Viscosity index improver for lubricant compositions

A lubricant composition comprises a base oil and a viscosity modifier including an ethylene/alpha-olefin interpolymer. The ethylene/alpha-olefin interpolymer has at least a hard segment and at least a soft segment. The soft segment contains a higher amount of comonomers than the hard segment. The ha...

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Bibliographic Details
Main Authors HUGHES MORGAN M, KENNY PAMELA J, RATH GARY L, CONG RONGJUAN, LI PI SHAN COLIN, KUHLMAN ROGER L
Format Patent
LanguageEnglish
Published 16.07.2013
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 a base oil and a viscosity modifier including an ethylene/alpha-olefin interpolymer. The ethylene/alpha-olefin interpolymer has at least a hard segment and at least a soft segment. The soft segment contains a higher amount of comonomers than the hard segment. The hard segment has low crystallinity. The copolymer has a number of unique characteristics disclosed herein. Such copolymers offer the possibility of improved low temperature performance and flexibility in formulating motor oil, gear lubricants and greases, etc.
Bibliography:Application Number: US20080668797