Patent ID: 7268174
Filing Date: 2007-09-11
Classification: C08G,C09K,H01B,H01F

Abstract:
1. A method of increasing the thermal conductivity of an electrically insulating epoxy material without compromising the electrical insulating properties of the material, the method comprising: stirring an LCT-epoxy resin comprising a crystalline microstructure having a layered nature with an anhydriding agent at approximately 60° C. until a clear LCT-epoxy anhydride solution is formed; after the solution is clear, adding a boehmite material into the clear solution and stirring at approximately 60° C., until the solution is again clear to form a uniform dissolution of the boehmite material substantially free of particle wetting and with essentially complete co-reactivity of the boehmite material with the LCT-epoxy anhydride; and adding an accelerator and curing the solution; the method effective to produce homogeneous alumoxane-LCT-epoxy-anhydride polymers that retain the layered nature of the LCT-epoxy resin and are substantially free of micro-void formation and that exhibit a dielectric strength of at least 1.2 kV/mil while at the same time exhibiting thermal conductivity of at least 0.50 W/mK in a transverse direction and at least 0.99 W/mK in a thickness direction in an environment of 25° C.