JP2010116556A - ゴム組成物およびそれを用いたタイヤ - Google Patents
ゴム組成物およびそれを用いたタイヤ Download PDFInfo
- Publication number
- JP2010116556A JP2010116556A JP2009238514A JP2009238514A JP2010116556A JP 2010116556 A JP2010116556 A JP 2010116556A JP 2009238514 A JP2009238514 A JP 2009238514A JP 2009238514 A JP2009238514 A JP 2009238514A JP 2010116556 A JP2010116556 A JP 2010116556A
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- JP
- Japan
- Prior art keywords
- mass
- styrene
- hydrocarbon group
- ethyl
- carbon atoms
- 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.)
- Granted
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 52
- 239000005060 rubber Substances 0.000 title claims abstract description 52
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- -1 diene compound Chemical class 0.000 claims abstract description 41
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- 239000006229 carbon black Substances 0.000 claims abstract description 15
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 26
- 239000001257 hydrogen Substances 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 125000001931 aliphatic group Chemical group 0.000 claims description 12
- 229920006395 saturated elastomer Polymers 0.000 claims description 10
- 125000002723 alicyclic group Chemical group 0.000 claims description 9
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 125000000623 heterocyclic group Chemical group 0.000 claims description 5
- 125000006413 ring segment Chemical group 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 20
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 64
- 229920001084 poly(chloroprene) Polymers 0.000 description 34
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 20
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 18
- 239000000178 monomer Substances 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 229920002857 polybutadiene Polymers 0.000 description 11
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 10
- 239000005062 Polybutadiene Substances 0.000 description 9
- 239000006087 Silane Coupling Agent Substances 0.000 description 9
- 238000009826 distribution Methods 0.000 description 9
- 244000043261 Hevea brasiliensis Species 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000013329 compounding Methods 0.000 description 8
- 229920003052 natural elastomer Polymers 0.000 description 8
- 229920001194 natural rubber Polymers 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 150000002642 lithium compounds Chemical class 0.000 description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 6
- 239000002174 Styrene-butadiene Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 150000002430 hydrocarbons Chemical group 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 4
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 4
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 4
- 239000003505 polymerization initiator Substances 0.000 description 4
- 239000005049 silicon tetrachloride Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 description 3
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- 229920005549 butyl rubber Polymers 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 150000001993 dienes Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910017464 nitrogen compound Inorganic materials 0.000 description 3
- 150000002830 nitrogen compounds Chemical class 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- GRVAGTQLVKBPLL-UHFFFAOYSA-N 1-[2-(4-ethenylphenyl)ethyl]azepane Chemical compound C1=CC(C=C)=CC=C1CCN1CCCCCC1 GRVAGTQLVKBPLL-UHFFFAOYSA-N 0.000 description 2
- LMAFWBCYAPNOFK-UHFFFAOYSA-N 1-[2-(4-ethenylphenyl)ethyl]pyrrolidine Chemical compound C1=CC(C=C)=CC=C1CCN1CCCC1 LMAFWBCYAPNOFK-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- SDJHPPZKZZWAKF-UHFFFAOYSA-N 2,3-dimethylbuta-1,3-diene Chemical compound CC(=C)C(C)=C SDJHPPZKZZWAKF-UHFFFAOYSA-N 0.000 description 2
- OHDSHGBRKMRPHC-UHFFFAOYSA-N 2-(4-ethenylphenyl)-n,n-dimethylethanamine Chemical compound CN(C)CCC1=CC=C(C=C)C=C1 OHDSHGBRKMRPHC-UHFFFAOYSA-N 0.000 description 2
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 2
- WJUHASGUDSZAIJ-UHFFFAOYSA-N 4-[2-(4-ethenylphenyl)ethyl]morpholine Chemical compound C1=CC(C=C)=CC=C1CCN1CCOCC1 WJUHASGUDSZAIJ-UHFFFAOYSA-N 0.000 description 2
- 0 CC(*)CN(*)* Chemical compound CC(*)CN(*)* 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 125000006534 ethyl amino methyl group Chemical group [H]N(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- QMMOXUPEWRXHJS-UHFFFAOYSA-N pentene-2 Natural products CCC=CC QMMOXUPEWRXHJS-UHFFFAOYSA-N 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- AHAREKHAZNPPMI-AATRIKPKSA-N (3e)-hexa-1,3-diene Chemical compound CC\C=C\C=C AHAREKHAZNPPMI-AATRIKPKSA-N 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- HIACAHMKXQESOV-UHFFFAOYSA-N 1,2-bis(prop-1-en-2-yl)benzene Chemical compound CC(=C)C1=CC=CC=C1C(C)=C HIACAHMKXQESOV-UHFFFAOYSA-N 0.000 description 1
- CORMBJOFDGICKF-UHFFFAOYSA-N 1,3,5-trimethoxy 2-vinyl benzene Natural products COC1=CC(OC)=C(C=C)C(OC)=C1 CORMBJOFDGICKF-UHFFFAOYSA-N 0.000 description 1
- IBVPVTPPYGGAEL-UHFFFAOYSA-N 1,3-bis(prop-1-en-2-yl)benzene Chemical compound CC(=C)C1=CC=CC(C(C)=C)=C1 IBVPVTPPYGGAEL-UHFFFAOYSA-N 0.000 description 1
- WZDBFKKBMMGPTK-UHFFFAOYSA-N 1-[2-(4-ethenylphenyl)ethyl]-2,2,6,6-tetramethylpiperidine Chemical compound CC1(C)CCCC(C)(C)N1CCC1=CC=C(C=C)C=C1 WZDBFKKBMMGPTK-UHFFFAOYSA-N 0.000 description 1
- CHPMVJPDQCNCFY-UHFFFAOYSA-N 1-[2-(4-ethenylphenyl)ethyl]-2,5-dimethylpyrrolidine Chemical compound CC1CCC(C)N1CCC1=CC=C(C=C)C=C1 CHPMVJPDQCNCFY-UHFFFAOYSA-N 0.000 description 1
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- VGEUBSCBBKDYGQ-UHFFFAOYSA-N n-[2-(4-ethenylphenyl)ethyl]-n-phenylaniline Chemical compound C1=CC(C=C)=CC=C1CCN(C=1C=CC=CC=1)C1=CC=CC=C1 VGEUBSCBBKDYGQ-UHFFFAOYSA-N 0.000 description 1
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- HMMPCBAWTWYFLR-UHFFFAOYSA-N n-pyridin-2-ylpyridin-2-amine Chemical compound C=1C=CC=NC=1NC1=CC=CC=N1 HMMPCBAWTWYFLR-UHFFFAOYSA-N 0.000 description 1
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- 159000000001 potassium salts Chemical class 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
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- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 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
- KLFNHRIZTXWZHT-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltrisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSCCC[Si](OCC)(OCC)OCC KLFNHRIZTXWZHT-UHFFFAOYSA-N 0.000 description 1
- JSXKIRYGYMKWSK-UHFFFAOYSA-N trimethoxy-[2-(2-trimethoxysilylethyltetrasulfanyl)ethyl]silane Chemical compound CO[Si](OC)(OC)CCSSSSCC[Si](OC)(OC)OC JSXKIRYGYMKWSK-UHFFFAOYSA-N 0.000 description 1
- 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
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
【解決手段】ゴム成分100質量%中に、共役ジエン化合物および/または芳香族ビニル化合物と特定の窒素含有化合物とを共重合して得られた重合体を5質量%以上含み、
該ゴム成分100質量部に対してカーボンブラックを1〜20質量部、シリカを5質量部以上含むことを特徴とするゴム組成物である。
【選択図】なし
Description
で表される窒素含有化合物とを共重合して得られた重合体を5質量%以上含み、該ゴム成分100質量部に対してカーボンブラックを1〜20質量部、シリカを5質量部以上含むことを特徴とするゴム組成物に関する。
で表される窒素含有化合物とを共重合して得られた重合体を5質量%以上含み、
該ゴム成分100質量部に対してカーボンブラックを100〜180質量部、軟化剤を50質量部以上含む。
また、R0及びR8〜R14は、水素又は炭素数1〜2の脂肪族炭化水素基であることが好ましい。
また、R4〜R7は、脂肪族炭化水素基、芳香族炭化水素基又は複素環基であることが好ましく、脂肪族炭化水素基であることがより好ましい。
シクロヘキサン:関東化学(株)製シクロヘキサン
ピロリジン:関東化学(株)製ピロリジン
ヘキサメチレンイミン:関東化学(株)製ヘキサメチレンイミン
モルホリン:関東化学(株)製モルホリン
チアゾリジン:東京化成工業(株)製のチアゾリジン
4−ピペリジノピペリジン:関東化学(株)製の4−ピペリジノピペリジン
4−ジメチルアミノ−2,2,6,6−テトラメチルピペリジン:シグマアルドリッチ社製の4−ジメチルアミノ−2,2,6,6−テトラメチルピペリジン
ジプロピルアミン:シグマアルドリッチ社製のジプロピルアミン
ジフェニルアミン:シグマアルドリッチ社製のジフェニルアミン
2,2’−ジピリジルアミン:シグマアルドリッチ社製の2,2’−ジピリジルアミン
ジビニルベンゼン:シグマアルドリッチ社製のジビニルベンゼン
1,3−ジイソプロペニルベンゼン:シグマアルドリッチ社製の1,3−ジイソプロペニルベンゼン
1.6M n−ブチルリチウムヘキサン溶液:関東化学(株)製の1.6M n−ブチルリチウムヘキサン溶液
イソプロパノール:関東化学(株)製のイソプロパノール
十分に窒素置換した100ml容器に、シクロヘキサン50ml、ピロリジン4.1ml(3.6g)、ジビニルベンゼン8.9ml(6.5g)を加え、0℃にて1.6M n−ブチルリチウムヘキサン溶液0.7mlを加えて攪拌した。1時間後、イソプロパノールを加えて反応を停止させ、抽出・精製を行うことでモノマー(1)を得た。
表1に示す処方に従って、モノマー(1)と同様の処方にてモノマー(2)〜(10)を得た。
シクロヘキサン:関東化学(株)製のシクロヘキサン
スチレン:関東化学(株)製のスチレン
ブタジエン:高千穂化学工業(株)製の1,3−ブタジエン
テトラメチルエチレンジアミン:関東化学(株)製のN,N,N’,N’−テトラメチルエチレンジアミン
1.6M n−ブチルリチウムヘキサン溶液:関東化学(株)製の1.6M n−ブチルリチウムヘキサン溶液
1.0M 四塩化ケイ素:シグマアルドリッチ社製の四塩化ケイ素をシクロヘキサンで1.0Mに希釈したもの
イソプロパノール:関東化学(株)製のイソプロパノール
重合体(1)の合成
十分に窒素置換した1000ml耐圧製容器に、シクロヘキサン600ml、スチレン12.6ml(11.4g)、ブタジエン71.0ml(41.0g)、モノマー(1)0.29g、テトラメチルエチレンジアミン0.11mlを加え、40℃で1.6M n−ブチルリチウムヘキサン溶液0.2mlを加えて撹拌した。3時間後、1.0M四塩化ケイ素を0.1ml添加して重合体をカップリングさせた。30分後、イソプロパノール2mlを加えて重合を停止させた。反応溶液に2,6−tert−ブチル−p−クレゾール1gを添加後、メタノールで再沈殿処理を行い、加熱乾燥させて重合体(1)を得た。
重合体(2)〜(12)の合成
表2に示す処方に従って、重合体(1)と同様の処方により重合体(2)〜(12)を得た。
重量平均分子量Mwは、ゲルパーミエーションクロマトグラフ(GPC)(東ソー(株)製GPC−8000シリーズ、検出器:示差屈折計、カラム:東ソー(株)製のTSKGEL SUPERMALTPORE HZ−M)を用い、分子量は標準ポリスチレンにより校正した。低分子量側のピークをピーク1とし、高分子量側のピークをピーク2として重量平均分子量を算出した。また、ピーク1と2の面積比より、カップリング率を算出した。
重合体中の窒素含有化合物誘導体モノマー量は、日本電子(株)製JNM−ECAシリーズの装置を用いて測定した。
以下に、実施例および比較例で用いた各種薬品について説明する。
NR:RSS#3
BR:宇部興産(株)製のウベポールBR150L
カーボンブラック:キャボットジャパン(株)製のショウブラックN220(チッ素吸着比表面積(N2SA):125m2/g)
シリカ:デグッサ社製のウルトラシルVN3(チッ素吸着比表面積(N2SA):210m2/g)
シランカップリング剤:デグッサ社製のSi69
オイル:(株)ジャパンエナジー製のJOMOプロセスX140
ステアリン酸:日油(株)製のステアリン酸
酸化亜鉛:三井金属鉱業(株)製の亜鉛華1号
老化防止剤:大内新興化学工業(株)製のノクラック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)
硫黄:鶴見化学(株)製の粉末硫黄
加硫促進剤1:大内新興化学工業(株)製のノクセラーNS
加硫促進剤2:大内新興化学工業(株)製のノクセラーD
(株)上島製作所製スペクトロメーターを用いて、動的歪振幅1%、周波数10Hz、温度60℃でtanδを測定した。tanδの逆数の値について比較例1を100として指数表示した。数値が大きいほど低燃費であることを示している。
(株)上島製作所製フラットベルト式摩擦試験機(FR5010型)を用いてグリップ性能を評価した。幅20mm、直径100mmの円筒形のゴム試験片を用い、速度20km/時間、荷重4kgf、路面温度20℃の条件で、路面に対するサンプルのスリップ率を0〜50%まで変化させ、その際に検出される摩擦係数の最大値を読みとった。比較例1を100として指数表示した。指数が大きいほどウェットグリップ性能が高いことを示す。
前記未加硫ゴム組成物をトレッドの形状に成形し、他のタイヤ部材とともに貼り合わせて未加硫タイヤを形成し、170℃の条件下で10分間プレス加硫し、タイヤ(サイズ195/65R15)を製造した。水を撒いて湿潤路面としたテストコースにて、タイヤを排気量2000ccの国産FR車に装着し、速度70km/hで制動し、タイヤに制動をかけてから停車するまでの走行距離(制動距離)を測定し、その距離の逆数の値を比較例1を100として、それぞれ指数表示した。数値が大きいほどウェットグリップ性能が高いことを示す。
Claims (3)
- ゴム成分100質量%中に、共役ジエン化合物および/または芳香族ビニル化合物と下記一般式
で表される窒素含有化合物とを共重合して得られた重合体を5質量%以上含み、
該ゴム成分100質量部に対してカーボンブラックを1〜20質量部、シリカを5質量部以上含むことを特徴とするゴム組成物。 - 前記重合体における窒素含有化合物の含有量が0.05〜30質量%である請求項1に記載のゴム組成物。
- 請求項1または2に記載のゴム組成物を用いて作製したタイヤ。
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