Lubricant composition and triazine-ring-containing compound

A triazine-ring-containing compound represented by a formula (3);

• where X21, X22 and X23 respectively represent a single bond or a bivalent linking group selected from the group consisting of NR1, where R1 is a hydrogen atom or a C1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl and any combinations thereof;
• and R21, R22 and R23 respectively represent a substituted group provided that at least one of R21, R22 and R23 contains an ester bond;
• and a21, a22 and a23 respectively represent an integer from 1 to 5, wherein at least one of R2, R22 and R23 is selected from the group represented by a formula (4);
• where L01 is a bivalent linking group selected from the group consisting of a alkylene group, NR1, where R1 is a hydrogen atom or a C1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl and any combinations thereof and the bivalent linking group may be substituted or non-substituted;
• R01 is a substituted or non-substituted C1-30 alkyl group;
• and p and q respectively represent an integer.

A triazine-ring-containing compound represented by formula (3);

• where X21, X22 and X23 respectively represent a single bond or a bivalent linking group selected from the group consisting of NR1, where R1 is a hydrogen atom or a C1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl and any combinations thereof;
• R21, R22 and R23 respectively represent a substituted group provided that at least one of R21, R22 and R23 contains an ester bond;
• and a21, a22 and a23 respectively represent an integer from 1 to 5, wherein at least one of R21, R22 and R23 is selected from the group represented by a formula (5);
• where R01 is a substituted or non-substituted C1-30 alkyl group, and m and n respectively represent an integer.

A triazine-ring-containing compound represented by formula (3);

• where X21, X22 and X23 respectively represent a single bond or a bivalent linking group selected from the group consisting of NR1, where R1 is a hydrogen atom or a C1-30 alkyl group, oxygen, sulfur, carbonyl, sulfonyl and any combinations thereof;
• R21, R22 and R23 respectively represent a substituted group provided that at least one of R21, R22 and R23 contains an ester bond;
• and a21, a22 and a23 respectively represent an integer from 1 to 5, wherein at least one of R21, R22 and R23 is selected from the group represented by a formula (6);
• where R25 is a substituent group and a24 is an integer from 1 to 5.