Flexible Nanoparticle Optical Coating Compositions

An article comprising:

• a first substrate with a first major surface and a second major surface;
• and
• a cured or curable optical coating layer adjacent to at least a portion of the second major surface of the first substrate, wherein the cured or curable optical coating layer is prepared from a curable, coatable composition that has been coated and optionally cured, wherein the curable, coatable composition comprises:
• surface-treated inorganic nanoparticles with a high refractive index, wherein the surface-treated inorganic nanoparticles have been treated with a surface treatment agent comprising a silane surface treatment agent;
• and
• a curable reaction mixture, wherein the curable reaction mixture comprises:
• a first (meth)acrylate monomer comprising a high refractive index (meth)acrylate monomer with a refractive index of 1.6 or higher;
• a second (meth)acrylate monomer comprising a lower refractive index (meth)acrylate monomer with a refractive index of less than 1.6;
• and
• at least one initiator.

A device comprising a multilayer optical article, wherein the device comprises a device surface with a multilayer optical article attached to the device surface, wherein the multilayer optical article comprises:

• an adhesive layer in contact with the device surface;
• and
• a cured optical coating layer contacting the adhesive layer, wherein the cured optical coating layer is prepared from a curable, coatable composition that has been coated and cured, wherein the curable, coatable composition comprises:
• surface-treated inorganic nanoparticles with a high refractive index, wherein the surface-treated inorganic nanoparticles have been treated with a surface treatment agent comprising a silane surface treatment agent;
• and
• a curable reaction mixture, wherein the curable reaction mixture comprises:
• a first (meth)acrylate monomer comprising a high refractive index (meth)acrylate monomer with a refractive index of 1.6 or higher;
• a second (meth)acrylate monomer comprising a lower refractive index
• (meth)acrylate monomer with a refractive index of less than 1.6;
• and
• at least one initiator;
• and
• wherein the cured optical coating layer is optically clear, having a visible light transmission of at least 88% and a haze of 5% or less, and has a refractive index of at
• least 1.78, and is capable of passing a 10 millimeter mandrel flexibility test.

A method of preparing an optical article comprising:

• providing a first substrate with a first major surface and a second major surface;
• providing a curable, coatable composition comprising:
• surface-treated inorganic nanoparticles with a high refractive index, wherein the surface-treated inorganic nanoparticles have been treated with a surface treatment agent comprising a silane surface treatment agent;
• and
• a curable reaction mixture, wherein the curable reaction mixture comprises:
• a first (meth)acrylate monomer comprising a high refractive index (meth)acrylate monomer with a refractive index of 1.6 or higher;
• a second (meth)acrylate monomer comprising a lower refractive index (meth)acrylate monomer with a refractive index of less than 1.6;
• and
• at least one initiator;
• coating the curable, coatable composition on at least a portion of the second major surface of the first substrate to form an optical coating layer adjacent to the second major surface of the first substrate;
• and
• curing the optical coating layer.