Copolyether glycols of tetrahydrofuran and alkylene oxides havin

Details Copolyether glycols of tetrahydrofuran and alkylene oxides havin Copolyether glycols of tetrahydrofuran and alkylene oxides havin

1979-08-14

1981-02-17

Nielsen, Earl A.

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

Synthetic resins

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

528499, 568617, C08G 6520, C08G 6530

Patent

active

042516544

ABSTRACT:
Tetrahydrofuran/alkylene oxide polymerizates containing no more than 3%, by weight, of oligomeric cyclic ethers are prepared by extracting the ethers from a raw polymerizate with water.

REFERENCES:
patent: 2751419 (1956-06-01), Hill
patent: 3344088 (1967-09-01), Miller
patent: 3425999 (1969-02-01), Axelrood et al.
patent: 3478109 (1969-11-01), McConnell
patent: 4071492 (1978-01-01), Bethea et al.
Hammond et al., "Cationic Copolymerization of Tetrahydrofuran with Epoxides", J. Polymer Science, Part A-1, vol. 9, 281-294, (1971).
Korovina et al., "Formation of a Cyclic Propylene Oxide Tetramer During Copolymerization", Vysokomolekulyarnye Soedineniya (B)17, 597-600, (1975).

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