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US 2014/0178577 A1Published application
Composite ptfe plating
AssigneeSurface Technology, Inc.
InventorsMichael David Feldstein, Thomas S. Lancsek
Life of this patent
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Abstract
The present invention is directed to compositions, baths, and methods for composite plating including polytetrafluoroethylene (PTFE), and more particularly, to compositions, baths, and methods of composite plating with PTFE in a metal or alloy matrix where the materials used in the process contain no or essentially no PFOS (perfluorooctane sulfonate) and/or no PFOA (perfluorooctanoic acid).
Claims22
1-25. (canceled)
A method for electrolessly metalizing an object comprising the steps of:
- forming an electroless metalizing aqueous bath essentially free of PFOS including a metal salt, a reducing agent, a complexing agent, and a dispersion of particulate matter;
- cleaning the surface of said object;
- maintaining each of the temperature and pH of said electroless metalizing aqueous bath within a desired range;
- immersing said object in said electroless metalizing aqueous bath for a sufficiently adequate duration to form a metalized coating with an effective amount of PTFE on said object;
- and
- removing said object from said electroless metalizing bath;
- wherein said dispersion of particulate matter includes PTFE particulate matter and at least one particulate matter stabilizer, and the concentration of said dispersion in said bath is in the range of 3-10 g/l.
4 more elements
A method for preparing an electroless metalizing aqueous bath for plating an object comprising the steps of:
- forming an aqueous solution of a metal salt, a reducing agent, a complexing agent, at least one particulate matter stabilizer, and a dispersion of PTFE particulate matter in a concentration of 3-10 grams per liter of bath;
- heating said bath to and maintaining the temperature of said plating bath within a desired range;
- controlling the pH of the bath within a desired range;
- and
- monitoring said plating bath to assure that as objects are plated, the dispersion of PTFE particulate matter remains in a concentration in a desired range in said bath;
- wherein said bath is essentially free of PFOS.
3 more elements
Dependencies are inferred from the claim text.