WO2021172938A1 - 변성 공액디엔계 중합체, 이의 제조방법 및 이를 포함하는 고무 조성물 - Google Patents
변성 공액디엔계 중합체, 이의 제조방법 및 이를 포함하는 고무 조성물 Download PDFInfo
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- WO2021172938A1 WO2021172938A1 PCT/KR2021/002463 KR2021002463W WO2021172938A1 WO 2021172938 A1 WO2021172938 A1 WO 2021172938A1 KR 2021002463 W KR2021002463 W KR 2021002463W WO 2021172938 A1 WO2021172938 A1 WO 2021172938A1
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- WO
- WIPO (PCT)
- Prior art keywords
- conjugated diene
- polymerization
- polymer
- carbon atoms
- modified conjugated
- Prior art date
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- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229920003211 cis-1,4-polyisoprene Polymers 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000012888 cubic function Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- BOTLEXFFFSMRLQ-UHFFFAOYSA-N cyclopentyloxycyclopentane Chemical compound C1CCCC1OC1CCCC1 BOTLEXFFFSMRLQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 1
- GSYVJAOBRKCNOT-UHFFFAOYSA-N diethoxymethyl-[3-[3-(diethoxymethylsilyl)propyltetrasulfanyl]propyl]silane Chemical compound CCOC(OCC)[SiH2]CCCSSSSCCC[SiH2]C(OCC)OCC GSYVJAOBRKCNOT-UHFFFAOYSA-N 0.000 description 1
- OTYYPJUYBNMEFR-UHFFFAOYSA-N dimethoxymethyl-[3-[4-[3-(dimethoxymethylsilyl)propyl]piperazin-1-yl]propyl]silane Chemical compound COC(OC)[SiH2]CCCN1CCN(CC1)CCC[SiH2]C(OC)OC OTYYPJUYBNMEFR-UHFFFAOYSA-N 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 1
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 description 1
- 235000019285 ethoxyquin Nutrition 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 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
- 238000011049 filling Methods 0.000 description 1
- ZONYXWQDUYMKFB-UHFFFAOYSA-N flavanone Chemical compound O1C2=CC=CC=C2C(=O)CC1C1=CC=CC=C1 ZONYXWQDUYMKFB-UHFFFAOYSA-N 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229920005555 halobutyl Polymers 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- AFRJJFRNGGLMDW-UHFFFAOYSA-N lithium amide Chemical compound [Li+].[NH2-] AFRJJFRNGGLMDW-UHFFFAOYSA-N 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
- CETVQRFGPOGIQJ-UHFFFAOYSA-N lithium;hexane Chemical compound [Li+].CCCCC[CH2-] CETVQRFGPOGIQJ-UHFFFAOYSA-N 0.000 description 1
- NRUBUZBAZRTHHX-UHFFFAOYSA-N lithium;propan-2-ylazanide Chemical compound [Li+].CC(C)[NH-] NRUBUZBAZRTHHX-UHFFFAOYSA-N 0.000 description 1
- SZAVVKVUMPLRRS-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].C[CH-]C SZAVVKVUMPLRRS-UHFFFAOYSA-N 0.000 description 1
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 description 1
- 238000010551 living anionic polymerization reaction Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- HQHSMYARHRXIDS-UHFFFAOYSA-N n,n-dimethyl-1-phenylprop-2-en-1-amine Chemical compound CN(C)C(C=C)C1=CC=CC=C1 HQHSMYARHRXIDS-UHFFFAOYSA-N 0.000 description 1
- ZUHZZVMEUAUWHY-UHFFFAOYSA-N n,n-dimethylpropan-1-amine Chemical compound CCCN(C)C ZUHZZVMEUAUWHY-UHFFFAOYSA-N 0.000 description 1
- IPJPAQIHUIKFLV-UHFFFAOYSA-N n-trimethylsilylaniline Chemical compound C[Si](C)(C)NC1=CC=CC=C1 IPJPAQIHUIKFLV-UHFFFAOYSA-N 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
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- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- KWCVEHLUMGRVKR-UHFFFAOYSA-N tributoxy-[3-[1-(3-tributoxysilylpropyl)-2,4-dihydropyrimidin-3-yl]propyl]silane Chemical compound CCCCO[Si](OCCCC)(OCCCC)CCCN1CC=CN(CCC[Si](OCCCC)(OCCCC)OCCCC)C1 KWCVEHLUMGRVKR-UHFFFAOYSA-N 0.000 description 1
- ASAOXGWSIOQTDI-UHFFFAOYSA-N triethoxy-[2-(2-triethoxysilylethyltetrasulfanyl)ethyl]silane Chemical compound CCO[Si](OCC)(OCC)CCSSSSCC[Si](OCC)(OCC)OCC ASAOXGWSIOQTDI-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 group 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
- QKJGTZOWMVHEHS-UHFFFAOYSA-N triethoxy-[3-(phenyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSC1=CC=CC=C1 QKJGTZOWMVHEHS-UHFFFAOYSA-N 0.000 description 1
- YCPSFZKDECDJSP-UHFFFAOYSA-N triethoxy-[3-[3-(3-triethoxysilylpropyl)imidazolidin-1-yl]propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCN1CCN(CCC[Si](OCC)(OCC)OCC)C1 YCPSFZKDECDJSP-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
- MSNMNSJOGBUEDQ-UHFFFAOYSA-N trimethoxy-[3-[3-(3-trimethoxysilylpropyl)-1,3-diazinan-1-yl]propyl]silane Chemical compound CO[Si](OC)(OC)CCCN1CCCN(CCC[Si](OC)(OC)OC)C1 MSNMNSJOGBUEDQ-UHFFFAOYSA-N 0.000 description 1
- XNWCJGVZGOCGBT-UHFFFAOYSA-N trimethoxy-[3-[4-(3-trimethoxysilylpropyl)piperazin-1-yl]propyl]silane Chemical compound CO[Si](OC)(OC)CCCN1CCN(CCC[Si](OC)(OC)OC)CC1 XNWCJGVZGOCGBT-UHFFFAOYSA-N 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and 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
- C08F36/04—Homopolymers and 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
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- C08C19/22—Incorporating nitrogen atoms into the molecule
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- 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
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- 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
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
- C08F297/04—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
-
- 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
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- C08F2/001—Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
- C08F212/10—Styrene with nitriles
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- 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
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- C08K13/02—Organic and inorganic ingredients
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- C08K3/36—Silica
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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- C08F2810/00—Chemical modification of a polymer
- C08F2810/50—Chemical modification of a polymer wherein the polymer is a copolymer and the modification is taking place only on one or more of the monomers present in minority
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- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C08K5/544—Silicon-containing compounds containing nitrogen
Definitions
- the present invention relates to a modified conjugated diene-based polymer having excellent rotation resistance and improved processability, a method for preparing the same, and a rubber composition comprising the same.
- a conjugated diene-based polymer having low rolling resistance, excellent abrasion resistance and tensile properties, and adjustment stability typified by wet road resistance is required as a rubber material for tires.
- conjugated diene polymers or copolymers such as styrene-butadiene rubber (hereinafter referred to as SBR) or butadiene rubber (hereinafter referred to as BR) have been manufactured by emulsion polymerization or solution polymerization and are used as rubber for tires. .
- SBR styrene-butadiene rubber
- BR butadiene rubber
- the greatest advantage of solution polymerization compared to emulsion polymerization is that the content of vinyl structure and styrene content defining rubber properties can be arbitrarily adjusted, and molecular weight and physical properties can be adjusted by coupling or modification. that it can be adjusted. Therefore, it is easy to change the structure of the finally manufactured SBR or BR, and it is possible to reduce the movement of the chain ends by bonding or modifying the chain ends, and to increase the binding force with fillers such as silica or carbon black. It is widely used as a rubber material for
- the solution polymerization SBR is prepared by using an anionic polymerization initiator, and a technique of introducing a functional group at the end by binding or modifying the chain end of the formed polymer using various modifiers is used.
- U.S. Patent No. 4,397,994 discloses a technique in which an active anion at the chain end of a polymer obtained by polymerizing styrene-butadiene in a non-polar solvent using alkyllithium, a monofunctional initiator, is combined using a binder such as a tin compound. did.
- the solution-polymerized SBR is generally advantageous to have a broad molecular weight distribution in terms of improving compounding processability, and a method of preparing it by high-temperature polymerization or introducing a long-chain branch using a coupling agent has been attempted, but in the case of high-temperature polymerization, the molecular weight distribution is Although widening, the denaturation rate is low, and when a coupling agent is used, there is a problem in that rotation resistance is lowered due to steric hindrance between the coupling agent and the filler.
- Patent Document 1 US Patent No. 4,397,994
- the present invention has been devised to solve the problems of the prior art, and a repeating unit derived from a conjugated diene-based monomer; And it aims to provide a modified conjugated diene-based polymer comprising a functional group derived from a modifier, and having excellent filler affinity and processability satisfying the conditions (i) to (vii).
- the present invention uses an oligomer having an anionic active terminus as a polymerization initiator, and in the preparation of the active polymer, the polymerization initiator is divided at least twice according to the polymerization conversion rate to carry out the polymerization reaction under conditions (i) to (vii)
- An object of the present invention is to provide a method for producing a modified conjugated diene-based polymer capable of easily producing the above-mentioned modified conjugated diene-based polymer that simultaneously satisfies the above.
- an object of the present invention is to provide a rubber composition comprising the modified conjugated diene-based polymer.
- the present invention provides a repeating unit derived from a conjugated diene-based monomer; And it provides a modified conjugated diene-based polymer comprising a functional group derived from a modifier, and satisfying the following conditions (i) to (vii):
- Equation 1 the Mooney relaxation area (MLRA) measured at 100 ° C represented by the following Equation 1 is 1500 MU-s,
- A is the Mooney relaxation area (MLRA),
- k is the Mooney intercept 1 second after stopping the rotor operation of the Mooney viscometer
- a is the Mooney relaxation rate
- t f is the completion point of Mooney relaxation.
- the present invention comprises the steps of preparing an active polymer by polymerizing a conjugated diene-based monomer or a conjugated diene-based monomer and an aromatic vinyl-based monomer in a hydrocarbon solvent (S1); and a step (S2) of reacting or coupling the active polymer prepared in step (S1) with a modifier, wherein the polymerization in step (S1) initiates polymerization in the presence of a first polymerization initiator, and a polymerization conversion rate of 50% At least 95% or less, a second polymerization initiator is divided at least once to perform a polymerization reaction, and the first and second polymerization initiators are organometallic compounds, conjugated diene-based monomers and compounds represented by the following formula (1), respectively.
- step (S1) is continuously carried out in at least two polymerization reactors, wherein the polymerization conversion rate in the first reactor of the polymerization reactor is 10% to 50% It provides a method for producing the above-modified conjugated diene-based polymer:
- R 1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms
- R 2 is a single bond or an alkylene group having 1 to 20 carbon atoms unsubstituted or substituted with a single bond
- R 3 and R 4 are independently of each other substituted or unsubstituted with a substituent
- the present invention provides a rubber composition comprising the modified conjugated diene-based polymer and a filler.
- the modified conjugated diene-based polymer according to the present invention can have a high modification rate while having a wide molecular weight distribution by being prepared by the manufacturing method presented herein, and has excellent filler affinity by having a low-branching structure of a 2-arm structure While the processability can be excellent.
- the polymerization initiator is divided at least twice according to the polymerization conversion rate during the polymerization of the step (S1) of preparing an active polymer using an oligomer having an anionic active terminal as a polymerization initiator.
- the rubber composition according to the present invention includes the modified conjugated diene-based polymer, it has an excellent effect in balance between running resistance and processability.
- the term 'Mooney Large Relaxation Area (MLRA)' is a measure (measure) of chain relaxation within a molten polymer, where longer or branched polymer chains release more energy after removal of the applied strain. This suggests that it can be stored and requires a longer period of time to relax.
- the Mooney relaxation area of an ultra-high molecular weight or long-chain branched polymer may be greater than that of a polymer having a wider or narrower molecular weight compared to a polymer having the same Mooney viscosity.
- polymer' refers to a homopolymer compound or a copolymer compound prepared by polymerizing a kind of monomer or different kinds of monomers.
- the term '1,2-vinyl bond content' refers to 1,2-numbers in the polymer chain of the copolymer based on the portion (total amount of polymerized butadiene) derived from the conjugated diene-based monomer (butadiene, etc.) in the copolymer. Refers to the mass (or weight) percentage of butadiene contained in the position.
- 'styrene bond content' refers to the percentage by weight (or weight) of styrene contained in the chain of the copolymer derived from an aromatic vinylic monomer (styrene, etc.) in the copolymer.
- the term 'modification rate (%)' refers to the ratio of the modified copolymer chain to the unmodified copolymer chain when modified with a modifier for the copolymer having the polymerization active site. and it is expressed as a percentage (%) of the total copolymer including the modified copolymer chain and the unmodified copolymer chain.
- substitution' may mean that hydrogen of a functional group, atomic group, or compound is substituted with a specific substituent, and when hydrogen of a functional group, atomic group or compound is substituted with a specific substituent, within the functional group, atomic group or compound
- One or two or more plural substituents may be present depending on the number of hydrogens present, and when plural substituents are present, each substituent may be the same as or different from each other.
- 'alkyl group' may refer to a monovalent aliphatic saturated hydrocarbon, and may include linear alkyl groups such as methyl, ethyl, propyl and butyl; branched alkyl groups such as isopropyl, sec-butyl, tert-butyl and neo-pentyl; and cyclic saturated hydrocarbons, or cyclic unsaturated hydrocarbons including one or two or more unsaturated bonds.
- 'alkylene group' may mean a divalent aliphatic saturated hydrocarbon such as methylene, ethylene, propylene, and butylene.
- 'cycloalkyl group' may mean a cyclic saturated hydrocarbon.
- 'aryl group' may mean an aromatic hydrocarbon, and also a monocyclic aromatic hydrocarbon in which one ring is formed, or a polycyclic aromatic hydrocarbon in which two or more rings are bonded. may be meant to include all of them.
- 'aralkyl' is also called aralkyl, and may refer to a combination group of an alkyl group and an aryl group formed by substituting an aryl group in which a hydrogen atom bonded to a carbon constituting the alkyl group is substituted.
- the term 'single bond' may refer to a single covalent bond that does not include a separate atom or molecular group.
- the terms 'derived unit', 'derived repeating unit' and 'derived functional group' may refer to a component, structure, or substance itself derived from a certain substance.
- '1,2-vinyl bond content' and 'styrene bond content' measure the vinyl (Vinyl) content and styrene content in the copolymer and the first and second copolymer units using Varian VNMRS 500 MHz NMR, it will be analyzed
- 1,1,2,2-tetrachloroethane was used as the solvent, and the sample was prepared by dissolving the polymer to 0.02 M in the solvent.
- Solvent peak is calculated as 6.0 ppm, 7.2 ⁇ 6.9 ppm is random styrene, 6.9 ⁇ 6.2 ppm is block styrene, 5.8 ⁇ 5.1 ppm is 1,4-vinyl and 1,2-vinyl, 5.1 ⁇ 4.5 ppm is 1,2 Using the peak of -vinyl, the 1,2-vinyl bond content and the styrene defect content in the entire polymer were respectively calculated and measured.
- 'weight average molecular weight (Mw)', 'molecular weight distribution (MWD)' and 'unimodal characteristics' are measured by measuring molecular weight through gel permeation chromatograph (GPC) analysis and obtaining a molecular weight distribution curve.
- molecular weight distribution (PDI, MWD, Mw/Mn) is calculated from each of the measured molecular weights.
- the weight average molecular weight (Mw) and the number average molecular weight (Mn) were measured with Gel permeation chromatohraph (GPC) (PL GPC220, Agilent Technolodies) under the following conditions, and a molecular weight distribution curve was obtained, and molecular weight distribution (PDI, MWD, Mw/Mn) were calculated and obtained from each of the measured molecular weights.
- GPC Gel permeation chromatohraph
- 'denaturation rate (%)' is a value calculated according to Equation 2 below using a chromatogram obtained from chromatographic measurement, and the chromatographic measurement is, for example, GPC (Gel permeation chromatohraph) (PL GPC220, Agilent). Technolodies), the copolymer was dissolved in cyclohexane and a sample (prepared at 1.0 mg/ml) was stored in a mobile phase reservoir, and tetrahydrofuran (THF) was stored in another mobile phase reservoir.
- GPC Gel permeation chromatohraph
- Each of the mobile phase reservoirs was connected to a dual-head pump, and first, a solution of the mobile phase reservoir in which the copolymer was dissolved was injected into the column filled with the silica adsorbent through the pump and the injector having a loop volume of 100 ⁇ l. At this time, the pressure of the pump was 450 psi, and the injection flow rate was 0.7 ml/min. Then, it was confirmed from the detector (ELSD, Waters) that the unmodified copolymer unit in the copolymer was no longer detected, and based on 5 minutes from the start of the injection, the tetrahydrofuran was injected into the column through a pump.
- ELSD ELSD, Waters
- the pressure of the pump was 380 psi, and the injection flow rate was 0.7 ml/min.
- the denaturation rate (%) was calculated according to the following Equation 2 from the detected chromatogram results.
- the peak area of the unmodified copolymer unit is the peak area of the chromatogram for the first solution transferred to the detector
- the peak area of the modified copolymer unit is the second solution transferred to the detector is the peak area of the chromatogram for
- the 'nitrogen atomic content' may be measured through an NSX analysis method, and the NSX analysis method may be measured using a trace nitrogen quantitative analyzer (NSX-2100H).
- a trace nitrogen quantitative analyzer Auto sampler, Horizontal furnace, PMT & Nitrogen detector
- set the carrier gas flow rate to 250 ml/min for Ar, 350 ml/min for O 2 , and 300 ml/min for the ozonizer
- heater was set to 800°C and then waited for about 3 hours to stabilize the analyzer.
- a calibration curve in the range of 5 ppm, 10 ppm, 50 ppm, 100 ppm and 500 ppm was prepared using Nitrogen standard (AccuStandard S-22750-01-5 ml), and the area corresponding to each concentration was obtained. Afterwards, a straight line was drawn using the ratio of concentration to area. Thereafter, a ceramic boat containing 20 mg of the sample was placed on the auto sampler of the analyzer and measured to obtain an area. The nitrogen atom content was calculated using the area of the obtained sample and the calibration curve.
- the sample used in the NSX analysis method is a modified conjugated diene-based polymer sample obtained by removing the solvent by putting it in hot water heated with steam and stirring, and may be a sample from which residual monomers and residual denaturants are removed.
- oil if oil is added to the above sample, it may be a sample after oil is extracted (removed).
- the 'Moonie stress relaxation rate (-S/R)' was measured at 100° C. and a rotor speed of 2 ⁇ 0.02 rpm using a Large Rotor of Alpha Technologies MV2000E. Specifically, after leaving the polymer at room temperature (23 ⁇ 5°C) for more than 30 minutes, 27 ⁇ 3g is collected and filled in the die cavity, and the Mooney viscosity is measured for 4 minutes while applying torque by operating the platen. is obtained, and then the slope value of the Mooney viscosity change that appears as the torque is released is measured and expressed as an absolute value.
- the 'Mooney relaxation area (MLRA)' is a value calculated from Equation 1 by plotting a Mooney torque graph over time, and is a measure of the Mooney viscosity change that appears as the torque is released by stopping the rotor after measuring the Mooney viscosity.
- the absolute value of Mooney relaxation rate (a) is obtained, and it can be obtained from the integral of the Mooney relaxation curve for 120 seconds (t f ) from 1 second after the rotor stops (t o ), The integral value is calculated from Equation 1 above.
- the modified conjugated diene-based polymer according to the present invention may be manufactured by a manufacturing method to be described later, and may have a broad molecular weight distribution and highly modified ends.
- the modified conjugated diene-based polymer according to the present invention includes a repeating unit derived from a conjugated diene-based monomer and a functional group derived from a modifier, and satisfies the following conditions (i) to (vii):
- Equation 1 the Mooney relaxation area (MLRA) measured at 100 ° C represented by the following Equation 1 is 1500 MU-s,
- A is the Mooney relaxation area (MLRA),
- k is the Mooney intercept 1 second after stopping the rotor operation of the Mooney viscometer
- a is the Mooney relaxation rate
- t f is the completion point of Mooney relaxation.
- the modified conjugated diene-based polymer is obtained by applying an oligomer having an anionic active terminal as a polymerization initiator during the polymerization in step (S1) to be described later, thereby increasing the polymerization conversion rate in the first reactor by 10% to 50% It is prepared through a manufacturing method comprising the step (S1) performed while controlling the By being prepared through the above conditions (i) to (vii) can be simultaneously satisfied.
- the oligomer is prepared by reacting an organometallic compound, a conjugated diene-based monomer, and a compound represented by Formula 1, and may include a repeating unit derived from a compound represented by Formula 1 in a molecule, and thus the polymer separately from the modifier.
- the above condition (vii) can also be more easily satisfied by introducing the compound-derived unit represented by the formula (1).
- the modified conjugated diene-based polymer simultaneously satisfies the conditions (i) to (vii), so that mechanical properties such as tensile properties, viscoelasticity, and compounding processability can be excellent at the same time, and thus tensile properties, wet road resistance, rotation Resistance and processability may be excellent in a balance.
- the molecular weight distribution curve by gel permeation chromatography is unimodal, and the molecular weight distribution may be 2.0 or more, where the The unimodal curve shape and molecular weight distribution can be simultaneously satisfied by the manufacturing method described later.
- the modified conjugated diene-based polymer may have a molecular weight distribution curve of unimodal and a molecular weight distribution of 2.0 or more and 5.0 or less, or 2.0 or more and 3.0 or less.
- the modified conjugated diene-based polymer has a weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) of 100,000 g/mol to 2,000,000 g/mol, 150,000 g/mol to 1,800,000 g/mol , or 200,000 g/mol to 1,600,000 g/mol, within this range, the rolling resistance and the wet road resistance are more balanced and excellent.
- Mw weight average molecular weight measured by gel permeation chromatography
- the modified conjugated diene-based polymer may include a functional group derived from a modifier, and may have a modification rate of 70% or more, or 90% or more.
- the denaturant-derived functional group may refer to a functional group derived from the denaturant present at one end of the active polymer through a reaction or coupling between the active polymer and the denaturant.
- the denaturation rate may be affected by the extent to which denaturation or coupling occurs by the denaturant in the denaturation reaction, and the amount of denaturant added during manufacture, amount of polar additive, reaction time, and mixing time of denaturant and active polymer And it can be controlled according to the degree of mixing.
- the denaturation rate may also be affected by the polymerization initiator used in the preparation of the modified conjugated diene-based polymer, the timing of its reaction input, and the amount of its use.
- the modified conjugated diene-based polymer is continuously carried out in at least two polymerization reactors, the polymerization conversion rate in the first reactor is adjusted to 10% to 50%, and the polymerization initiator is divided at least twice to obtain the active polymer.
- It may be prepared by the manufacturing method described below, which includes a polymerization step to prepare and a modification step of reacting or coupling an active polymer and a modifier, and through this manufacturing method, the molecular weight distribution curve is unimodal and the molecular weight distribution is wide as 2.0 or more The denaturation rate of the numerical value as described above may be satisfied.
- the input of raw materials and the discharge of the reaction-completed product are continuously performed, and the polymerization chain is added and reacted from the start of the reaction, the polymerization chain formed by inputting from the middle of the reaction and the end of the polymerization
- polymer chains having various molecular weights with different reaction degrees are mixed with the discharged product, such as polymer chains formed by reacting with input to the reactor, but the raw materials introduced into the reactor at the same time generally undergo polymerization at a similar reaction rate to produce the product.
- the polymer chains in the product may have a similar level of molecular weight and may be in a unimodal form with a narrower molecular weight distribution than expected.
- the production method according to the present invention is a continuous polymerization method, wherein the polymerization conversion in the first reactor is adjusted to 10% to 50%, and the active polymer is prepared in a polymerization step in which the polymerization initiator is added in at least two divided portions.
- the number of polymer chains having molecular weights of various sizes having active sites with the modifier is absolutely greater than the number of polymer chains in the active polymer prepared from general continuous polymerization, and thus the same modifier It can exhibit a high modification rate compared to the modified conjugated diene-based polymer prepared by general continuous polymerization to which
- the modified conjugated diene-based polymer may have a Mooney Stress Relaxation Ratio measured at 100° C. of 0.7 or more and 3.0 or less, 0.8 or more and 2.0 or less, and more specifically, 0.9 or more and 1.5 or less.
- the Mooney stress relaxation rate can be used as an index of the branching structure (or linearity) of the polymer.
- the more branches there are, the smaller the Mooney stress relaxation rate. Can be used.
- the modified conjugated diene polymer according to the present invention satisfies the conditions (i) to (iv), (vi) and (vii) and at the same time has a Mooney stress relaxation rate in the above range, so that it has excellent processability and at the same time tensile properties and excellent viscoelastic properties.
- the modified conjugated diene-based polymer according to an embodiment of the present invention must satisfy that the Mooney viscosity measured under ASTM D1646 is 50 to 100, and specifically may be 70 to 100, preferably It may be 70 to 90 days. There may be various measures for evaluating the processability, but when the Mooney viscosity satisfies the above range, the processability may be quite excellent.
- the modified conjugated diene-based polymer may have a Mooney relaxation area (MLRA) of 1500 MU-s or less measured at 100° C. expressed by Equation 1 below.
- MLRA Mooney relaxation area
- A is the Mooney relaxation area (MLRA),
- k is the Mooney intercept 1 second after stopping the rotor operation of the Mooney viscometer
- a is the Mooney relaxation rate
- t f is the completion point of Mooney relaxation.
- the Mooney relaxation start time may indicate a time point 1 second after stopping the rotor operation, which may mean a time point when the Mooney torque has a value k.
- the Mooney relaxation completion point may indicate the completion point of the Mooney relaxation measurement in the Mooney relaxation measurement test. That is, t f -t o may represent the Mooney relaxation time.
- t o may be 1 second
- t f may be 80 seconds to 150 seconds.
- the Mooney relaxation area may be an integral area under the Mooney torque-relaxation time curve from 1 second to 80 seconds to 150 seconds.
- the t f may specifically be 90 seconds to 130 seconds, or 100 seconds to 120 seconds.
- the Mooney relaxation area is 1500 MU-s or less, it is a technical means to have excellent processability while having excellent tensile and viscoelastic properties. If the Mooney relaxation area is within the above range, the present invention can achieve the desired effect. In addition, when the Mooney relaxation area has a very small value, mechanical properties such as tensile properties may be lowered, and the present invention in terms of expressing excellent properties in both tensile properties and viscoelastic properties while having better workability
- the Mooney relaxation area of the modified conjugated diene-based polymer according to an embodiment may be 300 MU-s or more.
- the molecular weight and Mooney viscosity of the polymer are proportional to each other and show the same tendency to each other.
- the Mooney viscosity is high and thus processability is poor
- the Mooney viscosity is also It is low and relatively good in processability, but there is a problem in that mechanical properties such as tensile properties are poor.
- the modified conjugated diene-based polymer according to an embodiment of the present invention has a Mooney relaxation area of 1500 MU-s or less, processability and tensile properties are balanced and excellent.
- the Mooney relaxation area is used as an index of the degree of branching (or linearity) because the more branching, the greater the Mooney relaxation area when comparing polymers having the same Mooney viscosity. Also, the Mooney relaxation area may be different even if they have the same branching degree (or linearity).
- the modified conjugated diene-based polymer according to the present invention is prepared by the manufacturing method described below, so that the molecular weight, the rate of modification, and the degree of branching can be controlled at the same time, the molecular weight distribution curve is unimodal, the molecular weight distribution is wide, and the Mooney stress relaxation rate and Mooney relaxation area may be simultaneously adjusted, and as a result, conditions (i) to (vii) may be simultaneously satisfied.
- the Mooney relaxation area may be a value calculated from Equation 1 by plotting a Mooney torque graph over time, and in this case, the Mooney viscosity (MV, (ML1+4, @100° C.) MU) is MV-2000 ( ALPHA Technologies, Inc.) was used at 100°C with a Rotor Speed of 2 ⁇ 0.02 rpm and a Large Rotor was used, and the sample used at this time was left at room temperature (23 ⁇ 5°C) for more than 30 minutes and then 27 ⁇ 3 g was collected. This may be the value measured for 4 minutes by filling the die cavity with the platen and operating the platen.
- the absolute value of the Mooney relaxation rate (a) can be obtained by measuring the slope value of the change in Mooney viscosity appearing when the torque is released by stopping the rotor.
- the Mooney relaxation area can be obtained from the integral value of the Mooney relaxation curve for 120 seconds (t f ) from 1 second after the rotor stops (t o ), and this integral value can be calculated from Equation 1 have.
- RR rotational resistance
- the modified conjugated diene-based polymer may have a nitrogen atom content of 100 ppm or more, 100 ppm or more and 1,000 ppm or less, or 200 ppm or more and 500 ppm or less, based on the weight of the polymer, and the modified conjugated diene-based polymer within this range There is an excellent effect of mechanical properties such as tensile properties and viscoelastic properties of a rubber composition comprising a.
- the nitrogen atom may be derived from an oligomer to be described later, or derived from the oligomer and a denaturant, and may be prepared by the production method described later so that the nitrogen atom content may be relatively high.
- the modified conjugated diene-based polymer according to the present invention is prepared by the manufacturing method described below, controls the raw material (monomer) that is consumed by reacting at the initial stage of polymerization, and forms a new polymerization chain with the polymerization initiator to be divided, thereby derived from the polymerization initiator.
- a large amount of active polymer chains having nitrogen atoms and reactive active sites with a denaturant may be present, so that the nitrogen atom content in the polymer may be higher than that of conventional terminal ends and/or both ends.
- an active polymer is prepared by polymerizing a monomer in the presence of a polymerization initiator, and then reacted or coupled with a modifier to prepare a modified conjugated diene-based polymer, At this time, the active polymer is produced through a process in which the polymerization initiator and the monomer react to initiate polymerization, and then the terminal anion continues to react with the monomer and the polymer chain grows.
- the number of polymer chains generated is divided into the polymerization initiator according to a specific point in time to continuously generate new chains. It can only be limited compared to the manufacturing method according to the
- the polymerization initiator is dividedly injected at a specific time and at the same time the polymerization conversion rate in the first polymerization reactor is 10% to 50%, that is, the polymerization initial polymerization degree is adjusted to a specific range, so that the polymerization initiator is then dividedly injected.
- the modified conjugated diene-based polymer according to an embodiment of the present invention may contain a very large amount of a polymer chain including a nitrogen atom derived from an oligomer included in the polymerization initiator, It can have an absolutely increased nitrogen atom content compared to polymers prepared by other polymerization methods using the same polymerization initiator and/or modifier.
- the modified conjugated diene-based polymer may include a polymer chain including a repeating unit derived from a conjugated diene-based monomer and a functional group derived from a modifier included at at least one end of the polymer chain, wherein the The repeating unit derived from the conjugated diene-based monomer may mean a repeating unit formed during polymerization of the conjugated diene-based monomer, and the functional group derived from the modifier is active through a reaction or coupling between the active polymer prepared by polymerization of the conjugated diene-based monomer and the modifier. It may mean a functional group derived from a modifier present at one end of the polymer.
- the conjugated diene-based monomer is 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, piperylene, 3-butyl-1,3-octadiene, isoprene, 2 -Phenyl-1,3-butadiene and 2-halo-1,3-butadiene (halo means a halogen atom) may be at least one selected from the group consisting of.
- the modified conjugated diene-based polymer may further include a repeating unit derived from a compound represented by the following formula (1), and in this case, the modified conjugated diene-based polymer is a repeating unit derived from a conjugated diene-based monomer, represented by formula (1) It may include a compound-derived repeating unit and a functional group derived from a modifier.
- the compound-derived repeating unit represented by Formula 1 may be included in the polymer chain including the conjugated diene-based monomer-derived repeating unit and at least one end of the polymer chain.
- R 1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms,
- R 2 is a single bond or a substituent-substituted or unsubstituted C 1 to C 20 alkylene group
- R 3 and R 4 are each independently an unsubstituted or substituted C 1 to C 20 alkyl group, 3 to 20 C It is a cycloalkyl group or an aryl group having 6 to 30 carbon atoms
- the substituent is at least one selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and an aryl group having 6 to 20 carbon atoms.
- the compound-derived repeating unit represented by Formula 1 may be derived from an oligomer, which is a polymerization initiator used in a preparation method to be described later.
- R 1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- R 2 is a single bond or an unsubstituted alkylene group having 1 to 10 carbon atoms
- R 3 and R 4 are independently of each other. It may be a cyclic alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms.
- the modified conjugated diene-based polymer may further include a repeating unit derived from an aromatic vinyl-based monomer, and in this case, the modified conjugated diene-based polymer is a repeating unit derived from a conjugated diene-based monomer, a repeating unit derived from an aromatic vinyl-based monomer, It may include a repeating unit derived from the compound represented by Formula 1 and a functional group derived from a modifier.
- the aromatic vinyl-based monomer is styrene, ⁇ -methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrene, 1-vinylnaphthalene, 4-cyclohexylstyrene, 4 -(p-methylphenyl)styrene, 1-vinyl-5-hexylnaphthalene, 3-(2-pyrrolidino ethyl)styrene (3-(2-pyrrolidino ethyl)styrene), 4-(2-pyrrolidino ethyl) Styrene (4-(2-pyrrolidino ethyl)styrene) and 3-(2-pyrrolidino-1-methyl ethyl)- ⁇ -methylstyrene (3-(2-pyrrolidino-1-methyl ethyl)- ⁇ -methylstyrene) It may be at least
- the modified conjugated diene-based polymer may be a copolymer further comprising a repeating unit derived from a diene-based monomer having 1 to 10 carbon atoms together with the repeating unit derived from the conjugated diene-based monomer.
- the repeating unit derived from the diene-based monomer may be a repeating unit derived from a diene-based monomer different from the conjugated diene-based monomer, and the diene-based monomer different from the conjugated diene-based monomer may be, for example, 1,2-butadiene. .
- the modified conjugated diene-based polymer is a copolymer further comprising a diene-based monomer
- the modified conjugated diene-based polymer contains more than 0% by weight to 1% by weight of the repeating unit derived from the diene-based monomer, more than 0% by weight to 0.1% by weight, It may contain more than 0 wt% to 0.01 wt%, or more than 0 wt% to 0.001 wt%, and has the effect of preventing gel formation within this range.
- the modified conjugated diene-based polymer may have a vinyl content of 5 wt% or more, 10 wt% or more, or 10 wt% to 60 wt%.
- the vinyl content means the content of the 1,2-added conjugated diene-based monomer, not the 1,4-added, based on 100% by weight of the conjugated diene-based copolymer consisting of a monomer having a vinyl group and an aromatic vinyl-based monomer.
- the modifier may be a modifier for modifying the ends of the polymer, and a specific example may be a silica affinity modifier.
- the silica-affinity modifier may mean a modifier containing a silica-affinity functional group in a compound used as a modifier, and the silica-affinity functional group has excellent affinity with a filler, particularly a silica-based filler, and thus a silica-based filler and It may refer to a functional group capable of interaction between functional groups derived from the denaturant.
- the modifier may be, for example, an alkoxysilane-based compound, and a specific example may be an alkoxysilane-based compound containing at least one hetero atom such as a nitrogen atom, an oxygen atom, or a sulfur atom.
- a specific example may be an alkoxysilane-based compound containing at least one hetero atom such as a nitrogen atom, an oxygen atom, or a sulfur atom.
- the affinity of the modified conjugated diene-based polymer including the first copolymer unit with the inorganic filler and the like can be improved from the modifier-derived functional group present at one end of the first copolymer unit, and thus modified There is an effect that the viscoelasticity of the rubber composition containing the conjugated diene-based polymer is further improved.
- the alkoxysilane-based compound contains a nitrogen atom, in addition to the effect derived from the silyl group, an additional synergistic effect of physical properties derived from the nitrogen atom can be expected.
- the modifier may include a compound represented by the following formula (2).
- R 1 may be a single bond or an alkylene group having 1 to 10 carbon atoms
- R 2 and R 3 may each independently be an alkyl group having 1 to 10 carbon atoms
- R 4 is hydrogen, or an alkylene group having 1 to 10 carbon atoms.
- R 21 is a single bond, an alkyl having 1 to 10 carbon atoms Rene group, or -[R 42 O] j - may be, R 42 may be an alkylene group having 1 to 10 carbon atoms, a and m may each independently be an integer selected from 1 to 3, n is 0, 1 , or may be an integer of 2, and j may be an integer selected from 1 to 30.
- R 1 may be a single bond or an alkylene group having 1 to 5 carbon atoms
- R 2 and R 3 may each independently be hydrogen or an alkyl group having 1 to 5 carbon atoms
- R 4 is hydrogen, an alkyl group having 1 to 5 carbon atoms, a trialkylsilyl group substituted with an alkyl group having 1 to 5 carbon atoms, or a heterocyclic group having 2 to 5 carbon atoms
- R 21 is a single bond, or an alkylene group having 1 to 5 carbon atoms, or -[R 42 O] j -
- R 42 may be an alkylene group having 1 to 5 carbon atoms
- a may be an integer of 2 or 3
- m may be an integer selected from 1 to 3
- the heterocyclic group when R 4 is a heterocyclic group, the heterocyclic group may be unsubstituted or substituted with a trisubstituted alkoxysilyl group, and when the heterocyclic group is substituted with a trisubstituted alkoxysilyl group, the trisubstituted alkoxysilyl group It may be substituted by being connected to the heterocyclic group by an alkylene group having 1 to 10 carbon atoms, and the trisubstituted alkoxysilyl group may mean an alkoxysilyl group substituted with an alkoxy group having 1 to 10 carbon atoms.
- the compound represented by Formula 2 is N,N-bis(3-(dimethoxy(methyl)silyl)propyl)-methyl-1-amine(N,N-bis(3-(dimethoxy(methyl)) silyl)propyl)-methyl-1-amine), N,N-bis(3-(diethoxy(methyl)silyl)propyl)-methyl-1-amine (N,N-bis(3-(diethoxy(methyl)) silyl)propyl)-methyl-1-amine), N,N-bis(3-(trimethoxysilyl)propyl)-methyl-1-amine(N,N-bis(3-(trimethoxysilyl)propyl)-methyl -1-amine), N,N-bis(3-(triethoxysilyl)propyl)-methyl-1-amine (N,N-bis(3-(triethoxysilyl)propyl)-methyl-1-amine), N,N-diethyl-3-(tri
- the modifier may include a compound represented by the following formula (3).
- R 5 , R 6 and R 9 may each independently be an alkylene group having 1 to 10 carbon atoms
- R 7 , R 8 , R 10 and R 11 are each independently an alkyl group having 1 to 10 carbon atoms.
- R 12 may be hydrogen or an alkyl group having 1 to 10 carbon atoms
- b and c are each independently 0, 1, 2 or 3
- b + c ⁇ 1 and A is or may be, and in this case, R 13 , R 14 , R 15 and R 16 may each independently be hydrogen or an alkyl group having 1 to 10 carbon atoms.
- the compound represented by Formula 3 is N-(3-(1H-imidazol-1-yl)propyl)-3-(triethoxysilyl)-N-(3-(triethoxysilyl)propyl Propan-1-amine (N-(3-(1H-imidazol-1-yl)propyl)-3-(triethoxysilyl)-N-(3-(triethoxysilyl)propyl)propan-1-amine) and 3-(4 ,5-dihydro-1H-imidazol-1-yl)-N,N-bis(3-(triethoxysilyl)propyl)propan-1-amine (3-(4,5-dihydro-1H-imidazol) It may be one selected from the group consisting of -1-yl)-N,N-bis(3-(triethoxysilyl)propyl)propan-1-amine).
- the modifier may include a compound represented by the following formula (4).
- a 1 and A 2 may each independently be a divalent hydrocarbon group having 1 to 20 carbon atoms including or not including an oxygen atom
- R 17 to R 20 are each independently a monovalent hydrocarbon group having 1 to 20 carbon atoms.
- L 1 to L 4 are each independently a monosubstituted, disubstituted or trisubstituted alkylsilyl group substituted with an alkyl group having 1 to 10 carbon atoms, or a monovalent hydrocarbon group having 1 to 20 carbon atoms
- L 1 and L 2 and L 3 and L 4 may be connected to each other to form a ring having 1 to 5 carbon atoms
- a ring formed may include 1 to 3 at least one hetero atom selected from the group consisting of N, O and S.
- a 1 and A 2 may each independently be an alkylene group having 1 to 10
- R 17 to R 20 may each independently be an alkyl group having 1 to 10 carbon atoms
- L 1 to L 4 is each independently a trialkylsilyl group substituted with an alkyl group having 1 to 5 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or L 1 and L 2 and L 3 and L 4 are connected to each other to form a ring having 1 to 3 carbon atoms may be formed, and when L 1 and L 2 and L 3 and L 4 are connected to each other to form a ring, the formed ring may contain 1 to 3 heteroatoms selected from the group consisting of N, O and S. May include dogs.
- the compound represented by Formula 4 is 3,3'-(1,1,3,3-tetramethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine) (3,3'-(1,1,3,3-tetramethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine)), 3,3'-(1,1,3,3 -Tetraethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine)(3,3'-(1,1,3,3-tetraethoxydisiloxane-1,3-diyl)bis (N,N-dimethylpropan-1-amine), 3,3'-(1,1,3,3-tetrapropoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine) (3,3'-(1,1,3,3-tetra
- the modifier may include a compound represented by the following Chemical Formula 5.
- R 22 and R 23 are each independently an alkylene group having 1 to 20 carbon atoms, or -R 28 [OR 29 ] f -, and R 24 to R 27 are each independently an alkyl group having 1 to 20 carbon atoms, or It may be an aryl group having 6 to 20 carbon atoms, R 28 and R 29 may each independently be an alkylene group having 1 to 20 carbon atoms, and R 47 and R 48 may each independently be a divalent hydrocarbon group having 1 to 6 carbon atoms.
- d and e are each independently 0, or an integer selected from 1 to 3
- d+e may be an integer of 1 or more
- f may be an integer of 1 to 30.
- R 22 and R 23 may each independently be an alkylene group having 1 to 10 carbon atoms, or -R 28 [OR 29 ] f -, and R 24 to R 27 are each independently a carbon number 1 to 10 may be an alkyl group, R 28 and R 29 may each independently be an alkylene group having 1 to 10 carbon atoms, d and e are each independently 0, or an integer selected from 1 to 3, d + e is It may be an integer of 1 or more, and f may be an integer selected from 1 to 30.
- the compound represented by Formula 5 may be a compound represented by Formula 5a, Formula 5b, or Formula 5c.
- R 22 to R 27 , d and e are the same as described above.
- the compound represented by Formula 5 is 1,4-bis(3-(3-(triethoxysilyl)propoxy)propyl)piperazine (1,4-bis(3-(3-(triethoxysilyl) ) propoxy) propyl) piperazine), 1,4-bis (3- (triethoxysilyl) propyl) piperazine (1,4-bis (3- (triethoxysilyl) propyl) piperazine), 1,4-bis (3 -(trimethoxysilyl)propyl)piperazine(1,4-bis(3-(trimethoxysilyl)propyl)piperazine), 1,4-bis(3-(dimethoxymethylsilyl)propyl)piperazine(1,4 -bis(3-(dimethoxymethylsilyl)propyl)piperazine), 1-(3-(ethoxydimethylsilyl)propyl)-4-(3-(triethoxysilyl)propyl)piperazine
- the modifier may include a compound represented by the following formula (6).
- R 30 may be a monovalent hydrocarbon group having 1 to 30 carbon atoms
- R 31 to R 33 may be each independently an alkylene group having 1 to 10 carbon atoms
- R 34 to R 37 are each independently a carbon number It may be an alkyl group of 1 to 10, g and h are each independently 0, or an integer selected from 1 to 3, g+h may be an integer of 1 or more.
- the modifier may include a compound represented by the following formula (7).
- a 3 and A 4 may each independently be an alkylene group of 1 to 10
- R 38 to R 41 may each independently be an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms
- i may be an integer selected from 1 to 30.
- the denaturant is 3,4-bis(2-methoxyethoxy)-N-(4-(triethoxysilyl)butyl)aniline (3,4-bis(2-methoxyethoxy)-N-( 4-(trimethylsilyl)butyl)aniline), N,N-diethyl-3-(7-methyl-3,6,8,11-tetraoxa-7-silatridecan-7-yl)propan-1-amine (N,N-diethyl-3-(7-methyl-3,6,8,11-tetraoxa-7-silatridecan-7-yl)propan-1-amine), 2,4-bis(2-methoxy oxy)-6-((trimethylsilyl)methyl)-1,3,5-triazine (2,4-bis(2-methoxyethoxy)-6-((trimethylsilyl)methyl)-1,3,5-triazine) and 3,14-dimethoxy-3,8,8,13-tetramethyl-2,
- the modifier may include a compound represented by the following Chemical Formula 8.
- R 43 , R 45 and R 46 may each independently be an alkyl group having 1 to 10 carbon atoms, R 44 may be an alkylene group having 1 to 10 carbon atoms, and k may be an integer selected from 1 to 4 have.
- the compound represented by Formula 8 is 8,8-dibutyl-3,13-dimethoxy-3,13-dimethyl-2,14-dioxa-7,9-dithia-3,13- disila-8-stanpentadecane (8,8-dibutyl-3,13-dimethoxy-3,13-dimethyl-2,14-dioxa-7,9-dithia-3,13-disila-8-stannapentadecane); 8,8-dimethyl-3,13-dimethoxy-3,13-dimethyl-2,14-dioxa-7,9-dithia-3,13-disila-8-stanpentadecane (8,8- dimetyl-3,13-dimethoxy-3,13-dimethyl-2,14-dioxa-7,9-dithia-3,13-disila-8-stannapentadecane), 8,8-dibutyl-3,13-dimeth
- the present invention provides a method for producing a modified conjugated diene-based polymer capable of producing a modified conjugated diene-based polymer that simultaneously satisfies the above conditions (i) to (vii).
- an active polymer having a broad molecular weight distribution under conditions other than high temperature conditions is obtained by applying an oligomer having an anionic active end as a polymerization initiator, and performing the polymerization reaction by dividing the active polymer at least twice during polymerization. Since it can be manufactured, there is no problem of inactivation of the active site of the active polymer due to high temperature, and thus the denaturing reaction between the active polymer and the denaturant can be easily performed, resulting in a wide molecular weight distribution and a modified conjugated diene-based system having a high denaturation rate. The polymer can be easily prepared.
- the modified conjugated diene-based polymer manufacturing method comprises the steps of preparing an active polymer by polymerizing a conjugated diene-based monomer or a conjugated diene-based monomer and an aromatic vinyl-based monomer in a hydrocarbon solvent (S1); and a step (S2) of reacting or coupling the active polymer prepared in step (S1) with a modifier, wherein the polymerization in step (S1) initiates polymerization in the presence of a first polymerization initiator, and a polymerization conversion rate of 50% At a time point of 95% or less, a second polymerization initiator is divided at least once to perform a polymerization reaction, and the first and second polymerization initiators are each reacted with an organometallic compound, a conjugated diene-based monomer and a compound represented by Formula 1
- the conjugated diene-based monomer, the aromatic vinyl-based monomer, and the compound represented by Formula 1 used in the preparation method are the same as described above, and thus, detailed description thereof will be omitted.
- the hydrocarbon solvent is not particularly limited, but may be, for example, at least one selected from the group consisting of n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene and xylene.
- the polymerization in step (S1) may be, for example, anionic polymerization, and as a specific example, living anionic polymerization having an anionic active site at the polymerization terminal by growth polymerization reaction using anions.
- the polymerization in step (S1) may be an elevated temperature polymerization, isothermal polymerization, or constant temperature polymerization (adiabatic polymerization), and the constant temperature polymerization includes a step of polymerizing by its own heat of reaction without optionally applying heat after the polymerization initiator is added.
- the temperature-rising polymerization may refer to a polymerization method
- the temperature-rising polymerization may refer to a polymerization method in which the temperature is increased by optionally applying heat after the polymerization initiator is added, and the isothermal polymerization is heat by adding heat after the polymerization initiator is added It may refer to a polymerization method in which the temperature of the polymer is maintained constant by increasing the temperature or taking heat away.
- the polymerization in step (S1) is performed by reacting a conjugated diene-based monomer or a conjugated diene-based monomer and an aromatic vinyl-based monomer in a hydrocarbon solvent in the presence of a polymerization initiator, specifically, polymerization in the presence of a first polymerization initiator.
- a polymerization initiator specifically, polymerization in the presence of a first polymerization initiator.
- the second polymerization initiator may be divided at least once to perform the polymerization reaction.
- a new polymer chain can be easily formed by reacting with the monomer separately from the initially generated polymer chain by dividing the second polymerization initiator at least once at the time of the polymerization conversion rate described above, A large amount of polymer chains having different molecular weights may exist in the prepared active polymer, and thus the active polymer may have a broad molecular weight distribution.
- first and second polymerization initiators may be the same or different, and in the case of the same, 'first' and 'second' may mean indicating the order in which they are added to the reaction.
- the first and second polymerization initiators are oligomers having an anionic active terminal prepared by reacting an organometallic compound, a conjugated diene-based monomer, and a compound represented by Formula 1, respectively, and have a weight average molecular weight of 100 g/mol to 30,000. g/mol, or 150 g/mol to 15,000 g/mol.
- the oligomer includes a repeating unit derived from a conjugated diene-based monomer in a molecule and a repeating unit derived from a compound represented by Formula 1, wherein the repeating unit derived from the conjugated diene-based monomer and a repeating unit derived from the compound represented by Formula 1
- the repeating number of each unit may be adjusted within a range in which the oligomer satisfies the aforementioned weight average molecular weight range.
- the oligomer having an anionic active terminal may be prepared by anionic polymerization of a conjugated diene-based monomer and a compound represented by Formula 1 in the presence of an organometallic compound, wherein the conjugated diene-based monomer and the compound represented by Formula 1 are described above.
- the amount may be adjusted to satisfy the weight average molecular weight range as described above, and illustratively, the organometallic compound may be used in an amount of 0.001 mol to 1.0 mol, or 0.01 mol to 1.0 mol, based on 1 mol of the conjugated diene-based monomer.
- the compound represented by Formula 1 may be used in an amount of 0.001 to 100 moles, or 0.01 to 10 moles, based on 1 mole of the conjugated diene-based monomer.
- step (S1) 0.01 mmol to 10 mmol of a polymerization initiator is used based on 100 g of a total of monomers, wherein the polymerization initiator includes first and second polymerization initiators.
- the polymerization initiator may be used in an amount of 0.05 mmol to 5 mmol, 0.1 mmol to 2 mmol, 0.1 mmol to 1 mmol, or 0.15 to 0.8 mmol based on 100 g of the total monomer.
- the second polymerization initiator may be used in an amount of 0.001 to 100 moles, or 0.1 to 10 moles, based on 1 mole of the first polymerization initiator.
- the organometallic compound is, for example, methyllithium, ethyllithium, propyllithium, isopropyllithium, n-butyllithium, s-butyllithium, t-butyllithium, hexyllithium, n-decyllithium, t-octyllithium , phenyllithium, 1-naphthyllithium, n-eicosyllithium, 4-butylphenyllithium, 4-tolylylithium, cyclohexyllithium, 3,5-di-n-heptylcyclohexyllithium, 4-cyclopentyllithium, At least one selected from the group consisting of sodium naphthyl, potassium naphthyl, lithium alkoxide, sodium alkoxide, potassium alkoxide, lithium sulfonate, sodium sulfonate, potassium sulfonate, lithium amide, sodium
- the divided input of the second polymerization initiator may be divided batch input or divided continuous input.
- the divided input is a first division of a portion of the entire amount of the second polymerization initiator during a time point when the polymerization conversion rate is 50% or more and less than 80%. It may be continuous input, and the second divided continuous input during the time when the polymerization conversion rate is 80% or more and 95% or less of the total amount. it could be
- the polymerization of step (S1) is carried out in two or more polymerization reactors, and the polymerization conversion rate in the first polymerization reactor among the polymerization reactors is 10% or more and 50% or less, or 20 % to 50%. That is, the polymerization in step (S1) may be performed only until the polymerization conversion rate in the first polymerization reactor becomes 10% or more and 50% or less, or 20% or more and 50% or less.
- a polymer of a linear structure can be induced during polymerization by suppressing side reactions that occur while the polymer is formed, and the second polymerization is divided and injected by controlling the monomers consumed in the initial stage of the reaction.
- the amount of monomers capable of reacting with the initiator can be easily controlled. Accordingly, the molecular weight distribution may satisfy the aforementioned range while having the unimodal molecular weight distribution curve as described above. In this case, the polymerization conversion rate may be adjusted according to the reaction temperature, the residence time of the reactor, and the like.
- step (S1) is carried out in two or more polymerization reactors, and in the first polymerization reactor, in a hydrocarbon solvent, in the presence of a first polymerization initiator, a conjugated diene-based monomer or a conjugated diene-based monomer and an aromatic vinyl-based monomer
- the monomer may be polymerized until the polymerization conversion rate is 10% to 50% to prepare an active polymer having the above polymerization conversion rate, and polymerization may be continued in the second polymerization reactor and subsequent polymerization reactor to prepare the active polymer, and during polymerization
- the second polymerization initiator may be divided at least once when the polymerization conversion rate is 50% or more and 95% or less. In this case, the divided input of the second polymerization initiator may be input to the first reactor or to the second reactor and then to the polymerization reactor depending on the time of the input polymerization conversion rate.
- the polymerization in step (S1) may be carried out by further including a polar additive if necessary, and the total amount of the polar additive used in this case is 0.001 g to 50 g, or 0.002 g based on 100 g of the total monomer. to 1.0 g.
- the total amount of the polar additive may be used in a ratio of more than 0 g to 1 g, 0.01 g to 1 g, or 0.1 g to 0.9 g based on 100 g of the total polymerization initiator.
- the polar additive is, for example, tetrahydrofuran, ditetrahydrofuryl propane, diethyl ether, cyclopentyl ether, dipropyl ether, ethylene methyl ether, ethylene dimethyl ether, diethyl glycol, dimethyl ether, tertiary butoxyethoxyethane , bis(3-dimethylaminoethyl)ether, (dimethylaminoethyl)ethylether, trimethylamine, triethylamine, tripropylamine, and tetramethylethylenediamine may be at least one selected from the group consisting of, specifically, triethyl amine or tetramethylethylenediamine.
- the polymerization conversion rate can be determined by measuring the solid concentration of the copolymer solution containing the copolymer during polymerization, for example, and as a specific example, a cylindrical vessel at the outlet of each polymerization reactor to secure the copolymer solution. After mounting, a certain amount of copolymer solution is filled in a cylindrical container, the cylindrical container is separated from the reactor, the weight (A) of the cylinder filled with the copolymer solution is measured, and the air filled in the cylindrical container is Transfer the copolymer solution to an aluminum container, for example, an aluminum dish, measure the weight (B) of the cylindrical container from which the copolymer solution has been removed, and dry the aluminum container containing the copolymer solution in an oven at 140° C. for 30 minutes, and dry After measuring the weight (C) of the copolymer, it may be calculated according to Equation 3 below.
- the total solid content is a weight percentage of the solid content relative to 100% of the copolymer solution as the total solid content in the copolymer solution separated in each reactor.
- the total solid content is 20% by weight, when this is applied to Equation 3, it may be calculated by substituting 20/100, that is, 0.2.
- the polymer polymerized in the first reactor may be sequentially transferred to the polymerization reactor before the modification reactor, and polymerization may be progressed until the polymerization conversion ratio exceeds 95%.
- the second reactor or the polymerization conversion rate for each reactor from the second reactor to the polymerization reactor before the modification reactor may be appropriately adjusted for each reactor to control the molecular weight distribution.
- the active polymer prepared by the step (S1) may refer to a polymer in which a polymer anion and an organometallic cation of a polymerization initiator are combined.
- step (S1) may be carried out, for example, in a temperature range of 100° C. or less, 50° C. to 100° C., or 50° C. to 80° C., and the conversion rate of the polymerization reaction can be increased within this range.
- the term 'polymer' means that step (S1) or step (S2) is completed, prior to obtaining an active polymer or a modified conjugated diene-based polymer, during step (S1), polymerization is carried out in each reactor It may mean an intermediate in the form of a polymer being used, and may mean a polymer having a polymerization conversion rate of 95% or less in which polymerization is being carried out in the reactor.
- the denaturant in the reaction of step (S2), may be used in an amount of 0.01 mmol to 10 mmol based on 100 g of the total monomer.
- the modifier may be used in a molar ratio of 1:0.1 to 10, 1:0.1 to 5, or 1:0.1 to 1:3 based on 1 mole of the polymerization initiator in step (S1).
- the denaturant may be introduced into the denaturation reactor, and the step (S2) may be performed in the denaturation reactor.
- the modifier may be added to a transfer unit for transferring the active polymer prepared in step (S1) to a modification reactor for performing step (S2), and the active polymer and modifier are mixed in the transfer unit.
- the reaction may be proceeded by the denaturant, in which case the reaction may be a denaturation reaction in which the modifier is simply bound to the active polymer, or a coupling reaction in which the active polymer is connected based on the modifier.
- a rubber composition comprising the modified conjugated diene-based polymer.
- the rubber composition may include the modified conjugated diene-based polymer in an amount of 10 wt% or more, 10 wt% to 100 wt%, or 20 wt% to 90 wt%, within this range, tensile strength, abrasion resistance, etc. It has excellent mechanical properties and an excellent balance between the physical properties.
- the rubber composition may further include other rubber components as needed in addition to the modified conjugated diene-based polymer, wherein the rubber component may be included in an amount of 90% by weight or less based on the total weight of the rubber composition.
- the other rubber component may be included in an amount of 1 to 900 parts by weight based on 100 parts by weight of the modified conjugated diene-based polymer.
- the rubber component may be, for example, natural rubber or synthetic rubber, and specific examples thereof include natural rubber (NR) including cis-1,4-polyisoprene; Modified natural rubbers such as epoxidized natural rubber (ENR), deproteinized natural rubber (DPNR), and hydrogenated natural rubber, which are modified or refined of the general natural rubber; Styrene-butadiene copolymer (SBR), polybutadiene (BR), polyisoprene (IR), butyl rubber (IIR), ethylene-propylene copolymer, polyisobutylene-co-isoprene, neoprene, poly(ethylene-co-) propylene), poly(styrene-co-butadiene), poly(styrene-co-isoprene), poly(styrene-co-isoprene-co-butadiene), poly(isoprene-co-butadiene), poly(ethylene-co-propylene) -co
- the rubber composition may include, for example, 0.1 parts by weight to 200 parts by weight, or 10 parts by weight to 120 parts by weight of a filler based on 100 parts by weight of the modified conjugated diene-based polymer of the present invention.
- the filler may be, for example, a silica-based filler, and specific examples thereof include wet silica (hydrous silicic acid), dry silica (silicic anhydride), calcium silicate, aluminum silicate or colloidal silica, and preferably, the effect of improving the breaking properties and wet Wet silica may be the most excellent in compatibility with wet grip.
- the rubber composition may further include a carbon-based filler if necessary.
- silane coupling agent for improving reinforcing and low heat generation may be used together, and as a specific example, the silane coupling agent is bis(3-triethoxysilylpropyl)tetrasulfide , bis(3-triethoxysilylpropyl)trisulfide, bis(3-triethoxysilylpropyl)disulfide, bis(2-triethoxysilylethyl)tetrasulfide, bis(3-trimethoxysilyl) propyl) tetrasulfide, bis(2-trimethoxysilylethyl)tetrasulfide, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 2-mercaptoethyltrimethoxysilane, 2-Mercaptoethyltriethoxysilane, 3-trimethoxysily
- it may be bis(3-triethoxysilylpropyl)polysulfide or 3-trimethoxysilylpropylbenzothiazyltetrasulfide.
- a modified conjugated diene-based polymer in which a functional group with high affinity for silica is introduced is used as a rubber component, so the compounding amount of the silane coupling agent is a common may be reduced than the case, and accordingly, the silane coupling agent may be used in an amount of 1 to 20 parts by weight, or 5 to 15 parts by weight, based on 100 parts by weight of silica, and within this range, the effect as a coupling agent is not significant. It has the effect of preventing the gelation of the rubber component while being sufficiently exhibited.
- the rubber composition according to an embodiment of the present invention may be crosslinkable with sulfur, and may further include a vulcanizing agent.
- the vulcanizing agent may be specifically sulfur powder, and may be included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the rubber component. It has an excellent effect.
- the rubber composition according to an embodiment of the present invention includes, in addition to the above components, various additives commonly used in the rubber industry, specifically, a vulcanization accelerator, process oil, plasticizer, anti-aging agent, anti-scorch agent, zinc white, It may further include stearic acid, a thermosetting resin, or a thermoplastic resin.
- the vulcanization accelerator is, for example, a thiazole-based compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyl disulfide), CZ (N-cyclohexyl-2-benzothiazyl sulfenamide), or DPG
- a thiazole-based compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyl disulfide), CZ (N-cyclohexyl-2-benzothiazyl sulfenamide), or DPG
- a guanidine-based compound such as (diphenylguanidine) may be used, and may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the rubber component.
- the process oil acts as a softener in the rubber composition, and may be, for example, a paraffinic, naphthenic, or aromatic compound. Naphthenic or paraffinic process oils may be used.
- the process oil may be included in an amount of 100 parts by weight or less based on 100 parts by weight of the rubber component, for example, and has an effect of preventing deterioration of the tensile strength and low heat generation (low fuel efficiency) of the vulcanized rubber within this range.
- the antioxidant is, for example, N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 6-ethoxy-2 ,2,4-trimethyl-1,2-dihydroquinoline, or a high-temperature condensate of diphenylamine and acetone, etc., may be used in an amount of 0.1 to 6 parts by weight based on 100 parts by weight of the rubber component.
- the rubber composition according to an embodiment of the present invention can be obtained by kneading using a kneader such as a Banbury mixer, a roll, an internal mixer, etc. according to the compounding prescription, and has low heat generation and wear resistance by a vulcanization process after molding processing. This excellent rubber composition can be obtained.
- a kneader such as a Banbury mixer, a roll, an internal mixer, etc.
- the rubber composition may be used for each member of the tire, such as a tire tread, under tread, side wall, carcass coated rubber, belt coated rubber, bead filler, chaff, or bead coated rubber, vibration proof rubber, belt conveyor, hose, etc. It may be useful in the manufacture of various industrial rubber products of
- the present invention provides a tire manufactured using the rubber composition.
- the tire may include a tire or a tire tread.
- n-butyllithium 100 g (10 wt% in n-hexane) of n-butyllithium was put into a 5 L pressure reactor, and 2,000 g of n-hexane, 337 g of 1,3-butadiene and 23.0 g of 4-(dimethylamino)styrene were added. It was added and reacted at 40°C for 20 minutes to prepare an oligomer solution containing 14.9% by weight of an oligomer having an anionic active terminal having a weight average molecular weight of 3,100 g/mol.
- the polar additive solution was 0.5 g/hr, and a solution in which 1,2-butadiene was dissolved at 15 wt% in n-hexane was continuously added at a flow rate of 1 g/hr.
- the internal temperature of the reactor was maintained at 50° C., and when the polymerization conversion reached 45%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe.
- the temperature of the second reactor was maintained to be 65° C., and when the polymerization conversion rate reached 85%, the oligomer prepared in Preparation Example 1 was transferred to the pipe while transferring the polymer from the second reactor to the third reactor through the transfer pipe.
- the solution was injected at a rate of 146 g/h.
- the temperature of the third reactor was maintained at 65° C., and when the polymerization conversion rate reached 98% or more, the polymer was continuously supplied from the third reactor to the fourth reactor through a transfer pipe, and the denaturant was added to n-hexane.
- Example 1 when the polymerization conversion rate of the second reactor reached 80%, while transferring the polymer from the second reactor to the third reactor through a transfer pipe, 147 g/ h, and a solution in which 20 wt% of N-(4-methylpiperazinyl)-N,N-bis(3-(triethoxysilyl)propyl)amine is dissolved in the fourth reactor as a modifier
- the polar additive solution was 0.5 g/hr, and a solution in which 1,2-butadiene was dissolved at 15 wt% in n-hexane was continuously added at a flow rate of 1 g/hr.
- the internal temperature of the reactor was maintained at 50° C., and when the polymerization conversion reached 45%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe.
- the temperature of the second reactor was maintained at 65° C., and when the polymerization conversion rate reached 85%, the oligomer prepared in Preparation Example 2 was transferred to the pipe while transferring the polymer from the second reactor to the third reactor through the transfer pipe.
- the solution was injected at a rate of 147 g/h.
- the temperature of the third reactor was maintained at 65° C., and when the polymerization conversion rate reached 98% or more, the polymer was continuously supplied from the third reactor to the fourth reactor through a transfer pipe, and the denaturant was added to n-hexane.
- Example 2 in the fourth reactor, N-(4-methylpiperazinyl)-N,N-bis(3-(triethoxysilyl)propyl)amine was dissolved in n-hexane in an amount of 20% by weight as a modifier in the fourth reactor.
- Example 5 modified conjugated diene-based in the same manner as in Example 5, except that a solution in which tin tetrachloride (SnCl 4 ) was dissolved in 20 wt% in n-hexane as a modifier was continuously added to the fourth reactor.
- 1,1,2,2-tetrachloroethane was used as the solvent, and the sample was prepared by dissolving the polymer to 0.02 M in the solvent.
- Solvent peak is calculated as 5.97 ppm, 7.2 ⁇ 6.9 ppm is random styrene, 6.9 ⁇ 6.2 ppm is block styrene, 5.8 ⁇ 5.1 ppm is 1,4-vinyl, and 5.1 ⁇ 4.5 ppm is 1,2-vinyl peak.
- the styrene bond content (wt. %) and the 1,2-vinyl bond content (wt. %) were calculated.
- the weight average molecular weight (Mw) and number average molecular weight (Mn) were measured with gel permeation chromatohraph (GPC) (PL GPC220, Agilent Technolodies) under the following conditions, and a molecular weight distribution curve was obtained, and molecular weight distribution (PDI, MWD, Mw) /Mn) was calculated and obtained from each of the measured molecular weights.
- GPC gel permeation chromatohraph
- Measurements were made at 100°C and a rotor speed of 2 ⁇ 0.02rpm using a large rotor of Alpha Technologies' MV2000E. Specifically, after leaving the polymer at room temperature (23 ⁇ 5° C.) for more than 30 minutes, 27 ⁇ 3 g was collected, filled in the die cavity, and the platen was operated to measure for 4 minutes to obtain Mooney viscosity. Then, the slope value of the change in Mooney viscosity appearing as the torque is released was measured to obtain the absolute value of the Mooney stress relaxation rate. In addition, the Mooney relaxation area is an integral value of the Mooney relaxation curve for 120 seconds from 1 second after the rotor stops, and was calculated by Equation 1 below.
- A is the Mooney relaxation area (MLRA),
- k is the Mooney intercept 1 second after stopping the rotor operation of the Mooney viscometer
- a is the Mooney relaxation rate
- t f is the completion point of Mooney relaxation.
- the denaturation rate (%) was calculated according to Equation 2 below using the chromatogram obtained from the chromatography measurement, and the chromatographic measurement was performed using Gel permeation chromatohraph (GPC) (PL GPC220, Agilent Technolodies), each air
- GPC Gel permeation chromatohraph
- the copolymer was dissolved in cyclohexane to prepare a sample (prepared at 1.0 mg/ml) and stored in a mobile phase reservoir, and tetrahydrofuran (THF) was stored in another mobile phase reservoir.
- Each of the mobile phase reservoirs was connected to a dual-head pump, and first, a solution of the mobile phase reservoir in which the copolymer was dissolved was injected into the column filled with the silica adsorbent through the pump and the injector having a loop volume of 100 ⁇ l. At this time, the pressure of the pump was 450 psi, and the injection flow rate was 0.7 ml/min. Then, it was confirmed from the detector (ELSD, Waters) that the unmodified copolymer unit in the copolymer was no longer detected, and based on 5 minutes from the start of the injection, the tetrahydrofuran was injected into the column through a pump.
- ELSD ELSD, Waters
- the pressure of the pump was 380 psi, and the injection flow rate was 0.7 ml/min.
- the denaturation rate (%) was calculated according to the following Equation 2 from the detected chromatogram results.
- the peak area of the unmodified copolymer unit is the peak area of the chromatogram for the first solution transferred to the detector
- the peak area of the modified copolymer unit is the second solution transferred to the detector is the peak area of the chromatogram for
- Comparative Example 1 is prepared by a manufacturing method that does not perform the step of separately adding the polymerization initiator with Example 1, and Comparative Example 3 is divided into the polymerization initiator, but the polymerization conversion rate is less than 50%, which is 43%.
- Comparative Example 1 was prepared by a manufacturing method that did not show a wide molecular weight distribution characteristic, and in particular, Comparative Example 1, despite using the same polymerization initiator and modifier as in Example 1, rapidly reduced the nitrogen atom content in the polymer to 65% level, In the case of Comparative Example 3, the denaturation rate was significantly reduced to a level of 87%.
- Comparative Example 6 was prepared using the same polymerization initiator as in Example 5 and using a nitrogen-containing modifier, so that the nitrogen atom content in the polymer was as high as the Example level, but the molecular weight distribution was narrow less than 2.0 and the Mooney stress relaxation rate was 0.7 The high branching was shown to be less than, and in this case, Comparative Example 6 was prepared by a manufacturing method in which a polymerization initiator was not dividedly added.
- the modified conjugated diene-based polymer that simultaneously satisfies the conditions (i) to (vii) according to the present invention controls the polymerization conversion rate in the first polymerization reactor presented in the present specification to a specific time point, and the polymerization initiator It can be confirmed that the above conditions can be simultaneously controlled and obtained by being prepared by a manufacturing method comprising a polymerization step of divided input at a specific time.
- Each of the modified conjugated diene-based polymers of Examples and Comparative Examples was compounded under the compounding conditions shown in Table 3 below as raw rubber.
- the raw materials in Table 3 are each part by weight based on 100 parts by weight of the raw rubber.
- the rubber specimen is kneaded through the first stage kneading and the second stage kneading.
- first stage kneading raw rubber, silica (filler), organosilane coupling agent (X50S, Evonik), process oil (TDAE oil), zincating agent (ZnO), stearic acid using a Banbari mixer with temperature control device is used.
- antioxidant (TMQ(RD) (2,2,4-trimethyl-1,2-dihydroquinoline polymer), antioxidant (6PPD ((dimethylbutyl)-N-phenyl-phenylenediamine) and wax (Microcrystaline Wax) ) was kneaded.At this time, the initial temperature of the kneader was controlled to 70° C., and after the mixing was completed, a first formulation was obtained at a discharge temperature of 145° C. to 155° C. In the second stage of kneading, the first formulation was cooled to room temperature.
- each test piece was prepared according to the tensile test method of ASTM 412, and the tensile strength at the time of cutting the test piece and the tensile stress (300% modulus) at 300% elongation were measured. Specifically, the tensile properties were measured at room temperature at a speed of 50 cm/min using a Universal Test Machin 4204 (Instron Co., Ltd.) tensile tester.
- the tan ⁇ value was confirmed by measuring the viscoelastic behavior with respect to dynamic deformation at a frequency of 10 Hz and each measurement temperature (-60°C to 60°C) in Film Tension mode using a dynamic mechanical analyzer (GABO).
- GBO dynamic mechanical analyzer
- each secondary formulation was left at room temperature (23 ⁇ 5°C) for at least 30 minutes and then 27 ⁇ 3 g was collected, filled inside the die cavity, and the platen was operated for measurement for 4 minutes.
- Examples 1 to 7 according to an embodiment of the present invention were significantly superior in tensile properties, wet road resistance, rolling resistance and workability compared to Comparative Examples 1 to 6 in a well-balanced manner.
- Examples 1 to 7 satisfy all of the conditions (i) to (vii) presented in the present invention, and Comparative Examples 1 to 6 do not satisfy any one or more of the above conditions.
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Abstract
Description
Claims (15)
- 공액디엔계 단량체 유래 반복단위; 및 변성제 유래 작용기를 포함하고,하기 조건 (i) 내지 (vii)를 충족하는 것인 변성 공액디엔계 중합체:(i) 겔 투과 크로마토그래피에 의한 분자량 분포 곡선이 유니모달이고,(ii) 분자량 분포가 2.0 이상이고,(iii) 중량평균 분자량이 100,000 g/mol 내지 2,000,000 g/mol이고,(iv) 변성률이 70% 이상이고,(v) 100℃에서 측정된 무니 응력 완화율이 0.7 이상 3.0 이하이고,(vi) 하기 수학식 1로 표시되는 100℃에서 측정된 무니 완화 면적(MLRA)이 1500 MU-s 이하이고,(vii) 질소 원자 함량이 중합체 중량을 기준으로 100 ppm 이상이며,[수학식 1]상기 수학식 1에서,A는 무니 완화 면적(MLRA)이고,k는 무니점도계의 로터 작동을 멈추고 1초 후의 무니절편이며,a는 무니 완화율이고,to은 무니완화 개시시점이고,tf는 무니완화 완료시점이다.
- 제1항에 있어서,하기 화학식 1로 표시되는 화합물 유래 반복단위를 더 포함하는 것인 변성 공액디엔계 중합체:[화학식 1]상기 화학식 1에서,R1은 수소 원자, 탄소수 1 내지 20의 알킬기이고,R2는 단일결합 또는 치환기로 치환되거나 비치환된 탄소수 1 내지 20의 알킬렌기이고,R3 및 R4는 서로 독립적으로 치환기로 치환되거나 비치환된 탄소수 1 내지 20의 알킬기, 탄소수 3 내지 20의 시클로알킬기 또는 탄소수 6 내지 30의 아릴기이고,상기 치환기는 탄소수 1 내지 20의 알킬기, 탄소수 3 내지 20의 시클로알킬기 및 탄소수 6 내지 20의 아릴기로 이루어진 군에서 선택된 1종 이상인 것이다.
- 제2항에 있어서,상기 화학식 1에서, R1은 수소 원자 또는 탄소수 1 내지 10의 알킬기이고,R2는 단일결합 또는 비치환된 탄소수 1 내지 10의 알킬렌기이며,R3 및 R4는 서로 독립적으로 비치환된 탄소수 1 내지 10의 알킬기, 탄소수 3 내지 10의 시클로알킬기 또는 탄소수 6 내지 12의 아릴기인 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,상기 변성제는 알콕시실란계 화합물인 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,방향족 비닐계 단량체 유래 반복단위를 더 포함하고,상기 방향족 비닐계 단량체는 스티렌, α-메틸스티렌, 3-메틸스티렌, 4-메틸스티렌, 4-프로필스티렌, 1-비닐나프탈렌, 4-시클로헥실스티렌, 4-(p-메틸페닐)스티렌, 1-비닐-5-헥실나프탈렌, 3-(2-피롤리디노 에틸)스티렌, 4-(2-피롤리디노 에틸)스티렌 및 3-(2-피롤리디노-1-메틸 에틸)-α-메틸스티렌으로 이루어진 군으로부터 선택된 1종 이상인 것인 변성 공액디엔계 중합체.
- 탄화수소 용매 중에서, 공액디엔계 단량체 또는 공액디엔계 단량체와 방향족 비닐계 단량체를 중합하여 활성 중합체를 제조하는 단계(S1); 및상기 (S1) 단계에서 제조된 활성 중합체와 변성제를 반응 또는 커플링시키는 단계(S2)를 포함하고,상기 (S1) 단계의 중합은 제1 중합 개시제의 존재 하에 중합을 개시하고 중합 전환율 50% 이상 95% 이하인 시점에 제2 중합 개시제를 적어도 1회 분할투입하여 중합반응을 수행하고,상기 제1 및 제2 중합 개시제는 각각 유기금속 화합물, 공액디엔계 단량체 및 하기 화학식 1로 표시되는 화합물을 반응시켜 제조된 음이온 활성 말단을 갖는 올리고머이고,상기 (S1) 단계는 적어도 2기의 중합 반응기에서 연속적으로 실시되되, 상기 중합 반응기 중 제1기 반응기에서의 중합 전환율은 10% 내지 50%인 것인 제1항의 변성 공액디엔계 중합체의 제조방법:[화학식 1]상기 화학식 1에서,R1은 수소 원자, 탄소수 1 내지 20의 알킬기이고,R2는 단일결합 또는 치환기로 치환되거나 비치환된 탄소수 1 내지 20의 알킬렌기이고,R3 및 R4는 서로 독립적으로 치환기로 치환되거나 비치환된 탄소수 1 내지 20의 알킬기, 탄소수 3 내지 20의 시클로알킬기 또는 탄소수 6 내지 30의 아릴기이고,상기 치환기는 탄소수 1 내지 20의 알킬기, 탄소수 3 내지 20의 시클로알킬기 및 탄소수 6 내지 20의 아릴기로 이루어진 군에서 선택된 1종 이상인 것이다.
- 제6항에 있어서,상기 올리고머는 중량평균 분자량이 100 g/mol 내지 30,000 g/mol인 것인 변성 공액디엔계 중합체의 제조방법.
- 제6항에 있어서,상기 (S1) 단계는 단량체 총 100 g 대비 0.01 mmol 내지 10 mmol의 중합 개시제를 사용하고, 상기 중합 개시제는 제1 및 제2 중합 개시제를 포함하는 것인 변성 공액디엔계 중합체의 제조방법.
- 제6항에 있어서,상기 제2 중합 개시제는 제1 중합 개시제 1 mol 대비 0.01 mol 내지 10 mol로 사용하는 것인 변성 공액디엔계 중합체의 제조방법.
- 제6항에 있어서,상기 분할투입은 제2 중합 개시제 전량 중 일부를 중합 전환율 50% 이상 80% 미만인 시점 동안에 1차 분할연속투입하고, 전량 중 나머지를 중합 전환율 80% 이상 95% 이하인 시점 동안에 2차 분할연속투입하는 것이며, 상기 1차 분할연속투입 및 2차 분할연속투입은 각각 투입시작부터 투입종료까지 일정속도로 제2 중합 개시제를 투입하는 것인 변성 공액디엔계 중합체의 제조방법.
- 제6항에 있어서,상기 (S1) 단계의 중합은 극성 첨가제를 더 포함하여 실시되는 것인 변성 공액디엔계 중합체의 제조방법.
- 제6항에 있어서,상기 변성제는 알콕시실란계 화합물인 것인 변성 공액디엔계 중합체의 제조방법.
- 제1항의 변성 공액디엔계 중합체 및 충진제를 포함하는 고무 조성물.
- 제13항에 있어서,상기 변성 공액디엔계 중합체 100 중량부를 기준으로 0.1 중량부 내지 200 중량부의 충진제를 포함하는 것인 고무 조성물.
- 제13항에 있어서,가황제를 더 포함하는 것인 고무 조성물.
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TW202146491A (zh) | 2021-12-16 |
KR20210110224A (ko) | 2021-09-07 |
JP2022553037A (ja) | 2022-12-21 |
EP4112657A4 (en) | 2023-08-09 |
BR112022008322A2 (pt) | 2022-10-18 |
CN114599697A (zh) | 2022-06-07 |
EP4112657A1 (en) | 2023-01-04 |
US20240101744A1 (en) | 2024-03-28 |
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