WO2020179705A1 - 変性共役ジエン系重合体の製造方法、変性共役ジエン系重合体、重合体組成物、架橋体及びタイヤ - Google Patents
変性共役ジエン系重合体の製造方法、変性共役ジエン系重合体、重合体組成物、架橋体及びタイヤ Download PDFInfo
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- WO2020179705A1 WO2020179705A1 PCT/JP2020/008462 JP2020008462W WO2020179705A1 WO 2020179705 A1 WO2020179705 A1 WO 2020179705A1 JP 2020008462 W JP2020008462 W JP 2020008462W WO 2020179705 A1 WO2020179705 A1 WO 2020179705A1
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- Prior art keywords
- conjugated diene
- carbon atoms
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- compound
- polymer
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- ZYBZLPTXDDWJFH-UHFFFAOYSA-N CCC(C)CC(C)([Li])C1=CC=CC(C([Li])(C)CC(C)CC)=C1 Chemical compound CCC(C)CC(C)([Li])C1=CC=CC(C([Li])(C)CC(C)CC)=C1 ZYBZLPTXDDWJFH-UHFFFAOYSA-N 0.000 description 1
- XBPCUCUWBYBCDP-UHFFFAOYSA-N Dicyclohexylamine Chemical compound C1CCCCC1NC1CCCCC1 XBPCUCUWBYBCDP-UHFFFAOYSA-N 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 1
- ABKPQLRBJKKBRN-UHFFFAOYSA-N N,N'-dimethyl-N'-trimethylsilylhexane-1,6-diamine Chemical compound CNCCCCCCN([Si](C)(C)C)C ABKPQLRBJKKBRN-UHFFFAOYSA-N 0.000 description 1
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- PJANXHGTPQOBST-VAWYXSNFSA-N Stilbene Natural products C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- BZEZSORUWZUMNU-UHFFFAOYSA-N [Li]CCCC[Li] Chemical compound [Li]CCCC[Li] BZEZSORUWZUMNU-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 125000000732 arylene group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- UFADJPZTTUWZMP-UHFFFAOYSA-N azacyclotridecane Chemical compound C1CCCCCCNCCCCC1 UFADJPZTTUWZMP-UHFFFAOYSA-N 0.000 description 1
- ZSIQJIWKELUFRJ-UHFFFAOYSA-N azepane Chemical compound C1CCCNCC1 ZSIQJIWKELUFRJ-UHFFFAOYSA-N 0.000 description 1
- QXNDZONIWRINJR-UHFFFAOYSA-N azocane Chemical compound C1CCCNCCC1 QXNDZONIWRINJR-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- PBGVMIDTGGTBFS-UHFFFAOYSA-N but-3-enylbenzene Chemical compound C=CCCC1=CC=CC=C1 PBGVMIDTGGTBFS-UHFFFAOYSA-N 0.000 description 1
- IMJGQTCMUZMLRZ-UHFFFAOYSA-N buta-1,3-dien-2-ylbenzene Chemical compound C=CC(=C)C1=CC=CC=C1 IMJGQTCMUZMLRZ-UHFFFAOYSA-N 0.000 description 1
- 125000004106 butoxy group Chemical group [*]OC([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-ARJAWSKDSA-N cis-but-2-ene Chemical compound C\C=C/C IAQRGUVFOMOMEM-ARJAWSKDSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000582 cycloheptyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000000640 cyclooctyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- SMBQBQBNOXIFSF-UHFFFAOYSA-N dilithium Chemical compound [Li][Li] SMBQBQBNOXIFSF-UHFFFAOYSA-N 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- BLHLJVCOVBYQQS-UHFFFAOYSA-N ethyllithium Chemical compound [Li]CC BLHLJVCOVBYQQS-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012685 gas phase polymerization Methods 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 1
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- SYUYXOYNRMMOGW-UHFFFAOYSA-N n,n-dimethyl-3-phenylprop-2-en-1-amine Chemical compound CN(C)CC=CC1=CC=CC=C1 SYUYXOYNRMMOGW-UHFFFAOYSA-N 0.000 description 1
- UBHHTPOLMACCDD-UHFFFAOYSA-N n,n-dimethyl-4-phenylbut-3-en-1-amine Chemical compound CN(C)CCC=CC1=CC=CC=C1 UBHHTPOLMACCDD-UHFFFAOYSA-N 0.000 description 1
- DZRKBPWATCKLKY-UHFFFAOYSA-N n-benzyl-n-methylprop-2-en-1-amine Chemical compound C=CCN(C)CC1=CC=CC=C1 DZRKBPWATCKLKY-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- RIWRFSMVIUAEBX-UHFFFAOYSA-N n-methyl-1-phenylmethanamine Chemical compound CNCC1=CC=CC=C1 RIWRFSMVIUAEBX-UHFFFAOYSA-N 0.000 description 1
- DYUWTXWIYMHBQS-UHFFFAOYSA-N n-prop-2-enylprop-2-en-1-amine Chemical compound C=CCNCC=C DYUWTXWIYMHBQS-UHFFFAOYSA-N 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004551 spreading oil Substances 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- ORSZMARVMXZDAH-UHFFFAOYSA-N tert-butyl-dimethyl-piperidin-1-ylsilane Chemical compound CC(C)(C)[Si](C)(C)N1CCCCC1 ORSZMARVMXZDAH-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-ONEGZZNKSA-N trans-but-2-ene Chemical compound C\C=C\C IAQRGUVFOMOMEM-ONEGZZNKSA-N 0.000 description 1
- BFAJFQDFDYFZOO-UHFFFAOYSA-N trimethyl-(3-trimethylsilyl-1,3,5-triazinan-1-yl)silane Chemical compound C[Si](C)(C)N1CNCN([Si](C)(C)C)C1 BFAJFQDFDYFZOO-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
-
- 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
- C08C19/25—Incorporating silicon atoms into the molecule
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/22—Incorporating nitrogen atoms into the molecule
-
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/46—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides selected from alkali metals
- C08F4/461—Catalysts containing at least two different components covered by the same or by different subgroups of group C08F4/46, e.g. butyllithium + propylrubidium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
-
- 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
- C08K3/06—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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/06—Butadiene
-
- 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
-
- 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 disclosure relates to a method for producing a modified conjugated diene polymer, a modified conjugated diene polymer, a polymer composition, a crosslinked product, and a tire.
- the conjugated diene-based polymer obtained by polymerization using a conjugated diene compound has good properties such as heat resistance, abrasion resistance, mechanical strength, and moldability. Therefore, pneumatic tires, anti-vibration rubbers, etc. Widely used in various industrial products such as hoses.
- a reinforcing agent such as carbon black or silica is added to the rubber composition together with a conjugated diene polymer. It is known to be blended with. Further, conventionally, in order to enhance the affinity between the conjugated diene polymer and the reinforcing agent, a modified conjugated diene polymer obtained by modifying the conjugated diene polymer with a compound having silicon or nitrogen has been used (). See, for example, Patent Documents 1 to 3).
- the present disclosure has been made in view of the above problems, and one object of the present disclosure is to provide a modified conjugated diene polymer capable of obtaining a crosslinked rubber having high strength and excellent fuel efficiency.
- the present disclosure provides the following methods for producing a modified conjugated diene polymer, a modified conjugated diene polymer, a polymer composition, a crosslinked product, and a tire.
- a conjugated diene-based polymer having an active terminal which is obtained by polymerizing a monomer containing a conjugated diene compound in the presence of an alkali metal compound, and a compound [A] represented by the following formula (1):
- a method for producing a modified conjugated diene polymer which comprises reacting.
- R 1 and R 2 are independently hydrogen atoms or hydrocarbyl groups having 1 to 8 carbon atoms, respectively, or R 1 and R 2 are combined with each other to form R 1 and R 2.
- R 5 and R 6 represents a ring structure composed of 5 to 8 carbon atoms together with the carbon atom bonded to are either each independently a hydrogen atom or a hydrocarbyl group having 1 to 8 carbon atoms, or, R 5 and R 6 represents a ring structure having 5 to 8 carbon atoms which are combined with each other to form a carbon atom to which R 5 and R 6 are bonded, provided that R 1 and R 2 do not become hydrogen atoms at the same time, and R 5 and R 6 6 does not become a hydrogen atom at the same time, R 3 and R 4 are each independently a hydrocarbylene group having 1 to 6 carbon atoms, and R 7 is a hydrocarbylene group having 1 to 10 carbon atoms.
- a modified conjugated diene-based polymer which is a reaction product of a conjugated diene-based polymer having an active terminal and a compound [A] represented by the above formula (1).
- the modified conjugated diene polymer of the present disclosure it is possible to obtain a crosslinked rubber having high strength and excellent fuel efficiency.
- the modified conjugated diene polymer of the present disclosure is a reaction product of a conjugated diene polymer having an active terminal and the compound [A] represented by the above formula (1).
- the modified conjugated diene polymer is produced by a method including the following polymerization step and modification step.
- This step is a step of polymerizing a monomer containing a conjugated diene compound to obtain a conjugated diene-based polymer having an active terminal.
- the conjugated diene compound used for the polymerization include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 1,3-hexadiene, 1,3-heptadiene, 2 -Phenyl-1,3-butadiene, 3-methyl-1,3-pentadiene, 2-chloro-1,3-butadiene and the like can be mentioned.
- 1,3-butadiene, isoprene and 2,3-dimethyl-1,3-butadiene are preferable.
- the conjugated diene-based polymer may be a homopolymer of a conjugated diene compound, but is preferably a copolymer of a conjugated diene compound and an aromatic vinyl compound from the viewpoint of increasing the strength of rubber.
- aromatic vinyl compound used for polymerization include styrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, ⁇ -methylstyrene, 2,4-dimethylstyrene, 2,4-diisopropylstyrene, and 4-.
- t-butylstyrene 5-t-butyl-2-methylstyrene, vinylethylbenzene, divinylbenzene, trivinylbenzene, divinylnaphthalene, t-butoxystyrene, vinylbenzyldimethylamine, (4-vinylbenzyl)dimethylaminoethyl ether, N, N-Dimethylaminoethylstyrene, N, N-dimethylaminomethylstyrene, 2-ethylstyrene, 3-ethylstyrene, 4-ethylstyrene, 2-t-butylstyrene, 3-t-butylstyrene, vinylxylene, Examples thereof include vinylnaphthalene, vinylpyridine, diphenylethylene, and tertiary amino group-containing diphenylethylene (eg, 1-(4-N,N-dimethylaminophen
- the conjugated diene-based polymer is a copolymer of a conjugated diene compound and an aromatic vinyl compound, it has a high living property in anionic polymerization, and in particular, a weight containing 1,3-butadiene and styrene in the monomer composition. It is preferably coalesced.
- the copolymer preferably has a random copolymer moiety in which the distribution of the conjugated diene compound and the aromatic vinyl compound is irregular.
- the copolymer may further have a block moiety made of a conjugated diene compound or an aromatic vinyl compound.
- the proportion of the aromatic vinyl compound used is the ratio of the low hysteresis loss characteristics of the obtained crosslinked polymer and the wet skid resistance.
- the amount is preferably 3 to 55% by mass, and more preferably 5 to 50% by mass, based on the total amount of the conjugated diene compound and the aromatic vinyl compound used for the polymerization.
- the content ratio of the structural unit derived from the aromatic vinyl compound in the polymer is a value measured by 1 H-NMR.
- the conjugated diene compound and the aromatic vinyl compound one type may be used alone, or two or more types may be used in combination.
- a compound other than the conjugated diene compound and the aromatic vinyl compound may be used as the monomer.
- other monomers include acrylonitrile, methyl (meth) acrylate, ethyl (meth) acrylate and the like.
- the ratio of the other monomers used is preferably 10% by mass or less, more preferably 5% by mass or less, based on the total amount of the monomers used for the polymerization.
- any of a solution polymerization method, a gas phase polymerization method and a bulk polymerization method may be used, but the solution polymerization method is particularly preferable.
- a polymerization system either a batch system or a continuous system may be used.
- the solution polymerization method is used, as an example of a specific polymerization method, a monomer containing a conjugated diene compound is polymerized in an organic solvent in the presence of a polymerization initiator and, if necessary, a randomizer. There is a way to do it.
- alkali metal compound is used as the polymerization initiator.
- alkali metal compound include alkyllithium such as methyllithium, ethyllithium, n-propyllithium, n-butyllithium, sec-butyllithium, t-butyllithium; 1,4-dilithiobutane, phenyllithium, stilbene.
- Lithium, naphthyl lithium, 1,3-bis(1-lithio-1,3-dimethylpentyl)benzene, 1,3-phenylene bis(3-methyl-1-phenylpentylidene)dilithium, naphthyl sodium, naphthyl potassium, ethoxy Examples include potassium. Of these, lithium compounds are preferred.
- a compound having a functional group capable of interacting with silica (hereinafter, also referred to as “initiating modifier”) may be used as the alkali metal compound.
- a functional group capable of interacting with silica can be introduced at the polymerization initiation end of the conjugated diene polymer.
- the “functional group that interacts with silica” means a group having an element that interacts with silica, such as nitrogen, sulfur, phosphorus or oxygen.
- Interaction means formation of a covalent bond between molecules or a weaker intermolecular force than covalent bond (eg, ion-dipole interaction, dipole-dipole interaction, hydrogen bond, van der Waals). Electromagnetic force acting between molecules such as force) is formed.
- the starting modifier is preferably a nitrogen-containing alkali metal compound.
- a nitrogen-containing alkali metal compound a compound represented by the following formula (2) is preferably used.
- R 8 is a nitrogen-containing group
- Y 1 is a hydrocarbylene group obtained by polymerization of a conjugated diene compound or an aromatic vinyl compound
- M 1 is an alkali metal.
- n is n. It is an integer from 1 to 10.
- the nitrogen-containing group of R 8 is preferably a monovalent group which is bonded to the group “—(CH 2 ) n —” with a nitrogen atom and does not contain active hydrogen. It is more preferably a primary amino group.
- R 8 is a tertiary amino group is a group “—NR 11 R 12 ”(wherein R 11 and R 12 are each independently a hydrocarbyl group having 1 to 10 carbon atoms).
- the group represented by is mentioned.
- Y 1 as the conjugated diene compound and the aromatic vinyl compound, the compounds exemplified as the monomer used for the polymerization can be used.
- Y 1 is preferably a hydrocarbylene group obtained by polymerization of 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene or styrene, and is obtained by polymerization of isoprene. It is particularly preferably a hydrocarbylene group.
- the degree of polymerization of Y 1 is preferably 2 to 10, and more preferably 2 to 4.
- M 1 include lithium, sodium and potassium, with lithium being preferred.
- the compound represented by the above formula (2) includes ((2E,6E)-11-(dimethylamino)-3,7-dimethylundeca-2,6-dien-1-yl)lithium. Can be preferably used.
- a mixture of a nitrogen-free alkali metal compound and a secondary amine compound can be mentioned.
- the secondary amine compound include dimethylamine, diethylamine, dipropylamine, dibutylamine, dodecamethyleneimine, N,N′-dimethyl-N′-trimethylsilyl-1,6-diaminohexane, piperidine, Pyrrolidine, hexamethyleneimine, heptamethyleneimine, dicyclohexylamine, N-methylbenzylamine, di- (2-ethylhexyl) amine, diallylamine, morpholin, N- (trimethylsilyl) piperazine, N- (tert-butyldimethylsilyl) piperidine, 1,3-Ditrimethylsilyl-1,3,5-triazinan, N-trimethylsilylpiperazine, 1,3,
- the nitrogen-free alkali metal compound and the secondary amine compound may be mixed in advance, and the mixture may be added to the polymerization system to carry out the polymerization. ..
- a nitrogen-free alkali metal compound and a secondary amine compound may be added to the polymerization system, and both may be mixed and polymerized in the polymerization system.
- the amount of the polymerization initiator used (the total amount when two or more kinds are used) is preferably 0.01 to 20 mmol with respect to 100 g of the monomer used for the synthesis of the modified conjugated diene polymer, and 0 More preferably, it is 0.05 to 15 mmol.
- the use ratio of the compound represented by the formula (2) is preferably 50 mol% or more with respect to the total amount of the polymerization initiator (preferably alkali metal compound) used for the polymerization of the monomer, and 60 It is more preferably at least mol%, further preferably at least 80 mol%.
- the randomizer can be used for the purpose of adjusting the vinyl bond content, which represents the vinyl bond content in the polymer.
- the randomizer are dimethoxybenzene, tetrahydrofuran, dimethoxyethane, diethylene glycol dibutyl ether, diethylene glycol dimethyl ether, 2,2-di(tetrahydrofuryl)propane, 2-(2-ethoxyethoxy)-2-methylpropane, triethylamine, pyridine. , N-methylmorpholine, tetramethylethylenediamine and the like. These can be used alone or in combination of two or more.
- the organic solvent used for the polymerization may be any organic solvent which is inert to the reaction, and examples thereof include aliphatic hydrocarbons, alicyclic hydrocarbons and aromatic hydrocarbons. Of these, hydrocarbons having 3 to 8 carbon atoms are preferable, and specific examples thereof include propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, cyclohexane, propene, 1-butene.
- the organic solvent one kind may be used alone, or two or more kinds may be used in combination.
- the monomer concentration in the reaction solvent is preferably 5 to 50% by mass, and preferably 10 to 30% by mass, from the viewpoint of maintaining the balance between productivity and ease of polymerization control. More preferred.
- the temperature of the polymerization reaction is preferably ⁇ 20 ° C. to 150 ° C., more preferably 0 to 120 ° C.
- the polymerization reaction is preferably carried out under a pressure sufficient to keep the monomer substantially in the liquid phase. Such pressure can be obtained by a method such as pressurizing the inside of the reactor with a gas that is inert to the polymerization reaction.
- the polystyrene average weight average molecular weight (Mw) of the obtained conjugated diene polymer by gel permeation chromatography (GPC) is preferably 5.0 ⁇ 10 4 to 1.0 ⁇ 10 6 . If the Mw is less than 5.0 ⁇ 10 4 , the tensile strength, low heat buildup and abrasion resistance of the crosslinked polymer tend to be reduced, and if it is greater than 1.0 ⁇ 10 6 , the modified polymer is The processability of the rubber composition obtained by using the product tends to decrease. It is more preferably 8.0 ⁇ 10 4 to 8.0 ⁇ 10 5 , and further preferably 1.0 ⁇ 10 5 to 5.0 ⁇ 10 5 .
- the vinyl bond content in the butadiene unit (hereinafter, also referred to as “vinyl content”) is preferably 30% by mass or more, and more preferably 33% by mass or more. Is more preferably 35% by mass or more. Further, the vinyl content is preferably 70% by mass or less, more preferably 68% by mass or less, and further preferably 65% by mass or less. If the vinyl content is less than 30 mol %, the grip properties tend to be low, and if it exceeds 70 mass %, the abrasion resistance of the vulcanized rubber obtained tends to be low.
- the “vinyl content” is a value indicating the content ratio of the structural unit having a 1,2-bond to all the structural units of butadiene in the conjugated diene polymer, which is measured by 1 H-NMR. It is a measured value.
- the active terminal of the conjugated diene polymer obtained in the above polymerization step is reacted with the compound [A] represented by the following formula (1).
- the compound [A] as the terminal modifier, a modified conjugated diene-based polymer having a polymer chain having two or more branches and being modified with a group that interacts with silica can be obtained.
- R 1 and R 2 are independently hydrogen atoms or hydrocarbyl groups having 1 to 8 carbon atoms, respectively, or R 1 and R 2 are combined with each other to form R 1 and R 2.
- R 5 and R 6 represents a ring structure composed of 5 to 8 carbon atoms together with the carbon atom bonded to are either each independently a hydrogen atom or a hydrocarbyl group having 1 to 8 carbon atoms, or, R 5 and R 6 represents a ring structure having 5 to 8 carbon atoms composed of carbon atoms to which R 5 and R 6 are bonded together.
- R 1 and R 2 do not become hydrogen atoms at the same time
- R 5 and R 6 does not become a hydrogen atom at the same time.
- R 3 and R 4 are independently hydrocarbylene groups having 1 to 6 carbon atoms
- R 7 is a hydrocarbylene group having 1 to 10 carbon atoms.
- X 1 is a hydrocarbyloxy group having 1 to 4 carbon atoms
- X 2 and X 3 are each independently, .m a hydrocarbyl group or a hydrocarbyloxy group having 1 to 4 carbon atoms is an integer of 1 to 3
- m is 2 or 3
- a plurality of R 3 , R 7 , and X 1 to X 3 are the same group or different groups, respectively.
- the hydrocarbyl group having 1 to 8 carbon atoms represented by R 1 , R 2 , R 5 and R 6 is an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or a carbon atom. Examples thereof include an alkenyl group having 2 to 8 carbon atoms and an aryl group having 6 to 8 carbon atoms.
- Ring structure formed together with the carbon atom to which R 1 and R 2 are keyed by R 1 and R 2 are bonded to each other, and, together with the carbon atom to which R 5 and R 6 are combined R 5 and R 6 are mutually bound
- Examples of the constituted ring structure include a structure having a cyclopentane ring, a cyclohexane ring, a cycloheptane ring or a cyclooctane ring.
- R 1 , R 2 , R 5 and R 6 are preferably hydrocarbyl groups having 1 to 8 carbon atoms, and more preferably linear or branched alkyl groups having 1 to 8 carbon atoms.
- R 3 and R 4 include an alkanediyl group having 1 to 6 carbon atoms, a cycloalkylene group having 3 to 6 carbon atoms, an arcendyl group having 2 to 6 carbon atoms, and a phenylene group.
- R 3 and R 4 are preferably alkanediyl groups having 1 to 6 carbon atoms, more preferably alkanediyl groups having 2 to 6 carbon atoms, and further preferably linear alkanes having 2 to 4 carbon atoms. It is a diyl group.
- R 7 examples include an alkanediyl group having 1 to 10 carbon atoms, a cycloalkylene group having 3 to 10 carbon atoms, an arcendyl group having 2 to 10 carbon atoms, and an arylene group having 6 to 10 carbon atoms. Of these, R 7 is preferably a linear or branched alkanediyl group having 1 to 10 carbon atoms.
- the hydrocarbyloxy group having 1 to 4 carbon atoms of X 1 to X 3 include methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group and the like.
- Examples of the hydrocarbyl group having 1 to 4 carbon atoms for X 2 and X 3 include a methyl group, an ethyl group, a propyl group, an isopropyl group and a butyl group. At least one of X 2 and X 3 is preferably a hydrocarbyloxy group, and more preferably both are hydrocarbyloxy groups, from the viewpoint of further improving the fuel efficiency performance of the crosslinked rubber.
- m is preferably 1 or 2 and more preferably 1 from the viewpoint of suppressing a decrease in processability of the rubber composition obtained by using the modified conjugated diene polymer of the present disclosure.
- the compound [A] include compounds represented by the following formulas (1-1) to (1-15). As the compound [A], one type may be used alone, or two or more types may be used in combination.
- the compound represented by the above formula (1) is obtained by reacting the compound represented by the formula (wherein Y 2 is a halogen atom). This synthetic reaction can be carried out in the presence of a catalyst in a suitable organic solvent, if necessary.
- the method for synthesizing compound [A] is not limited to the above method.
- the reaction between the conjugated diene polymer having an active terminal and the compound [A] is preferably carried out as a solution reaction.
- the ratio of the compound [A] to be used (the total amount when two or more kinds are used) is 0 with respect to 1 mol of the metal atom involved in the polymerization which the polymerization initiator has, from the viewpoint of sufficiently promoting the modification reaction.
- the amount is preferably 0.01 mol or more, more preferably 0.05 mol or more.
- the proportion of compound [A] used is preferably less than 2.0 mol, preferably less than 2.0 mol, with respect to 1 mol of the metal atom involved in the polymerization of the polymerization initiator in order to avoid excessive addition. More preferably, it is less than.
- the temperature of the denaturation reaction is usually the same as that of the polymerization reaction, and is preferably ⁇ 20 ° C. to 150 ° C., more preferably 0 to 120 ° C. When the reaction temperature is low, the viscosity of the modified polymer tends to increase, and when the reaction temperature is high, the polymerization active end is likely to be deactivated.
- the reaction time is preferably 1 minute to 5 hours, more preferably 2 minutes to 1 hour.
- the compound [A] and a compound different from the compound [A] (hereinafter, referred to as "other denaturing agent or coupling agent"). May be used.
- the other modifier or coupling agent is not particularly limited as long as it is a compound capable of reacting with the active terminal of the conjugated diene polymer obtained by the above-mentioned polymerization, and as a modifier or coupling agent for the conjugated diene polymer.
- Known compounds for example, nitrogen-containing alkoxysilane compound, glycidyl group-containing polysiloxane, etc.
- the usage ratio thereof is preferably 5 mol% or less, and more preferably 1 mol% or less.
- the modified conjugated diene polymer contained in the reaction solution can be isolated by a known desolventizing method such as steam stripping and a drying operation such as heat treatment.
- the polystyrene-equivalent weight average molecular weight by gel permeation chromatography (GPC) is high, and from the viewpoint of obtaining a crosslinked rubber having excellent low heat generation and abrasion resistance.
- GPC gel permeation chromatography
- the weight average molecular weight of the modified conjugated diene polymer is a value obtained from the maximum peak molecular weight of the GPC curve measured by GPC after the reaction between the conjugated diene polymer having an active terminal and the compound [A].
- the peak area of the peak of the GPC curve is 2 times or more of the peak top molecular weight of the smallest molecular weight relative to the whole AL.
- the ratio AT / AL of the area AT of the peak portion indicating the peak top molecular weight (hereinafter, also referred to as “coupling rate of two or more branches”) is preferably 40% or more. When the ratio is 40% or more, it is preferable that a crosslinked rubber having sufficiently high strength and better fuel efficiency can be obtained. From this point of view, the coupling rate of two or more branches is more preferably 45% or more, further preferably 50% or more, and particularly preferably 60% or more.
- the coupling ratio of two or more branches is, for example, 99% or less, preferably 90% or less.
- the peak top molecular weight of the peak having the smallest molecular weight measured by GPC after the reaction of the conjugated diene polymer having an active terminal with the compound [A] is preferably 5.0 ⁇ 10 4 to 2.0 ⁇ 10.
- the range of 6 is more preferable, the range of 8.0 ⁇ 10 4 to 1.5 ⁇ 10 6 is more preferable, and the range of 1.0 ⁇ 10 5 to 1.2 ⁇ 10 6 is more preferable.
- the reaction between the conjugated diene-based polymer having an active terminal and the C ⁇ N group is prioritized, and the number of branches of the conjugated diene-based polymer chain is increased while the residual hydrocarbyl is increased. It is considered that the number of oxysilyl groups can be increased. It is considered that, as a result, the interaction between the modified conjugated diene polymer and silica was improved, and the crosslinked product obtained using the modified conjugated diene polymer exhibited excellent low heat buildup.
- a modified conjugated diene-based polymer represented by the following formula (3) is obtained.
- R 1 and R 2 are independently hydrogen atoms or hydrocarbyl groups having 1 to 8 carbon atoms, respectively, or R 1 and R 2 are combined with each other to form R 1 and R 2.
- R 5 and R 6 represents a ring structure composed of 5 to 8 carbon atoms together with the carbon atom bonded to are either each independently a hydrogen atom or a hydrocarbyl group having 1 to 8 carbon atoms, or, R 5 and R 6 represents a ring structure having 5 to 8 carbon atoms in which R 5 and R 6 are combined with each other and formed together with a carbon atom to which R 5 and R 6 are bonded.
- R 1 and R 2 do not become hydrogen atoms at the same time
- R 5 and R 6 does not become a hydrogen atom at the same time.
- R 3 and R 4 are independently hydrocarbylene groups having 1 to 6 carbon atoms
- R 7 is a hydrocarbylene group having 1 to 10 carbon atoms.
- Z 1 is a hydrocarbyloxy group having 1 to 4 carbon atoms, or a modified or unmodified conjugated diene polymer chain
- Z 2 and Z 3 Is independently a hydrocarbyl group having 1 to 4 carbon atoms, a hydrocarbyloxy group having 1 to 4 carbon atoms, or a modified or unmodified conjugated diene polymer chain
- M represents an integer of 1 to 3. In the formula, when m is 2 or 3, a plurality of R 3 , R 7 , Z 1 , Z 2 and Z 3 are the same group or different groups, respectively.
- the description of the above formula (1) is applied to R 1 to R 7 and m.
- the description of X 1 to X 3 in the above formula (1) is applied.
- Z 1 to Z 3 are hydrocarbyloxy groups
- Z 1 to Z 3 are preferably ethoxy groups or methoxy groups.
- the conjugated diene-based polymer chain of Z 1 to Z 3 and the conjugated diene-based polymer chain (Poly) in the formula (3) correspond to the conjugated diene-based polymer having an active terminal obtained in the above-mentioned polymerization step. It is a structure.
- conjugated diene polymer chains may have a functional group that interacts with silica at the end of the polymer chain.
- the functional group that the conjugated diene-based polymer chain has at the end is preferably a nitrogen-containing group from the viewpoint that the effect of improving the fuel economy performance of the crosslinked rubber is high.
- the polymer composition of the present disclosure contains the above-mentioned modified conjugated diene polymer, silica and a cross-linking agent.
- the content ratio of the modified conjugated diene polymer in the polymer composition is preferably 10% by mass or more, more preferably 20% by mass or more, with respect to the total amount of the polymer composition, 25 It is more preferably mass% or more. Further, in the polymer composition, the content ratio of the modified conjugated diene polymer is preferably 50% by mass or less, more preferably 40% by mass or less.
- silica examples include wet silica (hydrous silicic acid), dry silica (silicic anhydride), colloidal silica, precipitated silica, calcium silicate, aluminum silicate and the like.
- wet silica is particularly preferable from the viewpoint of improving the fracture characteristics and the effect of achieving both wet grip and low rolling resistance.
- high dispersible (High Dispersible Type) silica from the viewpoint that the dispersibility in the polymer composition can be improved and the physical properties and processability can be improved.
- silica can be used individually by 1 type or in combination of 2 or more types.
- various reinforcing fillers such as carbon black, clay, and calcium carbonate may be blended in the polymer composition as a filler.
- Preferred is silica alone or a combination of carbon black and silica.
- the total amount of silica and carbon black in the polymer composition is preferably 20 to 130 parts by mass, more preferably 25 to 110 parts by mass, relative to 100 parts by mass of the total amount of the polymer components contained in the polymer composition. It is a department.
- cross-linking agent examples include sulfur, sulfur halides, organic peroxides, quinone dioximes, organic polyvalent amine compounds, alkylphenol resins having a methylol group, and sulfur is usually used.
- the blending amount of sulfur is preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 3 parts by mass with respect to 100 parts by mass of the total amount of the polymer components contained in the polymer composition.
- the polymer composition of the present disclosure may contain other rubber components in addition to the modified conjugated diene-based polymer obtained above.
- the type of the rubber component is not particularly limited, but butadiene rubber (BR, for example, high cis BR having 90% or more of cis-1,4 bonds, BR containing syndiotactic-1,2-polybutadiene (SPB), etc.), styrene butadiene rubber (SBR), natural rubber (NR), isoprene rubber (IR), styrene isoprene copolymer rubber, butadiene isoprene copolymer rubber and the like can be mentioned, and BR and SBR are more preferable.
- the content ratio of the other rubber component in the polymer composition is preferably 60% by mass or less and 50% by mass or less with respect to the total amount of the modified conjugated diene polymer and the other rubber component. Is more preferable.
- the polymer composition may contain a process oil generally used for oil spreading the elastomer as an oil for oil spreading.
- the process oil is blended with the rubber composition, for example, by directly adding the oil during rubber blending.
- Preferred process oils include various oils known in the art, such as aromatic oils, paraffin oils, naphthenic oils, vegetable oils, and oils with a low content of polycyclic aromatic compounds (low).
- PCA oil for example, mild extraction solvent (MES: mild extraction solve), oil treated with aromatic extract from distillate oil (TDAE: treated distillate aromatic extract), special aromatic extraction from residual oil. Examples include products (SRAE: special residual aromatic extract) and heavy naphthenic oils.
- MES MES
- TDAE TDAE
- SRAE SRAE
- the blending amount of the process oil is preferably 10 to 100 parts by mass with respect to 100 parts by mass of the total amount of the polymer components contained in the polymer composition.
- an antioxidant for example, an antioxidant, zinc white, stearic acid, a softening agent, sulfur, a vulcanization accelerator, a silane coupling agent, a compatibilizing agent, a vulcanization aid, a processing agent.
- the polymer composition of the present disclosure in addition to the polymer component, silica and the cross-linking agent, components to be blended as necessary are mixed in an open kneader (for example, a roll) and a closed kneader (for example, a Banbury mixer). It can be applied to various rubber products as a crosslinked product by kneading with a kneader such as, etc., and cross-linking (vulcanizing) after molding.
- an open kneader for example, a roll
- a closed kneader for example, a Banbury mixer
- the crosslinked product is used for tires such as tire treads, undertreads, carcasses, sidewalls and beads; sealing materials such as packings, gaskets, weather strips and O-rings; automobiles, ships, aircraft, Interior/exterior skin materials for various vehicles such as railways; building materials; anti-vibration rubbers for industrial machinery and equipment; various hoses and hose covers such as diaphragms, rolls, radiator hoses, air hoses; power transmission belts Belts such as; lining; dust boots; materials for medical equipment; fenders; insulating materials for electric wires; other industrial products.
- tires such as tire treads, undertreads, carcasses, sidewalls and beads
- sealing materials such as packings, gaskets, weather strips and O-rings
- automobiles ships, aircraft, Interior/exterior skin materials for various vehicles such as railways; building materials; anti-vibration rubbers for industrial machinery and equipment; various hoses and hose covers such as diaphragms, rolls, radiator hoses
- the polymer composition containing the modified conjugated diene polymer of the present disclosure can be particularly suitably used as a material for tire treads, sidewalls, or both.
- the tires can be manufactured according to the usual method.
- the polymer composition is mixed with a kneader, and the sheet is arranged in a predetermined position (for example, outside the carcass in the case of a sidewall) according to a conventional method and vulcanized to form a tread. It is formed as rubber or sidewall rubber, and a pneumatic tire is obtained.
- Coupling rate (%) of two or more branches The area ratio of the peak portion showing the peak top molecular weight of at least twice the peak top molecular weight of the peak having the smallest molecular weight to 100% of the total area derived from the polymer of the GPC curve.
- the coupling rate was two or more branches.
- the polymerization was carried out under adiabatic conditions and the maximum temperature reached 85 ° C.
- the polymerization conversion rate reached 99% (after 20 minutes from the initiation of polymerization)
- 20 g of 1,3-butadiene was added over 10 minutes, and then N,N-bis(2-( 1.82 mmol of ((E)-4-methylpentan-2-ylidene)amino)ethyl)-3-(triethoxysilyl)propan-1-amine (a compound represented by the following formula (1-4)) was added.
- the reaction was carried out for 15 minutes.
- 3.52 g of 2,6-di-tert-butyl-p-cresol was added.
- the polymer solution of a polymer solution having a rubber content of 200 g was subjected to polymer coagulation in 2000 g of methanol and desolvated by steam stripping, and dried with a heat roll adjusted to 110 ° C. to obtain a modified conjugated diene polymer i. It was.
- Various physical properties and the like of the obtained modified conjugated diene polymer i are shown in Table 1 below.
- Example 2 Synthesis of modified conjugated diene polymer ii and physical properties thereof Instead of 3.87 mmol of n-butyllithium as a polymerization initiator, ((2E,6E)-11-(dimethylamino)-3,7-dimethylundeca-2,6-dien-1-yl)lithium (the following formula: A modified conjugated diene polymer ii was obtained in the same manner as in Example 1 except that 3.87 mmol of the compound represented by (2-1) was added. Table 1 below shows various physical property values of the obtained modified conjugated diene polymer ii.
- -Initiator 1 n-butyllithium-Initiator 2: ((2E,6E)-11-(dimethylamino)-3,7-dimethylundeca-2,6-dien-1-yl)lithium-Modifier 1: N,N-bis(2-(((E)-4-methylpentan-2-ylidene)amino)ethyl)-3-(triethoxysilyl)propan-1-amine/Modifier 2: dimethyldichlorosilane
- a modified conjugated diene polymer), butadiene rubber, spreading oil, silica, carbon black, a silane coupling agent, stearic acid, an antioxidant and zinc oxide were blended and kneaded.
- the formulation obtained above was cooled to room temperature, sulfur and a vulcanization accelerator were added, and the mixture was kneaded.
- the obtained rubber composition was molded and vulcanized at 160° C. for a predetermined time by a vulcanizing press to obtain a crosslinked rubber (vulcanized rubber).
- the tensile strength and rolling resistance were evaluated as follows. The results are shown in Table 3 below.
- the rubber compositions of Examples 1 and 2 have 300% modulus (tensile strength) and 70 ° C. tan ⁇ as compared with the rubber compositions of Comparative Example 1 and Comparative Example 2. There was a big improvement. From these results, it was confirmed that the modified conjugated diene polymer obtained by using the compound [A] as a modifier can obtain a crosslinked rubber having good rolling resistance (fuel efficiency) and tensile strength. Was done.
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Abstract
Description
[2] 活性末端を有する共役ジエン系重合体と、上記式(1)で表される化合物[A]との反応生成物である、変性共役ジエン系重合体。
[3]上記[1]の製造方法により得られる変性共役ジエン系重合体又は上記[2]の変性共役ジエン系重合体と、シリカと、架橋剤とを含む重合体組成物。
[4]上記[3]の重合体組成物を架橋させてなる架橋体。
[5]上記[3]の重合体組成物を用いて、少なくともトレッド又はサイドウォールが形成されたタイヤ。
本工程は、共役ジエン化合物を含むモノマーを重合して、活性末端を有する共役ジエン系重合体を得る工程である。重合に使用する共役ジエン化合物としては、例えば1,3-ブタジエン、イソプレン、2,3-ジメチル-1,3-ブタジエン、1,3-ペンタジエン、1,3-ヘキサジエン、1,3-ヘプタジエン、2-フェニル-1,3-ブタジエン、3-メチル-1,3-ペンタジエン、2-クロロ-1,3-ブタジエン等が挙げられる。これらの中でも、1,3-ブタジエン、イソプレン、2,3-ジメチル-1,3-ブタジエンが好ましい。
Y1について、共役ジエン化合物及び芳香族ビニル化合物としてはそれぞれ、重合に使用するモノマーとして例示した化合物を用いることができる。これらのうち、Y1は、1,3-ブタジエン、イソプレン、2,3-ジメチル-1,3-ブタジエン又はスチレンの重合により得られるヒドロカルビレン基であることが好ましく、イソプレンの重合により得られるヒドロカルビレン基であることが特に好ましい。Y1の重合度は、好ましくは2~10であり、より好ましくは2~4である。M1は、リチウム、ナトリウム、カリウム等が挙げられ、好ましくはリチウムである。
上記式(2)で表される化合物としては、これらの中でも、((2E,6E)-11-(ジメチルアミノ)-3,7-ジメチルウンデカ-2,6-ジエン-1-イル)リチウムを好ましく用いることができる。
本工程では、上記重合工程で得られた共役ジエン系重合体が有する活性末端と、下記式(1)で表される化合物[A]とを反応させる。化合物[A]を末端変性剤として用いることにより、重合体鎖の分岐数が2以上であり、かつシリカと相互作用する基で変性された変性共役ジエン系重合体を得ることができる。
R7としては、炭素数1~10のアルカンジイル基、炭素数3~10のシクロアルキレン基、炭素数2~10のアルケンジイル基、炭素数6~10のアリーレン基等が挙げられる。これらのうち、R7は、炭素数1~10の直鎖状又は分岐状のアルカンジイル基が好ましい。
X1~X3の炭素数1~4のヒドロカルビルオキシ基としては、メトキシ基、エトキシ基、プロポキシ基、イソプロポキシ基、ブトキシ基等が挙げられる。X2及びX3の炭素数1~4のヒドロカルビル基としては、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基等が挙げられる。X2及びX3は、架橋ゴムの低燃費性能をより良好にする観点から、少なくとも一方がヒドロカルビルオキシ基であることが好ましく、共にヒドロカルビルオキシ基であることがより好ましい。
mは、本開示の変性共役ジエン系重合体を用いて得られるゴム組成物の加工性の低下を抑制する観点から、1又は2が好ましく、1がより好ましい。
本開示の重合体組成物は、上記の変性共役ジエン系重合体、シリカ及び架橋剤を含有する。重合体組成物における上記変性共役ジエン系重合体の含有割合は、重合体組成物の全体量に対して、10質量%以上であることが好ましく、20質量%以上であることがより好ましく、25質量%以上であることがさらに好ましい。また、重合体組成物において、上記変性共役ジエン系重合体の含有割合は、好ましくは50質量%以下、より好ましくは40質量%以下である。
・ビニル含量(%):400MHzの1H-NMRによって測定した。
・結合スチレン含量(%):400MHzの1H-NMR測定によって測定した。
・重量平均分子量(Mw):ゲルパーミエーションクロマトグラフィー(GPC)により、ポリスチレン換算の分子量に基づくチャートを得て、そのチャートに基づいて求めた。GPCの具体的な測定条件は以下の通りである。
(GPC測定条件)
測定器:HLC-8020(東ソー社製)
カラム:GMH-HR-H(東ソー社製)2本を直列に連結した
検出器:示差屈折計RI-8020(東ソー社製)
溶離液:テトラヒドロフラン
カラム温度:40℃
流速:1.0ml/分
サンプル濃度:10mg/20ml
・ムーニー粘度(ML1+4,100℃):JIS K6300-1:2013に準拠し、Lローターを使用して、予熱1分、ローター作動時間4分、温度100℃の条件で求めた。
・2分岐以上のカップリング率(%):GPC曲線の重合体由来の全面積100%に対する、分子量が最も小さいピークのピークトップ分子量の2倍以上のピークトップ分子量を示すピーク部分の面積比を2分岐以上のカップリング率とした。
[実施例1 変性共役ジエン系重合体iの合成及びその物性]
窒素置換された内容積5リットルのオートクレーブ反応器に、シクロヘキサン1600g、2,2-ジ(テトラヒドロフリル)プロパン1.96mmol、スチレン108g及び1,3-ブタジエン272gを仕込んだ。反応器の内容物の温度を10℃に調整した後、重合開始剤としてn-ブチルリチウム3.87mmolを添加して重合を開始した。重合は断熱条件で実施し、最高温度は85℃に達した。重合転化率が99%に達した時点で(重合開始から20分経過後に)、1,3-ブタジエン20gを10分間かけて追加し、その後、末端変性剤としてN,N-ビス(2-(((E)-4-メチルペンタン-2-イリデン)アミノ)エチル)-3-(トリエトキシシリル)プロパン-1-アミン(下記式(1-4)で表される化合物) 1.82mmolを加えて15分間反応を行った。得られた変性共役ジエン系重合体を含有する重合体溶液に、2,6-ジ-tert-ブチル-p-クレゾールを3.52g添加した。次いで、2000gのメタノール中でゴム分200gの重合体溶液のポリマー凝固とスチームストリッピングによる脱溶媒を行い、110℃に調温された熱ロールで乾燥することにより変性共役ジエン系重合体iを得た。得られた変性共役ジエン系重合体iの各種物性値等を下記表1に示す。
重合開始剤としてn-ブチルリチウム3.87mmolの代わりに((2E,6E)-11-(ジメチルアミノ)-3,7-ジメチルウンデカ-2,6-ジエン-1-イル)リチウム(下記式(2-1)で表される化合物)を3.87mmol添加した以外は実施例1と同様にして変性共役ジエン系重合体iiを得た。得られた変性共役ジエン系重合体iiの各種物性値等を下記表1に示す。
重合開始剤としてのn-ブチルリチウム添加量を1.94mmolとし、また、末端変性剤に代えて停止剤としてオクタノール3.63mmolを加えて15分間反応を行ったこと以外は実施例1と同様の手順で重合体の合成を行い、未変性の共役ジエン系重合体iiiを得た。得られた共役ジエン系重合体iiiの各種物性値等を下記表1に示す。
末端変性剤としてN,N-ビス(2-(((E)-4-メチルペンタン-2-イリデン)アミノ)エチル)-3-(トリエトキシシリル)プロパン-1-アミン 1.82mmolに代えて、ジメチルジクロロシラン 1.82mmolを加えて、15分間反応を行ったこと以外は実施例1と同様の手順で重合体の合成を行い、変性共役ジエン系重合体ivを得た。得られた変性共役ジエン系重合体ivの各種物性値等を下記表1に示す。
・開始剤1:n-ブチルリチウム
・開始剤2:((2E,6E)-11-(ジメチルアミノ)-3,7-ジメチルウンデカ-2,6-ジエン-1-イル)リチウム
・変性剤1:N,N-ビス(2-(((E)-4-メチルペンタン-2-イリデン)アミノ)エチル)-3-(トリエトキシシリル)プロパン-1-アミン
・変性剤2:ジメチルジクロロシラン
上記で製造した(変性)共役ジエン系重合体i~ivをそれぞれ用いて、下記表2に示す配合処方により各成分を配合し、これを混練りすることによってゴム組成物を製造した。混練りは以下の方法で行った。温度制御装置を付属したプラストミル(内容量:250ml)を使用し、まず一段目の混練りとして、充填率72%、回転数60rpmの条件で、変性共役ジエン系重合体(比較例1については未変性の共役ジエン系重合体)、ブタジエンゴム、伸展油、シリカ、カーボンブラック、シランカップリング剤、ステアリン酸、老化防止剤及び酸化亜鉛を配合して混練りした。次いで、二段目の混練りとして、上記で得た配合物を室温まで冷却後、硫黄及び加硫促進剤を配合し、混練りした。得られたゴム組成物を成型し、160℃で所定時間、加硫プレスにて加硫して、架橋ゴム(加硫ゴム)を得た。また、以下のようにして引張強度及び転がり抵抗性を評価した。結果を下記表3に示す。
(1)引張強度:架橋ゴムを測定用試料とし、JIS K6251:2010に従って300%モジュラス(M300)を測定した。測定結果については、比較例1を100とした指数で示し、数値が大きいほど引張強度が高く、良好であることを示す。
(2)転がり抵抗性(70℃tanδ):架橋ゴムを測定用試料とし、ARES-RDA(TA Instruments社製)を使用し、剪断歪1.0%、角速度100ラジアン毎秒、70℃の条件で測定した。測定結果については、比較例1を100とした指数で示し、数値が大きいほどエネルギロスが小さく、転がり抵抗性(低燃費性能)が良好であることを示す。
*1:JSR社製 BR01、*2:ジャパンエナジー社製 JOMOプロセスNC-140、*3:ローディア社製 ZEOSIL 1165MP、*4:三菱化学社製 ダイアブラックN339、*5:エボニック社製 Si75、*6:精工化学社製 オゾノン6C、*7:大内新興化学工業社製 ノクセラーD、*8:大内新興化学工業社製 ノクセラーCZ。
Claims (10)
- 共役ジエン化合物を含むモノマーをアルカリ金属化合物の存在下で重合して得られる、活性末端を有する共役ジエン系重合体と、下記式(1)で表される化合物[A]と、を反応させる、変性共役ジエン系重合体の製造方法。
- 前記アルカリ金属化合物に占める、上記式(2)で表される化合物の使用割合が、50モル%以上である、請求項2に記載の変性共役ジエン系重合体の製造方法。
- 前記アルカリ金属化合物は、上記式(2)で表される化合物として、((2E,6E)-11-(ジメチルアミノ)-3,7-ジメチルウンデカ-2,6-ジエン-1-イル)リチウムを含む、請求項2又は3に記載の変性共役ジエン系重合体の製造方法。
- 前記モノマーが芳香族ビニル化合物を更に含む、請求項1~4のいずれか一項に記載の変性共役ジエン系重合体の製造方法。
- 活性末端を有する共役ジエン系重合体と、下記式(1)で表される化合物と、の反応生成物である、変性共役ジエン系重合体。
- 下記式(3)で表される変性共役ジエン系重合体。
- 請求項1~5のいずれか一項に記載の製造方法により得られる変性共役ジエン系重合体、又は請求項6若しくは7に記載の変性共役ジエン系重合体と、シリカと、架橋剤とを含む重合体組成物。
- 請求項8に記載の重合体組成物を架橋させてなる架橋体。
- 請求項8に記載の重合体組成物を用いて、少なくともトレッド又はサイドウォールが形成されたタイヤ。
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