Method for the production of tetrahydrofuran copolymers
AssigneeBASF SE
InventorsMartin Haubner, Rolf Pinkos, Stephan Sclitter
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Abstract
The present invention relates to a process for the single-stage preparation of polyoxyalkylene glycols by copolymerization of THF and neopentyl glycol in the presence of a heteropolyacid, wherein the total amount of all impurities of the formula (I) where R1 and R2 are each hydrogen when R3 is an oxyformyl or isopropionate radical, R1 is hydrogen and R2 is hydroxy when R3 is an isopropyl radical and R1 is hydrogen when R2 and R3 together form an —OCH2—C(CH3)—CH2— radical, in the neopentyl glycol is less than 1000 ppm.
Claims20
A process for the single-stage preparation of polyoxyalkylene glycols comprising copolymerization of THF and neopentyl glycol in the presence of a heteropolyacid, wherein the total amount of all impurities of the formula (I)
- where R1 and R2 are each hydrogen when R3 is an oxyformyl or isopropionate radical, R1 is hydrogen and R2 is hydroxy when R3 is an isopropyl radical and R1 is hydrogen when R2 and R3 together form an —OCH2—C(CH3)—CH2— radical,
- in the neopentyl glycol is less than 1000 ppm.
Dependencies are inferred from the claim text.