Aluminum-containing thermal pastes
AssigneeWacker Chemie AG
InventorSebastian Knör
Life of this patent
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Abstract
A crosslinkable, heat-conducting silicone composition along with processes for producing and uses for the same. Where the composition includes 5-50% by volume of a crosslinkable silicone composition (S) and 50-95% by volume of at least one thermally conductive filler (Z) having a thermal conductivity of at least 5 W/mK. Where the crosslinkable heat-conducting silicone composition has a thermal conductivity of at least 0.6 W/mK and at least 20% by volume of metallic aluminum particles present as thermally conductive fillers (Z).
Claims18
1-14- (canceled)
A crosslinkable, heat-conducting silicone composition (Y), comprising:
- wherein 5-50% by volume of a crosslinkable silicone composition (S);
- wherein 50-95% by volume of at least one thermally conductive filler (Z) having a thermal conductivity of at least 5 W/mK;
- wherein the crosslinkable heat-conducting silicone composition (Y) has a thermal conductivity of at least 0.6 W/mK;
- wherein at least 20% by volume of metallic aluminum particles present as thermally conductive fillers (Z), wherein the thermally conductive fillers (Z)
- a) have a median diameter x50 is in the range of 30-150 μm,
- b) they are produced in the last production step via a melting process and have a predominately rounded surface shape, and
- c) their distribution range SPAN ((x90−x10)/x50) is at least 0.40.
A process for producing a crosslinkable, heat-conducting silicone composition (Y), comprising:
- providing a composition having 5-50% by volume of a crosslinkable silicone composition (S) and 50-95% by volume of at least one thermally conductive filler (Z) having a thermal conductivity of at least 5 W/mK;
- wherein the crosslinkable heat-conducting silicone composition (Y) has a thermal conductivity of at least 0.6 W/mK;
- wherein at least 20% by volume of metallic aluminum particles present as thermally conductive fillers (Z), wherein the thermally conductive fillers (Z)
- a) have a median diameter x50 is in the range of 30-150 μm,
- b) they are produced in the last production step via a melting process and have a predominately rounded surface shape, and
- c) their distribution range SPAN ((x90−x10)/x50) is at least 0.40;
- and mixing the individual components.
Dependencies are inferred from the claim text.