Photochromic optical element

A photochromic optical element consisting of:

• an optical substrate,
• a photochromic coat layer,
• a hard coat layer, and
• an antireflection layer,
• that are laminated in this order,
• wherein (I) the photochromic coat layer is formed from a cured product which is obtained by coating the optical substrate with a photochromic coating agent comprising a polymerizable monomer and a photochromic compound, followed by curing the photochromic coating agent, and
• the cured product comprising as the photochromic compound, an alkylamino group-containing photochromic compound and/or a dialkylamino group-containing photochromic compound in a total amount of 0.1 to 10.0% by mass of the photochromic coat layer,
• wherein (II) the hard coat layer is formed from a cured product which is obtained by coating the photochromic coat layer with a hard coat agent comprising metal oxide particles having an average diameter of 1-300 nm and an organosilicone compound, followed by curing the hard coat agent,
• the hard coat agent at least containing as the organosilicone compound at least one component (A) selected from the group consisting of a tetraalkoxy silane, a methyl trialkoxy silane, and partial hydrolysates thereof, and a component (B) consisting of an epoxy group containing silicone compound and/or partial hydrolysates thereof,
• the hard coat agent containing the metal oxide particles, the component (A) and the component (B) in a total amount of 45 to 100% by mass,
• the hard coat agent containing the metal oxide particles in an amount of 20 to 70% by mass, the component (A) in an amount of 10 to 50% by mass, and the component (B) in an amount of 15 to 60% by mass,
• based on the total mass of the metal oxide particles and the organosilicone compound with the proviso that, when the organosilicone compound is a partial hydrolysate of a partially hydrolyzable organosilicone compound, the mass of the organosilicone compound in the above total mass is the mass of the partially hydrolyzable organosilicone compound,
• wherein (III) the antireflection layer comprises a laminate of plural inorganic film layers having different refractive indexes.

A photochromic optical element consisting of:

• an optical substrate,
• a primer layer,
• a photochromic coat layer,
• a hard coat layer, and
• an antireflection layer,
• that are laminated in this order,
• wherein (I) the primer layer is an urethane based primer resin layer,
• wherein (II) the photochromic coat layer is formed from a cured product which is obtained by coating the optical substrate with a photochromic coating agent comprising a polymerizable monomer and a photochromic compound, followed by curing the photochromic coating agent, and
• the cured product comprising as the photochromic compound, an alkylamino group-containing photochromic compound and/or a dialkylamino group-containing photochromic compound in a total amount of 0.1 to 10.0% by mass of the photochromic coat layer,
• wherein (III) the hard coat layer is formed from a cured product which is obtained by coating the photochromic coat layer with a hard coat agent comprising metal oxide particles having an average diameter of 1-300 nm and an organosilicone compound, followed by curing the hard coat agent,
• the hard coat agent at least containing as the organosilicone compound at least one component (A) selected from the group consisting of a tetraalkoxy silane, a methyl trialkoxy silane, and partial hydrolysates thereof, and a component (B) consisting of an epoxy group containing silicone compound and/or partial hydrolysates thereof,
• the hard coat agent containing the metal oxide particles, the component (A) and the component (B) in a total amount of 45 to 100% by mass,
• the hard coat agent containing the metal oxide particles in an amount of 20 to 70% by mass, the component (A) in an amount of 10 to 50% by mass, and the component (B) in an amount of 15 to 60% by mass,
• based on the total mass of the metal oxide particles and the organosilicone compound with the proviso that, when the organosilicone compound is a partial hydrolysate of a partially hydrolyzable organosilicone compound, the mass of the organosilicone compound in the above total mass is the mass of the partially hydrolyzable organosilicone compound, and
• wherein (IV) the antireflection layer comprises a laminate of plural inorganic film layers having different refractive indexes.

A photochromic optical element consisting of:

• an optical substrate,
• a primer layer,
• a photochromic coat layer, and
• a hard coat layer,
• that are laminated in this order,
• wherein (I) the primer layer is an urethane based primer resin layer,
• wherein (II) the photochromic coat layer is formed from a cured product which is obtained by coating the optical substrate with a photochromic coating agent comprising a polymerizable monomer and a photochromic compound, followed by curing the photochromic coating agent, and
• the cured product comprising as the photochromic compound, an alkylamino group-containing photochromic compound and/or a dialkylamino group-containing photochromic compound in a total amount of 0.1 to 10.0% by mass of the photochromic coat layer, and
• wherein (III) the hard coat layer is formed from a cured product which is obtained by coating the photochromic coat layer with a hard coat agent comprising metal oxide particles having an average diameter of 1-300 nm and an organosilicone compound, followed by curing the hard coat agent,
• the hard coat agent at least containing as the organosilicone compound at least one component (A) selected from the group consisting of a tetraalkoxy silane, a methyl trialkoxy silane, and partial hydrolysates thereof, and a component (B) consisting of an epoxy group containing silicone compound and/or partial hydrolysates thereof,
• the hard coat agent containing the metal oxide particles, the component (A) and the component (B) in a total amount of 45 to 100% by mass,
• the hard coat agent containing the metal oxide particles in an amount of 20 to 70% by mass, the component (A) in an amount of 10 to 50% by mass, and the component (B) in an amount of 15 to 60% by mass,
• based on the total mass of the metal oxide particles and the organosilicone compound with the proviso that, when the organosilicone compound is a partial hydrolysate of a partially hydrolyzable organosilicone compound, the mass of the organosilicone compound in the above total mass is the mass of the partially hydrolyzable organosilicone compound.