摘要:
A liquid polymer suitable for use as a lubricant base oil is produced by polymerizing ethylene and at least one alpha-olefin using a metallocene catalyst to provide a polymer which is then isomerized and hydrogenated to produce the liquid polymer.
摘要:
A polymer comprising one or more vinylidene olefins, wherein the polymer is obtained in the presence of a single-site catalyst comprising a compound of a transition metal of Group IVb of the Periodic Table and an aluminoxane; and a lubricant oil comprising said polymer as the base oil and an effective amount of at least one oil additive.
摘要:
A process for the production of a hydroisomerized hydrocarbon product of an ethylene-olefin polymer, comprising the steps of:
(a) polymerizing ethylene and a first olefin in the presence of a single-site catalyst comprising a compound of a transition metal of Group IVb of the Periodic Table and an aluminoxane to produce a precursor polymer; and (b) hydroisomerizing at least a portion of said precursor polymer to produce a hydroisomerized hydrocarbon product; a hydroisomerized hydrocarbon product produced by said process, wherein the bromine number of the hydroisomerized hydrocarbon product ranges from about 0.04 to about 1.5; and a lubricant oil comprising said hydroisomerized hydrocarbon product as the base oil and an effective amount of at least one oil additive.
摘要:
A lubricant composition for ball joints exhibits excellently low friction not only at ordinary temperatures but also from higher to lower temperatures, and will not leak out of ball joints at higher temperatures. A ball joint has the lubricant composition sealed therein. The lubricant composition contains a base oil including a synthetic hydrocarbon oil, a thickener, and a fatty acid salt of a compound represented by the formula (1):
R 1 -NH-R 2 -NH 2 (1)
(R 1 : hydrocarbon group of C1 to C24; R 2 : alkylene group of C2 to C4).
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.
摘要:
Various vinylidene-containing polymers are obtained in the presence of a single-site catalyst. For example, the polymers include ethylene/isobutene copolymer, ethylene/propylene/isobutene terpolymer, ethylene/styrene/isobutene terpolymer, ethylene/α-methyl-styrene/sobutene terpolymer, propylene/isobutene copolymer, styrene/isobutene copolymer, and α-methyl-styrene/isobutene copolymer. These polymers may be used to formulate lubricant oils.
摘要:
A polymer comprising one or more vinylidene olefins, wherein the polymer is obtained in the presence of a single-site catalyst comprising a compound of a transition metal of Group IVb of the Periodic Table and an aluminoxane; and a lubricant oil comprising said polymer as the base oil and an effective amount of at least one oil additive.
摘要:
This invention relates to an ultrahigh-molecular polyethylene sheet produced by extruding polyethylenic material comprising an ultrahigh-molecular polyethylene of a viscosity-average molecular weight of 0.3 to 2 million into a 100 to 300 νm thick sheet.