FINELY PULVERIZED PETROLEUM COKE, FIRED FINELY PULVERIZED PETROLEUM COKE, FILLER FOR RUBBER COMPOSITION, AND RUBBER COMPOSITION

摘要

Provided are finely pulverized petroleum coke and fired finely pulverized petroleum coke that can be suitably used as a filler for rubber compositions; also provided are a filler for rubber compositions and a rubber composition that effectively improve durability, particularly when used in tire parts, while suppressing an increase in cost. Finely pulverized petroleum coke having an average particle size (D50) of from more than 0 μm to 50 μm or less, fired finely pulverized petroleum coke having an average particle size (D50) of from more than 0 μm to 50 μm or less that is obtained by firing and pulverizing petroleum coke, filler for rubber compositions obtained by pulverizing petroleum coke, and a rubber composition obtained by combining this finely pulverized petroleum coke or fired finely pulverized petroleum coke.