Multifunctional viscosity index improver containing phenothiazine
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United States of America Patent
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Jan 4, 1994
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N/A
app pub date -
Aug 24, 1990
filing date -
Aug 24, 1990
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Expired
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Abstract
Multifunctional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted with an unsaturated reactive monomer and thereafter reacted with amino alkylphenothiazine.
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