JP5405250B2 - ゴム組成物及びその製造方法、並びに空気入りタイヤ - Google Patents
ゴム組成物及びその製造方法、並びに空気入りタイヤ Download PDFInfo
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- JP5405250B2 JP5405250B2 JP2009215873A JP2009215873A JP5405250B2 JP 5405250 B2 JP5405250 B2 JP 5405250B2 JP 2009215873 A JP2009215873 A JP 2009215873A JP 2009215873 A JP2009215873 A JP 2009215873A JP 5405250 B2 JP5405250 B2 JP 5405250B2
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- Prior art keywords
- amine
- rubber
- compound
- aging agent
- white filler
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- 229920001971 elastomer Polymers 0.000 title claims description 91
- 239000005060 rubber Substances 0.000 title claims description 91
- 239000000203 mixture Substances 0.000 title claims description 83
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 150000001412 amines Chemical class 0.000 claims description 90
- 239000003795 chemical substances by application Substances 0.000 claims description 74
- 239000000945 filler Substances 0.000 claims description 70
- 230000003712 anti-aging effect Effects 0.000 claims description 69
- 150000002989 phenols Chemical class 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 40
- 239000003963 antioxidant agent Substances 0.000 claims description 35
- 230000003078 antioxidant effect Effects 0.000 claims description 35
- -1 phenol compound Chemical class 0.000 claims description 33
- 235000013824 polyphenols Nutrition 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 16
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- 239000000155 melt Substances 0.000 claims description 6
- 235000006708 antioxidants Nutrition 0.000 description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 21
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 20
- 230000003647 oxidation Effects 0.000 description 19
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 6
- VFLDPWHFBUODDF-FCXRPNKRSA-N curcumin Chemical compound C1=C(O)C(OC)=CC(\C=C\C(=O)CC(=O)\C=C\C=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-FCXRPNKRSA-N 0.000 description 6
- MWDZOUNAPSSOEL-UHFFFAOYSA-N kaempferol Natural products OC1=C(C(=O)c2cc(O)cc(O)c2O1)c3ccc(O)cc3 MWDZOUNAPSSOEL-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
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- PZIRUHCJZBGLDY-UHFFFAOYSA-N Caffeoylquinic acid Natural products CC(CCC(=O)C(C)C1C(=O)CC2C3CC(O)C4CC(O)CCC4(C)C3CCC12C)C(=O)O PZIRUHCJZBGLDY-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- CWVRJTMFETXNAD-KLZCAUPSSA-N Neochlorogenin-saeure Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)c(O)c2)[C@@H]1O)C(=O)O CWVRJTMFETXNAD-KLZCAUPSSA-N 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
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- 239000006229 carbon black Substances 0.000 description 3
- CWVRJTMFETXNAD-JUHZACGLSA-N chlorogenic acid Chemical compound O[C@@H]1[C@H](O)C[C@@](O)(C(O)=O)C[C@H]1OC(=O)\C=C\C1=CC=C(O)C(O)=C1 CWVRJTMFETXNAD-JUHZACGLSA-N 0.000 description 3
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- 235000001368 chlorogenic acid Nutrition 0.000 description 3
- BMRSEYFENKXDIS-KLZCAUPSSA-N cis-3-O-p-coumaroylquinic acid Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)cc2)[C@@H]1O)C(=O)O BMRSEYFENKXDIS-KLZCAUPSSA-N 0.000 description 3
- 229940125904 compound 1 Drugs 0.000 description 3
- 229940125782 compound 2 Drugs 0.000 description 3
- 235000012754 curcumin Nutrition 0.000 description 3
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- VFLDPWHFBUODDF-UHFFFAOYSA-N diferuloylmethane Natural products C1=C(O)C(OC)=CC(C=CC(=O)CC(=O)C=CC=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-UHFFFAOYSA-N 0.000 description 3
- 150000002430 hydrocarbons Chemical group 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
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- 239000008117 stearic acid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
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- 239000011787 zinc oxide Substances 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 2
- BYLSIPUARIZAHZ-UHFFFAOYSA-N 2,4,6-tris(1-phenylethyl)phenol Chemical compound C=1C(C(C)C=2C=CC=CC=2)=C(O)C(C(C)C=2C=CC=CC=2)=CC=1C(C)C1=CC=CC=C1 BYLSIPUARIZAHZ-UHFFFAOYSA-N 0.000 description 2
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 description 2
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 2
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 description 2
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 description 2
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- XMOCLSLCDHWDHP-IUODEOHRSA-N epi-Gallocatechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@H]2O)=CC(O)=C(O)C(O)=C1 XMOCLSLCDHWDHP-IUODEOHRSA-N 0.000 description 2
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- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
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- LRDGATPGVJTWLJ-UHFFFAOYSA-N luteolin Natural products OC1=CC(O)=CC(C=2OC3=CC(O)=CC(O)=C3C(=O)C=2)=C1 LRDGATPGVJTWLJ-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
(B1)溶融したアミン系老化防止剤で白色充填剤を処理してなる処理充填剤に、フェノール系化合物を添加し混合して、上記混合物を調製する方法と、
(B2)溶融したフェノール系化合物で白色充填剤を処理してなる処理充填剤に、アミン系老化防止剤を添加し混合して、上記混合物を調製する方法
がある。これらの方法であると、後記実施例に示すように、(A)の方法よりも外観性と耐酸化劣化性の持続効果を高めることができる。
実施例におけるゴム組成物の共通配合は、天然ゴム(RSS#3)50重量部、ブタジエンゴム(宇部興産株式会社製「BR150」)50重量部、HAF級カーボンブラック(東海カーボン株式会社製「シースト3」)60重量部、亜鉛華(三井金属鉱業株式会社製「1号亜鉛華」)3重量部、ステアリン酸(花王株式会社製「工業用ステアリン酸」)2重量部、硫黄(鶴見化学工業株式会社製「5%油処理粉末硫黄」)2重量部、及び、加硫促進剤NS(大内新興化学工業株式会社製「ノクセラーNS−P」)1重量部とした。
・モノフェノール化合物1:スチレン化フェノール、川口化学工業株式会社製「アンテージSP」
・モノフェノール化合物2:p−フェニルフェノール、三光株式会社製「P−PP」
・ビスフェノール化合物1:2,2’−メチレンビス(4−メチル−6−tert−ブチルフェノール)、大内新興化学工業株式会社製「ノクラックNS−6」
・ビスフェノール化合物2:2,2’−メチレンビス(4−エチル−6−tert−ブチルフェノール)、大内新興化学工業株式会社製「ノクラックNS−5」
・ビスフェノール化合物3:4,4’−チオビス(3−メチル−6−tert−ブチルフェノール)、大内新興化学工業株式会社製「ノクラック300」
・ポリフェノール化合物1:ケルセチン(クエルセチン)、横浜油脂工業株式会社製
・ポリフェノール化合物2:リグニンスルホン酸塩、日本製紙ケミカル株式会社製「バニレックスN」
・ポリフェノール化合物3:クロロゲン酸、ナカライテスク株式会社製
・ポリフェノール化合物4:タンニン、川村通商株式会社製「タンニン剤ミモザ」
・ポリフェノール化合物5:クルクミン、ナカライテスク株式会社製。
・白色充填剤2:炭酸カルシウム、白石工業株式会社製「白艶華CC」
・白色充填剤3:クレー、白石カルシウム株式会社製「ハードクレーH−144」
・白色充填剤4:酸化マグネシウム、協和化学工業株式会社製「キョーワマグ150」
・白色充填剤5:アルミナ水和物、日本軽金属株式会社製「B703」。
(実施例1)
アミン系老化防止剤(A)とフェノール系化合物(B)を、オイルバスにて150℃で双方溶融させて混合し、得られた溶融状態の溶融混合物(X)に白色充填剤(Y)を添加し、混合して事前混合物(X+Y)を得た。次いで、バンバリーミキサーを使用し、常法に従い、まず第一混合段階で、ジエン系ゴムに対し、上記事前混合物を、硫黄及び加硫促進剤を除く他の配合剤とともに添加し混練し、次いで、得られた混練物に、最終混合段階で、硫黄と加硫促進剤を添加し混練して、ゴム組成物を調製した。
アミン系老化防止剤(A)の配合量、フェノール系化合物(B)の種類及び配合量、並びに白色充填剤(Y)の種類及び配合量を除き、実施例1と同様にしてゴム組成物を調製した。但し、実施例6,9では、アミン系老化防止剤とフェノール系化合物の溶融混合温度を180℃として、双方を溶融させた。実施例10では、溶融混合温度は150℃であるが、この温度ではケルセチンは溶融しないので、ケルセチンは粉末のまま溶融状態のアミン系老化防止剤と混合した。実施例12のクロロゲン酸、及び実施例13のタンニンについても、実施例10と同様に、粉末のまま溶融状態のアミン系老化防止剤と混合した。一方、実施例14では、溶融混合温度を200℃として、アミン系老化防止剤とクルクミンの双方を溶融させた。
アミン系老化防止剤をオイルバスにて150℃で溶融させ、これに白色充填剤を添加し混合して処理充填剤を作製し、得られた処理充填剤にフェノール系化合物を粉末のまままぶすように添加し混合して事前混合物を調製し、あとは実施例1と同様にしてゴム組成物を調製した。
フェノール系化合物をオイルバスにて200℃で溶融させ、これに白色充填剤を添加し混合して処理充填剤を作製し、得られた処理充填剤にアミン系老化防止剤を添加し混合して事前混合物を調製し、あとは実施例1と同様にしてゴム組成物を調製した。
比較例1では、アミン系老化防止剤を、他の配合剤とともにそのままジエン系ゴムに添加してゴム組成物を調製した。
破断伸びの保持率(%)=100×(老化後破断伸び)/(老化前破断伸び)
保持率が高いほど、耐酸化劣化性に優れ、老化2ヶ月後にも高い保持率を示すことで長期老化性(即ち、耐酸化劣化性の持続効果)に優れることを意味する。
○:わずかに茶色または白色に変色している、
△:やや茶色または白色に変色している、
×:茶褐色または白色に変色している。
○:肉眼では確認できないが10倍の拡大鏡では確認できるクラックが発生している、
△:1mm以下のクラックが発生している、
×:1mmを超えるクラックが発生している。
Claims (6)
- ジエン系ゴムからなるゴム成分に、アミン系老化防止剤とフェノール系化合物と白色充填剤を事前に混合させた混合物を配合してなり、前記ゴム成分100重量部に対して、前記アミン系老化防止剤を0.5〜8重量部、前記フェノール系化合物を0.5〜8重量部、及び前記白色充填剤を0.1〜40重量部含有するゴム組成物。
- 前記フェノール系化合物が、モノフェノール化合物、ビスフェノール化合物及びポリフェノール化合物からなる群より選択される少なくとも1種の化合物である請求項1記載のゴム組成物。
- 前記混合物は、前記アミン系老化防止剤と前記フェノール系化合物の少なくとも一方を溶融して当該アミン系老化防止剤とフェノール系化合物を混合した溶融混合物と、白色充填剤とを混合してなるものである請求項1又は2記載のゴム組成物。
- 前記混合物は、前記アミン系老化防止剤と前記フェノール系化合物のいずれか一方の溶融物で前記白色充填剤を処理してなる処理充填剤に、前記アミン系老化防止剤と前記フェノール系化合物のいずれか他方を添加し混合してなるものである請求項1又は2記載のゴム組成物。
- アミン系老化防止剤とフェノール系化合物と白色充填剤を混合し、得られた混合物を、ジエン系ゴムからなるゴム成分100重量部に対して前記アミン系老化防止剤が0.5〜8重量部、前記フェノール系化合物が0.5〜8重量部、及び前記白色充填剤が0.1〜40重量部配合されるように、前記ゴム成分と混合する、ゴム組成物の製造方法。
- 請求項1〜4のいずれか1項に記載のゴム組成物を用いた空気入りタイヤ。
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JP5647170B2 (ja) * | 2012-04-13 | 2014-12-24 | 住友ゴム工業株式会社 | サイドウォール又はクリンチ用ゴム組成物、及び空気入りタイヤ |
US9259975B2 (en) * | 2013-03-15 | 2016-02-16 | The Goodyear Tire & Rubber Company | Tire with outer groove containing bonded tube |
JP6424594B2 (ja) * | 2014-12-01 | 2018-11-21 | 横浜ゴム株式会社 | ゴム組成物およびそれを用いた空気入りタイヤ |
JP6435818B2 (ja) * | 2014-12-03 | 2018-12-12 | 横浜ゴム株式会社 | ゴム組成物およびそれを用いた空気入りタイヤ |
JP6428371B2 (ja) * | 2015-02-26 | 2018-11-28 | 横浜ゴム株式会社 | ランフラットライナー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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US5244028A (en) * | 1992-05-20 | 1993-09-14 | The Goodyear Tire & Rubber Company | Tire sidewall composition containing silica having low pH |
JPH1192570A (ja) * | 1997-09-19 | 1999-04-06 | Bridgestone Corp | ゴム用薬品マスターバッチ、そのマスターバッチを使用したゴム組成物の混練方法及びその方法により得られたゴム組成物 |
JP4447744B2 (ja) * | 2000-06-28 | 2010-04-07 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物 |
JP4620481B2 (ja) * | 2005-02-04 | 2011-01-26 | 株式会社ブリヂストン | 老化防止剤含有ウェットマスターバッチ及びその製造方法、並びにこれを用いたゴム組成物及びタイヤ |
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