MODIFIED POLYALKENYL SUCCINIMIDE ADDITIVE FOR MOTOR OILS

Abstract

The article is devoted to the synthesis of a chemically modified version of one of the most important additives for the prevention of low-temperature precipitation in engine oils - polyalkenyl succinimide. This additive is prepared by alkylating maleic anhydride with an α-olefin oligomer and then reacting the resulting oligoalkenyl succinic anhydride with various amines. A new compound, an oligomer of hexene-1 with dicyclopentadiene, was used as an alkylating agent, which makes it possible to expand the raw material reserves of oligomeric compounds used in the synthesis of polymer additives, as well as to impart anticorrosive properties to the additive by introducing dicyclopentadiene rings. The composition and structure of the obtained compounds were studied by appropriate physicochemical research methods. The content of 1.5% of the obtained additive in M-11 oil completely eliminates oil corrosion and improves detergent properties. And this allows you to create a lubricant composition with a simpler composition and, as a result, gives an economic effect. The sample of the new additive complies with the requirements for the industrially produced C-5A additive and, in addition to an increased oil viscosity index; it also has anti-corrosion properties, which is due to the chemical structure of the raw material, i.e., the presence of a carbocyclic dicyclopentadiene fragment in the molecule