Abstract: A lubricating oil composition contains: (A) organopolysiloxane; and (B) at least one of a sulfur compound, a phosphorus compound and a zinc compound, the lubricating oil composition having a kinematic viscosity not less than 1 mm2/s and less than 40.0 mm2/s at 100 degrees C. The lubricating oil composition is favorably usable in mechanical devices such as a hydraulic device, a stationary gear, an automobile transmission, a motor/battery cooling device and a joint.

Abstract: A lubricant composition comprising a major amount of a base oil having a kinematic viscosity between 2 and 8 cSt at 100° C. and a minor amount of an additive composition represented by formula IV: wherein x and y can be the same or different and (x+y) equals between 50 and 1,500 and m and n can be the same or different and Q is hydrogen or a monovalent organic group selected from the group consisting of C1-C8 alkyl, acetyl and isocyanato group of the formula —NCO.

Abstract: The invention concerns a method for preparing a lubricating composition, characterised in that it comprises mixing two previously prepared oil-in-water emulsions (A) and (B): the prior emulsion (A) comprises: (a) at least a non-reactive linear polyorganosiloxane oil comprising per molecule at least 2% in number of organic substituents bound to the silicon atoms which are aryl, alkylarylene and/or arylenealkyl radicals; (b) at least a polyorganosiloxane resin bearing hydroxyl groups and comprising at least two different siloxyl units selected among those formula (R1)3SiO1/2(M), (R1)2SiO2/2(D), R1SiO3/2(T) and SiO4/2(Q), one at least of said units being a unit T or Q, R1 representing an organic substituent; (c) at least a crosslinking agent soluble in the silicone phase comprising at least two functions capable of reacting with the polyorganosiloxane resin(s) (b); (d) a condensation catalyst capable of catalysing the reaction of the constituent (b) with the constituent (c); (e) a surfactant; and (f) water; the

Abstract: The invention concerns a lubricating composition, in the form of an oil-in-water emulsion, based on siioxane and not releasing hydrogen comprising: (a) a polydiorganosiloxane oil non-reactive to the lubricating properties having a dynamic viscosity of the order of 5.10−2 to 30.102 Pa.s at 25° C.; (b) a polyorganosiloxane resin bearing, before emulsification, condensable hydroxyl substituents and comprising before emulsification at least two syloxyl units selected among those of formula (R0)3SiO1/2(M); (R0)2SiO2/2(D); R0SiO3/2(T) and SiO4/2(Q), one at least of said units being a T or Q unit, formulae wherein: R0 represents a monovalent organic substituent, the average number per molecule of organic radicals R0 for a silicon atom ranging between 1 and 2; and said resin having a weight content of hydroxyl substituents ranging between 0.1 and 10 wt. %, and, preferably between 0.2 and 5 wt.

Abstract: The invention concerns a lubricating composition, in the form of an oil-in-water emulsion, based on siioxane and not releasing hydrogen comprising: (a) a polydiorganosiloxane oil non-reactive to the lubricating properties having a dynamic viscosity of the order of 5.10−2 to 30.102 Pa.s at 25° C.; (b) a polyorganosiloxane resin bearing, before emulsification, condensable hydroxyl substituents and comprising before emulsification at least two syloxyl units selected among those of formula (R0)3SiO1/2(M); (R0)2SiO2/2(D); R0SiO3/2(T) and SiO4/2(Q), one at least of said units being a T or Q unit, formulae wherein: R0 represents a monovalent organic substituent, the average number per molecule of organic radicals R0 for a silicon atom ranging between 1 and 2; and said resin having a weight content of hydroxyl substituents ranging between 0.1 and 1 0 wt. %, and, preferably between 0.2 and 5 wt.

Abstract: A grease for a bearing of a fan comprises a base oil selected from a various kinds of silicone oils having a viscosity of 30 to 500 mm2/s at 40 degree-C. and a viscosity of 30,000 mm2/s or less at −30 degree-C., and a diurea compound, as a thickening agent, at the compounding ratio of 2 to 30%-wt. The urea compound has a general formula of: R1—NHCONH—R2—NHCONH—R3 wherein R2 indicates a tolylene group, a diphenylmethan group or a dimethylbiphenylene group, and R1 and R3 respectively indicate a straight chain saturated alkyl group having the number of carbon atoms of 6 to 18, and an alicyclic group, and wherein the ratio of the straight chain saturated alkyl group to the alicyclic group is within a range of 5 to 95 mol-% to 95 to 5%-mol. The grease maintains its properties suitable for use in a fan, and effectively restrict or prevent generation of hoot sound, while providing satisfactory durability and cost-effctiveness.

Abstract: Foamable, silicone oil compositions and methods of lubricating surfaces with such compositions. Compositions in accordance with the invention may be sprayed onto surfaces from aerosol canisters or other spray containers to form stable foams which do not run or drip, preferably for periods in excess of sixteen hours. A composition in accordance with the invention comprises an aqueous emulsion of a silicone oil. Oil-in-water emulsions of polysiloxanes, such as polydimethylsiloxane, having melting points no greater than about 32.degree. F. (0.degree. C.) are preferred. The composition further comprises a liquefiable gaseous propellant, preferably including a volatile liquid hydrocarbon or a mixture of volatile liquid hydrocarbons. The composition further comprises a solid, non-ionic lipophilic surfactant, preferably having an HLB value of about 3 to about 8, more preferably about 3.5 to about 6. Useful surfactants include fatty acid esters, fatty alcohol ethers and fatty acid amides.

Abstract: A bearing grease composition for ABS pumps comprises:a silicone oils having a viscosity of 100 to 1,000 cSt (at 25 degree-C.), the silicone oil serving as essential components of a base oil portion, anda diurea compound, as a thickening agent, at the compounding ratio of 2 to 30%-wt, the diurea compound having a general formula of:R.sub.1 --NHCONH--R.sub.2 --NHCONH--R.sub.3wherein R.sub.2 indicates an aromatic bivalent hydroxyl group having the number of carbon atoms of 8 to 16, and R.sub.1 and R.sub.3 respectively indicate a saturated straight chain alkyl group having the number of carbon atoms of 6 to 18, and a cyclohexyl group, and wherein the ratio of the saturated straight chain alkyl group to the cyclohexyl group is within a range of 5 to 95%-mol to 95 to 5%-mol.

Abstract: A substantially mineral oil-free aqueous composition useful either as is or to produce a dry lubricant film, the composition consisting essentially of water; a silicone oil, a vegetable oil or a mixture thereof; at least one waxy film-forming material selected from at least two of the following three groups: (a) saturated C.sub.10 -C.sub.24 aliphatic monohydric alcohols, (b) saturated C.sub.10 -C.sub.24 aliphatic monocarboxylic acids, and (c) saturated or monounsaturated C.sub.10 -C.sub.24 aliphatic primary amides; an extreme pressure agent; and an anionic surfactant; nonionic surfactant or mixture thereof capable of stably dispersing the oil and film-forming mixture in the water.

Abstract: A substantially mineral oil-free aqueous composition useful to produce a dry lubricant film comprising water; a silicone oil, a vegetable oil or a mixture thereof; at least one waxy film-forming material selected from at least two of the following three groups: (a) saturated C.sub.10 -C.sub.24 aliphatic monohydric alcohols, (b) saturated C.sub.10 -C.sub.24 aliphatic monocarboxylic acids, and (c) saturated or monounsaturated C.sub.10 -C.sub.24 aliphatic primary amides; and an anionic surfactant; nonionic surfactant or mixture thereof capable of stably dispersing the oil and film-forming mixture in the water.