Floorinated polymers and copolymers containing cyclic structures

Process for the preparation of bisvinyloxymethane derivatives having the structure CFX.sup.1 .dbd.CX.sup.2 --O--CX.sup.3 X.sup.4 --O--CX.sup.2' .dbd.CX.sup.1' F, wherein X.sup.1 and X.sup.2, equal to or different from each other, are F, Cl or H;

• X.sup.3 and X.sup.4, equal to or different from each other, are F or CF.sub.3 ;
• X.sup.1' and X.sup.2', equal to or different from each other, are X.sup.1 or X.sup.2, with the proviso that if X.sup.1 is different from X.sup.2 also X.sup.1' is to be different from X.sup.2', comprising:
• i) addition of an olefin of formula CX.sup.1 X.sup.5 .dbd.CX.sup.2 X.sup.6, wherein X.sup.1, X.sup.2, X.sup.5 and X.sup.6 equal to or different from each other are F, Cl, H or Br, the Br atoms being 2 at most and in such a case being bound to different carbon atoms, X.sup.1 and X.sup.5 not being both F, X.sup.2 and X.sup.6 not being both F, X.sup.1 and X.sup.2 being F only if X.sup.5 and X.sup.6 are different from F and not being both H, in a reactor where an hypofluorite of general formula CX.sup.3 X.sup.4 (OF).sub.2 is essentially always present, where X.sup.3 and X.sup.4 equal to or different from each other, are F or CF.sub.3, dissolved in an inert solvent and having a concentration between 0.001M and 10M, at a temperature from -140.degree. C. to +60.degree. C.;
• ii) separation of the reaction product of two olefin molecules and one hypofluorite molecule from the reaction mixture obtained in i) by fractional distillation
• iii) dehalogenation or dehydrohalogenation of the product obtained in ii), wherein the eliminated halogen atoms are Cl or Br.

Process for preparing bisvinyloxymethane derivatives having the structure CFX.sup.1 .dbd.CX.sup.1 --O--CX.sup.3 X.sup.4 --O--CX.sup.1 .dbd.CX.sup.1 F, wherein X.sup.1 is F, Cl or H;

• X.sup.3 and X.sup.4, equal to or different from each other, are F or CF.sub.3, which comprises:
• i) addition of an olefin of formula CX.sup.1 X.sup.5 .dbd.CX.sup.1 X.sup.6, wherein X.sup.1, X.sup.5 and X.sup.6 equal to or different from each other, are F, Cl, Br or H, X.sup.1 and X.sup.5 not being both F, X.sup.1 and X.sup.6 not being both F, X.sup.1 being Br only if X.sup.5 and X.sup.6 equal to each other are different from Br, X.sup.1 being F only if X.sup.5 and X.sup.6 are different from F and not both H, to an hypofluorite of general formula CX.sup.3 X.sup.4 (OF).sub.2 wherein X.sup.3 and X.sup.4 equal to or different from each other, are F or CF.sub.3, dissolved in an inert solvent having a concentration between 0.001M and 10M, at a temperature from -140.degree. C. to +60.degree. C.;
• ii) separation of the reaction product of two olefin molecules and one hypofluorite molecule from the reaction mixture obtained in i) by fractional distillation
• iii) dehalogenation or dehydrohalogenation of the product obtained in ii), wherein the eliminated halogen atoms are Cl or Br.