Patent ID: 7789934

Claim:
A lubricant for powder metallurgy comprising a polyhydroxycarboxylic acid amide of the following formula (1): (wherein R 1 represents an alkyl group having from 2 to 10 carbon atoms and substituted with plural hydroxyl groups; R 2 represents a hydrocarbon group having from 8 to 30 carbon atoms; and R 3 represents a hydrogen atom, or a hydrocarbon group having from 1 to 30 carbon atoms) and an auxiliary lubricant which is at least one selected from a metal soap, an alkylenebis-fatty acid amide and a fatty acid amide of the following formula (2): (wherein R 4 represents a hydrocarbon group having from 7 to 29 carbon atoms; R 5 represents a hydrogen atom, or a hydrocarbon group having from 1 to 30 carbon atoms).