Patent ID: 8168705

Claim:
A process for preparing a composite or composite membrane comprising: Mixing, in a dipolar-aprotic solvent: (a) a polymeric acid selected from the group consisting of SO 3 X, PO 3 X 2 , COOX and B(OX) 2 , where X═H + , protonated Triethylamine (C 2 H 5 ) 3 NH + , protonated n-propylamine (C 3 H 7 )NH + , univalent or bivalent or trivalent or tetravalent metal cation; (b) a polymeric base selected from a group consisting of primary, secondary or tertiary amino groups, pyridine groups, imidazole, benzimidazole, triazole, benzo-triazole, pyrazole and benzopyrazole groups, either in a side chain or a main chain; and (c) a metal organic or element organic compound selected from the group consisting of (i) metal element alkoxides and esters of Ti, Zr, Sn, Si, B, or Al, (ii) metal acetylacetonates, (iii) mixed compounds of metal and element alkoxides, (iv) metal acetylacetonates, and (v) organic amino compounds of Ti, Zr, Sn, Si, B, and Al.