Method for the production of tetrahydrofuran copolymers
AssigneeBASF SE
InventorsMartin Haubner, Rolf Pinkos
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Abstract
The present invention provides a process for preparing polyoxyalkylene glycols of a certain molecular weight in one stage by copolymerizing tetrahydrofuran and alpha,omega-diols as the comonomer in the presence of a heteropolyacid and of a hydrocarbon, by distilling off a mixture of water and this hydrocarbon from the copolymerization, which comprises terminating the polymerization when this molecular weight is attained by adding water, comonomer, butanediol or butanediol-water mixtures.
Claims10
A process for preparing polyoxyalkylene glycols comprising copolymerizing, in one stage, tetrahydrofuran and alpha, omega-diols with the exception of butanediol as the comonomer in the presence a heteropolyacid and of a hydrocarbon, distilling off a mixture of water and the hydrocarbon from the copolymerization, and terminating the polymerization by adding water when a molecular weight of from 1,000 to 2,800 is attained.
Dependencies are inferred from the claim text.