| 摘要 |
PROBLEM TO BE SOLVED: To provide an association containing no heavy metal nor phosphorus and capable of providing low friction and friction resistance.SOLUTION: The association between a compound represented by formula (1) or formula (1') and a compound represented by formula (2) is provided. A-X (1). A-Y-A' (1'). B-Z (2), where A, A' and B may be same or different and represent a substituted or unsubstituted phenyl group or a heteroaromatic ring having at least one hetero atom selected from a group consisting of a nitrogen atom, an oxygen atom and a sulfur atom and 4 to 6 carbon atoms, X and Z may be same or different and X, Y and Z represent functional groups capable of forming a hydrogen bond between Y and Z or between X and Z.SELECTED DRAWING: None |
