Lubricant composition for steel filament and rubber-steel filament composite body

A lubricant composition for steel filament comprising at least one compound selected from the group consisting of sodium 1,6-hexamethylenediamine-dithiosulfate dihydrate, a compound represented by the following formula (1):

• R1—S—S—A—S—S—R2 (1)
• (wherein a is an alkylene group having a carbon number of 2-10, and each of R1 and R2 is a monovalent organic group containing at least one nitrogen atom), a monoalkali metal salt of triazine thiol, a thiadiazole compound, bivalent or trivalent cobalt salt of an inorganic acid, a schiff base complex represented by the following formula (2) or (3):
• 14
• (wherein R3 is an alkyl group having a carbon number of 1-10 and X is —R4— or —R4—NH—R4— in which R4 is an alkylene group having a carbon number of 1 to 10), a cobalt alcholate represented by the following formula (4):
• (R5—O—)2—Co (4)
• (wherein R5 is an alkyl group having a carbon number of 1-20, a phenyl alkyl group or an alkyl phenyl group provided that a carbon number of the alkyl group is 1-10), a cobalt complex represented by the following formula (5):
• 15
• (wherein R6 is an alkyl group having a carbon number of 1-20 or a —NHR7 group or a —OR7 group in which R7 is an alkyl group having a carbon number of 1-20), a metal borate derivative represented by the following formula (6):
• B[Parenopenst]O—M—Y)3 (6)
• (wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a metal aluminate derivative represented by the following formula (7):
• Al[Parenopenst]O—M—Y)3 (7)
• (wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a cobalt, nickel or iron salt of dithiocarbamate or dithiocarbonate, a cobalt dithiocarbamate represented by the following formula (8):
• 16
• (wherein R8 is an alkyl group having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different), a cobalt dithiophosphate represented by the following formula (9) or (10):
• 17
• (wherein R9 or R10 is a hydrocarbon residue having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different), and a molybdenum salt of a carboxylic acid represented by the following formula (11):
• 18
• (wherein R11 is an alkyl group having a carbon number of 1-20).