JP2018053218A - タイヤ用ゴム組成物の製造方法およびタイヤ製造方法 - Google Patents
タイヤ用ゴム組成物の製造方法およびタイヤ製造方法 Download PDFInfo
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- JTTSZDBCLAKKAY-UHFFFAOYSA-N trimethoxy-[3-(3-trimethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCSSSSCCC[Si](OC)(OC)OC JTTSZDBCLAKKAY-UHFFFAOYSA-N 0.000 description 1
- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 125000006839 xylylene group Chemical group 0.000 description 1
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/372—Sulfides, e.g. R-(S)x-R'
- C08K5/3725—Sulfides, e.g. R-(S)x-R' containing nitrogen
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- C08K5/00—Use of organic ingredients
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- C08K5/00—Use of organic ingredients
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- C08K5/548—Silicon-containing compounds containing sulfur
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- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
- C08L81/04—Polysulfides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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Abstract
【解決手段】ゴム成分とメルカプト基を有するシランカップリング剤とを混練りする前に、ゴム成分と所定のポリスルフィド化合物との混練を開始することを特徴とするタイヤ用ゴム組成物の製造方法、この製造方法を含むタイヤの製造方法、およびゴム成分、メルカプト基を有するシランカップリング剤ならびに所定のポリスルフィド化合物を含有するタイヤ用ゴム組成物であって、ポリスルフィド化合物が混練りされたゴム成分にメルカプト基を有するシランカップリング剤が混練りされてなるタイヤ用ゴム組成物。
【選択図】なし
Description
[1]ゴム成分とメルカプト基を有するシランカップリング剤とを混練りする前に、ゴム成分と下記式(1)および/または(2)で表されるポリスルフィド化合物との混練を開始することを特徴とするタイヤ用ゴム組成物の製造方法、
[2]前記ゴム成分中、スチレン含有量が25〜50質量%、好ましくは28〜47質量%、より好ましくは31〜44質量%でありビニル結合量が10〜35モル%、好ましくは12〜33モル%、より好ましくは14〜31モル%であるジエン系ゴムを50質量%以上、好ましくは60質量%、より好ましくは70質量%含む上記[1]記載の製造方法、
[3]前記スチレン含有量が前記ビニル結合量の2倍以上、好ましくは2.2倍以上である上記[2]記載の製造方法、
[4]メルカプト基を有するシランカップリング剤が、下記式(3)で表される化合物、および/または下記式(4)で表される結合単位Aと下記式(5)で表される結合単位Bとを含む化合物である上記[1]〜[3]のいずれかに記載の製造方法、
[5]上記[1]〜[4]のいずれかに記載の製造方法で得られたタイヤ用ゴム組成物からタイヤ用部材を成形し、他のタイヤ用部材と組み合わせて生タイヤを成形する工程と、前記成形工程で得られた生タイヤを加硫する加硫工程とを含むタイヤの製造方法、
[6]ゴム成分、メルカプト基を有するシランカップリング剤ならびに下記式(1)および/または(2)で表されるポリスルフィド化合物を含有するタイヤ用ゴム組成物であって、ポリスルフィド化合物が混練りされたゴム成分にメルカプト基を有するシランカップリング剤が混練りされてなるタイヤ用ゴム組成物
に関する。
SBR:トリンセオ社製のSLR6430(S−SBR、スチレン含有量:40質量%、ビニル結合量:18モル%、ゴム成分100質量部に対しオイル分37.5質量部を含む油展品)
BR:宇部興産(株)製のBR150B(シス1,4−含有率97%)
ポリスルフィド化合物:ラインケミー社製のレノグランCLD80(カプロラクタムジスルフィド)
微粒子カーボンブラック:三菱化学(株)製のダイアブラック(登録商標)XR(N2SA:180m2/g)
シリカ:エボニック・デグザ(Evonik Degussa)社製のULTRASIL(登録商標)VN3(N2SA:175m2/g)
シランカップリング剤A:Momentive社製のNXT−Z45(結合単位Aと結合単位Bとの共重合体(結合単位A:55モル%、結合単位B:45モル%))
シランカップリング剤B:EVONIK−DEGUSSA社製のSi363
酸化亜鉛:三井金属鉱業(株)製の亜鉛華1号
ステアリン酸:日油(株)製のステアリン酸「椿」
ワックス:日本精蝋(株)製のオゾエース0355(パラフィン系)
オイル:H&R(株)製のVivaTec400(TDAEオイル)
スチレン樹脂:アリゾナケミカル社製のSylvatraxx(登録商標)4401(軟化点:85℃)
老化防止剤(1):住友化学(株)製のアンチゲン6C(N−(1,3−ジメチルブチル)−N’−フェニル−p−フェニレンジアミン)
老化防止剤(2):大内新興化学工業(株)製のノクラック224(TMQ、2,2,4−トリメチル−1,2−ジヒドロキノリン重合体)
加工助剤(1):パフォーマンスアディティブス社製のUltra−Flow(登録商標)440(天然脂肪酸亜鉛/金属石鹸)
加工助剤(2):Schill&Seilacher社製のストラクトールWB16(脂肪酸エステルと脂肪酸金属塩の混合物)
硫黄:細井化学(株)製のHK−200−5(5%オイル含有粉末硫黄)
加硫促進剤(1):三新化学工業(株)製のサンセラーNS−G(N−(tert−ブチル)−2−ベンゾチアゾールスルフェンアミド(TBBS))
加硫促進剤(2):三新化学工業(株)製のサンセラーTBZTD(テトラベンジルチウラムジスルフィド(TBzTD))
加硫促進剤(3):大内新興化学工業(株)製のノクセラーD(N,N’−ジフェニルグアニジン)
表1に示す配合内容に従い、工程X1に示す各種薬品を、1.7Lバンバリーミキサーにて20秒間混練りした。その後、表1の工程X2に示す各種薬品を加えて、80秒間混練りし、表1の工程X3に示す各種薬品を加えてさらに80秒間混練りし、排出温度160℃で混練物を排出した。得られた混練物は、約30℃に冷却してから次工程に用いた。
表2の配合内容に従い、工程Xにおける薬品の添加を段階的に行わなかった以外は実施例1と同様にして未加硫ゴム組成物、加硫ゴム組成物、およびタイヤを製造した。
8インチのオープンロールに1kgの未加硫ゴム組成物を幅30cm、厚み2mmで巻きつけ、ゴム温度が95±5℃になるまで練り、ゴムシートを得た。その後、得られたゴムシートをカットし、ゴムの生地肌の表面粗さRaをJIS B0601の算術平均粗さRaに準拠して、表面粗さ計により測定した。得られた結果を、次のように、実施例1〜6および8ならびに比較例2〜4および7〜9については比較例1を基準比較例とし、実施例7および9ならびに比較例6、10および11については比較例5を基準比較例として指数表示した。
Claims (6)
- 前記ゴム成分中、スチレン含有量が25〜50質量%でありビニル結合量が10〜35モル%であるジエン系ゴムを50質量%以上含む請求項1記載の製造方法。
- 前記スチレン含有量が前記ビニル結合量の2倍以上である請求項2記載の製造方法。
- メルカプト基を有するシランカップリング剤が、下記式(3)で表される化合物、および/または下記式(4)で表される結合単位Aと下記式(5)で表される結合単位Bとを含む化合物である請求項1〜3のいずれか1項に記載の製造方法。
- 請求項1〜4のいずれか1項に記載の製造方法で得られたタイヤ用ゴム組成物からタイヤ用部材を成形し、他のタイヤ用部材と組み合わせて生タイヤを成形する工程と、前記成形工程で得られた生タイヤを加硫する加硫工程とを含むタイヤの製造方法。
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