Aromatic Sulfone Polymer Composition Comprising Tetrafluoroethylene Polymer Particles

6- The composition according to claim 1, wherein at least 50% wt of the recurring units (R) of aromatic sulfone polymer (P) are recurring units (R1), in their imide form (R1-A) and/or amic acid forms [(R1-B) and (R1—C)]:

• wherein
• the → denotes isomerism so that in any recurring unit the groups to which the arrows point may exist as shown or in an interchanged position;
• Ar″ is chosen among the following structures
• with the linking groups being in ortho, meta or para position and R′ being a hydrogen atom or an alkyl radical comprising from 1 to 6 carbon atoms,
• with R being an aliphatic divalent group of up to 6 carbon atoms,
• and mixtures thereof.

7- The composition according to claim 1, wherein at least 50% wt of the recurring units (R) of aromatic sulfone polymer (P) are recurring units (R2) and/or recurring units (R3))

• wherein:
• Q is a group chosen among the following structures
• with RA being
• with n=integer from 1 to 6, or an aliphatic divalent group, linear or branched, of up to 6 carbon atoms;
• and mixtures thereof;
• Ar is a group chosen among the following structures
• with RB being:
• with n=integer from 1 to 6, or an aliphatic divalent group, linear or branched, of up to 6 carbon atoms;
• and mixtures thereof;
• Ar′ is a group chosen among the following structures
• with RC being:
• with n=integer from 1 to 6, or an aliphatic divalent group, linear or branched, of up to 6 carbon atoms;
• and mixtures thereof.

9- The process of claim 8, said process comprising

• (a) mixing an aqueous dispersion of the TFE polymer (F) nanoparticles with the aromatic sulfone polymer (P), as to obtain an aqueous mixture (AM);
• (b) drying said aqueous mixture, as to obtain a dry mixture;
• and
• (c) melt compounding said dry mixture to obtain the polymer composition.

The process of claim 8, said process comprising:

• (a′) dissolving the aromatic sulfone polymer (P) in a suitable solvent, as to obtain a solution of polymer (P) [solution (S)];
• (b′) mixing the TFE polymer (F) nanoparticles with said solution (S), as to obtain a mixture (M);
• and
• (c′) mixing a non-solvent (NS) with said mixture (M), as to obtain a coagulum (C) comprising polymer (P) and polymer (F) nanoparticles.