Catalyst for Conjugated Diene Polymerization, Conjugated Diene Polymer and Modified Conjugated Diene Polymer Produced Using the Same, Production Methods Thereof, Rubber Composition for Tire, and Rubber Composition for Rubber Belt
a technology of conjugated diene and polymerization, which is applied in the direction of catalyst activation/preparation, chemical/physical processes, tyre parts, etc., can solve the problems of low catalytic activity of 4 to 6, insufficient abrasion resistance of br, and inability to solve problems, etc., to achieve high activity, easy to handle, and high content of cis-1,4 structure
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example 1
[0202]An inside of an autoclave with an inner capacity of 1.5 L was substituted by nitrogen, and a solution including 245 ml of a cyclohexane solvent and 250 ml of butadiene was filled therein. Subsequently, 1.5 ml of a cyclohexane solution (2 mol / L) of triethyl aluminum (TEAL) was added thereto. Next, 1.35 ml of a toluene solution (0.003 mol / L) of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)gadolinium (Gd(dpm)3), followed by 2.0 ml of a toluene solution (0.004 mol / L) of triphenylcarbenium tetrakis(pentafluorophenyl)borate were added. After a polymerization was performed at 40° C. for 25 minutes, 3 ml of an ethanol solution containing an antioxidant was added to stop the polymerization. The inside pressure of the autoclave was released, and then ethanol was poured into the polymerization solution to recover polybutadiene. Then, the recovered polybutadiene was dried in vacuo at 80° C. for 3 hours. The polymerization results are shown in Table 1.
example 2
[0203]An inside of an autoclave with an inner capacity of 1.5 L was substituted by nitrogen, and a solution including 245 ml of a cyclohexane solvent and 250 ml of butadiene was filled therein. Subsequently, 0.5 ml of a toluene solution (2 mol / L) of triethyl aluminum (TEAL) was added thereto. Next, 0.8 ml of a toluene solution (0.005 mol / L) of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)gadolinium (Gd(dpm)3), followed by 2.0 ml of a toluene solution (0.004 mol / L) of triphenylcarbenium tetrakis(pentafluorophenyl)borate were added. After a polymerization was performed at 40° C. for 25 minutes, 3 ml of an ethanol solution containing an antioxidant was added to stop the polymerization. The inside pressure of the autoclave was released, and then ethanol was poured into the polymerization solution to recover polybutadiene. Then, the recovered polybutadiene was dried in vacuo at 80° C. for 3 hours. The polymerization results are shown in Table 1.
example 3
[0204]An inside of an autoclave with an inner capacity of 1.5 L was substituted by nitrogen, and a solution including 245 ml of a cyclohexane solvent and 250 ml of butadiene was filled therein. Subsequently, 1.5 ml of a cyclohexane solution (2 mol / L) of triethyl aluminum (TEAL) was added thereto. Next, 1.35 ml of a toluene solution (0.003 mol / L) of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)gadolinium (Gd(dpm)3), followed by 2.0 ml of a toluene solution (0.004 mol / L) of triphenylcarbenium tetrakis(pentafluorophenyl)borate were added. After a polymerization was performed at 40° C. for 15 minutes, 3 ml of an ethanol solution containing an antioxidant was added to stop the polymerization. The inside pressure of the autoclave was released, and then ethanol was poured into the polymerization solution to recover polybutadiene. Then, the recovered polybutadiene was dried in vacuo at 80° C. for 3 hours. The polymerization results are shown in Table 1.
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