... dust flying; Easy to storage; No caking Predispersed Antioxidant Masterbatch 4020 (6PPD) Chemical Name:N-(1,3-Dimethyl butyl)-N'-phenyl ... .5% ash content,% (750°C×2h)9.5±0.5% 4020 content , % 50% Performance:Excellent heat-resistant oxygen, ozone and anti ...