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New Generation Low Hysteresis Carbon Black for Tire Tread Compounds
N.N.Kunti, S.P.Majumdar, B.K.Roy*, V.Taneja
Phillips Carbon Black Limited, R&D Centre, Palej - 392220, Gujarat, India
Abstract
Steady increase in fuel price is a concern to all, as tire consumes 20-25% of total fuel burn by the vehicle-hence it is a vital area of improvement. It has been well established that there is a good correlation between the rolling resistance of tires and the hysteresis of the tread compound, characterized by the loss factor, tanδ at high temperature. Carbon black has important role in governing rolling resistance of tires, thus consumption of fuel. In this paper, a new generation, low hysteresis carbon black, named as PTB 210, has been introduced with an aim for a suitable substitute of commonly used 200 & 100 series black in tire tread formulation. This new generation black is characterized by higher OAN / COAN and broad aggregate size distribution with protected surface, thereby lowering propensity for network formation, hysteresis and consequently lowering heat buildup & rolling resistance of the tread compound with improved wear resistance. In the present study, PTB 210 has been tested out in three different polymer systems, viz. NR, blends of NR- BR and SBR-BR to investigate its influence on different tread compound performances. In all the cases, reduction in rolling resistance and heat generation as compared to commonly used 200 & 100 series carbon black based compounds has been observed without compromising other properties.
Key Word : Carbon Black, Tread, Hysteresis, Heat Build Up, Rolling Resistance
*Speaker