Filler for heat-conductive plastics materials

U.S. Patent Number: 5344635

Abstract: A powder mixture of aluminium nitride in the form of sintered agglomerates with fractions of different particle size, which mixture comprises (1) 80 to 50% by weight of aluminium nitride in the form of sintered agglomerates having a mean particle diameter of 30 to 50 .mu.m, and (2) 20 to 50% by weight of aluminium nitride in the form of unsintered particles and having a mean particle diameter of 0.1 to 5 .mu.m. The mixture is suitable for use as filler for polymer materials, especially for casting resins, from which moulded parts of high thermal conductivity can be fabricated, for example potted electronic components.

Inventors: Bujard; Patrice (Courtepin, CH), Cojanu; Ileana (Pully, CH)

Assignee: Ciba-Geigy Corporation (Ardsley, NY)

Application Number: 08/011,930

Issued: 1994-09-06

Expired: 2006-09-06

Classes: 423/412 ; 423/353; 523/220; 524/428; 524/439; 524/786

Field of search: 523/220 524/428,439,786 423/412,353

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