Fluorinated polymers and copolymers containing cyclic...

Details Fluorinated polymers and copolymers containing cyclic... Fluorinated polymers and copolymers containing cyclic...

C - Chemistry, Metallurgy

07

C

C07C 43/313 (2006.01) C08F 16/32 (2006.01)

Patent

CA 2149739

Polymers and copolymers of one or more fluorinated dienes of structure CFX1=CX2-O-CX3X4-O-CX2=CX1F, wherein X1 and X2 are F, Cl or H, and X3 and X4 are F or CF3, wherein said dienes es- sentially form cyclic repetitive units, the comonomers used for preparing copolymers being ethylene unsaturated fluori- nated compounds. Processes for preparing the fluorinated dienes having said structure which comprise the reaction in solution between one halogenated olefin and one hypofluorite CX3X4 (OF)2, whe- rein X3 and X4 are F or CF3, and the dehalogenation or dehy- drohalogenation of the linear adduct between one hypofluo- rite molecule and two olefin molecules. The polymers and copolymers of the invention are particu- larly suitable for preparing coatings for applications at high temperatures.

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