Appeal 2007-1903
Application 10/047,024
alkoxysilane of formula (2) may contain the hydrolyzed
solution of the tetraalkoxysilane of formula (1) formed in
the presence of an alkaline catalyst, with no problem.
Col. 4, l. 65-col. 5, l. 8.
[T]he hydrolyzed solution of the tetraalkoxysilane
of formula (1) may well be added to the mixture of the
hydrolyzed solution of the alkoxysilane of formula (2)
and the solution of the tetraalkoxy titanium in an organic
solvent. In the absence of the alkoxysilane component of
formula (2), as the case may be, a solution of the mixture
comprising water, an aluminum salt and a deposition
inhibitor is first added to the solution of the tetraalkoxy
titanium in an organic solvent and then the hydrolyzed
solution of the tetraalkoxysilane of formula (1) is added
thereto. For the purpose of further improving the storage
stability of the liquid coating composition of the present
invention, containing the tetraalkoxy titanium of formula
(3), it is preferred that the tetraalkoxy titanium is first
subjected to partial inter-esterification with a glycol such
as ethylene glycol, propylene glycol, hexylene glycol or
the like and then mixed with the hydrolyzed solutions of
alkoxysilanes by the above-mentioned methods. Col. 5,
ll. 9-26.
10) In Example 1, Nogami discloses preparation of a solution
by mixing tetraethoxysilane, ethanol, water and aqueous ammonia
as the alkaline catalyst. According to Nogami, silica particles
were formed by hydrolysis. Example 1, Solution (A).
11) In Example 12, Nogami discloses preparation of a titanium-
containing hydrolyzed solution by mixing tetraethoxysilane and
methyltriethoxysilane in N-methylpyrrolidone with a
tetraisopropoxy titanium/propylene glycol slurry. A liquid coating
5
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Last modified: September 9, 2013