Photochromic curable composition

摘要

A photochromic curable composition which comprises 100 parts by mass of a polymerizable monomer composition that comprises 70 to 100% by mass of a polymerizable monomer having 2 to 4 (meth)acrylic groups and 0 to 30% by mass of a polymerizable monomer having one (meth)acrylic group and 0.01 to 20 parts by mass of a photochromic compound and in which the methacrylic group content by mole of the polymerizable monomer composition is three to seven times the acrylic group content by mole thereof. A lens having a photochromic coating formed from the photochromic curable composition exhibits excellent photochromic characteristics, enables the formation of a hard coat layer having sufficient tight adhesion and scratch resistance, and causes no delay in fading. Further, the photochromic curable composition exhibits excellent storage stability.