| 摘要 |
PURPOSE:To obtain the title reverse-osmosis membrane having high water permeability by using a polymer having a free amino radical on the principal chain or side chain in the treatment of a cationic electrodeposition paint. CONSTITUTION:A fiber-reinforced polysulfone carrier, for example, is dipped in an aq. soln. of 1,3,5-triaminobenzene, then coated with a soln. of terephthalic acid chloride in 1,1,2-trichloro-1,2,2,-trifluoroethane, and dried. Consequently, the amino compd. having a >=3-functional amino radical is brought into contact with the difunctional reagent capable of forming a covalent bond by the reaction with the amino radical to form the semipermeable ultrathin membrane of a high molecular layer. The composite membrane thus obtained is used as a reverse-osmosis membrane to treat water contg. a cationic electrodeposition paint, and recovery of paint, production of purified water, treatment of waste water, etc., are carried out. |
