JP2016044262A - ゴム組成物及び空気入りタイヤ - Google Patents
ゴム組成物及び空気入りタイヤ Download PDFInfo
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- JP2016044262A JP2016044262A JP2014170543A JP2014170543A JP2016044262A JP 2016044262 A JP2016044262 A JP 2016044262A JP 2014170543 A JP2014170543 A JP 2014170543A JP 2014170543 A JP2014170543 A JP 2014170543A JP 2016044262 A JP2016044262 A JP 2016044262A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011593 sulfur Substances 0.000 claims abstract description 21
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 21
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- 239000000377 silicon dioxide Substances 0.000 claims description 18
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 16
- 239000006229 carbon black Substances 0.000 claims description 15
- 150000004292 cyclic ethers Chemical group 0.000 claims description 14
- 150000002430 hydrocarbons Chemical group 0.000 claims description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
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- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- FBBATURSCRIBHN-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyldisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSCCC[Si](OCC)(OCC)OCC FBBATURSCRIBHN-UHFFFAOYSA-N 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
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Classifications
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
-
- 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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- 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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- 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
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
【解決手段】ゴム成分と、硫黄と、特定の化合物とを含有し、前記ゴム成分100質量%中のジエン系ゴムの含有量が60〜100質量%であり、前記ゴム成分100質量部に対して、特定の化合物の含有量が0.1〜30質量部であるゴム組成物に関する。
【選択図】なし
Description
上記ゴム成分100質量%中のジエン系ゴムの含有量が60〜100質量%であり、
上記ゴム成分100質量部に対して、下記式(1)で表される化合物の含有量が0.1〜30質量部であるゴム組成物に関する。
上記ゴム組成物は、靴底ゴムに用いられる靴底ゴム用ゴム組成物であることが好ましい。
上記ゴム組成物は、産業用ベルトに用いられる産業用ベルト用ゴム組成物であることが好ましい。
上記ゴム組成物は、タイヤのトレッドに用いられるタイヤのトレッド用ゴム組成物であることが好ましい。
ゴム成分としては、例えば、天然ゴム(NR)、イソプレンゴム(IR)、ブタジエンゴム(BR)、スチレンブタジエンゴム(SBR)、スチレンイソプレンブタジエンゴム(SIBR)、エチレンプロピレンジエンゴム(EPDM)、クロロプレンゴム(CR)、アクリロニトリルブタジエンゴム(NBR)、ブチルゴム(IIR)等のジエン系ゴムが挙げられる。ゴム成分は、単独で用いてもよく、2種以上を併用してもよい。なかでも、グリップ性能及び耐摩耗性がよりバランスよく得られるという理由から、NR、BR及びSBRからなる群より選択される少なくとも1種が好ましく、BR及び/又はSBRがより好ましく、SBRが更に好ましい。
硫黄としては、ゴム工業において一般的に用いられる粉末硫黄、沈降硫黄、コロイド硫黄、不溶性硫黄、高分散性硫黄、可溶性硫黄などが挙げられる。
なお、本発明において、アクリル系樹脂及びテルペン系樹脂のガラス転移点は、JIS K 7121に従い、昇温速度10℃/分の条件で示差走査熱量測定(DSC)を行って測定される値である。
なお、本発明において、アルキルフェノール系樹脂のガラス転移点は、JIS K 7121に従い、昇温速度10℃/分の条件で示差走査熱量測定(DSC)を行って測定される値である。
なお、本発明において、アクリル系樹脂、アルキルフェノール系樹脂、テルペン系樹脂のOH価とは、樹脂1gをアセチル化するとき、水酸基と結合した酢酸を中和するのに要する水酸化カリウムの量をミリグラム数で表したものであり、電位差滴定法(JIS K 0070:1992)により測定した値である。なお、カルボキシル基含有アクリル樹脂は、酢酸によるアセチル化が発生しないため、OH価は測定できないため、OH価の代わりに、後述する酸価を用いることができる。
なお、本発明において、カルボキシル基含有アクリル系樹脂の酸価とは、樹脂1g中に含まれる酸を中和するのに要する水酸化カリウムの量をミリグラム数で表したものであり、電位差滴定法(JIS K 0070:1992)により測定した値である。
なお、本発明において、アクリル系樹脂、アルキルフェノール系樹脂及びテルペン系樹脂のMwは、ゲル浸透クロマトグラフィー(GPC)で測定したポリスチレン換算値である。
液状ジエン系重合体は、ゲル浸透クロマトグラフィー(GPC)で測定したポリスチレン換算の重量平均分子量(Mw)が、1.0×103〜2.0×105であることが好ましく、3.0×103〜1.5×104であることがより好ましい。1.0×103未満では、グリップ性能の向上効果がなく、充分な耐久性が確保できないおそれがある。一方、2.0×105を超えると、重合溶液の粘度が高くなり過ぎ生産性が悪化したり、破壊特性、耐摩耗性が低下するおそれがある。なお、本発明において、液状ジエン系重合体のMwは、ゲル浸透クロマトグラフィー(GPC)で測定したポリスチレン換算値である。
なお、シリカのN2SAは、ASTM D3037−93に準じてBET法で測定される値である。
mM・xSiOy・zH2O
(式中、MはAl、Mg、Ti、Ca及びZrからなる群より選ばれた少なくとも1種の金属、該金属の酸化物又は水酸化物であり、mは1〜5の整数、xは0〜10の整数、yは2〜5の整数、zは0〜10の整数である。)
なお、上記無機フィラーのN2SAは、ASTM D3037−81に準じてBET法で測定される値である。
また、必要に応じて、医薬、バイオ関係で頻用されるメンブランフィルター法にて分取し、所定のN2SAを有するものを作製し、ゴム配合剤として使用することもできる。
先ず、バンバリーミキサー、オープンロールなどのゴム混練装置に硫黄及び加硫促進剤以外の成分を配合(添加)して混練りした後(ベース練り工程)、得られた混練物に、更に硫黄及び加硫促進剤を配合(添加)して混練りしその後加硫する方法などにより製造できる。
すなわち、前記成分を配合したゴム組成物を、未加硫の段階でトレッドの形状にあわせて押出し加工し、他のタイヤ部材とともに、タイヤ成型機上にて通常の方法で成形することにより、未加硫タイヤを形成する。この未加硫タイヤを加硫機中で加熱加圧することによりタイヤを得る。
窒素雰囲気下、100mlメスフラスコに3−(N,N−ジメチルアミノ)プロピルトリメトキシシラン(アヅマックス(株)製)を23.6g入れ、さらに無水ヘキサン(関東化学(株)製)を加え、全量を100mlにして作製した。
充分に窒素置換した30L耐圧容器にn−ヘキサンを18L、スチレン(関東化学(株)製)を740g、ブタジエンを1260g、テトラメチルエチレンジアミンを10mmol加え、40℃に昇温した。次に、ブチルリチウムを10mL加えた後、50℃に昇温させ3時間撹拌した。次に、上記末端変性剤を11mL追加し30分間撹拌を行った。反応溶液にメタノール15mL及び2,6−tert−ブチル−p−クレゾール0.1gを添加後、反応溶液を18Lのメタノールが入ったステンレス容器に入れて凝集体を回収した。得られた凝集体を24時間減圧乾燥させ、変性SBRを得た。
<SBR1>:旭化成(株)製のタフデン4850(スチレン含有率:40質量%、ビニル含有率:46質量%、Mw:119万、Tg:−27℃、ゴム固形分100質量部に対してオイル分50質量部含有)
<SBR2>:共重合体製造例1で作製した変性SBR(スチレン含有率:27質量%、ビニル含有率:58質量%、Mw:72万、Tg:−27℃)
<BR>:ランクセス社製のCB24(Nd系触媒を用いて合成したハイシスBR)
<NR>:TSR20
<シリカ>:Evonik社製のULTRASIL VN3(N2SA:175m2/g)
<カーボンブラック>:オリオンエンジニアドカーボンズ社製のHP180(N2SA:175m2/g、CTAB比表面積:181m2/g)
<シランカップリング剤>:Evonik社製のSi75(ビス(3−トリエトキシシリルプロピル)ジスルフィド)
<無機フィラー1>:住友化学(株)製のATH#Bの乾式粉砕品(水酸化アルミニウム、平均粒子径:0.5μm、N2SA:95m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃)
<無機フィラー2>:住友化学(株)製のATH#B(水酸化アルミニウム、平均粒子径:0.6μm、N2SA:15m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃)
<無機フィラー3>:昭和電工(株)製のハイジライトH−43(水酸化アルミニウム、平均粒子径:0.75μm、N2SA:6.7m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃)
<液状ジエン系重合体>:(株)クラレ製のL−SBR−820(液状SBR、Mw:10,000)
<添加剤1>:東京化成工業(株)製のビスフェノールAジグリシジルエーテル(式(1)で表される化合物(R1及びR2=メチル基、R3=メチレン基、R4=オキシラン基)、下記式で表される化合物)
<アクリル系樹脂(1)−1>:東亞合成(株)製のARUFON UC−3900(無溶剤型スチレンアクリル樹脂(カルボキシル基含有)、純度:98質量%以上、Tg:60℃、酸価:108mgKOH/g、Mw:4,600、N2SA:0m2/g、軟化点:80℃)
<アクリル系樹脂(1)−2>:東亞合成(株)製のARUFON UC−3900の乾式粉砕品(無溶剤型スチレンアクリル樹脂(カルボキシル基含有)、純度:98質量%以上、Tg:60℃、酸価:108mgKOH/g、Mw:4,600、N2SA:4.0m2/g、軟化点:80℃)
<アクリル系樹脂(2)−1>:東亞合成(株)製のARUFON UH−2170(無溶剤型スチレンアクリル樹脂(水酸基含有)、純度98質量%以上、Tg:60℃、OH価:88mgKOH/g、Mw:14,000、N2SA:0m2/g、軟化点:80℃)
<アクリル系樹脂(2)−2>:東亞合成(株)製のARUFON UH−2170の乾式粉砕品(無溶剤型スチレンアクリル樹脂(水酸基含有)、純度98質量%以上、Tg:60℃、OH価:88mgKOH/g、Mw:14,000、N2SA:4.0m2/g、軟化点:80℃)
<アクリル系樹脂(3)−1>:東亞合成(株)製のARUFON UC−3920(無溶剤型スチレンアクリル樹脂(カルボキシル基含有)、純度:98質量%以上、Tg:102℃、酸価:240mgKOH/g、Mw:15,500、N2SA:0m2/g、軟化点:125℃)
<アクリル系樹脂(3)−2>:東亞合成(株)製のARUFON UC−3920の乾式粉砕品(無溶剤型スチレンアクリル樹脂(カルボキシル基含有)、純度:98質量%以上、Tg:102℃、酸価:240mgKOH/g、Mw:15,500、N2SA:4.0m2/g、軟化点:125℃)
<アクリル系樹脂(4)>:東亞合成(株)製のARUFON UC−3000(無溶剤型オールアクリル樹脂(カルボキシル基含有)、純度:98質量%以上、Tg:65℃、酸価:74mgKOH/g、Mw:10,000、N2SA:4.0m2/g、軟化点:85℃)
<芳香族テルペン樹脂>:ヤスハラケミカル(株)製のYSレジンTO125(Tg:65℃、OH価:0mgKOH/g、N2SA:0m2/g、軟化点:125℃)
<テルペンフェノール樹脂>:アリゾナケミカル社製のSylvaresTP115(Tg:55℃、OH価:50mgKOH/g、Mw:600、N2SA:0m2/g、軟化点:115℃)
<アルキルフェノール系樹脂>:BASF社製のKoresin(p−t−ブチルフェノール及びアセチレンの縮合樹脂、Tg:98℃、OH価:198mgKOH/g、N2SA:0m2/g、軟化点:145℃)
<酸化亜鉛1>:ハクスイテック(株)製のジンコックスーパーF−2(平均一次粒子径:65nm、N2SA:20m2/g)
<酸化亜鉛2>:三井金属鉱業(株)製の酸化亜鉛2種
<老化防止剤1>:住友化学(株)製のアンチゲン6C(N−フェニル−N’−(1,3−ジメチル)−p−フェニレンジアミン)
<老化防止剤2>:大内新興化学工業社製のノクラック224(2,2,4−トリメチル−1,2−ジヒドロキノリン重合体)
<ステアリン酸>:日油(株)製のステアリン酸「椿」
<硫黄>:細井化学工業(株)製のHK−200−5(5%オイル含有粉末硫黄)
<加硫促進剤1>:大内新興化学工業(株)製のノクセラーDM(ジ−2−ベンゾチアゾリルジスルフィド)
<加硫促進剤2>:大内新興化学工業(株)製のノクセラーNS(N−tert−ブチル−2−ベンゾチアゾリルスルフェンアミド)
<加硫促進剤3>:大内新興化学工業(株)製のノクセラーD(ジフェニルグアニジン)
<加硫促進剤4>:大内新興化学工業(株)製のノクセラーTOT−N(テトラキス(2−エチルヘキシル)チウラムジスルフィド)
表1、2に示す配合処方に従い、神戸製鋼(株)製4.0Lバンバリーを用いて硫黄及び加硫促進剤1〜4以外の配合材料を排出温度150℃の条件下で5分間混練りした。得られた混練り物に硫黄及び加硫促進剤を添加し、オープンロールを用いて排出温度95℃の条件下で4分間練り込み、未加硫ゴム組成物を得た。得られた未加硫ゴム組成物をトレッドの形状に成形し、タイヤ成形機上で他のタイヤ部材とともに貼り合わせ、160℃の条件下で20分間加硫し、試験用タイヤ(タイヤサイズ:215/45R17)を得た。
上記試験用タイヤを排気量2000ccの国産FR車に装着し、ドライアスファルト路面のテストコースにて10周の実車走行を行った。その際に2周目における操舵時のコントロールの安定性をテストドライバーが評価し、基準比較例を100として指数表示をした(初期グリップ性能指数)。数値が大きいほど初期グリップ性能が高いことを示す。指数値が104以上の場合に特に良好であると判断した。
上記試験用タイヤを排気量2000ccの国産FR車に装着し、ドライアスファルト路面のテストコースにて10周の実車走行を行った。その際における、ベストラップと最終ラップの操舵時のコントロールの安定性をテストドライバーが比較評価し、基準比較例を100として指数表示をした。数値が大きいほどドライ路面において、走行中・後期のグリップ性能の低下が小さく、走行中・後期の安定したグリップ性能が良好に得られることを示す。指数値が104以上の場合に特に良好であると判断した。
上記試験用タイヤを排気量2000ccの国産FR車に装着し、ドライアスファルト路面のテストコースにて実車走行を行った。その際におけるタイヤトレッドゴムの残溝量を計測し(新品時7.0mm)、それぞれ基準比較例の残溝量を100として指数表示した(耐摩耗性指数)。数値が大きいほど、耐摩耗性が高いことを示す。指数値が85以上の場合に良好であると判断した。
Claims (8)
- カーボンブラック及び/又はシリカ、並びにスチレン含有率が19〜60質量%のスチレンブタジエンゴムを含有し、
前記ゴム成分100質量%中の前記スチレンブタジエンゴムの含有量が10〜100質量%、前記ゴム成分100質量部に対して、前記カーボンブラック及び前記シリカの合計含有量が30〜150質量部である請求項1記載のゴム組成物。 - カルボキシル基及び/又は水酸基を有するアクリル系樹脂を含有する請求項1又は2記載のゴム組成物。
- グリップ力が必要な用途に用いられる請求項1〜3のいずれかに記載のゴム組成物。
- 靴底ゴム用ゴム組成物である請求項1〜3のいずれかに記載のゴム組成物。
- 産業用ベルト用ゴム組成物である請求項1〜3のいずれかに記載のゴム組成物。
- タイヤのトレッド用ゴム組成物である請求項1〜3のいずれかに記載のゴム組成物。
- 請求項1〜3のいずれかに記載のゴム組成物を用いて作製したトレッドを有する空気入りタイヤ。
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JP2014170543A Expired - Fee Related JP5944964B2 (ja) | 2014-08-25 | 2014-08-25 | ゴム組成物及び空気入りタイヤ |
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US (1) | US20170210881A1 (ja) |
EP (1) | EP3187532A4 (ja) |
JP (1) | JP5944964B2 (ja) |
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JP2016056238A (ja) * | 2014-09-05 | 2016-04-21 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2017218042A (ja) * | 2016-06-08 | 2017-12-14 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2018154750A (ja) * | 2017-03-17 | 2018-10-04 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
JP2019189756A (ja) * | 2018-04-25 | 2019-10-31 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
JP2019194289A (ja) * | 2018-05-02 | 2019-11-07 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
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US11547174B2 (en) * | 2018-11-12 | 2023-01-10 | The Goodyear Tire & Rubber Company | Footwear and rubber sole containing dual silica moieties |
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- 2015-07-27 US US15/329,631 patent/US20170210881A1/en not_active Abandoned
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JPS5543143A (en) * | 1978-09-25 | 1980-03-26 | Asahi Glass Co Ltd | Crosslinked rubber containing chlorine |
JPH08245842A (ja) * | 1995-03-13 | 1996-09-24 | Nichias Corp | 加硫ゴム組成物 |
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JP2016056238A (ja) * | 2014-09-05 | 2016-04-21 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2017218042A (ja) * | 2016-06-08 | 2017-12-14 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2018154750A (ja) * | 2017-03-17 | 2018-10-04 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
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JP2020152752A (ja) * | 2019-03-18 | 2020-09-24 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物およびそれを用いた空気入りタイヤ |
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JP7259522B2 (ja) | 2019-04-25 | 2023-04-18 | 住友ゴム工業株式会社 | トレッド用ゴム組成物 |
Also Published As
Publication number | Publication date |
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EP3187532A1 (en) | 2017-07-05 |
EP3187532A4 (en) | 2018-05-16 |
CN106574083A (zh) | 2017-04-19 |
JP5944964B2 (ja) | 2016-07-05 |
US20170210881A1 (en) | 2017-07-27 |
WO2016031460A1 (ja) | 2016-03-03 |
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