Rubber composition comprising furnace carbon black
AssigneeBridgestone Tire Company Limited
InventorsYosuke Okado, Masanori Kawamura, Takashi Tomioka
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Abstract
A rubber composition having a good reinforcing property and a remarkably improved resistance against heat build-up is disclosed, which comprises 100 parts by weight of at least one of natural rubber and synthetic rubber and 20-200 parts by weight of furnace carbon black having a specific surface area of 85-95 m.sup.2 /g, a dibutyl phthalate absorption value of 100-110 ml/100 g and a tinting strength of 95-105.
Claims3
A rubber composition comprising 100 parts by weight of at least one of natural rubber and synthetic rubber and 20-200 parts by weight of carbon black, said carbon black being furnace carbon black having a specific surface area (N.sub.2 SA) of 85-95 m.sup.2 /g measured by the nitrogen adsorption method, a dibutyl phthalate adsorption value (24M4 DBP) of 100-110 ml/100 g, a tinting strength (TINT) of 95-105 and wherein said furnace carbon black has such a particle size that aggregates obtained from the carbon black by centrifugal sedimentation have a size distribution curve having a half value width (.DELTA.D.sub.50 (Dst)) of at least 180 m.mu..
Dependencies are inferred from the claim text.