Patent ID: 6245881
Filing Date: 2001-06-12
Classification: C08G,C08J,H01M,Y02E

Abstract:
A sulfonated polymer characterized in that it comprises repeating structures of formula (I) ##STR23##in whichthe groups C.sub.1 and C.sub.2 can be identical or different and each represents a tetravalent group selected from the group consisting of at least one, single or condensed polycyclic, aromatic carbon ring having from 6 to 10 carbon atoms and wherein the single or condensed polycyclic aromatic carbon ring is optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms, and a heterocyclic ring or a condensed heterocyclic ring with aromatic character having from 5 to 10 atoms and including one or more heteroatoms chosen from among S, N, and O wherein the heterocyclic ring or condensed heterocyclic ring is optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms; C.sub.1 and C.sub.2 each forming with the neighboring imide groups rings with 5 or 6 atoms;the Ar.sub.1 and Ar.sub.2 groups can be identical or different and each represents a divalent group selected from the group consisting of at least one aromatic carbon ring having from 6 to 10 carbon atoms and optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms and a heterocyclic ring with aromatic character, optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms and having from 5 to 10 atoms and including one or more heteroatoms chosen from among S, N, and O; at least one or both of said aromatic carbon rings and heterocyclic rings of Ar.sub.2 optionally substituted by at least one additional sulphonic acid group; andwhere each of the groups R.sub.1 and R.sub.2 represents NH.sub.2 or a group of formula ##STR24##where C.sub.3 is a divalent group selected from the group consisting of at least one aromatic carbon ring having from 6 to 10 carbon atoms which is optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms, and a heterocyclic ring with aromatic character, optionally substituted with one or more substituents selected from alkyl and alkoxy groups with 1 to 10 carbon atoms and halogen atoms and having from 5 to 10 atoms and including one or more heteroatoms chosen from among S, N, and O; C.sub.3 forming with the neighboring imide group a ring with 5 or 6 atoms;m is a whole number from 2 to 20;n is a whole number from 2 to 30; ando is a whole number from 2 to 10.