Reddening-resistant layer
The present disclosure relates to an optical laminate or a reddening-resistant layer. The present disclosure can provide an optical laminate that does not cause a so-called reddening phenomenon even when driven or maintained under extremely harsh conditions (e.g., very high temperature conditions), or a reddening-resistant layer applied thereto.
1. A reddening-resistant layer that is a void-containing layer or that comprises the void-containing layer,
wherein the void-containing layer exhibits at least one peak within a scattering vector range of 0.06 to 0.209 nm −1 in a log value graph of scattering intensity of small angle X-ray scattering,
wherein the void-containing layer comprises a binder and hollow particles,
wherein the binder comprises a polymer derived from a polyfunctional acrylate having 2 to 10 polymerizable functional groups,
wherein the hollow particles have a D10 particle diameter in a range from 25 to 50 nm, a D50 particle diameter in a range from 50 to 95 nm and a D90 particle diameter in a range from 100 nm to 200 nm in a weight cumulative curve of particle size distribution, and
wherein the void-containing layer has a thickness of 400 nm or more.
2. The reddening-resistant layer according to claim 1 , wherein a diameter of a void in the void-containing layer is from 0.5 nm to 100 nm.
3. The reddening-resistant layer according to claim 1 , wherein a volume fraction of voids in the void-containing layer is 0.1 or more.
4. The reddening-resistant layer according to claim 1 , wherein the void-containing layer does not comprise solid particles.
5. An optical laminate, comprising:
an optical functional layer; and
the reddening-resistant layer of claim 1 formed on at least one side of the optical functional layer.
6. The optical laminate of claim 5 , wherein the reddening-resistant layer exists adjacent to the optical functional layer and the distance between the reddening-resistant layer and the optical functional layer is 90 μm or less.
7. The optical laminate of claim 6 , wherein the optical functional layer is an iodine-based polarizing layer.
8. A display device, comprising:
a cover glass and
an optical laminate attached to the cover glass,
wherein the optical laminate comprises an optical functional layer and the reddening-resistant layer of claim 1 formed on at least one side of the optical functional layer.