| abstract |
Provided is a novel lubricant capable of suppressing seizure due to the friction between metal materials.The above-mentioned object can be achieved by a lubricant including a smectite clay mineral, and an ammonium ion obtained by cationization of a primary amine, a secondary amine or a tertiary amine, the ammonium ion being intercalated between layers of the smectite clay mineral, the primary amine, the secondary amine or the tertiary amine containing one or more long-chain alkyl groups each having 8 or more carbon atoms in a main chain, the total number of carbon atoms in the main chains of the long-chain alkyl groups being 16 or more. |