Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From organic oxygen-containing reactant
Reexamination Certificate
2007-06-05
2007-06-05
Keys, Rosalynd (Department: 1621)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From organic oxygen-containing reactant
C528S485000, C568S613000, C568S618000, C568S620000, C568S623000, C568S624000, C525S088000
Reexamination Certificate
active
11151617
ABSTRACT:
A polyether polyol is formed by a method utilizing a carboxy-modified aluminum-based catalyst. The method includes providing an alkylene oxide, providing an initiator molecule having at least one alkylene oxide reactive hydrogen, and reacting the alkylene oxide with the initiator molecule in the presence of the catalyst. The ideal carboxy-modified aluminum based catalysts used herein are selected from the group of carboxy-modified aluminum phosphate catalysts, carboxy-modified aluminum phosphonate catalysts, and residues or mixtures thereof.
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BASF Corporation
Borrego Fernando A.
Keys Rosalynd
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