PROCESS FOR THE PRODUCTION OF OXIDISED POLYISOBUTENES, THEIR USE IN PRODUCTION OF ADDITIVES AND USE OF ADDITIVES

摘要

Oxidised polyisobutenes, that is polyisobutenes containing ketonic and carboxylic acid carbonyl groups, are produced by passing through a column of the polyisobutene maintained at a temperature in the range from 140 to 200 DEG C and at atmospheric or elevated total pressure a molecular oxygen-containing gaseous oxidant at a gas flow rate greater than 10 litres cm<-><2>h<-><1> measured at the operating pressure. The oxidised polyisobutenes can be reacted for example with an aliphatic polyamine to produce a lubricating oil additive or with an aliphatic polyamine and formaldehyde to produce a fuels additive.