Article having organo-phosphonitrile rubber coating bonded to natural or synthetic rubber and method of making

A cured article of natural or synthetic rubber having on its surface a primer coating comprising a cross-linked di- or poly-vinyl compound, and an outer coating comprising a cured organo-phosphonitrile polymer containing randomly distributed repeating units having the structures:

• ##STR4## wherein A represents RO--, RNH--, X(CF.sub.2).sub.m CH.sub.2 O--, or X(CF.sub.2).sub.m CH.sub.2 NH--and B represents R'O, R'NH, Y(CF.sub.2).sub.n CH.sub.2 O--, or Y(CF.sub.2)n CH.sub.2 NH--, R and R' each being selected from the group consisting of lower alkyl and aryl such phenyl, tolyl, chlorophenyl, X and Y each being selected from the group consisting of hydrogen and fluorine, and m and n each being an integer from 1 to 8 inclusive, said outer coating being bonded to said article by said primer coating.