Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1998-11-05
2000-10-03
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524495, 524575, 5253329, 525342, C08K 304, C08K 336, C08L 2510, C08C 1900
Patent
active
061274720
ABSTRACT:
A rubber composition exhibiting excellent low rolling resistance, high wet skid properties, and superior wear resistance, and suitably used as a vulcanized rubber for tire tread. The rubber composition comprises a styrene-butadiene copolymer previously extended using an extender oil, in an amount from 30 to 100 wt % of the total rubber components, and an extender oil in an amount from 6 to 50 parts by weight for 100 parts by weight of the total rubber components, of which 20 to 50 parts by weight of the extender oil for 100 parts by weight of styrene-butadiene copolymer is used to previously extend the styrene-butadiene copolymer. The styrene-butadiene copolymer has a styrene content from 5 to 45 wt %, 20 to 80% of a microstructure 1,2-bond of butadiene portion, a glass transition temperature from -55.degree. C. to -20.degree. C., and 40 wt % or more of a single styrene bond and 10 wt % or less of long styrene chain which contains 8 or more styrene molecules, among the total styrene bonds.
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Akema Hiroshi
Kobayashi Naokazu
Tadaki Toshihiro
Tsutsumi Fumio
JSR Corporation
Yoon Tae
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