Epoxy Resin, Epoxy Resin Composition Containing the Epoxy Resin as an Essential Component and a Cured Product Containing the Epoxy Resin as an Essential Component

A new epoxy resin represented by general formula 1 comprising, possessing one or more than one primary hydroxyl group and one or more than one epoxy group in one molecular,

• wherein
• a;
• 0, 1, 2, 3, . . .
• b;
• 0, 1, 2, 3, . . .
• c;
• 0, 1, 2, 3, . . .
• d;
• 1, 2, 3, . . .
• wherein a+c;
• 1, 2, 3, . . .
• l;
• 1, 2, 3, . . .
• m;
• 0, 1, . . .
• (EP) is a reaction residue of epoxy resin and is specifically represented by general formulae 2 and 3,
• (E) is a reaction residue of epoxy resin and is specifically represented by general formulae 4 and 5,
• (X) is a carbon alone or hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom,
• (A) is a hydrocarbon group of acid anhydride residue and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom,
• R is a hydrogen or hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom,
• wherein
• n;
• 1, 2, 3, . . .
• Y is a hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom, further can be a structure of linear, branch, ring, aromatic ring or heterocyclic,
• wherein
• q;
• 1, 2, 3, . . .
• r;
• 1,2 . . .
• Q is a hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom, further can be a structure of linear, branch, ring, aromatic ring or heterocyclic,
• Z indicates —O—, —COO—or —N═,
• wherein
• u;
• 0, 1, 2, 3, . . .
• t;
• 1, 2, 3, . . .
• Y′ is a hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom, further can be a structure of linear, branch, ring, aromatic ring or heterocyclic,
• wherein
• w;
• 1, 2 . . .
• x;
• 0, 1, 2, 3, . . .
• y;
• 1, 2, 3, . . .
• Q′ is a hydrocarbon group and can contain nitrogen atom, phosphorus atom, oxygen atom or sulfur atom, further can be a structure of linear, branch, ring, aromatic ring or heterocyclic.
• Z′ indicates —O—, —COO— or —N═.