Provided is a lubricant composition including a bicyclic liquid crystal of formula (1), tricyclic liquid crystal compounds of formula (2), and formula (3). The composition is suitable for use in a clean environment, under a high vacuum, under high temperature and a bearing.




R1 and R2 are the same or different from each other, and each is —OCH2CH2CH(R′)CH2CH2OR.





R11 and R21 are the same or different from each other, and each is —OR. R12, R13, R22 and R23 are the same or different from each other, and each is hydrogen or a group —OR.





R31 and R41 are the same or different from each other, and each is —OCH2CH2CH(R′)CH2CH2OR. R32, R33, R42, and R43 are the same or different from each other, and each is hydrogen or —OCH2CH2CH(R′)CH2CH2OR. R is a linear or branched CnH2n+1, 1≤n≤20, and R′ is methyl or ethyl.