| 摘要 |
The invention relates to a method for producing polytetrahydrofuran and polytetrahydrofuran copolymers, diesters or monoesters thereof by polymerising tetrahydrofuran in the presence of at least one telogen and/or comonomer on acid- activated montmorillonite catalysts, whereby the ratio of the montmorillonite structure to the sum of the muscovite and kaolin structure in the montmorillonite catalyst, which is determined from the intensities of the reflexes measured at 5.5 DEG 2È for montmorillonite, 9.0 DEG 2È for muscovite and 12,5 DEG 2È for kaolin is, after acid activation, at least 5:1.
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| 申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
ELLER, KARSTEN, DR., 67061 LUDWIGSHAFEN, DE;RUETTER, HEINZ, DR., 67126 HOCHDORF-ASSENHEIM, DE;HESSE, MICHAEL, DR., 67549 WORMS, DE;BECKER, RAINER, DR., 67098 BAD DUERKHEIM, DE |
