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RUBBER COMPOSITION CONTAINING MODIFIED POLYBUTADIENE RUBBER AND TIRE 发明申请

2023-03-20 3830 1676K 0

专利信息

申请日期 2025-07-12 申请号 US12161015
公开(公告)号 US20100160530A1 公开(公告)日 2010-06-24
公开国别 US 申请人省市代码 全国
申请人 Junko Kurazumi; Kouji Masaki
简介 A rubber composition comprises 10 to 70 parts by mass of carbon black having 20 to 100 m2/g of the specific surface area by nitrogen adsorption per 100 parts by mass of a rubber component comprising 20 to 80 parts by mass of a modified polybutadiene rubber and 80 to 20 parts by mass of natural rubber and/or at least one other diene-based synthetic rubber, wherein the modified polybutadiene is obtained by polymerizing 1, 3-butadiene in an organic solvent using a compound having a rare earth element of the lanthanoid series, followed by modifying the obtained polybutadiene, and has a content of the cis-1, 4-bond of 92% or greater, a content of vinyl bond of 1.5% or smaller and a fraction of the modified chain end of 20% or greater; and a tire using the rubber composition for a sidewall. The rubber composition exhibits excellent low heat buildup property and resistance to fracture.


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