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
1982-08-17
1984-02-21
Lieberman, Paul
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...
152209R, 152330R, 524434, 524526, 526340, C08K 304, C08L 906, B60C 1100
Patent
active
044330944
ABSTRACT:
A pneumatic tire comprising an improved tread is disclosed. The tread is composed of a rubber composition comprising 10-120 parts by weight of carbon black having an iodine adsorption number of not less than 36 mg/g and a dibutyl phthalate adsorption number of not less than 60 ml/100 g and 0.4-5 parts by weight of a vulcanizing agent based on 100 parts by weight of rubber content consisting of 40-100 parts by weight of styrene-butadiene copolymer rubber (hereinafter referred to as SBR-A) and 0-60 parts by weight of at least one diene rubber other than SBR-A; said SBR-A having a content of bound styrene (S) of 10-30 wt % and a content of 1,2-bond in butadiene portion (V) of 40-70 wt %, which are within a range of 65.ltoreq.1.7S+V.ltoreq.100, and satisfying that an amount of styrene sequence consisting of not less than 11 styrene monomer units is not more than 10 wt % of the content of bound styrene and an amount of styrene sequence consisting of not more than 5 styrene monomer units is not less than 80 wt % of the content of bound styrene.
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patent: 4111867 (1978-09-01), Komuro et al.
patent: 4334567 (1982-06-01), Bond
patent: 4367325 (1983-01-01), Takeuchi et al.
Derwent Abst. 56188e/27 (J57087407) 5-82.
Derwent Abst. 26773e/14 (EP48619) 3-82.
Derwent Abst. 26772e/14 (EP48618) 3-82.
Derwent Abst. 55307e/27 (EP54911) 6-82.
Ikegami Mikihiko
Ogawa Masaki
Bridgestone Tire Company Limited
Lieberman Paul
Lilling Herbert J.
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