HIGH STRENGTH ANTIFRICTION COMPOSITE BASED ON POLYETHERETHERKETONE FOR MEDICINE AND METHOD OF ITS PRODUCTION Russian patent published in 2020 - IPC A61L27/44 A61L27/46 A61L27/48 A61F2/30 C08K3/32 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention relates to antifriction composite materials based on thermoplastic polymers and can be used for medical or veterinary purposes for making joint implant parts, as well as a method for their production. Disclosed is high-strength antifriction composite based on polyether ether ketone, containing filler based on calcium-phosphate compound, such as nanohydroxyapatite, additionally containing polytetrafluoroethylene with ratio of components, wt%: nanohydroxyapatite (Ca₁₀ (PO₄)₆(OH)₂) with particle size of 20–30 nm 0.3–0.5; polytetrafluoroethylene with particle size of 6–20 mcm 8–10; polyether ether ketone with particle size of 30–50 mcm is the rest. Composite manufacturing method comprises the following stages: mixing powders of polyether ether ketone, polytetrafluoroethylene and nanohydroxyapatite, which is carried out by dispersing the suspension of components in ethyl alcohol with ultrasonic treatment for 3–5 minutes; hot pressing at pressure of 15–20 MPa and temperature of 390–405 °C with subsequent cooling rate of 2–3 °C/min.

EFFECT: high-strength antifriction composite for medicine with improved physical-mechanical and tribological properties for tribounits.

3 cl, 1 ex, 2 tbl, 5 dwg