Process for the preparation of polyoxyalkylene block polyethers having enhanced properties
AssigneeBASF SE
InventorRoger A. Ott
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Abstract
Polyoxyalkylene block polyether polyols having enhanced physical properties are prepared by catalyzing the ethylene oxide addition with cesium hydroxide or mixtures of cesium hydroxide with other basic catalysts. These polyethers are especially useful in surface active applications.
Claims19
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties, comprising catalyzing at least the formation of said polyoxyethylene moiety from ethylene oxide with a basic cesium-containing catalyst.
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties by sequential oxyalkylation with ethylene oxide and one or more higher alkylene oxides, comprising catalyzing all oxyalkylations with a cesium hydroxide-containing catalyst.
Dependencies are inferred from the claim text.