Modified conjugated diene-based polymer, method for preparing same, and rubber composition comprising same
A technology of rubber composition and conjugated diene, which is applied in transportation and packaging, tire parts, special tires, etc., can solve the problems of processing performance deterioration, wide molecular weight distribution, poor physical properties, etc., and achieve improved tanδ value, excellent Processability, effect of improving tensile properties and viscoelastic properties
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[0135] A method for preparing a modified conjugated diene polymer according to one embodiment of the present invention includes: making a conjugated diene monomer, or an aromatic vinyl monomer, in a hydrocarbon solvent in the presence of a polymerization initiator polymerizing with a conjugated diene-based monomer to prepare a living polymer (S1); and reacting or coupling the living polymer prepared in step (S1) with a first modifier and a second modifier (S2), Wherein, the first modifier is an aminoalkoxysilane modifier, and the second modifier is a heterocyclic group-containing silane modifier.
[0136] The aminoalkoxysilane-based modifier and the heterocyclic group-containing silane-based modifier are the same as described above.
[0137] The hydrocarbon solvent is not particularly limited, but may be, for example, one or more selected from n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene and xylene .
[0138] In addition, the polymerization initia...
Embodiment 1
[0178] In the first reactor in the continuous reactor that two reactors are connected in series, inject the styrene solution wherein 60% by weight of styrene is dissolved in n-hexane with the rate of 258.3g / h, with the rate of 1.41kg / h Inject a 1,3-butadiene solution in which 60% by weight of 1,3-butadiene is dissolved in n-hexane at a rate of 4.68 kg / h and inject 2 at a rate of 11.5 g / h. A solution in which 2,2-(di-2(tetrahydrofuryl)propane) by weight was dissolved in n-hexane as a polar additive, and 2% by weight of n-butyllithium dissolved in n-hexane was injected at a rate of 21.0g / h n-Butyllithium solution in alkanes. In this case, the temperature of the first reactor was maintained at 65° C., and at the point of time when the polymerization conversion reached 95%, the polymerization reactant was transferred from the first reactor to the second reactor through the transfer pipe.
[0179] The polymerized reactant is transported from the first reactor to the second reactor...
Embodiment 2
[0182] Except in Example 1, as a modifier, 4% by weight of N,N-dimethyl-3-(trimethoxysilyl)propane-1-amine was injected into it at a rate of 23.3g / h dissolved in solution in n-hexane, and inject 4% by weight of N-(3-(1H-imidazol-1-yl)propyl)-N,N-bis(3-(triethoxy) at a rate of 12.5g / h A modified conjugated diene-based polymer was prepared by carrying out the same method as in Example 1 except for a solution in which ylsilyl)propyl)amine was dissolved in n-hexane.
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