Methacrylate pour point depressants and compositions
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United States of America Patent
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-
Jul 4, 1989
Issued Date -
N/A
app pub date -
Oct 13, 1988
filing date -
Aug 19, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pour point depressant for lubricating oils comprises a poly(methacrylate) polymer having the repeating unit ##STR1## wherein R is an alkyl group having an average chain length in the polymer of 12.6 to 13.0, and n is an integer indicating the number of repeating units, the value of n being sufficient to provide a molecular weight of 10,000 to 300,000 for the polymer, the pour point depressant having the capacity to reduce the stable pour point to -35.degree. C., while being compatible with other additives such as viscosity index improvers.
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