A high solids hbn slurry, hbn paste, spherical hbn powder,...

C - Chemistry – Metallurgy – 04 – B

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C04B 35/5833 (2006.01) B32B 5/16 (2006.01) C08K 3/38 (2006.01)

Patent

CA 2455794

The present invention relates to a method for making a hexagonal boron nitride slurry and the resulting slurry. The method involves mixing from about 0.5 wt.% to about 5wt.% surfactant with about 30 wt.% hexagonal boron nitride powder in a medium under conditions effective to produce a hexagonal boron nitride slurry. The present invention also relates to a method for making a spherical boron nitride powder and a method for making a hexagonal boron nitride paste using a hexagonal boron nitride slurry. Another aspect of the present invention relates to a hexagonal boron nitride paste including from about 60 wt.% to about 80 wt.% solid hexagonal boron nitride. Yet another aspect of the present invention relates to a spherical boron nitride powder, a polymer blend including a polymer and the spherical hexagonal boron nitride powder, and a system including such a polymer blend.

L'invention concerne un procédé de production d'une boue de nitrure de bore hexagonal et la boue ainsi obtenue. Ledit procédé consiste à mélanger environ 0,5 % en poids à environ 5 % en poids d'un tensioactif avec environ 30 % d'une poudre de nitrure de bore hexagonal dans un milieu offrant les conditions efficaces pour la production d'une boue de nitrure de bore hexagonal. L'invention concerne également un procédé de production de poudre de nitrure de bore hexagonal et un procédé de production de pâte de nitrure de bore hexagonal au moyen d'une boue de nitrure de bore hexagonal. L'invention concerne en outre une pâte de nitrure de bore hexagonal comprenant environ 60 % en poids à environ 80 % en poids de nitrure de bore hexagonal solide. L'invention concerne enfin une poudre de nitrure de bore sphérique, un mélange polymère comprenant un polymère et ladite poudre de nitrure de bore hexagonal sphérique, et un système comprenant un tel mélange polymère.

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