| abstract |
The present invention relates to a phenol aralkyl type epoxy resin having at least a structure in which phenols or naphthols are bonded to an aralkyl group as a bonding group, and a structure represented by formula (1) and satisfying condition 1. This epoxy resin is excellent in workability at the time of manufacture of a composition, and quality control is easy.n n n n n n n n Condition 1: When the hydroxyl equivalent of the phenol-modified epoxy resin obtained by adding a phenol equivalent to the epoxy equivalent of an epoxy resin was A (measured based on JIS K 0070), and the epoxy equivalent of this epoxy resin was B, both The relationship of satisfies the following expression (α).n n n 150 ≦ 1000 × (A−B) / B ≦ 250... ... (?)n n n Phenols, naphthols, aralkyl groups, epoxy resins, workability |