Appeal No. 1998-3113
Application No. 08/583,167
THE INVENTION
The claimed invention is directed toward a specified
polyester polyol composition. Claim 1 is illustrative:
1. A polyester polyol having a hydroxyl number of 60 to
400, which is the esterification product of
a) an alcohol component comprising
a1) one or more aliphatic or cycloaliphatic
alcohols having at least 3 hydroxyl groups and 3 to
8 carbon atoms,
a2) optionally one or more aliphatic or
cycloaliphatic alcohols having 2 hydroxyl groups and 2 to
18 carbon atoms and
a3) optionally one or more aliphatic or
cycloaliphatic, saturated or unsaturated alcohols having
one hydroxyl group and 1 to 18 carbon atoms,
with
b) a carboxylic acid component comprising
b1) itaconic acid, maleic acid, their anhydrides
and/or fumaric acid,
b2) optionally one or more aliphatic or
cycloaliphatic, saturated or unsaturated
dicarboxylic acids having at least 2 carbon atoms
and/or their anhydrides other than those set forth
under b1) and
b3) optionally one or more aliphatic or
cycloaliphatic, saturated or unsaturated
monocarboxylic acids having 1 to 18 carbon atoms
and/or their anhydrides,
provided that component a3) is used in an amount of at least
10 mole%, based on the total moles of component a), or
component b3) is used in an amount of at least 10 mole %,
based on the total moles of component b).
THE REFERENCES
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