Visosity index improver
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United States of America Patent
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Nov 26, 1991
Grant Date -
N/A
app pub date -
Oct 12, 1989
filing date -
Oct 12, 1989
priority date (Note) -
Expired
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Abstract
Degraded molecular weight copolymers of ethylene alpha-olefin are provided. The ethylene alpha-olefin copolymers, before degradation, are characterized by having a narrow molecular weight distribution and are comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains. The degraded copolymers are useful as viscosity index improvers for oils.
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