VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON POLYESTERPOLYOL

To provide a method for producing polyester polyol that can provide a simple process to produce extensively improved production efficiencies and also produce the polyester polyol of stable in quality, an apparatus for producing the polyester polyol produced by the method, a polyester polyol produced...

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Hauptverfasser:	INAOKA, KATSUMI, KUMAKI, TAKASHI, MURAYAMA, KOUICHI
Format:	Patent
Sprache:	ger
Schlagworte:	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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Beschreibung
Zusammenfassung:	To provide a method for producing polyester polyol that can provide a simple process to produce extensively improved production efficiencies and also produce the polyester polyol of stable in quality, an apparatus for producing the polyester polyol produced by the method, a polyester polyol produced by the method, and a polyurethane foam obtained by use of the polyester polyol produced by the method, polyethylene terephthalate and raw polyol are allowed to react in a reaction vessel to produce polyester polyol and also ethylene glycol which is a by-product of the reaction is distilled off and the distillate is modified, for example by reaction with an alkylene oxide, in a modifying vessel so that it can have a predetermined hydroxyl value and then is fed to the reaction vessel again as the raw glycol, to thereby produce the polyester polyol.