Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1996-02-07
1998-07-07
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
502175, 562572, C07C 4103
Patent
active
057771774
ABSTRACT:
Double metal cyanide-catalyzed polyols are made by an improved process in which a starter is continuously added during polymerization of the epoxide. The process includes a continuously added starter (S.sub.c), and optionally, an initially charged starter (S.sub.i). The continuously added starter comprises at least about 2 equivalent percent of the total starter used. The process enables the use of water and low molecular weight polyol starters in DMC-catalyzed polyol synthesis. In addition, the process gives polyether polyols having reduced levels of high molecular weight polyol tail, which can adversely affect polyurethane foam processing.
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Arco Chemical Technology L.P.
Geist Gary
Padmanabhan Sreeni
Schuchardt Jonathan L.
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