| 摘要 |
PROBLEM TO BE SOLVED: To obtain an insulation composition having excellent electrical insulation properties and thermal conductivity, whose composition contains a liquid crystal resin prepared by polymerizing a resin composition containing a monomer having a mesogenic group and has specified or higher thermal conductivities in two rectangular directions. SOLUTION: There is provided an insulation composition containing a liquid crystal resin obtained by thermally reacting a resin composition containing a monomer having a carboxyl-free mesogenic group represented by formula I under a specified voltage applied in the direction of thickness and being in a solid state in which the monomer molecules are partially arranged about the mesogenic groups as centers and having thermal conductivities of 0.4 W/mK in two rectangular directions. If required, this composition contains an inorganic ceramics, such as aluminum oxide, boron nitride, or silicon carbide, having a thermal conductivity of 10 W/mK or above. The resin used is an epoxy resin, a polyurethane resin, an acrylic resin, or the like. In formula I, X is a single bond, -N=N-, -C≡C-, or a bond represented by formula II; n is 0-4; and Y is -R, -OR (wherein R is a 1-8C aliphatic hydrocarbon group), -F, -Cl, -Br, -CN, or the like.
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