WO2021107717A1 - 변성 공액디엔계 중합체 - Google Patents
변성 공액디엔계 중합체 Download PDFInfo
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- WO2021107717A1 WO2021107717A1 PCT/KR2020/017182 KR2020017182W WO2021107717A1 WO 2021107717 A1 WO2021107717 A1 WO 2021107717A1 KR 2020017182 W KR2020017182 W KR 2020017182W WO 2021107717 A1 WO2021107717 A1 WO 2021107717A1
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- IMFACGCPASFAPR-UHFFFAOYSA-N CCCCN(CCCC)CCCC Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- ARGWEHNDRNQHCH-UHFFFAOYSA-N CCCCN(CCCC)CCC[SiH-](OC)(O[Si-](OC)OC)O[Si+](CCCN(CCCC)CCCC)(OC)OC Chemical compound CCCCN(CCCC)CCC[SiH-](OC)(O[Si-](OC)OC)O[Si+](CCCN(CCCC)CCCC)(OC)OC ARGWEHNDRNQHCH-UHFFFAOYSA-N 0.000 description 1
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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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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
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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
- C08C19/22—Incorporating nitrogen atoms into the molecule
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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
- C08C19/30—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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2810/00—Chemical modification of a polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Definitions
- the present invention relates to a modified conjugated diene-based polymer having excellent processability and excellent tensile properties and viscoelastic properties.
- a conjugated diene-based polymer having low rolling resistance, excellent abrasion resistance, and excellent tensile properties, as well as adjustment stability typified by wet road resistance is required as a rubber material for tires.
- conjugated diene-based polymers or copolymers such as styrene-butadiene rubber (hereinafter referred to as SBR) or butadiene rubber (hereinafter referred to as BR) have been manufactured by emulsion polymerization or solution polymerization and are used as rubber for tires. .
- SBR styrene-butadiene rubber
- BR butadiene rubber
- the greatest advantage of solution polymerization compared to emulsion polymerization is that the content of vinyl structure and styrene content defining rubber properties can be arbitrarily adjusted, and molecular weight and physical properties can be adjusted by coupling or modification. that it can be adjusted. Therefore, it is easy to change the structure of the finally manufactured SBR or BR, and it is possible to reduce the movement of the chain ends by binding or modifying the chain ends and increase the binding force with fillers such as silica or carbon black. It is widely used as a rubber material for
- this solution-polymerized SBR is used as a rubber material for a tire
- the glass transition temperature of the rubber can be increased to adjust the required physical properties of the tire such as running resistance and braking force, as well as lower the glass transition temperature.
- fuel consumption can be reduced.
- the solution polymerization SBR is prepared using an anionic polymerization initiator, and the chain ends of the formed polymer are bound or modified using various modifiers. For example, U.S. Patent No.
- 4,397,994 discloses a technique in which an active anion at the chain end of a polymer obtained by polymerizing styrene-butadiene in a non-polar solvent using alkyllithium, a monofunctional initiator, is combined using a binder such as a tin compound. did.
- the polymerization of SBR or BR may be carried out by batch or continuous polymerization.
- the molecular weight distribution of the prepared polymer is narrow, which is advantageous in terms of improving physical properties, but the productivity is low and , there is a problem of poor processability, and in the case of continuous polymerization, the polymerization is continuously performed and thus the productivity is excellent and there are advantages in terms of processability improvement, but there is a problem in that the physical properties are poor because the molecular weight distribution is wide. Accordingly, there is a continuous demand for research to improve all of the productivity, processability and physical properties at the time of manufacturing SBR or BR.
- Patent Document 1 US4397994 A
- Patent Document 2 JP1994-271706 A
- the present invention has been devised to solve the problems of the prior art, and it is to provide a modified conjugated diene-based polymer that is manufactured by continuous polymerization and has excellent processability, excellent physical properties such as tensile properties, and excellent viscoelastic properties. The purpose.
- the present invention has a molecular weight distribution curve by gel permeation chromatography (GPC) has a unimodal form, and a molecular weight distribution (PDI; MWD) is 1.0 or more and less than 1.7, and includes a functional group derived from a modifier represented by the following formula (1) at one end, and provides a modified conjugated diene-based polymer comprising a functional group derived from a modification initiator at the other end:
- GPC gel permeation chromatography
- MWD molecular weight distribution
- R 1 to R 8 are each independently an alkyl group having 1 to 20 carbon atoms; L 1 and L 2 are each independently an alkylene group having 1 to 20 carbon atoms; n is an integer from 2 to 4.
- the modified conjugated diene-based polymer according to the present invention is produced by continuous polymerization with controlled polymerization conversion, so that the molecular weight distribution curve by gel permeation chromatography has a unimodal shape and the molecular weight distribution is narrow as less than 1.7, thus processability is It has excellent tensile properties and viscoelastic properties while being excellent.
- modified conjugated diene-based polymer according to the present invention may further improve viscoelastic properties by including a functional group derived from a modification initiator at one end and a functional group derived from a modifier at the other end.
- Example 1 shows a molecular weight distribution curve by gel permeation chromatography (GPC) of the modified conjugated diene-based polymer of Example 1 according to an embodiment of the present invention.
- FIG 3 shows a molecular weight distribution curve by gel permeation chromatography (GPC) of the modified conjugated diene-based polymer of Comparative Example 10 according to an embodiment of the present invention.
- the term 'alkyl group' may refer to a monovalent aliphatic saturated hydrocarbon, and may include linear alkyl groups such as methyl, ethyl, propyl and butyl; branched alkyl groups such as isopropyl, sec-butyl, tert-butyl and neo-pentyl; and cyclic saturated hydrocarbons, or cyclic unsaturated hydrocarbons including one or two or more unsaturated bonds.
- the term 'alkylene group' may mean a divalent aliphatic saturated hydrocarbon such as methylene, ethylene, propylene, and butylene.
- the terms 'derived unit' and 'derived functional group' may refer to a component, structure, or substance itself derived from a certain substance.
- the term 'single bond' may mean a single covalent bond itself that does not include a separate atom or molecular group.
- 'weight average molecular weight (Mw)', 'molecular weight distribution (MWD)' and 'unimodal characteristics' are GPC (Gel permeation chromatohraph) (PL GPC220, Agilent Technolodies), and the weight average molecular weight (Mw) , number average molecular weight (Mn) was measured, a molecular weight distribution curve was obtained, and molecular weight distribution (PDI, MWD, Mw/Mn) was obtained by calculating from each of the measured molecular weights.
- the Mooney stress relaxation rate was measured at 100° C. and a rotor speed of 2 ⁇ 0.02 rpm using a Large Rotor of Alpha Technologies MV2000. Specifically, after leaving the polymer at room temperature (23 ⁇ 5° C.) for more than 30 minutes, 27 ⁇ 3 g was collected, filled in the die cavity, and the Mooney viscosity was measured while applying a torque by operating a platen. In addition, the Mooney stress relaxation rate is expressed as an absolute value by measuring the Mooney viscosity and then measuring the slope value of the Mooney viscosity change appearing when the torque is released.
- the 'Si content' is measured using an inductively coupled plasma emission analyzer (ICP-OES; Optima 7300DV) as an ICP analysis method, and about 0.7 g of the sample is placed in a platinum crucible (Pt) using the inductively coupled plasma emission analyzer.
- crucible add about 1 mL of concentrated sulfuric acid (98% by weight, Electronic grade), and heat at 300° C. for 3 hours, and heat the sample in an electric furnace (Thermo Scientific, Lindberg Blue M) in step 1 After conducting the conversation in the program of to 3,
- step 1 initial temp 0°C, rate (temp/hr) 180°C/hr, temp(holdtime) 180°C (1hr);
- step 2 initial temp 180°C, rate (temp/hr) 85 °C/hr, temp(holdtime) 370°C (2hr);
- step 3 initial temp 370°C, rate (temp/hr) 47°C/hr, temp(holdtime) 510°C (3hr);
- 'N content' may be measured through an NSX analysis method, and the NSX analysis method may be measured using a trace nitrogen quantitative analyzer (NSX-2100H).
- a trace nitrogen quantitative analyzer (NSX-2100H)
- turn on the trace nitrogen quantitative analyzer Auto sampler, Horizontal furnace, PMT & Nitrogen detector
- set the carrier gas flow rate to 250 ml/min for Ar, 350 ml/min for O 2 , and 300 ml/min for the ozonizer
- heater was set to 800°C and then waited for about 3 hours to stabilize the analyzer.
- a calibration curve in the range of 5 ppm, 10 ppm, 50 ppm, 100 ppm and 500 ppm was prepared using Nitrogen standard (AccuStandard S-22750-01-5 ml), and the area corresponding to each concentration was obtained. Afterwards, a straight line was drawn using the ratio of concentration to area. Thereafter, a ceramic boat containing 20 mg of the sample was placed on the auto sampler of the analyzer and measured to obtain an area. The nitrogen atom content was calculated using the area of the obtained sample and the calibration curve.
- the sample used in the NSX analysis method is a modified conjugated diene-based polymer sample obtained by removing the solvent by putting it in hot water heated with steam and stirring, and may be a sample from which residual monomers and residual denaturants are removed.
- oil is added to the above sample, it may be a sample after oil is extracted (removed).
- the present invention provides a modified conjugated diene-based polymer that is manufactured by continuous polymerization, has excellent processability, and has excellent physical properties due to a narrow molecular weight distribution.
- the modified conjugated diene-based polymer according to an embodiment of the present invention has a unimodal molecular weight distribution curve by gel permeation chromatography (GPC), and a molecular weight distribution (PDI; MWD) of 1.0 or more It is less than 1.7, and includes a functional group derived from a denaturant represented by the following Chemical Formula 1 at one end, and a functional group derived from a denaturation initiator at the other end.
- GPC gel permeation chromatography
- PDI molecular weight distribution
- R 1 to R 8 are each independently an alkyl group having 1 to 20 carbon atoms; L 1 and L 2 are each independently an alkylene group having 1 to 20 carbon atoms; n is an integer from 2 to 4.
- the modified conjugated diene-based polymer may include a repeating unit derived from a conjugated diene-based monomer, a functional group derived from a modification initiator, and a functional group derived from a modifier.
- the repeating unit derived from the conjugated diene-based monomer may mean a repeating unit formed during polymerization of the conjugated diene-based monomer, and the functional group derived from the modification initiator and the functional group derived from the modifier are derived from a modification initiator or modifier present at the end of the polymer chain, respectively. It may mean a functional group.
- the modified conjugated diene-based polymer may be a copolymer comprising a repeating unit derived from a conjugated diene-based monomer, a repeating unit derived from an aromatic vinyl monomer, a functional group derived from a modification initiator, and a functional group derived from a modifier.
- the repeating unit derived from the aromatic vinyl monomer may mean a repeating unit formed when the aromatic vinyl monomer is polymerized.
- the conjugated diene-based monomer is 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, piperylene, 3-butyl-1,3-octadiene, isoprene, 2 It may be at least one member selected from the group consisting of -phenyl-1,3-butadiene and 2-halo-1,3-butadiene (halo means a halogen atom).
- the aromatic vinyl monomer is, for example, styrene, ⁇ -methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrene, 1-vinylnaphthalene, 4-cyclohexylstyrene, 4-(p-methylphenyl)styrene, 1 -Vinyl-5-hexylnaphthalene, 3- (2-pyrrolidino ethyl) styrene (3- (2-pyrrolidino ethyl) styrene), 4- (2-pyrrolidino ethyl) styrene (4- (2-pyrrolidino ethyl) )styrene) and 3-(2-pyrrolidino-1-methyl ethyl)- ⁇ -methylstyrene (3-(2-pyrrolidino-1-methyl ethyl)- ⁇ -methylstyrene) may be at least
- the modified conjugated diene-based polymer may be a copolymer further comprising a repeating unit derived from a diene-based monomer having 1 to 10 carbon atoms together with the repeating unit derived from the conjugated diene-based monomer.
- the repeating unit derived from the diene-based monomer may be a repeating unit derived from a diene-based monomer different from the conjugated diene-based monomer, and the diene-based monomer different from the conjugated diene-based monomer may be, for example, 1,2-butadiene. .
- the modified conjugated diene-based polymer is a copolymer further comprising a diene-based monomer
- the modified conjugated diene-based polymer contains more than 0 wt% to 1 wt%, more than 0 wt% to 0.1 wt%, of the repeating unit derived from the diene-based monomer; It may contain more than 0 wt% to 0.01 wt%, or more than 0 wt% to 0.001 wt%, and has the effect of preventing gel formation within this range.
- the copolymer may be a random copolymer, and in this case, an excellent balance between physical properties is obtained.
- the random copolymer may mean that repeating units constituting the copolymer are disorderly arranged.
- the modified conjugated diene-based polymer according to an embodiment of the present invention has a number average molecular weight (Mn) of 1,000 g/mol to 2,000,000 g/mol, 10,000 g/mol to 1,000,000 g/mol, or 100,000 g/mol to 800,000 g It may be /mol, the weight average molecular weight (Mw) may be 1,000 g / mol to 3,000,000 g / mol, 10,000 g / mol to 2,000,000 g / mol, or 100,000 g / mol to 2,000,000 g / mol, the peak average molecular weight (Mp) may be from 1,000 g/mol to 3,000,000 g/mol, from 10,000 g/mol to 2,000,000 g/mol, or from 100,000 g/mol to 2,000,000 g/mol. Within this range, there is an excellent effect of rolling resistance and wet road resistance.
- the modified conjugated diene-based polymer has a molecular weight distribution (PDI; MWD; Mw/Mn) of 1.0 or more and less than 1.7, particularly preferably 1.1 or more, as a ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn). to less than 1.7, excellent in tensile properties and viscoelastic properties within this range, there is an effect of excellent balance between the respective physical properties.
- PDI molecular weight distribution
- MWD Mw/Mn
- Mw weight average molecular weight
- Mn number average molecular weight
- a molecular weight distribution curve by gel permeation chromatography has a unimodal shape, which is a molecular weight distribution shown in a polymer polymerized by continuous polymerization.
- GPC gel permeation chromatography
- the molecular weight distribution curve of the prepared modified conjugated diene-based polymer has a multimodal molecular weight distribution curve of bimodal or higher.
- the growth of each chain can be substantially uniform, and accordingly Since the molecular weight of the prepared polymer chains is constant, the molecular weight distribution may be in a unimodal form with a fairly narrow distribution.
- the initiation of the reaction and the input of the raw materials are continuously performed, and the time at which the starting point at which the reaction starts is generated is different, and accordingly, the polymerization
- the polymerization reaction is completed, polymer chains having various molecular weights are prepared because the initiation varies from the initial stage of the reaction, the middle reaction, the reaction end, and the like. Accordingly, a specific peak does not appear predominantly in the curve representing the distribution of molecular weight, so that the molecular weight distribution curve appears broad as a single peak. Therefore, the diversity of molecular weight distribution can be kept the same, so it is a common case that the unimodal distribution curve is still maintained.
- the denaturation conditions can be adjusted to have a unimodal shape, but in this case, the entire polymer must be uncoupled or the entire polymer must be coupled. and, in other cases, the unimodal molecular weight distribution curve cannot be represented.
- the molecular weight distribution curve of the modified conjugated diene-based polymer shows a unimodal distribution even though it was prepared by the batch polymerization method as described above, when all the polymers are coupled, only polymers having the same molecular weight exist, so that processability This may be poor, and the compounding properties may be poor due to coupling reducing functional groups capable of interacting with fillers such as silica or carbon black, and conversely, if all of the polymer is uncoupled, silica
- the functional group at the end of the polymer which needs to interact with a filler such as carbon black, has a predominant interaction between the functional groups at the end of the polymer rather than the filler, which may interfere with the interaction with the filler, resulting in significantly poor processability.
- the processability and compounding properties of the prepared modified conjugated diene-based polymer may be deteriorated, and in particular, the processability may be remarkably deteriorated.
- the coupling number is the number of functional groups that the polymer present in the modifier can bind after the polymer is modified. It is a dependent number. That is, it represents the ratio of a polymer having no coupling between polymer chains and only terminal modification and a polymer in which a plurality of polymer chains are coupled to one modifier, and may have a range of 1 ⁇ CN ⁇ F, where F is a modifier In , it means the number of functional groups capable of reacting with the end of the active polymer.
- a modified conjugated diene-based polymer having a coupling number of 1 means that all polymer chains are not coupled
- a modified conjugated diene-based polymer having a coupling number of F means that all polymer chains are coupled.
- the modified conjugated diene-based polymer according to an embodiment of the present invention may have a unimodal molecular weight distribution curve but a coupling number greater than 1 and smaller than the functional group number of the used modifier (1 ⁇ C.N ⁇ F).
- the modified conjugated diene-based polymer may have a Si content of 50 ppm or more based on weight, 100 ppm or more, 100 ppm to 10,000 ppm, or 100 ppm to 5,000 ppm, and is modified within this range.
- the Si content may mean the content of Si atoms present in the modified conjugated diene-based polymer.
- the Si atom may be derived from a functional group derived from a modifier.
- the modified conjugated diene-based polymer may have an N content of 50 ppm or more, 100 ppm or more, 100 ppm to 10,000 ppm or 100 ppm to 5,000 ppm, based on the total weight, within this range, the modified conjugated diene-based polymer There is an effect excellent in mechanical properties such as tensile properties and viscoelastic properties of the rubber composition containing the polymer.
- the N content may mean the content of N atoms present in the modified conjugated diene-based polymer, wherein the N atoms may be derived from a functional group derived from a modifier.
- the N atom may include one derived from a functional group derived from a modification initiator.
- the modified conjugated diene-based polymer may have a Mooney stress relaxation rate measured at 100° C. of 0.7 or more, 0.7 or more and 3.0 or less, 0.7 or more and 2.5 or less, or 0.7 or more and 2.0 or less.
- the Mooney stress relaxation rate represents a change in stress that appears in response to the same amount of strain, and may be measured using a Mooney viscometer.
- the Mooney stress relaxation rate can be used as an indicator of the branching structure of the polymer. For example, when comparing polymers having the same Mooney viscosity, the more branches there are, the smaller the Mooney stress relaxation rate, so it can be used as an index of the branching degree.
- the modified conjugated diene-based polymer may have a Mooney viscosity at 100° C. of 30 or more, 40 to 150, or 40 to 140, and has excellent processability and productivity within this range.
- the modified conjugated diene-based polymer may have a vinyl content of 5 wt% or more, 10 wt% or more, or 10 wt% to 60 wt%.
- the vinyl content means the content of the 1,2-added conjugated diene-based monomer, not the 1,4-added, based on 100% by weight of the conjugated diene-based copolymer consisting of a monomer having a vinyl group and an aromatic vinyl-based monomer.
- the modifier according to the present invention may be a modifier for modifying one end of the conjugated diene-based polymer, and specifically, it may be a silica affinity modifier.
- the silica-affinity modifier may mean a modifier containing a silica-affinity functional group in a compound used as a modifier, and the silica-affinity functional group has excellent affinity with a filler, particularly a silica-based filler, and thus a silica-based filler and It may refer to a functional group capable of interaction between functional groups derived from the denaturant.
- the modifier according to an embodiment of the present invention is represented by the following Chemical Formula 1, which can be modified by easily introducing a tertiary amino group that is a filler affinity functional group.
- R 1 to R 8 are each independently an alkyl group having 1 to 20 carbon atoms; L 1 and L 2 are each independently an alkylene group having 1 to 20 carbon atoms; n is an integer from 2 to 4.
- R 1 to R 4 may be each independently a substituted or unsubstituted C 1 to C 20 alkyl group, and when R 1 to R 4 are substituted, each independently of 1 to 10 C atoms
- a canoyloxy group (alkanoyl, R a COO-, wherein R a is an alkyl group having 1 to 9 carbon atoms), an aralkyloxy group having 7 to 13 carbon atoms, an arylalkyl group having 7 to 13 carbon atoms, and alkylaryl having 7 to 13 carbon atoms It may be substituted with one or more substituents selected from the
- R 1 to R 4 may be a substituted or unsubstituted C 1 to C 10 alkyl group, and more specifically, R 1 to R 4 are each independently a substituted or unsubstituted, C 1 to C 6 alkyl group. It may be an alkyl group.
- R 5 to R 8 are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, specifically a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, more specifically, a substituted or unsubstituted alkyl group It may be a cyclic alkyl group having 1 to 6 carbon atoms, and when substituted, may be substituted with the same substituents as described above for R 1 to R 4 .
- R 5 to R 8 are not an alkyl group but a hydrolyzable group
- the bond between NR 5 R 6 and NR 7 R 8 may be hydrolyzed to NH in the presence of moisture, thereby adversely affecting the processability of the polymer.
- R 1 to R 4 may be a methyl group or an ethyl group
- R 5 to R 8 may be an alkyl group having 1 to 10 carbon atoms.
- the amino group included in Formula 1, ie, -NR 5 R 6 and -NR 7 R 8 is preferably a tertiary amino group.
- the tertiary amino group allows the compound of the present invention to have better processability when used as a modifier.
- L 1 and L 2 may each independently be a substituted or unsubstituted C 1 to C 20 alkylene group. More specifically, L 1 and L 2 may each independently be an alkylene group having 1 to 10 carbon atoms, and more specifically, may be an alkylene group having 1 to 6 carbon atoms, such as a methylene group, an ethylene group, or a propylene group.
- L 1 and L 2 are each independently more preferably an alkylene group having 1 to 3 carbon atoms, such as a methylene group, an ethylene group, or a propylene group. And, more specifically, it may be a propylene group.
- L 1 and L 2 may be substituted with the same substituents as described above for R 1 to R 4 .
- the compound represented by Formula 1 may be one or more selected from the group consisting of compounds represented by Formula 1a to Formula 1e:
- Me is a methyl group
- Et is an ethyl group
- the alkoxysilane structure is bonded to the activated terminal of the conjugated diene-based polymer, while the Si-O-Si structure and three or more amino groups bonded to the terminal are fillers such as silica
- the binding degree of the activated terminal of the conjugated diene-based polymer is uniform, when the change in molecular weight distribution is observed before and after coupling, the molecular weight distribution does not increase and is constant even after coupling.
- the dispersibility of the filler can be improved by preventing aggregation of the filler in the rubber composition, thereby improving the processability of the rubber composition. characteristics can be improved in a balanced way.
- the modifier represented by Formula 1 may be prepared through a condensation reaction represented by Scheme 1 below.
- R 1 to R 8 , L 1 to L 2 , and n are as defined in Formula 1 above, and R′ and R′′ are any substituents that do not affect the condensation reaction.
- R′ and R′′ may each independently be the same as any one of R 1 to R 4 .
- the reaction is carried out under acid conditions, and the acid may be used without limitation as long as it is generally used in the condensation reaction.
- a person skilled in the art can select an optimal acid according to various process parameters such as the type of reactor in which the reaction is carried out, starting materials, and reaction temperature.
- the modification initiator according to an embodiment of the present invention is a compound represented by the following formula (2a); a reaction product of a compound selected from compounds represented by the following Chemical Formulas 2b to 2e and an organometallic compound; and a compound represented by the following Chemical Formula 2f; may be at least one compound selected from the group consisting of.
- the compound represented by the following Chemical Formula 2a may be applied as a modification initiator without reaction with an organometallic compound, and may be a compound represented as follows.
- R a1 to R a7 are each independently a hydrogen atom; 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; an arylalkyl group having 7 to 20 carbon atoms; an alkylaryl group having 7 to 20 carbon atoms; or a heteroalkyl group having 1 to 20 carbon atoms including a hetero atom, and m is an integer of 0 to 3.
- R a1 to R a7 are each independently a hydrogen atom; 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; an arylalkyl group having 7 to 20 carbon atoms; an alkylaryl group having 7 to 20 carbon atoms; an alkoxy group having 1 to 20 carbon atoms; an alkoxyalkyl group having 2 to 20 carbon atoms; an aryloxy group having 6 to 20 carbon atoms; Or it may be an aryloxyalkyl group having 7 to 20 carbon atoms.
- R a1 is an alkyl group having 1 to 10 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms
- R a2 to R a7 are each independently a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, Preferably, it may be a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
- modification initiator represented by Formula 2a may be a compound represented by Formula 2aa below.
- m is an integer of 0 to 3.
- the compound represented by the following Chemical Formula 2b may be applied in the form of a compound generated through reaction with an organometallic compound, and may be a compound represented as follows.
- X b1 is N or O, when X b1 is O, R b7 or R b8 is not present, and R b1 to R b5 are each independently a hydrogen atom; 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; an arylalkyl group having 7 to 20 carbon atoms; or an alkylaryl group having 7 to 20 carbon atoms; Two substituents adjacent to each other may be linked to form one aliphatic or aromatic ring, and R b6 is a single bond; or an alkylene group having 1 to 12 carbon atoms, and R b7 and R b8 are each independently an alkyl group having 1 to 14 carbon atoms or an aryl group having 6 to 14 carbon atoms.
- X b1 is N or O, when X b1 is O, R b7 or R b8 is not present, and R b1 to R b5 are each independently a hydrogen atom. or an alkyl group having 1 to 10 carbon atoms, and R b6 is a single bond; or an alkylene group having 1 to 6 carbon atoms, and R b7 and R b8 are each independently an alkyl group having 1 to 10 carbon atoms.
- the compound represented by Formula 2b may be a compound represented by Formula 2ba to Formula 2bd.
- the compound represented by the following Chemical Formula 2c may be applied in the form of a compound generated through reaction with an organometallic compound, and may be a compound represented as follows.
- R c1 to R c3 are each independently a hydrogen atom; an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; A heteroalkyl group having 1 to 30 carbon atoms, a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl group having 2 to 30 carbon atoms; a cycloalkyl group having 5 to 30 carbon atoms; an aryl group having 6 to 30 carbon atoms; Or it may be a heterocyclic group having 3 to 30 carbon atoms.
- R c4 is a single bond; an alkylene group having 1 to 20 carbon atoms that is unsubstituted or substituted with a substituent; a cycloalkylene group having 5 to 20 carbon atoms that is unsubstituted or substituted with a substituent; Or an arylene group having 6 to 20 carbon atoms substituted or unsubstituted with a substituent, wherein the substituent may be an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms.
- R c5 is an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a heteroalkyl group having 1 to 30 carbon atoms; a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl group having 2 to 30 carbon atoms; a cycloalkyl group having 5 to 30 carbon atoms; an aryl group having 6 to 30 carbon atoms; a heterocyclic group having 3 to 30 carbon atoms; or a functional group represented by Formula 2c-1 or Formula 2c-2, k is an integer of 1 to 5 , at least one of R c5 is a functional group represented by Formula 2c-1 or Formula 2c-2, and k is In the case of an integer of 2 to 5, a plurality of R c5 may be the same as or different from each other.
- R c6 is an alkylene group having 1 to 20 carbon atoms which is unsubstituted or substituted with a substituent; a cycloalkylene group having 5 to 20 carbon atoms that is unsubstituted or substituted with a substituent; Or an arylene group having 6 to 20 carbon atoms substituted or unsubstituted with a substituent, wherein the substituent is an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms, R c7 and R c8 is each independently an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an alkylene group having 1 to 20 carbon atoms unsubstituted or substituted with an aryl group having 6 to 20 carbon atoms, R c9 is a hydrogen atom; an alkyl group
- R c10 is an alkylene group having 1 to 20 carbon atoms that is unsubstituted or substituted with a substituent; a cycloalkylene group having 5 to 20 carbon atoms that is unsubstituted or substituted with a substituent; Or an arylene group having 6 to 20 carbon atoms substituted or unsubstituted with a substituent, wherein the substituent is an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms, R c11 and R c12 are each independently an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a heteroalkyl group having 1 to 30 carbon atoms; a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl
- R c1 to R c3 are each independently a hydrogen atom; an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 2 to 10 carbon atoms; or an alkynyl group having 2 to 10 carbon atoms, and R c4 is a single bond; or an unsubstituted alkylene group having 1 to 10 carbon atoms, and R c5 is an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 2 to 10 carbon atoms; an alkynyl group having 2 to 10 carbon atoms; or a functional group represented by Formula 2c-1 or Formula 2c-2, in Formula 2c-1, R c6 is an unsubstituted alkylene group having 1 to 10 carbon atoms, and R c7 and R c8 are each independently unsubstituted is an alkylene group having 1 to 10 carbon atoms, and R c9 is an alkyl group having 1 to 10 carbon atoms, and R c9
- the compound represented by Chemical Formula 2c may be a compound represented by the following Chemical Formulas 2ca to 2cc.
- the compound represented by the following Chemical Formula 2d may be applied in the form of a compound generated through reaction with an organometallic compound, and may be a compound represented as follows.
- R d1 to R d5 are each independently a hydrogen atom; an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; A heteroalkyl group having 1 to 30 carbon atoms, a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl group having 2 to 30 carbon atoms; a cycloalkyl group having 5 to 30 carbon atoms; an aryl group having 6 to 30 carbon atoms; or a heterocyclic group having 3 to 30 carbon atoms, and R d6 is an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; A heteroalkyl group having 1 to 30 carbon atoms, a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkyn
- R d7 and R d8 are each independently an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an alkyl group having 1 to 20 carbon atoms which is unsubstituted or substituted with an aryl group having 6 to 20 carbon atoms.
- R d9 is a hydrogen atom; an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a heteroalkyl group having 1 to 30 carbon atoms; a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl group having 2 to 30 carbon atoms; a cycloalkyl group having 5 to 30 carbon atoms; an aryl group having 6 to 30 carbon atoms; It is a heterocyclic group having 3 to 30 carbon atoms, X d2 is N, O or S atom, and when X d2 is O or S, R d9 may not be present.
- R d11 and R d12 are each independently an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a heteroalkyl group having 1 to 30 carbon atoms; a heteroalkenyl group having 2 to 30 carbon atoms; a heteroalkynyl group having 2 to 30 carbon atoms; a cycloalkyl group having 5 to 30 carbon atoms; an aryl group having 6 to 30 carbon atoms; It may be a heterocyclic group having 3 to 30 carbon atoms.
- R d1 to R d5 are each independently a hydrogen atom; an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 2 to 10 carbon atoms; or an alkynyl group having 2 to 10 carbon atoms
- R d6 is an unsubstituted alkylene group having 1 to 10 carbon atoms
- X d1 is a functional group represented by Formula 2d-1 or Formula 2d-2
- R d7 and R d8 are each independently an unsubstituted C 1 to C 10 alkylene group
- R d9 is an unsubstituted C 1 to C 10 alkyl group
- X d2 is N, and in Formula 2d-2, R d11 and R
- the compound represented by Formula 2d may be a compound represented by Formula 2da or Formula 2db.
- organometallic compound is an organolithium compound, an organosodium compound, an organopotassium compound, an organorubidium compound, and an organocesium. It may be at least one selected from the group consisting of compounds.
- the organometallic compound is methyllithium, ethyllithium, isopropyllithium, n-butyllithium, sec-butyllithium, tert-butyllithium, n-decyllithium, tert-octyllithium, phenyllithium, 1-naphthyl It may be at least one selected from lithium, n-eicolithium, 4-butylphenyllithium, 4-tolylithium, cyclohexyllithium, 3,5-di-n-heptylcyclohexyllithium, and 4-cyclopentyllithium.
- the compound represented by the following Chemical Formula 2e may be applied in the form of a compound generated through reaction with an organometallic compound, and may be a compound represented as follows.
- R e1 is an alkenyl group having 2 to 10 carbon atoms.
- the compound represented by Formula 2e may be a compound represented by Formula 2ea below, that is, 1-vinyl imidazole (1-vinyl-1H-imidazole).
- the compound represented by the following Chemical Formula 2f may be applied as a modification initiator without reaction with an organometallic compound, and may be a compound represented as follows.
- R f1, R f2 and R f5 are each independently 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; an arylalkyl group having 7 to 20 carbon atoms; or an alkylaryl group having 7 to 20 carbon atoms
- R f3 and R f4 are each independently an alkylene group having 1 to 20 carbon atoms or an arylene group having 6 to 20 carbon atoms
- p is an integer of 1 to 5.
- R f1, R f2 and R f5 are each independently an alkyl group having 1 to 10 carbon atoms; a cycloalkyl group having 3 to 10 carbon atoms; an aryl group having 6 to 10 carbon atoms; an arylalkyl group having 7 to 10 carbon atoms; or an alkylaryl group having 7 to 10 carbon atoms
- R f3 and R f4 are each independently an alkylene group having 1 to 10 carbon atoms or an arylene group having 6 to 10 carbon atoms
- n may be an integer of 1 to 3.
- R f1, R f2 and R f5 are each independently an alkyl group having 1 to 6 carbon atoms
- R f3 and R f4 are each independently an alkylene group having 1 to 6 carbon atoms
- n is 1 to It may be an integer of 3.
- modification initiator represented by Formula 2f may be a compound represented by Formula 2fa below.
- the polymer has a specific structure, and may have a unique molecular weight distribution and shape.
- the structure of such a polymer can be expressed by physical properties such as Mooney stress relaxation rate and number of couplings, and the molecular weight distribution and its shape can be expressed in the form of PDI value, molecular weight distribution curve, and number of couplings, and modifiers and denaturants Both terminal modification by the initiator may affect the structure and molecular weight distribution and its shape.
- the parameters expressing the structure of such a polymer and characteristics related to molecular weight distribution can be satisfied according to the manufacturing method described later, and it is preferable to satisfy the above characteristics to be prepared through such a manufacturing method, but When all of them are satisfied, the effect to be realized in the present invention can be achieved.
- the present invention provides a method for producing the modified conjugated diene-based polymer.
- the method for producing the modified conjugated diene-based polymer comprises polymerizing a conjugated diene-based monomer or a conjugated diene-based monomer and an aromatic vinyl monomer in a hydrocarbon solvent in the presence of a modification initiator to introduce a functional group derived from the modification initiator.
- the polymerization conversion rate in the first reactor among the polymerization reactors may be 50% or less.
- the hydrocarbon solvent is not particularly limited, but may be, for example, at least one selected from the group consisting of n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene and xylene.
- conjugated diene-based monomer and the aromatic vinyl monomer are as defined above.
- the denaturation initiator may be used in an amount of 0.01 mmol to 10 mmol, 0.05 mmol to 5 mmol, 0.1 mmol to 2 mmol, 0.1 mmol to 1 mmol, or 0.15 to 0.8 mmol based on 100 g of the total monomer. Can be used.
- the polymerization in step (S1) may be, for example, anionic polymerization, and as a specific example, living anionic polymerization having an anionic active site at the polymerization end by an anion-based growth polymerization reaction.
- the polymerization in step (S1) may be an elevated temperature polymerization, isothermal polymerization, or constant temperature polymerization (adiabatic polymerization), and the constant temperature polymerization includes a step of polymerizing by its own heat of reaction without optionally applying heat after adding a denaturation initiator may refer to a polymerization method, and the temperature-rising polymerization may refer to a polymerization method in which the temperature is increased by arbitrarily applying heat after the addition of the modification initiator, and the isothermal polymerization is heat by adding heat after the modification initiator is added It may refer to a polymerization method in which the temperature of the polymer is maintained constant by increasing the temperature or taking heat away.
- the polymerization in step (S1) may be carried out by further including a diene-based compound having 1 to 10 carbon atoms in addition to the conjugated diene-based monomer, and in this case, it is applied to the reactor wall during long-term operation. It has the effect of preventing the formation of a gel.
- the diene-based compound may be, for example, 1,2-butadiene.
- step (S1) may be carried out in a temperature range of, for example, less than 80 °C, -20 °C to 80 °C, 0 °C to 80 °C, 0 °C to 70 °C or 10 °C to 70 °C, within this range.
- a temperature range of, for example, less than 80 °C, -20 °C to 80 °C, 0 °C to 80 °C, 0 °C to 70 °C or 10 °C to 70 °C, within this range
- the active polymer prepared by the step (S1) may refer to a polymer in which a polymer anion and an organometallic cation are bound.
- the method for preparing the modified conjugated diene-based polymer may be carried out by a continuous polymerization method in a plurality of reactors including two or more polymerization reactors and a modification reactor.
- step (S1) may be continuously performed in two or more polymerization reactors including the first reactor, and the number of polymerization reactors may be flexibly determined according to reaction conditions and environment.
- the continuous polymerization method may refer to a reaction process in which reactants are continuously supplied to a reactor and the generated reaction products are continuously discharged. In the case of the continuous polymerization method, there is an effect of excellent productivity and processability, and excellent uniformity of the produced polymer.
- the polymerization conversion in the first reactor may be 50% or less, 10% to 50%, or 20% to 50%, After the polymerization reactor is started within this range, it is possible to induce a polymer having a linear structure during polymerization by suppressing side reactions that occur while the polymer is formed, and thus it is possible to narrowly control the molecular weight distribution of the polymer. The improvement is excellent.
- the polymerization conversion rate may be adjusted according to the reaction temperature, the residence time of the reactor, and the like.
- the polymerization conversion rate may be determined, for example, by measuring the concentration of solids in a polymer solution containing the polymer during polymerization of the polymer.
- a cylindrical vessel is mounted at the outlet of each polymerization reactor to secure the polymer solution to be constant.
- a positive polymer solution is filled in a cylindrical container, the cylindrical container is separated from the reactor, the weight (A) of the cylinder filled with the polymer solution is measured, and the polymer solution filled in the cylindrical container is placed in an aluminum container; For example, transfer to an aluminum dish and measure the weight (B) of a cylindrical container from which the polymer solution has been removed, the aluminum container containing the polymer solution is dried in an oven at 140° C. for 30 minutes, and the weight (C) of the dried polymer is measured After the measurement, it may be calculated according to Equation 1 below.
- the polymer polymerized in the first reactor may be sequentially transferred to the polymerization reactor before the modification reactor, and polymerization may proceed until the polymerization conversion ratio is 95% or more.
- the second reactor or the polymerization conversion rate for each reactor from the second reactor to the polymerization reactor before the modification reactor may be appropriately adjusted for each reactor to control the molecular weight distribution.
- the residence time of the polymer in the first reactor may be 1 minute to 40 minutes, 1 minute to 30 minutes, or 5 minutes to 30 minutes, and within this range, the polymerization It is easy to control the conversion rate, and thus it is possible to narrowly control the molecular weight distribution of the polymer, and thus, there is an excellent effect of improving physical properties.
- the term 'polymer' means that step (S1) or step (S2) is completed, prior to obtaining an active polymer or a modified conjugated diene-based polymer, during step (S1), polymerization is carried out in each reactor It may mean an intermediate in the form of a polymer being used, and may mean a polymer having a polymerization conversion rate of less than 95% in which polymerization is being carried out in the reactor.
- the molecular weight distribution (PDI, polydispersed index; MWD, molecular weight distribution; Mw/Mn) of the active polymer prepared in step (S1) is less than 1.5, 1.0 or more to less than 1.5, or 1.1 It may be greater than or equal to 1.5, and within this range, the molecular weight distribution of the modified conjugated diene-based polymer produced through a modification reaction or coupling with a modifier is narrow, and there is an excellent effect of improving physical properties.
- the polymerization in step (S1) may be carried out including a polar additive, and the polar additive is added in a proportion of 0.001 g to 50 g, 0.001 g to 10 g, or 0.005 g to 0.1 g based on 100 g of the total monomer. can do.
- the polar additive may be added in a ratio of 0.001 g to 10 g, 0.005 g to 5 g, 0.005 g to 4 g based on 1 mmol of the modification initiator in total.
- the polar additive is, for example, tetrahydrofuran, 2,2-di(2-tetrahydrofuryl)propane, diethyl ether, cyclopentyl ether, dipropyl ether, ethylene methyl ether, ethylene dimethyl ether, diethyl glycol, dimethyl ether , tertiary butoxyethoxyethane, bis (3-dimethylaminoethyl) ether, (dimethylaminoethyl) ethyl ether, trimethylamine, triethylamine, tripropylamine, N,N,N',N'-tetramethyl It may be at least one selected from the group consisting of ethylenediamine, sodium mentholate, and 2-ethyl tetrahydrofurfuryl ether, preferably 2,2-di(2-tetrahydro furyl) propane, triethylamine, tetramethylethylenediamine, sodium mentholate, or
- the reaction or coupling of step (S2) may be carried out in a denaturation reactor, and in this case, the denaturant may be used in an amount of 0.01 mmol to 10 mmol based on 100 g of the total monomer. have.
- the modifier may be used in a molar ratio of 1:0.1 to 10, 1:0.1 to 5, or 1:0.1 to 1:3 based on 1 mole of the modification initiator in step (S1).
- the denaturant may be introduced into the denaturation reactor, and the step (S2) may be performed in the denaturation reactor.
- the modifier may be added to a transport unit for transporting the active polymer prepared in step (S1) to a modification reactor for performing step (S2), and the active polymer and modifier are mixed in the transport unit. The reaction or coupling may proceed by this.
- the method for producing the modified conjugated diene-based polymer according to an embodiment of the present invention is a method capable of satisfying the characteristics of the above-described modified conjugated diene-based polymer, and the effect to be achieved in the present invention as described above has the above characteristics. can be achieved, but at least in the above production method, the polymerization conversion rate when transferring from the first reactor to the second reactor under the continuous process needs to be satisfied, and in the case of other polymerization conditions, by controlling variously, The physical properties of the modified conjugated diene-based polymer according to the present invention can be implemented.
- the present invention provides a rubber composition comprising the modified conjugated diene-based polymer.
- the rubber composition may include the modified conjugated diene-based polymer in an amount of 10 wt% or more, 10 wt% to 100 wt%, or 20 wt% to 90 wt%, within this range, tensile strength, abrasion resistance, etc. It has excellent mechanical properties and an excellent balance between the physical properties.
- the rubber composition may further include other rubber components as needed in addition to the modified conjugated diene-based polymer, wherein the rubber component may be included in an amount of 90% by weight or less based on the total weight of the rubber composition.
- the other rubber component may be included in an amount of 1 to 900 parts by weight based on 100 parts by weight of the modified conjugated diene-based polymer.
- the rubber component may be, for example, natural rubber or synthetic rubber, and specific examples thereof include natural rubber (NR) including cis-1,4-polyisoprene; Modified natural rubbers such as epoxidized natural rubber (ENR), deproteinized natural rubber (DPNR), and hydrogenated natural rubber, which are modified or refined of the general natural rubber; Styrene-butadiene copolymer (SBR), polybutadiene (BR), polyisoprene (IR), butyl rubber (IIR), ethylene-propylene copolymer, polyisobutylene-co-isoprene, neoprene, poly(ethylene-co-) propylene), poly(styrene-co-butadiene), poly(styrene-co-isoprene), poly(styrene-co-isoprene-co-butadiene), poly(isoprene-co-butadiene), poly(ethylene-co-propylene) -co
- the rubber composition may include, for example, 0.1 parts by weight to 200 parts by weight, or 10 parts by weight to 120 parts by weight of a filler based on 100 parts by weight of the modified conjugated diene-based polymer of the present invention.
- the filler may be, for example, a silica-based filler, and specific examples thereof include wet silica (hydrous silicic acid), dry silica (silicic anhydride), calcium silicate, aluminum silicate or colloidal silica, and preferably, the effect of improving the breaking properties and wet Wet silica may be the most excellent in compatibility with wet grip.
- the rubber composition may further include a carbon-based filler if necessary.
- silane coupling agent for improving reinforcing properties and low heat generation may be used together, and as a specific example, the silane coupling agent is bis(3-triethoxysilylpropyl)tetrasulfide , bis(3-triethoxysilylpropyl)trisulfide, bis(3-triethoxysilylpropyl)disulfide, bis(2-triethoxysilylethyl)tetrasulfide, bis(3-trimethoxysilyl) propyl) tetrasulfide, bis(2-trimethoxysilylethyl)tetrasulfide, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 2-mercaptoethyltrimethoxysilane, 2-Mercaptoethyltriethoxysilane, 3-trimethoxys
- it may be bis(3-triethoxysilylpropyl)polysulfide or 3-trimethoxysilylpropylbenzothiazyltetrasulfide.
- a modified conjugated diene-based polymer in which a functional group with high affinity for silica is introduced is used as a rubber component, so the compounding amount of the silane coupling agent is conventional. may be reduced than the case, and accordingly, the silane coupling agent may be used in an amount of 1 part by weight to 20 parts by weight, or 5 parts by weight to 15 parts by weight based on 100 parts by weight of silica, within this range, the effect as a coupling agent is not significant. It has the effect of preventing the gelation of the rubber component while being sufficiently exhibited.
- the rubber composition according to an embodiment of the present invention may be crosslinkable with sulfur, and may further include a vulcanizing agent.
- the vulcanizing agent may be specifically sulfur powder, and may be included in an amount of 0.1 parts by weight to 10 parts by weight based on 100 parts by weight of the rubber component, and within this range, the vulcanized rubber composition has a low fuel efficiency while securing the required elastic modulus and strength. It has an excellent effect.
- the rubber composition according to an embodiment of the present invention includes, in addition to the above components, various additives commonly used in the rubber industry, specifically, a vulcanization accelerator, a process oil, an antioxidant, a plasticizer, an anti-aging agent, an anti-scorch agent, a zinc white), stearic acid, a thermosetting resin, or a thermoplastic resin may be further included.
- various additives commonly used in the rubber industry specifically, a vulcanization accelerator, a process oil, an antioxidant, a plasticizer, an anti-aging agent, an anti-scorch agent, a zinc white), stearic acid, a thermosetting resin, or a thermoplastic resin may be further included.
- the vulcanization accelerator is, for example, a thiazole-based compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyldisulfide), CZ (N-cyclohexyl-2-benzothiazylsulfenamide), or DPG
- a thiazole-based compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyldisulfide), CZ (N-cyclohexyl-2-benzothiazylsulfenamide), or DPG
- a guanidine-based compound such as (diphenylguanidine) may be used, and may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the rubber component.
- the process oil acts as a softener in the rubber composition, for example, may be a paraffinic, naphthenic, or aromatic compound, and when considering the tensile strength and abrasion resistance, the aromatic process oil price, hysteresis loss and low temperature characteristics Naphthenic or paraffinic process oils may be used.
- the process oil may be included in an amount of 100 parts by weight or less based on 100 parts by weight of the rubber component, for example, and has an effect of preventing deterioration of the tensile strength and low heat generation (low fuel efficiency) of the vulcanized rubber within this range.
- the antioxidant is, for example, 2,6-di-t-butylparacresol, dibutylhydroxytoluenyl, 2,6-bis((dodecylthio)methyl)-4-nonylphenol (2,6-bis(2,6-bis( (dodecylthio)methyl)-4-nonylphenol) or 2-methyl-4,6-bis((octylthio)methyl)phenol (2-methyl-4,6-bis((octylthio)methyl)phenol), It may be used in an amount of 0.1 to 6 parts by weight based on 100 parts by weight of the rubber component.
- the antioxidant is, for example, N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 6-ethoxy-2 ,2,4-trimethyl-1,2-dihydroquinoline, or a high-temperature condensate of diphenylamine and acetone, etc., may be used in an amount of 0.1 to 6 parts by weight based on 100 parts by weight of the rubber component.
- the rubber composition according to an embodiment of the present invention can be obtained by kneading using a kneader such as a Banbury mixer, a roll, an internal mixer, etc. according to the compounding prescription, and has low heat generation and abrasion resistance by a vulcanization process after molding processing. This excellent rubber composition can be obtained.
- a kneader such as a Banbury mixer, a roll, an internal mixer, etc.
- the rubber composition may be used for each member of the tire, such as a tire tread, under tread, side wall, carcass coated rubber, belt coated rubber, bead filler, chaff, or bead coated rubber, vibration proof rubber, belt conveyor, hose, etc. It may be useful in the manufacture of various industrial rubber products of
- the present invention provides a tire manufactured using the rubber composition.
- the tire may include a tire or a tire tread.
- a first reaction solution was prepared by putting 516 g of cyclohexane, 217.6 g of a compound represented by the following Chemical Formula 2bd, and 108 g of tetramethylethylenediamine into the first pressure vessel.
- 258 g of 2.5 M n-butyllithium and 472 g of cyclohexane were put into a second pressure vessel to prepare a second reaction solution.
- the molar ratio of the compound represented by Formula 2bd, n-butyllithium, and tetramethylethylenediamine was 1:1:1.
- each pressure vessel While the pressure of each pressure vessel was maintained at 4 bar, the first reaction solution was injected into the first continuous channel in the continuous reactor using a mass flow meter at a rate of 1.0 g/min, and the second reaction solution was introduced into the second continuous channel. The reaction solution was each injected at an injection rate of 1.0 g/min. At this time, the temperature of the continuous reactor was maintained at 25° C., the internal pressure was maintained at 2 bar using a backpressure regulator, and the residence time in the reactor was adjusted to be within 10 minutes to prepare a denaturation initiator. . After completion of the reaction, it was confirmed that the compound represented by Formula 2bd was converted to 99% or more by analysis by gas chromatography, thereby confirming that the denaturation initiator was prepared.
- a first reaction solution was prepared by putting 6,922 g of cyclohexane, 120 g of a compound represented by the following Chemical Formula 2ca, and 60 g of tetramethylethylenediamine in the first pressure vessel.
- 180 g of 2.0 M n-butyllithium and 6,926 g of cyclohexane were put into a second pressure vessel to prepare a second reaction solution.
- the molar ratio of the compound represented by Formula 2ca, n-butyllithium, and tetramethylethylenediamine was 1:1:1.
- each pressure vessel While the pressure of each pressure vessel was maintained at 7 bar, the first reaction solution was fed into the first continuous channel in the continuous reactor using a mass flow meter at a rate of 1.0 g/min, and the second reaction solution was introduced into the second continuous channel. The reaction solution was each injected at an injection rate of 1.0 g/min. At this time, the temperature of the continuous reactor was maintained at -10°C, the internal pressure was maintained at 3 bar using a backpressure regulator, and the residence time in the reactor was adjusted to be within 10 minutes to prepare a denaturation initiator did. After completion of the reaction, it was confirmed that the compound represented by Formula 2ca was converted to 99% or more by gas chromatography analysis, thereby confirming that the denaturation initiator was prepared.
- a first reaction solution was prepared by putting 516 g of cyclohexane, 100 g of a compound represented by the following Chemical Formula 2db and 105 g of tetramethylethylenediamine into the first pressure vessel.
- 248 g of 2.5 M n-butyllithium and 472 g of cyclohexane were added to a second pressure vessel to prepare a second reaction solution.
- the molar ratio of the compound represented by Formula 2db, n-butyllithium, and tetramethylethylenediamine was 1:1:1.
- each pressure vessel While the pressure of each pressure vessel was maintained at 4 bar, the first reaction solution was injected into the first continuous channel in the continuous reactor using a mass flow meter at a rate of 1.0 g/min, and the second reaction solution was introduced into the second continuous channel. The reaction solution was each injected at an injection rate of 1.0 g/min. At this time, the temperature of the continuous reactor was maintained at 0° C., the internal pressure was maintained at 2 bar using a backpressure regulator, and the residence time in the reactor was adjusted to be within 10 minutes to prepare a denaturation initiator. . After completion of the reaction, it was confirmed that the compound represented by Formula 2db was converted to 99% or more by gas chromatography analysis, thereby confirming that the denaturation initiator was prepared.
- a first reaction solution was prepared by putting 6,922 g of cyclohexane, 52.2 g of a compound represented by the following Chemical Formula 2ea, and 60 g of tetramethylethylenediamine in the first pressure vessel.
- 180 g of 2.0 M n-butyllithium and 6,926 g of cyclohexane were put into a second pressure vessel to prepare a second reaction solution.
- the molar ratio of the compound represented by Formula 2ea, n-butyllithium, and tetramethylethylenediamine was 1:1:1.
- each pressure vessel While the pressure of each pressure vessel was maintained at 7 bar, the first reaction solution was fed into the first continuous channel in the continuous reactor using a mass flow meter at a rate of 1.0 g/min, and the second reaction solution was introduced into the second continuous channel. The reaction solution was each injected at an injection rate of 1.0 g/min. At this time, the temperature of the continuous reactor was maintained at -10°C, the internal pressure was maintained at 3 bar using a backpressure regulator, and the residence time in the reactor was adjusted to be within 10 minutes to prepare a denaturation initiator did. After completion of the reaction, it was confirmed that the compound represented by Formula 2bd was converted to 99% or more by analysis by gas chromatography, thereby confirming that the denaturation initiator was prepared.
- a 1,3-butadiene solution in which 60 wt% of 1,3-butadiene was dissolved in n-hexane was injected into the second reactor at a rate of 2.95 kg/h.
- the temperature of the second reactor was maintained at 65° C., and when the polymerization conversion rate reached 95% or more, the polymer was transferred from the second reactor to the third reactor through a transfer pipe.
- the temperature of the third reactor was maintained at 70°C.
- Example 1 the same procedure as in Example 1 was carried out except that a solution in which 10 wt% of the modification initiator prepared in Preparation Example 2 was dissolved in n-hexane as the modification initiator was injected at 165 g/h. Thus, both ends of the modified conjugated diene-based polymer was prepared.
- Example 1 in the same manner as in Example 1, except that a solution in which 10 wt% of the modification initiator prepared in Preparation Example 3 was dissolved in n-hexane as the modification initiator was injected at 185 g/h, Both terminal-modified conjugated diene-based polymers were prepared.
- a 1,3-butadiene solution in which 60 wt% of 1,3-butadiene was dissolved in n-hexane was injected into the second reactor at a rate of 2.62 kg/h.
- the temperature of the second reactor was maintained at 65° C., and when the polymerization conversion rate reached 95% or more, the polymer was transferred from the second reactor to the third reactor through a transfer pipe.
- the temperature of the third reactor was maintained at 70°C.
- Example 7 in the same manner as in Example 7, except that a solution in which the modification initiator prepared in Preparation Example 5 was dissolved at 10 wt% in n-hexane as the modification initiator was injected at 121 g/h , to prepare a conjugated diene-based polymer modified at both ends.
- Example 1 a solution in which 10 wt% of the compound represented by Formula 2fa prepared in Preparation Example 6 was dissolved in n-hexane as a modification initiator was injected at 265.0 g/h, and when the polymerization conversion rate was 41% , to prepare a conjugated diene-based polymer modified at both ends in the same manner as in Example 1, except that the polymer was transferred from the first reactor to the second reactor through a transfer pipe.
- Example 4 instead of the modification initiator, a solution of n-butyllithium in which 10% by weight of n-butyllithium was dissolved in n-hexane was injected at a rate of 75.0 g/h, and the temperature of the first reactor was 55° C. terminal-modified conjugated diene-based polymer in the same manner as in Example 4, except that the polymer was transferred from the first reactor to the second reactor through a transfer pipe when the polymerization conversion rate reached 45%. was prepared.
- Example 1 the reaction temperature is maintained at 75° C. in the first reactor, 80° C. in the second reactor, and 80° C. in the third reactor, and when the polymerization conversion rate in the first reactor is 68%, through the transfer pipe , A conjugated diene-based polymer modified at both ends was prepared in the same manner as in Example 1, except that the polymerization was carried out by transferring the polymer from the first reactor to the second reactor.
- Example 1 when the polymerization conversion rate reached 42%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe, and the reaction was carried out without adding a modifier to the third reactor. In the same manner as in Example 1, a terminal-modified conjugated diene-based polymer was prepared.
- Example 1 instead of the compound of Preparation Example 1 as a modification initiator, a solution of n-butyllithium in which 10 wt% of n-butyllithium was dissolved in n-hexane was continuously added to the first reactor at a rate of 75.0 g/h.
- the terminal-modified conjugated diene-based polymer was prepared in the same manner as in Example 1 except that the polymer was transferred from the first reactor to the second reactor through a transfer pipe when the polymerization conversion rate reached 41%. prepared.
- Example 9 instead of the compound prepared in Preparation Example 3 as a modification initiator, a solution of n-butyllithium in which butyllithium was dissolved at 10 wt% in n-hexane was continuously added to the first reactor at a rate of 75.0 g/h. was added, and the temperature of the first reactor was maintained at 55° C., and when the polymerization conversion reached 49%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe, and the denaturant was added to n-hexane.
- Me is a methyl group.
- Example 6 when the polymerization conversion rate reached 41%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe, and the compound represented by the following formula ii in n-hexane as a modifier was 20 wt%
- the compound represented by the following formula ii in n-hexane as a modifier was 20 wt%
- TMS is a trimethylsilyl group
- Me is a methyl group
- Example 5 when the polymerization conversion rate reached 41%, the polymer was transferred from the first reactor to the second reactor through a transfer pipe, and the modification initiator prepared in Preparation Example 4 was added to n-hexane as a modification initiator.
- a solution dissolved at 10 wt% was injected at 130 g/h, and a solution in which the compound represented by the following formula (iii) was dissolved at 20 wt% in n-hexane as a modifier was continuously supplied to the third reactor, except that
- TMS is a trimethylsilyl group
- Me is a methyl group
- Comparative Example 1 in the same manner as in Comparative Example 1, except that 28 mmol of 3-(dimethoxy(methyl)silyl)-N,N-diethylpropan-1-amine was added as a modifier to both terminals A modified conjugated diene-based polymer was prepared.
- Comparative Example 1 in the same manner as in Comparative Example 1, except that 1.6 mmol of 3-(dimethoxy(methyl)silyl)-N,N-diethylpropan-1-amine was added as a modifier, both ends A modified conjugated diene-based polymer was prepared.
- Styrene unit (SM) and vinyl (Vinyl) contents in each polymer were measured and analyzed using Varian VNMRS 500 MHz NMR.
- 1,1,2,2-tetrachloroethane was used as the solvent, and the solvent peak was calculated as 5.97 ppm, 7.2 ⁇ 6.9 ppm random styrene, 6.9 ⁇ 6.2 ppm block styrene, and 5.8 ⁇ 5.1 ppm 1,4-vinyl, 5.1-4.5 ppm was calculated by using the peak of 1,2-vinyl as the styrene unit and vinyl content.
- a sample was prepared by dissolving 10 mg of a polymer in 1 mL of 1,1,2,2-tetrachloroethane.
- the weight average molecular weight (Mw), number average molecular weight (Mn), and maximum peak molecular weight (Mp) were measured under the following conditions through gel permeation chromatohraph (GPC) (PL GPC220, Agilent Technolodies), and a molecular weight distribution curve was obtained.
- GPC gel permeation chromatohraph
- PDI, MWD, Mw/Mn molecular weight distributions
- the number of couplings is the peak molecular weight (Mp 1 ) of the polymer by collecting some polymers before adding the modifier or coupling agent in each Example and Comparative Example, and then the peak molecular weight of each modified conjugated diene-based polymer (Mp 2 ) ) was obtained, and calculated by the following and Equation (2).
- the Mooney viscosity (MV, (ML1+4, @100°C MU) was measured at 100°C using MV-2000 (ALPHA Technologies) using a Rotor Speed 2 ⁇ 0.02 rpm, a Large Rotor, and the sample used at this time was left at room temperature (23 ⁇ 3°C) for more than 30 minutes, and then collected 27 ⁇ 3 g, filled it in the die cavity, and operated the platen to measure for 4 minutes.
- the Mooney stress relaxation rate was obtained by measuring the slope value of the Mooney viscosity change that appears as the torque is released.
- the Si content was measured using an inductively coupled plasma emission analyzer (ICP-OES; Optima 7300DV) as an ICP analysis method. Specifically, about 0.7 g of the sample is placed in a platinum crucible (Pt crucible), and about 1 mL of concentrated sulfuric acid (98 wt%, Electronic grade) is added, heated at 300° C. for 3 hours, and the sample is heated in an electric furnace (Thermo Scientific, Lindberg Blue M), after conducting the conversation with the program of the following steps 1 to 3,
- ICP-OES inductively coupled plasma emission analyzer
- step 1 initial temp 0°C, rate (temp/hr) 180 °C/hr, temp(holdtime) 180°C (1hr)
- step 2 initial temp 180°C, rate (temp/hr) 85 °C/hr, temp(holdtime) 370°C (2hr)
- step 3 initial temp 370°C, rate (temp/hr) 47 °C/hr, temp(holdtime) 510°C (3hr)
- the N content was measured using a trace nitrogen quantitative analyzer (NSX-2100H) by the NSX analysis method. Specifically, turn on the trace nitrogen quantitative analyzer (Auto sampler, Horizontal furnace, PMT & Nitrogen detector), set the carrier gas flow rate to 250 ml/min for Ar, 350 ml/min for O 2 , and 300 ml/min for the ozonizer, and heater was set to 800°C and then waited for about 3 hours to stabilize the analyzer. After the analyzer is stabilized, a calibration curve in the range of 5 ppm, 10 ppm, 50 ppm, 100 ppm and 500 ppm was prepared using Nitrogen standard (AccuStandard S-22750-01-5 ml), and the area corresponding to each concentration was obtained.
- Nitrogen standard AcuStandard S-22750-01-5 ml
- PI denotes an initiator
- M denotes a modifier or a coupling agent
- specific materials of the initiator, modifier, and coupling agent are shown in Table 3 below.
- the modified conjugated diene-based polymers of Examples 1 to 12 prepared according to an embodiment of the present invention satisfy all of the required physical properties.
- the molecular weight distribution curve is unimodal and has a PDI value of less than 1.7, so it can be predicted that the processability is quite excellent and the compounding properties are also excellent, and the Mooney relaxation rate is all 0.7 or more, preferably all 0.8 or more, so linearity This excellence is predictable.
- Comparative Example 3 in which the polymerization conversion rate was not controlled when transferred from the first reactor to the second reactor, had a high PDI value, and the Mooney stress relaxation rate was evaluated below a specific value, resulting in a balance between physical properties or linearity. It can be seen that unsatisfactory results were obtained.
- the general modified conjugated diene-based polymer has a PDI value of less than 1.7, as in Comparative Example 1, but has a bimodal molecular weight distribution curve, so it can be predicted that the processability is poor, and among the results of batch polymerization As in Comparative Examples 10 and 11, a unimodal molecular weight distribution curve may appear, but this corresponds to an extreme case in which the number of couplings is a minimum value or a maximum value. It can be seen from the above description and the evaluation result to be described later.
- Each of the modified conjugated diene-based polymers of Examples and Comparative Examples was used as a raw rubber and blended under the compounding conditions shown in Table 4 below.
- the content of the raw material in Table 4 is each part by weight based on 100 parts by weight of the raw rubber.
- the rubber specimen is kneaded through the first stage kneading and the second stage kneading.
- first stage kneading raw rubber, silica (filler), organosilane coupling agent (X50S, Evonik), process oil (TDAE oil), zincating agent (ZnO), stearic acid using a Banbari mixer with a temperature control device is used.
- antioxidant TMQ(RD) (2,2,4-trimethyl-1,2-dihydroquinoline polymer)
- antioxidant (6PPD ((dimethylbutyl)-N-phenyl-phenylenediamine)
- wax Merocrystaline Wax
- the initial temperature of the kneader was controlled to 70° C., and the first mixture was obtained at a discharge temperature of 145° C. to 155° C. after the completion of mixing.
- the primary compound, sulfur, rubber accelerator (DPG (diphenylguanidine)) and vulcanization accelerator (CZ (N-cyclohexyl-2-benzothiazyl) sulfenamide) was added and mixed at a temperature of not more than 100° C. to obtain a secondary formulation. Thereafter, a rubber specimen was prepared through a curing process at 160° C. for 20 minutes.
- each test piece was prepared according to the tensile test method of ASTM 412, and the tensile strength at the time of cutting the test piece and the tensile stress (300% modulus) at 300% elongation were measured. Specifically, tensile properties were measured at room temperature at a rate of 50 cm/min using a Universal Test Machin 4204 (Instron Co., Ltd.) tensile tester.
- the tan ⁇ value was confirmed by measuring the viscoelastic behavior against dynamic deformation at a frequency of 10 Hz and each measurement temperature (-60°C to 60°C) in film tension mode using a dynamic mechanical analyzer (GABO).
- GBO dynamic mechanical analyzer
- Mooney viscosity (MV, (ML1+4, @100°C MU)) of the secondary compound obtained during the manufacture of 1) rubber specimen was measured and the processability characteristics of each polymer were comparatively analyzed. In this case, the lower the Mooney viscosity measurement value, the lower the processability. It shows excellent properties.
- each secondary formulation was left at room temperature (23 ⁇ 3°C) for at least 30 minutes and then 27 ⁇ 3 g was collected and filled in the die cavity, and the platen was operated for measurement for 4 minutes.
- Table 6 is a set of evaluation results by varying the content of the comonomer from the set in Table 5, and it can be seen from Table 6 that the effect is not changed by changing the content of the monomers, and the physical properties confirmed in Table 5 It can be seen that the same result as the improvement result appeared.
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Abstract
Description
Claims (10)
- 겔 투과 크로마토그래피(GPC, Gel permeation chromatography)에 의한 분자량 분포 곡선이 유니모달(unimodal) 형태를 갖고,분자량 분포(PDI; MWD)가 1.0 이상 1.7 미만이며,일 말단에 하기 화학식 1로 표시되는 변성제 유래 작용기를 포함하고,다른 일 말단에 변성 개시제 유래 작용기를 포함하는 것인 변성 공액디엔계 중합체:[화학식 1]상기 화학식 1에서,R1 내지 R8은 각각 독립적으로 탄소수 1 내지 20의 알킬기이고;L1 및 L2는 각각 독립적으로 탄소수 1 내지 20의 알킬렌기이며;n은 2 내지 4의 정수이다.
- 청구항 1에 있어서,상기 화학식 1에서, R1 내지 R8은 각각 독립적으로 탄소수 1 내지 10의 알킬기인 것인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 화학식 1에서, R1 내지 R8은 각각 독립적으로 탄소수 1 내지 6의 알킬기인 것인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 화학식 1에서, R1 내지 R4는 메틸기 또는 에틸기이고, R5 내지 R8은 탄소수 1 내지 10의 알킬기인 것인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 변성 개시제는,하기 화학식 2a로 표시되는 화합물;하기 화학식 2b 내지 화학식 2e로 표시되는 화합물 중에서 선택된 화합물과 유기금속 화합물과의 반응 생성물; 및하기 화학식 2f로 표시되는 화합물;로 이루어진 군에서 선택된 1 이상의 화합물인 것인 변성 공액디엔계 중합체:[화학식 2a]상기 화학식 2a에서,Ra1 내지 Ra7은 서로 독립적으로 수소원자; 탄소수 1 내지 20의 알킬기; 탄소수 3 내지 20의 시클로알킬기; 탄소수 6 내지 20의 아릴기; 탄소수 7 내지 20의 아릴알킬기; 탄소수 7 내지 20의 알킬아릴기; 또는 헤테로원자를 포함하는 탄소수 1 내지 20의 알킬기이고,m은 0 내지 3의 정수이고,[화학식 2b]상기 화학식 2b에서,Xb1은 N 또는 O이고, Xb1가 O인 경우 Rb7 또는 Rb8은 존재하지 않고,Rb1 내지 Rb5는 서로 독립적으로 수소원자; 탄소수 1 내지 20의 알킬기; 탄소수 3 내지 20의 시클로알킬기; 탄소수 6 내지 20의 아릴기; 탄소수 7 내지 20의 아릴알킬기; 또는 탄소수 7 내지 20의 알킬아릴기이거나; 서로 근접한 2개의 치환기가 연결되어 하나의 지방족 또는 방향족 고리를 형성할 수 있으며,Rb6은 단일결합; 또는 탄소수 1 내지 12의 알킬렌기이고,Rb7 및 Rb8은 서로 독립적으로 탄소수 1 내지 14의 알킬기 또는 탄소수 6 내지 14의 아릴기이고,[화학식 2c]상기 화학식 2c에서,Rc1 내지 Rc3는 서로 독립적으로 수소원자; 탄소수 1 내지 30의 알킬기; 탄소수 2내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기, 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 또는 탄소수 3 내지 30의 헤테로고리기이며,Rc4는 단일결합; 치환기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기; 치환기로 치환 또는 비치환된 탄소수 5 내지 20의 시클로알킬렌기; 또는 치환기로 치환 또는 비치환된 탄소수 6 내지 20의 아릴렌기이고, 여기에서 상기 치환기는 탄소수 1 내지 10의 알킬기, 탄소수 5 내지 10의 시클로알킬기, 또는 탄소수 6 내지 20의 아릴기이고,Rc5는 탄소수 1 내지 30의 알킬기; 탄소수 2 내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기; 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 탄소수 3 내지 30의 헤테로고리기; 또는 하기 화학식 2c-1 또는 화학식 2c-2로 표시되는 작용기이며,k는 1 내지 5의 정수이고, Rc5 중 적어도 하나는 하기 화학식 1a 또는 화학식 1b로 표시되는 작용기이며, k가 2 내지 5의 정수인 경우 복수 개의 Rc5는 서로 동일하거나 상이할 수 있고,[화학식 2c-1]상기 화학식 2c-1에서,Rc6은 치환기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기; 치환기로 치환 또는 비치환된 탄소수 5 내지 20의 시클로알킬렌기; 또는 치환기로 치환 또는 비치환된 탄소수 6 내지 20의 아릴렌기이고, 여기에서 상기 치환기는 탄소수 1 내지 10의 알킬기, 탄소수 5 내지 10의 시클로알킬기, 또는 탄소수 6 내지 20의 아릴기이고,Rc7 및 Rc8은 서로 독립적으로 탄소수 1 내지 10의 알킬기, 탄소수 5 내지 10의 시클로알킬기, 또는 탄소수 6 내지 20의 아릴기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기이며,Rc9는 수소원자; 탄소수 1 내지 30의 알킬기; 탄소수 2 내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기; 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 탄소수 3 내지 30의 헤테로고리기이고,Xc1은 N, O 또는 S 원자이며, Xc1이 O 또는 S인 경우 Rc9는 존재하지 않으며,[화학식 2c-2]상기 화학식 2c-2에서,Rc10은 치환기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기; 치환기로 치환 또는 비치환된 탄소수 5 내지 20의 시클로알킬렌기; 또는 치환기로 치환 또는 비치환된 탄소수 6 내지 20의 아릴렌기이고, 여기에서 상기 치환기는 탄소수 1 내지 10의 알킬기, 탄소수 5 내지 10의 시클로알킬기, 또는 탄소수 6 내지 20의 아릴기이고,Rc11 및 Rc12는 서로 독립적으로 탄소수 1 내지 30의 알킬기; 탄소수 2 내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기; 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 탄소수 3 내지 30의 헤테로고리기이며,[화학식 2d]상기 화학식 2d에서,Rd1 내지 Rd5는 서로 독립적으로 수소원자; 탄소수 1 내지 30의 알킬기; 탄소수 2내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기, 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 또는 탄소수 3 내지 30의 헤테로고리기이며,Rd6은 탄소수 1 내지 30의 알킬기; 탄소수 2내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기, 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 또는 탄소수 3 내지 30의 헤테로고리기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기이고,Xd1은 하기 화학식 2d-1 또는 화학식 2d-2로 표시되는 작용기이며,[화학식 2d-1]상기 화학식 2d-1에서,Rd7 및 Rd8은 서로 독립적으로 탄소수 1 내지 10의 알킬기, 탄소수 5 내지 10의 시클로알킬기, 또는 탄소수 6 내지 20의 아릴기로 치환 또는 비치환된 탄소수 1 내지 20의 알킬렌기이며,Rd9는 수소원자; 탄소수 1 내지 30의 알킬기; 탄소수 2 내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기; 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 탄소수 3 내지 30의 헤테로고리기이고,Xd2는 N, O 또는 S 원자이며, Xd2가 O 또는 S인 경우 Rd9는 존재하지 않으며,[화학식 2d-2]상기 화학식 2d-2에서,Rd11 및 Rd12는 서로 독립적으로 탄소수 1 내지 30의 알킬기; 탄소수 2 내지 30의 알케닐기; 탄소수 2 내지 30의 알카이닐기; 탄소수 1 내지 30의 헤테로알킬기; 탄소수 2 내지 30의 헤테로알케닐기; 탄소수 2 내지 30의 헤테로알카이닐기; 탄소수 5 내지 30의 시클로알킬기; 탄소수 6 내지 30의 아릴기; 탄소수 3 내지 30의 헤테로고리기이며,[화학식 2e]상기 화학식 2e에서,Re1은 탄소수 2 내지 10의 알케닐기이고,[화학식 2f]상기 화학식 2f에서,Rf1, Rf2 및 Rf5는 서로 독립적으로 탄소수 1 내지 20의 알킬기; 탄소수 3 내지 20의 시클로알킬기; 탄소수 6 내지 20의 아릴기; 탄소수 7 내지 20의 아릴알킬기; 또는 탄소수 7 내지 20의 알킬아릴기이고,Rf3 및 Rf4는 서로 독립적으로 탄소수 1 내지 20의 알킬렌기 또는 탄소수 6 내지 20의 아릴렌기이며,p는 1 내지 5의 정수이다.
- 청구항 1에 있어서,상기 변성 공액디엔계 중합체는 수평균 분자량(Mn)이 1,000 g/mol 내지 2,000,000 g/mol이고, 중량평균 분자량(Mw)이 1,000 g/mol 내지 3,000,000 g/mol인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 변성 공액디엔계 중합체는 Si 함량 및 N 함량이 각각 중량을 기준으로 50 ppm 이상인 것인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 변성 공액디엔계 중합체는 100℃에서 측정된 무니응력 완화율이 0.7 내지 3.0 인 것인 변성 공액디엔계 중합체.
- 청구항 1에 있어서,상기 변성 공액디엔계 중합체는 커플링 수(Coupling Number, C.N)가 1 < C.N < F이고, 여기서 F는 상기 변성제의 관능기 수인 것인 변성 공액디엔계 중합체.
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Publication number | Publication date |
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JP7199777B2 (ja) | 2023-01-06 |
EP3925985A4 (en) | 2022-04-13 |
CN113574078A (zh) | 2021-10-29 |
US20220185932A1 (en) | 2022-06-16 |
KR102509517B1 (ko) | 2023-03-16 |
TW202134291A (zh) | 2021-09-16 |
SG11202110479QA (en) | 2021-10-28 |
EP3925985A1 (en) | 2021-12-22 |
BR112021022864A2 (pt) | 2022-01-04 |
JP2022521596A (ja) | 2022-04-11 |
CN113574078B (zh) | 2023-09-26 |
KR20210067949A (ko) | 2021-06-08 |
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