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1. (WO1998051740) PURIFICATION OF POLYPHOSPHAZENE POLYACIDS
Latest bibliographic data on file with the International Bureau   

Considered void 30.11.1998


Pub. No.: WO/1998/051740 International Application No.: PCT/US1998/009583
Publication Date: 19.11.1998 International Filing Date: 12.05.1998
IPC:
C08G 79/02 (2006.01)
Applicants: VIRUS RESEARCH INSTITUTE, INC.[US/US]; 61 Moulton Street Cambridge, MA 02138, US
Inventors: ANDRIANOV, Alexander, K.; US
LeGOLVAN, Mark, P.; US
SVIRKIN, Yuri; US
SULE, Sameer, S.; US
Agent: LILLIE, Raymond, J. ; Carella, Byrne, Bain, Gilfillan, Cecchi, Stewart & Olstein 6 Becker Farm Road Roseland, NJ 07068, US
Priority Data:
08/856,07314.05.1997US
Title (EN) PURIFICATION OF POLYPHOSPHAZENE POLYACIDS
(FR) PURIFICATION DES POLYACIDES DU POLYPHOSPHAZENE
Abstract:
(EN) 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.
(FR) Procédé permettant de purifier un polyacide de polyphosphazène ou un sel acide de celui-ci. Selon le procédé, on dissout un polyacide de polyphosphazène ou un sel acide de celui-ci dans une solution aqueuse concentrée d'un sel d'ions monovalents; on dilue la solution aqueuse obtenue, renfermant le polyacide de polyphosphazène ou le sel acide de celui-ci et au moins un sel d'ions monovalents, de façon à diminuer la concentration dudit sel d'ions monovalents, ce qui précipite le polyacide de polyphosphazène ou le sel acide de celui-ci; et on récupère le polyacide de polyphosphazène précipité ou le sel acide précipité de celui-ci.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)