Novel ethylene alpha-olefin copolymer substituted Mannich base lubricant dispersant additives
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United States of America Patent
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May 21, 1991
Grant Date -
N/A
app pub date -
Aug 1, 1988
filing date -
Aug 1, 1988
priority date (Note) -
Expired
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Abstract
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl-moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of 300 to 10,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.
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