Abstract:
An electroviscous fluid prepared by dispersing fine solid particles in an electrically insulating fluid. The fine solid particles have a specific gravity equal to, or greater than, that of the elctrically insulating fluid, and have a hydroxyl group on the surface thereof. The hydroxyl group is covalently bonded to a nonionic surfactant having a hydroxyl group and/or an - NH group as a hydrophilic group through a silane coupling agent, or polystyrene is covalently bonded thereto. The fluid is excellent in response, reproducibility, durability and thickening effect, particularly in dispersibility and shelf life stability, and can be utilized for electrical control of vibration control machines such as variable damping dampers, engine mounts, bearing dampers, clutches, valves, shock absorbers, precision equipment, acoustic instruments, etc., and for display devices.
Abstract:
Disclosed are electro-rheological fluids including vermiculite treated with a quaternary ammonium salt, methods of making the same, propylene carbonate adsorbed on the solid phase, butyl benzoate added for the liquid phase, and methods of using the frequency response of electro-rheological fluids to vary apparent viscosity and to compensate for temperature changes in the fluids.
Abstract:
Disclosed are electro-rheological fluids including vermiculite treated with an amine salt, methods of making the same, propylene carbonate adsorbed on the solid phase, n-butyl benzoate added to the liquid phase, and methods of using the frequency response of electro-rheological fluids to vary apparent viscosity and to compensate for temperature changes in the fluids.
Abstract:
Grease compositions, wherein the grease is thickened with a metal hydroxy-containing soap grease thickener are provided. Other ingredients of the compositions include borated hydrocarbylamines and phosphorus and sulfur moieties.
Abstract:
A novel organophilic clay suspension medium prepared by admixing an organophilic clay with a hydrocarbon oil and an activator selected from the group consisting of phenyl hydroxyalkyl ethers and phenylalkanols. Optionally water may be added to the admixture for further improving the suspension medium.
Abstract:
A lubricant comprising an oil-in-water emulsion and solid particles, in which the oil is a lubricating material and the oil droplets are stabilized by a surface coating of partially hydrophobic silica particles of a size less than 1 micrometer. This lubricant is to be used as a hydraulic fluid and as a metal-working or metal-rolling fluid.
Abstract:
Grease compositions, wherein the grease is thickened with a metal hydroxyl-containing soap grease thickener are provided. Other essential ingredients of the compositions include borated hydrocarbyl epoxides and phosphorus and sulfur moieties.
Abstract:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide.