Barrier coating compositions, composites prepared therefrom, and quantum dot polymer composite articles including the same

A clay-polymer composite for a barrier coating, comprising

• a cross-linked polymerization product of a monomer combination comprising a first monomer having at least two thiol (—SH) groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end;
• and
• a plurality of organo-modified clay particles dispersed in the cross-linked polymerization product,
• wherein the organo-modified clay particles comprise a compound having a hydrocarbyl group linked to a heteroatom,
• wherein an amount of the clay particles is greater than or equal to about 1 parts by weight based on 100 parts by weight of the monomer combination and the barrier coating has transmittance of greater than or equal to about 90% for visible light, and
• wherein the compound is a secondary or tertiary amine, a quaternary organoammonium salt, a primary, secondary, or tertiary phosphine, a quaternary organophosphonium salt, a thiol comprising an amine group, or a combination thereof.

A quantum dot-polymer composite article comprising:

• a quantum dot-polymer composite comprising a polymer host matrix and a plurality of quantum dots dispersed in the polymer host matrix;
• and
• a barrier coating disposed on at least a portion of the surface of the quantum dot polymer composite,
• wherein the barrier coating comprises a cross-linked polymerization product of a monomer combination comprising a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end, and a plurality of organo-modified clay particles dispersed in the cross-linked polymerization product,
• wherein the organo-modified clay particles comprise a compound having a hydrocarbyl group linked to a heteroatom,
• wherein an amount of the clay particles is greater than or equal to about 1 parts by weight based on 100 parts by weight of the monomer combination and the barrier coating has transmittance of greater than or equal to about 90% for visible light, and
• wherein the compound is a secondary or tertiary amine, a quaternary organoammonium salt, a primary, secondary, or tertiary phosphine, a quaternary organophosphonium salt, a thiol comprising an amine group, or a combination thereof.