Patent ID: 9567419
Date: 2017-02-14
CPC Classifications: C08F,C08J

Claim:
1. A perfluoroalkyl-crosslinked polymer represented by Structure IV wherein each of Π α and Π β is a polymeric radical backbone chain comprising fluoroalkylene repeat units optionally substituted by ether oxygen, and perfluoroalkyl-crosslinked repeat units at a molar concentration in the range of a molar concentration of 0.5 to 50 mol-%; where x 1 and x 2 each independently is an integer in the range of 0 to 3; y 1 and y 2 each independently is an integer in the range of 0 to 6, and z 1 and z 2 each independently is an integer in the range of 0 to 3; R 1 =(CF 2 ) a CFR 2 , where a is an integer in the range of 0 to 6, and R 2 is F or C 1-6 perfluoroalkyl optionally substituted by ether oxygen; R 1 ′=(CF 2 ) a ′CFR 2 ′ where a′ is an integer in the range of 0 to 6, and R 2 ′ is F or C 1-6 perfluoroalkyl optionally substituted by ether oxygen; and, R 3 and R 3 ′ are each independently F or C 1-6 perfluoroalkyl optionally substituted by ether oxygen; with the proviso that y 1 and z 1 cannot both be zero; with the further proviso that y 2 and z 2 cannot both be zero; with the further proviso that no monomer from which the repeat unit in the backbone chain of said Ha and H polymeric radicals is derived has more than two vinyl hydrogens attached thereto; and, with the further proviso that Π α and Π β can comprise the same or different repeat units.