Low molecular weight ethylene/alpha-olefin interpolymer as base lubricant oils

A lubricant composition comprises an ethylene/alpha-olefin interpolymer having a number average molecular weight of less than 10,000 g/mol as a base oil and at least one oil additive. The ethylene/alpha-olefin interpolymer has at least one molecular fraction which elutes between 40° C. and 130° C. w...

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Bibliographic Details
Main Authors HUGHES MORGAN M, RATH GARY L, CHEUNG YUNWA W, WALTON KIM L
Format Patent
LanguageEnglish
Published 07.09.2006
Subjects
CHEMISTRY
FUELS
LUBRICANTS
LUBRICATING COMPOSITIONS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Summary:A lubricant composition comprises an ethylene/alpha-olefin interpolymer having a number average molecular weight of less than 10,000 g/mol as a base oil and at least one oil additive. The ethylene/alpha-olefin interpolymer has at least one molecular fraction which elutes between 40° C. and 130° C. when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/alpha-olefin interpolymer.
Bibliography:Application Number: US20060376774