Properties&Application: Colourless to yellowish viscous liquid or elastic rubber like semi-solid (soft rubber like for low molecular weight, toughness and elasticity for high molecular weight). They are tasteless, odorless or slightly peculiar. The average molecular weight is 200000-87000000. Soluble in benzene and diisobutylene, miscible with polyvinyl acetate and wax, insoluble in water, alcohol and other polar solvents. It is used as raw material for production of ashless detergent dispersant, adhesive, insulating adhesive and other products, and also as lubricant additive.