WO2005056615A1 - 無機充填剤との親和性に優れた重合体 - Google Patents
無機充填剤との親和性に優れた重合体 Download PDFInfo
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- WO2005056615A1 WO2005056615A1 PCT/JP2004/018734 JP2004018734W WO2005056615A1 WO 2005056615 A1 WO2005056615 A1 WO 2005056615A1 JP 2004018734 W JP2004018734 W JP 2004018734W WO 2005056615 A1 WO2005056615 A1 WO 2005056615A1
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08C19/00—Chemical modification of rubber
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- 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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- 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
- C08C19/26—Incorporating metal atoms into the molecule
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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
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- 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
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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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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/08—Epoxidation
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- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- 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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/006—Rubber characterised by functional groups, e.g. telechelic diene polymers
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- the present invention relates to a hydrocarbon polymer having a functional group having excellent affinity for an inorganic filler, a method for producing the same, and a composition thereof with the inorganic filler.
- Patent Document 1 discloses a composition in which maleic anhydride is added to a block copolymer of a vinyl aromatic hydrocarbon and a conjugated Jenig compound to improve affinity with an inorganic filler.
- Patent Document 2 discloses a silica composition of a modified polymer obtained by reacting an active terminal of a rubber-like polymer with a polyfunctional compound having an epoxy group in a molecule.
- Patent Document 1 Japanese Patent Publication No. 62-54140
- Patent document 2 W 201_23467
- the present inventors have solved the above problem by simultaneously reacting a high molecular weight hydrocarbon-based polymer having a metal-carbon bond with a polyfunctional low-molecular compound and having a metal-nitrogen bond.
- a method of reacting a low molecular weight compound or a low molecular weight compound having an amino group and a metal-carbon bond to introduce a modifying group having a specific structure into a polymer Suppresses the coupling reaction due to multi-molecules caused by the reaction of the union with the polyfunctional low-molecular-weight compound, and the functional groups are evenly distributed to the high-molecular-weight hydrocarbon polymer.
- the inventors have found that denaturation is performed, and therefore have found that a combination of an organic polymer material and an inorganic filler always obtains a constant high-performance performance, thereby leading to the present invention.
- the present invention is as follows.
- (B) selected from low-molecular compounds having an alkali metal-nitrogen bond or an alkaline earth metal-nitrogen bond, and low-molecular compounds having an alkali metal-carbon bond or an alkaline earth metal-carbon bond and containing an amino group. At least one low molecular weight compound having a molecular weight of 2000 or less;
- polyfunctional modifier (C) is a polyfunctional modifier having a glycidinoleamino group as a functional group and having two or more epoxy groups in the molecule.
- the low molecular compound (B) is at least one selected from a low molecular compound having a lithium nitrogen bond or a magnesium nitrogen bond, and an amino group-containing hydrocarbon compound having a lithium one carbon bond or a magnesium one carbon bond.
- the hydrocarbon polymer (A) is a conjugated diene polymer having a lithium-carbon bond at a terminal
- Low molecular weight compound (B) has a lithium-nitrogen bond or magnesium-nitrogen bond
- Low molecular weight compound, an amino group having a lithium-carbon bond or magnesium-carbon bond At least one selected from hydrocarbon compounds containing
- the polyfunctional modifier (C) is a polyfunctional modifier having two or more diglycidinoleamino groups as functional groups in the molecule,
- the modified hydrocarbon polymer according to the above (1) wherein at least one terminal of the polymer has a modifying group having an N / c of more than 1/2.
- the hydrocarbon polymer (A) is a conjugated diene polymer obtained by living anion polymerization having a lithium-carbon bond at a terminal,
- the low molecular compound (B) is at least one selected from a low molecular compound having a lithium-nitrogen bond or a magnesium-nitrogen bond, and an amino group-containing hydrocarbon compound having a lithium-carbon bond or a magnesium-carbon bond;
- Multifunctional denaturant (C) Force Has two or more diglycidinoleamino groups as functional groups in the molecule
- a filler selected from the group consisting of a silica-based inorganic filler, a metal oxide and a metal hydroxide, dispersed in the modified hydrocarbon-based polymer;
- a vulcanized rubber composition comprising 100 parts by weight of the modified hydrocarbon polymer according to (5) and 100 parts by weight of a silica-based inorganic filler and 50 parts by weight of carbon black. .
- the hydrocarbon polymer having a functional group obtained by the present invention is a polymer having a high performance in combination with an inorganic filler, which is mild, wide, and constant under kneading conditions.
- an inorganic filler which is mild, wide, and constant under kneading conditions.
- One inorganic material composition can be provided. Specifically, the viscosity at the time of kneading is not too high, the kneading operation is performed without trouble at an appropriate torque, and the inorganic filler is uniform and homogeneous in the high molecular weight hydrocarbon polymer matrix in the obtained blended composition. It is dispersed with a fine particle size, and as a result, high performance is exhibited.
- the high molecular weight hydrocarbon-based polymer is a rubber-like polymer
- the inorganic filler such as silica or rubber black
- the tire In applications such as tires, the balance between low rolling resistance and wet skid resistance, wear resistance, and the strength, and the modulus reduction rate at high temperatures have been improved. It becomes a composition suitable for rubber for use, anti-vibration rubber, footwear, and the like.
- the high molecular weight hydrocarbon polymer is a thermoplastic elastomer
- inorganic fillers such as silica, metal oxides and metal hydroxides are uniformly dispersed, so that the strength is improved more than before and the flame retardancy is improved.
- Asphalt composition When used for objects, effects such as improvement in the graspability of aggregate can be obtained.
- the high molecular weight hydrocarbon polymer is a thermoplastic elastomer or a thermoplastic resin
- uniform and fine dispersion can be obtained while improving compatibility in a composition with another polar resin.
- FIG. 1 is a graph showing the Tan ⁇ balance at low and high temperatures of the modified copolymer compositions of Examples and Comparative Examples.
- FIG. 2 is a graph showing the Tan 5 balance between the low-temperature and high-temperature of the modified copolymer compositions of Examples and Comparative Examples.
- the hydrocarbon polymer (A) having an alkali metal-carbon bond or an alkaline earth metal-carbon bond of the present invention is polymerized by an alkali metal initiator and Z or an alkaline earth metal initiator, Hydrocarbon polymers having an alkali metal-carbon bond or an alkaline earth metal-carbon bond at one terminal or at a plurality of terminals, which are obtained by growing by an anion polymerization reaction, may be mentioned. Further, a hydrocarbon polymer polymerized by another method, into which an alkali metal-carbon bond or an alkaline earth metal-carbon bond is introduced by a known method may be used.
- any alkali metal initiator or alkaline earth metal initiator capable of initiating polymerization can be used.
- Compounds and organic alkaline earth metal compounds are preferably used.
- an organic lithium compound is particularly suitable.
- Organic lithium compounds include those having a low molecular weight, solubilized oligomeric organic lithium compounds, those having a single lithium in one molecule, those having a plurality of lithium in a molecule, and those having an organic group. And lithium in the form of a carbon-lithium bond, a nitrogen-lithium bond, a tin-lithium bond, and the like.
- n-butyllithium, sec-butyllithium, t-butyllithium are used as monoorganic lithium compounds.
- Lithium, n-hexyllithium, benzyllithium, phenyllithium, stilbenelithium and the like are polyfunctional organolithium compounds such as 1,4-dilithiobutane, and the reaction product of sec-butyllithium and diisopropenylbenzene, 1,3,5- Trilithobenzene, a reaction product of n-butyllithium with 1,3_butadiene and dibutylbenzene, a reaction product of n-butyllithium with a polyacetylene compound, and 3_ (N, N-dimethylamino) -1_propylyl Titanium, 3_ (N, N—Jetylamino) —1_propyllithium, 3_morpholino_1_propinolelithium, 3-imidazole—1-prop
- Amino group-containing hydrocarbon lithium such as child oligomer was or nitrogen - dimethyl ⁇ amino lithium as a compound comprising lithium bond, Kishinoreamino lithium into di, diisopropylamino lithium, hexamethylene imino lithium hydroxide to.
- organic alkali metal compounds disclosed in U.S. Pat. No. 5,708,092, British Patent No. 2,241,239, U.S. Pat. No. 5,527,753 and the like are also used. I can do it.
- n-butyllithium and sec-butyllithium are particularly preferred. These organolithium compounds are used not only as one kind but also as a mixture of two or more kinds.
- organic alkali metal compounds include organic sodium compounds, organic potassium compounds, organic rubidium compounds, and organic cesium compounds. Specifically, there are sodium naphthalene and potassium naphthalene.In addition, lithium, sodium, and potassium anoreoxides, sulfonates, carbonates, amides, and the like are used, and may be used in combination with other organic metal compounds. is there.
- Typical examples of the alkaline earth metal initiator include an organic magnesium compound, an organic calcium compound, and an organic strontium compound. Specifically, dibutylmag
- alkaline earth metal alkoxides such as alkaline earth metal alkoxides, sulfonates, carbonates, and amides are used. These organic alkaline earth metal compounds can be used in combination with an organic alkali metal initiator and other organic metal compounds. is there.
- the polymer (A) is an alkali metal initiator and / or
- the polymerization is carried out in a batch system or a continuous system.
- the polymer (A) is preferably a polymer having an active terminal obtained by a growth reaction by living anion polymerization.
- a monomer for forming a polymer any polymerizable by living anion polymerization can be used.
- the obtained polymer having an active metal is preferably used immediately in the next reaction.
- a polymer having active lithium when left at a high temperature, lithium hydride may be generated and active metal may be reduced. In that case, the modification rate of the polymer may decrease.
- it should be subjected to the next reaction immediately after the monomer is substantially consumed, and should be subjected to the next reaction within 5 minutes at least at 80 ° C or higher.
- Hydrocarbon polymers polymerized by other methods into which an alkali metal-carbon bond or an alkaline earth metal-carbon bond is introduced by a known method, include the main types of hydrocarbon polymers. It can be obtained by, for example, a method of reacting a soluble organic alkali metal compound or a soluble alkaline earth metal compound with the middle or end of the chain. According to this method, it is possible to introduce an alkali metal-carbon bond into high cis polybutadiene, EPDM, or the like.
- an organic alkali metal compound and / or an organic alkali metal compound is added to a solution of a hydrocarbon-based polymer having a double bond somewhere in a main chain, a side chain, a terminal part, or the like in a molecule using an inert solvent.
- the reaction is carried out by a method using an alkaline earth metal compound, more preferably a polar substance selected from ethers and tertiary amines as an activator, preferably at a temperature of 30 to 200 ° C.
- an alkaline earth metal compound more preferably a polar substance selected from ethers and tertiary amines as an activator, preferably at a temperature of 30 to 200 ° C.
- N, N, N,, ⁇ , -tetramethylethylenediamine in sec-butyllithium, 50-100. It is more preferable to use the polymer lithiated by reacting with C immediately.
- the hydrocarbon-based polymer does not deactivate an alkali metal-carbon bond or an alkaline earth metal-carbon bond.
- the hydrocarbon polymer is a hydrocarbon polymer having a double bond in the molecule or a saturated carbon.
- a hydride polymer is used.
- hydrocarbon polymer having a double bond in the molecule examples include a polymer of a conjugated double bond compound, a copolymer of two or more conjugated double bonds, a conjugated double bond compound, and a conjugated double bond compound.
- a copolymer of the compound and a copolymerizable monomer is used. Specific examples include polybutadiene, polyisoprene, butadiene-isoprene copolymer, butadiene-styrene copolymer, isoprene-styrene copolymer, and butadiene-isoprene-styrene copolymer.
- Butadiene units and isoprene units can be 1, 4 bonds, 1, 2 or 3, 4 bonds.
- the bonding mode of the copolymer may be any of random bonding and block bonding.
- the structure of the polymer may be either a linear polymer or a branched polymer. Examples of the branched polymer include a radial type (radial type) and a comb type.
- the molecular weight distribution ranges from narrow to wide and may be any. Specifically, in the molecular weight distribution represented by MwZMn, it is usually used in the range of 1.0 force, etc.
- Examples of the random copolymer include a butadiene-isoprene random copolymer, a butadiene-styrene random copolymer, an isoprene-styrene random copolymer, and a butadiene-isoprene-styrene random copolymer.
- Examples of the random copolymer include a completely random copolymer having a statistically random composition, and a taper-one random copolymer having a tapered composition distribution. Further, even if the homopolymer has a single monomer composition, it may be a polymer having a uniform composition due to its monomer bonding mode, i.e., 1,4 bond and 1,2 bond, etc. Block-shaped or various structures are possible.
- Examples of the block bonding include a bonding of homopolymer blocks, a bonding of blocks made of a random polymer, and a bonding of blocks made of a tapered random polymer. Further, there are a type 2 block copolymer composed of two blocks, a type 3 block copolymer composed of three, and a type 4 block copolymer composed of four.
- a block polymer a block composed of a butyl aromatic compound such as styrene is represented by S, and a block composed of a conjugated gen compound such as butadiene or isoprene and / or a copolymer of a butyl aromatic compound and a conjugated gen compound is used.
- an S-B2 type block Examples include a copolymer, an S_B_S3 type block copolymer, an S—B_S_B4 type block copolymer, and a block copolymer represented by (S—B) mx.
- block B is a copolymer of a vinyl aromatic compound and a conjugated conjugate
- the vinyl aromatic in the block B The aromatic hydrocarbons may be distributed uniformly or in a tapered shape, and the block B may include a portion in which the butyl aromatic hydrocarbons are uniformly distributed and / or a tapered shape.
- block B may contain multiple segments with different contents of butyl aromatic hydrocarbons in block B.
- N is an integer of 1 or more, preferably an integer of 15 to 5.
- m is an integer of 2 or more, preferably an integer of 2 to 11.
- X is the residue of a coupling agent or the residue of a polyfunctional initiator.
- block S and block B are respectively When there are a plurality, the structures such as molecular weight and composition may be the same or different, and the structures of the polymer chains bonded to X may be the same or different.) However, any mixture having the structure represented by the above general formula may be used.
- hydrocarbon polymers include polystyrene, polyethylene, polypropylene, EPM, EPDM, and polybutene. Further, among these polymers, copolymers of other monomers copolymerizable with the main monomer may be used.
- polystyrene other monomers copolymerizable with styrene, specifically, p-methylstyrene, ⁇ -methylstyrene, diphenylethylene, dibutylbenzene, diisopropenylbenzene, carbon atoms of 110 And methacrylic acid or acrylic acid ester, attalilononitrile.
- the hydrocarbon polymer having a molecular weight (A) is a polymer having a weight average molecular weight of 10,000 or more. When the molecular weight is high, various performances are easily exhibited. On the other hand, if the molecular weight is too high, kneading becomes difficult, and performance may not be easily exhibited.
- the weight average molecular weight is preferably 2,000,000 or less due to kneading properties.
- the preferred molecular weight is 30,500,000, more preferably 50,1,200,000.
- the molecular weight is expressed as a weight average molecular weight in terms of standard polystyrene measured by GPC.
- modifying group of the hydrocarbon polymer functional groups such as oxygen, sulfur, phosphorus, nitrogen, and halogen derived from the low molecular weight compound (B) and the polyfunctional modifier (C) are used. This is the residue of the compound.
- the low molecular compound (B) has a low molecular compound having an alkali metal-nitrogen bond or an alkaline earth metal-nitrogen bond, an alkali metal-carbon bond or an alkaline earth metal-carbon bond. At least one low molecular weight compound having a molecular weight of 2000 or less selected from low molecular weight compounds containing an amino group is used.
- the low molecular weight compound having an alkali metal nitrogen bond or alkaline earth metal nitrogen bond includes a low molecular weight secondary amine, an alkali metal, an alkaline earth metal, an organic alkali metal compound, and an organic alkaline earth metal compound. Those obtained by reacting selected metals are preferred. Specifically, dimethylaminolithium, dihexylaminolithium, diisopropylaminolithium, hexamethyleneiminolithium and the like can be mentioned. Further, bisdiisopropylaminomagnesium and a mixture thereof are preferably used.
- a compound having an alkali metal-nitrogen bond can be obtained as a reaction product of a low molecular weight amide compound and an alkali metal compound. Specifically, it is a reaction product of N, N'-dimethylimidazolidinone and n-butyllithium.
- Examples of low molecular weight compounds having an alkali metal-carbon bond or an alkaline earth metal-carbon bond and containing an amino group include 3_ (N, N-dimethylamino) _1_propyllithium and 3_ (N, 1-propyllithium, 3_morpholino_1_propyllithium, 3_imidazo-lu 1_propyllithium, bis_3_ (N, N-dimethylamino) -1_propylmagnesium, bis-3-morpholino-1 Propyl magnesium, bis-3-imi Dazol-1-propylmagnesium, etc.Also, a low molecular weight compound having an alkali metal-nitrogen bond or alkaline earth metal-nitrogen bond or an amino acid having an alkali metal-carbon bond or an alkaline earth metal-carbon bond and containing an amino group Amino group-containing lithium hydrocarbons such as low molecular weight oligomers obtained by polymerizing butadiene, isopre
- These low molecular weight compounds (B) include a hydrocarbon group having a total of 41-140 carbon atoms or a hydrocarbon group having a total of 41-140 carbon atoms having a group inactive to an alkali metal-nitrogen bond.
- a metal-substituted compound of an amino group or an imino group having a group bonded thereto is preferred. More preferably, the carbon number is 20 or less.
- the molecular weight of the low molecular weight compound (B) is 2,000 or less. Preferably it is 1,000 or less. If the molecular weight is too large, the effects of the present invention cannot be obtained. More preferably, the molecular weight is 300 or less.
- a polyfunctional modifier having a molecular weight of 2,000 or less is used as the low molecular weight compound (C).
- the polyfunctional modifier is preferably an epoxy group, a carbonyl group, a carboxylic ester group, a carboxylic acid amide group, an acid anhydride group, a phosphoric ester group, a phosphite ester, an epithio group, a thiocarbonyl group, or a thiocarboxylic acid.
- the polyfunctional modifier (C) used in the present invention includes: The sum of the functional numbers of the above functional groups is 2 or more. Preferably, it is a polyfunctional modifier having a total of three or more functional groups.
- polyglycidyl ethers of polyhydric alcohols such as ethylene glycol diglycidyl ether and glycerin triglycidyl ether
- polyglycidyl ethers of aromatic compounds such as diglycidylated bisphenolenole A
- 1,4- Polyepoxy compounds such as diglycidylbenzene, 1,3,5-triglycidylbenzene, polyepoxidized liquid polybutadiene, 4,4, diglycidyldiphenylmethylamine, 4,4, -diglycidinole-dibenzylmethyl Epoxy-containing tertiary amines such as amines, diglycidyl diamine, diglycidyl ortho toluidine, tetraglycidyl metaxylene diamine, tetraglycidyl amino diphenyl methane, tetraglycidyl p_phenylenediamine, diglycidyl aminomethylcyclo Digly
- alkoxysilane compounds such as tetramethoxysilane, tetraethoxysilane, tetrabutoxysilane, and alkyltriphenoxysilane, N- (1,3-dimethylbutylidene) _3_ (triethoxysilyl) _1_propanamine , N- (1,3-dimethylbutylidene) _3_ (tributoxysilyl) — 1-propanamine, N— (l-methylpropylidene) -3- (triethoxysilyl) _1—propanamine, N-ethylidene 3-— Compounds having an imino group and an alkoxysilane group, such as ethoxysilyl) _1-propanamine, N- (3-triethoxysilylpropyl) -4,5-dihydroimidazole, may be mentioned.
- 2,4-tolylene diisocyanate 2,6_tolylene diisocyanate, diphenylmethane diisocyanate, diphenylethanediisocyanate, 1,3,5_benzenet And isocyanate conjugates such as lysocyanate.
- silicon tetrachloride silicon tetrabromide, silicon tetraiodide, monomethinoletrichlorosilane, monoethinoletrichlorochlorone, monobutinoletrichlorosiline, monomonomethine Halogenated silanes such as hexinoletrichlorosiloxane, monomethyltributyl molybdenum, and bistrichlorosilylethane And the like.
- Polyhalogenated phosphorus compounds such as tin compounds, trichlorophosphine and tribromophosphine; and phosphite compounds such as trisnoylphenyl phosphite, trimethyl phosphite and triethyl phosphite; and trimethyl phosphite.
- Phosphate compounds such as triethyl phosphate
- carboxylic acid ester compounds such as dimethyl adipate, getyl adipate, dimethyl terephthalate, getyl terephthalate, dimethyl phthalate, and dimethyl isophthalate; acids such as pyromellitic anhydride and styrene-maleic anhydride copolymer; Compounds containing anhydride groups, compounds containing amide groups such as bisdimethylamide adipate and dimethylamide polymethacrylate, and carbonyl groups containing 4,4'-diacetylbenzophenone and 3-acetylpropoxy trimethoxysilane Compounds, aryl vinyl group-containing compounds such as divinylbenzene, diisopropenylbenzene, and dibielbenzene oligomers; and halogenated hydrocarbons such as trifluoropropane, tribromopropane, tetrachlorobutane, and 3-chloropropoxytri
- a preferred polyfunctional modifier (C) is a polyepoxy compound. Particularly preferred is a polyfunctional modifier having a glycidinoleamino group as a functional group and having two or more epoxy groups in the molecule. Further, a compound having two or three diglycidylamino groups in one molecule is more preferable. For example, tetraglycidyl metaxylenediamine, tetraglycidylaminodiphenylmethane, tetraglycidyl-p-phenylenediamine, diglycidylaminomethylcyclohexane, tetraglycidyl-1,3-bisaminomethylcyclohexane, etc. It is.
- the molecular weight of the polyfunctional modifier (C) is 2,000 or less. Preferably it is 1,000 or less. If the molecular weight is too large, the effects of the present invention cannot be obtained.
- the polymer (A) which does not inhibit the reaction of the high molecular weight hydrocarbon polymer (A), the low molecular weight compound (B), and the polyfunctional modifier (C) is used as the inert solvent.
- a solvent for the polymerization is preferably used.
- one or a mixture of n-butane, n-pentane, n-hexane, n-heptane, cyclopentane, methinoresin pentane, cyclohexane, benzene, toluene and the like is preferable.
- unsaturated hydrocarbons having low reactivity with organometallic compounds such as 1-butene, cis-1-butene, and 2-hexene may be mixed.
- the amount of the inert solvent used is usually a high molecular weight hydrocarbon-based polymer (A).
- the polymerization reaction is activated to bond monomer units.
- the polar compound may be removed to change the mode or to change the reactivity ratio of the monomers in the copolymerization.
- a polar compound may be similarly added in the reaction of the high molecular weight hydrocarbon polymer (A), the low molecular weight compound (B) and the polyfunctional modifier (C).
- polar compounds examples include tetrahydrofuran, getyl ether, dioxane, ethylene glycol dimethyl ether, ethylene glycol dibutyl ether, dimethylene glycol dimethyl ether, diethylene glycol dibutyl ether, dimethoxybenzene, and 2,2_bis (2-oxorael) propane.
- Tertiary amine compounds such as ethers, tetramethylenoleethylenediamine, dipiveridinoethane, trimethinoleamine, triethynoleamine, pyridine, quinutalizine, potassium _t_amylate, potassium tert-butylate And phosphine conjugates such as triphenylphosphine and the like.
- These polar compounds can be used alone or in combination of two or more.
- the amount of the polar compound used is selected according to the purpose and the degree of the effect. Usually, it is usually 0.01 to 100 mol per mol of initiator.
- the weight average molecular weight of the modified hydrocarbon polymer of the present invention is 10,000 or more. Like Or less than 2 million, more preferably between 31 and 1.5 million.
- modifying group having a specific structure to be introduced into the polymer (N) is the number of moles of nitrogen atoms of the modifying group, and (c) is the number of moles of the functional group of the polyfunctional modifying agent. (c) A modifying group exceeding ⁇ i / 2. In that case, a polymer excellent in affinity with the inorganic filler, which is a feature of the present invention, can be obtained.
- the structure of the hydrocarbon polymer having a modifying group has the general formula: P - (C) - NR3 ⁇ 4 2 or P- (represented by -R-NI ⁇ R 2 (wherein, P: hydrocarbon polymer, (C): residue of a polyfunctional modifier, R, R 1 , R 2 : hydrocarbon group).
- the structure of the resulting hydrocarbon polymer having the modifying group is represented by the general formula: P_CR 5 R 6 _C (OH) R 4 -R -C (OH'-R-NR R 2 (where, P: a hydrocarbon polymer, R, R 1 , R 2 , R 3 : a hydrogen group or 0, S R 4 , R 5 , R 6 , R 7 : a compound selected from hydrogen, a hydrocarbon group or a hydrocarbon group having a substituent selected from O, S, N Base).
- an organic aminolithium as the low molecular compound (B) and to use a polyfunctional modifier (C) having two or more diglycidylamino groups as functional groups in the molecule as the polyfunctional modifier (C).
- a denaturing agent is used, and in particular, the excellent effects of the present invention can be obtained.
- a functional group that becomes> N—CH 2 —CH 2 (OH) 2 —N is generated in the modifying group.
- a mole of a metal-carbon bond of (A) (A + b) Zc is 0.05-1.5.5 as a total b mole of the metal-nitrogen bond and the metal-carbon bond of B) and c mole of the functional group of the polyfunctional modifier of (C).
- the reaction is carried out under the condition that a: b is 1: 0.05-20. Within this range, the excellent effects of the present invention are further exhibited.
- (a + b) / c is more preferably in the range of 0.21, most preferably in the range of 0.3-0.9, and the effect is further exhibited in these ranges.
- A: b is more preferably 1: 0.5-18, most preferably 1: 1-14, and in these ranges, further effects are exhibited. .
- (a + b) / c exceeds 1.5, unreacted (A) and (B) increase.
- the calculation of the c-mol of the functional group of the polyfunctional modifier of (C) is performed by multiplying the molar amount of the polyfunctional modifier of (C) by the number of functional groups per molecule as the c-mol of the functional group. It shall be used.
- a: c is 1: 1.2-10, and more preferably, a: c is 1: 1.
- the high molecular weight hydrocarbon polymer (A) used in the present invention more than 60% by weight of the entire polymer molecule has an alkali metal-carbon bond or an alkaline earth metal monocarbon bond. It is preferable to have one. In that case, an excellent modified polymer can be obtained in which a molecule exceeding 60% by weight of the obtained polymer molecule contains the functional group component of the present invention. More preferably, a high molecular weight hydrocarbon polymer (A) having a metal bond in at least 70% by weight of the molecule, and a polymer containing a functional group component in at least 70% by weight of the molecule from which the functional group is obtained. .
- a method for quantifying a polymer having a functional group component it can be measured by chromatography which can separate a modified component and a non-modified component containing a functional group.
- chromatography a method of using a GPC column containing a polar substance such as silica which adsorbs a functional group component as a filler and quantifying the non-adsorbed component by comparison with an internal standard is preferable.
- a solution of a high molecular weight hydrocarbon polymer (A) in an inert solvent, a low molecular compound (B) and a polyfunctional modifier (C) may be simultaneously added and reacted. You may react in order.
- a solution of the high molecular weight hydrocarbon polymer (A) in an inert solvent is added with the solution of the low molecular weight compound (B) or the inert solvent, and the mixture is uniformly stirred to obtain a multifunctional modified mixture.
- the polymer (A) is a hydrocarbon polymer having a double bond in the molecule
- the obtained hydrocarbon polymer having a functional group is further hydrogenated in an inert solvent.
- all or part of the double bond can be converted to a saturated hydrocarbon.
- the polymer (A) is a polymer composed of one or more monomer components selected from a conjugated diene compound and an aromatic vinyl compound
- all or a part of the double bond is saturated.
- the hydrogenation rate of the unsaturated double bond based on the conjugated gen can be arbitrarily selected according to the purpose, and is not particularly limited. In order to obtain a heat-shrinkable film having good heat resistance, heat stability and weather resistance, it exceeds 70%, preferably 75% or more, more preferably 75% or more of the unsaturated double bond based on the conjugated gen compound in the polymer. It is recommended that at least 85%, particularly preferably at least 90%, be hydrogenated. When a polymer having good thermal stability is obtained, the hydrogenation rate in the polymer is preferably 3 to 70%, more preferably 5 to 65%, and particularly preferably 10 60%.
- the hydrogenation rate of the aromatic double bond based on the vinyl aromatic hydrocarbon in the copolymer of conjugated gen and butyl aromatic hydrocarbon is not particularly limited, but the hydrogenation rate is 50% or less. It is preferably at most 30%, more preferably at most 20%.
- the rate of hydrogenation can be reduced by nuclear magnetic resonance (NMR).
- the hydrogenation method a known method can be used. Particularly preferred is a method in which hydrogenation is performed by blowing gaseous hydrogen into the polymer solution in the presence of a catalyst.
- the heterogeneous catalyst include a catalyst in which a precious metal is supported on a porous inorganic substance, a catalyst in which a salt such as nickel or cobalt is solubilized and reacted with an organic aluminum, or a meta-acetate such as titanocene.
- the used catalyst is used. Of these, titanocene catalysts that can select particularly mild hydrogenation conditions are preferred. Hydrogenation of an aromatic group is possible by using a supported catalyst of a noble metal.
- the hydrogenation catalyst examples include (l) a supported heterogeneous hydrogenation catalyst in which a metal such as Ni, Pt, Pd, and Ru is supported on carbon, silica, alumina, diatomaceous earth, and the like. 2) a so-called Ziegler-type hydrogenation catalyst using an organic acid salt such as Ni, Co, Fe, Cr or a transition metal salt such as acetylacetone salt and a reducing agent such as organic aluminum; (3) Ti, Ru, A homogeneous hydrogenation catalyst such as a so-called organometallic complex such as an organic metal compound such as Rh or Zr is used.
- JP-B-42-8704, JP-B-43-6636, JP-B-63-4841, JP-B 1-37970, JP-B1-53851, JP-B2 -9041 And hydrogenation catalysts described in JP-A-8-109219 can be used.
- Preferred hydrogenation catalysts include mixtures with titanocene compounds and / or reducing organometallic compounds.
- a reaction terminator can be added to a solution of the polymer having a modifying group in an inert solvent, if necessary.
- alcohols such as methanol, ethanol, and propanol
- organic acids such as stearic acid, lauric acid, and octanoic acid, and water are usually used.
- metals contained in the polymer can be demineralized, if necessary.
- a metal solution is extracted by bringing water, an organic acid, an inorganic acid, an oxidizing agent such as hydrogen peroxide or the like into contact with a polymer solution, and then the aqueous layer is separated. .
- an antioxidant to a solution of a polymer having a modifying group in an inert solvent.
- examples of the antioxidant include a phenol-based stabilizer, a phosphorus-based stabilizer, and a zeolite-based stabilizer.
- the method for obtaining the polymer from the polymer solution can be performed by a known method. For example, after separating the solvent with a steam stirrer, the polymer is separated by filtration, then dehydrated and dried to obtain the polymer, concentrated in a flushing tank, and deconcentrated in a vent extruder.
- the method of volatilization, the method of devolatilizing directly with a drum dryer, etc. can be adopted.
- the polymer having a specific modifying group of the present invention has excellent affinity for an inorganic filler, and exerts its effect when the inorganic filler is dispersed. It is also effective in bonding with inorganic compounds.
- Examples of the inorganic filler include natural silica, synthetic silica produced by a wet method or a dry method, kaolin, myriki, talc, clay, montmorillonite, zeolite, natural silicate, glass powder, glass fiber, and silicate.
- Ca salts such as calcium oxide and aluminum silicate, metal oxides such as alumina, titanium oxide, magnesium oxide, and zinc oxide; metal hydroxides such as calcium hydroxide, ethanol hydroxide, and magnesium hydroxide; and light calcium carbonate , Heavy calcium carbonate, various surface-treated calcium carbonates, metal carbonates such as magnesium carbonate, metal sulfates such as barium sulfate, magnesium sulfate, calcium sulfate, aluminum, aluminum Metal powder such as lons, carbon black and the like.
- a method for producing a composition of the polymer having a specific modifying group of the present invention and an inorganic filler a master prepared by previously mixing an inorganic filler with a polymer having a specific modifying group of the present invention is used. It is possible to use one batch.
- a method for producing a master batch a method of mixing in a solution or a method of kneading with a mixer can be used.
- a filler selected from the group consisting of a silica-based inorganic filler, a metal oxide and a metal hydroxide is dispersed in the polymer having a modifying group of the present invention.
- a filler selected from the group consisting of a silica-based inorganic filler, a metal oxide and a metal hydroxide is added to 100 parts by weight of the hydrocarbon polymer having a modifying group obtained by the method of the present invention. It is a composition in which 200 parts are dispersed.
- a synthetic silica having a primary particle diameter of 50 nm or less is used as a silica-based inorganic filler.
- the filler is quickly and uniformly dispersed in fine particles with good reproducibility by kneading for a short time, and the physical properties obtained are extremely favorable.
- the temperature is set to 120 ° C or more. This is a method of kneading at a temperature of 250 ° C or less.
- polymer (A) Use conjugated gen or a combination of conjugated gen and styrene as a monomer, and obtain a living conjugated homopolymer or a living random copolymer of conjugated gen and styrene in an inert solvent using an organic monolithium compound as an initiator. .
- This is designated as polymer (A).
- the polymer (A) has a glass transition temperature in the range of -100 ° C force and -20 ° C, and the ratio of 1,4_ bonds to 1, 2, or 3,4 bonds in the conjugated moiety is 10% 90% to 90%. 90% is 10%.
- the chain distribution of styrene in the copolymer is a completely random structure.
- the isolated styrene (1 unit of styrene) is 50% by weight or more of the total bound styrene
- the chain styrene (a series of 8 or more styrenes) is 5% by weight or less of the total bound styrene. , Preferably 2.5% by weight or less.
- the living polymer (A) preferably lithium amide Mix the mixture as (B) and stir to mix uniformly. Further, a predetermined amount of a polyepoxy conjugate having 3 or more functions, preferably 4 to 6 functions is added as (C), and the mixture is stirred and reacted instantaneously.
- the obtained polymer is a polymer having a hydroxyl group, an amino group, and an epoxy group at an end in an arbitrary ratio.
- the molecular weight of the polymer is controlled according to the use and purpose. Normally, the raw rubber for vulcanized rubber is controlled to Mooney viscosity (100 ° C 1 + 4 minutes) 20-100. When the Mooney viscosity is high, the oil is usually extended with an extender oil to fall within this range.
- the extender oil, Aroma oil, naphthenic oil, paraffinic oil, furthermore, Ding 0 eight shown in Kautschuk Kunststoff Kunststoffstof £ 6 52 (12 ) 799 (1999) £, extender oils, such as MES are preferably used, these, It is an oil containing less than 3% by weight of a polycyclic aroma component specified in IP346.
- the amount of extender oil used is arbitrary. Normally 1050 parts by weight per 100 parts by weight of polymer. Generally, 20-37.5 parts by weight are used.
- a silica-based inorganic filler When used for vulcanized rubber applications such as automobile parts such as tires and vibration-proof rubber, and shoes, etc., a silica-based inorganic filler is preferably used as a reinforcing agent, and particularly when the primary particle diameter is 50 nm or less. Certain synthetic kaic acids are preferred. As the synthetic kaic acid, wet silica and dry silica are preferably used.
- carbon black can also be used.
- the carbon black is not particularly limited, and examples thereof include furnace black, acetylene black, thermal black, channel black, and graphite. Of these, furnace black is particularly preferred.
- a vulcanized rubber composition comprising 100 parts by weight of the polymer of the present invention and 100 parts by weight of silica particles and 0 to 50 parts by weight of carbon black is preferable. More preferably, it is a vulcanized rubber composition comprising 100 parts by weight of the polymer of the present invention and 100 parts by weight of silica-based particles and 150 parts by weight of carbon black.
- the dispersibility of the inorganic filler is very stable, and the performance of the vulcanized rubber is excellent.
- inorganic fillers particularly silica
- a rubber having a small storage elastic modulus with little dependency on strain can be obtained.
- a better balance between low rolling resistance and wet skid resistance and wear resistance It is possible to improve the strength, improve the rate of decrease in modulus at high temperature, etc., and obtain a composition suitable for rubber for tires, vibration-proof rubber, footwear, and the like.
- the polymer of the present invention is used alone or, if necessary, mixed with another rubber.
- an excessively small proportion of the polymer of the present invention is not preferable because the effect of the modification of the present invention is not sufficiently exhibited.
- Other rubbers include, for example, natural rubber, polyisoprene rubber, emulsion-polymerized styrene-butadiene copolymer rubber, solution-polymerized random SBR (bonded styrene 50% by weight, 1,2-butyl bond amount of butadiene bond unit part 10%).
- high-trans SBR (1,4-trans bond amount of the butadiene binding unit 70-95%), low cis polybutadiene rubber, high cis polybutadiene rubber, high trans polybutadiene rubber (1,4_trans of the butadiene binding unit) Styrene-isoprene copolymer rubber, butadiene-isoprene copolymer rubber, solution polymerization random styrene-butadiene-isoprene copolymer rubber, emulsion polymerization random styrene-butadiene-isoprene copolymer rubber, emulsion polymerization Styrene-acrylonitrile-butadiene copolymer rubber, acrylonitrile-butadiene Emissions copolymer rubber, high Biel SBR- low vinyl SBR block copolymer rubber, and polystyrene first block copolymer such as polybutadiene one polystyrene block cop
- the ratio of each component is usually 10-95: 90-5, preferably 20-90: 80-10, by weight ratio. More preferably, it is in the range of 30-80: 70-20.
- the power that any rubber other than the present invention can use Preferably, rubber, cis polybutadiene rubber, solution polymerization SBR, solution polymerization SIBR, emulsion polymerization SBR, natural rubber, polyisoprene rubber, VCR, IIR, Halogenated IIR, and the like.
- the rubber compounding agent for example, a silane coupling agent, a reinforcing agent, a vulcanizing agent, a vulcanization accelerator, a vulcanization aid, an oil and the like can be used.
- silane coupling agent a compound having alkoxysilane in the molecule and further having a polysulfide bond is preferably used.
- TESPT bis- (3-triethoxysilyl-propyl) tetrasulfide
- Id bis- (3-triethoxysilyl-propyl) disulfate
- the vulcanizing agent is not particularly limited, and examples thereof include sulfur such as powdered sulfur, precipitated sulfur, colloidal sulfur, insoluble sulfur, and highly dispersible sulfur, and sulfur monochloride and sulfur dichloride.
- sulfur such as powdered sulfur, precipitated sulfur, colloidal sulfur, insoluble sulfur, and highly dispersible sulfur, and sulfur monochloride and sulfur dichloride.
- Organic peroxides such as sulfur halides, dicumyl peroxide, ditertiary butyl peroxide and the like can be mentioned.
- powdered sulfur in which sulfur is preferred, is particularly preferred.
- the compounding ratio of the vulcanizing agent is usually 0.115 parts by weight, preferably 0.3-10 parts by weight, more preferably 0.55 parts by weight with respect to 100 parts by weight of the rubber component. .
- Examples of the vulcanization accelerator include sulfenamide-based, thioperia-based, thiazole-based, dithiol-rubic acid-based, and xanthogenic acid-based vulcanization accelerators.
- the compounding ratio of the vulcanization accelerator is usually 0.1 to 15 parts by weight, preferably 0.3 to 10 parts by weight, more preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the rubber component. is there.
- the vulcanization aid is not particularly limited, and for example, stearic acid, zinc oxide, or the like can be used.
- extender oils such as aroma, naphthene, paraffin, and silicone are selected according to the application.
- the amount of extender oil used is usually in the range of 1 to 150 parts by weight, preferably 2 to 100 parts by weight, more preferably 3 to 60 parts by weight, per 100 parts by weight of the rubber component. When the amount of oil used is within this range, the dispersion effect of the reinforcing agent, tensile strength, wear resistance, heat resistance, etc. are balanced to high values.
- a composition using the rubber of the present invention may further contain a filler such as calcium carbonate or talc, an amine-based phenol-based antioxidant, an ozone-deterioration inhibitor, in accordance with a conventional method.
- a filler such as calcium carbonate or talc, an amine-based phenol-based antioxidant, an ozone-deterioration inhibitor, in accordance with a conventional method.
- Activating agents such as silane coupling agents and diethylene glycol, processing aids, tackifiers, and other compounding agents such as waxes can be contained in necessary amounts.
- composition using the rubber of the present invention is produced by mixing the above components using a known rubber kneading machine, for example, a roll or a Bannolly mixer.
- the amount of bound styrene was 25% by weight
- the amount of bound butadiene was 75%
- the Mooney viscosity of the polymer was 70.
- the 1,2-bond amount of the microstructure of the butadiene portion calculated from the measurement results using an infrared spectrophotometer according to the Hampton method was 61%
- the molecular weight in terms of polystyrene by GPC measurement was the weight average molecular weight ( (Mw) was 594,000
- the number average molecular weight (Mn) was 420,000 and the molecular weight distribution was trimodal
- (Mw / Mn) was 1.48.
- the denaturation rate determined by GPC using a silica-based adsorption column was 84%.
- sample J is an equimolar reaction product of hexamethyleneimine and n-butyllithium as an alkali metal-nitrogen bonding compound
- sample I is DMI (dimethyl imidazolidinone).
- the copolymers of the present invention are samples (A), (C), (D), (E), (F), (G), (I), and CO.
- (B) and (H) are copolymers outside the present invention, in which no compound having an alkali (or alkaline earth metal) -nitrogen bond was used.
- n_butyllithium and static mixer Immediately before entering the first reactor, it was mixed with n_butyllithium and static mixer at a rate of 0.003 gZ (0.0469 mmol) just before entering the first reactor, and then continuously mixed at the bottom of the first reactor.
- 2,2-bis (2-oxoral) propane as a polar substance at a rate of 0.015 gZ
- n-butyllithium as a polymerization initiator at 0.009 g / min (0.141 mmol / min).
- the polymer solution was continuously withdrawn from the top of the first reactor and supplied to the second reactor.
- An antioxidant (BHT) was continuously added to the modified polymer solution at a rate of 0.05 g / min (n-xane solution) to terminate the modification reaction. Thereafter, the solvent was removed, and the modified copolymer was removed. Obtained.
- the Mooney viscosity of the copolymer after this modification was 165.
- 37.5 parts by weight of an aromatic oil (X-140 manufactured by Japan Energy Co., Ltd.) was added to this copolymer solution to obtain an oil-extended copolymer (Sample L) per 100 parts by weight of the polymer.
- the Mooney viscosity of the obtained oil-extended copolymer was 73.
- the amount of bound styrene of this copolymer was 35%, and the amount of bound butadiene was 65%. From the measurement results using an infrared spectrophotometer, the amount of 12_ bonds in the butadiene portion calculated and calculated according to the Hampton method was 38%.
- the weight average molecular weight (Mw) measured by GPC using THF as a solvent was 900,000, and the molecular weight distribution (Mw / Mn) was 2.00.
- the modification ratio of the modified copolymer was 82%.
- Pre-oil extension of high molecular weight that is, high Mooney viscosity
- an aromatic oil (X-140 manufactured by Japan Energy Co., Ltd.) was added to the copolymer solution to obtain an oil-extended copolymer (sample K).
- the Mooney viscosity of the obtained oil-extended copolymer was 63.
- the amount of bound styrene and the amount of 1,2-bonded butadiene were the same as the sample (L).
- the weight average molecular weight (Mw) by GPC measurement using THF as a solvent was 800,000, and the molecular weight distribution (Mw / Mn) was 1.90.
- the modification rate of the modified copolymer was 81%. It can be seen that the addition of diisopropyllithium amide binds the low molecular weight amino group to the modifier and suppresses the coupling reaction, resulting in a decrease in Mooney viscosity.
- sample Q is an equimolar reaction product of hexamethyleneimine and n-butyllithium as an alkali metal nitrogen-bonding compound
- sample T is DMI (dimethylimidazolidyne).
- the copolymers of the present invention were samples (K), ( ⁇ ), ( ⁇ ), ( ⁇ ), ( ⁇ ), ( ⁇ ),
- the molecular weight of the copolymer before modification was 19,000
- the molecular weight of one molecule-modified styrene block in the styrene block analysis sample was 22,100
- the modification rate of the copolymer was 74%.
- the coupling rate which is the sum of the two-molecule pulling modification, the three-molecule pulling modification, and the four-molecule pulling modification, was 61%, and the one-molecule modification of the copolymer was 13%.
- the Mooney viscosity (ML1 + 4, 100 ° C.) of this modified rubber was 72.
- Styrene block analysis after the completion of the polymerization reaction confirmed that about 30% of the latter half of the polymer was a tapered terminal styrene block copolymer.
- the Mooney viscosity (ML1 + 4, 100 ° C) of the modified rubber was 73.
- Example X was polymerized in the same manner as (Sample W), and after the polymerization was completed, 8.333 mmol of diisopropyldimethylamide was added to the polymerization vessel, and tetraglycidyl 1,3-bisaminomethylcyclohexane was added. Is a modified copolymer obtained by the addition of 6.284 mmol for 10 minutes. The Mooney viscosity (ML1 + 4, 100 ° C) of the modified rubber was 62. It can be seen that the addition of diisopropyl periodamide bound the amino group of the low molecular weight residue of lithium amide to the modifier, resulting in a decrease in Mooney viscosity.
- the analytical values of the modified rubber has a bound styrene content 10.0 wt 0/0, styrene block amount 9.
- the molecular weight of the copolymer before modification was 1220,000
- the molecular weight of the styrene block was 9,500
- the modification rate of the copolymer was 86%.
- the coupling rate which is the sum of the two-molecule coupling modification, the three-molecule coupling modification, and the four-molecule coupling modification, was 79%, and the one-molecule modification of the copolymer was 7%.
- the Mooney $ occupancy (ML1 +4, 100.C) of the quasi-rubber was 60.
- Example Z was polymerized in the same manner as (Sample Y), and after the polymerization was completed, 7.422 mmol of diisopropyldimethylamide was added to the polymerization vessel, and tetraglycidyl-1,3-bisaminomethylcyclohexane was added. Is a modified copolymer obtained by the addition of 7.422 mmol and a denaturing reaction for 10 minutes.
- the Mooney viscosity (ML1 + 4, 100 ° C) of the modified rubber was 54. It can be seen that the addition of diisopropyl periodamide bound the amino group of the low molecular weight residue of lithium amide to the modifier, resulting in a decrease in Mooney viscosity.
- the copolymers of the present invention are Samples (V), (X) and (Z), and Samples (U), (W) and (Y) are outside the scope of the present invention.
- the analysis of the sample was performed by the following method.
- the sample was used as a chromate-form solution, and the absorbance at 254 nm of the styrene The amount of bound styrene (wt%) was measured.
- the sample was used as a carbon disulfide solution, and the infrared spectrum was measured in the range of 600 1000 cm-1 using a solution cell, and the microstructure of the butadiene portion was determined from the predetermined absorbance according to the Hampton's method.
- Chromatograms were measured using GPC using three columns connected with polystyrene gel as a packing material, and the molecular weight and molecular weight distribution were calculated using a calibration curve using standard polystyrene.
- the solvent used was tetrahydrofuran.
- An autoclave with an inner volume of 10 liters, an inlet at the bottom, an outlet at the top, a stirrer and an autoclave with a jacket for temperature control is connected in series as two reactors, and a static is connected between the two reactors
- a mixer was installed. 16.4 g / min of butadiene from which impurities have been removed in advance, 3.6 g / min of styrene, and 97.6 g / min of hexane are mixed, and the mixed solution is passed through a dehydration column filled with activated alumina, and further mixed.
- n-butyllithium 0.035 g / min (0.547 mmol), and the temperature in the reactor was maintained at 85 ° C.
- the polymer solution was continuously withdrawn from the top of the first reactor and supplied to the second reactor. However, the polymerization rate at the first outlet reached about 100%.
- the temperature of the second reactor was kept at 80 ° C, and tetraglycidyl-1,3-bisaminomethylcyclohexane, a tetrafunctional polyepoxy conjugate, was added at a rate of 0.273 mmol / min. Was added from the bottom to perform a denaturation reaction.
- An antioxidant (BHT) was continuously added to the modified polymer solution at a concentration of 0.05 gZ (n-hexane solution) to terminate the modification reaction, and then the solvent was removed to obtain a modified copolymer.
- BHT n-hexane solution
- the 1,2 bond content of the butadiene moiety calculated from the measurement results using an infrared spectrophotometer according to the Hampton method was 31%.
- the weight average molecular weight (Mw) determined by GPC measurement using THF as a solvent was 320,000 and the molecular weight distribution (Mw / Mn) was 1.95.
- the modification rate of the modified copolymer was 86%. Without adding an antioxidant to this modified copolymer, 7.5 liters of the modified copolymer solution was received in a hydrogenation reactor (10 liters), and the hydrogenation catalyst described later was added to 100 parts by weight of the modified copolymer.
- Copolymer was prepared in the same manner as (Sample A1) except that 0.469 mmol / min of n-butyllithium was supplied as a polymerization initiator and 2,2-bis (2-oxorael) propane was supplied at a rate of 0.015 g / min as a polar substance. After obtaining the polymer, diisopropyl lithium amide was added at a rate of 0.469 mmol / min to the copolymer solution that continuously flows into the static mixer installed between the first and second units. Mixed within. The denaturation reaction with tetraglycidyl 1,3-bisaminomethylcyclohexane in the second group was performed at a rate of 0.469 mmol / min.
- Example A3 was polymerized by changing the amount of n-butyllithium and the polar substance used in the polymerization, and without performing the transformation reaction, using the same method as that used to obtain (Sample A1 and Sample A2). It is a hydrogenated unmodified copolymer obtained by hydrogenation and solvent removal. Its weight-average molecular weight (Mw) is 339,000, its molecular weight distribution (Mw / Mn) is 1.80, The attachment rate was 82%. The preparation results are shown in Table 4.
- the hydrogenated modified copolymer of the present invention is sample (A2), and samples (A1) and (A3) are outside the scope of the present invention.
- the preparation of the hydrogenation catalyst and the measurement of the hydrogenation rate of the butadiene portion were carried out by the following methods.
- the measurement was performed using a nuclear magnetic resonance apparatus (DPX-400, manufactured by BRUKER, Germany).
- Example A-Sample J the rubber compound was obtained by the following kneading method using the compounding shown in Table 5.
- Examples 18 to 18 and Comparative Examples 12 and 12 were performed with the sample alone, and Examples 9 and Comparative Example 3 were performed with the rubber components (Sample A) and (Sample 75 parts by weight and polybutadiene rubber 25 parts by weight).
- the first stage kneading was performed under the conditions of a filling rate of 65% and a rotor rotation speed of 66/77 rpm.
- Filler sica and carbon black
- organic silane coupling agent organic silane coupling agent
- aromatic oil organic oil
- zinc white zinc white
- stearic acid aric acid
- the mixture obtained above was cooled to room temperature, an antioxidant was added, and the mixture was kneaded again to improve the dispersion of silica. Also in this case, the discharge temperature (mixture) was adjusted to 155 to 160 ° C by controlling the temperature of the mixer.
- Aromatic oil (Japan Energy X149) 5.0 parts Zinc flower 3.0 parts
- Anti-aging agent N-isophenyl propyl-N, -phenyl-P-phenylene ', amine
- Vulcanization accelerator N-cyclohexyl_2_so "thiashi ', rusulfenamide
- Example 9 and Comparative Example 3 were carried out in a 75/25 blend system of copolymers A and B and high cis polybutadiene rubber.
- the measurement was performed at a frequency of 10 Hz by a torsion method using an Ares viscoelasticity tester manufactured by Rheometrics.
- the Payne effect (AG ') was shown as the difference between the minimum and maximum values at distortions of 0.1% to 10%.
- the lower the Pain effect the better the dispersibility of fillers such as silica.
- the rebound resilience at 50 ° C was measured by the Lupke rebound resilience test method according to JIS ⁇ 6255. As shown in Table 6, Examples 1-5, Comparative Example 1, and Example 6 differing in the amount of bound styrene and vinyl bound. Based on the results of Comparative Example 8 and Comparative Example 2, the composition of the present invention has a low Tan ⁇ at a high temperature (50 ° C) as compared to the comparative example, a small hysteresis loss, a reduced rolling resistance of the tire, and a low fuel consumption. Can be improved. Also, the balance between low temperature (0 ° C) Tan ⁇ and high temperature (50 ° C) Tan ⁇ is good, and the balance between wet skid resistance and fuel efficiency of the tire is excellent.
- the dispersibility of silica which has a low elastic modulus and a very small strain dependency, is improved. Due to this effect, the rolling force S For applications where filler such as silica is required to be dispersed, or for all applications where low hysteresis loss is required, or for applications where abrasion resistance is greatly affected by dispersibility it can. It can be widely used not only for tires but also for shoes, anti-vibration rubber and other industrial products.
- Aromatic oil (Japan Energy X149) 37.5
- Anti-aging agent N-isopropyl.-N, -phenyl-P-phenylene, amine
- Vulcanization accelerator N-cyclohexyl_2_so "thiashi ', rusulfenamide
- Vulcanization accelerator diphenyldanidine 2.0 parts [] [ ⁇ ] 01329
- Example 10 Example 11 Example 12 Example 13 Example 14 Example 15 Comparative Example 4
- Example 18 and Comparative Example 7 were carried out in a 75/25 blend system of copolymer M and high cis polybutadiene rubber.
- Examples 10 to 18 and Comparative Examples 4 to 16 show the effect of the present invention with a relatively high filler content by using a sample oil-extended in a high molecular weight copolymer in continuous polymerization.
- Example 10 As shown in Tables 8 and 9, the composition of the present invention was found to be different from the results of Example 10-15, Comparative Example 4, and Example 16 17 and Comparative Example 5 in which the amount of bound styrene and the amount of vinyl bond were different. Tan ⁇ at high temperature (50 ° C) is lower than that of the comparative example. Hysteresis loss is small. Rolling resistance of the tire can be reduced, and fuel efficiency can be improved. Also, the balance between low temperature (0 ° C) Tan S and high temperature (50 ° C) Tan ⁇ is good, and the balance between wet skid resistance and fuel efficiency of the tire is excellent.
- the composition of the present invention has improved silica dispersibility, in which the strain dependence of the elastic modulus is very small, as compared with Comparative Examples.
- the compounding amount of silicic acid can be further increased, and it can be applied to various kinds of compounds and various uses. It is suitable for various industrial products such as tires and belts.
- Anti-aging agent styrenated phenol 1.0 part 1.7 parts of sulfur
- vulcanization accelerator Si, Nso ', Chiashi, Rushi, Sulphide
- vulcanization accelerator Si-Fenyl Danishin
- Tan ⁇ at 0 ° C 50 ° C 70 ° C was measured by a torsion method at a frequency of 10 Hz using an Ares viscoelasticity tester manufactured by Rheometrics, and calculated by the following equation. [0140]
- the strain dependence is a value calculated by (10% tan 5 -0.1% tan ⁇ at 50 ° C) X 100 (%) / 0.1% tan 5.
- the abrasion resistance was measured using an Akron abrasion tester at a load of 6 lbs and at 1,000 revolutions.
- the copolymer of the present invention has excellent performance even in a styrene-butadiene copolymer having a styrene block. Comparing Example 19 with Comparative Example 7, Example 20 with Comparative Example 8, and Example 21 with Comparative Example 9, it was found that the composition using the copolymer of the present invention had a modulus of elasticity (G ′) and a distortion of Tan ⁇ . Dependence is small. Temperature dependence is small. In addition, it has excellent properties due to improved dispersibility of silica, such as good heat build-up and good abrasion resistance and small compression set.
- the modified rubber composition of the present invention makes use of such characteristics and is suitable for footwear applications including vibration-proof rubber applications and transparent formulations containing silica.
- the modified rubber composition of the present invention having such excellent properties can be suitably used for other industrial articles and the like.
- Paraffin oil (manufactured by Idemitsu Kosan Co. (Ltd.) PW_ 38 ⁇ ) 20.0 parts
- vulcanization accelerator tetramethyl radish “sulfide”
- vulcanization accelerator 2-mercaptohexanone “thiazole”
- a 180-degree peel test in accordance with JIS K-1256 was performed, and the peel strength of rubber bonded to metal was measured.
- As the primer Metalok G and Metalok PH-50 (manufactured by Toyo Chemical Laboratory Co., Ltd., Japan) were used.
- the hydrogenated modified copolymer of the present invention has further improved strain dependence of the elastic modulus in the viscoelastic properties, has excellent compression set and rebound resilience, and has good compatibility with metals.
- the adhesion is also good.
- the hydrocarbon polymer having a functional group obtained by the present invention is one in which the inorganic filler is dispersed with a uniform and fine particle diameter in a high molecular weight hydrocarbon polymer matrix. High performance is exhibited.
- the high molecular weight hydrocarbon polymer is a rubbery polymer
- inorganic fillers such as silica and carbon black are uniformly dispersed, and when vulcanized rubber is used, the rolling resistance is lower than in conventional tire tread applications. It is suitable for tire rubber, vibration-proof rubber, footwear, etc. It becomes a composition.
- inorganic fillers such as silica, metal oxides and metal hydroxides are uniformly dispersed, thereby improving strength and flame retardancy more than before. , Increase elongation
- effects such as improvement in the gripping of aggregates can be obtained.
- the high molecular weight hydrocarbon polymer is a thermoplastic elastomer or a thermoplastic resin, a uniform and fine dispersion can be obtained with improved compatibility in a composition with other polar resins. .
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
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Abstract
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006274010A (ja) * | 2005-03-29 | 2006-10-12 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体の製造法 |
JP2007056107A (ja) * | 2005-08-23 | 2007-03-08 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物およびそれからなる補強層を有するランフラットタイヤ |
JP2008208163A (ja) * | 2007-02-23 | 2008-09-11 | Bridgestone Corp | 変性重合体、それを用いたゴム組成物及びタイヤ |
JP2008248203A (ja) * | 2007-03-30 | 2008-10-16 | Asahi Kasei Chemicals Corp | 無機充填剤との親和性に優れた変性重合体及びその製造方法ならびにその組成物 |
US8278395B2 (en) | 2007-03-28 | 2012-10-02 | Asahi Kasei Chemicals Corporation | Process for manufacturing modified conjugated diene polymer, composition comprising the polymer, and tire comprising the composition |
US8816014B2 (en) | 2009-10-02 | 2014-08-26 | Asahi Kasei Chemicals Corporation | Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and modified conjugated diene-based polymer composition |
US9193807B2 (en) | 2010-04-16 | 2015-11-24 | Asahi Kasei Chemicals Corporation | Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and modified conjugated diene-based polymer composition |
US10160847B2 (en) | 2010-11-26 | 2018-12-25 | Compagnie Generale Des Etablissments Michelin | Tyre tread |
JP2020105378A (ja) * | 2018-12-27 | 2020-07-09 | Toyo Tire株式会社 | タイヤ用ゴム組成物、及びそれを用いた空気入りタイヤ |
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JPH07330959A (ja) * | 1994-06-03 | 1995-12-19 | Toyo Tire & Rubber Co Ltd | タイヤトレッド用ゴム組成物 |
WO2001023467A1 (fr) * | 1999-09-27 | 2001-04-05 | Asahi Kasei Kabushiki Kaisha | Composition de caoutchouc |
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JP4726314B2 (ja) * | 2001-03-23 | 2011-07-20 | 旭化成ケミカルズ株式会社 | 変性共役ジエン系重合体組成物 |
JP4863566B2 (ja) * | 2001-03-26 | 2012-01-25 | 旭化成ケミカルズ株式会社 | 変性共役ジエン系重合体の製造方法 |
JP4895521B2 (ja) * | 2005-03-29 | 2012-03-14 | 旭化成ケミカルズ株式会社 | 変性共役ジエン系重合体の製造法 |
CN101155868A (zh) * | 2005-03-29 | 2008-04-02 | 旭化成化学株式会社 | 改性的丁二烯类聚合物组合物 |
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- 2004-12-15 KR KR20067011693A patent/KR100726911B1/ko active IP Right Grant
- 2004-12-15 CN CNB2004800374377A patent/CN100436487C/zh active Active
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07330959A (ja) * | 1994-06-03 | 1995-12-19 | Toyo Tire & Rubber Co Ltd | タイヤトレッド用ゴム組成物 |
WO2001023467A1 (fr) * | 1999-09-27 | 2001-04-05 | Asahi Kasei Kabushiki Kaisha | Composition de caoutchouc |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006274010A (ja) * | 2005-03-29 | 2006-10-12 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体の製造法 |
JP2007056107A (ja) * | 2005-08-23 | 2007-03-08 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物およびそれからなる補強層を有するランフラットタイヤ |
JP2008208163A (ja) * | 2007-02-23 | 2008-09-11 | Bridgestone Corp | 変性重合体、それを用いたゴム組成物及びタイヤ |
US8278395B2 (en) | 2007-03-28 | 2012-10-02 | Asahi Kasei Chemicals Corporation | Process for manufacturing modified conjugated diene polymer, composition comprising the polymer, and tire comprising the composition |
JP2008248203A (ja) * | 2007-03-30 | 2008-10-16 | Asahi Kasei Chemicals Corp | 無機充填剤との親和性に優れた変性重合体及びその製造方法ならびにその組成物 |
US8816014B2 (en) | 2009-10-02 | 2014-08-26 | Asahi Kasei Chemicals Corporation | Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and modified conjugated diene-based polymer composition |
US9193807B2 (en) | 2010-04-16 | 2015-11-24 | Asahi Kasei Chemicals Corporation | Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and modified conjugated diene-based polymer composition |
US9644046B2 (en) | 2010-04-16 | 2017-05-09 | Asahi Kasei Chemicals Corporation | Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and modified conjugated diene-based polymer composition |
US10160847B2 (en) | 2010-11-26 | 2018-12-25 | Compagnie Generale Des Etablissments Michelin | Tyre tread |
JP2020105378A (ja) * | 2018-12-27 | 2020-07-09 | Toyo Tire株式会社 | タイヤ用ゴム組成物、及びそれを用いた空気入りタイヤ |
JP7174620B2 (ja) | 2018-12-27 | 2022-11-17 | Toyo Tire株式会社 | タイヤ用ゴム組成物、及びそれを用いた空気入りタイヤ |
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CN100436487C (zh) | 2008-11-26 |
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KR20060111568A (ko) | 2006-10-27 |
CN1894288A (zh) | 2007-01-10 |
KR100726911B1 (ko) | 2007-06-11 |
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