JP2016028865A - Method for producing pneumatic tire and method for producing tire member - Google Patents
Method for producing pneumatic tire and method for producing tire member Download PDFInfo
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Abstract
Description
本発明は、空気入りタイヤの製造方法及びタイヤ部材の製造方法に関する。 The present invention relates to a method for manufacturing a pneumatic tire and a method for manufacturing a tire member.
近年、省エネルギーの観点から、低燃費タイヤの開発が盛んにおこなわれている。低燃費タイヤの開発には、加硫して得られたタイヤ部材の低発熱性能を向上させることが必要不可欠と言われている。 In recent years, fuel efficient tires have been actively developed from the viewpoint of energy saving. It is said that in order to develop a low fuel consumption tire, it is indispensable to improve the low heat generation performance of a tire member obtained by vulcanization.
低発熱性に優れた加硫ゴムを得る技術として、低温で未加硫ゴムを加硫する技術が知られている。 As a technique for obtaining a vulcanized rubber excellent in low heat buildup, a technique for vulcanizing an unvulcanized rubber at a low temperature is known.
また、タイヤ用ゴム組成物に関する技術として、イオン液体を配合する技術が知られている（例えば、特許文献１〜２参照）。 Moreover, the technique which mix | blends an ionic liquid is known as a technique regarding the rubber composition for tires (for example, refer patent documents 1-2).
低温で未加硫ゴムを加硫する技術は、一般的な加硫温度（１６０℃〜１９０℃）で加硫する場合に比べて、加硫に要する時間がかかるため、生産性が著しく悪い。 The technology for vulcanizing unvulcanized rubber at a low temperature takes significantly longer to vulcanize than the case of vulcanizing at a general vulcanization temperature (160 ° C. to 190 ° C.), and thus the productivity is extremely poor.
本発明は上記実情に鑑みてなされたものであり、その目的は、低発熱性に優れたタイヤ部材を備える空気入りタイヤを効率よく製造できる方法を提供することにある。本発明の目的はまた、低発熱性に優れたタイヤ部材を効率よく製造できる方法を提供することにある。 This invention is made | formed in view of the said situation, The objective is to provide the method which can manufacture a pneumatic tire provided with the tire member excellent in the low heat_generation | fever efficiently. Another object of the present invention is to provide a method capable of efficiently producing a tire member excellent in low heat build-up.
上記課題を解決するために、本発明は以下の構成を備える。即ち本発明は、イオン液体を含むゴム組成物を含む未加硫部材を備える生タイヤを１００〜１４０℃で加硫する工程を含む空気入りタイヤの製造方法、に関する。 In order to solve the above problems, the present invention comprises the following arrangement. That is, this invention relates to the manufacturing method of a pneumatic tire including the process of vulcanizing a raw tire provided with the unvulcanized member containing the rubber composition containing an ionic liquid at 100-140 degreeC.
本発明に係る製造方法では、ゴム組成物にイオン液体を配合するため、加硫速度を速めることが可能で、空気入りタイヤを効率よく製造できる。ゴム組成物にイオン液体を配合することによりかかる効果が得られる理由は明らかではないが、ゴム組成物中にわずかに存在する水分とイオン液体により加硫促進剤の分解が促進され、この結果として加硫速度が速くなると推測される。また、本発明に係る製造方法では、１００〜１４０℃で加硫するため、低発熱性に優れたタイヤ部材を備える空気入りタイヤを得ることができる。 In the production method according to the present invention, since the ionic liquid is blended with the rubber composition, the vulcanization speed can be increased and a pneumatic tire can be produced efficiently. The reason why such an effect can be obtained by adding an ionic liquid to the rubber composition is not clear, but the decomposition of the vulcanization accelerator is promoted by the water and the ionic liquid that are slightly present in the rubber composition. It is presumed that the vulcanization speed will increase. Moreover, in the manufacturing method which concerns on this invention, since it vulcanizes | cure at 100-140 degreeC, a pneumatic tire provided with the tire member excellent in the low heat generation property can be obtained.
未加硫部材の具体例としては、例えば、未加硫トレッド、未加硫サイドウォール、未加硫ビードフィラーなどが挙げられる。 Specific examples of the unvulcanized member include, for example, an unvulcanized tread, an unvulcanized sidewall, an unvulcanized bead filler, and the like.
ゴム組成物は、通常、ジエン系ゴムをさらに含む。ゴム組成物は、ジエン系ゴム１００質量部に対してイオン液体を１〜４０質量部含むことが好ましい。１質量部未満であると、加硫速度を速めることが困難なことがある。一方、４０質量部を越えると、加硫ゴムの硬度が低下する。 The rubber composition usually further contains a diene rubber. The rubber composition preferably contains 1 to 40 parts by mass of an ionic liquid with respect to 100 parts by mass of the diene rubber. If it is less than 1 part by mass, it may be difficult to increase the vulcanization rate. On the other hand, when it exceeds 40 parts by mass, the hardness of the vulcanized rubber is lowered.
イオン液体のカチオン構造が、アンモニウム塩、イミダゾリウム塩、ピリジウム塩、ピロリジニウム塩、ホスホニウム塩及びスルホニウム塩からなる群より選択される少なくとも１種であることが好ましい。イオン液体が、１−エチル−３−メチルイミダゾリウム メチルホスホネート又はＮ，Ｎ−ジエチル−Ｎ−メチル−Ｎ−（２−メトキシエチル）アンモニウムビス（トリフルオロメタンスルホニル）イミドであることも好ましい。 The cation structure of the ionic liquid is preferably at least one selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridium salt, a pyrrolidinium salt, a phosphonium salt, and a sulfonium salt. It is also preferred that the ionic liquid is 1-ethyl-3-methylimidazolium methylphosphonate or N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide.
本発明はまた、イオン液体を含むゴム組成物を含む未加硫部材を１００〜１４０℃で加硫する工程を含むタイヤ部材の製造方法、に関する。 The present invention also relates to a method for manufacturing a tire member including a step of vulcanizing an unvulcanized member containing a rubber composition containing an ionic liquid at 100 to 140 ° C.
本発明に係る製造方法では、ゴム組成物にイオン液体を配合するため、加硫速度を速めることが可能で、タイヤ部材を効率よく製造できる。また、本発明に係る製造方法では、未加硫部材を１００〜１４０℃で加硫するため、低発熱性に優れたタイヤ部材を得ることができる。 In the production method according to the present invention, since the ionic liquid is blended with the rubber composition, the vulcanization speed can be increased and the tire member can be produced efficiently. Moreover, in the manufacturing method which concerns on this invention, since an unvulcanized member is vulcanized at 100-140 degreeC, the tire member excellent in the low heat generation property can be obtained.
［実施形態１］
実施形態１に係る製造方法は、生タイヤ１０を１００〜１４０℃で加硫することにより空気入りタイヤ２０を得る工程を含む。
[Embodiment 1]
The manufacturing method according to Embodiment 1 includes a step of obtaining the
図１に示すように、生タイヤ１０は未加硫トレッド１０４を備える。生タイヤ１０は、例えば、一対のビードワイヤー１０１と、ビードワイヤー１０１のタイヤ径方向外側に配された未加硫ビードフィラー１０２と、ビードワイヤー１０１及び未加硫ビードフィラー１０２から各々タイヤ径方向外側に延びる未加硫サイドウォール１０３と、未加硫サイドウォール１０３の各々のタイヤ径方向外側端に連なる未加硫トレッド１０４と、一対のビードワイヤー１０１で端部側がタイヤ幅方向内側から外側に巻き上げられたカーカスプライ１０５と、カーカスプライ１０５の外周側（タイヤ径方向外側）に配された複数のベルトプライからなるベルト１０６と、を備える。
As shown in FIG. 1, the
未加硫トレッド１０４はゴム組成物からなる。
The
ゴム組成物はイオン液体を含む。本明細書において、イオン液体とは、カチオンとアニオンからなり、常温（２３〜２５℃）において液体状態であるものを意味する。 The rubber composition includes an ionic liquid. In the present specification, the ionic liquid means a liquid consisting of a cation and an anion and in a liquid state at normal temperature (23 to 25 ° C.).
イオン液体のカチオン構造としては、例えば、アンモニウム塩、イミダゾリウム塩、ピリジウム塩、ピロリジニウム塩、ホスホニウム塩、スルホニウム塩などが挙げられる。イオン液体の具体例としては、例えば、１−エチル−３−メチルイミダゾリウム メチルホスホネート、Ｎ，Ｎ−ジエチル−Ｎ−メチル−Ｎ−（２−メトキシエチル）アンモニウムビス（トリフルオロメタンスルホニル）イミドなどが挙げられる。 Examples of the cation structure of the ionic liquid include ammonium salt, imidazolium salt, pyridium salt, pyrrolidinium salt, phosphonium salt, sulfonium salt and the like. Specific examples of the ionic liquid include, for example, 1-ethyl-3-methylimidazolium methylphosphonate, N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide, and the like. Can be mentioned.
イオン液体は親水性のものであってもよく、疎水性のものでもよい。加硫速度を速める効果が高いという観点では、親水性が好ましい。 The ionic liquid may be hydrophilic or hydrophobic. From the viewpoint that the effect of increasing the vulcanization speed is high, hydrophilicity is preferable.
イオン液体の含有量は、ジエン系ゴム１００質量部に対し、１質量部以上、好ましくは２質量部以上、より好ましくは３質量部以上である。１質量部未満であると、加硫速度を速めることが困難なことがある。一方、イオン液体の含有量は、ジエン系ゴム１００質量部に対し、４０質量部以下、好ましくは３５質量部以下である。４０質量部を越えると、加硫ゴムの硬度が低下する。 The content of the ionic liquid is 1 part by mass or more, preferably 2 parts by mass or more, more preferably 3 parts by mass or more with respect to 100 parts by mass of the diene rubber. If it is less than 1 part by mass, it may be difficult to increase the vulcanization rate. On the other hand, the content of the ionic liquid is 40 parts by mass or less, preferably 35 parts by mass or less with respect to 100 parts by mass of the diene rubber. If it exceeds 40 parts by mass, the hardness of the vulcanized rubber will decrease.
ゴム組成物は、通常、ジエン系ゴムを含む。 The rubber composition usually contains a diene rubber.
ジエン系ゴムとしては、天然ゴム（ＮＲ）、ポリイソプレンゴム（ＩＲ）、ポリスチレンブタジエンゴム（ＳＢＲ）、ポリブタジエンゴム（ＢＲ）、クロロプレンゴム（ＣＲ）、ニトリルゴム（ＮＢＲ）などが挙げられる。必要に応じて、末端を変性したもの（例えば、末端変性ＢＲ、末端変性ＳＢＲなど）、あるいは所望の特性を付与すべく改質したもの（例えば、改質ＮＲ）も好適に使用可能である。また、ポリブタジエンゴム（ＢＲ）については、コバルト（Ｃｏ）触媒、ネオジム（Ｎｄ）触媒、ニッケル（Ｎｉ）触媒、チタン（Ｔｉ）触媒、リチウム（Ｌｉ）触媒を用いて合成したものに加えて、ＷＯ２００７−１２９６７０に記載のメタロセン錯体を含む重合触媒組成物を用いて合成したもの、あるいはシンジオタクティック結晶を含むポリブタジエンゴムも使用可能である。なかでも、天然ゴム、ポリスチレンブタジエンゴムが好ましい。 Examples of the diene rubber include natural rubber (NR), polyisoprene rubber (IR), polystyrene butadiene rubber (SBR), polybutadiene rubber (BR), chloroprene rubber (CR), and nitrile rubber (NBR). If necessary, a terminal-modified one (for example, terminal-modified BR, terminal-modified SBR, etc.) or a substance modified to give a desired property (for example, a modified NR) can be suitably used. Regarding polybutadiene rubber (BR), in addition to those synthesized using a cobalt (Co) catalyst, a neodymium (Nd) catalyst, a nickel (Ni) catalyst, a titanium (Ti) catalyst, and a lithium (Li) catalyst, WO2007 A polybutadiene rubber synthesized using a polymerization catalyst composition containing a metallocene complex described in 129670 or a syndiotactic crystal can also be used. Of these, natural rubber and polystyrene butadiene rubber are preferable.
ジエン系ゴムを１００質量部としたとき、天然ゴムの含有量は５０質量部以上が好ましく、６０質量部以上がより好ましい。 When the diene rubber is 100 parts by mass, the content of natural rubber is preferably 50 parts by mass or more, and more preferably 60 parts by mass or more.
ゴム組成物は、カーボンブラック、オイル、亜鉛華、ステアリン酸、加硫系配合剤、老化防止剤、シリカ、シランカップリング剤などを適宜配合できる。 In the rubber composition, carbon black, oil, zinc white, stearic acid, vulcanizing compounding agent, anti-aging agent, silica, silane coupling agent, and the like can be appropriately compounded.
カーボンブラックは、例えばＳＡＦ、ＩＳＡＦ、ＨＡＦ、ＦＥＦ、ＧＰＦなど、通常のゴム工業で使用されるカーボンブラックの他、アセチレンブラックやケッチェンブラックなどの導電性カーボンブラックを使用することができる。 As the carbon black, for example, conductive carbon black such as acetylene black and ketjen black can be used in addition to carbon black used in normal rubber industry such as SAF, ISAF, HAF, FEF, and GPF.
カーボンブラックの含有量は、ジエン系ゴム１００質量部に対し、好ましくは２０質量部以上、より好ましくは５０質量部以上である。一方、カーボンブラックの含有量は、ジエン系ゴム１００質量部に対し、好ましくは１２０質量部以下、より好ましくは１００質量部以下である。 The content of carbon black is preferably 20 parts by mass or more, more preferably 50 parts by mass or more with respect to 100 parts by mass of the diene rubber. On the other hand, the content of carbon black is preferably 120 parts by mass or less, more preferably 100 parts by mass or less, with respect to 100 parts by mass of the diene rubber.
オイルとしては、例えば、パラフィン系プロセスオイル、ナフテン系プロセスオイル、芳香族系プロセスオイルなどを好適に使用できる。 As the oil, for example, paraffinic process oil, naphthenic process oil, aromatic process oil and the like can be suitably used.
オイルの含有量は、ジエン系ゴム１００質量部に対し、好ましくは３０質量部以下、より好ましくは２０質量部以下である。 The oil content is preferably 30 parts by mass or less, more preferably 20 parts by mass or less, with respect to 100 parts by mass of the diene rubber.
加硫系配合剤としては、硫黄、有機過酸化物などの加硫剤、加硫促進剤、加硫促進助剤、加硫遅延剤などが挙げられる。 Examples of the vulcanizing compounding agent include vulcanizing agents such as sulfur and organic peroxides, vulcanization accelerators, vulcanization acceleration aids, vulcanization retarders and the like.
加硫系配合剤としての硫黄は通常のゴム用硫黄であればよく、例えば粉末硫黄、沈降硫黄、不溶性硫黄、高分散性硫黄などを用いることができる。加硫後のゴム物性や耐久性などを考慮した場合、ジエン系ゴム１００質量部に対する硫黄の配合量は、硫黄分換算で０．５〜５．０質量部が好ましい。 Sulfur as the vulcanizing compounding agent may be normal sulfur for rubber. For example, powdered sulfur, precipitated sulfur, insoluble sulfur, highly dispersible sulfur and the like can be used. When the rubber physical properties and durability after vulcanization are taken into consideration, the sulfur content relative to 100 parts by mass of the diene rubber is preferably 0.5 to 5.0 parts by mass in terms of sulfur content.
加硫促進剤としては、ゴム加硫用として通常用いられる、スルフェンアミド系加硫促進剤、チウラム系加硫促進剤、チアゾール系加硫促進剤、チオウレア系加硫促進剤、グアニジン系加硫促進剤、ジチオカルバミン酸塩系加硫促進剤などが挙げられる。ジエン系ゴム１００質量部に対する加硫促進剤の配合量は、０．１〜５．０質量部が好ましい。 As the vulcanization accelerator, sulfenamide vulcanization accelerator, thiuram vulcanization accelerator, thiazole vulcanization accelerator, thiourea vulcanization accelerator, guanidine vulcanization, which are usually used for rubber vulcanization. Examples thereof include accelerators and dithiocarbamate vulcanization accelerators. The blending amount of the vulcanization accelerator with respect to 100 parts by mass of the diene rubber is preferably 0.1 to 5.0 parts by mass.
老化防止剤としては、ゴム用として通常用いられる、芳香族アミン系老化防止剤、アミン−ケトン系老化防止剤、モノフェノール系老化防止剤、ビスフェノール系老化防止剤、ポリフェノール系老化防止剤、ジチオカルバミン酸塩系老化防止剤、チオウレア系老化防止剤などの老化防止剤を単独、または適宜混合して使用しても良い。老化防止剤の含有量は、ジエン系ゴム１００質量部に対して０〜５．０質量部であることがより好ましく、０．５〜３．０質量部であることがさらに好ましい。 As an anti-aging agent, an aromatic amine-based anti-aging agent, an amine-ketone anti-aging agent, a monophenol anti-aging agent, a bisphenol anti-aging agent, a polyphenol anti-aging agent, dithiocarbamic acid, which are usually used for rubber Anti-aging agents such as a salt-based anti-aging agent and a thiourea-based anti-aging agent may be used alone or in an appropriate mixture. The content of the anti-aging agent is more preferably 0 to 5.0 parts by mass and further preferably 0.5 to 3.0 parts by mass with respect to 100 parts by mass of the diene rubber.
ゴム組成物は、例えば、ジエン系ゴム、イオン液体に加えて、必要に応じて、カーボンブラック、オイル、亜鉛華、ステアリン酸、加硫系配合剤、老化防止剤、シリカ、シランカップリング剤などを、バンバリーミキサー、ニーダー、ロールなどの通常のゴム工業において使用される混練機を用いて混練りすることにより得られる。 The rubber composition is, for example, carbon black, oil, zinc white, stearic acid, vulcanizing compound, anti-aging agent, silica, silane coupling agent, etc. Can be obtained by kneading using a kneader used in a normal rubber industry such as a Banbury mixer, a kneader, or a roll.
また、各成分の配合方法は特に限定されず、加硫系配合剤以外の配合成分を予め混練してマスターバッチとし、残りの成分を添加してさらに混練する方法、各成分を任意の順序で添加し混練する方法、全成分を同時に添加して混練する方法などのいずれでもよい。 In addition, the blending method of each component is not particularly limited, and a blending component other than the vulcanizing compounding agent is kneaded in advance to form a master batch, the remaining components are added and further kneaded, and the components are in any order. Any of a method of adding and kneading, a method of adding all components simultaneously and kneading may be used.
実施形態１に係る製造方法では、生タイヤ１０を１００〜１４０℃で加硫することにより空気入りタイヤ２０を得る。加硫温度が１００℃未満であると、タイヤ部材の硬度が低下し、低発熱性も悪化する。また、空気入りタイヤを効率よく製造できない。加硫温度が１４０℃を越えると、低発熱性が悪化する。
In the manufacturing method according to Embodiment 1, the
タイヤ部材の低発熱性と空気入りタイヤの生産性のバランスがよいという理由から、生タイヤ１０を１１０℃以上で加硫することが好ましく、１２０℃以上で加硫することがより好ましい。生タイヤ１０を１３５℃以下で加硫することが好ましい。
The
図２に示すように、空気入りタイヤ２０は、未加硫トレッド１０４を加硫して得られたトレッド２０４を備える。空気入りタイヤ２０は、例えば、一対のビードワイヤー１０１と、ビードワイヤー１０１のタイヤ径方向外側に配されたビードフィラー２０２と、ビードワイヤー１０１及びビードフィラー２０２から各々タイヤ径方向外側に延びるサイドウォール２０３と、サイドウォール２０３の各々のタイヤ径方向外側端に連なるトレッド２０４と、一対のビードワイヤー１０１で端部側がタイヤ幅方向内側から外側に巻き上げられたカーカスプライ１０５と、カーカスプライ１０５の外周側（タイヤ径方向外側）に配された複数のベルトプライからなるベルト１０６と、を備える。
As shown in FIG. 2, the
（変形例）
変形例１では、未加硫ビードフィラー１０２がイオン液体を含むゴム組成物からなる。変形例２では、未加硫サイドウォール１０３がイオン液体を含むゴム組成物からなる。
(Modification)
In Modification 1, the
［実施形態２］
実施形態２に係る製造方法は、未加硫トレッドを１００〜１４０℃で加硫することによりトレッドを得る工程を含む。未加硫トレッドはゴム組成物からなる。ゴム組成物はイオン液体を含む。好適なゴム組成物は、実施形態１の未加硫トレッド１０４と同様である。好適な加硫温度は、実施形態１と同様である。実施形態２に係る製造方法により得られたトレッドは、例えば、更生タイヤのプレキュアトレッドとして好適に使用できる。
[Embodiment 2]
The manufacturing method according to Embodiment 2 includes a step of obtaining a tread by vulcanizing an unvulcanized tread at 100 to 140 ° C. Unvulcanized tread consists of a rubber composition. The rubber composition includes an ionic liquid. A suitable rubber composition is the same as that of the
以下、本発明の構成と効果を具体的に示す実施例などについて説明する。 Hereinafter, examples and the like specifically showing the configuration and effects of the present invention will be described.
表１において、各配合剤の配合量を、ゴム成分１００質量部に対する質量部数で示す。 In Table 1, the compounding quantity of each compounding agent is shown by the mass part number with respect to 100 mass parts of rubber components.
［ゴム組成物の調製］
表１の配合処方に従い、各配合剤を配合し、通常のバンバリーミキサーを用いて混練し、ゴム組成物を調製した。表１に記載の配合剤を以下に示す。
ａ）天然ゴム 「ＲＳＳ＃３」
ｂ）ブタジエンゴム 「ＢＲ１５０Ｂ」、宇部興産社製
ｃ）カーボンブラック 「シースト６」、東海カーボン社製
ｄ）亜鉛華 「亜鉛華１号」、三井金属工業社製
ｅ）ステアリン酸 「ステアリン酸」、日本油脂社製
ｆ）老化防止剤 「アンチゲン６Ｃ」、住友化学社製
ｇ）硫黄 「粉末硫黄」、鶴見化学社製
ｈ）加硫促進剤 「サンセラーＣＭ−Ｇ」（Ｎ−シクロヘキシル−２−ベンゾチアジル−スルフェンアミド）、三新化学工業社製
ｉ）イオン液体
イオン液体１ 「１−エチル−３−メチルイミダゾリウム メチルホスホネート」（親水性）、関東化学社製
イオン液体２ 「Ｎ，Ｎ−ジエチル−Ｎ−メチル−Ｎ−（２−メトキシエチル）アンモニウムビス（トリフルオロメタンスルホニル）イミド」（疎水性）、関東化学社製
[Preparation of rubber composition]
According to the formulation of Table 1, each compounding agent was compounded and kneaded using a normal Banbury mixer to prepare a rubber composition. The compounding agents described in Table 1 are shown below.
a) Natural rubber “RSS # 3”
b) Butadiene rubber “BR150B”, Ube Industries Co., Ltd. c) Carbon black “Seast 6”, Tokai Carbon Co., Ltd. d) Zinc Hana “Zinc Hua 1”, Mitsui Kinzoku Kogyo Co., Ltd.) Stearic acid “Stearic acid”, F) Anti-aging agent “Antigen 6C”, manufactured by Sumitomo Chemical Co., Ltd. g) Sulfur “Powder sulfur”, Tsurumi Chemical Co., Ltd. h) Vulcanization accelerator “Sunseller CM-G” (N-cyclohexyl-2-benzothiazyl) -Sulfenamide), Sanshin Chemical Co., Ltd. i) Ionic liquid Ionic liquid 1 “1-ethyl-3-methylimidazolium methylphosphonate” (hydrophilic), Kanto Chemical Co., Ltd. Ionic liquid 2 “N, N-diethyl” -N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide "(hydrophobic), manufactured by Kanto Chemical Co., Inc.
［評価］
ゴム組成物を表１に示す温度にてＴ９０の時間で加硫して加硫ゴムを得た。ゴム組成物、加硫ゴムについて、下記の評価条件に基づいて評価を行った。結果を表１に示す。
[Evaluation]
The rubber composition was vulcanized at the temperature shown in Table 1 for a time of T90 to obtain a vulcanized rubber. The rubber composition and vulcanized rubber were evaluated based on the following evaluation conditions. The results are shown in Table 1.
（１）加硫速度
ゴム組成物について、ＪＩＳ Ｋ６３００−２に準拠し、試験振動数毎分１００±６回、振幅角±１°、表１に示す加硫温度にて、加硫速度（Ｔ９０）を測定した。加硫速度の評価結果は、比較例１を１００とした指数で示した。数値が小さいほど加硫速度が速く、生産性が良好であることを意味する。
(1) Vulcanization rate The rubber composition was vulcanized at a test frequency of 100 ± 6 times per minute, amplitude angle ± 1 °, vulcanization temperature shown in Table 1 according to JIS K6300-2 (T90). ) Was measured. The evaluation results of the vulcanization rate are shown as an index with Comparative Example 1 as 100. The smaller the value, the faster the vulcanization speed and the better the productivity.
（２）硬度
ＪＩＳ Ｋ６２５３−１に準拠し、スプリング式硬さ試験機 タイプＡデュロメータと恒温槽を使用し、加硫ゴムの硬度（Ｈｓ）を求めた。
(2) Hardness Based on JIS K6253-1, the hardness (Hs) of the vulcanized rubber was determined using a spring type hardness tester type A durometer and a thermostatic bath.
（３）Ｈｓ許容範囲判定
比較例１の硬度と比べて硬度が±３ポイント未満の加硫ゴムを許容範囲内と判定し、表１に○で示した。比較例１の硬度と比べて硬度が±３ポイント以上の加硫ゴムを許容範囲外と判定し、表１に×で示した。
(3) Determination of Hs allowable range A vulcanized rubber having a hardness of less than ± 3 points compared to the hardness of Comparative Example 1 was determined to be within the allowable range, and indicated by ○ in Table 1. Vulcanized rubber having a hardness of ± 3 points or more compared to the hardness of Comparative Example 1 was determined to be out of the allowable range, and is indicated by x in Table 1.
（４）発熱性
東洋精機製スペクトロメーターを用いて、温度６０℃、周波数５０Ｈｚ、初期歪み１０％、動的歪み２％でｔａｎδを測定した。ｔａｎδの評価結果は、比較例１を１００とした指数で示した。数値が小さいほど低発熱性であることを意味する。
(4) Exothermicity Using a Toyo Seiki spectrometer, tan δ was measured at a temperature of 60 ° C., a frequency of 50 Hz, an initial strain of 10%, and a dynamic strain of 2%. The evaluation result of tan δ was shown as an index with Comparative Example 1 as 100. The smaller the value, the lower the heat generation.
表１から実施例１〜４のゴム組成物の加硫速度が、イオン液体を含まない点以外は実施例１〜４と同様の比較例１のゴム組成物の加硫速度に比べて速いことがわかる。また、実施例１〜４の加硫ゴムの低発熱性が、比較例１の加硫ゴムの低発熱性に比べて優れることがわかる。 From Table 1, the vulcanization rate of the rubber compositions of Examples 1 to 4 is faster than the vulcanization rate of the rubber composition of Comparative Example 1 similar to Examples 1 to 4 except that the ionic liquid is not included. I understand. It can also be seen that the low exothermic properties of the vulcanized rubbers of Examples 1 to 4 are superior to the low exothermic property of the vulcanized rubber of Comparative Example 1.
また、加硫温度を１４０℃に変更した点以外は実施例１と同様の実施例５の加硫速度、低発熱性も良好であることがわかる。 Moreover, it turns out that the vulcanization | cure speed | velocity of Example 5 similar to Example 1 and the low exothermic property are also favorable except the point which changed the vulcanization temperature to 140 degreeC.
一方、加硫温度を９０℃に変更した点以外は実施例１と同様の比較例２の加硫ゴムの硬度が、実施例１に比べて低いことがわかる。また、比較例２の加硫ゴムの低発熱性が、実施例１に比べて劣ることがわかる。 On the other hand, it can be seen that the hardness of the vulcanized rubber of Comparative Example 2 similar to Example 1 is lower than that of Example 1 except that the vulcanization temperature was changed to 90 ° C. Further, it can be seen that the low exothermic property of the vulcanized rubber of Comparative Example 2 is inferior to that of Example 1.
加硫温度を一般的な１６０℃に変更した点以外は実施例１と同様の比較例３の加硫ゴムの低発熱性が、実施例１に比べて劣ることがわかる。
It can be seen that the low heat build-up of the vulcanized rubber of Comparative Example 3 similar to Example 1 is inferior to that of Example 1 except that the vulcanization temperature is changed to the general 160 ° C.
Claims (7)
前記ゴム組成物が前記ジエン系ゴム１００質量部に対して前記イオン液体を１〜４０質量部含む請求項１に記載の空気入りタイヤの製造方法。 The rubber composition further includes a diene rubber,
The method for producing a pneumatic tire according to claim 1, wherein the rubber composition contains 1 to 40 parts by mass of the ionic liquid with respect to 100 parts by mass of the diene rubber.
A tire member obtained by the manufacturing method according to claim 6.
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| CN109535452A (en) * | 2018-10-11 | 2019-03-29 | 华南理工大学 | A kind of sulfur vulcanized rubber and preparation method thereof of repeatable processing |
| JP2021501244A (en) * | 2017-10-31 | 2021-01-14 | 株式会社ブリヂストン | Rubber vulcanization process using eutectic mixture |
| CN113840877A (en) * | 2019-04-29 | 2021-12-24 | 株式会社普利司通 | Sidewall support for a pneumatic tire |
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| JP2021501244A (en) * | 2017-10-31 | 2021-01-14 | 株式会社ブリヂストン | Rubber vulcanization process using eutectic mixture |
| JP7011710B2 (en) | 2017-10-31 | 2022-01-27 | 株式会社ブリヂストン | Rubber vulcanization process using eutectic mixture |
| JP2022027843A (en) * | 2017-10-31 | 2022-02-14 | 株式会社ブリヂストン | Rubber vulcanization processes employing eutectic mixture |
| US11667774B2 (en) | 2017-10-31 | 2023-06-06 | Bridgestone Corporation | Rubber vulcanization processes employing an eutectic mixture |
| CN109535452A (en) * | 2018-10-11 | 2019-03-29 | 华南理工大学 | A kind of sulfur vulcanized rubber and preparation method thereof of repeatable processing |
| CN109535452B (en) * | 2018-10-11 | 2021-09-28 | 华南理工大学 | Sulfur vulcanized rubber capable of being repeatedly processed and preparation method thereof |
| CN113840877A (en) * | 2019-04-29 | 2021-12-24 | 株式会社普利司通 | Sidewall support for a pneumatic tire |
| JP2022531133A (en) * | 2019-04-29 | 2022-07-06 | 株式会社ブリヂストン | Side wall support for pneumatic tires |
| US11926179B2 (en) | 2019-04-29 | 2024-03-12 | Bridgestone Corporation | Sidewall supports for pneumatic tires |
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