WO2007032209A1 - ゴム組成物およびそれを用いたタイヤ - Google Patents
ゴム組成物およびそれを用いたタイヤ Download PDFInfo
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- WO2007032209A1 WO2007032209A1 PCT/JP2006/317093 JP2006317093W WO2007032209A1 WO 2007032209 A1 WO2007032209 A1 WO 2007032209A1 JP 2006317093 W JP2006317093 W JP 2006317093W WO 2007032209 A1 WO2007032209 A1 WO 2007032209A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or 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; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/10—Copolymers of styrene with conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L35/00—Compositions of homopolymers or 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 a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L35/06—Copolymers with vinyl aromatic monomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
Definitions
- the present invention relates to a rubber composition and a tire using the rubber composition, and in particular, a rubber composition excellent in workability, fracture characteristics, wear resistance, and low heat build-up with high dispersibility of the filler. It is about.
- any method that can reduce the amount of filler such as carbon black or silica or use carbon black having a large particle diameter can be used. Deterioration of reinforcement, wear resistance, and grip on wet roads is inevitable.
- carbon black is used as a filler
- a modified conjugate gen-based polymer in which a polymerization active site is modified with a tin compound is used as a rubber component
- Carbon is used as a filler.
- a method using a modified conjugate gen-based polymer in which both ends of the polymerization activity are modified with a black compound as a rubber component see JP-A-6-49279), and a polymerization activity using carbon black as a filler.
- a method using a modified conjugated gen-based polymer having an amino group introduced at the terminal for example, JP-A-62-207342, Kaihei 6-199923, JP-A-8-231658, JP-A-8-225604) and the like are known.
- an object of the present invention is to solve the above-described problems of the prior art, and to improve the dispersibility of the filler in place of a softener such as aroma oil while using a modified conjugate polymer as a rubber component. It is an object of the present invention to provide a rubber composition excellent in workability, fracture characteristics, wear resistance, and low heat build-up, which contains a specific substance having a small amount of a component that inhibits the above.
- the present inventors have succeeded in replacing a rubber composition using a modified conjugated gen-based polymer as a rubber component, instead of a softener such as aroma oil.
- a liquid aromatic vinyl compound having a low molecular weight at least one functional group By using a liquid aromatic vinyl compound having a low molecular weight at least one functional group, a conjugate conjugated compound copolymer, the effect of improving the dispersibility of the filler by the modified conjugated gen-based polymer is sufficiently expressed.
- the present inventors have found that the workability, fracture characteristics, wear resistance, and low heat build-up of the rubber composition can be greatly improved, and the present invention has been completed.
- the rubber composition of the present invention comprises a reinforcing filler (B) with respect to 100 parts by mass of a rubber component (A) containing 10% by mass or more of a modified conjugation-based polymer having at least one functional group. ) 20 mass parts or more, aromatic vinyl ichi compound weight capacity ⁇ 80 mass%, conjugated bond compound bulle bond content 10-80 mass%, polystyrene equivalent weight average molecular weight measured by gel permeation chromatography 5,000 It is formed by blending 5 to 60 parts by mass of a modified aromatic vinyl compound having at least one functional group, which is ⁇ 500,000, a conjugation compound copolymer (C).
- the polystyrene-reduced weight average molecular weight of the modified aromatic vinyl compound conjugated-gen compound copolymer (C) measured by gel permeation chromatography is 20,000 to 400,000. It is more preferable that it is 50,000 to 400,000.
- a polystyrene-equivalent weight average measured by gel permeation chromatography of the modified aromatic belief compound conjugated-gen compound copolymer (C) before introducing a functional group is preferably 5,000 to 300,000, more preferably 20,000 to 200,000, still more preferably 50,000 to 150,000.
- the modified aromatic beryl complex compound-conjugated conjugated compound copolymer (C) has a weight average molecular weight lower than that of the modified conjugate gen-based polymer. It is preferable.
- the functional group of the modified aromatic vinyl compound conjugated diene compound copolymer (C) has an affinity for the reinforcing filler (B).
- the functional group of the modified aromatic vinyl compound conjugated gene compound copolymer (C) is a functional group containing nitrogen.
- the functional group containing nitrogen is preferably a substituted or unsubstituted amino group, an amide group, an imino group, an imidazole group, a nitrile group, an isocyanate group, or a pyridyl group.
- the functional group containing nitrogen has the following formula (I):
- R 1 is each independently an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group or an aralkyl group), a substituted amino group, and the following formula (II):
- R 2 represents an alkylene group having a methylene group having 3 to 16 carbon atoms, a substituted alkylene group, It is preferable that the group power of the cyclic amino group represented by the formula (1) represents an oxyalkylene group or an N alkylamino alkylene group) is also selected.
- the modified aromatic vinyl compound conjugated gene compound copolymer (C) is an aromatic vinyl compound-conjugated gen compound copolymer having an active end.
- the active terminus has the following formula (III):
- ⁇ 1 is (thio) epoxy, (thio) incyanate, (thio) ketone, (thio) aldehyde, imine, amide, isocyanuric acid triester, (thio) carboxylic acid hydrocarbyl ester, (thio) carboxylic acid A monovalent group having at least one multifunctional group selected from the group consisting of metal salts, carboxylic acid anhydrides, carboxylic acid halides and carbonic acid dihydrocarbyl esters; R 3 and R 4 are each independently carbon A monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms; R 5 is a single bond or a divalent inert hydrocarbon group having 1 to 20 carbon atoms; by and; n is an integer from 1 to 3; when the oR 3 there are multiple, different and oR 3 is each of the multiple, at best; also in the molecule active proton and O - ⁇ unsalted
- R 6 and R 7 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms; p is 0 If oR 7 there are a plurality, a plurality of oR 7 may be the same as or different from each other; be ⁇ 2 integer addition in the molecule active proton and O - Table in Do included ⁇ unsalted) It is obtained by reacting at least one selected from the group force consisting of a hydrocarbyloxysilane compound.
- the modified aromatic vinyl compound conjugated diene compound copolymer (C) is represented by the following formula (V):
- each R 8 independently comprises an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms.
- Z is tin or silicon
- X is independently chlorine or bromine
- the amount of the modified aromatic vinyl compound conjugated diene compound copolymer (C) is 100 parts by mass of the rubber component (A). 20 parts by mass or more.
- the reinforcing filler (B) is carbon black and / or silica.
- the amount of the strong bon black is 50 parts by mass or more with respect to 100 parts by mass of the rubber component (A).
- the amount of silica is 50 parts by mass or more with respect to 100 parts by mass of the rubber component (A).
- the modified conjugated gen-based polymer strength 1,3-butadiene in the rubber component (A) is combined with an aromatic vinyl compound. It is a copolymer or a homopolymer of 1,3-butadiene.
- aromatic vinyl compound styrene is preferable.
- the modified conjugate polymer in the rubber component (A) has a glass transition point (Tg) of 0 ° C or lower.
- the modified conjugate polymer in the rubber component (A) is polymerized using an organic alkali metal compound or a rare earth metal compound. It is.
- the organic alkali metal compound is preferably alkyl lithium.
- the functional group of the modified conjugate polymer in the rubber component (A) has an affinity for the reinforcing filler (B).
- the functional group of the modified conjugate polymer in the rubber component (A) is a functional group containing nitrogen.
- the functional group containing nitrogen include substituted and unsubstituted amino groups, amide groups, imino groups, imidazole groups, and nitriles. Bipyridyl group is preferred.
- the functional group containing nitrogen has the following formula (I):
- R 1 is each independently an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group or an aralkyl group
- R 2 represents an alkylene group having 3 to 16 methylene groups, a substituted alkylene group, an oxyalkylene group, or an N-alkylamino-alkylene group
- a group force consisting of a cyclic amino group is also selected. It is preferable.
- the modified conjugated polymer in the rubber component (A) has the following formula at the active terminal of the conjugated polymer having an active terminal. (III):
- a 1 is (thio) epoxy, (thio) incyanate, (thio) ketone, (thio) aldehyde, imine, amide, isocyanuric acid triester, (thio) carboxylic acid hydrocarbyl ester, (thio) carboxylic acid
- R 5 is a single bond or a divalent inert hydrocarbon group having 1 to 20 carbon atoms;
- n is an integer from 1 to 3; when the oR 3 there are multiple, with or different from each other a plurality of oR 3 may be the same /, at best;! also in the molecule active proton and O - ⁇ beam
- R 6 and R 7 are each independently a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms; be ⁇ 2 integer; If oR 7 there are multiple, different and multiple oR 7 is each, at best; active proton and O is in also molecular - in, Do included ⁇ unsalted] It is obtained by reacting at least one selected from the group force consisting of the hydrocarbyloxysilane compounds represented.
- the modified conjugated polymer in the rubber component (A) is represented by the following formula (V):
- each R 8 independently comprises an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms.
- Selected from the group Z is tin or silicon;
- X is independently chlorine or bromine;
- the rubber component (A) contains natural rubber and / or polyisoprene rubber.
- the tire of the present invention is characterized by using the above rubber composition.
- a modified conjugated gen-based polymer is used as the rubber component (A), and a low-molecular weight modified aromatic beryl compound and a conjugated gen compound are used in place of a softener such as aroma oil.
- a rubber composition using the polymer (C) and having excellent dispersibility of the reinforcing filler (B), excellent workability, fracture characteristics, abrasion resistance, and low heat build-up can be provided.
- a tire using such a rubber composition can be provided.
- the present invention is described in detail below.
- the rubber composition of the present invention has a reinforcing filler (B) of 20 parts by mass or more with respect to 100 parts by mass of a rubber component (A) containing 10% by mass or more of a modified conjugate conjugated polymer having at least one functional group.
- a reinforcing filler (B) of 20 parts by mass or more with respect to 100 parts by mass of a rubber component (A) containing 10% by mass or more of a modified conjugate conjugated polymer having at least one functional group.
- the modified conjugated gen-based polymer in the rubber component (A) and the low-molecular weight modified aromatic vinyl compound-conjugated conjugated compound copolymer (C) have different molecular weights. Shows synergistic effects without interfering with its effects. That is, when the functional group of the low molecular weight modified aromatic vinyl compound conjugated diene compound copolymer (C) improves the dispersion of the reinforcing filler and the surface of the dispersed filler increases, the rubber component (A The functional group of the modified conjugation polymer in (1) adheres to the filler as bound rubber, so that the low heat buildup and wear resistance can be drastically improved.
- the rubber component (A) of the rubber composition of the present invention contains 10% by mass or more of a modified syngeneic polymer having at least one functional group.
- the modified conjugation-based polymer is not particularly limited as long as it has one or more functional groups, but the functional group contains nitrogen which is preferably a functional group having affinity with the reinforcing filler (B). More preferred are functional groups, functional groups containing silicon and functional groups containing tin.
- the functional group of the modified conjugation polymer has an affinity for the reinforcing filler (B)
- the dispersibility of the reinforcing filler (B) in the rubber composition is improved, and the workability of the rubber composition is improved. Destructive properties, wear resistance and low heat build-up are reliably improved.
- the modified conjugation polymer for example, a polymer obtained by modifying the active end of a conjugation polymer having an active end with a modifier is preferable.
- the conjugation-based polymer may be one produced by cation polymerization without particular limitation as long as it has an active terminal, or one produced by coordination polymerization.
- Conjugated polymers include copolymers of conjugated gen compounds and aromatic vinyl compounds, and conjugated gen compounds. Homopolymers are preferred. Copolymers of 1,3-butadiene and aromatic beryl compounds, and homopolymers of 1,3-butadiene are particularly preferred.
- conjugation compound as a monomer examples include 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethylbutadiene, 2-phenyl-1,3-butadiene, 1,3- Hexadiene and the like can be mentioned, and among these, 1,3-butadiene is particularly preferable.
- conjugated gene compounds may be used alone or in combination of two or more.
- the above aromatic bur compound as a monomer includes styrene, ⁇ -methylstyrene, 1-vinylenonaphthalene, 3-vinyltonolene, ethyl vinylinolebenzene, divininolebenzene, 4-cyclohexyl styrene, and 2, Examples include 4,6-trimethylstyrene, and among these, styrene is preferable.
- aromatic vinyl compounds may be used alone or in combination of two or more.
- a lithium compound which is preferably an organic alkali metal compound
- examples of the lithium compound include hydrocarbyl lithium and lithium amide compounds.
- hydrocarbyllithium is used as the polymerization initiator, a conjugate polymer having a hydrocarbyl group at the polymerization initiation terminal and the other terminal being a polymerization active site is obtained.
- a lithium amide compound when used as a polymerization initiator, a conjugated gen-based polymer having a nitrogen-containing functional group at the polymerization initiation terminal and a polymerization active site at the other terminal is obtained.
- the polymer can be used as a modified conjugation-based polymer in the present invention without modification with a modifying agent.
- the amount of lithium compound used as a polymerization initiator is preferably in the range of 0.2 to 20 mmol per 100 g of monomer.
- hydrocarbyl lithium examples include ethyl lithium, n-propyl lithium, isopropyl lithium, n-butyl lithium, sec-butyl lithium, tert-octyl lithium, n-decyl lithium, phenol lithium, 2-naphthyl lithium, Examples include 2-butyl-phenyllithium, 4-phenyl-butyllithium, cyclohexyllithium, cyclopentyllithium, and the reaction product of diisopropylbenzene and butyllithium.
- Alkyllithium such as n-propyllithium, isopropyllithium, n-butyllithium, sec-butyllithium, tert-octyllithium and n-decyllithium is preferred. Shigu n-butyllithium is particularly preferred.
- lithium amide compound lithium hexamethylene imide, lithium pyrrolidide, lithium piperidide, lithium heptamethylene imide, lithium dodecamethylene imide, lithium dimethylamide, lithium jetyl amide, lithium Dipropylamide, Lithium dibutylamide, Lithium dihexylamide, Lithium diheptylamide, Lithium dioctylamide, Lithymdi-2-ethylhexylamide, Lithium didecylamide, Lithium-N-methylbiperazide, Lithium ethylpropylamide, Lithium ethylbutyramide , Lithium methylbutyramide, lithium ethylbenzylamide, lithium methylphenethylamide and the like.
- the lithium amide compound is represented by the formula: Li AM [wherein AM is a substituted amino group represented by the above formula (I) or a cyclic amino group represented by the formula (II)]
- AM is a substituted amino group represented by the above formula (I) or a cyclic amino group represented by the formula (II)
- at least one nitrogen-containing functional group selected from the group force consisting of a substituted amino group represented by the formula (I) and a cyclic amino group represented by the formula (II) is introduced.
- a modified conjugated gen-based polymer is obtained.
- R 1 is an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group, or an aralkyl group, and specifically includes a methyl group, an ethyl group, a butyl group, an octyl group, a cyclo Preferred examples include a hexyl group, a 3-phenyl-1-propyl group, and an isobutyl group.
- R 1 may be the same or different.
- R 2 is an alkylene group having 3 to 16 methylene groups, a substituted alkylene group, an oxyalkylene group or an N-alkylamino-alkylene group.
- the substituted alkylene group includes a mono- to octa-substituted alkylene group.
- substituent include a chain or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group, a bicycloalkyl group, an aryl. Groups and aralkyl groups.
- R 2 examples include a trimethylene group, a tetramethylene group, a hexamethylene group, an oxydiethylene group, an N-alkylazadiethylene group, a dodecamethylene group, and a hexadecamethylene group.
- the lithium amide compound may be preliminarily prepared for the reaction of secondary amine and lithium compound, and may be used in the polymerization reaction.
- secondary amines include dimethylamine, jetylamine, dibutylamine, dioctylamine, dicyclohexylamine. , Diisobutylamine, azacycloheptane (ie, hexamethyleneimine), 2- (
- Examples include cyclic amines such as 3-azabicyclo [4.4.0] decane.
- the above hydrocarbyl lithium can be used as the lithium compound.
- the method for producing a conjugated gen-based polymer by ion polymerization using the organic alkali metal compound or the like as a polymerization initiator is not particularly limited.
- a conjugated gen-based polymer can be produced by polymerizing a conjugated gen compound alone or a mixture of a conjugated gen compound and an aromatic beryl compound.
- hydrocarbon solvents inert to the polymerization reaction include propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, cyclohexane, propene, 1-butene, isobutene, and trans-2.
- the above-described polymerization may be carried out in the presence of a randomizer.
- the randomizer can control the microstructure of the conjugated genie compound. For example, by using butadiene as a monomer, the 1,2-bond content of the butadiene unit of the polymer can be controlled, It has the effect of randomizing the butadiene unit and styrene unit of a copolymer using styrene and butadiene as a polymer.
- the randomizer include dimethoxybenzene, tetrahydrofuran, dimethoxyethane, diethylene glycol dibutyl ether, and diethylene group.
- the amount of the randomizer used is preferably in the range of 0.01 to 100 molar equivalents per mole of the organic alkali metal compound as the polymerization initiator.
- the anion polymerization may be carried out by any of solution polymerization, gas phase polymerization, and Balta polymerization! /
- concentration of the monomer in the solution is 5 to 50 masses. % Is preferable, and the range of 10 to 30% by mass is more preferable.
- the content of the aromatic vinyl compound in the monomer mixture is preferably in the range of 3 to 50% by mass. A range of mass% is more preferred.
- the polymerization mode is not particularly limited, and it may be a batch type or a continuous type.
- the polymerization temperature of the above-mentioned polymerization is preferably in the range of 0 to 150 ° C, more preferably in the range of 20 to 130 ° C.
- the polymerization can be carried out under generated pressure, but it is usually preferred to carry out the polymerization under a pressure sufficient to keep the monomer used in a substantially liquid phase.
- a rare earth metal compound and a complex compound of a rare earth metal compound and a Lewis base are selected.
- rare earth metal compounds include rare earth element carboxylates, alkoxides, J3-diketone complexes, phosphates and phosphites
- Lewis bases include acetylylacetone, tetrahydrofuran, pyridine. , ⁇ , ⁇ -dimethylformamide, thiophene, diphenyl ether, triethylamine, organic phosphorus compounds, monovalent or divalent alcohols, and the like.
- rare earth elements in the rare earth metal compounds include lanthanum, neodymium, praseodymium, samarium, and gadolinium. Of these, neodymium is particularly preferable.
- the component (b) used in the coordination polymerization is selected from organoaluminum compounds.
- organoaluminum compounds specifically, a trihydrocarbyl alcohol represented by the formula: R 9 A1
- R 9 is independently a hydrocarbon group having 1 to 30 carbon atoms
- hydrocarbyl aluminoxane compounds having a hydrocarbon group having 1 to 30 carbon atoms and the like.
- the organic aluminum compound include trialkylaluminum, dialkylaluminum hydride, alkylaluminum dihydride, alkylaluminoxane, and the like. These compounds may be used alone or in combination of two or more.
- As the component (b) it is preferable to use aluminoxane in combination with another organoaluminum compound.
- the component (c) used in the coordination polymerization is a compound having a hydrolyzable halogen or a complex compound of these with a Lewis base; an organic halide having a tertiary alkyl halide, benzyl halide or aryl halide. ; Non-coordinating key-on and counter-cation forces.
- the powerful component (c) include alkylaluminum chloride, dialkylaluminum chloride, silicon tetrachloride, tin tetrachloride, zinc chloride and Lewis base complexes such as alcohol, magnesium chloride and Examples include complexes with Lewis bases such as alcohols, benzyl chloride, tert-butyl chloride, benzyl bromide, tert-butyl bromide, triphenylcarboxyltetrakis (pentafluorophenol) borate, and the like. These components (c) may be used singly or in combination of two or more!
- the polymerization initiator may contain the same conjugated diene compound and Z or non-conjugated diene compound as the polymerization monomer, if necessary. May be used for preliminary preparation. Further, a part or all of the component (a) or the component (c) may be supported on an inert solid.
- the amount of each of the above components can be appropriately set, but usually (a) Ingredients are 0.001 to 0.5 mmol per lOOg of monomer.
- the molar ratio (b) component Z (a) component is preferably 5 to 1000, and (c) component Z (a) component is preferably 0.5 to 10! / ,.
- the polymerization temperature in the coordination polymerization is preferably in the range of -80 to 150 ° C, more preferably in the range of -20 to 120 ° C.
- a hydrocarbon solvent inert to the reaction exemplified in the above-described polymerization can be used, and the monomer concentration in the reaction solution is also determined in the case of the polymerization. It is the same.
- the reaction pressure in coordination polymerization is the same as in the case of ion polymerization, and the raw materials used in the reaction are substantially free of reaction inhibitors such as water, oxygen, carbon dioxide, and peptidic compounds. It is desirable to remove them.
- a nitrogen-containing compound, a silicon-containing compound, a tin-containing compound or the like is used as the modifier. be able to.
- Examples of the nitrogen-containing compound that can be used as the modifier include bis (jetylamino) benzophenone, dimethylimidazolidinone, N-methylpyrrolidone, 4-dimethylaminobenzylidene-line, and the like. .
- functional groups containing nitrogen such as substituted and unsubstituted amino groups, amide groups, imino groups, imidazole groups, nitryl groups, isocyanate groups, and pyridyl groups. Can be introduced into the conjugated gen-based polymer.
- a hydrocarboxysilane compound is preferable, and a hydrocarbyloxysilane compound represented by the above formula (III) or formula (IV) is preferable. More preferred U ,.
- imine ketimine, aldimine include amidine, a (Chio) carboxylic acid esters, unsaturated Cal Bonn esters such as Atari rate and Metatarireto Includes.
- examples of the metal of the metal salt of (thio) carboxylic acid include alkali metal, alkaline earth metal, Al, Sn, and Zn.
- R 3 and R 4 include an alkyl group having 1 to 20 carbon atoms, an alkyl group having 2 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, and an aralkyl group having 7 to 18 carbon atoms. Be mentioned.
- the alkyl group and the alkenyl group may be linear, branched or cyclic.
- the aryl group may have a substituent such as a lower alkyl group on the aromatic ring.
- Examples thereof include a phenyl group, a tolyl group, a xylyl group, and a naphthyl group.
- the aralkyl group may have a substituent such as a lower alkyl group on the aromatic ring, and examples thereof include a benzyl group, a phenethyl group, and a naphthylmethyl group.
- the divalent inert hydrocarbon group having 1 to 20 carbon atoms in R 5 is preferably an alkylene group having 1 to 20 carbon atoms.
- the alkylene group may be linear, branched, or cyclic, but a linear one is particularly preferable.
- Examples of the linear alkylene group include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, an otatamethylene group, a decamethylene group, and a dodecamethylene group.
- n is a force 3 force S, which is an integer of 1 to 3, and when n is 2 or 3, each R 30 may be the same or different.
- hydrocarbyloxysilane compound represented by the formula (III) examples include (thio) epoxy group-containing hydrocarbyloxysilane compounds such as 2-glycidchichetiltrimethoxysilane and 2-glycidchichee.
- Tiltlyethoxysilane (2-Glycidoxychetyl) methyldimethyoxysilane, 3-Glycidoxypropyltrimethoxysilane, 3-Glycidoxypropyltriethoxysilane, (3-Glycidoxypropynole) methinoresinmethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrioxysilane, 2- (3,4-epoxycyclohexylene) ethinole (methinole) dimethoxy
- triethoxysilane are particularly preferred.
- N- (l-methylpropylidene) -3- (triethoxysilyl) -1-propanamine And ⁇ - (1,3-dimethylbutylidene) -3- (triethoxysilyl) -1-propyl panamine is particularly preferred.
- hydrocarbyloxysilane compounds include the following. That is, the carboxylic acid ester group-containing compound includes 3-methacryloyloxypropyltriethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-methacryloyloxypropylmethyljetoxysilane, 3-methacryloyl Roxypropyltriisopropoxysilane is exemplified, and among these, 3-methacryloyloxypropyltrimethoxysilane is preferable.
- the carboxylic acid ester group-containing compound includes 3-methacryloyloxypropyltriethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-methacryloyloxypropylmethyljetoxysilane, 3-methacryloyl Roxypropyltriisopropoxysilane is exemplified, and among these, 3-methacryloyloxypropyltrimethoxys
- the isocyanate group-containing compounds include 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3-isocyanatopropylmethyl jetoxysilane, 3-isocyanatopropyltrisilane. Examples include isopropoxysilane, among which 3-isocyanatopropyltriethoxysilane is preferred!
- hydrocarbyloxysilane compound represented by the formula (IV) examples include tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, tetraisopropoxysilane, and tetra-n-butoxysilane.
- the hydrocarbyloxysilane compound may be used alone or in combination of two or more.
- a partial condensate of the above hydrocarbyloxysilane compound can also be used.
- each R 8 independently represents an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms.
- R 8 examples include a methyl group, an ethyl group, an n-butyl group, a neophyll group, a cyclohexyl group, an n-octyl group, and a 2-ethylhexyl group.
- Z is tin or silicon, and X is independently chlorine or bromine.
- a is an integer of 0 to 3
- Coupling agents of formula (V) include tin tetrachloride, R nCl, R 8 Sn
- tin tetrachloride with CI, R 8 SnCl and the like being preferred.
- the modification reaction with the above modifier is preferably carried out by a solution reaction, and the solution may contain a monomer used during polymerization.
- the reaction format of the denaturation reaction is not particularly limited, and may be a batch type or a continuous type.
- the reaction temperature of the denaturation reaction is such that the reaction proceeds As long as it does, it does not specifically limit, You may employ
- the amount of the modifier used is preferably in the range of 0.25 to 3.0 mol, more preferably in the range of 0.5 to 1.5 mol, relative to 1 mol of the polymerization initiator used for the production of the conjugate polymer.
- the modified conjugation-based polymer in the rubber component (A) preferably has a glass transition point (Tg) force C or less measured by a differential scanning calorimeter (DSC).
- Tg glass transition point
- DSC differential scanning calorimeter
- the rubber composition of the present invention contains the above-mentioned modified conjugation-based polymer as the rubber component (A).
- the content of the modified conjugation-based polymer in the rubber component (A) is 10% by mass or more.
- the workability of the rubber composition which is less effective in improving the dispersibility of the reinforcing filler (B), low heat generation The effect of improving the property, fracture characteristics and wear resistance is small.
- the rubber component (A) other than the modified conjugate conjugated polymer natural rubber (NR), unmodified styrene-butadiene copolymer (SBR), polybutadiene rubber (BR), polyisoprene rubber (IR), butyl rubber (IIR), ethylene-propylene copolymer and the like can be used, and among these, natural rubber and polyisoprene rubber are preferable.
- natural rubber NR
- SBR unmodified styrene-butadiene copolymer
- BR polybutadiene rubber
- IR polyisoprene rubber
- IIR butyl rubber
- ethylene-propylene copolymer and the like ethylene-propylene copolymer and the like
- These rubber components may be used alone or as a blend of two or more.
- the rubber composition of the present invention contains 20 parts by mass or more of reinforcing filler (B) with respect to 100 parts by mass of the rubber component (A).
- carbon black and silica are preferred as the reinforcing filler (B).
- the amount of the carbon black is preferably 50 parts by mass or more with respect to 100 parts by mass of the rubber component (A).
- the amount of the silica is 50 parts by mass or more with respect to 100 parts by mass of the rubber component (A).
- the blending amount of carbon black or silica is 50 parts by mass or more with respect to 100 parts by mass of the rubber component, it is possible to sufficiently ensure the fracture characteristics and wear resistance of the rubber composition.
- the carbon black those of FEF, SRF, HAF, ISAF and SAF grades are preferred, and those of HAF, ISAF and SAF grades are more preferred.
- silica wet silica and wet silica, which are preferred, are more preferred.
- an aromatic Binirui ⁇ amount is 5 to 80 mass 0/0, Bulle binding of the conjugated Jeni spoon Gobutsu portion at 10 to 80 wt%, by gel permeation chromatography
- the measured polystyrene-converted weight average molecular weight is 5,000 to 500,000
- the modified aromatic vinyl compound conjugated diene compound copolymer (C) having at least one functional group is added to 100 parts by mass of the rubber component (A). It is preferably contained in an amount of -60 parts by mass, more preferably 15-60 parts by mass, and even more preferably 20-60 parts by mass.
- the blending amount of the low molecular weight modified aromatic beer compound conjugate-gen compound copolymer (C) is less than 5 parts by mass, the workability of the rubber composition deteriorates.
- the low molecular weight modified aromatic vinyl compound conjugation compound copolymer (C) is required to have an aromatic vinyl compound content of 5 to 80% by mass.
- the binding amount of the aromatic vinyl compound is less than 5% by mass or more than 80% by mass, sufficient compatibility between ensuring the workability of the rubber composition and reducing the loss tangent (tan ⁇ ) of the rubber composition should be achieved. I can't.
- the low molecular weight modified aromatic vinyl compound conjugated gen compound copolymer (C) needs to have a butyl bond content of 10 to 80% by mass in the conjugated genic compound portion.
- the amount of vinyl bonds in the joint Jy compound part is less than 10% by mass or more than 80% by mass, sufficient workability of the rubber composition and reduction of the loss tangent (tan ⁇ ) of the rubber composition are achieved. Can not do it.
- the polystyrene-reduced weight average molecular weight of the low molecular weight modified aromatic vinyl compound conjugated diene compound copolymer (C) measured by gel permeation chromatography is 5,000 to 500,000, and 20,000 to 400,000. It is more preferable that it is 50,000 to 400,000. If the weight average molecular weight is less than 5,000, the loss tangent (tan ⁇ ) of the rubber composition tends to increase. On the other hand, if it exceeds 500,000, the workability of the rubber composition decreases.
- the polystyrene-reduced weight average molecular weight measured by gel permeation chromatography of the low molecular weight modified aromatic vinyl compound conjugated diene compound copolymer (C) before introducing the functional group may be 5,000 to 300,000. More preferably, it is 20,000 to 200,000, and even more preferably 50,000 to 150,000. in this case When the weight average molecular weight after the functional group introduction is in the range of 5,000 to 500,000, loss tangent (tan ⁇ ) can be easily reduced and workability can be easily secured.
- the low molecular weight modified aromatic vinyl compound conjugated diene compound copolymer (C) has at least one functional group, and the functional group has an affinity for the reinforcing filler ( ⁇ ). More preferred are functional groups containing nitrogen, functional groups containing silicon, and functional groups containing tin, which are preferred functional groups.
- the functional group of the modified aromatic vinyl compound conjugate gene compound copolymer (C) has an affinity for the reinforcing filler ( ⁇ )
- the dispersibility of the reinforcing filler ( ⁇ ) in the rubber composition is reduced. This will improve the workability, fracture characteristics, wear resistance and low heat generation of the rubber composition.
- the modified aromatic vinyl compound conjugated gen compound copolymer (C) is obtained by copolymerizing (1) a monomer aromatic vinyl compound and a conjugated gen compound using a polymerization initiator. Or a method of modifying the active terminal with various modifiers after the formation of an aromatic butyl compound conjugated gen compound copolymer having an active terminus, and (2) an aromatic vinyl compound as a monomer and a conjugated diamine. It can be obtained by a method of copolymerizing the compound with a polymerization initiator having a functional group.
- examples of the aromatic vinyl compound include styrene, ⁇ -methylstyrene, m-methylstyrene, p-tert-butylstyrene, ⁇ -methylstyrene, chloromethylenostyrene, butyltoluene, and the like. Of these, styrene is preferred.
- examples of the synergistic compound include 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethylbutadiene, and among these, 1,3-butadiene is preferable.
- a lithium compound which is preferably an organic alkali metal compound, is more preferable.
- the lithium compound include hydrocarbyl lithium and lithium compounds listed as the polymerization initiator used for the production of the above conjugate polymer.
- hydrocarbyl lithium when used as a polymerization initiator, a copolymer having a hydrocarbyl group at the polymerization initiation terminal and the other terminal being a polymerization active site is obtained.
- the above-described lithium amide compound when used as a polymerization initiator, a copolymer having a nitrogen-containing functional group at the polymerization initiation terminal and the other terminal being a polymerization active site is obtained. Even if it is not modified with an agent, it has at least one functional group.
- the above Examples of the lithium compound include lithium represented by the formula: Li AM [wherein AM is a substituted amino group represented by the above formula (I) or a cyclic amino group represented by the formula (II)]
- an amido compound is used, at least one nitrogen-containing functional group selected from the group consisting of a substituted amino group represented by formula (I) and a cyclic amino group represented by formula (II) is introduced.
- the modified aromatic vinyl compound conjugated-gen compound copolymer (C) is obtained.
- the modified aromatic vinyl compound conjugated diene compound copolymer (C) is used in the same manner as the above-described production of the modified conjugated diene-based polymer by ion polymerization, and the start of polymerization.
- the amount of the agent used can be adjusted as appropriate.
- the modified aromatic bur compound-conjugation compound copolymer (C) is preferably produced by solution polymerization.
- the modified aromatic vinyl compound-conjugation compound copolymer (C) is aromatic.
- the amount of aromatic vinyl compound in the total amount of the conjugated Jen compound and the aromatic vinyl compound in the polymerization reaction solution is 5 to 80% by mass. The range of is preferable.
- a nitrogen-containing compound, a tin-containing compound, and a silicon-containing compound are preferable. .
- a modifying agent that can be used for the production of the above modified conjugate conjugated polymer specifically, bis (jetylamino) benzophenone, dimethylimidazolidinone, N-methylpyrrolidone, 4
- Nitrogen-containing compounds such as dimethylaminobenzylidene-phosphorus, hydrocarbyloxysilane compounds represented by the above formula (III) or formula (IV), and the above formula (V) It is preferable to use a coupling agent or the like.
- the above nitrogen-containing compound When the above nitrogen-containing compound is used as a modifier, functional groups containing nitrogen such as substituted and unsubstituted amino groups, amide groups, imino groups, imidazole groups, nitryl groups, isocyanate groups, and pyridyl groups.
- the group can be introduced into an aromatic vinyl compound / conjugated conjugated compound compound copolymer.
- a functional group containing a cage is introduced into the aromatic vinyl compound conjugated diene compound copolymer. can do.
- a modified aromatic vinyl compound conjugated diene compound copolymer obtained by modification with the coupling agent ( C) has at least one tin-carbon bond or silicon-carbon bond.
- the modification with these modifiers can be carried out in the same manner as in the production of the modified conjugate conjugated polymer described above.
- the reaction solution containing (C) is dried to separate the modified aromatic bur compound conjugated gen compound copolymer (C), and then the resulting modified aromatic vinyl compound conjugated gen compound copolymer (C) is used as the rubber.
- the rubber composition of the present invention includes the rubber component (A), a reinforcing filler (B) such as carbon black and silica, a low molecular weight aromatic vinyl compound, a conjugated diene compound copolymer (C), and
- compounding agents commonly used in the rubber industry such as anti-aging agents, silane coupling agents, vulcanization accelerators, vulcanization accelerators, vulcanizers, etc., do not impair the purpose of the present invention. It can select and mix
- the rubber composition comprises a rubber component (A) containing a modified conjugation-based polymer, a reinforcing filler (B), a low molecular weight aromatic bur compound, a conjugation compound copolymer (C), and a necessary component. It can be produced by blending various compounding agents appropriately selected according to the conditions, kneading, heating, extruding and the like.
- the tire of the present invention is characterized by using the rubber composition described above, and the rubber composition is preferably used in a tread.
- the tire of the present invention can be produced according to a conventional method with no particular limitation except that the above rubber composition is used as any rubber member of the tire.
- an inert gas such as nitrogen, argon, helium, etc. can be used in addition to normal or air whose oxygen partial pressure is adjusted.
- BHT 2,6-di-butyl-p-taresol
- Liquid SBR B ′ was obtained in the same manner as liquid SBR A ′.
- Liquid SBR D ' was obtained in the same manner as liquid SBR C'.
- the microstructure of the polymer was determined by the infrared method (Morero method), and the amount of bound styrene of the polymer was determined from the integral ratio of the 1 HN MR spectrum.
- each polymer was cooled to -100 ° C and then heated at a temperature increase rate of 10 ° C / min. Measure 7 glass transition points.
- Wear resistance of rubber composition using polymer ⁇ ⁇ ⁇ and aroma oil is measured by measuring the amount of wear with a slip rate of 60% at room temperature using a Lambourn type wear tester and performing a modification reaction. As an index of wear resistance. The higher the number, the better.
- tan ⁇ was measured at a temperature of 50 ° C, a frequency of 15 Hz, and a strain of 5%, and the loss tangent of the rubber composition using unmodified polymer ⁇ and aroma oil (t an ⁇ ) is taken as 100, and is shown as an index. The smaller the index value, the better the low heat buildup.
- N SA nitrogen adsorption specific surface area
- cr Q a: c or a: cr a:
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP06797066A EP1925636B1 (en) | 2005-09-15 | 2006-08-30 | Rubber composition and tire made therefrom |
BRPI0616073-5A BRPI0616073A2 (pt) | 2005-09-15 | 2006-08-30 | composição de borracha e pneu feito da mesma |
KR1020087006403A KR101046512B1 (ko) | 2005-09-15 | 2006-08-30 | 고무 조성물 및 그것을 이용한 타이어 |
US12/066,395 US8426513B2 (en) | 2005-09-15 | 2006-08-30 | Rubber composition and tire using the same |
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JP2005268386A JP5350577B2 (ja) | 2005-09-15 | 2005-09-15 | ゴム組成物およびそれを用いたタイヤ |
JP2005-268386 | 2005-09-15 |
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WO2007032209A1 true WO2007032209A1 (ja) | 2007-03-22 |
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US (1) | US8426513B2 (ja) |
EP (1) | EP1925636B1 (ja) |
JP (1) | JP5350577B2 (ja) |
KR (1) | KR101046512B1 (ja) |
CN (2) | CN105111553A (ja) |
BR (1) | BRPI0616073A2 (ja) |
ES (1) | ES2372199T3 (ja) |
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KR20240094848A (ko) | 2022-12-16 | 2024-06-25 | 주식회사 에스피씨아이 | 공액디엔계 중합체 중합용 음이온 개시제 및 이의 제조 방법 |
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- 2006-08-30 ES ES06797066T patent/ES2372199T3/es active Active
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- 2006-08-30 WO PCT/JP2006/317093 patent/WO2007032209A1/ja active Application Filing
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EP2090593A1 (en) * | 2008-02-13 | 2009-08-19 | The Goodyear Tire & Rubber Company | Methods of making siloxy-imine functionalized rubbery polymers and uses thereof in rubber compositions for tires |
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Also Published As
Publication number | Publication date |
---|---|
US20100179274A1 (en) | 2010-07-15 |
JP2007077317A (ja) | 2007-03-29 |
KR20080044880A (ko) | 2008-05-21 |
KR101046512B1 (ko) | 2011-07-04 |
BRPI0616073A2 (pt) | 2011-06-07 |
US8426513B2 (en) | 2013-04-23 |
ZA200803279B (en) | 2009-09-30 |
EP1925636A4 (en) | 2009-09-23 |
EP1925636B1 (en) | 2011-09-28 |
JP5350577B2 (ja) | 2013-11-27 |
EP1925636A1 (en) | 2008-05-28 |
CN101268136A (zh) | 2008-09-17 |
CN105111553A (zh) | 2015-12-02 |
ES2372199T3 (es) | 2012-01-17 |
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