Process for the preparation of a metal and graphite laminate
AssigneeSigri Great Lakes Carbon GmbH
InventorAlfred Hirschvogel
Life of this patent
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Abstract
A process for the preparation of a laminate of at least one metal layer and at least one layer of flexible graphite includes producing a non-detachable bond between the graphite and the metal without using a mechanical anchoring device and without using a known adhesive. Initially, a contact surface-active agent from the group including organosilicon compounds, perfluorinated compounds and metal soaps is applied in a thin layer to at least one of the surfaces to be bonded. Then the surfaces to be bonded are brought into contact and bonded together by the action of pressure and heat.
Claims42
In a process for the preparation of a laminate being formed of at least one layer of a metal having a surface and at least one layer of graphite having a surface and being produced by pressing expanded graphite, which includes forming a non-detachable bond over all of the surfaces between the metal and the graphite, the improvement which comprises:
- wetting at least one of the surfaces to be bonded with at least one contact surface-active substance having no adhesive character and being selected from the group consisting of organosilicon compounds, perfluorinated compounds and metal soaps, and providing the surface-active substance in a thickness not less than 10 nm and not more than 1000 nm;
- and
- bringing the surfaces to be bonded together into contact with each other and bonding the surfaces together at a temperature of minimally 30.degree. C. and maximally 400.degree. C. and a pressure of minimally 1 MPa and maximally 200 MPa.
In a process for the preparation of a laminate being formed of at least one layer of a metal having a surface and at least one layer of graphite having a surface and being produced by pressing expanded graphite, which includes forming a non-detachable bond over all of the surfaces between the metal and the graphite, the improvement which comprises:
- wetting at least one of the surfaces to be bonded with at least one contact surface-active substance having no adhesive character and being selected from the group consisting of organosilicon compounds, perfluorinated compounds and soaps of the metals sodium, potassium, magnesium and calcium, and providing the surface-active substance in a thickness not less than 10 nm and not more than 1000 nm;
- incorporating at least one hydrolyzable salt of a metal selected from the group consisting of aluminium, zirconium, titanium, tin, zinc and chromium in molecular form into the at least one contact surface-active substance;
- and
- bringing the surfaces to be bonded together into contact with each other and bonding the surfaces together at a temperature of at least 30.degree. C. and at most 400.degree. C. and a pressure of at least 1 MPa and at most 200 MPa.
Dependencies are inferred from the claim text.