Patent ID: 6858691

Claim:
Crosslinked macromolecular material obtained by polymerization or copolymerization of a compound carrying at least two CF 2 ═CF— groups, wherein a negative charge is highly delocalized, said compound corresponding to the formula [CF 2 ═CF-A − ] m M m+ in which: M m+ is a proton or a metal cation having the valency m chosen from the alkali metal, alkaline earth metal, transition metal or rare earth metal ions or an organic onium cation or an organometallic cation, 1≦m≦3; A is an anionic group having one of the formula (I) [—(CF 2 ) n —SO 2 Z] − , (II) [—(O) n′ -Φ-SO 2 Z] − or (III) n and n′ represent 0 or 1; Φ represents a condensed or noncondensed aromatic group, which may or may not carry one or more substituents and which may or may not comprise heteroatoms, or a polyhalogenated group —C 6 H (4−x−y) F x Cl y — (1≦x+y≦4); Z represents —O or one of the —NC≡N, —C(C≡N) 2 , —NSO 2 R or —C[SO 2 R] 2 groups, Z being other than —O when n or n′ are zero; D represents a single bond, an oxygen atom, a sulfur atom, a —CO— carbonyl group or an —SO 2 — sulfonyl group; the groups X 1 to X 4 , hereinafter denoted by X i , represent N, C—C≡N, CR, CCOR or CSO 2 R, it being understood that, in a pentacyclic group, the X i groups can be identical or different; R represents Y, YO—, YS—, Y 2 N—, F, R F ═C q F 2q+1 (preferably 0≦q≦12), CF 2 ═CF—, CF 2 ═CFCF 2 — or CF 2 ═CF—O—, it being understood that, if 2 R substituents are present on the same group, they can be identical or different; Y represents H or a monovalent organic radical having from 1 to 16 carbon atoms chosen from alkyl, alkenyl, oxaalkyl, oxaalkenyl, azaalkyl, azaalkenyl, aryl or alkylaryl radicals or from the radicals obtained from the abovementioned radicals by substitution, in the chains and/or the aromatic part, by heteroatoms, such as halogens, oxygen, nitrogen, sulfur or phosphorus, it being understood that, if sulfur or phosphorus are present, they can optionally be bonded to substituted nitrogen or oxygen atoms, or else Y is a repeat unit of a polymeric backbone.