Abstract:
Use as additive to stabilize perfluoropolyether lubricant oils at high temperatures, preferably higher than 200° C., of a solid polymer at room temperature, having a softening or a melting point higher than 150° C., preferably higher than 200° C., and containing in the repeating unit at least one aromatic ring; preferably in the backbone, and lubricating compositions containing said additive.
Abstract:
Provided is a grease composition with a long service life under high-temperature conditions, considerable low-evaporability, and incombustibility.The invention provides a grease composition comprising, as a base oil, an ionic liquid formed of a cation and an anion and having an ion concentration of 1 mol/dm3 or more as measured at 20° C., and a thickener having a dropping point of 260° C. or higher.
Abstract:
A composition for a lubricating fast-setting epoxy compound comprising substantially equal amounts of an epoxy base and an epoxy accelerator. The epoxy base comprises: a first micro-crystalline filler, a first talc, a hardenable epoxide containing liquid; and a titanium oxide. The epoxy base can also include a flatting agent. The epoxy accelerator comprises: a second micro-crystalline filler, a second talc, a methylamino accelerator, and a hydrocarbon resin. The epoxy accelerator can also include a modified aliphatic amine, an acrylic resin, a coloring agent, or combinations thereof.
Abstract:
Fluorinated greases comprising: (A) from 1% to 50% by weight of a thickener; (B) from 99% to 50% by weight of a mixture of: (B1) from 0, 1 to 100% by weight of a compound of structure: X1—O(CF2O)n(CF2CF2O)m(CF2CF2CF2O)p(CF2CF2CF2CF2O)q—X2 (I) wherein: X1, X2 have formula —(CF2)ZCF3 wherein z is an integer between 0 and 3; n is an integer between 1 and 200; m is an integer between 0 and 200; p, q are integers between 0 and 10; with the proviso that: the (p+q)/(p+q+m+n)≦0.05; m/n≦0.7; the number average molecular weight of (I) is between 1,000 and 10,000; the kinematic viscosity at 40° C. is lower than 20 cSt; and (B2) from 99.9% to 0% by weight of a perfluoropolyether oil having a kinematic viscosity at 40° C. higher than 15 cSt and comprising repeating units of the type (CFXO) wherein X is F or CF3; —CF2CF2O—, —C3F6O, —CF(CF3) CF2O, —CF2CF (CF3) O—, statistically distributed along the chain.
Abstract:
A syringe coated with a lubricant containing a silicone oil and a fine silica powder on the inner surface of the barrel of the syringe can be used for injection of a surface-active drug solution without oil droplet formation on the inner surface while preventing an increase of the gasket sliding friction.
Abstract:
A lubricant for a run-flat tire system includes a water soluble, or water-miscible carrier, a thickener, and a surfactant. The thickener hereof retains its rheological properties and is not subject to permanent thinning shear. The base fluid is, preferably, a water-soluble polyhydroxyl or other polyhydric compound and the thickener is preferably a clay. When admixed with a surfactant and, optionally, a lubricity agent, the lubricant exhibits long term stability and (is resistant to heat buildup.) prevents the buildup of heat in the tire assembly when the tire is in the run flat condition.
Abstract:
An aqueous based functional system contains a stable fluid polymer suspension (FPS) thickening agent of a polysaccharide, polyethylene glycol (PEG), and hydrated thickening silica. The functional systems may be formulations of personal care excluding oral care, household care, oil field servicing fluids, Civil Engineering servicing fluids, paper coatings, construction fluids, ceramic glazes, foods, firefighting retardants, mineral processing, aqueous based coatings, building materials, construction, pharmaceuticals, medical care, paper making process, and paper coating. The FPS provides to the functional system comparable or better rheology and viscosity properties as compared to when using similar thickening agents in dry, solid form. A method of preparing the aqueous based functional system is also provided by adding a sufficient amount of a stable FPS that is compatible with the functional system to the system to thicken the functional system.
Abstract:
The invention relates to a grease composition including a base oil and a thickener that provides hydrophilic metal oxide particles and one or more amides which contain one or more unsaturated C—C bonds and/or at least one OH group. The hydrophilic metal oxide particles have a BET specific surface area of at least 10 m2/g and at least 80% of the hydrophilic metal oxide particles have a particle size in the range of from 5 nm to 900 μm. The amount of the thickener is in the range of from 0.1-40% by weight, based on the total weight of the grease composition. The invention further relates to methods for manufacturing the grease composition, and the use of the grease composition for lubricating bearings, gears and couplings.
Abstract:
The invention relates to a food-compatible high-temperature lubricant, more particularly a high-temperature oil and a high-temperature grease, comprising the following components: a) at least one oil selected from a trimellitic ester or a mixture of different trimellitic esters, alkylaromatics, preferably an aliphatically substituted naphthalene, or estolides; b) a hydrogenated or fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; and c) additives individually or in combination. In the case of the high-temperature grease, a thickener is added.