ANTIFRICTION FILLED COMPOSITION AND METHOD OF PREPARING SAID COMPOSITION

摘要

FIELD: chemistry. ^ SUBSTANCE: invention relates to preparation of filled polymer antifriction compositions which used to make friction bearings of impellar blades of adjustable-blade turbines. The composition contains reinforcing fabric made from carbon fibre with average size of crystals on the basal plane of 3.0-6.0 nm and thickness of the packet of basal planes of 1.0-4.0 nm, thermosetting polymer binder based on chlorine-containing polyglycidyl arylene diamine resin and polytetrafluoroethylene inclusions with thickness of 2-4 mm and surface area of 4-9 mm2, total surface area of which makes up 10-30% of the surface area of the composition. The method of preparing the composition includes a step for adding a surface layer of polytetrafluoroethylene inclusions. Longitudinal and transverse 2-4 mm deep grooves are cut on a solid workpiece made from polytetrafluoroethylene. The surface layer of the workpiece with inclusions cut on a lathe is activated through treatment with a sodium naphthalene complex, joined through projections inside with carbon fabric which is saturated with chlorine-containing polyglycidyl arylene diamine resin. After combined pressure moulding, a surface sheet made from polytetrafluoroethylene is cut, leaving inclusions from polytetrafluoroethylene in the surface layer of the composition. ^ EFFECT: obtaining a composition which with low friction coefficient and low linear wear rate during prolonged use. ^ 5 cl, 4 dwg, 1 tbl, 9 ex