Abstract:
Novel anhydrous hydraulic fluid composition comprising: (a) from 65 to 100 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of an alkoxylate compound having the following formula (I), wherein R and R are each hydrogen or an alkyl group having from 1 to 4 carbon atoms; R , R , R , and R are each hydrogen, methyl, ethyl, or OR group, or CH2.-O-R ; R is hydrogen, or an alkyl group having from 1 to 4 carbon atoms; and n is an integer from 1 to 4; (b) from 1 to 35 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of a thickener; and, optionally, (c) from 0 to 10 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of at least one additive selected from the group consisting of lubricity additives, corrosion inhibitors, metal passivators, antioxidants, anti-foam additives, dyes, perfumes and detergents. The novel anhydrous hydraulic fluid compositions not only provide superior fire resistant and high pressure properties, but can also provide superior lubrication. Many of these novel anhydrous hydraulic fluids can also be used in applications where environmentally friendliness is required because of their water solubility, rapid biodegradability, and low aquatic toxicity.
Abstract:
Two-component grease package for lubricating a mechanism (10), which comprises a first component (A) comprising a thickener, and a second component (B) comprising a fluid lubricant, whereby said two-component grease is obtained by mixing together said first and second components ( A and B).
Abstract:
Two-component grease package for lubricating a mechanism (10), which comprises a first component (A) comprising a thickener, and a second component (B) comprising a fluid lubricant, whereby said two-component grease is obtained by mixing together said first and second components ( A and B).
Abstract:
Use as additive to stabilize perfluoropolyether lubricant oils at high temperatures, preferably higher than 200°C, of a solid polymer at room temperature, having a softening or a melting point higher than 150°C, preferably higher than 200°C, and containing in the repeating unit at least one aromatic ring, preferably in the backbone, and lubricating compositions containing said additive.
Abstract:
The invention pertains to a method of forming a lubricating film on a surface, said method comprising applying to a surface a multiphasic composition comprising at least one (per) fluoropolyether (PFPE) lubricant, water and from 0.1 to 3 % by weight of water of at least one thickening agent, said multiphasic composition having a viscosity, when measured at 21 °C at a shear rate of 1 sec -1 of at least 10 Pa*S so as to form a layer, and drying said layer to form a lubricating film. By the use of the multiphasic composition as above detailed it is advantageously possible to convoy the PFPE lubricant to the surface to be lubricated using application techniques (doctor blade, metering rod,...) as those suitable for solid-like greases, while the actual conveyed lubricant behaves in lubrication as an oil, avoiding the use of fluorinated solvents.
Abstract:
The invention pertains to a method of forming a lubricating film on a surface, said method comprising applying to a surface a multiphasic composition comprising at least one (per) fluoropolyether (PFPE) lubricant, water and from 0.1 to 3 % by weight of water of at least one thickening agent, said multiphasic composition having a viscosity, when measured at 21 °C at a shear rate of 1 sec -1 of at least 10 Pa*S so as to form a layer, and drying said layer to form a lubricating film. By the use of the multiphasic composition as above detailed it is advantageously possible to convoy the PFPE lubricant to the surface to be lubricated using application techniques (doctor blade, metering rod,...) as those suitable for solid-like greases, while the actual conveyed lubricant behaves in lubrication as an oil, avoiding the use of fluorinated solvents.
Abstract:
A method for forming a thickened lubricant, such as a grease, comprises forming polymer fibres having a diameter between 50 nanometres and 10 microns, more preferably between 100 nanometres and 1 micron, and depositing the polymer fibres into a lubricating fluid. The polymer fibres may be immediately deposited into the lubricating fluid upon being formed, such that the polymer fibres remain un-adhered to each other and the lubricating fluid rapidly cools the polymer fibres. A thickened lubricant formed according to this method is also disclosed.
Abstract:
Use as additive to stabilize perfluoropolyether lubricant oils at high temperatures, preferably higher than 200°C, of a solid polymer at room temperature, having a softening or a melting point higher than 150°C, preferably higher than 200°C, and containing in the repeating unit at least one aromatic ring, preferably in the backbone, and lubricating compositions containing said additive.
Abstract:
Novel anhydrous hydraulic fluid composition comprising: (a) from 65 to 100 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of an alkoxylate compound having the following formula (I), wherein R and R 5 are each hydrogen or an alkyl group having from 1 to 4 carbon atoms; R 1 , R 2 , R 3 , and R 4 are each hydrogen, methyl, ethyl, or OR 6 group, or CH 2 .-O-R 6 ; R 6 is hydrogen, or an alkyl group having from 1 to 4 carbon atoms; and n is an integer from 1 to 4; (b) from 1 to 35 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of a thickener; and, optionally, (c) from 0 to 10 percent by weight, based on the total weight of the anhydrous hydraulic fluid composition, of at least one additive selected from the group consisting of lubricity additives, corrosion inhibitors, metal passivators, antioxidants, anti-foam additives, dyes, perfumes and detergents. The novel anhydrous hydraulic fluid compositions not only provide superior fire resistant and high pressure properties, but can also provide superior lubrication. Many of these novel anhydrous hydraulic fluids can also be used in applications where environmentally friendliness is required because of their water solubility, rapid biodegradability, and low aquatic toxicity.