Invention Grant
- Patent Title: Method for manufacturing conjugated diene polymer, conjugated diene polymer, rubber composition, and tire
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Application No.: US15502882Application Date: 2015-07-02
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Publication No.: US10239964B2Publication Date: 2019-03-26
- Inventor: Yusuke Yamagata , Narukuni Hirata , Tomoe Tanabe , Shojiro Kaita , Madoka Kimura
- Applicant: BRIDGESTONE CORPORATION
- Applicant Address: JP Chuo-ku, Tokyo
- Assignee: BRIDGESTONE CORPORATION
- Current Assignee: BRIDGESTONE CORPORATION
- Current Assignee Address: JP Chuo-ku, Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2014-167727 20140820; JP2014-167777 20140820; JP2014-167782 20140820
- International Application: PCT/JP2015/003349 WO 20150702
- International Announcement: WO2016/027402 WO 20160225
- Main IPC: C08F4/54
- IPC: C08F4/54 ; C08F236/06 ; C08F236/08 ; B60C1/00 ; C08F136/04 ; C08L9/00 ; C08F136/06 ; C08F136/08
Abstract:
A method for manufacturing a conjugated diene polymer that can increase the robustness of a polymerization reaction system is provided. Also, a conjugated diene polymer, with a high cis-1,4-bond content, that is manufactured by this method for manufacturing is provided. A method for manufacturing a conjugated diene polymer includes polymerizing a conjugated diene monomer using a polymerization catalyst composition including a rare earth element compound and a compound having a cyclopentadiene skeleton, and a conjugated diene polymer manufactured with this method for manufacturing has a cis-1,4-bond content of 95% or greater.
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