いとき
は、耐熱性及び屈曲寿命に劣る。When the amount of peroxide is less than 2 moles of O, OO per 100 g of hydrogenated nitrile rubber, the crosslinking reaction is insufficient and the belt has a low elastic modulus, so the load life is poor and it is almost impossible to put it into practical use. It is. On the other hand, when the amount of peroxide is more than 0.03 mol, the elastic modulus of the belt is too high, the elongation is small, and the flex life is poor. Similarly, when the amount of liquid 1,2-polybutadiene, which is a co-crosslinking agent, is less than 1 g per 100 g of hydrogenated nitrile rubber, the load characteristics are poor, and when it is more than 7 g, the heat resistance and bending properties are poor. Inferior lifespan.
前述したように、本発明においては、水素添加率が８０
％以上、好ましくは９５％以上、最も好ましくは９８％
以上の高水素化ニトリルゴムが用いられる。このように
、水素化ニトリルゴムの水素化率が高いときは、通常は
、水素化ニトリルゴムのパーオキサイド系架橋剤による
架橋効率が悪くなり、その架橋のためには、大量のパー
オキサイド系架橋剤の使用を必要とし、その結果として
、加硫ゴムの屈曲性や引裂抵抗が著しく低下する。As mentioned above, in the present invention, the hydrogenation rate is 80
% or more, preferably 95% or more, most preferably 98%
The above highly hydrogenated nitrile rubbers are used. As described above, when the hydrogenation rate of hydrogenated nitrile rubber is high, the crosslinking efficiency of the hydrogenated nitrile rubber by the peroxide crosslinking agent usually decreases, and a large amount of peroxide crosslinking is required for the crosslinking. necessitates the use of agents, resulting in a significant reduction in the flexibility and tear resistance of the vulcanized rubber.
しかしながら、本発明によれば、パーオキサイド架橋系
水素化ニトリルゴム組成物として、高水素化率の水素化
ニトリルゴムを用いると共に、共架橋剤として、前記所
定の液状１．２−ポリブタジエンを所定量配合し、かか
るゴム組成物を帆布に加硫接着することによって、背ゴ
ム及び歯ゴムが高耐熱性のみならず、高弾性率を有して
、耐屈曲性にすぐれるので、得られる歯付きベルトは、
走行寿命が著しく向上する。However, according to the present invention, hydrogenated nitrile rubber with a high hydrogenation rate is used as the peroxide crosslinked hydrogenated nitrile rubber composition, and a predetermined amount of the predetermined liquid 1,2-polybutadiene is used as the co-crosslinking agent. By vulcanizing and adhering such a rubber composition to canvas, the back rubber and tooth rubber have not only high heat resistance but also a high modulus of elasticity and excellent bending resistance. The belt is
Driving life is significantly improved.
歯ゴムと底帆布の接着に用いられる接着ゴムは、水素化
ニトリルゴムのパーオキサイド架橋系ゴム組成物、含イ
オウ架橋系ゴム組成物のいずれであってもよく、水素化
ニトリルゴム、パーオキサイド系架橋剤又は含イオウ架
橋剤、及び所謂ＨＲＨ配合を構成するための所要の添加
剤からなる。The adhesive rubber used to bond the tooth rubber and the bottom canvas may be either a peroxide crosslinked rubber composition of hydrogenated nitrile rubber or a sulfur-containing crosslinked rubber composition. It consists of a crosslinking agent or a sulfur-containing crosslinking agent and the necessary additives to constitute the so-called HRH formulation.
ここに、上記パーオキサイド系架橋剤としては、前述し
た架橋剤が適宜に用いられ、また、含イオウ架橋剤とし
ては、イオウのほか、例えば、４，４゛−ジチオビスモ
ルホリン、テトラメチルチウラムジスルフィド、テトラ
メチルチウラムモノスルフィド、２−（４−モルホリノ
ジチオ）ベンゾチアゾール等が用いられ、
また、ＨＲＨ配合としては、通常、シリカ、メチレン受
容体及びメチレン供与体が用いられる。Here, as the peroxide-based crosslinking agent, the above-mentioned crosslinking agent is used as appropriate, and as the sulfur-containing crosslinking agent, in addition to sulfur, for example, 4,4'-dithiobismorpholine, tetramethylthiuram disulfide, etc. , tetramethylthiuram monosulfide, 2-(4-morpholinodithio)benzothiazole, etc., and as the HRH compound, silica, a methylene acceptor, and a methylene donor are usually used.
かかるメチレン受容体及びメチレン供与体としては、従
来より知られているものが任意に用いられるが、代表的
には、例えば、メチレン受容体としてレゾルシノールや
その誘導体、メチレン供与体としてヘキサメチレンテト
ラミンやその誘導体が用いられる。Any conventionally known methylene acceptor and methylene donor can be used, but typically, for example, resorcinol or its derivatives are used as the methylene acceptor, and hexamethylenetetramine or its derivatives are used as the methylene donor. Derivatives are used.
このように、水素化ニトリルゴム、パーオキサイド系架
橋剤又は含イオウ架橋剤、及びＨＲＨ配合を含む接着ゴ
ムは、これらを水素化ニトリルゴムが未加硫の状態で適
宜の有機溶剤に溶解させてなる所謂糊ゴムであって、通
常、水素化ニトリルゴム１００重量部に対して、パーオ
キサイド系架橋剤０．５〜８重量部又は含イオウ架橋剤
０．５〜１重量部、シリカ１〜２０重量部、メチレン受
容体１〜１５重量部及びメチレン供与体１〜１５重量部
を含有する。有機溶剤としては、例えば、メチルエチル
ケトンが好ましく用いられるが、これに限定されるもの
ではない。In this way, adhesive rubber containing hydrogenated nitrile rubber, a peroxide-based crosslinking agent or a sulfur-containing crosslinking agent, and an HRH compound can be obtained by dissolving these in an appropriate organic solvent while the hydrogenated nitrile rubber is unvulcanized. It is a so-called paste rubber, and usually contains 0.5 to 8 parts by weight of a peroxide crosslinking agent or 0.5 to 1 part by weight of a sulfur-containing crosslinking agent and 1 to 20 parts by weight of silica per 100 parts by weight of hydrogenated nitrile rubber. parts by weight, 1 to 15 parts by weight of methylene acceptor and 1 to 15 parts by weight of methylene donor. As the organic solvent, for example, methyl ethyl ketone is preferably used, but the organic solvent is not limited thereto.
溶剤は、ゴム組成物１００重量部に対して、通常、６０
０〜９００重量部の範囲で用いられる。The amount of solvent is usually 60 parts by weight per 100 parts by weight of the rubber composition.
It is used in a range of 0 to 900 parts by weight.
しかし、この溶剤量も特に限定されるものではなく、得
られる接着剤組成物の粘度が最適になるように選ばれる
。溶剤量が余りに少ないときは、得られる糊ゴムの粘度
が高すぎて、作業性が悪く、一方、溶剤量が余りに多い
ときは、ゴム糊の粘度が低すぎて、帆布を処理したとき
に帆布への付着量が少なく、帆布と歯ゴムとの間に強固
な接着を得ることができない。However, the amount of solvent is not particularly limited, and is selected so as to optimize the viscosity of the resulting adhesive composition. If the amount of solvent is too small, the viscosity of the resulting glue rubber will be too high, resulting in poor workability.On the other hand, if the amount of solvent is too large, the viscosity of the rubber glue will be too low, and the canvas will be difficult to work with when processed. The amount of adhesion to the canvas is small, making it impossible to obtain strong adhesion between the canvas and the tooth rubber.
更に、接着ゴムは、必要に応じて、充填剤、軟化剤、加
硫剤、加硫促進剤、加硫助剤、老化防止剤、加工助剤等
の添加剤を適宜に含有してしいてもよい。Furthermore, the adhesive rubber may contain additives such as fillers, softeners, vulcanizing agents, vulcanization accelerators, vulcanization aids, anti-aging agents, and processing aids, as necessary. Good too.
また、本発明においては、帆布としては、例えば、ナイ
ロン、アラミド等からなるものが用いられ、また、芯線
としては、例えば、ガラス、ナイロン、アラミド、ポリ
エステル等よりなるものが用いられるが、帆布及び芯線
共に、これら例示したものに限定されるものではない。Further, in the present invention, the canvas used is made of, for example, nylon, aramid, etc., and the core wire is made of, for example, glass, nylon, aramid, polyester, etc. Both core wires are not limited to those exemplified above.
本発明による歯付きベルトは、従来より知られている通
常の方法によって製造することができる。The toothed belt according to the invention can be manufactured by conventional methods known in the art.
即ち、前述した接着ゴムを塗布し、乾燥させた帆布をベ
ルトの歯溝形状を有する金型に巻き付け、その上に芯線
と、前述した液状１．２−ポリブタジエンを共架橋剤と
して含有する水素化ニトリルゴムのパーオキサイド架橋
系ゴム組成物の未加硫ゴムシートを巻き付け、圧力釜内
にて加圧成形加硫処理した後、輪切りすることによって
、歯付きベルトを得る。That is, a canvas coated with the above-mentioned adhesive rubber and dried is wrapped around a mold having the tooth groove shape of a belt, and then a core wire and a hydrogenation film containing the above-mentioned liquid 1,2-polybutadiene as a co-crosslinking agent are placed on top of the mold. A toothed belt is obtained by wrapping an unvulcanized rubber sheet of a nitrile rubber peroxide crosslinked rubber composition, subjecting it to pressure molding and vulcanization in a pressure cooker, and then cutting it into rings.
光肌勿肱果
以上のように、本発明による歯付きベルトは、背ゴム及
び歯ゴムが液状１，２−ポリブタジエンを共架橋剤とし
て含有する高水素化ニトリルゴムのパーオキサイド架橋
系ゴム組成物加硫物からなり、これが帆布に加硫接着さ
れている。As described above, the toothed belt according to the present invention has a peroxide crosslinked rubber composition of highly hydrogenated nitrile rubber in which the back rubber and the tooth rubber contain liquid 1,2-polybutadiene as a co-crosslinking agent. It is made of vulcanized material, which is vulcanized and bonded to canvas.
かかる歯付きベルトは、背ゴム及び歯ゴムが高弾性率を
有して、走行寿命が向上するのみならず、底帆布と歯ゴ
ムとが強力に接着され、且つ、その接着が経時安定性に
すぐれるので、耐熱性、特に、耐熱老化性及び耐熱走行
性にすぐれ、高温環境下においても高寿命を有する。In such a toothed belt, the back rubber and tooth rubber have a high elastic modulus, and not only the running life is improved, but also the bottom canvas and the tooth rubber are strongly bonded, and the bond is stable over time. Therefore, it has excellent heat resistance, especially heat aging resistance and heat running resistance, and has a long life even in high temperature environments.
実施±
以下に比較例と共に実施例を挙げて本発明を説明するが
、本発明はこれら実施例により何ら限定されるものでは
ない。EXAMPLES The present invention will be explained below by giving examples together with comparative examples, but the present invention is not limited by these examples in any way.
第１表に本実施例及び比較例にて用いる水素化ニトリル
ゴムのパーオキサイド架橋系ゴム組成物、水素化ニトリ
ルゴムの含イオウ架橋系ゴム組成物、及びクロロプレン
ゴム組成物の未加硫成分組成を示す。また、これら未加
硫ゴム及び加硫ゴムの特性を第１表に示す。Table 1 shows the unvulcanized component compositions of peroxide crosslinked rubber compositions of hydrogenated nitrile rubber, sulfur-containing crosslinked rubber compositions of hydrogenated nitrile rubber, and chloroprene rubber compositions used in the Examples and Comparative Examples. shows. Table 1 shows the properties of these unvulcanized rubbers and vulcanized rubbers.
これらゴム組成物を歯ゴム及び背ゴムに用い、他方、接
着ゴムをナイロン帆布に塗布、乾燥させた後、前記した
ように、この帆布をベルトの歯溝形状を有する金型に巻
き付け、その上に芯線であるガラス・コードと、上記背
ゴム及び歯ゴムのためのゴム組成物からなる未加硫シー
トを巻き付け、圧力釜内にて加圧成形加硫処理した後、
輪切りすることによって、歯付きベルトを製造した。These rubber compositions are used for the tooth rubber and the back rubber, and the adhesive rubber is applied to a nylon canvas and dried. As described above, this canvas is wrapped around a mold having the tooth groove shape of the belt, and then After wrapping a glass cord as a core wire and an unvulcanized sheet consisting of a rubber composition for the back rubber and tooth rubber, and performing pressure molding and vulcanization treatment in a pressure cooker,
A toothed belt was manufactured by cutting into rings.
これら歯付きベルトについて、耐熱走行試験及び負荷耐
久走行試験を行なって、それぞれ耐熱走行寿命及び負荷
耐久寿命を調べた。結果を第２表に示す。These toothed belts were subjected to a heat-resistant running test and a load-endurance running test to examine their heat-resistant running life and load-endurance life, respectively. The results are shown in Table 2.
耐熱走行試験は、駆動プーリーと従動ブーリーとの間に
アイドラー・プーリーを介在させて１９ｍｍ幅のベルト
を巻回し、駆動プーリー回転数３０００ｒｐｍ、ベルト
初張力１５ｋｇｆとし、無負荷下に雰囲気温度１４０°
Ｃでベルトを走行させ、走行開始時から背ゴム又は歯形
ゴム（歯元）にクラックが発生するまでの時間にて評価
した。The heat-resistant running test was conducted by winding a 19 mm wide belt with an idler pulley interposed between the drive pulley and the driven pulley, with the drive pulley rotation speed at 3000 rpm, initial belt tension at 15 kgf, and an ambient temperature of 140° under no load.
The belt was run at C, and the time from the start of running until cracks appeared in the back rubber or tooth-shaped rubber (tooth base) was evaluated.
また、負荷耐久試験は、駆動プーリーと従動プーリーと
の間に１０ｓ幅ベルトを巻回し、駆動プーリー回転数６
００Ｏｒｐｍ、ベルト初張力２０ｋｇｆとし、負荷４Ｐ
Ｓの下に雰囲気温度１００°Ｃでベルトを走行させ、走
行開始時から背ゴム又は歯形ゴム（歯元）にクラックが
発生するまでの時間にて評価した。In addition, in the load durability test, a 10 s wide belt was wound between the driving pulley and the driven pulley, and the driving pulley rotation speed was 6.
00Orpm, initial belt tension 20kgf, load 4P
The belt was run under S at an ambient temperature of 100°C, and the time from the start of running until the occurrence of cracks in the back rubber or tooth-shaped rubber (tooth root) was evaluated.
比較例１〜４は、水素化二ｌ−ＩＪルゴム組成物に液状
１，２−ポリブタジエンを共架橋剤として含有させるこ
となしに、パーオキサイド系架橋剤の配合量を糧々に変
えて製造した歯付きベルトの性能を示し、耐熱走行寿命
には比較的すぐれるものもあるが、負荷耐久寿命が著し
く劣る。Comparative Examples 1 to 4 were produced by varying the amount of the peroxide crosslinking agent without containing liquid 1,2-polybutadiene as a co-crosslinking agent in the hydrogenated dil-IJ rubber composition. They exhibit the performance of toothed belts, and some have relatively good heat-resistant running life, but their load-bearing life is significantly inferior.
これに対して、本発明による歯付きベルトは、耐熱走行
寿命及び負荷耐久寿命共にすぐれる。In contrast, the toothed belt according to the present invention has excellent heat-resistant running life and load-bearing life.
比較例５は、水素化ニトリルゴム組成物に液状１．２−
ポリブタジエンを過多に配合させた場合であって、得ら
れる歯付きベルトは、耐熱性が劣る。Comparative Example 5 is a hydrogenated nitrile rubber composition containing liquid 1.2-
This is a case where too much polybutadiene is blended, and the resulting toothed belt has poor heat resistance.
比較例６及び７は、末端がカルボキシル化されていない
液状１．２−ポリブタジエンを共架橋剤として用いて得
た歯付きベルトについての結果を示し、本発明による歯
付きベルトに比較して、負荷耐久寿命が劣る。Comparative Examples 6 and 7 show results for toothed belts obtained using non-terminally carboxylated liquid 1,2-polybutadiene as a co-crosslinking agent and show that compared to toothed belts according to the invention, the load Durability is inferior.
比較例８〜１１は、末端カルボキシル化液状１゜２−ポ
リブタジエン以外の共架橋剤を用いた結果であり、耐熱
走行寿命及び負荷耐久寿命いずれも不十分である。更に
、比較例８は、ムーニースコーチが著しく短く、成形上
、所謂焼けを起こしやすく、ベルトの製造には不適当で
ある。Comparative Examples 8 to 11 are the results of using a co-crosslinking agent other than terminally carboxylated liquid 1°2-polybutadiene, and both the heat-resistant running life and the load-bearing life are insufficient. Furthermore, Comparative Example 8 has a significantly short Mooney scorch and is susceptible to so-called burning during molding, making it unsuitable for manufacturing belts.
比較例１２及び１３はイオウ架橋によって得た歯付きベ
ルトを、また、比較例１４はクロロプレンゴムを用いて
得た歯付きベルトをそれぞれ示すが、いずれも性能が劣
ることが明らかである。Comparative Examples 12 and 13 show toothed belts obtained by sulfur crosslinking, and Comparative Example 14 shows a toothed belt obtained using chloroprene rubber, but it is clear that both have inferior performance.
第１図は、歯付き伝動ベルトを示す断面を含む斜視図で
ある。
ｌ・・・背ゴム、２・・・歯形ゴム、３・・・芯線、４
・・・帆布。
特許出願人 バンド−化学株式会社
第１図FIG. 1 is a perspective view including a cross section showing a toothed power transmission belt. l... Back rubber, 2... tooth shaped rubber, 3... core wire, 4
...Canvas. Patent applicant Band-Kagaku Co., Ltd. Figure 1
Claims (1)
からなる歯付きベルトにおいて、背ゴム及び歯ゴムが水
素化ニトリルゴム１００ｇ当りにパーオキサイド０．０
０２〜０．０３モル及び共架橋剤としての分子量５００
〜５０００の末端カルボキシル化液状１，２−ポリブタ
ジエン１〜７ｇを含有するパーオキサイド架橋系水素化
ニトリルゴム組成物からなることを特徴とする耐熱性歯
付きベルト。(1) In a toothed belt consisting of a back rubber, a tooth rubber, and a bottom canvas bonded to the tooth rubber, the back rubber and the tooth rubber contain 0.0 peroxide per 100 g of hydrogenated nitrile rubber.
02-0.03 mol and molecular weight as co-crosslinking agent 500
A heat-resistant toothed belt comprising a peroxide-crosslinked hydrogenated nitrile rubber composition containing 1 to 7 g of terminally carboxylated liquid 1,2-polybutadiene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9773888A JPH01269743A (en) | 1988-04-20 | 1988-04-20 | heat resistant toothed belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9773888A JPH01269743A (en) | 1988-04-20 | 1988-04-20 | heat resistant toothed belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01269743A true JPH01269743A (en) | 1989-10-27 |
| JPH0565735B2 JPH0565735B2 (en) | 1993-09-20 |
Family
ID=14200238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9773888A Granted JPH01269743A (en) | 1988-04-20 | 1988-04-20 | heat resistant toothed belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01269743A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04175160A (en) * | 1990-11-09 | 1992-06-23 | Sumitomo Rubber Ind Ltd | Toothed belt |
| JPH04348146A (en) * | 1991-05-24 | 1992-12-03 | Mitsuboshi Belting Ltd | Rubber composition having good curing and bonding property to fiber material |
| US5209961A (en) * | 1990-06-13 | 1993-05-11 | Unitta Co., Ltd. | Toothed belt |
| US5322479A (en) * | 1991-12-26 | 1994-06-21 | Caoutchouc Manufacture Et Plastiques | Endless belt power transmission system |
| EP0674121A1 (en) * | 1994-03-16 | 1995-09-27 | Tsubakimoto Chain Co. | Toothed belt |
| US5484341A (en) * | 1994-02-04 | 1996-01-16 | Tsubakimoto Chain Co. | Toothed belt for power transmission and manufacturing method |
| US5630770A (en) * | 1994-04-21 | 1997-05-20 | Tsubakimoto Chain Co. | Toothed belt |
| US5741198A (en) * | 1994-11-22 | 1998-04-21 | Tsubakimoto Chain Co. | Toothed belt |
| EP0961050A3 (en) * | 1998-04-20 | 1999-12-29 | Mitsuboshi Belting Ltd. | Toothed power transmission belt |
-
1988
- 1988-04-20 JP JP9773888A patent/JPH01269743A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209961A (en) * | 1990-06-13 | 1993-05-11 | Unitta Co., Ltd. | Toothed belt |
| JPH04175160A (en) * | 1990-11-09 | 1992-06-23 | Sumitomo Rubber Ind Ltd | Toothed belt |
| JPH04348146A (en) * | 1991-05-24 | 1992-12-03 | Mitsuboshi Belting Ltd | Rubber composition having good curing and bonding property to fiber material |
| US5322479A (en) * | 1991-12-26 | 1994-06-21 | Caoutchouc Manufacture Et Plastiques | Endless belt power transmission system |
| US5484341A (en) * | 1994-02-04 | 1996-01-16 | Tsubakimoto Chain Co. | Toothed belt for power transmission and manufacturing method |
| EP0674121A1 (en) * | 1994-03-16 | 1995-09-27 | Tsubakimoto Chain Co. | Toothed belt |
| JPH07259927A (en) * | 1994-03-16 | 1995-10-13 | Tsubakimoto Chain Co | Toothed belt |
| US5599246A (en) * | 1994-03-16 | 1997-02-04 | Tsubakimoto Chain Co. | Toothed belt |
| US5630770A (en) * | 1994-04-21 | 1997-05-20 | Tsubakimoto Chain Co. | Toothed belt |
| US5741198A (en) * | 1994-11-22 | 1998-04-21 | Tsubakimoto Chain Co. | Toothed belt |
| EP0961050A3 (en) * | 1998-04-20 | 1999-12-29 | Mitsuboshi Belting Ltd. | Toothed power transmission belt |
| US6220983B1 (en) | 1998-04-20 | 2001-04-24 | Mitsuboshi Belting Ltd. | Toothed power transmission belt |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0565735B2 (en) | 1993-09-20 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |