Anti-reflection film and preparation method thereof
A technology of anti-reflection film and anti-reflection layer, which is applied in the direction of optical components, optics, instruments, etc., and can solve the problems of poor optical and mechanical properties of anti-reflection film
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[0075] The preparation method of anti-reflection film provided by the invention comprises the following steps:
[0076] (1) dissolving the resin and curing agent in the middle refractive index layer in an organic solvent to form a coating liquid, and coating the coating liquid on the substrate layer, crosslinking and thermal curing to form a middle refractive index layer;
[0077] (2) Dissolve the metal oxide, the resin in the high refractive index layer and the curing agent in an organic solvent to form a coating solution, which is coated on the medium refractive index layer formed in step (1), and cross-linked and thermally cured to form a high refractive index rate layer;
[0078] (3) dissolving the resin and curing agent in the low-refractive index layer in an organic solvent to form a coating solution, coating on the high-refractive-index layer formed in step (2), and cross-linking and thermosetting to form a low-refractive-index layer, i.e. Get an anti-reflection film. ...
Embodiment 1
[0090] The invention provides an anti-reflection film, the anti-reflection film comprises a base material layer and an anti-reflection layer, one side of the base material layer is coated with an anti-reflection layer, and the anti-reflection layer comprises a low refractive index layer, a medium refractive index layer and high refractive index layer; the anti-reflection film from bottom to top is a substrate layer, a medium refractive index layer, a high refractive index layer and a low refractive index layer; the substrate layer is a transparent film or thin plate.
[0091] Formation of middle refractive index layer A
[0092] Dissolve 40 parts of 2-acrylic acid-(3-phenoxyphenol) methyl ester resin (refractive index 1.57) and 5 parts of isocyanate curing agent in 20 parts of ethyl acetate and butyl acetate (volume ratio 1:1) In the mixed solution, mix evenly to form a coating solution. Coating on the substrate layer with an average thickness of 80 μm, the material of the su...
Embodiment 2
[0098] Anti-reflection film as described in embodiment 1:
[0099] Formation of middle refractive index layer A
[0100] Dissolve 50 parts of 2-acrylic acid-(3-phenoxyphenol) methyl ester resin (refractive index 1.57) and 5 parts of isocyanate curing agent in 20 parts of ethyl acetate and butyl acetate (volume ratio 1:1) In the mixed solution, mix evenly to form a coating solution. Coating on the substrate layer with an average thickness of 80 μm, the material of the substrate layer is PET (refractive index 1.65), and drying (1-4min) in a drying oven (80-110°C) ), cooled to room temperature to obtain the coating of the middle refractive index layer, the average thickness of the prepared middle refractive index layer A is 100nm, and the refractive index is 1.53.
[0101] Formation of high refractive index layer B
[0102] Dissolve 2 parts of titanium dioxide nanoparticles with a particle size of 80nm in a mixed solution of 20 parts of ethyl acetate and butyl acetate (volume ra...
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