Epoxy resin, epoxy resin composition, inorganic filler-containing epoxy resin composition, resin sheet, cured product, and epoxy compound
An epoxy resin obtained by a reaction of an epoxy resin monomer having a mesogen backbone and having two glycidyl groups in one molecule with a divalent phenol compound having, as substituents, two hydroxyl groups on one benzene ring, in which a number average molecular weight in gel permeation chromatographic measurement is from 600 to 2,500.
1. An epoxy resin composition, comprising:
an epoxy resin, which is a reaction product of a first epoxy resin monomer having a mesogen backbone and having two glycidyl groups in a molecule thereof with hydroquinone, wherein the epoxy resin has a number average molecular weight in gel permeation chromatographic measurement of from 600 to 2,500; and
a second epoxy resin monomer having a mesogen backbone,
wherein the epoxy resin composition has a softening temperature measured by a ring-and-ball method of 100° C. or less,
wherein a total content of the first epoxy resin monomer and the second epoxy resin monomer in the epoxy resin composition is from 70 to 99% by mass, and
wherein the first epoxy resin monomer and the second epoxy resin monomer each comprises trans-4-{4-(2,3-epoxypropoxy)phenyl}cyclohexyl 4-(2,3-epoxypropoxy)benzoate.
2. An inorganic filler-containing epoxy resin composition, comprising:
the epoxy resin composition according to claim 1 ; and
an inorganic filler.
3. The inorganic filler-containing epoxy resin composition according to claim 2 , wherein a heat conductivity of a cured product thereof is 7 W/(m·K) or more.
4. The inorganic filler-containing epoxy resin composition according to claim 2 , wherein the inorganic filler comprises magnesium oxide.
5. The inorganic filler-containing epoxy resin composition according to claim 2 , wherein a content of the inorganic filler in the inorganic filler-containing epoxy resin composition is from 60% by volume to 90% by volume, with respect to the total volume of the inorganic filler-containing epoxy resin composition being 100% by volume.