PREPARATION OF DOUBLE METAL CYANIDE-CATALYZED POLYOLS BY CONTINUOUS ADDITION OF STARTER

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 (Sc), and optionally, an initially charged starter (Si). The continuously added starter comprises at...

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Bibliographic Details
Main Author PAZOS, JOSE
Format Patent
LanguageEnglish
French
German
Published 25.11.1998
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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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 (Sc), and optionally, an initially charged starter (Si). 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.
AbstractList 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 (Sc), and optionally, an initially charged starter (Si). 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.
Author PAZOS, JOSE
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DocumentTitleAlternate PREPARATION DE POLYOLS CATALYSES AU MOYEN D'UN CATALYSEUR DOUBLE METAL AU CYANURE IMPLIQUANT L'ADDITION EN CONTINU D'INITIATEUR
HERSTELLUNG VON POLYOLEN UNTER VERWENGUNG VON DOPPELMETALLCYANIDKATALYSATOREN MIT DEN KONTINUIERLICHEN ZUGABE VON INITIATOR
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Snippet Double metal cyanide-catalyzed polyols are made by an improved process in which a starter is continuously added during polymerization of the epoxide. The...
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SubjectTerms CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Title PREPARATION OF DOUBLE METAL CYANIDE-CATALYZED POLYOLS BY CONTINUOUS ADDITION OF STARTER
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