Appeal No 2007-0310
Application No 10/260,498
the base-catalyzed polyol and less than about 0.0375 wt.%, based on the
total weight of the mixture, of the basic catalyst;
c) ethoxylating the mixture at a temperature of from about 130°C to
about 220°C to produce an ethylene oxide-capped polyol; and
d) adding acid to the ethylene oxide-capped polyol;
with the proviso that no precipitate is formed by reaction of the acid
with the basic catalyst.
Thus, claim 10 is directed to a process for preparing an EO-capped
polyol comprising adding a basic catalyst to DMC-catalyzed polyol,
ethoxylating the mixture to form EO-capped polyol, and adding acid, where
the acid does not react with the catalyst to form a precipitate.
Claim 25 is directed to a process for preparing an EO-capped polyol
comprising adding polyol produced in the presence of a basic catalyst to
DMC-catalyzed polyol to form a mixture comprising basic catalyst,
ethoxylating the mixture to form EO-capped polyol, and adding acid, where
the acid does not react with the catalyst to form a precipitate.
2. PRIOR ART
The Examiner relies on the following references:
Herold US 4,355,188 Oct. 19, 1982
Doerge US 4,430,490 Feb. 7, 1984
Nagata JP 51-101099 Sep. 7, 19761
Pazos JP 9-3186 A Jan. 7, 19972
1 The citations are to the English-language translation of record.
2 The citations are to U.S. Patent No. 5,563,221 to Pazos, which is indicated
to be an equivalent.
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