Patent ID: 11884760
Assignee: ASAHI KASEL KABUSHIKI KAISHA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The production method for the branched conjugated diene-based polymer according to claim 1, wherein the coupling agent is, in the reaction step, a silane sulfide compound represented by the following formula (3):

(R1O)x(R2)ySi—R3—S—SiR43  (3)

wherein Si represents a silicon atom, O represents an oxygen atom, and S represents a sulfur atom;
x represents an integer of 1 to 3, y represents 0, or an integer of 1 to 2, and x+y is 3; and
R1, R2, and R4 may be the same or different, and represent an alkyl group having 1 to 16 carbon atoms, and R3 represents an aryl group having 6 to 16 carbon atoms, an alkylene group having 1 to 16 carbon atoms, or an alkyl chain having 1 to 16 carbon atoms.