METHOD FOR PREPARING CONJUGATED DIENE COPOLYMER CONJUGATED DIENE COPOLYMER BY PREPARED THE METHOD AND RUBBER COMPOSITION COMPRISING THE COPOLYMER

摘要

The present invention relates to a method for preparing a conjugated diene-based copolymer, and more specifically, the step of emulsifying and polymerizing (S10) comprising α-methylstyrene monomer, conjugated diene-based monomer, and hydroxy alkyl (meth)acrylate monomer. Containing, the α- methyl styrene monomer and the conjugated diene-based monomer are batch-injected at a time when the polymerization conversion rate of the emulsion polymerization is 0%, and the hydroxy alkyl (meth)acrylate monomer is 0% to the polymerization conversion rate of the emulsion polymerization. It is divided into two or more times at the time of 80%, and based on the total content of the monomer, the α-methylstyrene monomer is 10% to 50% by weight, the conjugated diene-based monomer is 49% to 89% by weight, and the hydroxy The alkyl (meth)acrylate monomer provides a method for preparing a conjugated diene-based copolymer that is added at 0.1% to 5% by weight, a conjugated diene-based copolymer prepared therefrom, and a rubber composition comprising the same.