Patent ID: 6251983
Filing Date: 2001-06-26
Classification: B60C,C01P,C08K,C09C,Y02T

Abstract:
Inversion carbon black having the following properties:a particle size distribution curve with an absolute slope of less than 400,000 nm.sup.3, theabsolute slope AS being determined from measured aggregate size distribution using the following formula: ##EQU2##wherein H.sub.i denotes the frequency at which the particle diameter X.sub.i occurs and x is the particle diameter of the aggregate, whose weight corresponds to the average particle weight of the carbon black aggregate, the summation being carried out in the range of 1 to 3000 nm in equidistant spacing for each nanometer; andwhen incorporated in an SSBR/BR rubber compound, the carbon black results in the rubber compound satisfying the relation tan .delta..sub.0 / tan .delta..sub.60 >2.76-6.7.times.10.sup.-3.times.CTAB, and results in the rubber compound having a tan .delta..sub.60 value which is lower than that of a rubber compound incorporating an equivalent amount of a conventional ASTM carbon black having the same CTAB surface area and 24M4-DBP absorption value.