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Problems solved by technology
[0012] However, the problem with the modified initiator prepared in this way is that polar additives should be further introduced during SSBR polymerization
Method used
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preparation example Construction
[0228] The method of preparing a polymerization initiator according to the present invention may further include a step of reacting the prepared modified initiator and a conjugated diene compound after the step of preparing a modified initiator.
[0229] In one example, as the conjugated diene compound, 1,3-butadiene (BD), isoprene (IP), 2,3-dimethyl-1,3-butadiene, 1 , one or more of 3-pentadiene, 3-methyl-1,3-pentadiene, 1,3-heptadiene and 1,3-hexadiene, specifically, 1, 3-butadiene or isoprene. The conjugated diene compound can be reacted in the form of a solution of the conjugated diene compound including a solvent. As the solvent, any solvent may be used as long as it is generally available. Specifically, cyclohexane, hexane, tetrahydrofuran, diethyl ether, and the like can be used, more specifically, cyclohexane can be used.
[0230] For example, the concentration of the conjugated diene compound solution may be 1 to 100 wt%, and the balance may be a solvent. Specific...
preparation Embodiment 1
[0293] Prepare two vacuum-dried stainless steel pressure vessels. 2477g hexane, 15g 2-vinyl-N,N-dimethylbenzylamine, 5g 3-vinyl-N,N-dimethylbenzylamine, 80g 4-vinyl-N,N-dimethyl Benzylamine and 72 g of tetramethylethylenediamine were placed in the first pressure vessel to prepare a vinyl-N,N-dimethylbenzylamine solution. Then, 171 g of 2.5M liquid n-butyllithium and 2478 g of hexane were placed in another pressure vessel to prepare an n-butyllithium solution.
[0294] The pressure of each pressure vessel was maintained at 4 bar. Then, the vinyl-N,N-dimethylbenzylamine solution was injected into the first inflow line at 10.0 g / min, and the n-butyllithium solution was injected into the second inflow line at 10.0 g / min using a mass flow meter, wherein The individual streams meet at a T-junction or Y-channel. At this point, the width of the tube or channel is 1 / 8 inch, the temperature is maintained at -30°C, and the internal pressure is maintained at 2 bar by use of a back pres...
preparation Embodiment 2
[0296] A polymerization initiator composition was prepared in the same manner as in Preparation Example 1, except that 2495 g of hexane and 54 g of tetramethylethylenediamine were added to the first pressure vessel.
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Abstract
The present invention relates to a polymerization initiator composition, a preparation method therefor, and a method for preparing a polymer using the same. The polymerization initiator composition ofthe present invention can prevent instability, inactivity, and deteriorations in SSBR properties of a polymerization initiator, minimize byproducts and unreacted materials, and significantly improveconversion rates, by comprising isomers of the polymerization initiator. Furthermore, a polar additive is already added in the preparation of the polymerization initiator, and thus a polar additive does not need to be separately added in the polymerization of polymers and the hydrophobic SSBR and hydrophilic silica can be effectively dispersed.
Description
technical field [0001] The present invention relates to a polymerization initiator composition, a preparation method thereof and a method for preparing polymers using the polymerization initiator composition. [0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2017-0001272 filed on January 4, 2017, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0003] Since efficient, environmentally friendly, and high-performance tire performance is required to reduce CO2 emissions, improve fuel efficiency, etc., tire materials that meet these demands are being actively developed. In particular, unlike emulsion polymerization, it is easy to change the structure due to the bonding or modification of the chain end, and to reduce the movement of the chain end, and to increase the bonding force with carbon black, the styrene-butadiene polymer obtained by solution polymerization ( Hereinafter ref...
Claims
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