Component for timepiece, movement, and timepiece
There are provided a component for a timepiece, a movement, and a timepiece having excellent lubricating oil holding performance. There is provided a component for a timepiece including a sliding surface having a surface tension of 10 to 35 mN/m. It is preferable that when lubricating oil having a surface tension of 25 to 35 mN/m is applied to the sliding surface, an interfacial tension between the sliding surface and the lubricating oil is 0 to 7 mN/m.
1. A component for a timepiece, comprising a sliding surface having a surface tension of 10 to 35 mN/m,
wherein the sliding surface comprises an oil holding film comprising a compound represented by the formula (1):
wherein M 1 is silicon, titanium, or zirconium;
R is a hydrocarbon group;
each of Y 1 and Y 2 independently is a hydrocarbon group, a hydroxy group, or a functional group that generates the hydroxy group by hydrolysis; and
Z 1 is a polar group.
2. The component for a timepiece according to claim 1 , wherein, when a lubricating oil having a surface tension of 25 to 35 mN/m is applied to the sliding surface, an interfacial tension between the sliding surface and the lubricating oil is 0 to 7 mN/m.
3. A movement comprising the component for a time piece according to claim 1 .
4. A timepiece comprising the movement according to claim 3 .
5. The component for a timepiece according to claim 1 , wherein the compound is selected from the group consisting of: