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

1978-12-21

1980-03-11

Nielsen, Earl A.

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

Synthetic resins

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

528482, 568617, 568621, C08G 6530

Patent

active

041929438

ABSTRACT:
The oligomeric cyclic ether content of a tetrahydrofuran/alkylene oxide polymerizate is significantly reduced by bringing the polymerizate into contact with an acid-activated sodium or calcium montmorillonite clay.

REFERENCES:
patent: 2510540 (1950-06-01), Ballard et al.
patent: 2520733 (1950-08-01), Morris et al.
patent: 3053903 (1962-09-01), Holland
patent: 3925484 (1975-12-01), Baker
Okuneva et al., Purification of Tetrahydrofuran-"Propylene Oxide Copolymers," Chemical Abstracts 71, 113659f (1969).
Jefferson Chemical, "Prevention of Haze Formation", Chemical Abstracts 75, 7767n (1971).

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