Appeal No. 96-2708
Application 08/335,432
The subject matter of the appeal is directed to an active hydrogen group
composition suitable for use in a reaction injection molding (RIM) process (claims 3-5 and
7) and a process for preparing a molded product by the RIM technique (claim 6).
Appellants separately argue claims 3 and 6. Claim 3 is representative of the
invention and reads as follows:
3. An active hydrogen group containing mixture which
comprises:
A) a catalyst system comprising:
a) a zinc-containing compound capable of catalyzing the reaction
of an isocyanate group with an[sic] hydroxyl group,
b) a non-zinc-containing metal compound capable of catalyzing the
reaction of an isocyanate group with an[sic] hydroxyl group, and
c) a tertiary amine,
wherein the amounts of materials used correspond to the following:
1) the weight ratio of tertiary amine c) to metal compound b) is from
1:10 to 40:1,
2) the weight ratio of tertiary amine c) to zinc compound a) is from
1:3 to 100:1, and
3) the weight ratio of metal compound b) to zinc compound a) is
from 1:5 to 50:1.[sic: ,]
B) one or more compounds having molecular weights of from 400 to
10,000, and containing at least two isocyanate reactive groups,
2
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Last modified: November 3, 2007