Semipermeable membranes of copolyamides

Details Semipermeable membranes of copolyamides Semipermeable membranes of copolyamides

C - Chemistry, Metallurgy

08

J

18/27

C08J 9/28 (2006.01) B01D 71/56 (2006.01) C08G 69/38 (2006.01) C08G 69/46 (2006.01)

Patent

CA 1101161

Semipermeable membranes of copolyamides Abstract of the Disclosure The invention relates to semipermeable membranes with a water absorption capacity of from 4.5 to 10 % by weight preferably from 4.5 to 8% by weight as measured on approximately 40 µ thick symmetrical films at room temperature and 65 % relative air humidity, with a throughflow of at least 80 1/m2d for a desalination level of at least 85 % and consisting of a fully aro- matic copolyamide with a relative viscosity of z1,4, as measured on a 0.5 % N-methyl pyrrolidone solution at a temperature of 20°C. Le A 16 828-Ca

267138

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