Appeal No. 95-0801
Application 08/018,830
process of preparing polyisocyanates having isocyanurate
structure which comprises heating an organic isocyanate at a
temperature of 100-300EC. in the presence of a catalyst
containing components (a) and (b)(main brief, page 2). Claim
1 is illustrative of the subject matter on appeal and is
reproduced below:
1. A process for the preparation of a
polyisocyanate having isocyanurate structure which comprises
heating an organic polyisocyanate, or mixtures thereof, to a
temperature of from about 100 to 300EC in the presence of a
catalytic amount of
(a) a compound selected from the group consisting of
i) lithium salts of aliphatic or aromatic
monocarboxylic or dicarboxylic acids
ii) lithium salts of hydroxyl group containing
compounds having from 1 to 3 hydroxyl
groups per compound, wherein said hydroxyl
groups are directly attached to an aromatic
ring, and
iii) lithium hydroxide; and
(b) an organic compound containing at least one
hydroxyl group for a period of from about 1 minute to about
240 minutes.
The examiner has relied upon the following reference in
support of the rejection for lack of enablement under the
2
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