Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ
Patent
1980-03-31
1981-07-21
Lusignan, Michael R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
264217, 427358, 427336, 4273899, 2103213, 2105002, 106186, 106187, B29D 2700, B29H 720, B29D 702, B01D 1300
Patent
active
042798469
ABSTRACT:
A semipermeable membrane suitable for the use in an artificial kidney of the filtration type is produced by preparing a solution of cellulose acetate in a solvent mixture consisting essentially of a solvent for cellulose acetate and a swelling agent and spreading said solvent on a substrate, the solvent being a mixture of dimethylformamide and acetone, the swelling agent being a mixture of cyclohexanone and water, the ratio by weight of the amount of dimethylformamide and that of acetone to that of the swelling agent being within the area defined by four points consisting of A (60, 20, 20), B (35, 45, 20), C (25, 35, 40) and D (50, 10, 40) in the triangular coordinates represented by FIG. 1; the ratio of cyclohexanone to water being in a range of from 0.8 to 1.3.
REFERENCES:
patent: 3822330 (1974-07-01), Muir et al.
patent: 4026978 (1977-05-01), Mungle et al.
patent: 4147622 (1979-04-01), Nassbaumer
First International Symposium on Water Desalination, Manjikian et al., pp. 1-9, Oct., 1965.
Honda Zenjiro
Ishii Kiyoshi
Tsugaya Hitoshi
Daicel Chemical Industries Ltd.
Lusignan Michael R.
LandOfFree
Process for preparing semipermeable membrane having selective pe 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 preparing semipermeable membrane having selective pe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing semipermeable membrane having selective pe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2433019