JP2014047325A - タイヤ用ゴム組成物及び空気入りタイヤ - Google Patents
タイヤ用ゴム組成物及び空気入りタイヤ Download PDFInfo
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- JP2014047325A JP2014047325A JP2012193404A JP2012193404A JP2014047325A JP 2014047325 A JP2014047325 A JP 2014047325A JP 2012193404 A JP2012193404 A JP 2012193404A JP 2012193404 A JP2012193404 A JP 2012193404A JP 2014047325 A JP2014047325 A JP 2014047325A
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- 239000005060 rubber Substances 0.000 title claims abstract description 89
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- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 86
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 80
- 150000001875 compounds Chemical class 0.000 claims abstract description 41
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 40
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 30
- 239000005077 polysulfide Substances 0.000 claims abstract description 28
- 229920001021 polysulfide Polymers 0.000 claims abstract description 28
- 150000008117 polysulfides Polymers 0.000 claims abstract description 28
- 150000002430 hydrocarbons Chemical group 0.000 claims abstract description 19
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- 125000003396 thiol group Chemical group [H]S* 0.000 claims abstract description 16
- 238000004898 kneading Methods 0.000 claims description 32
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 125000002947 alkylene group Chemical group 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- 125000001424 substituent group Chemical group 0.000 claims description 13
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- 125000003342 alkenyl group Chemical group 0.000 claims description 9
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- 125000004419 alkynylene group Chemical group 0.000 claims description 7
- 125000003118 aryl group Chemical group 0.000 claims description 5
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
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- 229910052757 nitrogen Inorganic materials 0.000 description 48
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- 238000004073 vulcanization Methods 0.000 description 16
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
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- 230000000052 comparative effect Effects 0.000 description 8
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- 244000043261 Hevea brasiliensis Species 0.000 description 7
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- 125000001931 aliphatic group Chemical group 0.000 description 4
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
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- 125000002347 octyl 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])[H] 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 4
- TXDNPSYEJHXKMK-UHFFFAOYSA-N sulfanylsilane Chemical compound S[SiH3] TXDNPSYEJHXKMK-UHFFFAOYSA-N 0.000 description 4
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 4
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- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical group CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 3
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 3
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- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 3
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000001400 nonyl 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])[H] 0.000 description 3
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 3
- OBDUMNZXAIUUTH-HWKANZROSA-N (e)-tetradec-2-ene Chemical group CCCCCCCCCCC\C=C\C OBDUMNZXAIUUTH-HWKANZROSA-N 0.000 description 2
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 2
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 2
- 125000006039 1-hexenyl group Chemical group 0.000 description 2
- 125000006023 1-pentenyl group Chemical group 0.000 description 2
- 125000006017 1-propenyl group Chemical group 0.000 description 2
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 2
- 125000006040 2-hexenyl group Chemical group 0.000 description 2
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 2
- 125000006024 2-pentenyl group Chemical group 0.000 description 2
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
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- 239000005062 Polybutadiene Substances 0.000 description 2
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- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000000304 alkynyl group Chemical group 0.000 description 2
- 125000000732 arylene group Chemical group 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- 238000005859 coupling reaction Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 125000002704 decyl group Chemical group [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])* 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 2
- 125000005677 ethinylene group Chemical group [*:2]C#C[*:1] 0.000 description 2
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
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- XUWHAWMETYGRKB-UHFFFAOYSA-N piperidin-2-one Chemical compound O=C1CCCCN1 XUWHAWMETYGRKB-UHFFFAOYSA-N 0.000 description 2
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- ZYAASQNKCWTPKI-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propan-1-amine Chemical compound CO[Si](C)(OC)CCCN ZYAASQNKCWTPKI-UHFFFAOYSA-N 0.000 description 1
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- FPAUAYUDQVPBDE-UHFFFAOYSA-N 4,6-dimethylpiperidin-2-one Chemical compound CC1CC(C)NC(=O)C1 FPAUAYUDQVPBDE-UHFFFAOYSA-N 0.000 description 1
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- VTQGYRVGBASLDF-UHFFFAOYSA-N 4-aminoazepan-2-one Chemical compound NC1CCCNC(=O)C1 VTQGYRVGBASLDF-UHFFFAOYSA-N 0.000 description 1
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- CMLIOZVGATVIFL-UHFFFAOYSA-N 4-propan-2-ylazepan-2-one Chemical compound CC(C)C1CCCNC(=O)C1 CMLIOZVGATVIFL-UHFFFAOYSA-N 0.000 description 1
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- AYGNBIMHBBDMHI-UHFFFAOYSA-N 7-[(7-oxoazepan-2-yl)disulfanyl]azepan-2-one Chemical compound N1C(=O)CCCCC1SSC1NC(=O)CCCC1 AYGNBIMHBBDMHI-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
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- 238000005481 NMR spectroscopy Methods 0.000 description 1
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- 239000000654 additive Substances 0.000 description 1
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- 239000000427 antigen Substances 0.000 description 1
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- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
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- YMLFYGFCXGNERH-UHFFFAOYSA-K butyltin trichloride Chemical compound CCCC[Sn](Cl)(Cl)Cl YMLFYGFCXGNERH-UHFFFAOYSA-K 0.000 description 1
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- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000003493 decenyl group Chemical group [H]C([*])=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])[H] 0.000 description 1
- 125000005070 decynyl group Chemical group [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#C* 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
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- 125000005980 hexynyl group Chemical group 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 125000001421 myristyl 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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- IUJLOAKJZQBENM-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-2-methylpropan-2-amine Chemical compound C1=CC=C2SC(SNC(C)(C)C)=NC2=C1 IUJLOAKJZQBENM-UHFFFAOYSA-N 0.000 description 1
- DUNYWFDDGBFCJT-UHFFFAOYSA-N n-benzyl-n-[(dibenzylamino)disulfanyl]-1-phenylmethanamine Chemical compound C=1C=CC=CC=1CN(SSN(CC=1C=CC=CC=1)CC=1C=CC=CC=1)CC1=CC=CC=C1 DUNYWFDDGBFCJT-UHFFFAOYSA-N 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000004957 naphthylene group Chemical group 0.000 description 1
- 125000005071 nonynyl group Chemical group C(#CCCCCCCC)* 0.000 description 1
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 1
- 125000005069 octynyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C#C* 0.000 description 1
- 125000004043 oxo group Chemical group O=* 0.000 description 1
- 125000002958 pentadecyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005981 pentynyl group Chemical group 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000006410 propenylene group Chemical group 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 125000004079 stearyl 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])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
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000005156 substituted alkylene group Chemical group 0.000 description 1
- 125000005346 substituted cycloalkyl group Chemical group 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 229940052367 sulfur,colloidal Drugs 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000005628 tolylene group Chemical group 0.000 description 1
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 1
- 125000002889 tridecyl 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])C([H])([H])C([H])([H])[H] 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-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
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Tires In General (AREA)
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Abstract
Description
前記タイヤ用ゴム組成物は、前記シリカ100質量部に対する前記メルカプト基を有するシランカップリング剤の含有量が1〜20質量部、前記ポリスルフィド化合物の含有量が0.5〜20質量部であることが好ましい。
本発明はまた、前記ゴム組成物を用いて作製した空気入りタイヤに関する。
なお、本発明において、SBRのビニル含量は、赤外吸収スペクトル分析法によって測定できる。
なお、本発明において、SBRのスチレン含量は、H1−NMR測定により算出される。
なお、シリカのN2SAは、ASTM D3037−81に準じてBET法で測定される値である。
該炭化水素基としては、例えば、分岐若しくは非分岐の炭素数1〜30のアルキレン基、分岐若しくは非分岐の炭素数2〜30のアルケニレン基、分岐若しくは非分岐の炭素数2〜30のアルキニレン基、炭素数6〜30のアリーレン基などがあげられる。中でも、分岐若しくは非分岐の炭素数1〜30のアルキレン基が好ましい。
なお、結合単位A、Bの含有量は、結合単位A、Bがシランカップリング剤の末端に位置する場合も含む量である。結合単位A、Bがシランカップリング剤の末端に位置する場合の形態は特に限定されず、結合単位A、Bを示す式(2)、(3)と対応するユニットを形成していればよい。
工程1では、前記ゴム成分、シリカ、メルカプト基を有するシランカップリング剤及びポリスルフィド化合物を混練する。混練方法としては特に限定されず、バンバリーミキサー、オープンロールなどの一般的なゴム工業で使用される混練機を使用できる。なお、ベース練り工程は1回でもよいが、添加剤を分割したり、練り増しするなど、練り回数は特に限定されない。
工程1を行った後、工程1で得られた混練物を冷却した後、更に加硫剤、加硫促進剤の加硫薬品を添加して混練し、未加硫ゴム組成物を得る。
工程3で得られた未加硫ゴム組成物を公知の方法で加硫することにより、本発明のゴム組成物が得られる。工程3の加硫温度は、本発明の効果が良好に得られるという点から、好ましくは120℃以上、より好ましくは140℃以上であり、また、好ましくは200℃以下、より好ましくは180℃以下である。
NR:RSS#3
SBR:日本ゼオン(株)製のNS116R(N−メチルピロリドンにより片末端を変性したS−SBR、スチレン含有率:22質量%、ビニル結合量:65質量%)
シリカ:デグッサ社製のウルトラジルVN3(N2SA:175m2/g)
シランカップリング剤1:EVONIK−DEGUSSA社製のSi69(ビス(3−トリエトキシシリルプロピル)テトラスルフィド)
シランカップリング剤2:Momentive社製のNXT−Z45(結合単位A及び結合単位Bを含む化合物(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3:EVONIK−DEGUSSA社製のSi363
カーボンブラック:三菱化学(株)製のダイアブラックN339(N2SA:96m2/g、DBP吸収量:124ml/100g)
オイル:(株)ジャパンエナジー製のX−140
老化防止剤: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)
ステアリン酸:日油(株)製のステアリン酸「椿」
酸化亜鉛:三井金属鉱業(株)製の亜鉛華1号
ワックス:大内新興化学工業(株)製のサンノックN
ポリスルフィド化合物1:ジチオジカプロラクタム(三新化学社製)
ポリスルフィド化合物2:N−benzyl−N−[(dibenzylamino)disulfanyl]phenylmethanamine(Aldrich社製)
硫黄:鶴見化学工業(株)製の粉末硫黄
加硫促進剤:住友化学(株)製のソクシノールCZ
(株)神戸製鋼所製の1.7Lバンバリーミキサーを用いて、表1中のベース練りの項目に記載の材料を150℃の条件下で5分間混練りし、混練り物を得た(ベース練り工程)。次に、得られた混練り物に、表1中の仕上げ練りの項目に記載の材料を添加し、オープンロールを用いて、80℃の条件下で3分間練り込み、未加硫ゴム組成物を得た(仕上げ練り工程)。
得られた未加硫ゴム組成物を170℃で20分間プレス加硫し、加硫ゴム組成物を得た。
得られた未加硫ゴム組成物について、JIS K 6300に準拠したムーニー粘度を130℃で測定した。比較例1のムーニー粘度(ML1+4)を100とし、下記計算式により指数表示した(ムーニー粘度指数)。指数が大きいほどムーニー粘度が低く、加工性に優れる。
(ムーニー粘度指数)=(比較例1のML1+4)/(各配合のML1+4)×100
ロール加工後のゴムシートの平滑度について、表面及びエッジの平滑度を基準を3として、それぞれ5段階官能評価を実施し、その平均値をゴムシートの平滑度とした。数字が大きい方が優れている。
前記加硫ゴム組成物から所定サイズの試験片を切り出し、(株)上島製作所製の粘弾性スペクトロメーターを用いて、初期歪10%、動歪み2%、周波数10Hzの条件下で、30℃における加硫ゴムシートの損失正接(tanδ)を測定した。比較例1のtanδを100とし、以下の計算式により指数表示した(低燃費性指数1)。指数が大きいほど、低燃費性に優れる。
(低燃費性指数)=(比較例1のtanδ)/(各配合のtanδ)×100
転がり抵抗試験機を用い、試験用タイヤを、リム(15×6JJ)、内圧(230kPa)、荷重(3.43kN)、速度(80km/h)で走行させたときの転がり抵抗を測定し、比較例1を100とした時の指数で表示した(低燃費性指数2)。数値が大きいほど転がり抵抗が小さく、低燃費性に優れることを示す。
Claims (6)
- 加硫薬品の混練工程より前の工程において、前記ポリスルフィド化合物を混練して得られる請求項1記載のタイヤ用ゴム組成物。
- 前記シリカ100質量部に対する前記メルカプト基を有するシランカップリング剤の含有量が1〜20質量部、前記ポリスルフィド化合物の含有量が0.5〜20質量部である請求項1又は2記載のタイヤ用ゴム組成物。
- 前記メルカプト基を有するシランカップリング剤が、下記式(1)で表される化合物、及び/又は下記式(2)で示される結合単位Aと下記式(3)で示される結合単位Bとを含む化合物である請求項1〜3のいずれかに記載のタイヤ用ゴム組成物。
- 前記ゴム成分、前記シリカ、前記メルカプト基を有するシランカップリング剤及び前記ポリスルフィド化合物を混練する工程1と、該工程1で得られた混練物及び加硫薬品を混練する工程2とを含む製造方法により得られる請求項1〜4のいずれかに記載のタイヤ用ゴム組成物。
- 請求項1〜5のいずれかに記載のゴム組成物を用いて作製した空気入りタイヤ。
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JP2000109612A (ja) * | 1998-07-15 | 2000-04-18 | Pirelli Pneumatici Spa | 車両タイヤトレッド用加硫可能なゴム組成物 |
JP2006143929A (ja) * | 2004-11-22 | 2006-06-08 | Sumitomo Rubber Ind Ltd | タイヤトレッド用ゴム組成物および空気入りタイヤ |
JP2007291178A (ja) * | 2006-04-21 | 2007-11-08 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびタイヤ |
JP2012153764A (ja) * | 2011-01-24 | 2012-08-16 | Sumitomo Rubber Ind Ltd | 共重合体、ゴム組成物及び空気入りタイヤ |
JP2015501362A (ja) * | 2011-10-24 | 2015-01-15 | ブリヂストン アメリカズ タイヤ オペレイションズ エルエルシー | シリカ充填ゴム組成物およびその製造方法 |
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JP2000109612A (ja) * | 1998-07-15 | 2000-04-18 | Pirelli Pneumatici Spa | 車両タイヤトレッド用加硫可能なゴム組成物 |
JP2006143929A (ja) * | 2004-11-22 | 2006-06-08 | Sumitomo Rubber Ind Ltd | タイヤトレッド用ゴム組成物および空気入りタイヤ |
JP2007291178A (ja) * | 2006-04-21 | 2007-11-08 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびタイヤ |
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JP2015501362A (ja) * | 2011-10-24 | 2015-01-15 | ブリヂストン アメリカズ タイヤ オペレイションズ エルエルシー | シリカ充填ゴム組成物およびその製造方法 |
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