Modified conjugated diene-based polymer
A conjugated diene, polymer technology, applied in the direction of rolling resistance optimization, can solve the problems of wide molecular weight distribution, deterioration of physical properties, deterioration of processing performance, etc., to achieve good tensile properties and viscoelastic properties, and improve viscoelastic properties. , the effect of excellent processing performance
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[0190] Preparation method of modified conjugated diene polymer
[0191] In addition, the present invention provides a preparation method of the modified conjugated diene polymer.
[0192] A method for preparing a modified conjugated diene polymer according to one embodiment of the present invention includes: making a conjugated diene monomer, or a conjugated diene monomer, in a hydrocarbon solvent in the presence of a modified initiator body and aromatic vinyl monomer polymerization, to prepare the active polymer (S1) introduced from the functional group of the modified initiator; and the active polymer prepared in the step (S1) and represented by the following formula The modifying agent reaction or coupling (S2), wherein, step (S1) is carried out continuously in two or more polymerization reactors, and the polymerization conversion in the first reactor in the polymerization reactor The rate can be 50% or less.
[0193] [Formula 1]
[0194]
[0195] In Formula 1, the ...
preparation Embodiment 1
[0239] (1) Preparation of compounds represented by formula 2aa-1
[0240] 10.11ml (91.46mmol) of N-methylaniline was dissolved in 284ml of methyl tert-butyl ether (MTBE), and the temperature was lowered to -20°C, then, 42.83ml (23% by weight, 105.18mmol) of n-butyllithium hexane solution. The reaction solution was stirred for about 180 minutes while slowly raising the temperature to room temperature. If the reaction solution turned light yellow, the temperature was lowered to -20°C again, and carbon dioxide was injected for about 20 minutes, followed by stirring for about one hour while raising the temperature to room temperature to prepare a reaction product in a white slurry state. The temperature was lowered to -20°C again, and 9.27ml (114.33mmol) of tetrahydrofuran (THF) and 62.4ml (18% by weight, 114.33mmol) of tert-butyl lithium pentane solution were continuously added to react to prepare dark yellow syrup feed reaction product. Then, after stirring at -10° C. for abo...
preparation Embodiment 2
[0250]Prepare two vacuum-dried 2 L stainless steel pressure vessels. Into the first pressure vessel, 516 g of cyclohexane, 217.6 g of a compound represented by the following formula 2bd, and 108 g of tetramethylethylenediamine were injected to prepare a first reaction solution. At the same time, 258 g of 2.5M n-butyllithium and 472 g of cyclohexane were injected into the second pressure vessel to prepare a second reaction solution. In this case, the molar ratio of the compound represented by Formula 2bd, n-butyllithium, and tetramethylethylenediamine was 1:1:1. The pressure of each pressure vessel was maintained at 4 bar, and the first reaction solution was injected through the first continuous channel at an injection rate of 1.0 g / min and the second reaction solution was injected through the second continuous channel at a rate of 1.0 g using a mass flow meter. / min injection rate into the continuous reactor. In this case, the temperature of the continuous reactor was mainta...
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