Light adjusting film and preparation method thereof

Abstract

The invention provides a light adjusting film and a preparation method thereof.The light adjusting film comprises a first conductive layer, an adhesion layer, a polymer dispersing liquid crystal layer and a second conductive layer, wherein the adhesion layer is arranged on the surface of the first conductive layer, and light stabilizer is dispersed in the adhesion layer; the polymer dispersing liquid crystal layer is arranged on the surface, away from the first conductive layer, of the adhesion layer, and the second conductive layer is arranged on the surface, away from the adhesion layer, of the polymer dispersing liquid crystal layer.The light stabilizer is added to the adhesion layer of the light adjusting film, the light stabilizer has the functions of shielding or absorbing energy of ultrasonic rays, eliminating singlet oxygen, decomposing hydroperoxide into innactivated substances and the like, photochemical reaction can be avoided or relieved when the light adjusting film is under light radiation, the light ageing process of the light adjusting film is prevented or delayed, and the service life of the light adjusting film is prolonged.

Description

Technical field

[0001] This application relates to the field of optical materials, and in particular to a dimming film and a preparation method thereof. Background technique

[0002] Polymer dispersed liquid crystal, also known as PDLC (polymerdispersedliquid crystal), uses phase separation technology to uniformly disperse liquid crystals in micron-sized droplets in an organic solid polymer matrix. Due to the light droplets composed of liquid crystal molecules The axis is in free orientation, and its refractive index does not match the refractive index of the substrate. When the light passes through the substrate, it is strongly scattered by the droplets and presents an opaque milky white state or a translucent state. The application of an electric field can adjust the orientation of the optical axis of the liquid crystal droplets. When the refractive indexes of the two are matched, they appear transparent. After removing the electric field, the liquid crystal droplets can resto...

Examples

preparation example Construction

[0042] In yet another exemplary embodiment of the present application, a method for preparing a light-adjustable film is provided. The above-mentioned preparation method is implemented by using a roll-to-roll device. The above-mentioned preparation method includes: step S1, coating the first conductive layer 10 The adhesive layer composition with a solid content of 10-50% is thermally cured to form an adhesive layer 20, the first conductive layer 10 and the adhesive layer 20 form a first structure, wherein the adhesive layer composition A light stabilizer is dispersed; step S2, a polymer dispersed liquid crystal composition is coated on the second conductive layer 40, and cured to form a polymer dispersed liquid crystal layer 30. The second conductive layer 40 and the polymer dispersed liquid crystal layer 30 form a second The second structure, the polymer dispersed liquid crystal composition is a raw material for forming the polymer dispersed liquid crystal layer; and step S3, ...

Embodiment 1

[0060] The light stabilizer is added to the adhesive glue and stirred at a constant speed, and the light stabilizer is dispersed in the adhesive glue and the solvent to form an adhesive layer composition, wherein the weight content of the light stabilizer is 1.825%. The weight content of the adhesive is 34.675%, the adhesive compound is a mixture of compound adhesive 303 and curing agent, the adhesive compound is compound adhesive 303, and the curing agent is vinyl triamine. In the adhesive compound, the weight content of curing agent is 5%; the weight content of the solvent is 63.5%, and the solvent is ethyl acetate. The light stabilizer is a compound light stabilizer of UV-327 and UV-531, the ratio of the two is 2:3, and the solid content of the adhesive layer composition is 36.5%.

[0061] The acrylic resin composition (aliphatic urethane acrylate, hexanediol diacrylate, acrylate, methacrylate, and octadecyl methacrylate=2.8:1.4:3.2:1.1:1.6) and the molecular weight are 200 T...

Embodiment 2

[0069] The light stabilizer is added to the pressure-sensitive adhesive 911P and stirred at a constant speed, and the light stabilizer is dispersed in the adhesive and solvent to form an adhesive layer composition. The weight content of the light stabilizer is 7.3%, and the weight of the pressure-sensitive adhesive is The weight content is 29.2%, the weight content of the solvent is 63.5%, the light stabilizer is 2-hydroxy-4-methoxybenzophenone and 2-[2-hydroxy-3,5-di(1,1-di (Methylpropylphenyl)]-2H-benzotriazole compound, and the ratio of the two is 3:7, benzophenone light-stable substance and benzotriazole light-stable substance are compounded , And the solid content of the adhesive layer composition is 36.5%.

[0070] The acrylic resin composition (aliphatic urethane acrylate, hexanediol diacrylate, acrylate, methacrylate and octadecyl methacrylate=2.8:1.4:3.2:1.1:1.6) and the molecular weight are 700 The liquid crystal is mixed and stirred at a constant speed, the stirring s...

Technical field

[0001] This application relates to the field of optical materials, and in particular to a dimming film and a preparation method thereof. Background technique

[0002] Polymer dispersed liquid crystal, also known as PDLC (polymerdispersedliquid crystal), uses phase separation technology to uniformly disperse liquid crystals in micron-sized droplets in an organic solid polymer matrix. Due to the light droplets composed of liquid crystal molecules The axis is in free orientation, and its refractive index does not match the refractive index of the substrate. When the light passes through the substrate, it is strongly scattered by the droplets and presents an opaque milky white state or a translucent state. The application of an electric field can adjust the orientation of the optical axis of the liquid crystal droplets. When the refractive indexes of the two are matched, they appear transparent. After removing the electric field, the liquid crystal droplets can resto...

Examples

preparation example Construction

[0042] In yet another exemplary embodiment of the present application, a method for preparing a light-adjustable film is provided. The above-mentioned preparation method is implemented by using a roll-to-roll device. The above-mentioned preparation method includes: step S1, coating the first conductive layer 10 The adhesive layer composition with a solid content of 10-50% is thermally cured to form an adhesive layer 20, the first conductive layer 10 and the adhesive layer 20 form a first structure, wherein the adhesive layer composition A light stabilizer is dispersed; step S2, a polymer dispersed liquid crystal composition is coated on the second conductive layer 40, and cured to form a polymer dispersed liquid crystal layer 30. The second conductive layer 40 and the polymer dispersed liquid crystal layer 30 form a second The second structure, the polymer dispersed liquid crystal composition is a raw material for forming the polymer dispersed liquid crystal layer; and step S3, ...

Embodiment 1

[0060] The light stabilizer is added to the adhesive glue and stirred at a constant speed, and the light stabilizer is dispersed in the adhesive glue and the solvent to form an adhesive layer composition, wherein the weight content of the light stabilizer is 1.825%. The weight content of the adhesive is 34.675%, the adhesive compound is a mixture of compound adhesive 303 and curing agent, the adhesive compound is compound adhesive 303, and the curing agent is vinyl triamine. In the adhesive compound, the weight content of curing agent is 5%; the weight content of the solvent is 63.5%, and the solvent is ethyl acetate. The light stabilizer is a compound light stabilizer of UV-327 and UV-531, the ratio of the two is 2:3, and the solid content of the adhesive layer composition is 36.5%.

[0061] The acrylic resin composition (aliphatic urethane acrylate, hexanediol diacrylate, acrylate, methacrylate, and octadecyl methacrylate=2.8:1.4:3.2:1.1:1.6) and the molecular weight are 200 T...

Embodiment 2

[0069] The light stabilizer is added to the pressure-sensitive adhesive 911P and stirred at a constant speed, and the light stabilizer is dispersed in the adhesive and solvent to form an adhesive layer composition. The weight content of the light stabilizer is 7.3%, and the weight of the pressure-sensitive adhesive is The weight content is 29.2%, the weight content of the solvent is 63.5%, the light stabilizer is 2-hydroxy-4-methoxybenzophenone and 2-[2-hydroxy-3,5-di(1,1-di (Methylpropylphenyl)]-2H-benzotriazole compound, and the ratio of the two is 3:7, benzophenone light-stable substance and benzotriazole light-stable substance are compounded , And the solid content of the adhesive layer composition is 36.5%.

[0070] The acrylic resin composition (aliphatic urethane acrylate, hexanediol diacrylate, acrylate, methacrylate and octadecyl methacrylate=2.8:1.4:3.2:1.1:1.6) and the molecular weight are 700 The liquid crystal is mixed and stirred at a constant speed, the stirring s...

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