Showing papers on "Grease published in 2004"

Grease composition and rolling device

Abstract: A grease composition that maintains low torque over a wide temperature range from low temperature to high temperature, realizing low tendency of white texture peeling. In particular, a grease composition characterized in that it comprises a base oil of 20 to 50 mm2/s kinetic viscosity at 40°C mixed with 8 to 30 mass%, based on the whole amount of grease, of urea compound as a thickener and further loaded with at least one anticorrosive additive selected from among carboxylic acid and carboxylic acid salt and ester anticorrosive agents in a single addition amount of 0.1 to 10 mass% based on the whole amount of grease or a total addition amount of 0.1 to 15 mass% based on the whole amount of grease. Further, there is provided a rolling device wherein the grease composition is sealed to thereby realize low torque, low tendency of white texture peeling and high durability.

Continuous production of ethyl esters of grease using an immobilized lipase

Abstract: The continous production of ethyl esters of grease using a phyllosilicate sol-gel immobilized lipase from Burkholderias cepacia (IM BS-30) as catalyst was investigated. Enzymatic transesterification was carried out in a recirculating packed-column reactor using IM BS-30 as the stationary phase and ethanol and restaurant grease as the substrates without solvent. The bioreactor was operated at various temperatures (40–60°C), flow rates (5–50 mL/min), and times (8–48 h) to optimize ester production. Under the optimal operating conditions (flow rate, 30 mL/min; temperature, 50°C; mole ratio of substrates, 4∶1 ethanol/grease; reaction time, 48 h), the ester yields were >96%. The IM BS-30 could be reused in the reactor for continous ester production. The conversion of grease to ester was monitored by HPLC and GC, whereas free and total glycerol content in the product was determined by GC. Either water-washing or silica column chromatography reduced the free and total glycerol content of the ethyl ester preparation to acceptable levels.

Influence of Cage Clearance on Bearing Lubrication

Abstract: The effect of the cage clearance on the lubricant supply and elastohydrodynamic (EHL) film thickness has been studied in a ball-on-disc device. A single pocket from a standard nylon cage was mounted around the ball. The cage was instrumented so that the clearance between the cage and ball could be altered. Film thickness measurements were made with and without the cage present and for different clearances. Two lubricants were tested: a lithium hydroxystearate grease and its base oil. Film thickness was measured with increasing speed to determine the onset of lubricant starvation. Without a cage present the grease lubricated contact starved at a very low speed, typically 0.02 m/s and the film thickness dropped to a fraction of the fully flooded value. Starvation did not occur within the speed range for the base oil. The presence of the cage significantly changed the starvation response. For the base oil reducing the clearance induced starvation by locally removing the lubricant from the track. The grease g...

Bioremediation of vegetable oil and grease from polluted wastewater using a sand biofilm system

Abstract: Pseudomonas sp. (L1), P. diminuta(L2) were among eight bacterial strains isolated from vegetable grease and oil-contaminated industrial wastewater, four of which only were found to have the ability to degrade oil and grease. They were identified and investigated for oil and grease degradation either individually or in combinations in previous unpublished work by the authors. Since the combination M1 (Pseudomonas sp. andP. diminuta) produced the highest degradative activity, it was used in the present study in a biofilm sand filter system for vegetable oil and grease removal. This system was tested either as one unit or two units in sequence where different flow rates (30, 50, 100 ml/h) were applied compared to a control unit(s). Results showed that both biofilm systems reduced oily wastewater, even in cases of high degree of pollution (fat, oil & grease (FOG), 7535 ppm; biochemical oxygen demand (BOD5), 525 ppm; chemical oxygen demand (COD), 1660 ppm). Results also showed a removal of FOG with efficiency at 100%; BOD5 at 95.9% and COD at 96%, at 50 ml/h flow rate using one unit of biofilm system. On using two units in sequence, a complete removal of FOG, BOD5 and COD with efficiency 100%, at flow rate 100 ml/h was achieved. In conclusion, the previous biofilm results indicated the efficiency of such a system in treating oily polluted wastewater (vegetable oil origin) on the basis of bacterial isolates being used, the optimum flow rate, and the number of biofilm units used in sequence to obtain the highest removal capacity of such a system.

Thermally conductive grease and methods and devices in which said grease is used

Abstract: A grease includes: (A) 2 to 50 weight %, based on the weight of the grease, of a polyorganosiloxane having an average, per molecule, of at least one silicon-bonded hydrocarbonoxy-functional group; and (B) 50 to 98 weight %, based on the weight of the grease, of at least one thermally conductive filler. The grease may be used as a thermal interface material for dissipating heat from electronic devices.

Functionalized polymer composition for grease

Abstract: A grease composition containing: (a) the reaction product of: (i) a calcium containing overbased organic acid; and (ii) at least one acid producing compound or derivatives thereof selected from the group consisting of: (1) a non-polymeric hydrocarbyl substituted dicarbonyl derivative selected from the group consisting of an acid, an ester, a salt, an anhydride, ester-acid, acid-salt and mixtures thereof; (2) a copolymer derived from monomers containing (1) an olefin; and (2) an unsaturated dicarboxylic acid anhydride or derivatives thereof; and (3) an inorganic acid containing about 2 or more acidic hydrogens; and (b) an oil of lubricating viscosity, wherein the overbased calcium sulphonate contains colloidally dispersed calcium carbonate is selected from the group consisting of calcite, vaterite and mixtures thereof. The invention further relates to the process to make the composition and its use in greases to increase water resistance.

Food-grade-lubricant

Abstract: The present invention discloses an improved food-grade-lubricant useful as hydraulic oil, circulating oil, drip oil, general purpose oil, grease base oil, cable oil, chain oil, spindle oil, gear oil, and compressor oil for equipment in the food service industry. The lubricant comprises at least one vegetable oil, at least one polyalphaolefin, and at least one antioxidant. The lubricant has improved properties when subjected to thermal and mechanical stress.

Grease composition for resin lubrication and electrically operated power steering unit

Abstract: A grease composition for resin lubrication that can maintain excellent sliding lubrication between a resin member and a metal member and between metal members for a prolonged period of time. In particular, a grease composition for resin lubrication characterized by comprising a base oil, a thickening agent and at least one wax selected from among nonpolar waxes and polar waxes. The grease composition for resin lubrication is applied to telescopic rods for vehicle steering and electrically operated power steering units to thereby attain durability enhancement and service life prolongation.

Method and device for cooling and lubricating rollers on a rolling stand

Abstract: The invention relates to a method and a device for cooling and/or lubricating rollers, in particular the working rollers ( 2, 3 ) on a rolling stand and a rolled strip ( 1 ), rolled between the above rollers and transported onwards, using water in the form of spray jets ( 4, 5 ) as cooling medium and oil, oil/water mix, oil/water mix, oil/air/water mix or grease mixtures as lubricant. In order to improve the lubricating and cooling effects, a combined application of super-cooling the strip and roller surfaces and roller lubrication on the input side of the stand is disclosed, in which both media, water and lubricant, are separately fed to the rollers ( 2, 3 ) and the rolled strip and applied to the roller surface at different application points. Separate reservoirs for water and lubricant and separate lines to the spraying bar ( 11 ) for water and the spraying bar ( 12 ) for the lubricant are provided.

Grease removal system

Abstract: A grease removal system includes a solid interceptor fluidly coupled to a grease trap tank, which is fluidly coupled to a secondary tank. The secondary tank contains an enzyme solution which biodegrades the grease. The grease removal system may also include a solid interceptor fluidly coupled to a grease trap tank which is fluidly coupled to a replaceable container. Grease is diverted from the grease trap tank into the replaceable container and thereafter discarded. The grease removal system may include a grease trap tank utilizing a unique arrangement of grease baffles and solids baffles which work together to isolate grease within a single region of the grease trap tank for ease of disposal. Finally, the grease removal system includes two level sensors which detect the level of grease within the grease trap tank and, at the appropriate level direct the accumulated grease from the grease trap tank.

Preparation of soybean oil-based greases: effect of composition and structure on physical properties.

Abstract: Vegetable oils have significant potential as a base fluid and a substitute for mineral oil in grease formulation. Preparation of soybean oil-based lithium greases using a variety of fatty acids in the soap structure is discussed in this paper. Soy greases with lithium−fatty acid soap having C12−C18 chain lengths and different metal to fatty acid ratios were synthesized. Grease hardness was determined using a standard test method, and their oxidative stabilities were measured using pressurized differential scanning calorimetry. Results indicate that lithium soap composition, fatty acid types, and base oil content significantly affect grease hardness and oxidative stability. Lithium soaps prepared with short-chain fatty acids resulted in softer grease. Oxidative stability and other performance properties will deteriorate if oil is released from the grease matrix due to overloading of soap with base oil. Performance characteristics are largely dependent on the hardness and oxidative stability of grease used ...

Heat dissipation structure

Abstract: A heat dissipation structure includes a heat-producing electronic component on a substrate, a thermally conductive case, and grease. The electronic component and the substrate are housed in the case. The grease is provided between the case and the electronic component or the substrate for transmitting heat produced by the electronic component to the case. The case has contact surfaces that contact with the grease. The contact surfaces have free energy equal to or higher than 20 mN/m and roughness equal to or larger than 1.0 μm.

Liquid detergent composition comprising a solubilizing anionic surfactant

Abstract: A liquid detergent composition comprising a limited amount of a solubilizing anionic surfactant for increased speed of cooked grease cleaning and methods of using the same.

Urea grease composition for constant velocity joints

Abstract: Urea grease composition for constant velocity joints, comprising base oil, one or more urea thickener compounds: A) one or more molybdenum sulphurized dialkyldithiocarbamates represented by general formula (I), wherein Rl and R2 are independently chosen from alkyl groups of from 1 to 24 carbons, m + n = 4, m is from 0 to 3 and n is from 4 to 1, B) triphenylphosphorothionate represented by formula (II) and C) one or more stearic acid metal salts.

Grease collection system for oven

Abstract: A grease collection system is provided that may be connected to an oven for the real-time removal of grease from the heating chamber while maintaining a closed system. In particular, one end of a grease removal conduit is placed in communication with a drain in the cooking chamber, and the other end of the conduit is placed in a portable reservoir for the disposal of grease having a predetermined fluid level to prevent ambient air from entering the heating chamber during the preparation of food product.

Grease separator for kitchen sinks and other applications

Abstract: An oil/grease separator (10) that accomodates large volume flows by raising the liquid level in the housing and flowing the floating lighter liquid through the outlet port (28).

Preparation method of polyurea-composite calcium lubricating grease

Abstract: A lubricating polyureas-composite calcium grease is prepared through proportionally mixing basic oil, calcium hydroxide (oxide), water and C1-C20 organic acid together, heating to 30-100 deg.C, adding diisocyanate and organic amine, draining water, saponifying, heating to 210-230 deg.C, cooling and homogenizing. Its advantages are high refractory performance, stability and extreme-pressure antiwear nature.

Grease composition and rolling device obtained using the same

Abstract: PROBLEM TO BE SOLVED: To provide a grease composition which is excellent in not only durability, low-temperature flowability, high-temperature thermal stability, shear stability and storage stability but also performances such as abrasion resistance, peeling resistance, abnormal noise reduction, low torque property, acoustic lifetime, fretting resistance or electrolytic corrosion resistance. SOLUTION: The grease composition comprises 3-95 wt% of a liquid crystalline compound. Preferably, the liquid crystalline compound in the grease composition has a liquid crystallization temperature of not higher than 100°C, an isotropic liquefaction temperature of not lower than 80°C and the difference between the liquid crystallization temperature and the isotropic liquefaction temperature of at least 30°C. COPYRIGHT: (C)2005,JPO&NCIPI

Occupational contact dermatitis from a grease.

Abstract: Background Contact allergy to grease is rare and often not even suspected. We investigated such a case in which the detected allergen was the stabilizer in the grease, which is rarely found as an allergen. Objective Thin-layer chromatography (TLC) was used in a novel way and helped detect the allergen. Methods Patch testing with our standard series, a metal-working series, the different substances individually, the grease in serial dilution and extracts of personal objects, the TLC plate. Gas chromatography-mass spectrometry was also used. Results Test results indicated contact allergy to grease containing N-phenyl-1-naphthylamine and contact allergy to Disperse Orange 1, N-cyclohexyl-N'-phenyl-4-phenylenediamine, N-isopropyl-N'-phenyl-4-phenylenediamine, and N,N'-diphenyl-4-phenylenediamine. Conclusion N-phenyl-1-naphthylamine was the main cause of the patient's dermatitis. This case report underlines the importance of testing the patient's own products and also underlines the benefit of using TLC strips for patch testing and of visiting the workplace to get correct information about exposure conditions.

Grease composition, rolling bearing and electric motor

Abstract: PROBLEM TO BE SOLVED: To provide a grease composition having excellent fretting inhibitive performance, and to provide a rolling bearing scarcely causing fretting, scarcely raising dusts, having small torque, and further having an excellent acoustic lifetime SOLUTION: This grease composition G contains a base oil, a thickening agent, and an additive, wherein the base oil contains an ester oil as a main component, and the thickening agent comprises at least one kind selected from a lithium soap, a lithium composite soap, and a urea compound The rolling bearing is given by filling a bearing space of the rolling bearing 1 with the grease composition The ester oil is contained in the base oil of the grease composition in an amount of ≥50 mass% based on the total amount of the base oil The additive of the grease composition contains a sulfonate salt as an essential component COPYRIGHT: (C)2004,JPO

Lubricant composition and bearing using same

Abstract: A lubricant composition capable of effectively preventing a rolling surface of a bearing from flaking owing to hydrogen embrittlement. The bearing is lubricated with the lubricant composition. The lubricant composition is lubricating oil or grease. The lubricant composition contains a molybdate. The lubricant composition also contains an organic acid salt. At least one molybdate is selected from sodium molybdate, potassium molybdate, and lithium molybdate. The organic acid salt is a sodium salt of an organic acid having one to 20 carbon atoms. 0.01 to 5 wt % of the molybdate is added to the entirety of the lubricant composition. 5 wt % to 70 wt % of the organic acid salt is added to the addition amount of the molybdate. The lubricant composition forms a film containing a molybdenum compound in addition to an iron oxide film on a worn surface of the bearing.

Improved food-grade-lubricant

Abstract: The present invention discloses an improved food-grade-lubricant useful as hydraulic oil, circulating oil, drip oil, general purpose oil, grease base oil, cable oil, chain oil, spindle oil, gear oil, and compressor oil for equipment in the food service industry. The lubricant comprises at least one vegetable oil, at least one polyalphaolefin, and at least one antioxidant. The lubricant has improved properties when subjected to thermal and mechanical stress.

No VOC solvent blend

Abstract: A solvent blend effective to remove grease and oil includes a hydro treated light petroleum distillate in combination with a glycol ether and an ester solvent Each of the components has a vapor pressure of less than 01 mm Hg at 20° C and accordingly contained no volatile organic compounds These effectively remove grease and oil and can be emulsified into water to form an aqueous cleaning composition

Oven with grease collection system

Abstract: An oven with a grease collection system for the real-time removal of grease from the heating chamber while maintaining a closed system. In particular, one end of a grease removal conduit is placed in communication with a drain in the cooking chamber, and the other end of the conduit is placed in a portable reservoir for the disposal of grease having a predetermined fluid level to prevent ambient air from entering the heating chamber during the preparation of food product. The oven may further comprise a drip pan, which might be sloped towards the opening. There may also be a valve disposed in the drain conduit to control the grease flow from the drain to the reservoir. Furthermore a grease level sensor could be provided in the reservoir.

Grease compostion for automobile electrical equipment auxiliary device and prelubricated rolling using the grease composition

Abstract: To provide a grease composition for auxiliary machinery of automobile electrical component containing an aromatic ester oil-containing base oil having a specific diurea compound as a thickener blended therewith and a rolling bearing having the foregoing grease composition packed therein. The foregoing grease composition and rolling bearing do not generate abnormal noises even at an extremely low temperature of −40° C., have excellent seizure resistance even under a high temperature closed to 180° C., have excellent rust preventing performance, and are suitable especially for electrical parts and auxiliary machineries of engines, etc.

Grease base oil

Abstract: PROBLEM TO BE SOLVED: To provide a grease base oil which shows excellent property in a wide temperature range and stably exerts a sufficient lubricity in long-term use, and a lubricant comprising the grease base oil. SOLUTION: The grease base oil comprises an ester of pentaerithritol and carboxylic acid, wherein the carboxylic acid comprises ≥90 mass% total content of 2-ethylhexanoic acid, n-heptanoic acid and n-octanoic acid. The lubricant comprises the grease base oil. COPYRIGHT: (C)2006,JPO&NCIPI

Low cost indoor grease trap

Abstract: An oil/grease removal assembly includes a container having an inlet to receive effluent from a kitchen sink. A drain connection spaced above the container bottom defines a static water level for contained liquid and connects to a sewer. A baffle extends downwardly below the static water level so water can flow below the baffle to the drain, while retaining floating oil/grease. Means intermittently raise the liquid level in the container above the static water level. Floating oil/grease can flow out through a port when the liquid level in the container is raised above the static water level.