Porous polymeric membrane comprising vinylidene fluoride

Details Porous polymeric membrane comprising vinylidene fluoride Porous polymeric membrane comprising vinylidene fluoride

2007-01-23

2007-01-23

Choi, Ling-Sui (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

C521S061000, C521S064000

Reexamination Certificate

active

10520943

ABSTRACT:
A process for producing a porous polymeric structure which process comprises preparing a solution comprising a polymer which comprises vinylidene fluoride in a solvent
on-solvent mixture; holding the solution at an elevated temperature until the polymer is completely solvated; casting the solution to form a thin layer; and drying the thin layer to form a membrane. The polymer is dispersed in the non-solvent before addition of the solvent, when preparing the solution, to prevent microgel formation. The prolonged solvation at elevated temperature provides a stable solution, and enables membranes of controlled porosity to be formed.

REFERENCES:
patent: 3620895 (1971-11-01), Bailey et al.
patent: 4238571 (1980-12-01), Mano et al.
patent: 4267364 (1981-05-01), Grot et al.
patent: 4384047 (1983-05-01), Benzinger et al.
patent: 4399025 (1983-08-01), Fletcher et al.
patent: 4433082 (1984-02-01), Grot
patent: 4861480 (1989-08-01), Berardo et al.
patent: 4965291 (1990-10-01), Kitoh et al.
patent: 5158721 (1992-10-01), Allegrezza et al.
patent: 5296318 (1994-03-01), Gozdz et al.
patent: 5384047 (1995-01-01), Scheckler
patent: 6013688 (2000-01-01), Pacheco et al.
patent: 6042958 (2000-03-01), Denton et al.
patent: 6248469 (2001-06-01), Formato et al.
patent: 2003/0022951 (2003-01-01), Coowar et al.
patent: 2003/0170545 (2003-09-01), Coowar et al.
patent: 2004/0048165 (2004-03-01), Coowar
patent: 335805 (1989-10-01), None
patent: 0730316 (1996-09-01), None
patent: 2309701 (1997-08-01), None
patent: 2309701 (1997-08-01), None
patent: 62-11521 (1987-01-01), None
patent: WO 02/11230 (2002-02-01), None
WPI/DERWENT Abstract of JP 62-011521.

Affiliated with

Also associated with

Rating

Porous polymeric membrane comprising vinylidene fluoride does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Porous polymeric membrane comprising vinylidene fluoride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Porous polymeric membrane comprising vinylidene fluoride will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3803906