Abstract:
Trenn- und Schmiermittel in fester Form zur Warmmetallverarbeitung, insbesondere zum Warmblech- und Profilwalzen oder zur Schmierung von Dornstangen bei der Herstellung nahtloser Rohre. Das fest Trenn- und Schmiermittel enthält im wesentlichen ein thermoplastisches Polymer und/oder Copolymer und ein Gleitmittel für Kunststoffe. Weitere Zusätze, wie Festschmierstoffe, sind möglich. Der Erweichungspunkt liegt bei 20 bis 250°C, der Schmelzpunkt bei 30 bis 300°C und die Shore-D-Härte bei 20°C bei 20 bis 80.
Abstract:
A precoat composition including a particulate vitreous material and a particulate lubricant material (graphite and or boron nitride) dispersed in an organic medium comprising a solution of a polymeric binder is applied to the workpiece, and the workpiece is heated to a temperature (1000 to 1400°F) sufficient to remove (538 to 760°C) the organic medium and leave a residue of vitreous material and lubricant material on the workpiece. The workpiece is then inserted in a heated split die at 1350 to 1750°F and the die loaded to alter the shape (752°C to 960°) of the workpiece. The ratio of the lubricant material to the vitreous material is at least 1:1 and the particle size of the lubricant material and the vitreous material is not more than 200 mesh (U.S. Series), this being important for the surface quality of the shaped workpiece.
Abstract:
Method and System of lubricating at least one moving part with a medium. The medium includes a dissolved mixture of lubricant and compressed gas. The amount of lubricant and compressed gas may be controlled in forming the dissolved mixture in response to input conditions. A user and/or external factors may be used to determine the input conditions. In response to the input conditions the amount of lubricant and compressed gas is delivered to the moving part that is housed in a pressurized chamber. The properties of the dissolved mixture can be adjusted, whereby the properties may include, but are not limited to, the following: viscosity, temperature, and thermal conductivity. This adjustment to the gas may be accomplished, for example, by releasing gas from the pressurized chamber in an amount to adjust the properties. In a further approach, lubricant may be scavenged from the pressurized chamber by returning surplus lubricant to its original source or other designated location.
Abstract:
PCT No. PCT/CA97/00658 Sec. 371 Date Jun. 22, 1999 Sec. 102(e) Date Jun. 22, 1999 PCT Filed Sep. 11, 1997 PCT Pub. No. WO98/13445 PCT Pub. Date Apr. 2, 1998The present invention relates to novel lubricant compositions comprising a solid lubricant and a binding agent in water medium suitable for lubricating steel-steel interfaces such as tractor-trailer couplings, rail-wheel systems and other heavy duty applications. The invention also relates to compositions described above which include friction modifiers with high or very high and positive coefficients of friction such that the coefficient of friction is considerably higher than the solid lubricant. The invention further relates to compositions comprising a binding agent and a friction modifier with a very high and positive coefficient of friction in a water medium.
Abstract:
A lubricant for refrigerating machines with the use of an ammonia refrigerant which comprises at least one polyether represented by the general formula (I): X{-O-(AO)n-H}p, wherein X represents a residue obtained by eliminating hydroxyl from a monool or a polyol; (AO)n is formed by the copolymerization of EO with AO having at least 3 carbon atoms; n is a number of 2 or more; and p represents the valence of X; wherein, among the hydroxyl groups at the terminal structure, secondary hydroxyl groups amount to at least 50 % of the total hydroxyl groups; or a polyether represented by the general formula (II): X{-O-(AO1)a-(AO2)b-H}p, wherein X represents a residue obtained by eliminating hydroxyl from a monool or a polyol; (AO1)a represents polyoxyalkylene formed by the copolymerization of ethylene oxide and propylene oxide and/or butylene oxide; (AO2)b represents oxyalkylene having at least 3 carbon atoms; a is a number of 2 or more; b is a number of 1 or more; and p represents the valence of X.
Abstract:
A refrigerating machine oil for a carbon dioxide refrigerant according to the present invention contains polyalkylene glycol represented by the following general formula (1):
R 1 {-(OR 3 ) n -OR 2 } m (1)
[where R 1 represents a residue obtained by removing m hydroxyl groups from an organic compound having three to ten hydroxyl groups, R 2 hydrogen, an alkylene group of one to five carbons, or an acyl group of one to five carbons, R 3 an alkylene group of two to four carbons, m an integer of 3 to 10, and n such an integer that a number average molecular weight of the polyalkylene glycol (1) becomes 500 to 3000], wherein a kinematic viscosity at 100°C of the polyalkylene glycol is 5-20 mm 2 /s.