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

1978-11-27

1980-05-13

Nielsen, Earl A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528417, 568617, C08G 6530

Patent

active

042029643

ABSTRACT:
The oligomeric cyclic ether content of a tetrahydrofuran/alkylene oxide polymerizate is significantly reduced by bringing the polymerizate into contact at elevated temperatures with an ion exchange resin bearing -SO.sub.3 H groups.

REFERENCES:
patent: 3359332 (1967-12-01), Johnston
patent: 3405105 (1968-10-01), Blackwell
patent: 3925484 (1975-12-01), Baker
Murbach et al., "Linear Polyurethanes from Polyalkylene Ether Glycols", Chem. Abstracts 55, 1057e (1961).
Rohm & Haas Co., Ion Exchange Department, Technical Bulletin-Amberlist 15.

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