Heat-processable thermally conductive polymer composition
AssigneeDsm IP Assets B.V.
InventorsAbel Frans POT, Hans K. VAN DIRK, Robert H.C. JANSSEN
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Abstract
The present invention relates to a heat-processable thermally conductive polymer composition comprising (a) 30 to 95% by weight of a thermoplastic polymer (b) 5 to 40% by weight of a graphite powder; and (c) 0 to 65% by weight of optional further component(s), wherein the particles of the graphite powder are in the form of platelets having a thickness of less than 500 nm, and a process for the preparation heat-processable thermally conductive polymer composition.
Claims15
A heat-processable thermally conductive polymer composition comprising:
- (a) 30 to 95% by weight of at least one thermoplastic polymer selected from the group consisting of polyamides, polyesters, polyarylene sulfides, polyarylene oxides, polysulfones, polyarylates, polyimides, poly(ether ketone)s, polyetherimides, polycarbonates, and mixtures or copolymers thereof;
- and
- (b) 5 to 30% by weight of a graphite powder in the form of platelets having a thickness of less than 500 nm, wherein the graphite powder has a particle size distribution characterized by a D (v, 0.9) of at least 50 μm and a BET surface area of at least 10 m2/g;
- wherein
- the weight percentages are relative to the total weight of the polymer composition.
A process for preparing a heat-processable thermally conductive polymer composition comprising steps of:
- (i) melt mixing of a thermoplastic polymer, a thermally conductive filler and optionally one or more further components, thereby forming a mixed homogenous melt, and
- (ii) cooling the mixed homogenous melt thereby obtaining the polymer composition in a solid form, wherein
- the thermoplastic polymer is selected from polyamides, polyesters, polyarylene sulfides, polyarylene oxides, polysulfones, polyarylates, polyimides, poly(ether ketone)s, polyetherimides, polycarbonates, copolymers of said polymers among each other and/or with other polymers, including thermoplastic elastomers, and mixtures of said polymers and copolymers, and wherein
- the thermally conductive filler comprises graphite powder comprising platelets having a thickness of less than 500 nm.
Dependencies are inferred from the claim text.