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1. (WO1998029478) MELT-SPUN POLYSULFONE SEMIPERMEABLE MEMBRANES AND METHODS FOR MAKING THE SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/029478    International Application No.:    PCT/US1997/024087
Publication Date: 09.07.1998 International Filing Date: 30.12.1997
Chapter 2 Demand Filed:    08.05.1998    
IPC:
B01D 67/00 (2006.01), B01D 69/08 (2006.01), B01D 71/68 (2006.01), C08J 3/09 (2006.01)
Applicants: ALTHIN MEDICAL, INC. [US/US]; 14620 N.W. 60th Avenue, P.O. Box 9308, Miami Lakes, FL 33014-9308 (US)
Inventors: MELUCH, Timothy, B.; (US).
CHIANG, Chung-Yuan; (US).
JAANINE, Hamid; (US).
NGUYEN, Thanh; (US).
RUZIUS, Kees; (US).
SILVA, Lalith, K.; (US).
WASHINGTON, George; (US)
Agent: STEPHENS, Donald, L., Jr.; Klarquist, Sparkman, Campbell, Leigh & Whinston, LLP, One World Trade Center, Suite 1600, 121 S.W. Salmon Street, Portland, OR 97204 (US)
Priority Data:
08/774,732 31.12.1996 US
08/932,680 18.09.1997 US
Title (EN) MELT-SPUN POLYSULFONE SEMIPERMEABLE MEMBRANES AND METHODS FOR MAKING THE SAME
(FR) MEMBRANES SEMI-PERMEABLES POLYSULFONES FILEES PAR FUSION ET LEURS PROCEDES DE FABRICATION
Abstract: front page image
(EN)The present invention discloses, $i(inter alia), a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising (1) a polysulfone compound, (2) a solvent, such as sulfolane, antypyrine, $g(d)-valerolactam, diethyl phthalate, and mixtures thereof, and (3) a non-solvent, such as poly(ethylene glycol), di(ethylene glycol), tri(ethylene glycol), glycerol, and mixtures thereof. Another aspect of this invention discloses methods for fabricating semipermeable membranes by homogeneously mixing the composition of the polysulfone compound, solvent, and non-solvent, melting the composition, and melt-spinning the molten composition. Another aspect of the present invention includes homogeneous, melt-spun, semipermeable membranes useful for liquid separation processes, such as, but not limited to, microfiltration, ultrafiltration, dialysis, and reverse osmosis.
(FR)L'invention concerne, en premier lieu, une composition qui permet de fabriquer une membrane semi-perméable homogène. Ladite composition comprend (1) un composé polysulfone, (2) un solvant, tel que sulfolane, antipyrine, $g(d)-valérolactam, diéthyl phtalate et des mélanges de ces produits, et (3) une substance non solvante, telle que poly(éthylène glycol), di(éthylène glycol), tri(éthylène glycol), glycérol et des mélanges de ces produits. Selon un autre aspect, la présente invention concerne des procédés permettant de fabriquer des membranes semi-perméables en mélangeant de façon homogène la composition de composé polysulfone, le solvant et la substance non solvante, en faisant fondre ladite composition et en filant par fusion la composition fondue. Selon un autre aspect encore, la présente invention concerne des membranes semi-perméables, homogènes et filées par fusion, particulièrement utiles pour les procédés de séparation de liquide, tels que, mais pas exclusivement, la microfiltration, l'ultrafiltration, la dialyse et l'osmose inverse.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, 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)