Patent ID: 9725671
Date: 2017-08-08
CPC Classifications: C10M,C10N,E21B,F16B,F16L

Claim:
1. A lubricant film-forming composition, comprising, as a composition: 40 to 80 mass % of a base oil selected from the group consisting of pentaerythritol fatty acid ester, trimethylolpropane fatty acid ester, and mixtures thereof; 5 to 20 mass % of a solidifying agent consisting of paraffin wax; and 10 to 40 mass % of a solid lubricant selected from the group consisting of alkali metal salt of hydroxystearic acid, alkali earth metal salt of hydroxystearic acid, and mixtures thereof, wherein a total content of the base oil, the solidifying agent, and the solid lubricant is 85 mass % or more and 100 mass % or less, and the lubricant film-forming composition does not contain Pb or Zn.