Patent ID: 7649025
Filing Date: 2010-01-19
Classification: C08J,H01M,Y02E

Abstract:
1. A composite ion exchange membrane comprising an ion exchange resin composition, and a support membrane having continuous pores penetrating the support membrane, wherein said support membrane is a support membrane which accepts said ion exchange resin composition within said pore, and said ion exchange resin composition is an ion exchange resin composition which contains an ion exchange resin including linking units represented by Chemical Formula 2A and linking units represented by Chemical Formula 2B at a ratio, Chemical Formula 2A: Chemical Formula 2B =n:m, wherein in Chemical Formulas 2A and 2B, Z represents H, Li, Na, K or a cation derived from an aliphatic or aromatic amine; n represents an integer within a range of 1 to 1000; and m represents an integer within a range of 1 to 1000, wherein the composite ion exchange membrane has a surface layer comprising said ion exchange resin composition on each side of said support membrane, wherein the thickness of each of side surface layers is within a range of 1 to 50 μm and also is within a range which does not exceed half the total thickness of said composite ion exchange membrane, wherein at least one surface of said support membrane has an aperture ratio within a range of 40 to 95%, wherein the inherent viscosity of the ion exchange resin is not lower than 0.4 dl/g and nothigher than 1.5 dl/g, wherein the porosity of the support membrane is not lower than 95%, and wherein said Ar wherein in Chemical Formula 4 and Chemical Formula 6, A represents in each occurrence a linking site with another linking unit.