VERFAHREN ZUR HERSTELLUNG VON POLYOXYTETRAMETHYLENGLYCOL

PCT No. PCT/EP96/03297 Sec. 371 Date Jan. 22, 1998 Sec. 102(e) Date Jan. 22, 1998 PCT Filed Jul. 26, 1996 PCT Pub. No. WO97/05188 PCT Pub. Date Feb. 13, 1997In a process for the preparation of copolymers of tetrahydrofuran and but-2-yne-1,4-diol by catalytic polymerization of tetrahydrofuran, the po...

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Bibliographic Details
Main Authors FISCHER, ROLF, PLITZKO, KLAUS-DIETER, BECKER, RAINER, ELLER, KARSTEN, SIGWART, CHRISTOPH, HEILEN, GERD
Format Patent
LanguageGerman
Published 15.12.1999
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PCT No. PCT/EP96/03297 Sec. 371 Date Jan. 22, 1998 Sec. 102(e) Date Jan. 22, 1998 PCT Filed Jul. 26, 1996 PCT Pub. No. WO97/05188 PCT Pub. Date Feb. 13, 1997In a process for the preparation of copolymers of tetrahydrofuran and but-2-yne-1,4-diol by catalytic polymerization of tetrahydrofuran, the polymerization is carried out over a heterogeneous acidic catalyst which has acid centers of acidity pKa<+2 in a concentration of at least 0.005 mmol/g of catalyst, in the presence of but-2-yne-1,4-diol. In particular, for the preparation of polyoxytetramethylene glycol, the copolymers are reacted in the presence of hydrogen over a hydrogenation catalyst.
Bibliography:Application Number: AT19960927609T