| 摘要 |
PURPOSE:To obtain an ion exchange membrane having high ion transference number even at a high ion concentration, and excellent specific resistance in a solution of polyvalent ion salt, by blending a silane-modified polyolefin resin with an ion exchange resin, forming the blend to a film, and treating the film with hot water. CONSTITUTION:Cation exchange resin beads having sulfone groups are pulverized to fine powder which passes a 325 mesh sieve. The pulverized resin is mixed with a silane-modified polyolefin resin obtained by grafting polyethylene, etc. with an unsaturated silane of formula (A is 1-8c hydrocarbon), pref. at a weight ratio of 70:30-30:70. 100 parts by weight of the above resin mixture is compounded with pref. 0.1-10 parts of a lubricant such as a metal soap, and extruded to a film, which is treated with hot water at >=70 deg.C for 30-120 minutes to obtain the objective ion exchange membrane. |
