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US 5,399,382 AGranted
Electroless plated aramid surfaces
AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert R. Burch, Richard Gould, Kiu-Seung Lee, Brian R. Phillips
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Abstract
Conductive fibers of a combination of aramid and polyvinyl pyrrolidone (PVP) are disclosed having a strongly bonded metal coating applied by electroless plating. PVP increases adhesion of the fiber surface to the electroless plating. The preferred aramid is poly(p-phenylene terephthalamide).
Claims8
A process for plating an aramid surface with a metal coating consisting essentially of the steps of:
- a) contacting the surface of an aramid structure with an aqueous solution of activating metal cations to, thereby, adhere activating metal cations to the surface of the aramid structure;
- b) rinsing the surface of the aramid structure to remove nonadherent activating metal cations;
- c) immersing the rinsed aramid surface in an aqueous solution of metal cations to be plated and
- a reducing agent;
- whereby metal cations are reduced to metal and are plated on the aramid surface,
- wherein the improvement comprises,
- providing, as the material which forms the aramid surface, a composition including a substantially homogeneous, combination of from 70 to 98, weight percent, aramid and from 2 to 30, weight percent, polyvinyl-pyrrolidone (PVP) yielding a plated metal coating which is strongly adherent to the aramid surface.
4 more elements
Dependencies are inferred from the claim text.