Polyetheroxy-substituted polyphosphazene purification

Details Polyetheroxy-substituted polyphosphazene purification Polyetheroxy-substituted polyphosphazene purification

1986-01-21

1987-05-05

Foelak, Morton

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528494, 528497, 528499, 528500, 528502, C08G 7300

Patent

active

046634207

ABSTRACT:
Polyetheroxy-substituted polyphosphazenes having reduced mono and polyetheroxy alkanol, alkali metal and halide contaminants that are suitable for use in making solid electrolytes are made by dissolving the impure polyphosphazene in an inert solvent (e.g. tetrahydrofuran) and mixing this solution with a cycloalkane (e.g. cyclohexane) to precipitate the polyetheroxy-substituted polyphosphazene with reduced etheroxy alkanol content. This can be dissolved in water and contacted with an anion exchange material to remove residual halide anions. The purified polyetheroxy-substituted polyphosphazene is then recovered by distilling off the water.

REFERENCES:
patent: 4128710 (1978-12-01), Fieldhouse et al.
patent: 4129529 (1978-12-01), Fieldhouse et al.
patent: 4258173 (1981-03-01), Schulz et al.
patent: 4267311 (1981-05-01), Elefritz, Jr.
patent: 4567229 (1986-01-01), Pettigrew et al.

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