Terminal-modified conjugated diene-vinyl aromatic copolymer and method for manufacturing the same

摘要

The invention discloses a terminal-modified conjugated diene-vinyl aromatic copolymer and a method for manufacturing the same. The method comprises the following steps. An organic alkali metal initiator is added into a first mixture containing a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer to perform reaction to obtain a conjugated diene-vinyl aromatic copolymer with active terminal. The conjugated diene-vinyl aromatic copolymer with active terminal reacts with polysiloxane to obtain a terminal-modified conjugated diene-vinyl aromatic copolymer. The aforementioned polysiloxane is expressed as chemical formula (I):;
R1, R2, R3 and R5 independently are alkyl group with 1˜20 carbon atoms. R4 is selected from one of alkyl group, alkoxy group or hydroxyl group with 1˜5 carbon atoms, m is an integer of 2˜50, and n is an integer of 0˜50.

主权项

1. A method for manufacturing a terminal-modified conjugated diene-vinyl aromatic copolymer, comprising:
adding an organic alkali metal initiator into a first mixture containing a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer to obtain a conjugated diene-vinyl aromatic copolymer with active terminal, wherein the active terminal of the conjugated diene-vinyl aromatic copolymer is formed by the alkali metal initiator; and enabling the conjugated diene-vinyl aromatic copolymer with active terminal to react with a polysiloxane to obtain the terminal-modified conjugated diene-vinyl aromatic copolymer, wherein the polysiloxane is expressed as chemical formula (I) of: wherein, R1, R2, R3 and R5 are independently alkyl group with 1˜20 carbon atoms, R4 is selected from one of alkyl group, alkoxy group or hydroxyl group with 1˜5 carbon atoms, m is an integer of 2˜50, and n is an integer of 0˜50.