Process for extruding a non-ferrous metal using a lubricant release agent composition
Described is the use of a composition in a process for extruding metals. Said composition includes at least one sodium and/or potassium phthalate and optionally at least one phthalate of an alkaline-earth metal.
1 . A process for extruding a non-ferrous metal, consisting of:
providing a composition consisting of at least one of sodium or potassium phthalate, and optionally at least one phthalate of an alkaline-earth metal,
applying said composition on at least one surface of a head of a piston of an extrusion press and/or on at least one surface of a metal billet before starting said extruding process,
wherein said composition prevents the metal billet from sticking to the head of the piston of the extrusion press, and
wherein said composition is a release agent composition, and
wherein said release agent composition is in powder form.
2 . The process according to claim 1 , wherein the release agent composition has a grain size of between 10 and 150 μm.
3 . The process according to claim 2 , wherein the release agent composition has a grain seize of between 5 and 120 μm.
4 . The process according to claim 1 , wherein the release agent composition consists of a sodium phthalate selected from monosodium phthalate or disodium phthalate.
5 . The process according to claim 4 , wherein the sodium phthalate is selected from disodium orthophthalate, disodium isophthalate and disodium terephthalate.
6 . The process according to claim 5 , wherein the disodium phthalate is disodium orthophthalate.