Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-03-04
1998-09-29
Smith, Jeffrey T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525538, C08L 4302
Patent
active
058147047
ABSTRACT:
A process for recovering a polyphosphazene polyacid or acid salt obtained by hydrolyzing a polyphosphazene having at least one ester moiety present in at least one substituent group. The polyphosphazene having at least one ester moiety present in at least one substituent group is hydrolyzed with a base in an organic solvent in the presence of water. The water is present in an amount effective to induce the agglomeration of particles of the synthesized polyphosphazene polyacid or acid salt, which enhances the separation of the polyphosphazene polyacid or acid salt from a polymer-free liquid organic phase. The polymer-free liquid organic phase then is separated from the polyphosphazene acid or acid salt, whereby the polyphosphazene acid or acid salt is recovered.
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Paul G. Gassman and William N. Schenk, J. Org. Chem. 42(5), 918-920.
Andrianov Alexander K.
Sargent Jonathan R.
Sule Sameer S.
Cheng Wu C.
Lillie Raymond J.
Olstein Elliot M.
Smith Jeffrey T.
Virus Research Institute, Inc.
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