C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4013
C08L 77/00 (2006.01) F16C 33/20 (2006.01)
Patent
CA 1056983
ABSTRACT OF THE DISCLOSURE An improved plastic composition is disclosed for use in a plastic/metal bearing, wherein one member is a body formed of the novel plastic composition in sliding contact with a metal member, one component of the composition being selected for its capability of coating the metal member's bearing surface, a second component being selected for its chemical inertness, and a third component is selected as a relatively structurally stable carrier material for the second chemically inert component. As the component having a low exchange time - which is the term applied to designate the ability of a plastic to become adhered in non-sliding relation on a member of metal - a high molecular weight polyethylene is chosen; material of molecular weight from 800,000 to 6,000,000, in particle form, is preferred. As the component having chemical inertness, polytetra- fluoroethylene is chosen, making up 10% by weight of the compos- ition where the polyethylene component is 5%. The carrier component is a nylon, especially one made by anionic lactam polymerization permitting a thixotropic agent to maintain homogeneity of the components of the composition.
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