Perfluorinated polymers

Details Perfluorinated polymers Perfluorinated polymers

2008-07-01

2008-07-01

Mulcahy, Peter D. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S089000, C526S243000, C428S014000, C430S270100

Reexamination Certificate

active

11640862

ABSTRACT:
Amorphous perfluorinated homopolymers and copolymers of perfluorodioxoles of formula (IA):wherein R′Fis equal to RFor ORFwherein RFis a linear or branched perfluoroalkyl radical having 1-5 carbon atoms; X1and X2, equal to or different from each other, are F, CF3; said polymers having a dioxole content≧95% by moles, having the following property combination:Tg, measured according to the ASTM 3418 (DSC) method, from 180° C. to 195° C.;intrinsic viscosity, measured at the temperature of 30° C. in perfluoroheptane (Galden® D80) according to the ASTM D 2857-87 method, from 13 cc/g to 100 cc/g.

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Pianca, Maurizio, et al., “End groups in Fluoropolymers.” Journal of Fluorine Chemistry 95, 1999, pp. 71-84.

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