13387results about "Lubricant composition" patented technology

A medical device for use in surgery made of a metal having a first hard coating layer applied to the metal, a second PTFE coating layer applied to the hard coating, and a third soap based lubricant coating layer applied to the PTFE layer.

The invention relates to a process for producing a hydrocarbon component of biological origin. The process comprises at least two steps, the first one of which is a HDO step and the second one is an isomerization step operated using the counter-current flow principle. A biological raw material containing fatty acids and / or fatty acid esters serves as the feed stock.

The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.

The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.

The invention refers to a method and system for purifying the hydraulic pressure oil in hydraulic pressure machine. The method includes magnetism absorbing step which absorbs the metal particles in the hydraulic oil through magnetism structure onto the magnetism structure and a filter step blocking the impurities in the sift filter core, and finishes the first grade filter, and the second filter step with a sorption filter; the system includes: forward oil boxes connected in series, oil heater, magnetism filter, oil pump, sorption filter, backwards oil boxes and electric control system. Each device is connected through oil pipes and valves, all of which are set in a mobile machine box, moves the box, the purification to hydraulic pressure oil of different locations can be carried on conveniently.

Biofuels can be produced via an organic phase hydrocatalytic treatment of biomass using an organic solvent that is partially miscible with water. An organic hydrocarbon-rich phase from the hydrocatalytically treated products can be recycled to form at least a portion of the organic phase.

A filter for filtering a liquid, such as coolant for an internal combustion engine, having a filter housing with at least one liquid inlet and at least one liquid outlet, a filter element which is arranged in a sealing manner between the inlet and outlet so that the filter element separates a filtered liquid side from an unfiltered liquid side, and having an additive or inhibitor disposed in the housing such that when contacted by liquid passing through the filter, the additive is released into the liquid, in which the additive is tightly encased in a liquid-soluble material which dissolves on coming in contact with the liquid being filtered.

The invention discloses a water soluble full-alloy metal grinding fluid which belongs to the technical field of metal grinding fluids. The metal grinding fluid is prepared from the following components in percentage by weight: 5-40wt% of an antirust agent, 1-20wt% of a cleaning agent, 0.1-10wt% of a lubricating corrosion inhibitor, 1-20wt% of a penetrant, 1-20wt% of a solubilizer, 10-40wt% of a PH adjustor, 0.5-5wt% of a defoamer and the balance of water. Based on the total weight of the water soluble full-alloy metal grinding fluid, the pH value of the water soluble full-alloy metal grinding fluid is 7-11. The lubricating corrosion inhibitor is long chain nitrogen heterocyclic ring organic ester. The water soluble full-alloy metal grinding fluid has excellent lubricating, rust-preventing, cleaning and cooling performances and can be widely applied to grinding of ferrous metals and nonferrous metals.

The present invention relates to compositions and processes of using perfluoropolyether to maintain or improve the oil return, lubrication, cooling capacity, or energy efficiency of a refrigeration, air conditioning or heat transfer system.

A method for producing lubricant base oils is provided comprising the steps of: (a) separating a feedstock into a light lubricant base oil fraction and a heavy fraction; (b) hydroisomerizing the fractions over a medium pore size molecular sieve catalyst under hydroisomerization conditions to produce an isomerized light lubricant base oil fraction having a pour point less than or equal to a target pour point of the lubricant base oils and an isomerized heavy fraction having a pour point of equal to or greater than the target pour point of the lubricant base oils and a cloud point greater than the target cloud point of the lubricant base oils; and (c) dehazing the isomerized heavy fraction to provide a heavy lubricant base oil having a pour point less than or equal to the target pour point of the lubricant base oils and a cloud point less than or equal to the target cloud point of the lubricant base oils.

The invention relates to a self-greasing paint which can prevent screw thread from sticking and wearing and a preparation method thereof. The self-greasing paint which can prevent screw thread from sticking and wearing is a two-component self-greasing paint that consists of a component A and a component B. Component A consists of raw materials with weight proportion of 40-90 percent of film-forming material, 5-60 percent of solid greasing material, 0-10 percent of additive, 0-50 percent of solvent, 0-10 percent of color paint and 0-10 percent of filling while component B consists of raw materials with weight proportion of 50-100 percent of curing agent and 0-50 percent of solvent. The weight ratio of component A and component B is 1 to 0.1-5. The friction coefficient of the coat formed by the paint is low and the paint has self greasing function, anti-sticking and wearing resistant performances; the invention reduces and even avoids the use of grease and solves pollution problem caused by grease. The self-greasing paint is applicable to various mechanical parts such as bolt, screw, etc., in particular to screw threads of oil pipe, cashing and drill rod, etc. that are special for oil industry.

The present invention relates to compositions and processes of using perfluoropolyether to maintain or improve the oil return, lubrication, or energy efficiency of the refrigeration, air conditioning and heat transfer system.

This invention relates to processes of producing lubricant base oils comprising paraffinic hydrocarbon components that have optimized branching. The lubricant base oils comprising paraffinic hydrocarbon components with optimized branching have low amounts of branching with the branching concentrated toward the center of the lubricant base oil molecules. The lubricant base oils comprising paraffinic hydrocarbon components with optimized branching have low pour points and extremely high viscosity indexes. The invention further relates to processes of producing commercial lubricants comprising the lubricant base oils comprising paraffinic hydrocarbon components with optimized branching from waxy feeds.

The present invention relates in one embodiment to magnetorheological fluids utilized in prosthetic joints in general and, in particular, to magnetorheological fluids utilized in controllable braking systems for prosthetic knee joints. Preferred magnetorheological fluids of the present invention comprises polarizable iron particles, a carrier fluid, and optionally an additive. Preferred additives include, but are not limited to functionalized carrier fluids as well as derivatized fluoropolymers. Preferred carrier fluids include, but are not limited, to perfluorinated polyethers.

This invention relates to processes of producing lubricant base oils comprising paraffinic hydrocarbon components that have optimized branching. The lubricant base oils comprising paraffinic hydrocarbon components with optimized branching have low amounts of branching with the branching concentrated toward the center of the lubricant base oil molecules. The lubricant base oils comprising paraffinic hydrocarbon components with optimized branching have low pour points and extremely high viscosity indexes. The invention further relates to processes of producing commercial lubricants comprising the lubricant base oils comprising paraffinic hydrocarbon components with optimized branching from waxy feeds.

The invention relates to calcium sulfonate complex grease and a manufacture method thereof, in particular to grease producing the thickening agent by synthetic reaction with super-high base value. At first, the lubricating base oil and the calcium sulfonate are added into an opening reaction kettle to be stirred, the phase inversion promoter, the glacial acetic acid and the water are added into the kettle to boost the temperature to make the insulating reaction until the materials are thickened, then the calcium hydroxide, the aliphatic acid and the boric acid are added into make an insulating reaction, a temperature rise, an insulating dehydration and a refining in turn, then the materials are moved into an intermediate kettle, the antioxidant is added to disperse and homogenize, and the finished product is produced after the filtering. The invention has excellent anti-spray performance, excellent high temperature performance, good extreme pressure anti-abrasion performance, prominent anti-shear performance, good pumping performance, anti-rust performance and water adding shear stability; has apparent phase inversion effect and good product performance, decreases the grease exchange times under the same working condition and increases the service life of the equipment, which is proved by the trial applications of a plurality of appliance manufacture enterprises, steel works, paper mills and so on.

A strut (12) is configured for an active suspension system (142) which provides electronic control for both the force applied by the strut (12) and the dampening characteristics of the strut (12). A compressible fluid (18) is used within the strut (12), and preferably includes a compressible base fluid and electromagnetic field responsive particles (132) which are suspended in the compressible base fluid. The electromagnetic field responsive particles (132) are preferably closely matched in density and modulas of elasticity to that of the compressible base fluid to prevent sedimentation of the particles (132) and to maintain the elasticity of the compressible fluid (18). The amount compressible fluid (18) within the strut (12) is electronically controlled to determine the force applied by the strut (12) and a field strength applied to the compressible fluid in a fluid flow passage is electronically controlled to determine the dampening characteristics of the strut (12).

The present invention relates to processes for preparing a stable suspension of carbon nanoparticles in a thermal transfer fluid to enhance thermal conductive properties, viscosity, and lubricity. One process is to disperse carbon nanoparticles directly into a thermal transfer fluid and other additives in the present of surfactants with intermittent ultrasonication. The second process is carried out in three stages. First, carbon nanoparticles are dispersed into a volatile solvent. Then, a thermal transfer fluid, surfactants, and other additives are added into this intermediate dispersion and mixed thoroughly. At last, the volatile solvent is removed to produce a uniformly dispersed nanofluid. The third process is to disperse carbon nanoparticles at an elevated temperature into a homogeneous mixture of surfactants and other additives in a thermal transfer fluid with help of a physical agitation. The present invention also relates to compositions of carbon nanoparticle nanofluids, such as nanolubricants and nanogreases. The nanofluid of the present invention is a dispersion of carbon nanoparticles, particularly carbon nanotubes, in a thermal transfer fluid in the present of surfactants. Addition of surfactants significantly increases the stability of nanoparticle dispersion. For nanogreases, carbon nanoparticles function both as a thickener to modulate viscosity and as a solid heat transfer medium to enhance thermal conductivity and high temperature resistance.

The invention discloses a microemulsion metal cutting fluid which contains 1-20 wt% of fatty oil, 1-40 wt% of emulsifier, 5-40 wt% of co-emulsion, 5-30 wt% of wear and rust inhibitor, 1-20 wt% of penetrant, 5-30 wt% of pH regulator, 0.5-5 wt% of defoaming agent and 0.1-5 wt% anticorrosive bactericide. The microemulsion metal cutting fluid has excellent lubricating, antiwear, antirust, cleaning and cooling properties, and can be widely used in precise cutting work of ferrous metals and nonferrous metals.

The present invention relates to a nanofluid that contains carbon nanoparticles, metal oxide nanoparticles and a surfactant in a thermal transfer fluid. The present invention also relates to processes for producing such a nanofluid with enhanced thermal conductive properties.

The structural member of the present invention comprises (A) a layer which comprises a fluorine-containing polymer and does not contain an adhesive material other than the fluorine-containing polymer substantially and (B) a substrate, in which the layer (A) is adhered directly to the substrate (B) without interposing a binder therebetween and a longitudinal shear strength between the layer (A) comprising a fluorine-containing polymer and the substrate (B) is not less than 0.98 N / mm<2 >at 150° C. The structural member comprising a fluorine-containing polymer and a substrate adhered to each other, particularly the structural member having improved adhesive strength at high temperature and the sliding material produced by using the structural member are provided.

The invention relates to a lubricating grease, comprising 40-95 wt% of a lubricating base oil, 1-59 wt% of a composite zirconium based densifier and 1-59 wt% of hexapolyurea; and the composite zirconium based densifier is a compound zirconium soap generated from reaction of higher aliphatic acid, aromatic acid, water and zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the following steps: subjecting the zirconium alkoxide, higher aliphatic acid and aromatic acid to a first contact reaction in lubricating base oil at 60-120 DEG C; then subjecting the mixture obtained from the first contact reaction and water to a second contact reaction at 85-100 DEG C, and heating the products obtained from the second contact reaction for dehydration; and introducing the hexapolyurea into the obtained reaction products. The lubricating grease provided by the invention has high drop point, excellent colloidal stability, and excellent extreme pressure wear resistance and ball bearing lubrication life.

Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II):wherein:R is —H or a substituted or unsubstituted alkyl, acyl or aryl group;Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group;Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group;Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group;n is an integer equal to or greater than 2; andp is an integer equal to or greater than 0.The invention also includes methods of using and preparing these polymers.

An oil-conditioning filter, for use with an internal combustion engine, includes a filter element and an additive cartridge, for gradually dispensing an oil additive over time. The additive cartridge has a beneficial oil-conditioning agent contained therein. Placement of the cartridge allows for fluid filtration through the filter element before fluid communication with the additive of the additive cartridge. An additive dispersing member is also described.