- Patent Title: Production method for branched conjugated diene-based polymer, production method for rubber composition, production method for tire, branched conjugated diene-based polymer, and branched conjugated diene-based polymer composition
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Application No.: US17116014Application Date: 2020-12-09
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Publication No.: US11884760B2Publication Date: 2024-01-30
- Inventor: Shinichi Sekikawa , Kenta Hisamura , Syogo Sumitani , Yoshifumi Araki
- Applicant: Asahi Kasei Kabushiki Kaisha
- Applicant Address: JP Tokyo
- Assignee: Asahi Kasei Kabushiki Kaisha
- Current Assignee: Asahi Kasei Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Morgan, Lewis & Bockius LLP
- Priority: JP 19224387 2019.12.12 JP 20047421 2020.03.18 JP 20202847 2020.12.07
- Main IPC: C08F236/06
- IPC: C08F236/06 ; C08K3/04 ; C08K3/36 ; C08J3/20
Abstract:
A production method for a branched conjugated diene-based polymer, comprising:
a polymerizing step of obtaining a conjugated diene-based polymer having an active end by polymerizing or copolymerizing a conjugated diene compound, or a conjugated diene compound and an aromatic vinyl compound with an alkali metal compound or an alkaline earth metal compound used as a polymerization initiator; and
a branching step of introducing a branch structure by reacting a styrene derivative as a branching agent with the active end of the conjugated diene-based polymer.
a polymerizing step of obtaining a conjugated diene-based polymer having an active end by polymerizing or copolymerizing a conjugated diene compound, or a conjugated diene compound and an aromatic vinyl compound with an alkali metal compound or an alkaline earth metal compound used as a polymerization initiator; and
a branching step of introducing a branch structure by reacting a styrene derivative as a branching agent with the active end of the conjugated diene-based polymer.
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