Arkema France

Jerome Chauveau

Ramin Amin-Sanayei

Arnaud Gerbaulet

Gregory Scott O'Brien

Anthony Bonnet

Stéphane Bizet

Samuel Devisme

Jean-Laurent Pradel

Gregory Schmidt

Fabrice Chopinez

Florent Abgrall

The invention relates to a fluoropolymer film which makes it possible to manufacture a gelled dense membrane which offers a very good compromise between ionic conductivity and mechanical strength after swelling. This membrane is intended for use as a separator for Li-ion batteries.

Gelled polymer membrane for Li-ion battery

The invention relates to an object or object part made from a composition comprising at least one fluoropolymer F, wherein: &#x2014;the at least one fluoropolymer F comprises vinylidene fluoride units and at least 30 wt. % of units derived from at least one monomer of formula (I): (I) CXX&#x2550;CXY, wherein each of X, Xand Xis independently selected from H, Cl, F, Br, I and alkyl groups comprising from 1 to 3 carbon atoms which are optionally partly or fully halogenated and Y is an alkyl group comprising from 1 to 3 carbon atoms which is optionally partly or fully halogenated; &#x2014;the proportion of the at least one fluoropolymer F in the composition is at least 80 wt. %; and&#x2014;the viscosity of the composition is at least 1000 Pa&#xb7;s at a temperature of 230&#xb0; C. and at a shear rate of 100 s1.

Fluoropolymer thermoplastic elastomer

The invention concerns a coextrusion binder comprising a mixture of at least one ethylene homo- or copolymer (A1) of density ranging between 0.940 and 0.980 g/cmwith at least one propylene homo- or copolymer (B), said mixture being grafted by at least one functional monomer and optionally diluted in at least one non-grafted ethylene homo- or copolymer (A2) of density ranging between 0.940 and 0.980 g/cm; the grafting rate of said coextrusion binder being less than 0.5% wt. % based on the total weight of said binder; the density of said tie ranging between 0.940 and 0.980 g/cm. The invention also concerns a structure comprising said type of binder as well as its use.

Coextrusion binder of co-grafted polyethylene and polypropylene diluted in a non-grafted polyethylene

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Evreux, France

Jerome Chauveau