| 摘要 |
PURPOSE:To obtain a polyimide resin composition which can give a sliding material excelling in heat resistance, sliding properties and abrasion resistance and having an easily controllable dimensional accuracy by adding a plurality of specified resins to a resin composition comprising a specified polyimide resin and specified graphite. CONSTITUTION:The composition is prepared by adding 10-50 pts.wt. polyetherketone resin of formula II and 5-20 pts.wt. tetrafluoroethylene resin to 100 pts.wt. resin composition comprising 50-90wt.% thermoplastic polyimide resin of formula I (wherein X is a direct bond, a 1-10 C hydrocarbon group, hexafluorinated isopropylidene, carbonyl, thio or sulfone; and R1 to R4 are each H, lower alkyl, lower alkoxyl, Cl or Br; and Y is a tetravalent group selected from among a 2 C or higher aliphatic group, a cycloaliphatic group, a monocyclic group, a condensed polycyclic group and a noncondensed polycyclic aromatic group composed of aromatic groups bonded to each other directly or through bridging members) and 50-10wt.% graphite of a fixed carbon content of 50-90wt.% obtained by graphitizing a non-phenolic resin starting material (e.g. pitch). |
