Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phosphorus-containing reactant
Patent
1997-05-14
1998-12-01
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phosphorus-containing reactant
528399, 528488, 528489, 528168, C08G 7902
Patent
active
058424717
ABSTRACT:
A method for purification of a polyphosphazene polyacid or acid salt thereof in which a polyphosphazene polyacid or acid salt thereof is dissolved in a concentrated aqueous solution of a salt of monovalent ions. The resulting aqueous solution of the polyphosphazene polyacid or acid salt thereof and the at least one salt of monovalent ions then is diluted to reduce the concentration of the at least one salt of monovalent ions, whereby the polyphosphazene polyacid or acid salt thereof is precipitated. The precipitated polyphosphazene polyacid or acid salt thereof then is recovered.
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Andrianov Alexander K.
LeGolvan Mark P.
Sule Sameer S.
Svirkin Yuri
Lillie Raymond J.
Olstein Elliot M.
Truong Duc
Virus Research Institute, Inc.
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