Products of the reaction of N-monochlorosufonamides with isobutylene-styrene oligomers as additives for lubricating oils

Abstract

The reaction between N-monochlorosufonamides and a low-molecular-mass isobutylene-styrene cooligomer in the presence of inorganic acids was studied. It was found that regardless of the substituent (hydrogen or alkyl radical) on the sulfonamide nitrogen, the reactivity of N-monochlorosulfonamides is very high and results in the formation of N-β-chloropolyalkylarylsulfonamides in a reaction with a polymer. The high yield of the product of the N-chlorosulfonamide reaction with the polymers is reached within 3–4 h at 50°C. It was revealed that the addition of N-ethyl-N-chloroarylsulfonamide to unsaturated groups proceeds easier as compared to other N-monochloroamines, and the yield of the desired product reaches 90%. The products exhibit high anticorrosive and tribological behavior, and, when added in a 5% concentration to oil, satisfactory detergent properties.