Derivatized solid sheared polymer blends and process for their preparation
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United States of America Patent
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Jul 3, 2001
Issued Date -
N/A
app pub date -
Jan 8, 1998
filing date -
Aug 2, 1993
priority date (Note) -
Expired
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Abstract
A derivatized blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and then reacted with an organic compound to derivatize the blend. The sheared derivatized blend of polymers can function as a shear stable multifunctional viscosity index improver with improved low temperature properties and, in some cases, dispersancy antioxidant and anti-wear properties.
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