| 摘要 |
A powder metallurgy lubricant includes an aromatic carboxylic acid represented by a formula (1),
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ(Z)n-Ar-COOH€ƒ€ƒ€ƒ€ƒ€ƒ(1)
where Ar represents an aryl group and Z represents a substituent directly bonded to the above aryl group and is one of R, OR, OCOR and COOR, R representing one of an alkyl group, alkenyl group and alkynyl group and n being an integer in a range from 1 to 4. Z may be mutually the same or different when n is 2 or larger. |
