Appeal No. 1997-0334
Application 08/211,698
corresponding to an equivalent ratio of isocyanate groups
of component b) to alcoholic hydroxyl groups of component
a) of 0.5:1 to 5:1,
B) applying
the mixture obtained in A) to a substrate and
C)
reacting the isocyanate groups and hydroxyl groups to
form said polyurethane coating.
OPINION
THE REFERENCE
The sole reference of record which is being relied on by
the examiner as evidence of obviousness is:
Markusch et al. 5,372,875 December 13,
1994
Markusch et al. discloses an aqueous two-component
polyurethane-forming composition containing a polyisocyanate
and a polyhydroxyl compound (column 1, lines 12 through 16;
column 2, lines 29 through 46). The aqueous composition
contains one or more polyhydroxyl compounds which are either
water soluble or water dispersible and, optionally, an
emulsifier (column 5, line 30 through column 6, line 22).
Useful polyhydroxyl compounds include polyesters (column 5,
3
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