CH3
H3C Al
CH3
“Me” represents a methyl (-CH3) group.
20. According to Geerts’ specification, depending on the relative amounts of boronic acid and
trihydrocarbyl aluminum, the resulting product may be a conventional aluminoxane compound as
described above or a compound including the following structure:
O B O Al
R R
GX 1, col. 3, lines 5-26.
21. Claim 1 of Geerts’ patent provides:
1. A process for preparing a hydrocarbyl aluminoxy composition
comprising reacting a hydrocarbyl boron compound having boron acid
functionality with a trihydrocarbyl aluminum compound under suitable reac-
tion conditions, said hydrocarbyl boron compound being selected from the
group consisting of monoboronic acids of the formula
OH
R B
OH
wherein R is a monovalent hydrocarbyl radical, diboronic acids of the
formula
HO OH
B R' B
HO OH
wherein R' is a divalent hydrocarbyl radical, and hydrocarbyl boronic acids
of the formula R2B(OH) wherein each R is a hydrocarbyl radical.
4
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Last modified: November 3, 2007