Hitachi, Ltd.

Masaki Akatsuka

Yoshitaka Takezawa

Yuzo Ito

Katsuo Sugawara

Hisashi Morooka

Yoshitaka Takazawa

This invention provides a thermosetting resin compound containing 25% or more by volume of anisotropic structure in the resin ingredient, wherein a structure constituting said anisotropic structure has a covalent bond and the maximum diameter of the structure is 400 nm or more. The resin ingredient of said thermosetting resin compound is preferably a hardened epoxy resin compound containing a mesogen-structured epoxy resin monomer and an epoxy resin hardening agent. The epoxy resin monomer in the thermosetting resin compound is preferably an epoxy resin monomer expressed by the following formula: E-M-S-M-E, wherein E, M, and S respectively indicate an epoxy group, a mesogen group, and a spacer. Therefore, this invention can provide a highly thermal conductive hardened thermosetting resin compound whose thermal conductivity is increased highly.

Cured thermosetting resin product

An epoxy resin that contains, in a molecule, two mesogens coupled by a folded chain, is provided using a method that ensures easy synthesis of such an epoxy resin, and a uniform epoxy resin composition is provided based on this epoxy resin. The epoxy resin includes a major compound having a structure expressed by the Chemical Formula (1), and a method is provided for manufacturing the epoxy resin by reaction of (A) an epoxy resin with one mesogen contained in a molecule and (B) a compound with two elements of active hydrogen contained in a molecule, with the percentage composition of (B) active hydrogen with respect to (A) epoxy group being 0.25 and over, up to and including 0.7.

Epoxy resin, epoxy resin composition, cured epoxy resin, and manufacturing method thereof

An insulating material of high electrically insulating properties and high thermal conductivity is provided wherein the high thermal conductivity is attained by having a liquid crystal resin comprising a polymerization product of a resin composition containing a monomer which has a mesogen group.

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Saitama, Japan

Masaki Akatsuka