Production of polyether polyols with reduced unsaturation
AssigneeThe Dow Chemical Company
InventorA. J. Heuvelsland
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Abstract
This invention is a process for the preparation of a polyol having an equivalent weight of 200 to 5000 by the reaction of a monoepoxy compound with an initiator containing an active hydrogen atom in the presence of a catalyst substance selected from the group consisting of barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, and mixtures thereof. The process comprises adding water during the reaction of the monoepoxy compound with the initiator. The quantity of water added is one percent or less by weight of the total weight of monoepoxy compound to be reacted with the initiator.
Claims16
A process for preparing a polyol having an equivalent weight of 500 to 4000 which comprises reacting a monoepoxy compound comprising propylene oxide or butylene oxide with an initiator containing an active hydrogen atom in the presence of a catalyst substance selected from the group consisting of barium strontium and their oxides, barium and strontium hydroxides, barium and strontium hydrated hydroxides or barium and strontium monohydroxide salts, or mixtures thereof, and in the presence of water added during the reaction of monoepoxy compound with initiator, wherein the quantity of water is from about one part by weight for 100 to 20000 parts by weight of monoepoxy compound.
Dependencies are inferred from the claim text.