Silicon-derived solvent stable membranes

Details Silicon-derived solvent stable membranes Silicon-derived solvent stable membranes

1992-12-08

1993-11-30

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

21050027, B01D 6102, B01D 6114

Patent

active

052657345

ABSTRACT:
A composite membrane comprises a substrate made from a polymer selected from copolymers and homopolymers of ethylenically unsaturated nitriles, which substrate has preferably first been treated with a pore protector in absence of curing agents and catalysts therefor, prior to applying as the final coating a silicone layer, which is crosslinked. The pore protector, which may be, for example, a hydroxy-terminated polysiloxane, particularly a silanol-terminated polysiloxane, serves the dual purpose of preventing the pores from collapsing, when the support is dried during the curing of the silicone layer, and of preventing passage of the coating material deeply into the pores and thus also preventing an undue reduction of the flux of the finished coated membrane. Such composite membranes include solvent stable membranes which swell to an extent of no more than about 10% when immersed in various organic solvents, and their mixtures with each other and/or water.

REFERENCES:
patent: 3556305 (1971-01-01), Shorr
patent: 3567810 (1971-03-01), Baker
patent: 3615024 (1971-10-01), Michaels
patent: 4029582 (1977-06-01), Ishii
patent: 4125462 (1978-11-01), Latty
patent: 4188354 (1978-10-01), Harada et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4243701 (1981-01-01), Riley et al.
patent: 4468500 (1984-08-01), Malon et al.
patent: 4468501 (1984-08-01), Zampini et al.
patent: 4468502 (1984-08-01), Malon et al.
patent: 4477634 (1984-10-01), Linder et al.
patent: 4553983 (1985-11-01), Baker
patent: 4690765 (1987-09-01), Linder et al.
patent: 4690766 (1987-09-01), Linder et al.
patent: 4704324 (1987-11-01), Davis et al.
patent: 4778596 (1988-10-01), Linder et al.
patent: 4855048 (1989-08-01), Tang et al.
patent: 4902422 (1990-02-01), Pinnau et al.
patent: 4909989 (1990-03-01), Fukazawa et al.
patent: 4950314 (1990-08-01), Yamada et al.
Ward et al. J. Memb. Sci. 1976, 1:99-108.
Baker et al., J. Memb. Sci. 1987, 31: 259-271
Strathmann et al., Desalination, 1975, 16, 179.
Sourirajan, S. (ed.) Reverse Osmosis and Synthetic Membranes, National Research Council Canada Publications, Ottawa, Canada, 1977.
Murari et al. J. Memb. Sci., 16: 121-135 and 181-193, 1983.
Office of Saline Water R&D Progress Report No. 357, Oct. 1967.
Kimmerle et al., J. Memb. Sci, 1988, 36: 477-488.
Rozelle et al., "Development of New Reverse Osmosis Membranes for Desalination"; Research & Development Progress Report No. 359, Oct. 1968, pp. 1-60.

Affiliated with

Also associated with

Rating

Silicon-derived solvent stable membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Silicon-derived solvent stable membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicon-derived solvent stable membranes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2089614