公开(公告)号：GB708908A

公开(公告)日：1954-05-12

申请号：GB2195250

申请日：1950-09-06

Applicant: STANDARD OIL DEV CO

Inventor： MORWAY ARNOLD JESSE ,  BALL EARL WILSON

IPC: C10M169/00

Abstract: A lubricating grease comprises from 30 to 60 per cent. by weight of an asphaltic residuum having a viscosity of from 1000 to 5000 s.s.u. at 100 DEG F., 20 to 50 per cent. by weight of a mineral lubricating oil having a viscosity between 35 and 300 s.s.u. at 210 DEG F., 8 to 18 per cent. by weight of an alkali or alkaline earth metal soap of fatty acids having 12 to 22 carbon atoms in the molecule and 1 to 15 per cent., preferably 6 to 12 per cent., by weight of an extreme-pressure additive. The composition is non-brittle at temperatures below 0 DEG F. and remains solid up to 250 DEG F. The asphaltic residuum preferably has a viscosity of 2500 s.s.u. at 100 DEG F. The preferred alkali or alkaline-earth metal soap is the sodium soap of rapeseed oil, but sodium stearate or calcium stearate may also be used. Lead oleate is the preferred extreme-pressure agent, and may be used in an amount of about 10 per cent. Conveniently it may be added as a 50-50 solution in mineral soil. Chlorinated and/or sulphurized fatty oils or hydrocarbons may also be used as extreme-pressure agents. From 0.05 to 1 per cent., preferably about 0.2 per cent., based on the total composition, of an oil-soluble sodium petroleum sulphonate, preferably of molecular weight 450 to 500, may also be added, to inhibit rust-formation. Other known corrosion inhibitors such as partial esters of polyhydric alcohols may be used in place of the sodium petroleum sulphonate. The petroleum sulphonate is preferably added after the grease has been cooled from its maximum temperature. Other additives such as antioxidants, rust inhibitors, viscosity index improvers, tackiness agents and polymeric thickeners may be added if desired. In an example a grease composition is prepared from 8.8 per cent. by weight of rapeseed oil, 1.9 per cent. of caustic soda, 29.1 per cent. of low and cold-test mineral oil of 50 s.s.u. viscosity at 210 DEG F., 0.2 per cent. of sodium petroleum sulphonate of molecular weight 450 to 500, 40 per cent. of asphaltic residuum of 2500 s.s.u. viscosity at 100 DEG F., and 20 per cent. of a 50 per cent. solution of lead oleate in mineral oil.