The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1995
Filed:
Apr. 01, 1993
Chiung-Huei Shieh, Lexington, MA (US);
William A Farr, London, CA;
Thomas E McElwain, Pampa, TX (US);
Roscoe W Taylor, Abbotsford, AU;
William J Patterson, North Andover, MA (US);
Glenn E Denstaedt, Wadsworth, OH (US);
Robert R Juengel, Roswell, GA (US);
Stephen G Laube, Duluth, GA (US);
Cabot Corporation, Boston, MA (US);
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.