Carbon black for use in rubber blending

Abstract

Abstract PURPOSE:To enable high hardness to be imparted to rubber while retaining excellent resilience when blended with rubber, by using carbon black which has a high structure index and in which the state of aggregation and distribution of particles is within a specified selection range. CONSTITUTION:Carbon black for use in blending with rubber has selective characteristics such that nitrogen adsorption surface area (N2SA) is 34m<2>/g or below, dibutyl phthalate absorption (DBP) is 136ml/100g or above, and the mode size of aggregate distribution (Dst) obtd. by the centrifugal sedimentation method is below a value obtd. by the formula [0.60(DBP)-3.96(N2SA)+270]. This carbon black can be produced by using a large diameter-cylindrical reaction furnace having a drum-shaped throttle part capable of slowly converging and diverging and introducing atomized stream of the starting oil into high-temperature combustion gas obtd. from fuel oil and air or an appropriate oxidizing agent contg. oxygen in two steps.

Inventors

• 👤 Shinji Misono
• 👤 味曽野　伸司
• 👤 Hiroaki Suzuki
• 👤 弘明 鈴木

Bibliographic Details