CARBAMIDE LUBRICANT COMPOSITION Russian patent published in 2012 - IPC C10M115/08 C10N40/02 

FIELD: chemistry.

SUBSTANCE: carbamide lubricant composition contains: lubricating base oil, a dicarbamide compound of formula (A) R¹¹NHCONHR¹²NHCONHR¹³, where R¹¹ and R¹³ are selected from a group consisting of hydrocarbon groups with 6-20 carbon atoms, wherein at least one of R¹¹ and R¹³ is a dodecyl group, R¹² is a diphenylmethane group; and a dicarbamide compound of formula (B) R²¹NHCONHR²²NHCONHR²³, where R²¹ and R²³ are selected from a group consisting of hydrocarbon groups with 6-20 carbon atoms, wherein at least one of R²¹ and R²³ is an oleyl group, and R²² is a diphenylmethane group.

EFFECT: improved noise characteristics, longer service life of the lubricant at high temperatures while preserving basic characteristics of the lubricant such as shear resistance and heat resistance, while meeting oil-separation characteristics.

12 cl, 5 tbl, 18 ex