Dispersant and antioxidant VI improvers based on olefin copolymers containing phenothiazine and aromatic amine groups
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United States of America Patent
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Aug 24, 1999
Grant Date -
N/A
app pub date -
Jul 1, 1992
filing date -
Jul 1, 1992
priority date (Note) -
Expired
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Abstract
Multifunctional viscosity index improvers for lubricating oils based on a hydrocarbon polymer holding pendant functional groups containing phenothiazine, and pendant functional groups containing aromatic amine antioxidant.
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