Revue de l Institut Francais du Petrole, Vol.52, No.1, 35-44, 1997
Phosphosulphurized antiwear and extreme-pressure VI polymer additives, synthesis, characterisation and lubricant applications
Polyalkylmethacrylates (PMA) and an ethylene/propylene copolymer (OCP), usable both as lubricant VI improver and antiwear extreme-pressure (AW-EP) additives, were prepared by introducing AW-EP functional moieties on PMA and OCP back-bones under the form of dialkyldithiophosphoric esters; mechanical performances of these polymers were pre-assessed by means of a four-ball machine.