PTFE-BASED COMPOSITIONS

摘要

The invention relates to core-shell particles, said particles comprising : - a core consisting essentially of at least one tetrafiuoroethylene (TFE) polymer [polymer (F)], said core having an average primary particle size of less than 100 nm - a shell consisting essentially of at least one high performance polymer [polymer (HPP)], wherein the polymer (HPP) is chosen among polycondensation polymers that have a heat deflection temperature (HDT) of above 800C under a load of 1.82 MPa when measured according to ASTM D648. The core-shell particles of the invention advantageously allow obtaining molded articles with homogeneous properties, both when used alone and when used as additive, as they generally do not undergo segregation phenomena. Still objects of the inventions are the process for manufacturing said core-shell particles, the use of said particles as additives, the composition and the articles thereof.