Abstract:
A lubricating grease composition containing a base oil having a kinematic viscosity of 10 mm2/s or more and 60 mm2/s or less at 40° C.; a thickener containing at least one soap selected from a metal soap and a metal complex soap; and a solid lubricant containing porous polyamide particles. An amount of the porous polyamide particles blended is 1% by mass or more and 20% by mass or less based on a total mass of the lubricating grease composition.
Abstract:
A grease composition comprises a base oil and an aluminium complex soap thickener, with graphite, molybdenum di-sulphide, calcium carbonate and bismuth sulphide all included as additives. The composition exhibits advantageous load, wear and friction performance, especially in extreme pressure environments, and is particularly suitable for use on open gears.
Abstract:
Lubricant composition comprising a polyisobutene polymer having a number average molecular weight of 300-5000 g/mol and at least 60 mol % terminal double bonds based on the total number of double bonds in the polymer, and an ester component and/or an alkylated naphthalene compound having kinematic viscosity in the range of 2 to 15 mm2/s at 100° C.
Abstract:
A fluid blend suitable for use as a lube basestock comprises two major components: (A) a copolymer made from ethylene with one or more alpha olefins, the copolymer (i) containing not more than 50 wt % ethylene; (ii) having a number average molecular weight of from 400 to 10,000; and (iii) a molecular weight distribution
Abstract:
A process for producing a polymer of an alpha-olefin. The process includes polymerizing one or more alpha-olefins having at least 4 carbon atoms in the presence of a catalyst for producing polymers of olefins. The catalyst contains (A) a specific metal compound and (B) either or both of (b-1) an organoaluminum oxy compound and (b-2) an ionic compound. The polymer of an alpha-olefin is useful as a lubricant component.
Abstract:
A rock bit for drilling subterranean formations is lubricated with a grease composition made from a high-viscosity synthetic lubricant basestock and a combination of lubricant additives. The grease composition preferably has in the range of from 1 to 20 percent by weight polyisobutylene, in the range of from 50 to 90 percent by weight ethylene-alphaolefin, up to approximately 40 percent by weight polyalphaolefin, and in the range of from 4 to 45 percent by weight lubricant additives. The rock bit grease composition has a viscosity index in the range of from about 250 to 325, and has an absolute viscosity of greater than about 100,000 centipoise at a temperature of approximately 70.degree. F. and at a shear rate of less than about 40 seconds.sup.-1, without the use of solid metal-containing extreme pressure agents or thickening agents. The grease composition forms a lubricant film having enhanced thicknesses, when compared to conventional mineral oil-based greases, to provide excellent rock bit bearing lubrication.
Abstract:
A stearate free solid lubricant for cold working of metals contains approximately equal amounts of an alkene-acrylate ionomer and an alkoxylated alcohol in which the alcohol moiety has from 18-60 carbon atoms and the alkoxylate block has about the same number of carbon atoms. This lubricant can be conveniently applied from aqueous solution/suspension and works effectively even when the underlying steel surface has no conversion coating, which is usually required with stearate lubricants for best results.
Abstract:
Compounds of formula I ##STR1## where R.sub.1 and R.sub.2 independently are alpha-branched alkyl of 3 to 8 carbon atoms, R.sub.3 is hydrogen, R.sub.4 is ethylene, 1,3-propylene or 1,4-butylene, and n is 2 or 4 are effective stabilizers for protecting elastomeric or acrylonitrile copolymer compositions or lubricating oil compositions against thermal oxidation and discoloration. 2-Mercaptoethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is particularly useful.
Abstract:
This invention provides a technique for extremely rapid dissolution, or dispersion on essentially the molecular level, of certain polymeric materials in compatible liquid vehicles. The polymeric materials are comminuted at cryogenic temperatures and are then introduced into a liquid vehicle preferably while still at or near cryogenic temperature. At low concentrations, the resulting blend or system displays reduced friction to flow while high concentrations may be used to immobilize the liquid vehicle and/or reduce its vapor pressure.