Rubber composition

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...

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524495, 423445, C08K 304

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active

052311295

ABSTRACT:
A rubber composition comprising 100 parts by weight of a rubber ingredient compounded with 35-100 parts of a carbon black, said carbon black having a nitrogen adsorption specific surface area (N.sub.2 SA) of 60-160 m.sup.2 g and a dibutyl phthalate adsorption number (DBP) of 90-150 ml/100 g, and the intraaggregate mode diameter (Dp mode diameter) of the carbon black satisfying the following formula:
Dp mode diameter .gtoreq.75.2.times.(DBP/N.sub.2 SA)+8.0 wherein the Dp mode diameter refers to a mode diameter at the maximum frequency in the pore diameter distribution of carbon black particles measured by means of a differential scanning calorimeter (DSC).

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patent: 4914147 (1990-04-01), Mouri et al.
patent: 5093407 (1992-03-01), Komai et al.
patent: 5124396 (1992-06-01), Branan, Jr. et al.

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