Carbon blacks

Details Carbon blacks Carbon blacks

1993-04-01

1995-02-28

Lewis, Michael

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...

4234491, 524492, C08K 304

Patent

active

053938216

ABSTRACT:
Carbon blacks having a CTAB of greater than, or equal to, 140 m.sup.2 /g; a CDBP of greater than or equal to 115 cc/100 g; a Tint value of greater than or equal to 135%; a .DELTA.D50 of less than or equal to 50 nm; a Dmode less than or equal to 72 nm; and an Occluded Volume Index greater than or equal to 1.30 that impart superior treadwear resistance and abrasion resistance to rubber compounds. Preferably, the carbon blacks of the present invention are further characterized by having a N.sub.2 SA greater than or equal to 150 m.sup.2 /g, and less than 180 m.sup.2 /g; and a DBP of greater than or equal to 140 cc/100 g. Also disclosed are rubber compounds containing the carbon blacks which exhibit increased abrasion resistance and treadwear resistance at normally utilized loading levels. Further disclosed are rubber compounds containing the carbon blacks which exhibit increased treadwear resistance/hysteresis ratios at loading levels lower than normally utilized in the compounding of tire compounds. All of the rubber compounds may additionally include silica in order to improve traction performance.

REFERENCES:
patent: 4871004 (1989-10-01), Brown et al.
patent: 4973463 (1990-11-01), Nakai
patent: 5110576 (1992-05-01), Soeda et al.
patent: 5230878 (1993-07-01), Nakai et al.

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