Method for reducing oligomeric cyclic ether content of a polymer

Details Method for reducing oligomeric cyclic ether content of a polymer Method for reducing oligomeric cyclic ether content of a polymer

1984-01-09

1985-02-19

Nielsen, Earl A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

528421, 528497, 528498, 568617, 568621, C08J 300, C07C 4311

Patent

active

045007055

ABSTRACT:
The oligomeric cyclic ether content of a tetrahydrofuran-, an alkylene oxide-, or a tetrahydrofuran/alkylene oxide polymerizate can be reduced by bringing the polymerizate into contact with an aliphatic- or cycloaliphatic hydrocarbon of 6-8 carbon atoms, and separating the polymerizate and the hydrocarbon phases.

REFERENCES:
patent: 3478109 (1969-11-01), McConnell
patent: 3823145 (1974-07-01), Louvar et al.
patent: 4202964 (1980-05-01), Prukmayr et al.
patent: 4251654 (1981-02-01), Robinson et al.
patent: 4306058 (1981-12-01), Copelin

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