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 is a block copolymer having at least a hard block and at least a soft block. The soft block comprises a higher amount of comonomers than the h...

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Bibliographic Details
Main Authors HUGHES MORGAN M, CHEUNG YUNWA W, RATH GARY L, WALTON KIM L
Format Patent
LanguageEnglish
Published 16.02.2010
Subjects
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
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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 is a block copolymer having at least a hard block and at least a soft block. The soft block comprises a higher amount of comonomers than the hard block. The block copolymer has a number of unique characteristics disclosed here. Such block copolymers offer the possibility of improved low temperature performance and flexibility in formulating motor oil, gear lubricants and greases, etc.
Bibliography:Application Number: US20060376834