FIELD: chemistry.
SUBSTANCE: invention relates to hydrogenated polymers with a radial structure having a core made up of calixarenes, and can be used in lubricating oils as additives that improve the viscosity index. Hydrogenated polymers with a radial structure are obtained, having a core made of calixarenes of general formula (I) to which are attached a number of P segments of hydrogenated linear polymers selected from hydrogenated homopolymers or copolymers of conjugated dienes, or hydrogenated copolymers of said conjugated dienes and monoalkenyl arenes and mixtures thereof.
EFFECT: invention allows to impart thickening ability, resistance to mechanical shear, thermal-oxidative stability, resistance to the formation of deposits and to exhibit low-temperature behavior.
23 cl, 5 tbl, 25 ex
