CONJUGATED DIENE POLYMER, METHOD FOR PREPARING THEREOF AND RUBBER-MODIFIED VINYL POLYMER COMPRISING

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PURPOSE : A manufacturing method of a conjugated diene polymer is provided to able to control reaction heat without using solvent, and not to have processes like direct distillation, etc, thereby capable of reducing energy and CO2 generation.CONSTITUTION : A manufacturing method of a conjugated diene polymer comprises a step of semi-bulk polymerizing a monomer mixture consisting of 90-97 weight%% of a conjugated diene based monomer, and 3-10 weight%% of a styrene based monomer under the presence of a rare earth elements based catalyst. The conjugated diene based monomer is butadiene, isoprene, or a combination thereof. The conjugated diene polymer is inserted in gas phase. The rare earth catalyst is one or more kinds selected from Nd(acac)3, NdCl3, and cobalt Co(acac)2.COPYRIGHT KIPO 2012