WO2010104149A1 - 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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- WO2010104149A1 WO2010104149A1 PCT/JP2010/054115 JP2010054115W WO2010104149A1 WO 2010104149 A1 WO2010104149 A1 WO 2010104149A1 JP 2010054115 W JP2010054115 W JP 2010054115W WO 2010104149 A1 WO2010104149 A1 WO 2010104149A1
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- general formula
- carbon atoms
- rubber
- rubber composition
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 116
- 239000005060 rubber Substances 0.000 title claims abstract description 116
- 239000000203 mixture Substances 0.000 title claims abstract description 75
- 150000001875 compounds Chemical class 0.000 claims abstract description 105
- 229920000642 polymer Polymers 0.000 claims abstract description 78
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 61
- 150000001993 dienes Chemical class 0.000 claims abstract description 52
- 239000004636 vulcanized rubber Substances 0.000 claims abstract description 42
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 30
- 239000000945 filler Substances 0.000 claims abstract description 28
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 27
- 229920003244 diene elastomer Polymers 0.000 claims abstract description 22
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 14
- -1 alkali metal amide compounds Chemical class 0.000 claims description 92
- 125000004432 carbon atom Chemical group C* 0.000 claims description 74
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 36
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 28
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- 125000004122 cyclic group Chemical group 0.000 claims description 18
- 125000001931 aliphatic group Chemical group 0.000 claims description 16
- 125000000524 functional group Chemical group 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 14
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- 230000005494 condensation Effects 0.000 claims description 13
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- 125000003700 epoxy group Chemical group 0.000 claims description 11
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 11
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- 125000003118 aryl group Chemical group 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
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- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 10
- 125000001302 tertiary amino group Chemical group 0.000 claims description 10
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- 125000000217 alkyl group Chemical group 0.000 claims description 9
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- 238000007254 oxidation reaction Methods 0.000 claims description 9
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- AWIJRPNMLHPLNC-UHFFFAOYSA-N methanethioic s-acid Chemical compound SC=O AWIJRPNMLHPLNC-UHFFFAOYSA-N 0.000 claims description 8
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- 125000000446 sulfanediyl group Chemical group *S* 0.000 claims description 7
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 6
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 6
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 6
- 125000005843 halogen group Chemical group 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
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- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 claims description 6
- 125000005370 alkoxysilyl group Chemical group 0.000 claims description 5
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- 125000000623 heterocyclic group Chemical group 0.000 claims description 5
- 125000001841 imino group Chemical group [H]N=* 0.000 claims description 5
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 5
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000005062 Polybutadiene Substances 0.000 claims description 4
- 238000010539 anionic addition polymerization reaction Methods 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 claims description 4
- 125000003172 aldehyde group Chemical group 0.000 claims description 3
- 150000007933 aliphatic carboxylic acids Chemical group 0.000 claims description 3
- 125000003368 amide group Chemical group 0.000 claims description 3
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical group O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 3
- NONOKGVFTBWRLD-UHFFFAOYSA-N isocyanatosulfanylimino(oxo)methane Chemical group O=C=NSN=C=O NONOKGVFTBWRLD-UHFFFAOYSA-N 0.000 claims description 3
- 125000000962 organic group Chemical group 0.000 claims description 3
- 150000003141 primary amines Chemical class 0.000 claims description 3
- 125000004076 pyridyl group Chemical group 0.000 claims description 3
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 claims description 3
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 3
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- 125000003396 thiol group Chemical group [H]S* 0.000 claims description 3
- 150000003609 titanium compounds Chemical class 0.000 claims description 3
- 150000001734 carboxylic acid salts Chemical group 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 150000003606 tin compounds Chemical class 0.000 claims description 2
- 241000872198 Serjania polyphylla Species 0.000 claims 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims 1
- 125000004185 ester group Chemical group 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 27
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- 229910052757 nitrogen Inorganic materials 0.000 description 38
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- 238000006116 polymerization reaction Methods 0.000 description 29
- 229910052747 lanthanoid Inorganic materials 0.000 description 24
- 150000002602 lanthanoids Chemical class 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 23
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 239000002685 polymerization catalyst Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 239000000243 solution Substances 0.000 description 15
- 239000000178 monomer Substances 0.000 description 13
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- 239000002879 Lewis base Substances 0.000 description 12
- 239000000446 fuel Substances 0.000 description 12
- 150000007527 lewis bases Chemical class 0.000 description 12
- 229920002554 vinyl polymer Polymers 0.000 description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 10
- 229910052718 tin Inorganic materials 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 125000002947 alkylene group Chemical group 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 9
- BGNGWHSBYQYVRX-UHFFFAOYSA-N 4-(dimethylamino)benzaldehyde Chemical compound CN(C)C1=CC=C(C=O)C=C1 BGNGWHSBYQYVRX-UHFFFAOYSA-N 0.000 description 8
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 8
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 150000007942 carboxylates Chemical group 0.000 description 7
- 230000009477 glass transition Effects 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
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- 239000004606 Fillers/Extenders Substances 0.000 description 6
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 6
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 6
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 235000021317 phosphate Nutrition 0.000 description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 6
- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 229910052779 Neodymium Inorganic materials 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 125000003277 amino group Chemical group 0.000 description 5
- 150000001721 carbon Chemical group 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 4
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 4
- OAOABCKPVCUNKO-UHFFFAOYSA-N 8-methyl Nonanoic acid Chemical compound CC(C)CCCCCCC(O)=O OAOABCKPVCUNKO-UHFFFAOYSA-N 0.000 description 4
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- 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 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
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- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 229940055577 oleyl alcohol Drugs 0.000 description 1
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- PFENPVAFZTUOOM-UHFFFAOYSA-N phenyl 3-oxobutanoate Chemical compound CC(=O)CC(=O)OC1=CC=CC=C1 PFENPVAFZTUOOM-UHFFFAOYSA-N 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- IGALFTFNPPBUDN-UHFFFAOYSA-N phenyl-[2,3,4,5-tetrakis(oxiran-2-ylmethyl)phenyl]methanediamine Chemical compound C=1C(CC2OC2)=C(CC2OC2)C(CC2OC2)=C(CC2OC2)C=1C(N)(N)C1=CC=CC=C1 IGALFTFNPPBUDN-UHFFFAOYSA-N 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- ZILUASOLDUBEBG-UHFFFAOYSA-N propanenitrile;propan-2-one Chemical compound CCC#N.CC(C)=O ZILUASOLDUBEBG-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- XACWJIQLDLUFSR-UHFFFAOYSA-N pyrrolidine-1-carbonyl chloride Chemical compound ClC(=O)N1CCCC1 XACWJIQLDLUFSR-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000010092 rubber production Methods 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 125000005374 siloxide group Chemical group 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- 229940045105 silver iodide Drugs 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 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 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- NBRKLOOSMBRFMH-UHFFFAOYSA-N tert-butyl chloride Chemical compound CC(C)(C)Cl NBRKLOOSMBRFMH-UHFFFAOYSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- KXLQKNLVPVYVKX-UHFFFAOYSA-J tetrabromorhenium Chemical compound Br[Re](Br)(Br)Br KXLQKNLVPVYVKX-UHFFFAOYSA-J 0.000 description 1
- UXMRNSHDSCDMLG-UHFFFAOYSA-J tetrachlororhenium Chemical compound Cl[Re](Cl)(Cl)Cl UXMRNSHDSCDMLG-UHFFFAOYSA-J 0.000 description 1
- KGKLLWHEYDUTBF-UHFFFAOYSA-J tetraiodorhenium Chemical compound I[Re](I)(I)I KGKLLWHEYDUTBF-UHFFFAOYSA-J 0.000 description 1
- 229930192474 thiophene Natural products 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
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- IAQRGUVFOMOMEM-ONEGZZNKSA-N trans-but-2-ene Chemical compound C\C=C\C IAQRGUVFOMOMEM-ONEGZZNKSA-N 0.000 description 1
- ZZUIPNXRUAGCJF-UHFFFAOYSA-N tributoxy(3-trimethylsilylsulfanylpropyl)silane Chemical compound CCCCO[Si](OCCCC)(OCCCC)CCCS[Si](C)(C)C ZZUIPNXRUAGCJF-UHFFFAOYSA-N 0.000 description 1
- IIGVVBYWTLSFRA-UHFFFAOYSA-N tributoxy-[3-(1-methyl-2,4-dihydropyrimidin-3-yl)propyl]silane Chemical compound CCCCO[Si](OCCCC)(OCCCC)CCCN1CC=CN(C)C1 IIGVVBYWTLSFRA-UHFFFAOYSA-N 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- SQBBHCOIQXKPHL-UHFFFAOYSA-N tributylalumane Chemical compound CCCC[Al](CCCC)CCCC SQBBHCOIQXKPHL-UHFFFAOYSA-N 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- YSCVYRUCAPMZFG-UHFFFAOYSA-K trichlorotin Chemical compound Cl[Sn](Cl)Cl YSCVYRUCAPMZFG-UHFFFAOYSA-K 0.000 description 1
- ZIYNWDQDHKSRCE-UHFFFAOYSA-N tricyclohexylalumane Chemical compound C1CCCCC1[Al](C1CCCCC1)C1CCCCC1 ZIYNWDQDHKSRCE-UHFFFAOYSA-N 0.000 description 1
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 description 1
- IWJOAWOCUCJBII-UHFFFAOYSA-N triethoxy(3-trimethylsilylsulfanylpropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCS[Si](C)(C)C IWJOAWOCUCJBII-UHFFFAOYSA-N 0.000 description 1
- FPDNTFVPPHWDGF-UHFFFAOYSA-N triethoxy(sulfonylmethyl)silane Chemical compound CCO[Si](OCC)(OCC)C=S(=O)=O FPDNTFVPPHWDGF-UHFFFAOYSA-N 0.000 description 1
- UDUKMRHNZZLJRB-UHFFFAOYSA-N triethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OCC)(OCC)OCC)CCC2OC21 UDUKMRHNZZLJRB-UHFFFAOYSA-N 0.000 description 1
- RWJUTPORTOUFDY-UHFFFAOYSA-N triethoxy-[2-(oxiran-2-ylmethoxy)ethyl]silane Chemical compound CCO[Si](OCC)(OCC)CCOCC1CO1 RWJUTPORTOUFDY-UHFFFAOYSA-N 0.000 description 1
- INPKLYAAAHFNLQ-UHFFFAOYSA-N triethoxy-[3-(2,2,5,5-tetramethyl-1,2,5-azadisilolidin-1-yl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCN1[Si](C)(C)CC[Si]1(C)C INPKLYAAAHFNLQ-UHFFFAOYSA-N 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
- 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 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
- SPABUJYCCHPCCW-UHFFFAOYSA-N triethoxy-[3-(3-trimethylsilyl-1,3-diazinan-1-yl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCN1CCCN([Si](C)(C)C)C1 SPABUJYCCHPCCW-UHFFFAOYSA-N 0.000 description 1
- IEEIUOKTGZMPFD-UHFFFAOYSA-N triethoxy-[3-(3-trimethylsilylimidazolidin-1-yl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCN1CCN([Si](C)(C)C)C1 IEEIUOKTGZMPFD-UHFFFAOYSA-N 0.000 description 1
- LJSCMFMGPIFSDE-UHFFFAOYSA-N triethoxy-[3-(4-methylpiperazin-1-yl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCN1CCN(C)CC1 LJSCMFMGPIFSDE-UHFFFAOYSA-N 0.000 description 1
- OSRZRVDHMDSFTH-UHFFFAOYSA-N triethoxy-[4-(4-trimethylsilylpiperazin-1-yl)butyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCCN1CCN([Si](C)(C)C)CC1 OSRZRVDHMDSFTH-UHFFFAOYSA-N 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- XSIGLRIVXRKQRA-UHFFFAOYSA-N triethoxysilylmethanethiol Chemical compound CCO[Si](CS)(OCC)OCC XSIGLRIVXRKQRA-UHFFFAOYSA-N 0.000 description 1
- HPEPIADELDNCED-UHFFFAOYSA-N triethoxysilylmethanol Chemical compound CCO[Si](CO)(OCC)OCC HPEPIADELDNCED-UHFFFAOYSA-N 0.000 description 1
- PPLMQFARLJLZAO-UHFFFAOYSA-N triethyl(iodo)silane Chemical compound CC[Si](I)(CC)CC PPLMQFARLJLZAO-UHFFFAOYSA-N 0.000 description 1
- ORYGRKHDLWYTKX-UHFFFAOYSA-N trihexylalumane Chemical compound CCCCCC[Al](CCCCCC)CCCCCC ORYGRKHDLWYTKX-UHFFFAOYSA-N 0.000 description 1
- GCZKMPJFYKFENV-UHFFFAOYSA-K triiodogold Chemical compound I[Au](I)I GCZKMPJFYKFENV-UHFFFAOYSA-K 0.000 description 1
- PMXKHNVLACXGAZ-UHFFFAOYSA-N trimethoxy(3-trimethylsilylsulfanylpropyl)silane Chemical compound CO[Si](OC)(OC)CCCS[Si](C)(C)C PMXKHNVLACXGAZ-UHFFFAOYSA-N 0.000 description 1
- SQSDQKFNZWSCJT-UHFFFAOYSA-N trimethoxy(sulfonylmethyl)silane Chemical compound CO[Si](OC)(OC)C=S(=O)=O SQSDQKFNZWSCJT-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
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- ZNXDCSVNCSSUNB-UHFFFAOYSA-N trimethoxy-[2-(oxiran-2-ylmethoxy)ethyl]silane Chemical compound CO[Si](OC)(OC)CCOCC1CO1 ZNXDCSVNCSSUNB-UHFFFAOYSA-N 0.000 description 1
- UXDUWXHXCWUEJC-UHFFFAOYSA-N trimethoxy-[3-(2,2,5,5-tetramethyl-1,2,5-azadisilolidin-1-yl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCN1[Si](C)(C)CC[Si]1(C)C UXDUWXHXCWUEJC-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
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- QJOOZNCPHALTKK-UHFFFAOYSA-N trimethoxysilylmethanethiol Chemical compound CO[Si](CS)(OC)OC QJOOZNCPHALTKK-UHFFFAOYSA-N 0.000 description 1
- SPHALHRGAQVBKI-UHFFFAOYSA-N trimethoxysilylmethanol Chemical compound CO[Si](CO)(OC)OC SPHALHRGAQVBKI-UHFFFAOYSA-N 0.000 description 1
- LQBHRPIAMBRGHZ-UHFFFAOYSA-N trimethyl(3-tripropoxysilylpropylsulfanyl)silane Chemical compound CCCO[Si](OCCC)(OCCC)CCCS[Si](C)(C)C LQBHRPIAMBRGHZ-UHFFFAOYSA-N 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- LFXVBWRMVZPLFK-UHFFFAOYSA-N trioctylalumane Chemical compound CCCCCCCC[Al](CCCCCCCC)CCCCCCCC LFXVBWRMVZPLFK-UHFFFAOYSA-N 0.000 description 1
- PHYFQTYBJUILEZ-IUPFWZBJSA-N triolein Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CCCCCCCC)COC(=O)CCCCCCC\C=C/CCCCCCCC PHYFQTYBJUILEZ-IUPFWZBJSA-N 0.000 description 1
- JOJQVUCWSDRWJE-UHFFFAOYSA-N tripentylalumane Chemical compound CCCCC[Al](CCCCC)CCCCC JOJQVUCWSDRWJE-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- CNWZYDSEVLFSMS-UHFFFAOYSA-N tripropylalumane Chemical compound CCC[Al](CCC)CCC CNWZYDSEVLFSMS-UHFFFAOYSA-N 0.000 description 1
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229940102001 zinc bromide Drugs 0.000 description 1
- 229960001939 zinc chloride Drugs 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- 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
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Definitions
- the present invention relates to a rubber composition capable of preparing a vulcanized rubber suitable for producing a pneumatic tire or the like excellent in wear resistance, fracture strength, rolling resistance, wet skid resistance, and the like, and wear resistance.
- the present invention relates to a pneumatic tire excellent in breaking strength, rolling resistance, wet skid resistance, and the like.
- the concept of “energy loss at low frequency of vulcanized rubber” serves as an evaluation index of vulcanized rubber with respect to fuel efficiency under actual use conditions of the tire.
- the concept of “energy loss at high frequency of vulcanized rubber” serves as an evaluation index of vulcanized rubber with respect to running stability under actual use conditions of the tire.
- the frequency is converted into temperature (under the condition that the frequency is lowered and the temperature is lowered by that amount), and by measuring “tan ⁇ at 0 ° C.”, it is evaluated as a laboratory index of vulcanized rubber related to running stability. .
- the tire has better running stability.
- the demand for lower fuel consumption (reducing rolling resistance) and the demand for improved running stability (increased frictional resistance) are in a trade-off relationship, making it difficult to achieve both of these properties.
- the demand for lower fuel consumption there is also a demand for weight reduction of tires in addition to reduction of rolling resistance. Since weight reduction of tires inevitably accompanies thinning of the tread portion, a rubber material with improved wear characteristics and breaking strength is desired to avoid shortening the tire life.
- a filler is added to the rubber material.
- the filler include carbon black used for the purpose of improving wear resistance and reinforcing, and silica used for the purpose of stability at high speed and reduction in fuel consumption.
- carbon black used for the purpose of improving wear resistance and reinforcing
- silica used for the purpose of stability at high speed and reduction in fuel consumption.
- the amount of carbon black is inevitably reduced, so that there is a problem that the wear resistance and fracture strength of the tire are lowered. Further, the dispersibility of silica is poor, and the workability at the time of kneading is also a big problem in actually manufacturing a tire.
- a conjugated diene-based (co) polymer rubber having an amino group and an alkoxysilyl group in a polymer chain, and having a weight average molecular weight of a predetermined value and A rubber composition containing a conjugated diene-based (co) polymer rubber having a weight average molecular weight of a predetermined value as a main component is disclosed (for example, see Patent Document 1).
- a rubber composition containing a rubber component containing a diene rubber having a predetermined functional group, silica, and an aliphatic component is disclosed (for example, see Patent Document 2).
- a rubber component containing a modified conjugated diene polymer obtained by modifying the active terminal of a conjugated diene polymer having a cis-1,4-bond content of 75 mol% or more with at least a hydrocarbyloxysilane compound, silica are disclosed (for example, refer to Patent Document 3). Also disclosed is a pneumatic tire using a rubber composition containing a rubber component including the modified conjugated diene polymer and styrene-butadiene copolymer rubber (see, for example, Patent Document 4).
- An object of the present invention is to provide a rubber composition capable of preparing a vulcanized rubber suitable for producing a tire containing a tire.
- Another object of the present invention is to provide a pneumatic tire excellent in wear resistance, fracture strength, rolling resistance, wet skid resistance, and the like.
- the active end of the diene polymer is first modified with at least an alkoxysilane compound, and the filler (B) is used in an amount of 2 to 100 parts by weight (100 parts by weight of the rubber component (A)).
- the filler (B) contains (b2) silica
- the filler (B2) further contains 5 to 20 parts by mass of a silane coupling agent with respect to 100 parts by mass of silica.
- the (a1) modified styrene-butadiene copolymer comprises at least one compound selected from the group consisting of organic alkali metals, organic alkaline earth metals, alkali metal amide compounds, and alkaline earth metal amide compounds.
- organic alkali metals organic alkaline earth metals
- alkali metal amide compounds alkali metal amide compounds
- alkaline earth metal amide compounds alkaline earth metal amide compounds
- the (a1) modified styrene-butadiene copolymer has an epoxy group, a hydroxyl group, a primary amino group, a secondary amino group, a tertiary amino group, a heterocyclic ring at the terminal of the styrene-butadiene copolymer.
- the (a2) modified conjugated diene polymer is secondarily modified in the presence of a condensation accelerator after the active terminal of the conjugated diene polymer is first modified with the alkoxysilane compound.
- the alkoxysilane compound is a compound represented by the following general formula (1), a compound represented by the following general formula (2), a compound represented by the following general formula (3), and these compounds:
- a 1 is (thio) epoxy group, (thio) isocyanate group, (thio) ketone group, (thio) aldehyde group, imino group, cyano group, amide group, isocyanuric acid trihydrocarbyl ester
- R 1 represents a single bond or a divalent inert hydrocarbon group
- R 2 and R 3 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms.
- n represents an integer of 0 to 2.
- R 2 have more than one plurality of R 2 may be the same or different.
- OR 3 there is a plurality, the plurality of OR 3 may be the same or different.
- numerator of the compound represented by the said General formula (1) an active proton and onium salt are not contained.
- a 2 is a monovalent group having at least one functional group selected from the group consisting of a cyclic or acyclic tertiary amino group, a pyridyl group, a sulfide group, and a multisulfide group.
- R 4 represents a single bond or a divalent inert hydrocarbon group
- R 5 and R 6 are each independently a monovalent aliphatic hydrocarbon group or carbon number of 1 to 20 carbon atoms.
- the plurality of R 5 s may be the same or different.
- the OR 6 there is more than one a plurality of OR 6 may be the same or different.
- numerator of the compound represented by the said General formula (2) an active proton and onium salt are not contained.
- a 3 is a hydroxyl group, a thiol group, a primary amino group, an onium salt of a primary amine, a cyclic or acyclic secondary amino group, an onium salt of a cyclic or acyclic secondary amine, A monovalent group having at least one functional group selected from the group consisting of an onium salt of a cyclic or acyclic tertiary amine, a group having an aryl Sn bond or an arylalkyl Sn bond, a sulfonyl group, and a sulfinyl group , R 7 represents a single bond or a divalent inert hydrocarbon group, and R 8 and R 9 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms or 6 to 6 carbon atoms.
- R 8 have more than one plurality of R 8 is may be the same or different.
- OR 9 have more than one plurality of OR 9 may be the same or different.
- the alkoxysilane compound is at least one selected from the group consisting of 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, and partial condensates of these compounds. 7].
- the condensation accelerator is a carboxylate of 3 to 20 carbon atoms of tin of oxidation number 2 represented by the following general formula (10), tin of oxidation number 4 represented by the following general formula (11)
- R 17 independently represents an organic group having 2 to 19 carbon atoms
- a 4 represents an aliphatic carboxylic acid residue having 2 to 30 carbon atoms, a 1,3-dicarbonyl-containing group having 5 to 30 carbon atoms, or a hydrocarbyloxy group having 1 to 30 carbon atoms.
- a 5 x TiB 2 (4-x) (12) (In the general formula (12), A 5 represents a siloxy group that is trisubstituted in total with a group selected from the group consisting of a hydrocarbyloxy group having 1 to 30 carbon atoms and an alkyl group having 1 to 30 carbon atoms. , B 2 represents a 1,3-dicarbonyl-containing group having 5 to 30 carbon atoms, x is, if the .A 5 represents an integer of 2 or 4 is more than one, the plurality of a 5 was the same even, in the case where good .B 2 be different there is a plurality, the plurality of B 2 can be the same or different)
- a pneumatic tire comprising the rubber composition according to any one of [1] to [11].
- the rubber composition of the present invention has an effect that a vulcanized rubber suitable for producing a pneumatic tire or the like excellent in abrasion resistance, fracture strength, rolling resistance, wet skid resistance and the like can be prepared. It is what you play.
- the pneumatic tire of the present invention has an effect of being excellent in wear resistance, fracture strength, rolling resistance, wet skid resistance and the like.
- the rubber composition of the present invention contains (A) a rubber component and (B) a filler. The details will be described below.
- the rubber component contains a diene rubber.
- the diene rubber includes (a1) a modified styrene-butadiene copolymer (hereinafter also referred to as “(a1) copolymer”) and (a2) a modified conjugated diene polymer (hereinafter referred to as “(a2) heavy polymer”. Also referred to as "union”).
- the diene rubber is preferably essentially composed of (a1) a copolymer and (a2) a polymer.
- the proportion of the (a1) copolymer contained in the diene rubber is 20% by mass or more, preferably 20 to 95 when the total of (a1) copolymer and (a2) polymer is 100% by mass. % By mass, more preferably 25 to 90% by mass. (A1) When the content of the copolymer is less than 20% by mass, the vulcanized rubber may be inferior in breaking strength, wear resistance, and rolling resistance.
- the proportion of the polymer (a2) contained in the diene rubber is 5% by mass or more, preferably 5 to 5%, when the total of (a1) copolymer and (a2) polymer is 100% by mass. 80% by mass, more preferably 10 to 75% by mass. (A2) If the content of the polymer is less than 5% by mass, the vulcanized rubber may be inferior in breaking strength, wear resistance, and rolling resistance.
- the diene rubber is preferably essentially composed of a copolymer (a1) and a polymer (a2). Furthermore, the rubber component (A) is essentially a copolymer (a1). And (a2) a polymer.
- the (a1) copolymer is a styrene-butadiene copolymer whose end is modified (modified SBR).
- the proportion of structural units derived from 1,3-butadiene contained in the copolymer is usually 55 to 99% by mass, preferably 55 to 95% by mass, and more preferably 58 to 90% in all structural units. % By mass.
- the vinyl bond content in the structural unit derived from 1,3-butadiene is usually 70% or less, preferably 15 to 70%, more preferably 18 to 67%. If the vinyl bond content is more than 70%, the vulcanized rubber may be inferior in breaking strength, wear resistance, and rolling resistance.
- the vinyl bond content in the structural unit derived from 1,3-butadiene can be adjusted by adding at least one of an ether compound and a tertiary amine compound during the polymerization reaction.
- the ether compound examples include diethyl ether, di-n-butyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, propylene glycol dibutyl ether, tetrahydrofuran, 2,2- Bis (tetrahydrofurfuryl) propane, bistetrahydrofurfuryl formal, methyl ether of tetrahydrofurfuryl alcohol, ethyl ether of tetrahydrofurfuryl alcohol, butyl ether of tetrahydrofurfuryl alcohol, ⁇ -methoxytetrahydrofuran, dimethoxybenzene, dimethoxyethane, etc. be able to.
- tertiary amine compound examples include triethylamine, N, N, N ′, N′-tetramethylethylenediamine, dipiperidinoethane, methyl ether of N, N-diethylethanolamine, N, N-diethyl.
- examples include ethanolamine ethyl ether and N, N-diethylethanolamine butyl ether.
- the proportion of structural units derived from styrene contained in the copolymer is usually 45% by mass or less, preferably 5 to 42% by mass in the total structural units. If the proportion of structural units derived from styrene exceeds 45% by mass, the low-temperature characteristics, wet skid resistance, and wear resistance may be deteriorated.
- the copolymer further contains a structural unit derived from a polyfunctional monomer, if necessary, in addition to a structural unit derived from 1,3-butadiene and a structural unit derived from styrene. May be.
- Specific examples of the polyfunctional monomer include divinylbenzene and diisopropenylbenzene.
- the ratio of the structural unit derived from the polyfunctional monomer contained in (a1) copolymer is less than 10 mass% in all the structural units, and it is still more preferable that it is 5 mass% or less. .
- the method for preparing the copolymer is not particularly limited, and is selected from the group consisting of, for example, an organic alkali metal, an organic alkaline earth metal, an alkali metal amide compound, and an alkaline earth metal amide compound. It is preferable to prepare butadiene and styrene by anionic polymerization in a hydrocarbon solvent using at least one kind of compound as an initiator, and then reacting the end of the active polymer with a modifier. According to this preparation method, the (a1) copolymer can be easily prepared in a high yield by one reaction.
- the reaction conditions for anionic polymerization are not particularly limited.
- the monomer component may be added all at once or dividedly.
- conditions such as reaction temperature and reaction time can be appropriately selected according to the type and amount of the monomer component.
- hydrocarbon solvent is not particularly limited.
- specific examples of the hydrocarbon solvent include butane, pentane, hexane, heptane, octane, methylcyclopentane, cyclohexane, benzene, toluene, xylene and the like. Of these, butane, pentane, cyclohexane, hexane, and heptane are preferable.
- organic alkali metal and organic alkaline earth metal used as the initiator include alkyllithium such as n-butyllithium, sec-butyllithium, and tert-butyllithium, alkylenedilithium such as 1,4-dilithiobutane, Phenyl lithium, stilbene lithium, lithium naphthalene, sodium naphthalene, potassium naphthalene, n-butylmagnesium, n-hexylmagnesium, ethoxycalcium, calcium stearate, tert-butoxystrontium, ethoxybarium, isopropoxybarium, ethyl mercaptobarium, tert-butoxy Examples thereof include barium, phenoxybarium, diethylaminobarium, and barium stearate.
- alkyllithium such as n-butyllithium, sec-butyllithium, and tert-butyllithium
- alkali metal amide compounds and alkaline earth metal amide compounds used as initiators include those obtained by reacting the above organic alkali metal or organic alkaline earth metal with a secondary amine compound or a tertiary amine compound. Can be mentioned. In this case, it is preferable to use alkyl lithium as the organic alkali metal, and it is more preferable to use n-butyl lithium, sec-butyl lithium, or tert-butyl lithium.
- secondary amine compound examples include dimethylamine, diethylamine, dipropylamine, di-n-butylamine, di-sec-butylamine, dipentylamine, dihexylamine, di-n-octylamine, di- (2-ethylhexyl).
- tertiary amine compound examples include N, N-dimethyl-o-toluidine, N, N-dimethyl-p-toluidine, N, N-dimethyl-m-toluidine, ⁇ -picoline, ⁇ -picoline, ⁇ -picoline, benzyldimethylamine, benzyldiethylamine, benzyldipropylamine, benzyldibutylamine, ( ⁇ -methylbenzyl) dimethylamine, (m-methylbenzyl) dimethylamine, (p-methylbenzyl) dimethylamine, N, N -Tetramethylene-o-toluidine, N, N-heptamethylene-o-toluidine, N, N-hexamethylene-o-toluidine, N, N-trimethylenebenzylamine, N, N-tetramethylenebenzylamine, N, N-hexamethylenebenzylamine, N, N-tetramethylene (
- the reaction with the modifying agent is usually performed under a temperature condition of 0 to 120 ° C.
- the modification reaction may be performed under a constant temperature condition, or the modification reaction may be performed under an elevated temperature condition.
- the time for the denaturation reaction is usually 5 minutes or more, preferably 10 minutes or more.
- the modifying agent include the following compound (group). That is, polyglycidyl ethers of polyhydric alcohols such as ethylene glycol diglycidyl ether, glycerin triglycidyl ether, trimethylolethane triglycidyl ether, trimethylolpropane triglycidyl ether; two or more phenol groups such as diglycidylated bisphenol A Polyglycidyl ethers of aromatic compounds; polyepoxy compounds such as 1,4-diglycidylbenzene, 1,3,5-triglycidylbenzene, polyepoxidized liquid polybutadiene; 4,4′-diglycidyl-diphenylmethylamine, 4, Epoxy group-containing tertiary amines such as 4′-diglycidyl-dibenzylmethylamine; diglycidylaniline, N, N′-diglycidyl-4-glycidyloxyaniline, diglycidylortho
- Amino group-containing acid chlorides such as bis- (1-methylpropyl) carbamic acid chloride, 4-morpholine carbonyl chloride, 1-pyrrolidine carbonyl chloride, N, N-dimethylcarbamic acid chloride, N, N-diethylcarbamic acid chloride; 1 , 3-bis- (glycidyloxypropyl) -tetramethyldisiloxane, (3-glycidyloxypropyl) -pentamethyldisiloxane and other epoxy group-containing silane compounds; 3-dimethylaminopropyl (triethoxy) silane, 3-dimethylamino Propyl (trimethoxy) silane, 3-diethylaminopropyl (triethoxy) silane, 3-diethylaminopropyl (trimethoxy) silane, 2-dimethylaminoethyl (triethoxy) silane, 2-dimethylaminoethyl (trimethoxy)
- N N-bis (trimethylsilyl) aminopropylmethyldimethoxysilane, N, N-bis (trimethylsilyl) aminopropyltrimethoxysilane, N, N-bis (trimethylsilyl) aminopropyltriethoxysilane, N, N-bis (trimethylsilyl) Aminopropylmethyldiethoxysilane, N, N-bis (trimethylsilyl) aminoethyltrimethoxysilane, N, N-bis (trimethylsilyl) aminoethyltriethoxysilane, N, N-bis (trimethylsilyl) aminoethylmethyldimethoxysilane, N , N-bis (trimethylsilyl) aminoethylmethyldiethoxysilane, N, N-bis (triethylsilyl) aminopropylmethyldimethoxysilane, N, N-bis (triethylsilyl) aminopropyltrimethoxy Lan, N
- N, N ′, N′-tris (trimethylsilyl) -N- (2-aminoethyl) -3-aminopropyltriethoxysilane, N, N ′, N′-tris (trimethylsilyl) -N- (2-aminoethyl) ) -3-aminopropylmethyldiethoxysilane, N, N ′, N′-tris (trimethylsilyl) -N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N, N ′, N′-tris (Trimethylsilyl) -N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, 1- (3-triethoxysilylpropyl) -2,2,5,5-tetramethyl-1-aza-2,5 -Disilacyclopentane, 1- (3-trimethoxysilylpropy
- N-substituted aziridine compounds such as ethyleneimine and propyleneimine; alkoxysilanes such as methyltriethoxysilane; 4-N, N-dimethylaminobenzophenone, 4-N, N-di-t-butylaminobenzophenone, 4-N, N-diphenylaminobenzophenone, 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone, 4,4′-bis (diphenylamino) benzophenone, N, N, N ′, N ′ A (thio) benzophenone compound having an amino group and / or a substituted amino group such as bis- (tetraethylamino) benzophenone; 4-N, N-dimethylaminobenzaldehyde, 4-N, N-diphenylaminobenzaldehyde, 4-N, Amino such as N-divinyla
- N, N-bis- (2,3-epoxypropoxy) -aniline, 4,4-methylene-bis- (N, N-glycidylaniline), tris- (2,3-epoxypropyl) -1,3,5 -Triazine-2,4,6-triones N, N-diethylacetamide, N-methylmaleimide, N, N-diethylurea, 1,3-dimethylethyleneurea, 1,3-divinylethyleneurea, 1,3 -Diethyl-2-imidazolidinone, 1-methyl-3-ethyl-2-imidazolidinone, 4-N, N-dimethylaminoacetophene, 4-N, N-diethylaminoacetophenone, 1,3-bis (diphenyl) And amino) -2-propanone and 1,7-bis (methylethylamino) -4-heptanone.
- a copolymer can be obtained by modifying the terminal of the styrene-butadiene copolymer using the above modifier.
- the obtained (a1) copolymer is composed of an epoxy group, a hydroxyl group, a primary amino group, a secondary amino group, a tertiary amino group, a heterocyclic ring, and an alkoxysilyl group at the terminal of the styrene-butadiene copolymer. It is preferable that at least one functional group selected from the group is introduced.
- the polystyrene-reduced weight average molecular weight (Mw) of the copolymer by gel permeation column chromatography is preferably 150,000 to 2,000,000, preferably 150,000 to 1,500,000. More preferably, it is more preferably 160,000 to 1,000,000.
- Mw weight average molecular weight
- the vulcanized rubber may be inferior in tensile strength, wear resistance, and rolling resistance. On the other hand, if it exceeds 2,000,000, the processability of the rubber composition is inferior, the dispersibility of the filler (B) during kneading is deteriorated, the tensile strength, abrasion resistance, Rolling resistance and wet skid resistance may deteriorate.
- the glass transition temperature (Tg) of the copolymer (a1) measured in accordance with ASTM D3418 is usually ⁇ 5 ° C. or lower, preferably ⁇ 10 ° C. or lower, and more preferably ⁇ 10 to ⁇ 90 ° C. (A1)
- the glass transition temperature (Tg) of the copolymer (a1) can be adjusted by adjusting the vinyl bond content of structural units derived from 1,3-butadiene and the content ratio of structural units derived from styrene. can do.
- the Mooney viscosity (ML 1 + 4 , 100 ° C.) of the copolymer is preferably 20 to 200, more preferably 30 to 100.
- A1 When the Mooney viscosity (ML 1 + 4 , 100 ° C.) of the copolymer is less than 20, the tensile strength, wear resistance, and rolling resistance of the vulcanized rubber may be deteriorated. On the other hand, when the Mooney viscosity (ML 1 + 4 , 100 ° C.) of the (a1) copolymer exceeds 200, the processability of the rubber composition may be inferior.
- the Mooney viscosity (ML 1 + 4 , 100 ° C.) exceeds 200, the Mooney viscosity can be lowered by adding an extending oil or a liquid polymer having a weight average molecular weight (Mw) of less than 150,000.
- Mw weight average molecular weight
- the addition of extender oil is preferable because the (B) filler can be uniformly finely dispersed, and processability and vulcanizability, in particular, wear resistance can be improved.
- extension oils include mineral oils and softeners.
- the viscosity specific gravity constant (hereinafter also referred to as “VGC”) of the extending oil is preferably 0.790 to 1.100, more preferably 0.790 to 1.049, and 0 It is particularly preferably from 790 to 0.999, most preferably from 0.790 to 0.949.
- the amount added is usually 10 to 100 parts by mass, preferably 15 to 90 parts by mass with respect to 100 parts by mass of the (a1) copolymer. If the amount of the extender oil added is less than 10 parts by mass, the effect of adding the extender oil may not be obtained. On the other hand, if it exceeds 100 parts by mass, the (a1) copolymer may be remarkably softened and the processability of the rubber composition may deteriorate.
- the polymer is a polymer in which the active terminal of a conjugated diene polymer having a cis-1,4-bond content of 80% or more is first modified with an alkoxysilane compound.
- the proportion of the polymer (a2) contained in the diene rubber is 5% by mass or more, preferably 5 to 80% by mass, more preferably 10 to 75% by mass with respect to the whole diene rubber.
- the proportion of the polymer (a2) contained in the diene rubber is less than 5% by mass, the rolling resistance and wet skid resistance of the resulting vulcanized rubber are lowered.
- the Mooney viscosity (ML 1 + 4 , 100 ° C.) of the polymer is preferably 10 to 150, more preferably 15 to 70. If the Mooney viscosity is less than 10, the physical properties of the vulcanized rubber including the tensile strength tend to decrease. On the other hand, when the Mooney viscosity is more than 150, the processability is lowered and it tends to be difficult to knead with the filler (B).
- the polymer is obtained by, for example, subjecting a conjugated diene compound to a polymerization reaction with another monomer as required in the presence of a polymerization catalyst to obtain a conjugated diene polymer.
- the active terminal can be prepared by primary modification with an alkoxysilane compound.
- the conjugated diene polymer used for preparing the polymer has a cis-1,4-bond content of 80% or more, preferably 82% or more in the structural unit derived from the conjugated diene compound. More preferably, it is 84% or more.
- the polymerization reaction method for preparing the conjugated diene polymer is not particularly limited, and a conventionally known method such as a solution polymerization method, a gas phase polymerization method, or a bulk polymerization method can be used. Of these, the solution polymerization method is preferable. When polymerization is performed by a solution polymerization method, it is preferable to use an organic solvent inert to the reaction as the polymerization solvent.
- organic solvent used as the polymerization solvent include aliphatic, alicyclic and aromatic hydrocarbon solvents. More specifically, propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, cyclohexane, propene, 1-butene, isobutene, trans-2-butene, cis-2-butene, 1-pentene, Examples thereof include 2-pentene, 1-hexene, 2-hexene, benzene, toluene, xylene, and ethylbenzene. In addition, these organic solvents can be used individually by 1 type or in combination of 2 or more types.
- the reaction temperature during the polymerization is preferably -80 to 150 ° C, more preferably -20 to 120 ° C.
- the pressure during the polymerization is preferably a pressure sufficient to keep the monomer (conjugated diene compound) substantially in a liquid phase.
- the polymerization is preferably carried out under higher pressure conditions although it depends on the kind of the monomer and solvent, the reaction temperature, and the like. Such a high pressure can be adjusted by an operation such as pressurizing the reaction vessel with an inert gas.
- conjugated diene compound examples include 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-phenyl-1,3-butadiene, and 1,3-hexadiene. Etc. Of these, 1,3-butadiene is preferable (that is, (a2) the polymer is preferably modified polybutadiene).
- these conjugated diene compounds can be used individually by 1 type or in combination of 2 or more types.
- the conjugated diene polymer may have a structure derived from a monomer other than the conjugated diene compound.
- the conjugated diene compound is preferably used in an amount of 80 mol% or more based on the total monomers.
- a polymerization catalyst As a polymerization catalyst, what was described in the international publication 03/046020 pamphlet can be used conveniently. More specifically, a polymerization catalyst mainly comprising the following components (e) to (g) is preferable. By using such a polymerization catalyst, a conjugated diene polymer having a narrow molecular weight distribution and a cis-1,4-bond content of 80% or more can be prepared.
- this polymerization catalyst is less expensive than conventionally used metallocene catalysts, and it is not necessary to perform a polymerization reaction at an extremely low temperature. For this reason, the polymerization reaction using this polymerization catalyst is simple in operation and useful as an industrial production process.
- the component (e) is a lanthanoid element-containing compound containing at least one of lanthanoid elements (rare earth elements corresponding to atomic numbers 57 to 71 in the periodic table), or a reaction obtained by reacting this lanthanoid element-containing compound with a Lewis base.
- lanthanoid elements include neodymium, praseodymium, cerium, lanthanum, gadolinium, samarium and the like. Of these, neodymium is preferable.
- these lanthanoid elements can be used individually by 1 type or in combination of 2 or more types.
- lanthanoid element-containing compound examples include lanthanoid element carboxylates, alkoxides, ⁇ -diketone complexes, phosphates, phosphites, and the like.
- lanthanoid element carboxylates or phosphates are preferable, and lanthanoid element carboxylates are more preferable.
- carboxylate of the lanthanoid element examples include compounds represented by the general formula (5) :( R 13 —CO 2 ) 3 M (in the general formula (5), M is: R represents a lanthanoid element, and R 13 represents a hydrocarbon group having 1 to 20 carbon atoms (preferably, saturated or unsaturated, linear, branched or cyclic).
- the carboxyl group is bonded to a primary, secondary, or tertiary carbon atom.
- carboxyl group examples include octanoic acid, 2-ethylhexanoic acid, oleic acid, stearic acid, benzoic acid, naphthenic acid, trade name “Versatic acid” (manufactured by Shell Chemical Co., Ltd.) (carbon atom is a tertiary carbon atom) And a salt such as a carboxylic acid bonded to the salt.
- octanoic acid 2-ethylhexanoic acid
- oleic acid oleic acid
- stearic acid benzoic acid
- naphthenic acid trade name “Versatic acid” (manufactured by Shell Chemical Co., Ltd.) (carbon atom is a tertiary carbon atom)
- a salt such as a carboxylic acid bonded to the salt.
- salts of 2-ethylhexanoic acid, naphthenic acid, and versatic acid are preferable.
- alkoxides of lanthanoid elements include compounds represented by general formula (6) :( R 14 O) 3 M (provided that, in general formula (6), M represents a lanthanoid element).
- R 14 represents a hydrocarbon group having 1 to 20 carbon atoms (preferably a saturated or unsaturated, linear, branched or cyclic group).
- the alkoxy group is bonded to a primary, secondary, or tertiary carbon atom.
- Specific examples of the alkoxy group include 2-ethyl-hexylalkoxy group, oleylalkoxy group, stearylalkoxy group, phenoxy group, benzylalkoxy group and the like. Of these, a 2-ethyl-hexylalkoxy group and a benzylalkoxy group are preferable.
- ⁇ -diketone complex portion of the ⁇ -diketone complex of the lanthanoid element examples include an acetylacetone complex, a benzoylacetone complex, a propionitrileacetone complex, a valerylacetone complex, and an ethylacetylacetone complex. Of these, acetylacetone complex and ethylacetylacetone complex are preferable.
- phosphate portion of the lanthanoid element phosphate and the phosphite portion of the lanthanoid element phosphite include bis (2-ethylhexyl phosphate) and bis (1-methylheptyl phosphate).
- Bis (p-nonylphenyl) phosphate bis (polyethylene glycol-p-nonylphenyl) phosphate, (1-methylheptyl) phosphate (2-ethylhexyl), phosphate (2-ethylhexyl) (p-nonylphenyl) ), 2-ethylhexylphosphonic acid mono-2-ethylhexyl, 2-ethylhexylphosphonic acid mono-p-nonylphenyl, bis (2-ethylhexyl) phosphinic acid, bis (1-methylheptyl) phosphinic acid, bis (p-nonylphenyl) ) Phosphinic acid, (1-methylheptyl) (2-ethylhexyl) phosphinic acid, (2- Ethylhexyl) (p-nonylphenyl) salts such as phosphinic acid.
- bis (2-ethylhexyl) phosphate bis (1-methylheptyl) phosphate, mono-2-ethylhexyl 2-ethylhexylphosphonate, and bis (2-ethylhexyl) phosphinic acid are preferred.
- the lanthanoid element-containing compound is more preferably a neodymium phosphate or a neodymium carboxylate, and a carboxylate such as neodymium 2-ethylhexanoate or neodymium versatate. Is particularly preferred.
- a reaction product is produced by mixing a lanthanoid element-containing compound and a Lewis base, or by reacting a lanthanoid element-containing compound with a Lewis base. It is also preferable to use a product.
- the use amount of the Lewis base is preferably 30 mol or less, more preferably 1 to 10 mol, per mol of the lanthanoid element.
- Lewis base examples include acetylacetone, tetrahydrofuran, pyridine, N, N-dimethylformamide, thiophene, diphenyl ether, triethylamine, an organic phosphorus compound, a monovalent or divalent alcohol, and the like.
- the (e) component described so far can be used individually by 1 type or in combination of 2 or more types.
- the component (f) is alumoxane and / or general formula (7): an organoaluminum compound represented by AlR 12 R 13 R 14 (however, in general formula (7), R 12 and R 13 are Independently, it represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and R 14 represents a hydrocarbon group having 1 to 10 carbon atoms).
- Alumoxane (also referred to as aluminoxane) is a compound whose structure is represented by the following general formula (8) or (9).
- R 15 represents a hydrocarbon group having 1 to 20 carbon atoms. Moreover, both n in the general formula (8) and m in the general formula (9) represent an integer of 2 or more.
- specific examples of the hydrocarbon group having 1 to 20 carbon atoms represented by R 15 include a methyl group, an ethyl group, a propyl group, a butyl group, an isobutyl group, t- A butyl group, a hexyl group, an isohexyl group, an octyl group, an isooctyl group, etc. can be mentioned.
- n in the general formula (8) and m in the general formula (9) are each preferably an integer of 4 to 100.
- alumoxane examples include methylalumoxane (MAO), ethylalumoxane, n-propylalumoxane, n-butylalumoxane, isobutylalumoxane, t-butylalumoxane, hexylalumoxane, isohexylalumoxane and the like.
- MAO methylalumoxane
- ethylalumoxane ethylalumoxane
- n-propylalumoxane n-butylalumoxane
- isobutylalumoxane isobutylalumoxane
- t-butylalumoxane hexylalumoxane
- isohexylalumoxane and the like examples include methylalumoxane (MAO), ethylalumoxane, n-propy
- trialkylaluminum or dialkylaluminum monochloride is added to an organic solvent such as benzene, toluene, xylene, and water, water vapor, water vapor-containing nitrogen gas, or copper sulfate pentahydrate or aluminum sulfate 16-hydrate. It can be prepared by adding a salt having crystal water and reacting. These alumoxanes can be used singly or in combination of two or more.
- organoaluminum compound represented by the general formula (7) examples include trimethylaluminum, triethylaluminum, tri-n-propylaluminum, triisopropylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-t.
- triethylaluminum, triisobutylaluminum, diethylaluminum hydride, diisobutylaluminum hydride and the like are preferable.
- These organoaluminum compounds can be used singly or in combination of two or more.
- the component (g) is a halogen-containing compound containing at least one halogen atom in its molecular structure.
- Specific examples of the component (g) include a reaction product of a metal halide and a Lewis base, diethylaluminum chloride, silicon tetrachloride, trimethylchlorosilane, methyldichlorosilane, dimethyldichlorosilane, methyltrichlorosilane, ethylaluminum dichloride, ethylaluminum.
- metal halides include beryllium chloride, beryllium bromide, beryllium iodide, magnesium chloride, magnesium bromide, magnesium iodide, calcium chloride, calcium bromide, calcium iodide, barium chloride, barium bromide, iodine.
- magnesium chloride, calcium chloride, barium chloride, manganese chloride, zinc chloride, copper chloride, magnesium iodide, calcium iodide, barium iodide, manganese iodide, zinc iodide, copper iodide are preferred, magnesium chloride, Manganese chloride, zinc chloride, copper chloride, magnesium iodide, manganese iodide, zinc iodide, and copper iodide are more preferable.
- Lewis base used for generating a reaction product of a metal halide and a Lewis base include phosphorus compounds, carbonyl compounds, nitrogen compounds, ether compounds, alcohols and the like. More specifically, tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, tricresyl phosphate, triethylphosphine, tributylphosphine, triphenylphosphine, diethylphosphinoethane, diphenylphosphinoethane, acetylacetone, benzoyl Acetone, propionitrile acetone, valeryl acetone, ethyl acetylacetone, methyl acetoacetate, ethyl acetoacetate, phenyl acetoacetate, dimethyl malonate, diethyl malonate, diphenyl malonate, acetic acid, octanoic acid, 2-
- tri-2-ethylhexyl phosphate tri-2-ethylhexyl phosphate, tricresyl phosphate, acetylacetone, 2-ethylhexanoic acid, versatic acid, 2-ethylhexyl alcohol, 1-decanol, lauryl alcohol and the like are preferable.
- the amount of the Lewis base used for producing the reaction product of the metal halide and the Lewis base is preferably 0.01 to 30 mol, more preferably 0.05 to 10 mol, per 1 mol of the metal halide. It is preferable to perform a polymerization reaction using a polymerization catalyst mainly composed of a reaction product of a metal halide and a Lewis base because the amount of metal remaining in the resulting conjugated diene polymer can be reduced.
- the amount of each component (components (e) to (g)) that is a main component of the polymerization catalyst can be appropriately set as necessary.
- the amount of component (e) used is preferably 0.00001 to 1.0 mmol, more preferably 0.0001 to 0.5 mmol, based on 100 g of the conjugated diene compound.
- the amount of component (e) used is less than 0.00001 mmol, the polymerization activity tends to decrease. On the other hand, if it exceeds 1.0 mmol, the catalyst concentration increases and a decalcification step may be required.
- the preferred amount of alumoxane contained in the polymerization catalyst can be represented by the molar ratio of the component (e) and aluminum (Al) contained in the alumoxane. That is, “component (e)”: “aluminum (Al) contained in alumoxane” (mol ratio) is preferably 1: 1 to 1: 500, more preferably 1: 3 to 1: 250. 1: 5 to 1: 200 is particularly preferable. Outside the above range, the catalyst activity tends to decrease, or a step of removing the catalyst residue may be required.
- the preferable amount of the component (g) contained in the polymerization catalyst can be represented by the molar ratio of the halogen atom contained in the component (g) to the component (e). That is, (halogen atom) / ((e) component) (mol ratio) is preferably 0.1 to 20, more preferably 0.2 to 15, and more preferably 0.5 to 8. Particularly preferred.
- the polymerization catalyst contains at least one of a conjugated diene compound and a non-conjugated diene compound (hereinafter also referred to as “co-catalyst”) for the purpose of improving the catalytic activity. You may let them.
- the amount of the cocatalyst used is preferably 1000 mol or less, more preferably 0.5 to 750 mol, and particularly preferably 1 to 500 mol with respect to 1 mol of component (e).
- Specific examples of the conjugated diene compound include 1,3-butadiene, isoprene and the like, as in the monomer for polymerization.
- non-conjugated diene compound examples include divinylbenzene, diisopropenylbenzene, triisopropenylbenzene, 1,4-vinylhexadiene, ethylidene norbornene and the like.
- the polymerization catalyst can be prepared, for example, by reacting the components (e) to (g) dissolved in a solvent and a cocatalyst added as necessary.
- the addition order of each component may be arbitrary. However, it is preferable that the respective components are mixed and reacted in advance and aged in view of improving the polymerization activity and shortening the polymerization initiation induction period.
- the aging temperature is preferably 0 to 100 ° C., more preferably 20 to 80 ° C. When the aging temperature is less than 0 ° C., aging tends to be insufficient.
- the catalytic activity tends to decrease and the molecular weight distribution of the resulting conjugated diene polymer tends to be broadened.
- the aging time is not particularly limited, and it is sufficient if it is 0.5 minutes or longer, and each component may be brought into contact in the line before being added to the polymerization reaction tank. .
- the prepared catalyst is stable for several days. By using such a catalyst, a conjugated diene polymer having an active terminus having a cis-1,4-bond content of 80% or more can be prepared.
- the molecular weight distribution (weight average molecular weight (Mw) / number average molecular weight (Mn)) of the conjugated diene polymer is preferably 6 or less, more preferably 5.5 or less, and further preferably 5 or less. Particularly preferred.
- the molecular weight distribution of the conjugated diene polymer can be easily adjusted by controlling the molar ratio of the main components (components (e) to (g)) of the polymerization catalyst.
- the Mooney viscosity (ML 1 + 4 , 100 ° C.) at 100 ° C. of the conjugated diene polymer is preferably 10 to 150, more preferably 15 to 130, and particularly preferably 20 to 120. . If the Mooney viscosity is less than 10, the fracture strength, wear resistance, etc. of the resulting vulcanized rubber may be lowered. On the other hand, if the Mooney viscosity is more than 150, the processability during kneading of the obtained (a2) polymer may be lowered.
- the Mooney viscosity can be easily adjusted by controlling the molar ratio of the main components (components (e) to (g)) of the polymerization catalyst.
- alkoxysilane compound used for primary modification of the active terminal of the conjugated diene polymer is a compound represented by the following general formula (1), a compound represented by the following general formula (2), or the following general formula ( It is preferably at least one selected from the group consisting of compounds represented by 3) and partial condensates of these compounds.
- the “partial condensate” referred to here means that a part (not all) of the Si—OR bonds of the compounds represented by the following general formulas (1) to (3) are converted into Si—O—Si by condensation. A thing that has changed to a bond.
- a 1 is (thio) epoxy group, (thio) isocyanate group, (thio) ketone group, (thio) aldehyde group, imino group, cyano group, amide group, isocyanuric acid trihydrocarbyl ester
- R 1 represents a single bond or a divalent inert hydrocarbon group
- R 2 and R 3 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms.
- n represents an integer of 0 to 2.
- R 2 have more than one plurality of R 2 may be the same or different.
- OR 3 there is a plurality, the plurality of OR 3 may be the same or different.
- numerator of the compound represented by the said General formula (1) an active proton and onium salt are not contained.
- a 2 is a monovalent group having at least one functional group selected from the group consisting of a cyclic or acyclic tertiary amino group, a pyridyl group, a sulfide group, and a multisulfide group.
- R 4 represents a single bond or a divalent inert hydrocarbon group
- R 5 and R 6 are each independently a monovalent aliphatic hydrocarbon group or carbon number of 1 to 20 carbon atoms.
- the plurality of R 5 s may be the same or different.
- the OR 6 there is more than one a plurality of OR 6 may be the same or different.
- numerator of the compound represented by the said General formula (2) an active proton and onium salt are not contained.
- a 3 is a hydroxyl group, a thiol group, a primary amino group, an onium salt of a primary amine, a cyclic or acyclic secondary amino group, an onium salt of a cyclic or acyclic secondary amine, A monovalent group having at least one functional group selected from the group consisting of an onium salt of a cyclic or acyclic tertiary amine, a group having an aryl Sn bond or an arylalkyl Sn bond, a sulfonyl group, and a sulfinyl group , R 7 represents a single bond or a divalent inert hydrocarbon group, and R 8 and R 9 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms or 6 to 6 carbon atoms.
- R 8 have more than one plurality of R 8 is may be the same or different.
- OR 9 have more than one plurality of OR 9 may be the same or different.
- the imino group among the functional groups represented by A 1 includes ketimine, aldimine, and amidine.
- the (thio) carboxylic acid ester group includes unsaturated carboxylic acid ester groups such as acrylate and methacrylate.
- Specific examples of the metal constituting the metal salt of (thio) carboxylic acid include alkali metals, alkaline earth metals, Al, Sn, Zn, and the like.
- a preferred example of the divalent inert hydrocarbon group among the groups represented by R 1 includes an alkylene group having 1 to 20 carbon atoms.
- the alkylene group may be linear, branched or cyclic, but is preferably linear.
- Specific examples of the linear alkylene group include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, a decamethylene group, and a dodecamethylene group.
- specific examples of the monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms among the groups represented by R 2 and R 3 include an alkyl group having 1 to 20 carbon atoms, Examples thereof include alkenyl groups having 2 to 18 carbon atoms.
- the monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms in the group represented by R 2 and R 3 in the general formula (1) include an aryl group having 6 to 18 carbon atoms, Examples thereof include aralkyl groups having 7 to 18 carbon atoms. More specifically, a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a benzyl group, a phenethyl group, a naphthylmethyl group, etc. can be mentioned.
- the aromatic ring of these aromatic hydrocarbon groups may have a substituent such as a lower alkyl group.
- the compound represented by the general formula (1) include 2-glycidoxyethyltrimethoxysilane, 2-glycidoxyethyltriethoxysilane, (2-glycidoxyethyl) methyldimethoxysilane, 3 Glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, (3-glycidoxypropyl) methyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3 , 4-epoxycyclohexyl) ethyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyl (methyl) dimethoxysilane, and (thio) epoxy group-containing alkoxysilane in which the epoxy group in these compounds is replaced with a thioepoxy group Compound;
- Cyano group-containing alkoxysilane compounds such as carboxylic acid anhydride-containing compounds such as 3-cyanopropyltrimethoxysilane, 3-cyanopropyltriethoxysilane, 3-cyanoethyltrimethoxysilane, and 3-cyanoethyltriethoxysilane;
- Carboxylic acid ester group-containing compounds such as 3-methacryloyloxypropyltriethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-methacryloyloxypropylmethyldiethoxysilane, 3-methacryloyloxypropyltriisopropoxysilane; Isocyanate group-containing compounds such as 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3-isocyanatopropylmethyldiethoxysilane, 3-isocyanatopropyltriisopropoxysilane; 3-triethoxysilylpropyl And carboxylic acid anhydride-containing compounds such as succinic anhydride, 3-trimethoxysilylpropyl succinic anhydride, and 3-methyldiethoxysilylpropyl succinic anhydride.These compounds can be used individually by 1 type or in combination of 2 or more
- the acyclic tertiary amino group in the functional group represented by A 2 includes N, N- (disubstituted) aromatic such as N, N- (disubstituted) aniline. Amines are included. Moreover, the cyclic
- annular tertiary amino group may contain (thio) ether in a part of ring.
- a preferred example of the divalent inert hydrocarbon group among the groups represented by R 4 is an alkylene group having 1 to 20 carbon atoms.
- the alkylene group may be linear, branched or cyclic, but is preferably linear.
- Specific examples of the linear alkylene group include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, a decamethylene group, and a dodecamethylene group.
- specific examples of the monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms among the groups represented by R 5 and R 6 include an alkyl group having 1 to 20 carbon atoms, Examples thereof include alkenyl groups having 2 to 18 carbon atoms.
- specific examples of the monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms among the groups represented by R 5 and R 6 include an aryl group having 6 to 18 carbon atoms, Examples thereof include aralkyl groups having 7 to 18 carbon atoms. More specifically, a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a benzyl group, a phenethyl group, a naphthylmethyl group, etc. can be mentioned.
- the aromatic ring of these aromatic hydrocarbon groups may have a substituent such as a lower alkyl group.
- the compound represented by the general formula (2) include 3-dimethylaminopropyl (triethoxy) silane, 3-dimethylaminopropyl (trimethoxy) silane, 3-diethylaminopropyl (triethoxy) silane, 3-diethylaminopropyl.
- Acyclic three such as (trimethoxy) silane, 2-dimethylaminoethyl (triethoxy) silane, 2-dimethylaminoethyl (trimethoxy) silane, 3-dimethylaminopropyl (diethoxy) methylsilane, 3-dibutylaminopropyl (triethoxy) silane
- a secondary amino group-containing alkoxysilane compound
- hydrocarbyloxysilane compounds such as 2- (trimethoxysilylethyl) pyridine, 2- (triethoxysilylethyl) pyridine, 4- (trimethoxysilylethyl) pyridine, and 4- (triethoxysilylethyl) pyridine be able to. These compounds can be used individually by 1 type or in combination of 2 or more types.
- the primary amino group of the functional group represented by A 3 includes an aromatic amine such as aniline.
- Acyclic secondary amino groups include N- (monosubstituted) aromatic amines such as N- (monosubstituted) aniline.
- the onium salt of an acyclic tertiary amine includes an onium salt of an N, N- (disubstituted) aromatic amine such as N, N- (disubstituted) aniline.
- the cyclic secondary amine and the cyclic tertiary amine may contain (thio) ether in a part of the ring.
- a preferred example of the divalent inert hydrocarbon group among the groups represented by R 7 is an alkylene group having 1 to 20 carbon atoms.
- the alkylene group may be linear, branched or cyclic, but is preferably linear.
- Specific examples of the linear alkylene group include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, a decamethylene group, and a dodecamethylene group.
- specific examples of the monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms among the groups represented by R 8 and R 9 include an alkyl group having 1 to 20 carbon atoms, Examples thereof include alkenyl groups having 2 to 18 carbon atoms.
- specific examples of the monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms among the groups represented by R 8 and R 9 include an aryl group having 6 to 18 carbon atoms, Examples thereof include aralkyl groups having 7 to 18 carbon atoms. More specifically, a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a benzyl group, a phenethyl group, a naphthylmethyl group, etc. can be mentioned.
- the aromatic ring of these aromatic hydrocarbon groups may have a substituent such as a lower alkyl group.
- Specific examples of the compound represented by the general formula (3) include 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, hydroxymethyltrimethoxysilane, hydroxymethyltriethoxysilane, mercaptomethyltrimethoxysilane.
- the compound represented by the general formula (1) is preferable, and 3-glycidoxypropyltrimethoxysilane and 3-glycidoxypropyltriethoxysilane are more preferable.
- the primary denaturation may be performed using either a solution reaction or a solid phase reaction, but a solution reaction is preferred.
- the solvent used in the polymerization reaction may be used as it is, and it is not necessary to remove unreacted monomers.
- the reaction format is not particularly limited, and a batch type reactor or an apparatus such as a multistage continuous reactor or an inline mixer may be used. It is important that the primary modification is carried out after the polymerization reaction without any operations such as solvent removal treatment, water treatment, heat treatment, and isolation of a conjugated diene polymer.
- the reaction temperature for the primary modification is preferably 20 to 100 ° C.
- the reaction temperature is less than 20 ° C.
- the Mooney viscosity of the obtained (a2) polymer tends to increase.
- it exceeds 100 ° C. the active terminal of the conjugated diene polymer tends to be deactivated easily.
- the polymer is preferably prepared by first modifying the active terminal of the conjugated diene polymer with an alkoxysilane compound and then secondarily modifying it in the presence of a condensation accelerator.
- the condensation accelerator includes an oxidation number 2 tin carboxylate represented by the following general formula (10), a carboxylic acid salt of 3 to 20 carbon atoms, an oxidation number 4 tin compound represented by the following general formula (11), and the following: It is preferably composed of at least one compound selected from the group consisting of titanium compounds having an oxidation number of 4 represented by the general formula (12) and water.
- Sn (OCOR 17 ) 2 (10) R 18 r SnA 4 t B 1 (4- tr ) (11) A 5 x TiB 2 (4-x) (12)
- R 17 independently represents an organic group having 2 to 19 carbon atoms.
- a 4 represents an aliphatic carboxylic acid residue having 2 to 30 carbon atoms, a 1,3-dicarbonyl-containing group having 5 to 30 carbon atoms, or a hydrocarbyloxy having 1 to 30 carbon atoms.
- a 5 represents a siloxy group having a total of three substituents selected from the group consisting of a hydrocarbyloxy group having 1 to 30 carbon atoms and an alkyl group having 1 to 30 carbon atoms
- B 2 represents a 1,3-dicarbonyl-containing group having 5 to 30 carbon atoms
- x represents an integer of 2 or 4. If the A 5 there is a plurality, the plurality of A 5 may be the same or different. If the B 2 there is a plurality, the plurality of B 2 can be the same or different.
- Specific examples of the compounds represented by the general formulas (10) and (11) include tin dicarboxylate (preferably a carboxylate having 8 to 20 carbon atoms), dihydrocarbyltin dicarboxylate, and dihydrocarbyltin.
- Specific examples of the compound represented by the general formula (12) include titanium tetraalkoxide, titanium dialkoxybis ( ⁇ , ⁇ -diketonate), titanium tetrakis (trihydrocarboxysiloxide) and the like. it can.
- water or a mixed solvent of water and alcohol can be used in addition to water itself.
- water adsorbed on a solid surface, hydrated water existing in a hydrate, and the like can also be used.
- the amount of water contained in the condensation accelerator is preferably 0.1 mol or more, more preferably 0.5 to 3 mol in terms of metal with respect to the total amount of alkoxysilane compounds present in the reaction system.
- the amount of metal contained in the condensation accelerator is preferably 0.5 to 20 mol.
- the amount of the condensation accelerator used is preferably 0.1 mol or more in terms of metal with respect to the total amount of alkoxysilane compound present in the reaction system.
- the secondary modification is performed using, for example, an alkoxysilane compound in the presence of a condensation accelerator.
- alkoxysilane compound used in this case include the same compounds as those exemplified in the aforementioned “alkoxysilane compound”.
- the alkoxysilane compound used for the primary modification and the alkoxysilane compound used for the secondary modification may be different, but are preferably the same.
- the diene rubber contained in the rubber component may contain “a diene rubber” other than (a1) copolymer and (a2) polymer.
- specific examples of “other diene rubbers” include natural rubber, polyisoprene rubber, high cis 1,4 bond-polybutadiene rubber and the like.
- the ratio of the “other diene rubber” is preferably 75% by mass or less with respect to the whole diene rubber, and 50 mass. % Or less is more preferable, and 40% by mass or less is particularly preferable.
- the filler contains at least one of (b1) carbon black and (b2) silica.
- This filler (B) has the effect of improving the fracture properties such as the tensile strength of the vulcanized rubber, the wear resistance, the rolling resistance and the like, and improving the workability of the rubber composition.
- (B1) Carbon black) (B1) Carbon black is excellent in the effect of improving fracture characteristics such as tensile strength of vulcanized rubber.
- specific examples of (b1) carbon black include SRF, GPF, FEF, ISAF, and SAF.
- the iodine adsorption amount is 60 mg or more and the dibutyl phthalate oil absorption amount is preferably 80 mL / 100 g. From the viewpoint of improving the wear resistance of the obtained vulcanized rubber, HAF, ISAF, and SAF are further. preferable.
- the content ratio of (b1) carbon black is 2 to 100 parts by weight, preferably 2 to 90 parts per 100 parts by weight of the (A) rubber component. Part by mass, more preferably 2 to 75 parts by mass.
- the content ratio of (b1) carbon black is less than 2 parts by mass with respect to 100 parts by mass of the (A) rubber component, the effect of improving the tensile strength of the resulting vulcanized rubber may not be sufficient.
- it exceeds 100 parts by mass the processability of the rubber composition may deteriorate.
- (B2) Silica) (B2) Silica is not particularly limited, but specific examples of (b2) silica include wet silica, dry silica, calcium silicate, aluminum silicate, and the like. Among these, wet silica is preferable from the viewpoint of improving the breaking strength such as tensile strength, wet skid resistance, and rolling resistance of the vulcanized rubber obtained.
- the content ratio of (b2) silica is 30 to 100 parts by weight, preferably 30 to 90 parts by weight with respect to 100 parts by weight of the (A) rubber component. More preferably, it is 30 to 80 parts by mass.
- the content ratio of (b2) silica is less than 30 parts by mass with respect to 100 parts by mass of the (A) rubber component, the effect of improving the rolling resistance of the vulcanized rubber obtained may not be sufficient. On the other hand, if it exceeds 100 parts by mass, the processability of the rubber composition may deteriorate.
- silane coupling agent is further contained in (B) filler.
- silane coupling agent examples include bis (3-triethoxysilylpropyl) tetrasulfide, bis (3-triethoxysilylpropyl) trisulfide, bis (3-triethoxysilylpropyl) disulfide, and bis (2-triethoxy).
- Ethoxysilylethyl) tetrasulfide bis (3-trimethoxysilylpropyl) tetrasulfide, bis (2-trimethoxysilylethyl) tetrasulfide, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 2-mercapto Ethyltrimethoxysilane, 2-mercaptoethyltriethoxysilane, 3-trimethoxysilylpropyl-N, N-dimethylthiocarbamoyl tetrasulfide, 3-triethoxysilylpropyl-N, N-dimethylthioca Vamoyl tetrasulfide, 2-triethoxysilylethyl-N, N-dimethylthiocarbamoyl tetrasulfide, 3-trimethoxysilylpropylbenzothiazolyl te
- silane coupling agents can be used singly or in combination of two or more.
- the proportion of the silane coupling agent contained in the filler is preferably 2 to 20 parts by mass, more preferably 3 to 15 parts by mass with respect to 100 parts by mass of (b2) silica.
- the content ratio of the silane coupling agent is less than 2 parts by mass with respect to 100 parts by mass of (b2) silica, the reinforcing effect by the silane coupling agent may be insufficient.
- the rubber composition may be gelled.
- the (B) filler may contain (b3) inorganic fillers other than (b1) carbon black and (b2) silica.
- (B3) Specific examples of the inorganic filler include aluminum hydroxide, magnesium hydroxide, magnesium oxide, talc, attapulgite, titanium white, titanium black, calcium oxide, calcium hydroxide, aluminum magnesium oxide, clay, kaolin, pyrophyll Examples thereof include light, bentonite, aluminum silicate, magnesium silicate, aluminum calcium silicate, magnesium calcium silicate, and mica.
- these (b3) inorganic fillers can be used individually by 1 type or in combination of 2 or more types.
- the rubber composition of the present invention may contain “other rubber” other than the rubber component (A) as long as the properties are not impaired.
- “other rubber” include ethylene-propylene rubber, silicone rubber, vinylidene fluoride rubber and the like.
- the ratio of the “other rubber” is preferably 0 to 30% by mass with respect to the whole of the rubber component (A), It is more preferably 0 to 25% by mass, and particularly preferably 0 to 20% by mass.
- the rubber composition of the present invention may contain other components other than (A) the rubber component and (B) the filler as long as the properties are not impaired.
- specific examples of other components include vulcanizing agents, vulcanization accelerators, process oils, anti-aging agents, anti-scorching agents, processing aids such as zinc white, stearic acid, and wax, and tackifiers. it can.
- the vulcanizing agent examples include sulfur; peroxides such as di-t-butyl peroxide; sulfur donors such as tetramethylthiuram disulfide and the like. Among these, sulfur is preferable from the viewpoint of imparting durability to the obtained vulcanized rubber.
- the compounding amount of the vulcanizing agent is preferably 0.5 to 5 parts by mass with respect to 100 parts by mass of the (A) rubber component.
- vulcanization accelerator examples include diphenylguanidine, N-tetra-butyl-2-benzothiazol sulfenamide, N-cyclohexyl-2-benzothiazol sulfenamide, and the like.
- the blending amount of the vulcanization accelerator is preferably 1 to 5 parts by mass with respect to 100 parts by mass of the (A) rubber component.
- the antioxidant examples include N-phenyl-N′-isopropyl-p-phenylenediamine, N- (1,3-dimethylbutyl) -N′-phenyl-p-phenylenediamine, and the like.
- the blending amount of the antioxidant is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the rubber component (A).
- the rubber composition of the present invention can prepare a vulcanized rubber suitable for producing a pneumatic tire or the like excellent in abrasion resistance, fracture strength, rolling resistance, wet skid resistance and the like. For this reason, the rubber composition of this invention is suitable as a material for manufacturing the vulcanized rubber for tire treads. In addition to tire treads, it is also suitable as a material for producing vulcanized rubber for undertreads, carcass, sidewalls, and beat parts.
- the rubber composition of the present invention can be produced by kneading (A) a rubber component, (B) a filler, and other components to be added as necessary.
- a kneader such as an open kneader such as a roll or a closed kneader such as a Banbury mixer can be used.
- an extending oil to the rubber composition. When the extender oil is blended, the processability of the rubber composition can be improved.
- the blending amount of the extending oil is preferably 6 to 55 parts by mass, more preferably 10 to 50 parts by mass with respect to 100 parts by mass of the rubber component (A). If the blending amount of the extender oil is less than 6 parts by mass, it may be difficult to achieve both processability and low fuel consumption. On the other hand, if it exceeds 55 parts by mass, the fuel efficiency may be inferior.
- the pneumatic tire of the present invention is formed using the rubber composition described above. More specifically, the pneumatic tire of the present invention is manufactured using a vulcanized rubber obtained by vulcanizing the above rubber composition. For this reason, the pneumatic tire of the present invention is excellent in wear resistance, breaking strength, rolling resistance, wet skid resistance, and the like.
- the vulcanized rubber used for producing the pneumatic tire can be produced by molding the above rubber composition and then vulcanizing it at a temperature of 130 to 200 ° C., for example.
- the vulcanization method is not particularly limited, and a conventionally known rubber composition vulcanization method can be used.
- Mw / Mn Molecular weight distribution (Mw / Mn): GPC with a trade name “HLC-8120” (manufactured by Tosoh Corporation) was used, and a differential refractometer was used as a detector. Under the conditions shown below, the weight average molecular weight (Mw) and The number average molecular weight (Mn) was measured and calculated from the measured Mw and Mn values.
- tan ⁇ (50 ° C.) was measured using a dynamic spectrometer manufactured by Rheometrics, USA under the conditions of tensile dynamic strain 1%, frequency 10 Hz, 50 ° C. did.
- the rubber composition of Comparative Example 9 was calculated using an index with the value of tan ⁇ (50 ° C.) as the reference (100). It can be evaluated that the larger the calculated index is, the smaller the rolling resistance is. Further, tan ⁇ (0 ° C.) was measured under the conditions of tensile dynamic strain 0.1%, frequency 10 Hz, and 0 ° C. using the same apparatus.
- the rubber composition of Comparative Example 9 was calculated as an index with the value of tan ⁇ (0 ° C.) as the reference (100). It can be evaluated that the greater the calculated index, the better the wet skid resistance.
- the obtained SBR-A has a vinyl bond content of 55%, a bonded styrene content of 20%, a glass transition temperature of -36 ° C, a Mooney viscosity (ML 1 + 4 , 100 ° C) of 28, and a weight average molecular weight (Mw). Was 2300000.
- SBR-F modified styrene-butadiene copolymer
- the polymerization conversion of 1,3-butadiene was almost 100%. 200 g of the polymer solution was extracted, and a methanol solution containing 1.5 g of 2,4-di-tert-butyl-p-cresol was added to stop the polymerization reaction. Subsequently, the solvent was removed by steam stripping, and drying was performed with a roll adjusted to 110 ° C. to obtain a conjugated diene polymer.
- the obtained conjugated diene polymer (before the modification reaction) has a cis-1,4-bond content of 97%, a 1,2-vinyl bond content of 1.1%, and a molecular weight distribution (Mw / Mn) of 2. .2 and Mooney viscosity (ML 1 + 4 , 100 ° C.) was 18.
- the obtained modified conjugated diene polymer solution was added to 20 L of an aqueous sodium hydroxide solution adjusted to pH 10, and the solvent was removed at 110 ° C. for 2 hours and a condensation reaction was performed.
- a modified conjugated diene polymer (BR-Y) was obtained by drying with a roll adjusted to 110 ° C.
- the obtained BR-Y had a molecular weight distribution (Mw / Mn) of 2.7 and a Mooney viscosity (ML 1 + 4 , 100 ° C.) of 43.
- Example 1 70 parts modified styrene-butadiene copolymer (SBR-A), 30 parts modified conjugated diene polymer (BR-Y), extended oil (trade name “Aromax # 3” (Fujikosan Co., Ltd.)) 37.5 Part, silica (trade name “Nipsil AQ” (manufactured by Nippon Silica)) 70 parts, carbon black (trade name “Dia Black N339” (manufactured by Mitsubishi Chemical)) 5.6 parts, silane coupling agent (trade name “ 5.6 parts of Si69 "(manufactured by Degussa), 2 parts of stearic acid, 1 part of anti-aging agent (trade name” NOCRACK 810NA "(manufactured by Ouchi Shinsei Chemical Co., Ltd.)), 3 parts of zinc oxide, vulcanization accelerator NS (trade name “Noxeller NS / F” (Ouchi Shinsei Chemical Co., Ltd.)) 1.5 parts,
- the formulation is shown in Table 4.
- the compound obtained using a 250 cc lab plast mill was kneaded to obtain a rubber composition (Example 1).
- the resulting rubber composition was vulcanized at 145 ° C. to prepare a vulcanized rubber.
- the prepared vulcanized rubber had a tensile strength (index) of 118, a tan ⁇ (0 ° C.) (index) of 116, a tan ⁇ (50 ° C.) (index) of 129, and an abrasion resistance (index) of 122.
- Examples 2 to 20, Comparative Examples 1 to 9 A rubber composition was prepared in the same manner as in Example 1 except that a (modified) styrene-butadiene copolymer of the type shown in Tables 5 and 6 and a (modified) conjugated diene polymer were used. Products (Examples 2 to 20, Comparative Examples 1 to 9) were obtained. Also, vulcanized rubber was prepared by the same operation as in Example 1 using the obtained rubber compositions (Examples 2 to 20, Comparative Examples 1 to 9). Tables 5 and 6 show the tensile strength (index), tan ⁇ (0 ° C.) (index), tan ⁇ (50 ° C.) (index), and wear resistance (index) of the prepared vulcanized rubber.
- a vulcanized rubber having significantly improved tensile strength, rolling resistance (tan ⁇ (50 ° C.)), wet skid resistance (tan ⁇ (0 ° C.)), and abrasion resistance can be prepared. It is.
- a high-performance pneumatic tire excellent in various properties such as tensile strength, rolling resistance, wet skid resistance, and wear resistance can be manufactured and supplied to the market. .
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Abstract
Description
(前記一般式(10)中、R17は、相互に独立に、炭素数2~19の有機基を示す)
(前記一般式(11)中、A4は、炭素数2~30の脂肪族カルボン酸残基、炭素数5~30の1,3-ジカルボニル含有基、炭素数1~30のヒドロカルビルオキシ基、及び炭素数1~20のヒドロカルビル基からなる群より選択される基で合計三置換(同一であっても、異なっていてもよい)されたシロキシ基を示し、B1は、ヒドロキシル基又はハロゲン原子を示し、R18は、炭素数1~30の脂肪族炭化水素基を示し、rは、1~3の整数を示し、tは、1又は2の整数を示し、t+r=3又は4である。A4が複数ある場合には、複数のA4は同一であっても、異なっていてもよい。R18が複数ある場合には、複数のR18は同一であっても、異なっていてもよい)
(前記一般式(12)中、A5は、炭素数1~30のヒドロカルビルオキシ基、及び炭素数1~30のアルキル基からなる群より選択される基で合計三置換されたシロキシ基を示し、B2は、炭素数5~30の1,3-ジカルボニル含有基を示し、xは、2又は4の整数を示す。A5が複数ある場合には、複数のA5は同一であっても、異なっていてもよい。B2が複数ある場合には、複数のB2は同一であっても、異なっていてもよい)
本発明のゴム組成物は、(A)ゴム成分と、(B)充填剤と、を含有するものである。以下、その詳細について説明する。
(A)ゴム成分は、ジエン系ゴムを含有するものである。このジエン系ゴムには、(a1)変性スチレン-ブタジエン共重合体(以下、「(a1)共重合体」ともいう)、及び(a2)変性共役ジエン系重合体(以下、「(a2)重合体」ともいう)が含有されている。なお、ジエン系ゴムは、本質的に(a1)共重合体と(a2)重合体からなるものであることが好ましい。
ジエン系ゴムに含有される(a1)共重合体の割合は、(a1)共重合体と(a2)重合体の合計を100質量%とした場合に、20質量%以上、好ましくは20~95質量%、更に好ましくは25~90質量%である。(a1)共重合体の含有割合が20質量%未満であると、加硫ゴムの破壊強度、耐摩耗性、転がり抵抗性が劣る場合がある。
(a1)共重合体は、スチレン-ブタジエン共重合体の末端が変性されたもの(変性SBR)である。(a1)共重合体に含まれる1,3-ブタジエンに由来する構造単位の割合は、全構造単位中、通常、55~99質量%、好ましくは55~95質量%、更に好ましくは58~90質量%である。また、1,3-ブタジエンに由来する構造単位中のビニル結合含有量は、通常、70%以下、好ましくは15~70%、更に好ましくは18~67%である。ビニル結合含有量が70%超であると、加硫ゴムの破壊強度、耐摩耗性、転がり抵抗性が劣る場合がある。なお、1,3-ブタジエンに由来する構造単位中のビニル結合含有量は、重合反応中にエーテル化合物と3級アミン化合物の少なくともいずれかを添加することで調整することができる。
(a2)重合体は、シス-1,4-結合の含有割合が80%以上である共役ジエン系重合体の活性末端がアルコキシシラン化合物で第一次変性されたものである。
(a2)重合体を調製するために用いられる共役ジエン系重合体は、共役ジエン化合物に由来する構造単位中、シス-1,4-結合の含有割合が80%以上、好ましくは、82%以上、更に好ましくは84%以上のものである。この共役ジエン系重合体を調製する際の重合反応方法については、特に制限されるものではなく、溶液重合方法、気相重合方法、バルク重合方法等の従来公知の方法を用いることができる。なかでも、溶液重合方法が好ましい。溶液重合方法により重合を行う場合、反応に不活性な有機溶媒を重合溶媒として使用することが好ましい。重合溶媒として用いられる有機溶媒の具体例としては、脂肪族、脂環族、芳香族等の炭化水素溶媒等を挙げることができる。より具体的には、プロパン、n-ブタン、イソブタン、n-ペンタン、イソペンタン、n-ヘキサン、シクロヘキサン、プロペン、1-ブテン、イソブテン、トランス-2-ブテン、シス-2-ブテン、1-ペンテン、2-ペンテン、1-ヘキセン、2-ヘキセン、ベンゼン、トルエン、キシレン、エチルベンゼン等を挙げることができる。なお、これらの有機溶媒は、一種単独で又は二種以上を組み合わせて用いることができる。
(f)成分:アルモキサン、及び/又は、一般式(4):AlR10R11R16で表される有機アルミニウム化合物(但し、一般式(4)中、R10及びR11は、相互に独立に、水素原子又は炭素数1~10の炭化水素基を示し、R16は、炭素数1~10の炭化水素基を示す)
(g)成分:その分子構造中に少なくとも一つのハロゲン元素を含有するハロゲン含有化合物
共役ジエン系重合体の活性末端を第一次変性するために用いるアルコキシシラン化合物は、下記一般式(1)で表される化合物、下記一般式(2)で表される化合物、下記一般式(3)で表される化合物、及びこれらの化合物の部分縮合物からなる群より選択される少なくとも一種であることが好ましい。なお、ここでいう「部分縮合物」とは、下記一般式(1)~(3)で表される化合物のSi-OR結合の一部(全部ではない)が、縮合によりSi-O-Si結合に変化したものをいう。
縮合促進剤は、下記一般式(10)で表される酸化数2のスズの炭素数3~20のカルボン酸塩、下記一般式(11)で表される酸化数4のスズ化合物、及び下記一般式(12)で表される酸化数4のチタン化合物からなる群より選択される少なくとも一種の化合物と、水と、からなるものであることが好ましい。
Sn(OCOR17)2 ・・・(10)
R18 rSnA4 tB1 (4-t-r) ・・・(11)
A5 xTiB2 (4-x) ・・・(12)
第二次変性は、縮合促進剤の存在下、例えばアルコキシシラン化合物を用いて行われる。この際に用いられるアルコキシシラン化合物の具体例としては、前述の「アルコキシシラン化合物」において例示したものと同様のものを挙げることができる。なお、第一次変性の際に用いられるアルコキシシラン化合物と、第二次変性の際に用いられるアルコキシシラン化合物は、異なるものであってもよいが、同一のものであることが好ましい。
(A)ゴム成分に含有されるジエン系ゴムには、(a1)共重合体及び(a2)重合体以外の「他のジエン系ゴム」が含有されていてもよい。「他のジエン系ゴム」の具体例としては、天然ゴム、ポリイソプレンゴム、高シス1,4結合-ポリブタジエンゴム等を挙げることができる。なお、「他のジエン系ゴム」をジエン系ゴムに含有させる場合における、「他のジエン系ゴム」の割合は、ジエン系ゴムの全体に対して75質量%以下であることが好ましく、50質量%以下であることが更に好ましく、40質量%以下であることが特に好ましい。
(B)充填剤には、(b1)カーボンブラックと(b2)シリカの少なくともいずれかが含有されている。この(B)充填剤は、加硫ゴムの引張強度等の破壊特性、耐摩耗性、転がり抵抗性等を向上させるとともに、ゴム組成物の加工性を良好にする効果がある。
(b1)カーボンブラックは、加硫ゴムの引張強度等の破壊特性の改良効果に優れる。特に制限されるものではないが、(b1)カーボンブラックの具体例としては、SRF、GPF、FEF、ISAF、SAF等を挙げることができる。なかでも、ヨウ素吸着量が60mg以上であるとともに、ジブチルフタレート吸油量が80mL/100gであるものが好ましく、得られる加硫ゴムの耐摩耗性を向上させる観点からは、HAF、ISAF、SAFが更に好ましい。
(b2)シリカは、特に制限されるものではないが、(b2)シリカの具体例として、湿式シリカ、乾式シリカ、ケイ酸カルシウム、ケイ酸アルミニウム等を挙げることができる。なかでも、得られる加硫ゴムの引張強度等の破壊強度、ウェッドスキッド抵抗性、転がり抵抗性を向上させる観点からは、湿式シリカが好ましい。
(B)充填剤には、(b1)カーボンブラック及び(b2)シリカ以外の(b3)無機充填剤を含有させることもできる。(b3)無機充填剤の具体例としては、水酸化アルミニウム、水酸化マグネシウム、酸化マグネシウム、タルク、アタパルジャイト、チタン白、チタン黒、酸化カルシウム、水酸化カルシウム、酸化アルミニウムマグネシウム、クレー、カオリン、パイロフィライト、ベントナイト、ケイ酸アルミニウム、ケイ酸マグネシウム、ケイ酸アルミニウムカルシウム、ケイ酸マグネシウムカルシウム、マイカ等を挙げることができる。なお、これらの(b3)無機充填剤は、一種単独で又は二種以上を組み合わせて用いることができる。
本発明のゴム組成物には、その性質を損なわない範囲で、(A)ゴム成分以外の「他のゴム」を含有させることができる。「他のゴム」の具体例としては、エチレン-プロピレンゴム、シリコーンゴム、フッ化ビニリデンゴム等を挙げることができる。なお、「他のゴム」を本発明のゴム組成物に含有させる場合における、「他のゴム」の割合は、(A)ゴム成分の全体に対して0~30質量%であることが好ましく、0~25質量%であることが更に好ましく、0~20質量%であることが特に好ましい。
本発明のゴム組成物には、その性質を損なわない範囲で、(A)ゴム成分及び(B)充填剤以外のその他の成分を含有させることもできる。その他の成分の具体例としては、加硫剤、加硫促進剤、プロセス油、老化防止剤、スコーチ防止剤、亜鉛華、ステアリン酸、ワックス等の加工助剤、粘着付与剤等を挙げることができる。
本発明のゴム組成物は、耐摩耗性、破壊強度、転がり抵抗性、ウェッドスキッド抵抗性等に優れた空気入りタイヤ等を製造するのに好適な加硫ゴムを調製可能なものである。このため本発明のゴム組成物は、タイヤトレッド用の加硫ゴムを製造するための材料として好適である。なお、タイヤトレッド用以外にも、アンダートレッド用、カーカス用、サイドウォール用、及びビート部用の加硫ゴムを製造するための材料としても好適である。
本発明のゴム組成物は、(A)ゴム成分、及び(B)充填剤、並びに必要に応じて添加させるその他の成分を混練することで製造することができる。混練に際しては、ロール等の開放式混練機、バンバリーミキサーをはじめとする密閉式混練機等の混練機を用いることができる。なお、混練に際しては、ゴム組成物に伸展油を配合することも好ましい。伸展油を配合すると、ゴム組成物の加工性を良好にすることができる。伸展油の配合量は、(A)ゴム成分100質量部に対して、6~55質量部であることが好ましく、10~50質量部であることが更に好ましい。伸展油の配合量が6質量部未満であると、加工性と低燃費性を両立させることが困難な場合がある。一方、55質量部超であると、低燃費性に劣る場合がある。
本発明の空気入りタイヤは、前述のゴム組成物を用いてなるものである。より具体的には、本発明の空気入りタイヤは、前述のゴム組成物を加硫して得られる加硫ゴムを用いて製造されるものである。このため、本発明の空気入りタイヤは、耐摩耗性、破壊強度、転がり抵抗性、ウェッドスキッド抵抗性等に優れたものである。
カラム:商品名「カラムGMHHXL」(東ソー社製)
流速:1.0m/s
温度:50℃
窒素置換された内容積5Lのオートクレーブ反応器に、シクロヘキサン2500g、テトラヒドロフラン25g、スチレン100g、及び1,3-ブタジエン390gを仕込んだ。反応器の内容物の温度を20℃に調整した後、n-ブチルリチウム375mgを添加して重合を開始した。断熱条件で重合し、最高温度は85℃に達した。重合転化率が99%に達した時点でブタジエン10gを追加し、更に5分重合させた後、メチルトリエトキシシラン1043mgを変性剤として加えて15分間反応を行った。重合反応終了後、2,6-ジ-tert-ブチル-p-クレゾールを添加した。次いで、スチームストリッピングにより脱溶媒を行い、110℃に調温された熱ロールにより乾燥して変性スチレン-ブタジエン共重合体(SBR-A)を得た。得られたSBR-Aのビニル結合含有量は55%、結合スチレン含有量は20%、ガラス転移温度は-36℃、ムーニー粘度(ML1+4,100℃)は28、及び重量平均分子量(Mw)は2300000であった。
表1に示す配合処方としたこと以外は、前述の合成例1の場合と同様の操作により変性スチレン-ブタジエン共重合体(SBR-B、SBR-C、SBR-D、SBR-E、SBR-G、SBR-H、SBR-I、SBR-J)を得た。得られたSBR-B~SBR-E、SBR-G~SBR-Jのビニル結合含有量、結合スチレン含有量、ガラス転移温度、ムーニー粘度(ML1+4,100℃)、及び重量平均分子量(Mw)を表1及び表2に示す。
窒素置換された内容積5Lのオートクレーブ反応器に、シクロヘキサン2500g、テトラヒドロフラン25g、スチレン100g、及び1,3-ブタジエン390gを仕込んだ。反応器の内容物の温度を20℃に調整した後、n-ブチルリチウム375mg及びピペリジン473mgをシクロヘキサン溶剤中で予め反応させて調製した開始剤を添加して重合を開始した。断熱条件で重合し、最高温度は85℃に達した。重合転化率が99%に達した時点でブタジエン10gを追加し、更に5分重合させた後、N-メチルピロリドン579mgを変性剤として加えて10分間反応を行った。その後、四塩化スズ85mgを更に加えて10分間反応を行った。重合反応終了後、2,6-ジ-tert-ブチル-p-クレゾールを添加した。次いで、スチームストリッピングにより脱溶媒を行い、110℃に調温された熱ロールにより乾燥して変性スチレン-ブタジエン共重合体(SBR-F)を得た。得られたSBR-Fのビニル結合含有量、結合スチレン含有量、ガラス転移温度、ムーニー粘度(ML1+4,100℃)、及び重量平均分子量(Mw)を表1及び表2に示す。
窒素置換された5Lオートクレーブに、窒素雰囲気下、シクロヘキサン2400g、及び1,3-ブタジエン300gを仕込んだ。バーサチック酸ネオジム(0.09mmol)のシクロヘキサン溶液、メチルアルモキサン(1.8mmol)のトルエン溶液、水素化ジイソブチルアルミニウム(5.0mmol)、四塩化ケイ素(0.045mmol)のトルエン溶液、及び1,3-ブタジエン(4.5mmol)を、50℃で30分間反応熟成させて予め調製した触媒を添加し、80℃で60分間重合反応を行った。1,3-ブタジエンの重合転化率は、ほぼ100%であった。重合体溶液200gを抜き取り、2,4-ジ-tert-ブチル-p-クレゾール1.5gを含むメタノール溶液を添加し、重合反応を停止させた。次いで、スチームストリッピングにより脱溶媒を行い、110℃に調温されたロールにより乾燥して共役ジエン系重合体を得た。得られた共役ジエン系重合体(変性反応前)のシス-1,4-結合含有量は97%、1,2-ビニル結合含有量は1.1%、分子量分布(Mw/Mn)は2.2、及びムーニー粘度(ML1+4,100℃)は18であった。
表3に示す配合処方としたこと以外は、前述の合成例11の場合と同様の操作により変性共役ジエン系重合体(BR-Z)を得た。得られたBR-Zの分子量分布(Mw/Mn)、及びムーニー粘度(ML1+4,100℃)を表3に示す。
変性スチレン-ブタジエン共重合体(SBR-A)70部、変性共役ジエン系重合体(BR-Y)30部、伸展油(商品名「アロマックス#3」(富士興産社製))37.5部、シリカ(商品名「ニプシルAQ」(日本シリカ社製))70部、カーボンブラック(商品名「ダイアブラックN339」(三菱化学社製))5.6部、シランカップリング剤(商品名「Si69」(デグサ社製))5.6部、ステアリン酸2部、老化防止剤(商品名「ノクラック810NA」(大内新興化学工業社製))1部、酸化亜鉛3部、加硫促進剤NS(商品名「ノクセラーNS・F」(大内新興化学工業社製))1.5部、加硫促進剤CZ(商品名「ノクセラーCZ」(大内新興化学工業社製))1.8部、及び硫黄1.5部を配合して配合物を得た。なお、配合処方を表4に示す。250ccラボプラストミルを用いて得られた配合物を混練し、ゴム組成物(実施例1)を得た。得られたゴム組成物を145℃加硫して加硫ゴムを調製した。調製した加硫ゴムの引張強度(指数)は118、tanδ(0℃)(指数)は116、tanδ(50℃)(指数)は129、及び耐摩耗性(指数)は122であった。
表5及び表6に示す種類の(変性)スチレン-ブタジエン共重合体、及び(変性)共役ジエン系重合体を使用したこと以外は、前述の実施例1の場合と同様の操作により、ゴム組成物(実施例2~20、比較例1~9)を得た。また、得られたゴム組成物(実施例2~20、比較例1~9)を用いて、前述の実施例1の場合と同様の操作により、加硫ゴムを調製した。調製した加硫ゴムの引張強度(指数)、tanδ(0℃)(指数)、tanδ(50℃)(指数)、及び耐摩耗性(指数)を表5及び表6に示す。
BR01:商品名「ポリブタジエンゴムBR01」、JSR社製(シス-1,4-結合含有量=95%、1,2-ビニル結合含有量=2.5%、ムーニー粘度(ML1+4,100℃)=45)
Claims (12)
- スチレン-ブタジエン共重合体の末端が変性された(a1)変性スチレン-ブタジエン共重合体を20質量%以上、及び(a2)変性共役ジエン系重合体を5質量%以上含有するジエン系ゴムを含む(A)ゴム成分と、
(B)充填剤と、を含有し、
前記(a2)変性共役ジエン系重合体が、シス-1,4-結合の含有割合が80%以上である共役ジエン系重合体の活性末端が少なくともアルコキシシラン化合物で第一次変性されたものであり、
前記(B)充填剤が、前記(A)ゴム成分100質量部に対して2~100質量部の(b1)カーボンブラックと、前記(A)ゴム成分100質量部に対して30~100質量部の(b2)シリカの少なくともいずれかを含有するものであるゴム組成物。 - 前記(B)充填剤が、前記(b2)シリカを含有するものである場合に、
前記(b2)シリカ100質量部に対して、5~20質量部のシランカップリング剤を更に含有する請求項1に記載のゴム組成物。 - 前記(a1)変性スチレン-ブタジエン共重合体が、有機アルカリ金属、有機アルカリ土類金属、アルカリ金属アミド化合物、及びアルカリ土類金属アミド化合物からなる群より選択される少なくとも一種の化合物を開始剤として使用して、ブタジエンとスチレンを炭化水素溶媒中でアニオン重合させた後、その活性重合体末端と変性剤を反応させて得られたものである請求項1又は2に記載のゴム組成物。
- 前記(a1)変性スチレン-ブタジエン共重合体が、前記スチレン-ブタジエン共重合体の末端に、エポキシ基、水酸基、1級アミノ基、2級アミノ基、3級アミノ基、ヘテロ環、及びアルコキシシリル基からなる群より選択される少なくとも一種の官能基が導入されたものである請求項1~3のいずれか一項に記載のゴム組成物。
- 前記(a2)変性共役ジエン系重合体が、前記共役ジエン系重合体の活性末端が前記アルコキシシラン化合物により第一次変性された後、縮合促進剤の存在下で第二次変性されて得られたものである請求項1~4のいずれか一項に記載のゴム組成物。
- 前記アルコキシシラン化合物が、下記一般式(1)で表される化合物、下記一般式(2)で表される化合物、下記一般式(3)で表される化合物、及びこれらの化合物の部分縮合物からなる群より選択される少なくとも一種である請求項1~5のいずれか一項に記載のゴム組成物。
- 前記アルコキシシラン化合物が、前記一般式(1)で表される化合物と前記一般式(1)で表される化合物の部分縮合物の少なくともいずれかである請求項6に記載のゴム組成物。
- 前記アルコキシシラン化合物が、3-グリシドキシプロピルトリメトキシシラン、3-グリシドキシプロピルトリエトキシシラン、及びこれらの化合物の部分縮合物からなる群より選択される少なくとも一種である請求項7に記載のゴム組成物。
- 前記縮合促進剤が、下記一般式(10)で表される酸化数2のスズの炭素数3~20のカルボン酸塩、下記一般式(11)で表される酸化数4のスズ化合物、及び下記一般式(12)で表される酸化数4のチタン化合物からなる群より選択される少なくとも一種の化合物と、水と、を含んでなるものである請求項5に記載のゴム組成物。
Sn(OCOR17)2 ・・・(10)
(前記一般式(10)中、R17は、相互に独立に、炭素数2~19の有機基を示す)
R18 rSnA4 tB1 (4-t-r) ・・・(11)
(前記一般式(11)中、A4は、炭素数2~30の脂肪族カルボン酸残基、炭素数5~30の1,3-ジカルボニル含有基、炭素数1~30のヒドロカルビルオキシ基、及び炭素数1~20のヒドロカルビル基からなる群より選択される基で合計三置換(同一であっても、異なっていてもよい)されたシロキシ基を示し、B1は、ヒドロキシル基又はハロゲン原子を示し、R18は、炭素数1~30の脂肪族炭化水素基を示し、rは、1~3の整数を示し、tは、1又は2の整数を示し、t+r=3又は4である。A4が複数ある場合には、複数のA4は同一であっても、異なっていてもよい。R18が複数ある場合には、複数のR18は同一であっても、異なっていてもよい)
A5 xTiB2 (4-x) ・・・(12)
(前記一般式(12)中、A5は、炭素数1~30のヒドロカルビルオキシ基、及び炭素数1~30のアルキル基からなる群より選択される基で合計三置換されたシロキシ基を示し、B2は、炭素数5~30の1,3-ジカルボニル含有基を示し、xは、2又は4の整数を示す。A5が複数ある場合には、複数のA5は同一であっても、異なっていてもよい。B2が複数ある場合には、複数のB2は同一であっても、異なっていてもよい) - 前記(a2)変性共役ジエン系重合体が、変性ポリブタジエンである請求項1~9のいずれか一項に記載のゴム組成物。
- タイヤトレッド用の加硫ゴムに用いられる請求項1~10のいずれか一項に記載のゴム組成物。
- 請求項1~11のいずれか一項に記載のゴム組成物を用いてなる空気入りタイヤ。
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US9365703B2 (en) | 2012-06-12 | 2016-06-14 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tread, and pneumatic tire |
Also Published As
Publication number | Publication date |
---|---|
EP2407507A1 (en) | 2012-01-18 |
BRPI1009262B1 (pt) | 2019-07-02 |
EP2407507A4 (en) | 2016-02-24 |
EP2407507B1 (en) | 2016-09-28 |
CN102348748A (zh) | 2012-02-08 |
BRPI1009262A2 (pt) | 2016-03-08 |
KR20110131217A (ko) | 2011-12-06 |
CN102348748B (zh) | 2013-09-04 |
US20110319519A1 (en) | 2011-12-29 |
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