Development of Waste Tire Powder Filled Nitrile Butadiene Rubber Coating for Gasket Applications

This research proposes a new formulation for gasket coating application using nitrile butadiene rubber (NBR) and waste tire powder (WTP) as filler. WTP used to replace carbon black in the formulation. The experiment carried out with three phases, which are formulation optimization, foaming, curing parameter optimization, and determining the suitable coating methods. Various latex compounds containing different loading of WTP, sulphur and plasticizer was developed through solution mixing method. 10 phr plasticizer, 90 phr filler and 2 phr vulcanizing agent (P10-F90-V2) is the most most suitable formulation as it exhibit 16.01% mass oil absorption and 4.45% of maximum thickness changes which complied with requirement for gasket coating materials. Optimum foaming temperature of 70 °C and 30 min of curing time produced coating layers with smaller foam size and non-overcuring of NBR. The casting method is more suitable to produce coating layer with better oil resistance properties and performance as compared with rolling technique.