Synthesis and performance evaluation of a new type of adducts of polyisobutyl phenol-epoxy chloropropane-polyamine as gasoline detergents

摘要

Gasoline detergent is an indispensable component for modern port fuel injected gasoline engine utilized to control engine deposit formation eliminating their adverse impacts on engine working performances and exhaust emissions (1,2). There have developed several types of detergents put extensively into practical application named as polyisobutyl amine (PIBA), polyisobutyl succinimide, Mannich bases and polyether amine (PEA) to suppress IVD, PFID or CCD accumulation. At present, researches of high efficient and multifunctional detergents are encouraged worldwide to inhibit IVD, PFID and CCD build-up simultaneously. It is found that amino group in detergent molecule could significantly promote CCD growth, a glaring example being that PIBA detergent possesses excellent performance for controlling IVD and PFID while significantly increases CCD formation in the mean time due to its high molecular thermal stability making amino group uneasy to break away and having it participate in and promote CCD formation (3,4). In current research, a new type of adducts of polyisobutyl phenol-epoxy chloropropane-polyamine namely 2-hydroxyl-3-parapolyisobutylphenoxy propyl amines were developed. Studies in this paper showed that the new compounds have excellent abilities to inhibit IVD and PFID formation, and possess relatively low molecular thermal stability and hence low CCD forming propensities.