| abstract |
(57) [Summary] [Object] To provide a surface-modified carbon black which can always obtain uniform dispersion stability regardless of an acidic compounding system and a basic compounding system, and a method for producing the same. [Structure] A surface-modified carbon black having a surface functional group composition in which a hydroxyl group having a molar ratio to a quinone group of at least 10 or more is introduced on the surface of carbon black. In the production method, carbon black is treated with an oxidizing agent or a sulfur-containing oxidizing agent to sulfonate the surface, and the filtered and dried residual carbon black is melt-reacted with a basic melting agent and cooled. Then, it is neutralized with an acid, washed with water and dried. |