Thermoplastic compositions of polyetheretherketones having improved tribological material properties and use thereof

A thermoplastic composition, comprising:

• (A) a matrix component comprising polyetheretherketones;
• and
• (B) a filler component,
• wherein a content of the polyetheretherketones is from 30 to 95 wt. % based on a total weight of the thermoplastic composition, and wherein the polyetheretherketone comprises a structural element of the following formula (I):
• having Melt Volume-flow Rate (MVR) of from 10 to 90 cm3/10 min determined at 400° C., load 2.16 kg, in a capillary having a length of 8 mm and a diameter of 2.095 mm, inlet angle 180°, and
• wherein the filler component (B) comprises from 5 to 70 wt. % of inorganic and carbon-containing particles based on a total weight of the thermoplastic composition, and comprises, based on a total weight of the thermoplastic composition,
• from 1 to 20 wt. % of hydrophobic silicon dioxide,
• from 1 to 20 wt. % of carbon fibers,
• from 1 to 20 wt. % of titanium dioxide particles,
• from 1 to 20 wt. % of graphite particles, and
• from 1 to 20 wt. % of a particulate lubricant comprising a divalent metallic sulfide and/or alkaline earth metal sulfate,
• wherein the total weight of the thermoplastic composition is 100 wt. %,
• wherein the thermoplastic composition is suitable for at least one lubricant-free tribological application, and
• wherein the hydrophobic silicon dioxide has a particle size distribution D50 of from 2 to 5 m, and a D100 of less than 150 μm, the particle size distribution having been determined according to ISO 13320 with dry-dispersed particles.