Patent ID: 7470761

Claim:
A proton-conductive, organically cross-linked heteropolysiloxane, obtained by the following steps: (a) At least partially hydrolyzing and condensing (1) one or more sulfonic acid-group containing silane(s) having at least one group that can be cleaved under hydrolytic conditions, (2) one or more styryl-functionalized silane(s), and (3) one or more silane(s), selected from those carrying nitrogen-containing heterocyclic group, an amine group or a sulfonamide group, and having attached thereto at least one group that can be cleaved under hydrolytic conditions, wherein either the components (1), (2) and (3) are mixed before hydrolytic condensation, or mixing is performed during or after hydrolytic condensation of the components, and (b) Effecting an organic cross-linking between existing styryl groups.