Reduction of molecular weight of poly(tetramethylene ether) glyc

Details Reduction of molecular weight of poly(tetramethylene ether) glyc Reduction of molecular weight of poly(tetramethylene ether) glyc

1994-06-22

1996-10-22

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

560227, C07C 4311

Patent

active

RE0353604

ABSTRACT:
A process for reducing the molecular weight of polytetramethylene ether glycol without significant conversion of polytetramethylene ether glycol to tetrahydrofuran monomer is disclosed. The process involves a two-step procedure. The first step comprises reacting polytetramethylene ether glycol with a perfluoroalkyl carboxylic acid to form a perfluoroalkyl ester of polytetramethylene ether glycol. That ester is, in the second step, converted back to polytetramethylene ether glycol of reduced molecular weight by hydrolysis or alcoholysis.

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patent: 4584414 (1986-04-01), Pruckmayr
patent: 5126379 (1992-06-01), Volkert et al.

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