摘要:
The invention relates to a water-based biodegradable and non-toxic functional fluid for mechanical drives, preferably for use in steam engines. The object of providing such functional fluids for use in mechanical drives, particularly for the hydrodynamic lubrication of plain bearings, preferably for crankshafts of superheated steam engines, having customary bearing play which is not overly precise, is achieved. It should be capable of being used in closed power plant systems also at sump temperatures higher than 120° C., e.g. in the crankcase under a crank shaft, and should be water-based or water-dilutable. According to the invention, this is achieved by addition of a low percentage of polyaspartic acid to water or to water/glycol mixtures, preferably polyaspartic acid having a molar mass of from greater than 1,000 to 10,000 g/mol being used.
摘要:
The invention relates to a water-based biodegradable functional fluid for mechanical drives, preferably for use in steam engines. The aim of the invention is to create functional fluids for use in mechanical drives, particularly for hydrodynamically lubricating plain bearings, preferably for crankshafts of superheated steam engines having customary non-overly precise bearing play. The inventive fluids should be able to be used in closed power pack systems also in the existence of sump temperatures exceeding 120 null C., e.g. in the lubricant pan located under a crank drive and be water-based or able to be diluted with water. According to the invention, this is achieved by a percentually low addition of polyaspartic acid to water or to water-glycol mixtures, whereby polyaspartic acid having a molar mass greater than 1,000 and up to 10,000 g/mol is preferably used.
摘要:
A method is provided for lubricating a die cavity that includes applying a lubricant composition containing a high melting point polymeric wax lubricant to the wall of a die cavity. Preferably, the lubricant is a polyamide lubricant that has a melting temperature greater than the temperature of the die wall during use. The present invention also provides a method of making a compacted metal part that includes applying the lubricant composition to an internal wall of a die cavity, introducing a metal-based powder composition into the die cavity; and compacting the powder composition at a pressure sufficient to form a compacted part from the metal powder composition.
摘要:
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of (A) a polymer substituted mono- or dicarboxylic acid material, (B) an optionally alkyl-substituted N-hydroxyaryl compound, (C) an aldehyde, and (D) an amido-amine or thioamido-amine wherein the polymer moiety of the mono- or dicarboxylic acid material is derived from a polymer of 300 to 10,000 number average molecular weight, and wherein the amido-amine and thioamido-amine reactants are derived by reacting polyamines and alpha, beta-unsaturated compounds. The Mannich Base condensates of this invention are useful as dispersants.
摘要:
Lubricant compositions adapted for use under extreme conditions comprising a major proportion of an oil or grease base material, and a minor proportion of an aromatic polyamide fibrous substance in an amount sufficient to impart a fibrous texture to the base material.