Polymerization of tetrahydrofuran to prepare polytetramethylene

Details Polymerization of tetrahydrofuran to prepare polytetramethylene Polymerization of tetrahydrofuran to prepare polytetramethylene

1978-12-15

1981-03-31

Garner, Vivian

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

Organic compounds

Oxygen containing

2604106, 560 91, 560 93, 560112, 560200, 560240, C07C 4101, C07C 4126, C07C 4313

Patent

active

042595312

ABSTRACT:
Polytetramethylene ether glycols with molecular weights of from 300 to 4500 are produced by polymerizing tetrahydrofuran with an adduct of antimony pentachloride with carboxylic acids or carboxylic acid esters as the catalyst in the presence of a carboxylic acid anhydride, e.g., acetic anhydride, as the promoter. Esterified, e.g., acetylated, polytetramethylene ether glycols produced are subsequently converted to polytetramethylene ether glycols by saponification or transesterification. The process causes substantially less environmental pollution than do prior art methods, yet it is both economical and flexible.

REFERENCES:
patent: 2499725 (1950-03-01), Copelin
patent: 2691038 (1954-10-01), Englehardt
patent: 3720719 (1973-03-01), Matsuda et al.
patent: 3720719 (1969-07-01), Dunlop et al.

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