Appeal No. 2006-0436
Application No. 09/942,465
hydrophilic properties which are unsuitable for textile
application. See the Brief, pages 6-7.
We find nothing in these references that would teach away
from employing the claimed pyrazoles as NCO blocking agents to
form the water-dispersible blocked polyisocyanate taught by Reiff
‘370 or ‘737. As correctly found by the examiner (the Answer,
page 7), these references teach preference for the claimed
pyrazoles as NCO blocking agents in forming textile-treating
polyisocyanate compositions in general. See, e.g., Konig, column
1, lines 15-17 and Baumbach, column 8, Example 3. Konig, for
example, teaches that pyrazoles are “one of the few isocyanate
blocking agents which are stable in aqueous media and capable of
forming reactive crosslinking agents.” See, e.g., Konig, column
1, lines 15-17. Konig also teaches that the claimed pyrazole,
i.e., dimethylpyrazole, is capable of blocking the NCO groups of
a polyisocyanate at a temperature of 65 oC (above 50 oC) as
desired by Reiff ‘370 or ‘737. See Konig, Example 1, columns 3
and 4. Konig only teaches away from using nonionic polyethylene
chains which will impart permanent hydrophilic properties. See
Konig, column 1, lines 35-43.
Baumbach, like Konig, forms a water-dilutable blocked
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