Process for charge modifying a microphorous membrane

Details Process for charge modifying a microphorous membrane Process for charge modifying a microphorous membrane

1984-09-18

1987-12-08

Lawrence, Evan K.

Coating processes

Foraminous product produced

Filter, sponge, or foam

427245, B05D 500

Patent

active

047117931

ABSTRACT:
A process is provided for for cationically charge modifying a microporous filter membrane, wherein the membrane is a substantially symmetrical isotropic, hydrophilic, organic polymeric microporous filter membrane, preferably nylon, having a microstructure throughout the membrane. The process comprises bonding a primary charge modifying amount of a water soluble cationic charge modifying agent to substantially all of the membrane microstructure, without substantial pore size reduction or pore blockage. The charge modifying agent is a reaction product of a polyamine with epichlorohydrin, the reactive product having (i) tertiary amine or quaternary ammonium groups, and (ii) epoxide groups along a polyamine chain, the epoxide groups capable of bonding to the microstructure of the membrane.

REFERENCES:
patent: T103601 (1983-11-01), Repetti
patent: 2783894 (1957-03-01), Lovell
patent: 2926116 (1960-02-01), Keim
patent: 2926154 (1960-02-01), Keim
patent: 3152061 (1964-10-01), Nishihara
patent: 3158532 (1964-11-01), Pall et al.
patent: 3224986 (1965-12-01), Butler et al.
patent: 3242073 (1966-03-01), Guebert et al.
patent: 3311594 (1967-03-01), Earle, Jr.
patent: 3332901 (1967-07-01), Keim
patent: 3352424 (1967-11-01), Guebert et al.
patent: 3382096 (1968-05-01), Boardman
patent: 3408315 (1968-10-01), Paine
patent: 3497451 (1970-02-01), Hoehn et al.
patent: 3556305 (1971-01-01), Shorr
patent: 3556992 (1971-01-01), Massuco
patent: 3567631 (1971-03-01), Lukach
patent: 3615024 (1971-10-01), Michaels
patent: 3642668 (1972-02-01), Bailey et al.
patent: 3700623 (1972-10-01), Keim
patent: 3761350 (1973-06-01), Munjat et al.
patent: 3808305 (1974-04-01), Gregor
patent: 3876738 (1975-04-01), Marinaccio et al.
patent: 3928517 (1975-12-01), Knight
patent: 3944485 (1976-03-01), Rembaum et al.
patent: 3945927 (1976-03-01), Imai et al.
patent: 3951815 (1976-04-01), Wrasidlo
patent: 4005012 (1977-01-01), Wrasidlo
patent: 4007113 (1977-02-01), Ostreicher
patent: 4007114 (1977-02-01), Ostreicher
patent: 4012324 (1977-03-01), Gregor
patent: 4014798 (1977-03-01), Rembaum
patent: 4045352 (1977-08-01), Rembaum et al.
patent: 4125462 (1978-11-01), Latty
patent: 4148606 (1979-04-01), Morita et al.
patent: 4176156 (1979-11-01), Asanuma et al.
patent: 4178438 (1979-12-01), Hasse et al.
patent: 4203847 (1980-05-01), Grandine
patent: 4203848 (1980-05-01), Grandine II
patent: 4214020 (1980-07-01), Ward et al.
patent: 4225432 (1980-09-01), Booth et al.
patent: 4230573 (1980-10-01), Kilty et a.
patent: 4239714 (1980-12-01), Sparks et al.
patent: 4247498 (1981-01-01), Castro
patent: 4250029 (1981-02-01), Kiser et al.
patent: 4305782 (1981-12-01), Ostreicher et al.
patent: 4340479 (1982-07-01), Pall
patent: 4411795 (1983-10-01), Olson
Ostreicher et al., U.S. application Ser. No. 164,797, filed Jun. 30, 1980.
Wallhauser, Journal of Parenteral Drug Association, Jun. 1979, vol. 33, #3, pp. 156-170.
Howard et al., Journal of Parenteral Drug Association, Mar.-Apr. 1980, vol. 34, #2, pp. 94-102.
Brown et al., CRC Critical Reviews in Environment Control, Mar. 1980, p. 279.
Wenk, Electronic and Chemical Aspects of Water Filtration, Filtration and Separation, May/Jun. 1974.
Tanny et al., Journal of the Parenteral Drug Assoc., Nov.-Dec. 1978, vol. 32, #6, pp. 258-267.
Tanny et al., Journal of the Parenteral Drug Association, Jan.-Feb., 1979, vol. 33, #1, pp. 40-51.
Lukaszewicz et al., Journal of Parenteral Drug Association, Jul.-Aug. 1979, vol. 33, #4, pp. 187-194.
Pall et al., Colloids and Surfaces 1 (1980), pp. 235-256.
Zierdt, Charles, "Adherence of Bacteria . . . ", Applied and Environmental Miroblgy., Dec. 1979, pp. 1166-1172.
Ostreicher, U.S. application Ser. No. 358,822, filed May 9, 1973.
Deutsch et al., "Isolation of Lipids from Plasma by Affinity Chromatography", Biochemical & Biophysical Research Communications, vol. 50, #3, 1973, pp. 758-764.
Hofstee, "Hydrophobic and Other Non-Ionic Paxameters in Protein, Separation and Adsorptive Immobilization by Substituted Agacoses", Polymer Science and Technology, vol. 16, Polymene Separation Media, Edited by Anthony R. Cooper, Copyright 1982, (a collection of manuscripts based on presentations at a symposium Polymeric Separation Media, organized for the Second Chemical Congress of the North American Continent, held in Las Vegas, Aug. 24-29, 1980), pp. 87-92.
Knight, R. A. et al., "Microporous Membranes as Depth Filters", World Filtration Congress III, 9/13 to 17/1982.

Affiliated with

Also associated with

Rating

Process for charge modifying a microphorous membrane does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for charge modifying a microphorous membrane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for charge modifying a microphorous membrane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-22237