Appeal 2007-1679
Application 11/041,470
APPENDED CLAIM
18. A hardenable composition for an abrasion resistant coating
consisting essentially of the following constituents:
a hydrolysate of a silane prepared by hydrolysis of a silane containing an
epoxy group and three alkoxy groups, the alkoxy groups being directly
bonded to the silicon atom;
a hydrolysate of a silane prepared by hydrolysis of a silane having formula
(I):
Z1
|
T1 ——— Si ——— T2 (I)
|
Z2
where T1 and T2 are alkoxy groups with 1 to 10 carbon atoms which
will each react to give a PH group o hydrolysis of the silanes of formula (I),
and Z1 (sic, Z1) and Z2 are selected from the group consisting of alkyl groups
with 1 to 10 carbon atoms and aryl groups with 6 to 10 carbon atoms and do
not contain group capable of reacting with the hydrolyzed silanes present in
the compositions;
colloidal silica; and
an aluminum compound selected from the group consisting of:
aluminum chelates, and
compounds having formula (III) or (IV),
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