Patent ID: 7622432

Claim:
A lubricant composition comprising at least one compound selected from the group represented by a formula (3); where X 21 , X 22 and X 23 respectively represent a single bond or a bivalent linking group selected from the group consisting of NR 1 , where R 1 is a hydrogen atom or a C 1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl and any combinations thereof; R 21 , R 22 and R 23 respectively represent a substituent group provided that at least one of R 21 , R 22 and R 23 contains an ester bond; and a21, a22 and a23 respectively represent an integer from 1 to 5, wherein at least one of R 21 , R 22 and R 23 is selected from the group represented by a formula (4 a ), formula (4 b ), formula (5) or formula (6); wherein X 0 represents a single bond or a bivalent linking group selected from the group consisting of NR 1 , wherein R 1 is a hydrogen atom or C 1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl or any combinations thereof: L 0 represents a bivalent linking group selected from the group consisting of an alkylene group, NR 1 , wherein R 1 is a hydrogen atom or C 1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl or any combinations thereof; and R 0 represents a substituted or non-substituted alkyl group or aryl group; where R 01 is a substituted or non-substituted C 1-30 alkyl group and m and n respectively represent an integer; where R 25 is a substituent group and a24 is an integer from 1 to 5.