RUBBER COMPOSITION FOR TIRE TREADS AND PNEUMATIC TIRE
申请人:THE YOKOHAMA RUBBER CO., LTD.
公开号:US20180051163A1
公开(公告)日:2018-02-22
A rubber composition for tire treads contains an inorganic filler containing silica and a diene rubber containing a carboxy-modified polymer. The content of the inorganic filler is from 70 to 170 parts by mass per 100 parts by mass of the diene rubber. The content of the silica is from 70 to 160 parts by mass per 100 parts by mass of the diene rubber. The carboxy-modified polymer is obtained by modifying a styrene-butadiene rubber (A) with a nitrone compound (B) having a carboxy group, and the content of the carboxy-modified polymer in the diene rubber is from 10 to 100 mass %. The content of styrene units in the styrene-butadiene rubber (A) is not less than 36 mass %. The degree of modification of the carboxy-modified polymer is from 0.02 to 4.0 mol %.
RUBBER COMPOSITION FOR TIRE TREADS, AND PNEUMATIC TIRE
申请人:THE YOKOHAMA RUBBER CO., LTD.
公开号:US20180079834A1
公开(公告)日:2018-03-22
The present invention provides a rubber composition for tire treads, the rubber composition achieving high rubber hardness and 300% modulus at high temperatures, and excellent dry grip properties when formed into a tire, along with a pneumatic tire obtainable by using the same. The rubber composition for tire treads of the present invention contains carbon black and a diene rubber including a carboxy-modified polymer. The carbon black content is from 80 to 150 parts by mass per 100 parts by mass of the diene rubber. The carboxy-modified polymer is obtained by modifying styrene-butadiene rubber (A) with a nitrone compound having carboxy group (B), and the content of the carboxy-modified polymer in the diene rubber is from 10 to 100 mass %. The content of styrene units in styrene-butadiene rubber (A) is at least 36 mass %. The degree of modification of the carboxy-modified polymer is from 0.02 to 4.0 mol %.
10.1039/b0071641
作者:Heancy, Frances
DOI:10.1039/b0071641
日期:——
Synthesis of Some Novel Class of Bis(isoxazoline) and Bis(aziridine) Derivatives
Synthesis of some new bis(isoxazoline) derivatives has been described from terepthaldehyde derived bis(nitrones) using microwave irradiation via 1,3‐dipolar cycloaddition reaction. Bis(isoxazoline) derivatives in turn successfully converted into new bis(aziridine) derivatives via Baldwin rearrangement. Simple reaction methodology, non involvement of catalysts, and good to excellent yields are the important