摘要:
Heavy fractions of paraffinic lubes produced over dewaxing catalysts are effective as wax crystal modifiers for being hydrocarbons notwithstanding that such heavy fractions have pour points above that of the liquid hydrocarbon.
摘要:
An ethylene/α-olefin copolymer, which: (1) comprises 30 to 80% by mol ethylene and 20 to 70% by mol C3 to 10 α-olefin; (2) has a number-average molecular weight (Mn), as determined by gel permeation chromatography (GPC) of 500 to 12,000 and a molecular weight distribution (Mw/Mn) of 3 or less; (3) has a kinetic viscosity at 100°C of from 10 to 5,000 mm 2 /s; (4) has at least one unsaturated bond at a molecular terminal of at least 95% of the polymer chains; and (5) has a B value, as determined by formula (I), of from 1.0 to 2.0: B = P OE / 2 P O . P E
wherein P E is the molar fraction of the ethylene unit in the copolymer, P O is the molar fraction of the α-olefin unit in the copolymer, and P OE is the proportion of the number of α-olefin/ethylene sequences to the number of all the dyad sequences in the copolymer.
摘要:
A sliding member used in a chain system of an automotive internal combustion engine and made of a resin composition. The resin composition includes a matrix resin which is a thermoplastic resin having a number average molecular weight of not less than 20000; and a fluororesin in an amount ranging from 5 to 40 % by mass based on a total amount of the resin composition, the fluororesin having a surface energy ranging from 200 to 400 µN/cm and a visible light transmittance of not less than 10% at a wavelength of 600 nm.
摘要:
For lubrication of a reduction gear, at least a Ca sulfonate additive is added to a lubricating grease made by an urea compound as a thickener and a synthetic hydrocarbon oil as a base oil.
摘要:
A cracked liquid copolymer of ethylene and an olefin, said copolymer being characterized by: (a) mol% of ethylene from 10 to 75 %; (b) number average molecular weight of (c) molecular weight distribution of (d) random monomer distribution; and (e) a head-to-tail molecular structure; a process for the production of cracked copolymer; a hydrogenated cracked copolymer; and a lubricant oil comprising a cracked liquid copolymer of ethylene and an olefin or a hydrogenated cracked copolymer as the base oil and an effective amount of at least one oil additive.
摘要:
A lubricating coating composition in which at least one basic lubricant selected from a basic sulfonate, a basic salicylate, and a basic phenate is dissolved in a volatile solvent is applied to the frictional surface of a box and a pin constituting a threaded joint for oil well pipes. The composition may further contain one or more of a thermoplastic resin powder, another lubricant, and an extreme pressure agent. The surface roughness of the frictional surfaces preferably has an Rmax in the range of 5 - 40 micrometers.
摘要:
The present invention relates to a lubricant composition for a high temperature of which the amount evaporated in a thin film at a high temperature is controlled and of which the fluidity is maintained for a long period of time, and it is a lubricant composition for a high temperature which is obtained by mixing a base oil composition comprising (a) 20 to 100% by weight of a specific aromatic ester and (b) 0 to 80% by weight of another base oil with (c) 0.1 to 10% by weight, based on the total amount of the lubricant composition, of an antioxidant.
摘要:
A lubricating oil suitable for machinery which may come into incidental contact with food is described, which contains a food grade base oil and a combination of food grade additives including a thickener, an antioxidant, a rust inhibitor, an anti-wear additive, an antifoamant, optionally a metal passivator, and 0.2 wt% or less coupling agent. The lubricating oil exhibits good resistance to wear, oxidation and rust, and reduced sludging at equipment surface temperatures of about 200°F and higher.
(1) comprises 30 to 80% by mol ethylene and 20 to 70% by mol C3 to 10 α-olefin; (2) has a number-average molecular weight (Mn), as determined by gel permeation chromatography (GPC) of 500 to 12,000 and a molecular weight distribution (Mw/Mn) of 3 or less; (3) has a kinetic viscosity at 100°C of from 10 to 5,000 mm 2 /s; (4) has at least one unsaturated bond at a molecular terminal of at least 95% of the polymer chains; and (5) has a B value, as determined by formula (I), of from 1.0 to 2.0: B = P OE /(2P O .P E ) wherein P E is the molar fraction of the ethylene unit in the copolymer, P O is the molar fraction of the α-olefin unit in the copolymer, and P OE is the proportion of the number of α-olefin/ethylene sequences to the number of all the dyad sequences in the copolymer.
摘要:
Disclosed are hydrophobic compositions useful for filling the voids within jacketed optical fiber cables. The compositions include about 85 to 95 parts by weight of mineral oil, 5 to 15 parts by weight of a (styrene) - (ethylene/propylene) diblock copolymer having a styrene: (ethylene/propylene) ratio of 37.5:62.5 to 27.5:72.5 and a specific gravity of about 0.90 to 0.95, optional antioxidant, and optional metal deactivator.