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US 11,401,478 B2Granted
Lubricant and method for manufacturing magnesium alloy tubes
AssigneeBIOTRONIK SE & Co. KG
InventorUllrich Bayer
Life of this patent
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Abstract
A lubricant includes at least 45 wt % paraffin oil, less than 8 wt % of a pyrophosphate or triphosphate, more than 6 wt % of a group 6 disulfide or diselenide and up to 27.5 wt % of graphite. The lubricant is used in a method for producing a magnesium alloy tube via extrusion, and is especially useful to form implants such as stents while maintaining the biocompatibility of the magnesium alloy.
Claims16
A lubricant comprising a liquid matrix with a uniform distribution of solid particles, wherein the liquid matrix comprises:
- at least 45 wt % of a paraffin oil, and the solid particles comprise
- 4 wt % to 8 wt % of a pyrophosphate or triphosphate,
- more than 6 wt % of a group 6 disulfide or diselenide, and
- 22.5 wt % to 27.5 wt % of graphite.
1 more element
Dependencies are inferred from the claim text.