Alkyl (meth) acrylate copolymers
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United States of America Patent
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Issued Date -
May 13, 2004
app pub date -
Nov 11, 2002
filing date -
Nov 11, 2002
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Abstract
Alkyl (meth) acrylate copolymers comprising from about 10 to about 23 weight percent C.sub.3-C.sub.7 alkyl (meth) acrylate; from about 77 to about 90 weight percent C.sub.12-C.sub.14 alkyl (meth) acrylate(s); and from 0 to about 6 weight percent of at least one C.sub.6-C.sub.20 alkyl (meth) acrylate, which provide excellent low temperature properties and shear stability to lubricating oils. The preferred embodiment comprises butyl (meth) acrylate as the C.sub.3-C.sub.7 alkyl (meth) acrylate, and is essentially free from methyl (meth) acrylate.
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