Dichloroamino-functionalized fluoropolymer and process for preparing

摘要

This invention pertains to a novel fluoropolymer characterized by a dichloroamino-functionalized perfluoroether pendant group that terminates in —CF2NCl2. The polymer so formed is crosslinkable and useful for the preparation of shaped articles and photo-imaged coatings. The novel fluoropolymer can be thermally treated to form crosslinked fluoropolymers with highly stable perfluoroalkylene crosslinks. The novel fluoropolymer is conveniently prepared by treating a cyano-functionalized fluoropolymer with Cl—F.

主权项

1. A dichloroamino-functionalized polymer having a backbone chain comprising fluoroalkylene repeat units optionally substituted by ether oxygen, and a molar concentration of a molar concentration of 0.5 to 50 mol-% of repeat units represented by Structure I where x is an integer in the range of 0 to 3, y is an integer in the range of 0 to 6, and z is an integer in the range of 0 to 3; R1=(CF2)aCFR2, where a is an integer in the range of 0 to 6, and R2 is F or C1-6 perfluoroalkyl optionally substituted by ether oxygen; R3 is F or C1-6 perfluoroalkyl optionally substituted by ether oxygen; with the proviso that y and z cannot both be zero; and, with the further proviso that no monomeric species from which the repeat unit in the backbone chain of said dichloroamino-functionalized polymer has been formed, comprises more than two vinyl hydrogens attached thereto; and, wherein said dichloroamino-functionalized polymer has no crystalline melting point above 180° C. that is associated with a latent heat of melting greater than 1 J/g.