Momentive Performance Materials PolarTherm boron
nitride(BN)powdersofgradesPT350,PT360,andPT370
aremedium-densityagglomeratesofhexagonalplatelets,
with crystal sizes of 10-15 μm. These powders possess mean particle sizes in the range of 125 to 250 μm.

Like all PolarTherm BN powders, these grades are outstanding thermal conductors. The agglomerated nature of these
powder grades gives the ability to use high loadings in polymer matrices while maintaining a workable viscosity and
not significantly increasing the weight of BN in the composite.
Care must be taken during compounding not to break apart the agglomerates.

PT350, PT360, and PT370 are best suited for use in filling
applications where numerous thermal paths are required and maintaining a workable viscosity is critical.

Momentive Performance Materials produces over 75 standard and custom grades of BN powders to meet a wide range of application requirements, and has over 40
years of expertise in the synthesis and refinement of boron
nitridepowders.

Applications:
Momentive PolarTherm BN powders’ unique combination
of thermal, electrical, and mechanical properties make them ideal for use in a range of thermal management materials, including:
Gap fillers and underfills
Potting and molding compounds
Silicone and other compliant pads
Liquid encapsulants
Compounded thermoplastics