WO2021049915A1 - 변성 공액디엔계 중합체 및 이를 포함하는 고무 조성물 - Google Patents
변성 공액디엔계 중합체 및 이를 포함하는 고무 조성물 Download PDFInfo
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- WO2021049915A1 WO2021049915A1 PCT/KR2020/012329 KR2020012329W WO2021049915A1 WO 2021049915 A1 WO2021049915 A1 WO 2021049915A1 KR 2020012329 W KR2020012329 W KR 2020012329W WO 2021049915 A1 WO2021049915 A1 WO 2021049915A1
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- WIPO (PCT)
- Prior art keywords
- conjugated diene
- carbon atoms
- polymer
- group
- modified conjugated
- Prior art date
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- 238000006011 modification reaction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- ZUHZZVMEUAUWHY-UHFFFAOYSA-N n,n-dimethylpropan-1-amine Chemical compound CCCN(C)C ZUHZZVMEUAUWHY-UHFFFAOYSA-N 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 1
- 210000000496 pancreas Anatomy 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 125000004665 trialkylsilyl group Chemical group 0.000 description 1
- ASAOXGWSIOQTDI-UHFFFAOYSA-N triethoxy-[2-(2-triethoxysilylethyltetrasulfanyl)ethyl]silane Chemical compound CCO[Si](OCC)(OCC)CCSSSSCC[Si](OCC)(OCC)OCC ASAOXGWSIOQTDI-UHFFFAOYSA-N 0.000 description 1
- FBBATURSCRIBHN-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyldisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSCCC[Si](OCC)(OCC)OCC FBBATURSCRIBHN-UHFFFAOYSA-N 0.000 description 1
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical group CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 1
- KLFNHRIZTXWZHT-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltrisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSCCC[Si](OCC)(OCC)OCC KLFNHRIZTXWZHT-UHFFFAOYSA-N 0.000 description 1
- QKJGTZOWMVHEHS-UHFFFAOYSA-N triethoxy-[3-(phenyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSC1=CC=CC=C1 QKJGTZOWMVHEHS-UHFFFAOYSA-N 0.000 description 1
- QLNOVKKVHFRGMA-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical group [CH2]CC[Si](OC)(OC)OC QLNOVKKVHFRGMA-UHFFFAOYSA-N 0.000 description 1
- JSXKIRYGYMKWSK-UHFFFAOYSA-N trimethoxy-[2-(2-trimethoxysilylethyltetrasulfanyl)ethyl]silane Chemical compound CO[Si](OC)(OC)CCSSSSCC[Si](OC)(OC)OC JSXKIRYGYMKWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/25—Incorporating silicon atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/22—Incorporating nitrogen atoms into the molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- 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 polymer having excellent storage stability and excellent processability, tensile strength, and viscoelastic properties, and a rubber composition comprising the same.
- conjugated diene-based polymers or copolymers such as styrene-butadiene rubber (hereinafter referred to as SBR) or butadiene rubber (hereinafter referred to as BR) are 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 vinyl structure content and styrene content that define rubber properties can be arbitrarily adjusted, and molecular weight and physical properties can be controlled by coupling or modification. Is that you can. Therefore, it is easy to change the structure of the final manufactured SBR or BR, reduce the movement of the chain ends by bonding or denaturation of the chain ends, and increase the bonding strength with fillers such as silica or carbon black. It is widely used as a rubber material.
- the glass transition temperature of the rubber can be increased by increasing the vinyl content in the SBR, so that the required properties of the tire such as rolling resistance and braking force can be adjusted, as well as the glass transition temperature. Fuel consumption can be reduced by appropriate control.
- the solution polymerization SBR is prepared using an anionic polymerization initiator, and the chain ends of the formed polymer are bonded or modified using various modifiers. For example, U.S. Patent No.
- 4,397,994 proposes a technique in which the 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 bound using a binder such as a tin compound. I did.
- the polymerization of the SBR or BR may be carried out by batch or continuous polymerization.
- the molecular weight distribution of the prepared polymer is narrow, so there is an advantage in terms of improving physical properties, but productivity is low.
- productivity is excellent, and there is an advantage in terms of improving processability, but there is a problem of poor physical properties due to a wide molecular weight distribution. Therefore, when manufacturing SBR or BR, research to improve productivity, processability, and physical properties at the same time is continuously required.
- Patent Document 1 US4397994 A
- the present invention was devised to solve the problems of the prior art, and an object of the present invention is to provide a modified conjugated diene-based polymer having a molecular weight distribution change rate of 10% or less over time and excellent storage stability.
- an object of the present invention is to provide a rubber composition having excellent processability, tensile properties, and viscoelastic properties, including the modified conjugated diene-based polymer.
- the present invention is a repeating unit derived from a conjugated diene-based monomer; And it provides a modified conjugated diene-based polymer containing a functional group derived from an aminoalkoxysilane modifier, and having a molecular weight distribution change rate of 10% or less represented by the following equation:
- PDI 1 is the molecular weight distribution of the polymer before standing
- PDI 2 is the molecular weight distribution of the polymer after standing at 25° C. for 90 days.
- the present invention provides a rubber composition comprising the modified conjugated diene-based polymer and a filler.
- the modified conjugated diene polymer according to the present invention has a molecular weight distribution change rate of 10% or less, has excellent storage stability, has excellent filler affinity by including a functional group derived from an aminoalkoxysilane modifier, and contains a macromonomer-derived unit. By doing so, there is an effect that the filler affinity is more excellent.
- the rubber composition according to the present invention may have excellent processability, tensile properties, and viscoelastic properties by including the modified conjugated diene-based polymer.
- the term'macromonomer' refers to a unit in which two or more units derived from a polymerization-reactive monomer are repeated, and refers to a unit capable of bonding with another polymer chain or a reactive compound through an end group.
- the term'polymer' refers to a polymer compound prepared by polymerizing monomers.
- the generic term polymer encompasses the term homopolymer and the term copolymer, which are commonly used to refer to polymers made from only one monomer.
- the term'first chain' may refer to a molecular chain of a main skeleton constituting a polymer, and may refer to a chain mainly including a conjugated diene-based monomer or a repeating unit of a conjugated diene-based monomer and an aromatic vinyl-based monomer.
- the'second chain' may refer to a chain having a smaller number of repeating units than the first chain, and mainly including a repeating unit of an N-functional group-containing monomer.
- alkyl group' may mean a monovalent saturated aliphatic hydrocarbon, and may include linear alkyl groups such as methyl, ethyl, propyl, and butyl; It may mean including all branched alkyl groups such as isopropyl, sec-butyl, tert-butyl, and neo-pentyl.
- alkylene group' may mean a divalent saturated aliphatic hydrocarbon such as methylene, ethylene, propylene, and butylene.
- heterocyclic group' refers to a cycloalkyl group or an aryl group in which a carbon atom is substituted with one or more heteroatoms, and may mean including all of a heterocycloalkyl group or a heteroaryl group.
- substitution' may mean that a functional group, an atomic group, or hydrogen of a compound is substituted with a specific substituent.
- a functional group, an atomic group, or hydrogen of a compound is substituted with a specific substituent
- the functional group, atomic group, or compound Depending on the number of hydrogens present, one or two or more of a plurality of substituents may be present, and when a plurality of substituents are present, each of the substituents may be the same or different from each other.
- the term'single bond' may refer to a single covalent bond that does not include a separate atom or molecular group.
- derived unit and “derived functional group” may refer to a component, a structure, or the substance itself derived from a substance.
- the term'vinyl content' refers to the mass (or weight) of butadiene contained at positions 1 and 2 in the polymer chain based on the conjugated diene monomer (butadiene, etc.) part (total amount of polymerized butadiene) in the polymer. ) Refers to the percent.
- the term'molecular weight distribution change rate (%)' refers to the degree of change in the molecular weight distribution over time of the polymer. It shows the difference between the molecular weight distributions measured after (left 90 days).
- the term'Mooney viscosity change rate (%)' refers to the degree of change in Mooney viscosity over time of the polymer. It shows the difference between the Mooney viscosity measured after (90 days left to stand).
- compositions claimed through the use of the term'comprising', whether polymer or otherwise, may contain any additional additives, adjuvants, or compounds, unless stated to the contrary.
- the term'consisting essentially of' excludes from the scope of any subsequent description any other component, step or procedure, except that it is not essential to operability.
- the term'consisting of' excludes any component, step or procedure not specifically described or listed.
- Mw weight average molecular weight
- Mn number average molecular weight
- Mw/Mn molecular weight distribution
- PDI molecular weight distribution
- the GPC is used by combining two columns of PLgel Olexis (Polymer Laboratories) and one column of PLgel mixed-C (Polymer Laboratories), and when calculating the molecular weight, the GPC standard material is PS (polystyrene). It is carried out using, and the GPC measurement solvent is prepared by mixing 2 wt% of an amine compound in tetrahydrofuran.
- Mooney viscosity' is measured using a Mooney viscometer. Specifically, the polymer is at room temperature (23 ⁇ 3°C) under conditions of 100°C and Rotor Speed 2 ⁇ 0.02 rpm using a Large Rotor of Monsanto's MV2000E. After leaving for at least 30 minutes, 27 ⁇ 3 g was collected, filled inside the die cavity, and measured while applying torque by operating a platen.
- the'N atomic content' may be measured through an NSX analysis method as an example, and the NSX analysis method is measured using a trace nitrogen quantitative analyzer (NSX-2100H).
- a trace nitrogen quantitative analyzer NSX-2100H
- the trace nitrogen quantitative analyzer turn on the trace nitrogen quantitative analyzer (Auto sampler, Horizontal furnace, PMT & Nitrogen detector), Ar 250 ml/min, O 2 350 ml/min, ozonizer 300 ml/ Set the carrier gas flow rate in min, set the heater to 800°C, and wait for about 3 hours to stabilize the analyzer.
- the analyzer After the analyzer is stabilized, use the Nitrogen standard (AccuStandard S-22750-01-5 ml) to prepare calibration curves for the ranges of 5 ppm, 10 ppm, 50 ppm, 100 ppm and 500 ppm, and obtain the area corresponding to each concentration. After that, create a straight line using the ratio of the density to the area. Thereafter, a ceramic boat containing 20 mg of a sample is placed in the auto sampler of the analyzer to obtain an area, and the N content is calculated using the area of the obtained sample and the calibration curve. At this time, the sample is a modified conjugated diene-based polymer from which the solvent is removed by placing it in hot water heated by steam and stirring. The residual monomer, residual denaturant, and oil have been removed.
- Nitrogen standard AcuStandard S-22750-01-5 ml
- the'Si atomic 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 a sample was put into a platinum crucible (Pt crucible), about 1 mL of concentrated sulfuric acid (98% by weight, Electronic grade) was added, heated at 300° C. for 3 hours, and the sample was heated in an electric furnace (Thermo Scientific, Lindberg Blue M), after conducting conversation with the program of steps 1 to 3 below,
- 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 present invention provides a modified conjugated diene polymer having excellent storage stability and excellent filler affinity.
- the modified conjugated diene-based polymer according to an embodiment of the present invention includes a repeating unit derived from a conjugated diene-based monomer; And a functional group derived from an aminoalkoxysilane modifier, and a rate of change in molecular weight distribution calculated by the following equation (1) is 10% or less.
- PDI 1 is the molecular weight distribution of the polymer before standing
- PDI 2 is the molecular weight distribution of the polymer after standing at 25° C. for 90 days.
- the modified conjugated diene-based polymer has a moiety derived from a denaturing agent, such as an alkoxy group (-OR, where R is a hydrocarbon group) or a hydroxyl group (-OH), and condensation reaction or hydrolysis from the moiety over time. Reaction occurs, storage stability decreases, Mooney viscosity increases, molecular weight distribution increases, and thus the excellent properties of the blended properties of the modified conjugated diene-based polymer cannot be maintained, so that the desired properties cannot be obtained when applied to a rubber composition. there is a problem.
- a denaturing agent such as an alkoxy group (-OR, where R is a hydrocarbon group) or a hydroxyl group (-OH)
- the modified conjugated diene-based polymer according to an embodiment of the present invention is prepared by a method described below that includes reacting a macromonomer after a denaturation reaction or a coupling reaction between an active polymer and a denaturant. It may have a structure in which the macromonomer-derived unit is bonded to an alkoxy group, which is a derived moiety, and as a result, the moiety derived from the denaturant in the polymer does not exist or is reduced compared to the existing manufacturing method.
- the modified conjugated diene-based polymer according to the present invention may have a very low molecular weight distribution change rate of 10% or less over time, so it has excellent storage stability, and thus the blending properties consistently maintain excellent properties even at the beginning of manufacture or after time. I can.
- the modified conjugated diene-based polymer according to an embodiment of the present invention has the advantage of being able to introduce more functional groups than when only a modifier having a large number of functional groups is used by being prepared by a manufacturing method described below.
- the alkoxy group of the active polymer and the modifier is difficult to bind two or more polymer chains to one molecule of the modifier due to steric hindrance of the polymer, and although three or more chains may be bonded, a modified polymer in which three or more chains are coupled. Is bound to be a trace amount.
- the production method according to the present invention allows the macromonomer-derived unit containing a functional group to be bonded to the alkoxy moiety of the denaturant to which the polymer chain is bonded, regardless of the steric hindrance as described above, thereby introducing more functional groups in the polymer chain. can do.
- the introduction of a functional group in one molecule of the modifier is clearly limited, and no matter how many are introduced, the absolute functional group in the polymer is compared with the case of bonding a chain containing a functional group to an alkoxy moiety without the effect of steric hindrance as in the present invention. There must be a difference in quantity.
- the modified conjugated diene-based polymer according to the present invention may have excellent tensile properties and viscoelastic properties compared to the existing terminal-end modified polymer.
- one end of the polymer since it is manufactured by a manufacturing method using a moiety derived from a modifier, one end of the polymer has a non-functional property, and thus tensile properties and viscoelastic properties may be superior to that of a conventional modified conjugated diene-based polymer at both ends.
- condensation reaction in which the active polymer is modified with a modifier and a compound capable of condensation with the Si-O bond of the modifier has been applied as a means to additionally introduce a functional group to the polymer.
- the condensation reaction when used in this way, the bond between the substance having an additional functional group and the modified active polymer is formed into -Si-O-Si-, and hydrolysis may occur during the subsequent steam stripping step, washing step, or storage. Is present, and thus there is a problem in that the bond is separated at the condensation bonding site, resulting in a problem in which a functional group is lost.
- the living end of the macromonomer reacts with the Si-OR group of the denaturant to form a Si-C bond, and this bond is a bond that does not undergo a hydrolysis reaction, such as a condensation bond.
- a hydrolysis reaction such as a condensation bond
- the modified conjugated diene-based polymer may have a rate of change in the molecular weight distribution of 10% or less, more specifically 5% or less.
- the rate of change in the molecular weight distribution indicates the degree of change in the molecular weight distribution over time of the polymer, and the smaller the degree of change, the better the storage stability of the modified conjugated diene-based polymer.
- Numerical limitation means one technical means that enables the technical object of the present invention to be achieved.
- the modified conjugated diene-based polymer may have a Mooney viscosity change rate calculated by Equation 2 below of 10% or less, specifically 5% or less.
- Mooney viscosity increase rate (%) [
- MV 1 is the Mooney viscosity measured at 100°C of the polymer before standing
- MV 2 is the Mooney viscosity measured at 100°C after standing at 25°C for 90 days.
- the Mooney viscosity change rate indicates the degree of change in the Mooney viscosity over time of the polymer, and the smaller the degree of change, the better the storage stability of the modified conjugated diene-based polymer, and the '10% or less' Numerical limitation of is intended to mean another technical means that enables the technical problem in the present invention to be achieved.
- the modified conjugated diene-based polymer according to the present invention has a molecular weight distribution conversion rate of 10% or less, and a Mooney viscosity change rate of 10% or less, specifically, a molecular weight distribution change rate of 5% or less, and a Mooney viscosity change rate This may be 5% or less, and in this case, storage stability may be more excellent.
- the modified conjugated diene-based polymer may include a repeating unit derived from a conjugated diene-based monomer and a functional group derived from an aminoalkoxysilane-based modifying agent.
- the modified conjugated diene-based polymer according to an embodiment of the present invention further includes a macromonomer-derived unit, and the macromonomer is a repeating unit derived from an N-functional group-containing monomer or a repeating unit derived from an N-functional group-containing monomer, and It may include a repeating unit derived from a conjugated diene-based monomer.
- the modified conjugated diene-based polymer according to an embodiment of the present invention includes a first chain including a repeating unit derived from a conjugated diene-based monomer; A second chain comprising a macromonomer-derived unit; And a unit derived from an aminoalkoxysilane modifier, and the macromonomer may include a repeating unit derived from an N-functional group-containing monomer or a repeating unit derived from an N-functional group-containing monomer and a conjugated diene-based monomer.
- the modified conjugated diene-based polymer may be prepared by a method described below including reacting a macromonomer after a denaturation reaction or a coupling reaction between an active polymer and a denaturant, and a repeating unit derived from a conjugated diene-based monomer , A first chain comprising a denaturant-derived unit and a macromonomer-derived unit, more specifically, a conjugated diene-based monomer-derived repeating unit; A second chain comprising a macromonomer-derived unit; And a unit derived from an aminoalkoxysilane modifier.
- first chain and the second chain may have a structure coupled to each other by a unit derived from the denaturant, for example, the macromolecule in a unit derived from a denaturant bonded to at least one end of the first chain and the first chain. It may have the same structure as a graft copolymer to which a second chain derived from a monomer is bonded.
- a moiety derived from a denaturant such as an alkoxy group not bonded to the first chain, reacts with the macromonomer to remove the alkoxy group, and the second chain derived from the macromonomer is bonded, so that storage stability can be excellent. have.
- the repeating unit derived from the conjugated diene-based monomer may mean a repeating unit formed when the conjugated diene-based monomer is polymerized, and the functional group derived from the modifier may mean a functional group derived from a modifier present at least at one end of the polymer chain.
- the modified conjugated diene-based polymer may further include a repeating unit derived from an aromatic vinyl-based monomer
- the modified conjugated diene-based polymer is a repeating unit derived from a conjugated diene-based monomer, It may be a copolymer containing a repeating unit derived from an aromatic vinyl monomer 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 -Phenyl-1,3-butadiene and 2-halo-1,3-butadiene (halo means a halogen atom) may be one or more selected from the group consisting of.
- 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).
- 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 diene-based monomer-derived repeating unit 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 a diene-based monomer-derived repeating unit in excess of 0% to 1% by weight, more than 0% to 0.1% by weight, It may be included in an amount exceeding 0% by weight to 0.01% by weight, or exceeding 0% by weight to 0.001% by weight, and there is an effect of preventing gel formation within this range.
- the copolymer may be a random copolymer, and in this case, there is an effect of having an excellent balance between physical properties.
- the random copolymer may mean that the repeating units constituting the copolymer are randomly arranged.
- the N-functional group may basically be an amino group, and may be an alicyclic amino group, an aliphatic chain amino group, an aromatic amino group, or the like.
- the N-functional group-containing monomer may be a compound represented by the following formula (4).
- R 11a and R 11b are each independently an alkyl group having 1 to 20 carbon atoms; An alkenyl group having 2 to 20 carbon atoms; An alkynyl group having 2 to 20 carbon atoms; A heteroalkyl group having 1 to 20 carbon atoms; A heteroalkenyl group having 2 to 20 carbon atoms; A heteroalkynyl group having 2 to 20 carbon atoms; A cycloalkyl group having 5 to 20 carbon atoms; Aryl group having 6 to 20 carbon atoms; A heterocyclic group having 3 to 20 carbon atoms; Or a functional group represented by the following formula 1a,
- R 11c is an alkenyl group having 2 to 20 carbon atoms
- At least one of R 11a and R 11b is a functional group represented by Formula 1a,
- R 11d is a single bond or an alkylene group having 1 to 20 carbon atoms unsubstituted or substituted with a substituent; A cycloalkylene group having 5 to 20 carbon atoms substituted or unsubstituted 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 11e and R 11f are each independently an alkyl group having 1 to 20 carbon atoms; An alkenyl group having 2 to 20 carbon atoms; An alkynyl group having 2 to 20 carbon atoms; A heteroalkyl group having 1 to 20 carbon atoms; A heteroalkenyl group having 2 to 20 carbon atoms; A heteroalkynyl group having 2 to 20 carbon atoms; A cycloalkyl group having 5 to 20 carbon atoms; Aryl group having 6 to 20 carbon atoms; A heterocyclic group having 3 to 20 carbon atoms; Or a mono-, di- or tri-substituted alkylsilyl group substituted with an alkyl group having 1 to 10 carbon atoms.
- R 11a and R 11b are each independently 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 1a, R 11c is an alkenyl group having 1 to 10 carbon atoms, in Formula 1a, R 11d is a single bond or an unsubstituted alkylene group having 1 to 10 carbon atoms, and R 11e and R 11f are Independently of each other, an alkyl group having 1 to 10 carbon atoms; Or it may be a mono-, di- or tri-substituted alkylsilyl group substituted with an alkyl group having 1 to 10 carbon atoms.
- R 11a and R 11b are each independently a functional group represented by Formula 1a
- R 11c is an alkenyl group having 1 to 6 carbon atoms
- R 11d is a single bond or unsubstituted
- R 11e and R 11f are each independently an alkyl group having 1 to 6 carbon atoms; Or it may be a trialkylsilyl group substituted with an alkyl group having 1 to 6 carbon atoms.
- the compound represented by Formula 4 may be one or more selected from compounds represented by the following Formulas 4-1 to 4-3.
- Me is a methyl group.
- the modifier may be a filler affinity modifier, such as 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, It may mean a functional group capable of interaction between the functional groups derived from the denaturant.
- the modifier may be one or more selected from compounds represented by the following Chemical Formulas 1 to 3.
- a 1 and A 2 are each independently an alkylene group having 1 to 20 carbon atoms
- R 17 to R 20 are each independently an alkyl group having 1 to 20 carbon atoms
- L 1 to L 4 are each independently a mono-, di- or tri-substituted alkylsilyl group substituted with an alkyl group having 1 to 10 carbon atoms, or an alkyl group having 1 to 20 carbon atoms,
- X is an oxygen atom or an alkylene group having 1 to 20 carbon atoms
- R 1 is a single bond or an alkylene group having 1 to 10 carbon atoms
- R 2 and R 3 are each independently an alkyl group having 1 to 10 carbon atoms
- R 4 is hydrogen, an epoxy group, an alkyl group having 1 to 10 carbon atoms, an allyl group having 2 to 10 carbon atoms, a mono-, di- or tri-substituted alkylsilyl group substituted with an alkyl group having 1 to 10 carbon atoms, or a carbon number of 2 to 10 Is a heterocyclic group,
- R 21 is a single bond, an alkylene group having 1 to 10 carbon atoms, or -[R 42 O] j -, wherein R 42 is an alkylene group having 1 to 10 carbon atoms, and j is an integer selected from 1 to 30,
- a and m are each independently an integer selected from 1 to 3,
- n is an integer from 0 to 2
- R 5 , R 6 and R 9 are each independently an alkylene group having 1 to 10 carbon atoms
- R 7 , R 8 , R 10 and R 11 are each independently an alkyl group having 1 to 10 carbon atoms
- R 12 is hydrogen or an alkyl group having 1 to 10 carbon atoms
- b and c are each independently 1, 2 or 3, but b+c ⁇ 4,
- R 13 , R 14 , R 15 and R 16 are each independently hydrogen or an alkyl group having 1 to 10 carbon atoms.
- a 1 and A 2 are each independently an alkylene group having 1 to 20 carbon atoms
- R 17 to R 20 are each independently an alkyl group having 1 to 20 carbon atoms
- L 1 to L 4 are independent of each other
- X may be an oxygen atom or an alkylene group having 1 to 20 carbon atoms.
- a 1 and A 2 are each independently an alkylene group having 1 to 10 carbon atoms
- R 17 to R 20 are each independently an alkyl group having 1 to 10 carbon atoms
- L 1 to L 4 are each Independently, a tetravalent alkylsilyl group substituted with an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 10 carbon atoms
- X may be an oxygen atom or an alkylene group having 1 to 10 carbon atoms.
- the compound represented by Formula 1 is 3,3'-(1,1,3,3-tetramethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine) (3,3'-(1,1,3,3-tetramethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine)), 3,3'-(1,1,3,3 -Tetraethoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine)(3,3'-(1,1,3,3-tetraethoxydisiloxane-1,3-diyl)bis (N,N-dimethylpropan-1-amine)), 3,3'-(1,1,3,3-tetrapropoxydisiloxane-1,3-diyl)bis(N,N-dimethylpropan-1-amine)), 3,3'-(1,1,3,3-te
- the compound represented by Formula 1 may be one or more selected from compounds represented by the following Formulas 1-1 to 1-3.
- Me is a methyl group
- Et is an ethyl group
- the compound represented by Formula 2 is a specific example, N,N-bis(3-(dimethoxy(methyl)silyl)propyl)-methyl-1-amine (N,N-bis(3-(dimethoxy(methyl) )silyl)propyl)-methyl-1-amine), N,N-bis(3-(diethoxy(methyl)silyl)propyl)-methyl-1-amine(N,N-bis(3-(diethoxy(methyl )silyl)propyl)-methyl-1-amine), N,N-bis(3-(trimethoxysilyl)propyl)-methyl-1-amine (N,N-bis(3-(trimethoxysilyl)propyl)- methyl-1-amine), N,N-bis(3-(triethoxysilyl)propyl)-methyl-1-amine (N,N-bis(3-(triethoxysilyl)propyl)-methyl-1-amine) , Tri(trimethoxysilyl)
- the compound represented by Formula 2 may be one or more selected from compounds represented by Formula 2-1 and Formula 2-2 below.
- Me is a methyl group.
- the compound represented by Formula 3 is a specific example, N-(3-(1H-imidazol-1-yl)propyl)-3-(triethoxysilyl)-N-(3-(triethoxysilyl )Propylpropan-1-amine (N-(3-(1H-imidazol-1-yl)propyl)-3-(triethoxysilyl)-N-(3-(triethoxysilyl)propyl)propan-1-amine), N- (3-(1H-imidazol-1-yl)propyl)-3-(trimethoxysilyl)-N-(3-(trimethoxysilyl)propylpropan-1-amine (N-(3-(1H -imidazol-1-yl)propyl)-3-(trimethoxysilyl)-N-(3-(trimethoxysilyl)propyl)propan-1-amine) and 3-(4,5-dihydr
- the compound represented by Formula 3 may be a compound represented by Formula 3-1 below.
- Me is a methyl group.
- 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 /mol, and a weight average molecular weight (Mw) of 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, within this range
- Mn number average molecular weight
- Mw weight average molecular weight
- the modified conjugated diene-based polymer may have a molecular weight distribution (PDI; MWD; Mw/Mn) of 1.0 or more and 3.0 or less, 1.1 or more and 2.5 or more, or 1.1 or more and 2.0 or less, and within this range, tensile properties and viscoelastic properties are It is excellent, and there is an effect of excellent balance between physical properties.
- the molecular weight distribution may represent a value measured at the initial stage of polymer production (at 0 day left to stand).
- the modified conjugated diene-based polymer may have a Mooney viscosity at 100° C., 30 or more, 40 to 150, or 40 to 140, and has excellent processability and productivity within this range.
- the Mooney viscosity may represent a value measured at the initial stage of manufacturing the polymer (at 0 day left to stand).
- the modified conjugated diene-based polymer may have a Si content of 100 ppm or more, 100 ppm to 10,000 ppm, or 100 ppm to 5,000 ppm, based on weight, and includes a modified conjugated diene-based polymer within this range.
- the rubber composition has excellent mechanical properties such as tensile properties and viscoelastic properties.
- the Si content may mean the content of Si atoms present in the modified conjugated diene-based polymer. Meanwhile, the Si atom may be derived from a functional group derived from a denaturant.
- the modified conjugated diene-based polymer may have an N content of 70 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, and within this range There is an effect excellent in mechanical properties such as tensile properties and viscoelastic properties of a rubber composition containing a diene polymer.
- the N content may mean the content of a nitrogen atom present in the modified conjugated diene-based polymer, and the nitrogen atom may be derived from a functional group derived from a denaturant.
- the modified conjugated diene-based polymer may have a vinyl content of 5% by weight or more, 10% by weight or more, or 10% by weight to 60% by weight.
- the vinyl content refers to the content of 1,2-added conjugated diene-based monomer, not 1,4-added, based on 100% by weight of the conjugated diene-based copolymer composed of a monomer having a vinyl group and an aromatic vinyl-based monomer. I can.
- the modified conjugated diene-based polymer may be prepared through a manufacturing method described below.
- the method for preparing the modified conjugated diene-based polymer according to an embodiment of the present invention is a step of 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 polymerization initiator to prepare an active polymer (S1). ; Preparing a modified active polymer by reacting or coupling the active polymer with an aminoalkoxysilane modifier (S2); And reacting the modified active polymer with the macromonomer (S3).
- conjugated diene-based monomer aromatic vinyl monomer
- aminoalkoxysilane-based modifier are as described above.
- the hydrocarbon solvent is not particularly limited, but may be, for example, one or more selected from the group consisting of n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene, and xylene.
- the polymerization initiator is 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 a total of 100 g of monomers. Can be used.
- the polymerization initiator is not particularly limited, for example, methyllithium, ethyllithium, propyllithium, n-butyllithium, s-butyllithium, t-butyllithium, hexyllithium, n-decyllithium, t-octyllithium, Phenyllithium, 1-naphthyllithium, n-eicosyllithium, 4-butylphenyllithium, 4-tolyllithium, cyclohexyllithium, 3-5-di-n-heptylcyclohexyllithium, 4-cyclopentyllithium, naph Tyl sodium, naphthyl potassium, lithium alkoxide, sodium alkoxide, potassium alkoxide, lithium sulfonate, sodium sulfonate, potassium sulfonate, lithium amide, sodium amide, potassium amide and lithium isopropylamide. have.
- the polymerization in step (S1) may be an anionic polymerization as an example, and a specific example may be a living anionic polymerization having an anionic active site at the polymerization end by a growth polymerization reaction by an anion.
- the polymerization in step (S1) may be elevated temperature polymerization, isothermal polymerization, or constant temperature polymerization (insulation polymerization), and the constant temperature polymerization includes polymerization by self-reaction heat without optionally applying heat after the polymerization initiator is added.
- the elevated-temperature polymerization may mean a polymerization method in which heat is arbitrarily applied after the polymerization initiator is added to increase the temperature, and the isothermal polymerization is heated by applying heat after the polymerization initiator is added. It may mean a polymerization method in which the temperature of the polymerized product is kept constant by increasing or taking away heat.
- the polymerization in step (S1) may further include a diene-based compound having 1 to 10 carbon atoms in addition to the conjugated diene-based monomer.
- a diene-based compound having 1 to 10 carbon atoms in addition to the conjugated diene-based monomer.
- the diene-based compound it may be 1,2-butadiene.
- step (S1) may be carried out in a temperature range of 80°C or less, -20°C to 80°C, 0°C to 80°C, 0°C to 70°C, or 10°C to 70°C, for example, within this range.
- a temperature range of 80°C or less 80°C or less, -20°C to 80°C, 0°C to 80°C, 0°C to 70°C, or 10°C to 70°C, for example, within this range.
- the first active polymer prepared by the step (S1) may mean a polymer in which a polymer anion and an organic metal cation are bonded.
- the polymerization of step (S1) may be carried out including a polar additive, and the polar additive is added in a ratio of 0.001 g to 50 g, 0.001 g to 10 g, or 0.005 g to 0.1 g based on a total of 100 g of monomers. can do.
- the polar additive may be added in a ratio of 0.001g to 10g, 0.005g to 5g, and 0.005g to 4g based on a total of 1 mmol of the denaturation initiator.
- the polar additives include, for example, tetrahydrofuran, 2,2-di (2-tetrahydrofuryl) propane, diethyl ether, cycloamyl 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 one or more selected from the group consisting of ethylenediamine, sodium mentholate, and 2-ethyl tetrahydrofurfuryl ether, preferably triethylamine, tetramethylethylenediamine, sodium It may be mentholate (sodium mentholate) or 2-ethyl tetrahydrofurfuryl ether, and when the polar additive is included, a conjugated diene-based monomer, or a conjugated diene-based monomer and an aromatic vinyl-based monomer are copolymerized. In the case of making, there is an effect of inducing a random copolymer to be easily
- the step (S2) is a step for preparing a modified active polymer by reacting the active polymer with an aminoalkoxysilane modifier, wherein the reaction may be a modification or a coupling reaction, wherein the modifier is a total of 100 g of monomers It can be used in an amount of 0.01 mmol to 10 mmol based on.
- the modifier may be used in a molar ratio of 1:0.1 to 10, 1: 0.1 to 5, or 1:0.1 to 1:3, based on 1 mole of the polymerization initiator in step (S1).
- step (S3) is a step for preparing a modified conjugated diene-based polymer by reacting a modified active polymer with a macromonomer.
- the manufacturing method according to an embodiment of the present invention may further include the step of preparing a macromonomer before step (S3), and the step of preparing the macromonomer includes N in the presence of an organolithium compound in a hydrocarbon solvent.
- -It may be performed by polymerization of a functional group-containing monomer or an N-functional group-containing monomer and a conjugated diene-based monomer.
- the polymerization reaction may be a living anionic polymerization having an anionic active site at the polymerization end by a growth polymerization reaction by an anion, and thus, the macromonomer may be a living anionic end in which one end can act as a monomer.
- the organolithium compound may be an alkyllithium compound, specifically methyllithium, ethyllithium, propyllithium, isopropyllithium, n-butyllithium, s-butyllithium, t-butyllithium, hexyllithium, n -Decyllithium, t-octyllithium, phenyllithium, 1-naphthyllithium, n-eicosyllithium, 4-butylphenyllithium, 4-tolyllithium, cyclohexyllithium, 3,5-di-n-heptylcyclohexyl It may be lithium or 4-cyclopentylium, more specifically n-butyllithium.
- the macromonomer may be used in an amount of 0.1 to 4.0 moles, 0.1 to 2.0 moles, or 0.5 to 1.5 moles relative to 1 mole of the polymerization initiator.
- the modified active polymer and the conjugated diene-based macromonomer may be to prepare a modified conjugated diene-based polymer by reacting the functional group derived from the denaturant in the modified active polymer with the living anion end of the macromonomer.
- the modified active polymer chain prepared in step (S2) contains a functional group derived from a denaturant, and the functional group derived from the denaturant contains an alkoxy group remaining without reacting with the polymer chain, and thus the living anion of the macromonomer It may be that the terminal and the alkoxy group react to prepare the modified conjugated diene-based polymer.
- the modified active polymer prepared in step (S2) contains an alkoxy group, which is a residue that has not reacted with the active polymer, derived from a denaturant, and the alkoxy group and conjugated diene macromonomer are reacted with the conjugated diene macromonomer.
- the alkoxy group is removed, and the macromonomer-derived unit is bonded to each other, thereby producing a modified conjugated diene-based polymer having very low storage stability with a rate of change in molecular weight distribution of 10% or less over time.
- the present invention provides a rubber composition comprising the modified conjugated diene-based polymer.
- the rubber composition may contain the modified conjugated diene-based polymer in an amount of 10% by weight or more, 10% by weight to 100% by weight, or 20% by weight to 90% by weight, and within this range, tensile strength, abrasion resistance, etc. It has excellent mechanical properties and excellent balance between properties.
- the rubber composition may further include other rubber components as necessary in addition to the modified conjugated diene-based polymer, and in this case, 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 include natural rubber (NR) including cis-1,4-polyisoprene; Modified natural rubber such as epoxidized natural rubber (ENR), deproteinized natural rubber (DPNR), hydrogenated natural rubber, etc.
- NR natural rubber
- EMR epoxidized natural rubber
- DPNR deproteinized natural rubber
- hydrogenated natural rubber etc.
- Styrene-butadiene copolymer SBR
- polybutadiene BR
- polyisoprene IR
- butyl rubber IIR
- ethylene-propylene copolymer polyisobutylene-co-isoprene, 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-diene), polysulfide rubber, acrylic rubber, urethane rubber, silicone rubber, epichlorohydrin rubber, halogenated butyl rubber, and the like, and any one or a mixture of two or more of them may be used.
- 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 a silica-based filler as an example, and a specific example may be wet silica (hydrous silicic acid), dry silica (silicic anhydride), calcium silicate, aluminum silicate, or colloidal silica, and preferably, the effect of improving fracture properties and wet It may be wet-type silica that has the best effect of both wet grip.
- the rubber composition may further include a carbon-based filler if necessary.
- silica when silica is used as the filler, a silane coupling agent for improving reinforcing properties and low heat generation properties may be used together, and as a specific example, the silane coupling agent is bis(3-triethoxysilylpropyl)tetrasulfide.
- it when considering the effect of improving reinforcing properties, it may be bis(3-triethoxysilylpropyl)polysulfide or 3-trimethoxysilylpropylbenzothiazyltetrasulfide.
- the amount of the silane coupling agent is usually It may be less than the case, and accordingly, the silane coupling agent may be used in an amount of 1 to 20 parts by weight, or 5 to 15 parts by weight based on 100 parts by weight of silica, and the effect as a coupling agent within this range is While sufficiently exerted, there is an effect of preventing the gelation of the rubber component.
- the rubber composition according to an embodiment of the present invention may be sulfur crosslinkable, and may further include a vulcanizing agent.
- the vulcanizing agent may specifically be a sulfur powder, and may be included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the rubber component, within this range, while securing the required elastic modulus and strength of the vulcanized rubber composition, and at the same time having low fuel economy. It has an excellent effect.
- the rubber composition according to an embodiment of the present invention includes 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, and zinc. white), stearic acid, a thermosetting resin, or a thermoplastic resin.
- the vulcanization accelerator is, for example, a thiazole compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyl disulfide), CZ (N-cyclohexyl-2-benzothiazylsulfenamide), or DPG
- a thiazole compound such as M (2-mercaptobenzothiazole), DM (dibenzothiazyl disulfide), 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, and may be, for example, a paraffinic, naphthenic, or aromatic compound, and when considering tensile strength and abrasion resistance, when considering aromatic process oil price, hysteresis loss, and low-temperature characteristics Naphthenic or paraffinic process oil 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, and within this range, there is an effect of preventing a decrease in tensile strength and low heat generation (low fuel economy) of the vulcanized rubber.
- the antioxidant is, for example, 2,6-di-t-butylparacresol, dibutylhydroxytoluenyl, 2,6-bis((dodecylthio)methyl)-4-nonylphenol (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 anti-aging agent 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 condensation product of diphenylamine and acetone, and the like, and 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, or an internal mixer according to the formulation, 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, or an internal mixer according to the formulation
- the rubber composition is a tire tread, under tread, side wall, carcass coated rubber, belt coated rubber, bead filler, pancreas, or bead coated rubber, and other tire members, anti-vibration rubber, belt conveyor, hose, etc. It may be useful in the manufacture of various industrial rubber products.
- the present invention provides a tire manufactured using the rubber composition.
- the tire may include a tire or a tire tread.
- n-hexane 3 kg of n-hexane, 215 g of styrene, 745 g of 1,3-butadiene, and 1.29 g of 2,2-bis(2-oxoranyl)propane as a polar additive were added, and then n-butyl Lithium 3.2 g (10wt% in n-hexane) was added, and the internal temperature of the reactor was adjusted to 60°C, and an adiabatic heating reaction was performed.
- the resulting polymer was put in hot water heated with steam, stirred to remove the solvent, and then roll-dried to remove the remaining amount of solvent and water, thereby preparing a modified styrene-butadiene copolymer.
- n-hexane 3 kg of n-hexane, 215 g of styrene, 745 g of 1,3-butadiene, and 1.29 g of 2,2-bis(2-oxoranyl)propane as a polar additive were added, and then n-butyl Lithium 3.2 g (10wt% in n-hexane) was added, and the internal temperature of the reactor was adjusted to 60°C, and an adiabatic heating reaction was performed.
- Example 1 a solution containing the macromonomer prepared in Preparation Example instead of n-butyllithium was added in an amount such that n-butyllithium of Example 1 and the macromonomer became equimolar to proceed with an adiabatic heating reaction. Then, a modified styrene-butadiene copolymer was prepared in the same manner as in Example 1, except that the step of adding and reacting a denaturant and a macromonomer was not performed, and the reaction was stopped after capping butadiene.
- Example 1 a solution containing the macromonomer prepared in Preparation Example instead of n-butyllithium was added in an amount such that n-butyllithium of Example 1 and the macromonomer became equimolar to proceed with an adiabatic heating reaction. , After the denaturation reaction, a modified styrene-butadiene copolymer was prepared in the same manner as in Example 1, except that the reaction was stopped without performing the step of adding and reacting a macromonomer.
- styrene units (SM) and vinyl (Vinyl) in each of the polymers were measured and analyzed using Varian VNMRS 500 MHz NMR.
- the weight average molecular weight (Mw) and number average molecular weight (Mn) were measured through GPC (Gel permeation Chromatography) analysis.
- the molecular weight distribution (PDI 1 , MWD, Mw/Mn) was obtained by calculating from the measured molecular weights.
- the GPC is used by combining two columns of PLgel Olexis (Polymer Laboratories) and one column of PLgel mixed-C (Polymer Laboratories). It was carried out using.
- the GPC measurement solvent was prepared by mixing 2% by weight of an amine compound in tetrahydrofuran.
- the rate of change in molecular weight distribution (%) is obtained by measuring the weight average molecular weight and number average molecular weight by the above-described method after leaving each polymer at 25° C. for 90 days to obtain a molecular weight distribution (PDI 2 ), It was calculated through 1.
- PDI 1 is the molecular weight distribution of the polymer before standing
- PDI 2 is the molecular weight distribution of the polymer after standing at 25° C. for 90 days.
- the Mooney viscosity (MV 1 , (ML1+4, @100°C) MU) was measured using a Rotor Speed 2 ⁇ 0.02 rpm, Large Rotor at 100°C using MV-2000 (ALPHA Technologies), and used at this time.
- the resulting sample was left at room temperature (23 ⁇ 3°C) for 30 minutes or more, and then 27 ⁇ 3 g was collected, filled in the die cavity, and the platen was operated to measure for 4 minutes.
- Mooney viscosity change rate (%) was measured by the above-described method after leaving each polymer at 25° C. for 90 days to obtain a Mooney viscosity (MV 2 ), and was calculated through Equation 2 below.
- Mooney viscosity change rate (%) [
- MV 1 is the Mooney viscosity measured at 100°C of the polymer before standing
- MV 2 is the Mooney viscosity measured at 100°C after standing at 25°C for 90 days.
- Each modified styrene-butadiene copolymer of Examples and Comparative Examples was used as a raw material rubber, and was blended under the conditions shown in Table 3 below.
- the raw materials in Table 2 are each part by weight based on 100 parts by weight of the raw rubber.
- the rubber specimen is kneaded through the first stage kneading and the second stage kneading.
- first-stage kneading raw rubber, silica (filling agent), organosilane coupling agent (X50S, Evonik), process oil (TDAE oil), zinc agent (ZnO), stearic acid are used using a Banbari mixer attached with a temperature control device.
- TMQ(RD) (2,2,4-trimethyl-1,2-dihydroquinoline polymer)
- anti-aging agent (6PPD ((dimethylbutyl)-N-phenyl-phenylenediamine)
- wax Merocrystaline Wax
- the first blend sulfur, a rubber accelerator (DPG (diphenylguanidine)) and a vulcanization accelerator (CZ (N-cyclohexyl-2-benzothiazylsulfenamide)) were added to the kneader, and at a temperature of 100°C or less.
- the mixture was mixed to obtain a second blend, and then, 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 and the tensile stress at the time of 300% elongation (300% modulus) were measured. Specifically, tensile properties were measured at a rate of 50 cm/min at room temperature using a Universal Test Machin 4204 (Instron) 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 ⁇ 60°C) in Film Tension mode using a dynamic mechanical analyzer (GABO).
- GBO dynamic mechanical analyzer
- MV-2000 (ALPHA Technologies, Inc.) was used at 100°C with a Rotor Speed of 2 ⁇ 0.02 rpm, and a Large Rotor was used, and each of the primary formulations was left at room temperature (23 ⁇ 3°C) for 30 minutes or more, and then 27 ⁇ 3 g was collected, filled inside the die cavity, and measured for 4 minutes by operating the platen.
- Examples 1 to 3 are wet road surface resistance (tan ⁇ at 0°C), processability characteristics, 300% modulus and rolling resistance (tan ⁇ at 60°C) compared to Comparative Examples 1 to 5 ) All showed excellent effects.
- Examples 1 to 3 exhibited superior wet road surface resistance and workability characteristics equivalent to or higher compared to Comparative Examples 1 to 3, while 300% modulus was at least 7%, and rotational resistance was significantly at least 13%. It showed an improved effect.
- Examples 1 to 3 exhibited significantly improved effects of more than 5% respectively in 300% modulus, rotational resistance, and workability characteristics compared to Comparative Example 4, and workability characteristics compared to Comparative Example 5 were significantly synergistic with 30% or more. Indicated.
- Comparative Examples 1 to 3 and 5 are polymers that contain a functional group derived from an aminoalkoxysilane modifier, but do not satisfy the conditions of the rate of change of molecular weight distribution presented in the present invention
- Comparative Example 4 is a molecular weight suggested by the present invention. It is a polymer that satisfies the distribution change rate but does not contain a functional group derived from an aminoalkoxysilane modifier.
- Comparative Example 5 uses the macromonomer presented in the present invention as a modified polymerization initiator, and after the modification reaction, the macromonomer is added and reacted. It is a polymer prepared in the same manner as in Example 1, except that it was not performed.
- the modified conjugated diene-based polymer according to an embodiment of the present invention contains a functional group derived from an aminoalkoxysilane-based modifier in the polymer, and at the same time satisfies the conditions of a molecular weight distribution change rate of 10% or less, thereby exhibiting tensile properties, viscoelastic properties, and processability properties. It was confirmed that there is an excellent effect in a good balance.
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Abstract
Description
Claims (11)
- 공액디엔계 단량체 유래 반복단위; 및 아미노알콕시실란계 변성제 유래 작용기를 포함하고;하기 수학식 1로 계산되는 분자량 분포 변화율이 10% 이하인 변성 공액디엔계 중합체:[수학식 1]분자량 분포 증가율(%)=[|(PDI2-PDI1)|/PDI1]×100상기 수학식 1에서,PDI1은 방치 전 중합체의 분자량 분포이고, PDI2는 25℃에서 90일 동안 방치 후 중합체의 분자량 분포이다.
- 제1항에 있어서,하기 수학식 2로 계산되는 무니점도 변화율이 10% 이하인 것인 변성 공액디엔계 중합체:[수학식 2]무니점도 변화율(%)=[|(MV2-MV1)|/MV1]×100상기 수학식 2에서,MV1은 방치 전 중합체의 100℃에서 측정한 무니점도이고, MV2는 25℃에서 90일 동안 방치 후 중합체의 100℃에서 측정한 무니점도이다.
- 제1항에 있어서,마크로모노머 유래 단위를 더 포함하고,상기 마크로모노머는 N-관능기 함유 단량체 유래 반복단위를 포함하는 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,공액디엔계 단량체 유래 반복단위를 포함하는 제1사슬; 마크로모노머 유래 단위를 포함하는 제2사슬; 및 아미노알콕시실란계 변성제 유래 단위를 포함하고,상기 마크로모노머는 N-관능기 함유 단량체 유래 반복단위를 포함하는 것인 변성 공액디엔계 중합체.
- 제3항 또는 제4항에 있어서,상기 마크로모노머는 공액디엔계 단량체 유래 반복단위를 더 포함하는 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,Si 원자를 포함하고,상기 Si 원자의 함량이 중합체 전체 중량을 기준으로 100 ppm 이상인 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,N 원자를 포함하고,상기 N 원자의 함량이 중합체 전체 중량을 기준으로 70 ppm 이상인 것인 변성 공액디엔계 중합체.
- 제1항에 있어서,상기 아미노알콕시실란계 변성제는 하기 화학식 1 내지 화학식 3으로 표시되는 화합물 중에서 선택되는 1종 이상인 것인 변성 공액디엔계 중합체:[화학식 1]상기 화학식 1에서,A1 및 A2는 서로 독립적으로 탄소수 1 내지 20의 알킬렌기이고,R17 내지 R20은 서로 독립적으로 탄소수 1 내지 20의 알킬기이고,L1 내지 L4는 서로 독립적으로 탄소수 1 내지 10의 알킬기로 치환된 1치환, 2치환 또는 3치환의 알킬실릴기, 또는 탄소수 1 내지 20의 알킬기이며,X는 산소 원자이거나, 또는 탄소수 1 내지 20의 알킬렌기이고,[화학식 2]상기 화학식 2에서,R1은 단일 결합, 또는 탄소수 1 내지 10의 알킬렌기이고,R2 및 R3은 각각 독립적으로 탄소수 1 내지 10의 알킬기이고,R4는 수소, 에폭시기, 탄소수 1 내지 10의 알킬기, 탄소수 2 내지 10의 알릴기, 탄소수 1 내지 10의 알킬기로 치환된 1치환, 2치환 또는 3치환의 알킬실릴기, 또는 탄소수 2 내지 10의 헤테로 고리기이고,R21은 단일 결합, 탄소수 1 내지 10의 알킬렌기, 또는 -[R42O]j-이고, 여기에서 R42는 탄소수 1 내지 10의 알킬렌기이고, j는 1 내지 30에서 선택된 정수이고,a 및 m은 각각 독립적으로 1 내지 3에서 선택된 정수이며,n은 0 내지 2의 정수이고,[화학식 3]상기 화학식 3에서,R5, R6 및 R9는 각각 독립적으로 탄소수 1 내지 10의 알킬렌기이고,R7, R8, R10 및 R11은 각각 독립적으로 탄소수 1 내지 10의 알킬기이고,R12는 수소 또는 탄소수 1 내지 10의 알킬기이고,b 및 c는 각각 독립적으로 1, 2 또는 3이되, b+c≥4이며,
- 제1항에 있어서,방향족 비닐계 단량체 유래 반복단위를 더 포함하는 것인 변성 공액디엔계 중합체.
- 제1항의 변성 공액디엔계 중합체; 및 충진제를 포함하는 고무 조성물.
- 제10항에 있어서,상기 충진제는 실리카계 충진제 및 카본블랙계 충진제 중에서 선택된 1종 이상인 것인 고무 조성물.
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SG11202108200TA SG11202108200TA (en) | 2019-09-11 | 2020-09-11 | Modified conjugated diene-based polymer and rubber composition including the same |
JP2021539851A JP7337434B2 (ja) | 2019-09-11 | 2020-09-11 | 変性共役ジエン系重合体、およびそれを含むゴム組成物 |
CN202080009952.3A CN113302209B (zh) | 2019-09-11 | 2020-09-11 | 改性共轭二烯类聚合物和包含该改性共轭二烯类聚合物的橡胶组合物 |
US17/425,550 US20220195074A1 (en) | 2019-09-11 | 2020-09-11 | Modified Conjugated Diene-Based Polymer and Rubber Composition Including the Same |
BR112021015659-3A BR112021015659A2 (pt) | 2019-09-11 | 2020-09-11 | Polímero à base de dieno conjugado modificado e composição de borracha incluindo o mesmo |
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