Patent ID: 7232480
Filing Date: 2007-06-19
Classification: B82Y,C01P,C09C,C09D,Y10T

Abstract:
1. A modified carbon black obtained by carrying out oxidation treatment on a carbon black having a primary particle diameter of 11 to 18 nm, a BET specific surface area of at least 180 m 2 /g, a DBP oil absorption of at least 180 mL/100 g, and a value of the BET specific surface area (m 2 /g) divided by the DBP oil absorption (mL/100 g) of 0.75 to 1.3, the modified carbon black characterized in that at least lactone groups and carboxyl groups are introduced onto the surface thereof, and the ratio of the mean particle diameter to the primary particle diameter is at least 8.5.