Abstract:
A grease composition suitable as a lubricating sealant which is resistant to aprotic solvents such as chloroform and carbon disulfide comprises glycerine, fumed silica, polyethylene glycol and a minor amount of water. A preferred grease composition is one in which the amount of glycerine ranges is from 50 to 95 weight % of the total composition, the amount of fumed silica is from 1 to 25% by weight of the total composition, the amount of polyethylene glycol ranges is from 0.5% to 50% by weight of total composition and the amount of water is from 0.01% to 1.0% by weight of total composition, the total composition amounting to 100%.
Abstract:
Asbestiform crystalline calcium M phosphate, where M is sodium or lithium, typically having a length to average diameter ratio of at least 5:1, can be prepared by forming a melt of a source of oxygen, calcium, phosphorus and M having a mole ratio of about 15 percent to about 30 percent M 2 0, about 48 percent to about 60 percent P 2 O 5 and about 20 percent to about 37 percent CaO, cooling the melt within the range of about 500°C. to about 750°C. for a sufficient time to permit blocks of calcium M phosphate to form, and fiberizing the blocks into the asbestiform crystals. Such asbestiform crystalline calcium M phosphates are useful to prepare composites of organic polymeric materials.
Abstract translation:石棉状结晶钙中号磷酸盐,其中M是钠或锂,典型地具有的长度至少为5的平均直径之比为2:1,可以通过形成的氧,钙,磷源的熔体和具有摩尔比M来制备 的约15%至约30%的M 2 O,约48%至约60%的P 2 O 5和大约20%至约37%的CaO,将熔融物冷却约500℃的范围内,以约750℃足够长的时间 以允许钙磷酸盐的块,以形成和纤维化块到石棉状晶体。 搜索石棉状晶形钙中号磷酸盐是制备有机聚合物材料的复合材料是有用的。
Abstract:
The invention concerns an anti-friction lacquer (11, 12, 41, 42, 43) and anti-friction laminate (10) comprising at least 25 vol.% of a binding agent (16) and fillers comprising zinc sulphide (18) and barium sulphate (20) and optionally other fillers, the volume ratio of zinc sulphide (18) to barium sulphate (20) being between 0.1 and 15.7, preferably between 0.8 and 4.88 and most preferably between 1.5 and 3.44. The anti-friction laminate (10) comprises at least two anti-friction lacquers (11, 13) such as this and of differing compositions. The invention also concerns anti-friction laminates containing lacquers such as this and the use thereof in combustion engines.
Abstract:
The present invention provides a new composite material comprising a porous matrix made of metal, metal alloy or semiconducting material and hollow fullerene-like nanoparticles of a metal chalcogenide compound or mixture of such compounds. The composite material is characterized by having a porosity between about 10% and about 40%. The amount of the hallow nanoparticles in the composite material is 1-20 wt. %.
Abstract:
The present invention provides a new composite material comprising a porous matrix made of metal, metal alloy or semiconducting material and hollow fullerene-like nanoparticles of a metal chalcogenide compound or mixture of such compounds. The composite material is characterized by having a porosity between about 10% and about 40%. The amount of the hallow nanoparticles in the composite material is 1-20 wt. %.
Abstract:
Disclosed are grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder having a bimodal particle size distribution as well as grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder and a solid fluorinated polymer.
Abstract:
According to the method of the invention, first a paste is produced from a plastics dispersion and fillers in order to form the plastics sliding layer. This paste is free from organic solvents and is applied to a sintered porous metal layer. The resultant multi-layer material is then sintered. Since organic solvents are not used, the risks to health and the risk of fire are considerably reduced. Furthermore, the composite materials produced according to the invention have exceptional resistance to cavitation. In addition to conventional fields of application relative to lubrication-free articles, such as bearings, these composite materials can therefore also be used in gear pumps and shock absorbers.
Abstract:
A solid film lubricant system for protecting metal wear interfaces subject to high temperatures and wet lubrications, comprising an oil-attracting solid lubricant mixture with at least two elements selected from the group of graphite, MoS2 and BN; a support (i.e., hard lands or hard sublayer) for the mixture to loads of at least 10 psi at temperatures of 600 DEG -800 DEG F. while being thermally stable; a thermally stable thermoset polymer matrix adhering the mixture to the support or the wear surface, the polymer having inherent hydrocarbon chemical attraction to form a tenacious oil film of the lubricating oil on the wearing surface. A method of making anti-friction coated surfaces comprising providing a light metal based cylinder surface (i.e., metal base or alloys of aluminum, titanium, or magnesium); exposing nonoxidized metal of the surface; applying a high elastic modulus load-supporting metal layer onto at least portions of the light metal cylinder surface; and simultaneously distributing a solvent-based solid film lubricant mixture and thermoset polymer onto at least portions of the layer at about room temperature to form a coating of desired thickness. An engine block with one or more anti-friction coated cylinder bore surfaces, comprising a hard, load-supporting face on the bore surface; and a coating on the face comprised of an oil-attracting solid lubricant mixture and a thermoset polymer that supports loads of at least 10 psi at temperatures of 600 DEG -800 DEG F. and is stable at such temperatures.
Abstract:
A rheologically controlled glass lubricant for hot metal working comprises a glass powder, a binder, a rheological agent, and a weetting and viscosity modifier. These materials may be dispersed in a carrier. The lubricant is made by mixing the constituent elements, milling the mixture, and stabilizing the milled mixture. The lubricant can be used in a forging operation by coating a metal part with the lubricant, heating the coated part, placing the coated heated part in a forge, and rapidly applying sufficient pressure to deform the coated metal part into a desired shape.