Abstract:
In a synthetic resin-made thrust sliding bearing 1, a silicone grease whose base oil is a silicone oil, whose coefficient of kinematic viscosity at 25° C. is not less than 100 cSt and not more than 500,000 cSt, and which contains a thickener so as to set its worked penetration to not less than 200 and not more than 400 is interposed at sliding interfaces between, on the one hand, an upper surface of a lower annular flat plate-shaped portion 202 defining a bottom surface of a lower annular recess 204 and a lower surface of an upper annular flat plate-shaped portion 102 and, on the other hand, an upper surface and a lower surface of a thrust bearing piece 300 which are respectively brought into sliding contact with the upper and the lower surface.
Abstract:
A UV-stable lubricating and/or sealing compound, and method for production thereof. The compound includes a base oil and a powder-form inorganic thickener distributed homogeneously therein. At room temperature, the base oil has a vapor pressure of
Abstract:
Elastic solids having reversible stress-induced fluidity are prepared, e.g., by combining liquid formulations with a crystalline mixed metal hydroxide conforming substantially to the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 O where m is amount of Li, d is amount of divalent metal D, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, and xH.sub.2 O represents excess waters of hydration, if any. These make useful coatings. The instantly reversible fluidization of these unique elastic solids may be expressed as: .sigma.=k.sub..alpha. .epsilon. when .epsilon. F, (this equation represents a generalized form for the usual theological equations); for a cycle of .epsilon., -xF
Abstract:
Disclosed are high performance grease compositions containing methylfluoroalkylsiloxanes and solid thickeners containing fluorinated polymers.
Abstract:
A heat-dissipating grease composition which comprises 100 parts by weight of an organopolysiloxane and 100 to 900 parts by weight of an inorganic powder having high thermal conductivity and dispersed in the organopolysiloxane. The organopolysiloxane consists essentially of (1) 100 parts by weight of an organopolysiloxane having a viscosity of 50 to 500,000 centistokes at 25.degree. C. and (2) 1 to 300 parts by weight of an organopolysiloxane which consists essentially of R.sup.1.sub.3 SiO.sub.1/2 units and SiO.sub.2 units, wherein each R.sup.1 is a group selected from an alkyl group, an alkenyl group and an aryl group. The molar ratio between the R.sup.1.sub.3 SiO.sub.1/2 units and the SiO.sub.2 units is in the range of 0.5:1 to 2:1.
Abstract:
A bicycle chain lubricant that may be applied as a coating on a bicycle chain is a crystalline solid at ambient temperatures, yet when the chain is in motion the forces around internal components locally transforms the coating to a lubricous fluid. This increases chain efficiency in the drive train and reduces ware by limiting water and dirt access to chain internal components.
Abstract:
In a synthetic resin-made thrust sliding bearing, a silicone grease whose base oil is a silicone oil, whose coefficient of kinematic viscosity at 25° C. is not less than 100 cSt and not more than 500,000 cSt, and which contains a thickener so as to set its worked penetration to not less than 200 and not more than 400 is interposed at sliding interfaces between, on the one hand, an upper surface of a lower annular flat plate-shaped portion defining a bottom surface of a lower annular recess and a lower surface of an upper annular flat plate-shaped portion and, on the other hand, an upper surface and a lower surface of a thrust bearing piece which are respectively brought into sliding contact with the upper and the lower surface.
Abstract:
The invention provides composites of organic polymeric compositions including a matrix of an organic polymer and a filler distributed throughout the matrix, the flier being present in the matrix substantially as separate particles, each about the fundamental particle size of the filler. The fillers are unique mixed metal hydroxide compositions that are obtainable in sub-micron size particles. These particles are layered and have a BET specific surface area in excess of about 100 m.sup.2 /g. An anion of the particulates is selected to be compatible with the organic polymer thereby providing ease of dispersion of the filler particles throughout the polymer matrix.
Abstract:
A grease composition comprising a grease containing, in a base oil thereof, from 2 to 40% by weight, based on the total composition, of tricalcium phosphate [Ca.sub.3 (PO.sub.4).sub.2 ], the grease further containing (A) from 0.5 to 10% by weight, based on the total composition, of a molybdenum dialkyldithiocarbamate sulfide and (B) from 0.1 to 5% by weight, based on the total composition, of at least one of a zinc dialkyldithiophosphate and triphenyl phosphorothionate. The grease composition is excellent in mechanical stability, heat resistance, extreme pressure properties, and wear resistance.
Abstract:
Lubricating grease having high dropping point, superior stability against oxidation and long life is obtained by having a thickener contained in grease, said thickener comprising the three components:a. lithium soap of C.sub.12-24 hydroxyfatty acid,b. lithium phosphate salt produced from phosphoric or phosphorous acid ester andc. dilithium borate.