Process for preparing poly (alkylene carbonates)
AssigneeThe Dow Chemical Company
InventorMichael O. Myers
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Abstract
An improved process for the preparation of poly(alkylene carbonate) polymer by the reaction of alkylene oxide with carbon dioxide and/or an alkylene carbonate at an elevated temperature and pressure is disclosed. The improvement comprises conducting said reaction in the presence of a catalyst mixture comprising an alkaline catalyst and a stannate compound.
Claims15
An improved process for the preparation of a poly(alkylene carbonate)polymer by the reaction of an alkylene oxide with carbon dioxide and/or an alkylene carbonate at an elevated temperature and pressure, the improvement comprising conducting said reaction in the presence of a catalytic amount of a catalyst mixture comprising an alkaline catalyst and a metal stannate salt, a tetraalkyl stannane compound and/or a tetraalkoxy stannate compound.
An improved process for the preparation of a poly(alkylene carbonate) polymer by the reaction of an alkylene oxide with carbon dioxide and/or an alkylene carbonate at an elevated temperature and pressure, the improvement comprising conducting said reaction in the presence of a catalyst mixture comprising an alkaline catalyst and an alkali or alkaline earth metal stannate salt.
Dependencies are inferred from the claim text.