Abstract:
A lubricating oil additive comprising a stable dispersion of finely divided polytetrafluoroethylene particles having a relatively high molecular weight, a polymeric, oil-soluble dispersant containing nitrogen, an organo-clay anti-sedimentation agent and a polar activator therefor in a lubricating oil, the additives being free of polytetrafluoroethylene sedimentation, together with lubricating oils containing such additives and processes for producing the additives.
Abstract:
A microporous lubricating composition is disclosed that includes an ionomer polymer and a liquid lubricant. The ionomer polymer can be combined with other polymers and the composition can include various additives to modify the performance and properties of the formed composition. The formed composition is useful for lubrication of mechanical components including wire rope and bearings such as journal bearings.
Abstract:
A friction material member particularly useful in high load and temperature applications and a method for making the same are disclosed. The friction material member is made by preparing a mixture of sinterable metal particles, carbonaceous material, friction enhancers and curable polymeric resin; the mixture comprising at least about 50 percent by weight of metal particles and sufficient resin to coat and bond the metal particles, carbonaceous material and friction enhancers. The mixture is molded and the resin cured to form a piece in a solid preformed shape corresponding to the shape of the mold. Thereafter, the preformed piece is heated in a substantially oxygen free atmosphere for a time and at temperatures and pressures sufficient to fuse at least a portion of the metal particles into a sintered metal matrix. The preformed piece may be sintered to a metal backing plate during the heating step, or may be welded, brazed or soldered to the plate after heating. The resulting product may be classified as a hybrid friction material, i.e., being a cross between semi-metallic and sintered full metallic friction materials.
Abstract:
This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula: ##EQU1## is which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbons atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is O, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a'where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen. These new organosiloxanes may be used as lubricants for inorganic and organic fibers, metal surfaces and as hydraulic fluids.
Abstract:
Oil-type, deep drawing lubricants for use primarily on ferrous sheet metal surfaces and the like may consist essentially of a dispersion of from about 2 to 20 parts by weight of a high viscosity liquid polar lubricant dispersed as a discontinuous phase in an anhydrous, hydrocarbon, liquid vehicle of relatively low viscosity with the aid of at least one emulsifying agent. The lubricants preferably contain at least one corrosion-inhibiting agent and at least one agent for facilitating removal of the lubricant composition from the surface of a fabricated workpiece. The lubricants may be applied to a workpiece at the steel mill or in a blanking line by conventional liquid lubricant application procedures as thin films in which the dispersed phase quickly splits from the continuous phase and forms an ultra-thin, adherent film overlaid by a thin film of the material of the continuous phase.
Abstract:
A damping agent for damping mechanical and/or acoustical vibrations. The agent includes a fluid phase of a polyglycol, silicone oil, mineral oil, and/or a saturated aliphatic or aromatic carboxylic acid ester having graphite dispersed therein. The graphite is dispersed by means of a wetting agent. Anti-oxidants and an agent to stabilize the structural viscosity of the damping agent may also be included.
Abstract:
The invention concerns an improvement in the process for the production of dispersions of diorganopolysiloxanes and lubricant-acting inorganic silicates in water, whereby these dispersions contain, in addition to the above-mentioned substances, lecithin and nonionic emulsifiers, as well as solvents, ionic emulsifiers, lubricants other than inorganic silicates and diorganopolysiloxane, bactericides, fungicides, thickeners, antifoaming agents, rust inhibitors and dyes. The improvement is achieved by emulsifying the lecithin, nonionic emulsifier and water with each other before this mixture is mixed with at least 80% by weight of the diorganopolysiloxane contained in the finished dispersion, and, optionally, lubricants other than inorganic silicates and diorganopolysiloxanes. Furthermore, the invention concerns the application of the dispersions produced according to the invention as release agents, especially as inner tire release agents.
Abstract:
Lubricating compositions including all types of greases and oils such as cutting oils and rolling oils having enhanced extreme pressure wear properties are provided by including in them as an extreme pressure additive a synergistic mixture of one or more polymers of 1,2,4-and 1,3,4-thiadiazoledithiols and molybdenum disulfide.
Abstract:
Metal working operations, especially drawing, are facilitated by applying to the metal a composition which provides lubricity thereto and which melts within the range of about 30.degree.-100.degree. C. The composition comprises at least one neutral ester, and preferably a mixture of esters, prepared from polyalkylene glycols and saturated aliphatic alcohols having at least about 10 carbon atoms, and C.sub.12-25 aliphatic monocarboxylic acids and C.sub.4-20 aliphatic polycarboxylic acids. The preferred ester mixtures are prepared from polyethylene glycols, C.sub.14-20 predominantly straight chain alkanols, stearic acid and adipic, azelaic or sebacic acid. Optional ingredients include phosphorus acid salts and antioxidants. The composition may be applied in liquid form and solidifies on cooling to normal ambient and storage temperatures.
Abstract:
Antifriction compositions useful for bearings comprising poly(arylene sulfide), a solid lubricating component, a reinforcing material, and a filler in which the commonly employed antimony trioxide filler is replaced in whole or in part by a replacement filler of calcium carbonate, titanium dioxide, barium sulfate, hydrated aluminum silicates, red iron oxide, carbon black or diatomaceous earth, compatible with the other components.