Perfluorodiacylperoxides as polymerization initiators
AssigneeSolvay Solexis S.p.A.
InventorsWalter Navarrini, Marco Galimberti
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Abstract
Perfluorodiacylperoxides having the following structures: wherein: when Rf is F, Rf′, Rf″ are both —CF3; when Rf is —CF3, Rf′, Rf″, are C1-C3 linear or branched perfluorooxyalkyl groups; said perfluorodiacylperoxides being such as to meet the following proviso: the thermal decomposition constants Kd (sec−1) in the presence of water do not undergo substantial variations with respect to the thermal decomposition constants in absence of water.
Claims14
A polymerization process of one or more fluorinated monomers wherein perfluorodiacylperoxides are used as polymerization initiators, said perfluorodiacylperoxides having the following structures:
- wherein:
- when Rf is F, Rf′, Rf″ are both —CF3;
- when Rf is —CF3, Rf′ and Rf″ are C1-C3 linear or branched perfluorooxvalkyl groups;
- wherein:
- RV is selected from F, perflurooxyalkyl, C1-C3 linear or branched perfluoroalkyl;
- X1, X2 are selected from F, perfluoroalkyl, C1-C3 linear or branched perfluorooxyalkyl;
- wherein:
- n=1-3
- X3 is selected from F, C1-C3 linear or branched perfluoroalkyl, with the proviso that for n=3, X3 cannot be F;
- wherein said perfluorodiacyl peroxides meet the following condition:
- the thermal decomposition constants Kd (sec−1) in the presence of water do not undergo substantial variations with respect to the thermal decomposition constants in absence of water.
Dependencies are inferred from the claim text.