Coating processes – Vacuum utilized prior to or during coating – Organic base
Patent
1977-11-17
1980-07-22
Lusignan, Michael R.
Coating processes
Vacuum utilized prior to or during coating
Organic base
422 48, 55 16, 55158, 210490, 210500M, 427387, 4273935, 4274301, 156180, 156285, B05D 300, B05D 118, B05D 302
Patent
active
042140200
ABSTRACT:
Processes are disclosed for coating the exteriors of a plurality of hollow fibers which are suitable for fluid separations and which are assembled in the form of a bundle. The processes involve immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coating and a substantial amount of solvent. A pressure drop from the exteriors to the interiors of the hollow fibers is provided to result in the formation of a deposit on the exteriors of the hollow fibers. The processes of this invention enable essentially the entire exterior surfaces of the hollow fibers to be coated without undue sticking of the hollow fibers or providing undesirably thick coatings on the hollow fibers in any portion of the bundle or on a portion of any of the hollow fibers.
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Cabasso et al, Research & Development of NS-1 & Related Polysulfone Hollow Fibers for Reverse Osmosis Desalination of Seawater, Gulf South Research Institute, Jul., 1975, pp. cover, 76-89, 120-144.
Carden, Jr. Joseph A.
Chang Richard C.
Danos James C.
Ward Robert R.
Balmer Norman L.
Lusignan Michael R.
Monsanto Company
Stanley Howard C.
Williams, Jr. James W.
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