Modified copolymer of conjugated diene and vinyl aromatic hydrocarbon and polymerization method thereof

摘要

Provided is a polymerization method of a modified copolymer of conjugated diene and vinyl aromatic hydrocarbon. A multi-functional vinyl benzene-based compound is reacted with an organic alkali metal compound to form a star shaped compound with multiple active sites. A conjugated diene monomer, a vinyl aromatic hydrocarbon monomer, and the star shaped compound with multiple active sites are reacted with each other to form a copolymer of conjugated diene and vinyl aromatic hydrocarbon. The copolymer of conjugated diene and vinyl aromatic hydrocarbon is then reacted with a modifier to form the modified copolymer of conjugated diene and vinyl aromatic hydrocarbon.;The modifier is represented by formula 1,;wherein R1 is a C2-C4 alkylene group; R2 is a group at least consisting of a C2-C4 alkylene group and a C1-C3 alkoxy group; m is an integer of 5 to 30; and n is an integer of 5 to 35.

主权项

1. A polymerization method of a modified copolymer of conjugated diene and vinyl aromatic hydrocarbon, comprising:
reacting a multi-functional vinyl benzene-based compound with an organic alkali metal compound to form a star-shaped compound with multiple active sites; reacting a conjugated diene monomer, a vinyl aromatic hydrocarbon monomer, and the star-shaped compound with multiple active sites to form a copolymer of conjugated diene and vinyl aromatic hydrocarbon, wherein a weight ratio of the conjugated diene monomer to the vinyl aromatic hydrocarbon monomer is 2:1 to 6:1; and reacting the copolymer of conjugated diene and vinyl aromatic hydrocarbon with a modifier to form a modified copolymer of conjugated diene and vinyl aromatic hydrocarbon, wherein the modifier is a compound represented by formula 1, wherein R1 is a C2-C4 alkylene group; R2 comprises a C2-C4 alkylene group and a C1-C3 alkoxy group; m is an integer of 5 to 30; and n is an integer of 5 to 35, and wherein based on 100 parts by weight of a total amount of the conjugated diene monomer and the vinyl aromatic hydrocarbon monomer, an amount of the multi-functional vinyl benzene-based compound is 0.01 to 0.1 part by weight, an amount of the organic alkali metal compound is 0.001 to 0.1 part by weight, and an amount of the modifier is 0.01 to 0.8 part by weight.