Cabot Corporation

Thomas E McElwain

Jameel Menashi

Lang H Nguyen

Stephen G Laube

Chiung-Huei Shieh

Roscoe W Taylor

David D Smith

William A Farr

Glenn E Denstaedt

John F Nagel

William J Patterson

Samuel N Shields, Jr

Robert R Juengel

The present invention discloses coating compositions comprising a liquid vehicle and a carbon product having a t-area greater than or equal to 400 m /g. In addition, the present invention discloses coating compositions comprising a liquid vehicle and a modified carbon product having a t-area greater than or equal to 350 m /g, wherein the modified carbon product comprises a carbon product having attached at least one organic group.

Coating compositions comprising high t-area carbon products

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.

Carbon blacks

Growing community of inventors

Pampa, TX, United States of America

Thomas E McElwain