WO2020042207A1 - Ultraviolet light prevention night vision compatible thin film material and preparation method therefor - Google Patents

Abstract

An ultraviolet light prevention night vision compatible thin film material and a preparation method therefor. The thin film material is divided into two layers, wherein one layer is a transparent substrate, and the other layer is a near-infrared absorbing film layer having ultraviolet light prevention ability. The film material has strong absorption characteristics in the wavelength ranges of 320 nm-400 nm and 650 nm-930 nm, and has a high transmittance in the visible light range of 440 nm-625 nm. The present invention has a broad application prospect.

Description

Anti-ultraviolet night vision compatible film material and preparation method thereof Technical field

The invention belongs to the field of thin film materials, and relates to an anti-ultraviolet night vision compatible thin film material and a preparation method thereof.

Background technique

Night vision compatible technology refers to the elimination of light and radiation from the cockpit lighting system that interfere with the night vision device's work through certain technical means, thereby ensuring the normal operation of the night vision device. The use of near-infrared absorbing materials to absorb disturbing light is an important means to achieve night vision compatible technology. At present, the aircraft cockpit lighting system has undergone continuous changes in the red, blue and white, and white lighting systems. However, these lighting systems use visually visible light such as incandescent lamps or ordinary light emitting diodes as light sources, and they have high spectral energy radiation in the near infrared region. This area is the spectral response area of night vision products such as night vision goggles. Under night vision mode, it will inevitably cause interference to the night vision imaging system (NVIS), seriously affect the imaging effect, and even fail to recognize the image. Therefore, the current lighting system must be improved to suit the NVIS environment, that is, night vision compatible technology. The film material with night vision compatibility has very wide application prospects. The properties of different thin film materials also have large differences, so how to prepare thin film materials with good UV protection and high transmittance has become a research problem.

Summary of the Invention

Technical problem to be solved: The conventional anti-ultraviolet light is also compatible with thin film materials. Its anti-ultraviolet performance is poor, and its transmittance in the visible light region is low, which cannot meet the needs of practical use.

Technical solution: In order to solve the above problems, the present invention discloses an anti-ultraviolet night vision compatible thin film material. The thin film material includes a layer of 25nm to 200nm transparent substrate and 5nm to 20nm coated on the transparent substrate. UV-resistant night vision compatible coating;

The transparent substrate is a polyethylene terephthalate film, a polybutylene terephthalate film, a polyethylene naphthalate film, a polycarbonate film, a polypropylene film, a polyimide film, or Polyamide film.

Preferably, the raw materials and components of the anti-ultraviolet night vision compatible coating layer are as follows: 0.3-0.8 parts by mass of an ultraviolet absorber, 0.1-0.5 parts by mass of a near-infrared absorber, and 100 parts by mass of a matrix resin. The resin curing agent is 10 to 25 parts by mass, and the organic solvent is 30 to 50 parts by mass.

Preferably, the ultraviolet absorber is benzotriazole UV-360, benzotriazole UV-326 or benzophenone UV-531.

Preferably, the near-infrared absorbing agent is one or more of a thiodiene-type nickel dye, a methylcyanine dye, and a phthalocyanine dye.

Preferably, the matrix resin is polymethyl methacrylate or polycarbonate.

Preferably, the resin curing agent is an aliphatic polyisocyanate or an alicyclic polyisocyanate, and the organic solvent is chloroform, dichloromethane, or acetone.

A method for preparing a UV-resistant night vision compatible film material, the specific steps are as follows:

(1) Clean the surface of the transparent substrate;

(2) Weigh each raw material of the UV-resistant night vision-compatible coating in proportion and dissolve it in an organic solvent to prepare a UV-resistant night-vision compatible coating, and apply the coating on the surface of the transparent substrate obtained in step (1). ;

(3) The film obtained in step (2) is dried for 4 to 6 hours. After the solvent is volatilized, it is transferred to an 80 ° C oven for curing for 5 to 8 hours.

Beneficial effect: After the anti-ultraviolet night vision compatible coating prepared by the present invention is prepared through a special process and a specific blending range, the obtained thin film material has a good transmittance in the visible light region, and its anti-ultraviolet performance is also very good. Well, it has a very broad application prospect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a transmission spectrum of a thin film material prepared according to the present invention.

detailed description

Example 1

(1) Clean the surface of the transparent substrate polyethylene terephthalate film;

(2) 0.3 parts by mass of benzotriazole UV-360, 0.5 parts by mass of thiodiene type nickel dye of near-infrared absorber, 100 parts by mass of polymethyl methacrylate as matrix resin, and fat of resin curing agent 10 parts by mass of a polyisocyanate-like compound, dissolved in 30 parts by weight of an organic solvent, chloroform, to obtain an anti-ultraviolet night vision compatible coating, and coating the coating on the surface of the transparent substrate obtained in step (1);

(3) The film obtained in step (2) is dried for 4 hours. After the solvent is volatilized, it is transferred to an oven at 80 ° C. for curing for 7 hours.

Example 2

(1) Clean the surface of the transparent substrate polybutylene terephthalate film;

(2) Take 0.8 mass parts of benzotriazole UV-326 as ultraviolet absorber, 0.1 mass parts of methyl cyanine dye as near-infrared absorber, 100 mass parts of polymethyl methacrylate as matrix resin, and fatty polymer as resin curing agent. 25 parts by mass of isocyanate was dissolved in 50 parts by weight of organic solvent dichloromethane to prepare an ultraviolet night vision-resistant coating, and the coating was applied on the surface of the transparent substrate obtained in step (1);

(3) The film obtained in step (2) is dried for 6 hours. After the solvent is volatilized, it is transferred to an 80 ° C oven for 6 hours to be cured.

Example 3

(1) Clean the surface of the transparent substrate polyethylene naphthalate film;

(2) 0.2 parts by mass of benzophenone UV-531 as an ultraviolet absorber, 0.3 parts by mass of a near-infrared absorber phthalocyanine dye, 100 parts by mass of a base resin polymethyl methacrylate, and a resin curing agent fatty polyisocyanate 15 parts by mass, dissolved in 30 parts by weight of an organic solvent, chloroform, to obtain an anti-ultraviolet night vision compatible coating, and coating the coating on the surface of the transparent substrate obtained in step (1);

(3) The film obtained in step (2) is dried for 6 hours. After the solvent is volatilized, it is transferred to an 80 ° C oven for 7 hours for curing.

Example 4

(1) Clean the surface of the polycarbonate film on the transparent substrate;

(2) Take 0.6 mass parts of benzotriazole UV-360 as ultraviolet absorber, 0.2 mass parts of phthalocyanine dye as near-infrared absorber, 100 mass parts of polymethyl methacrylate as matrix resin, and fatty polyisocyanate as resin curing agent. 20 parts by mass, dissolved in 50 parts by weight of an organic solvent, methylene chloride, to obtain an ultraviolet night vision-resistant coating, and coating the coating on the surface of the transparent substrate obtained in step (1);

(3) The film obtained in step (2) is dried for 4 hours. After the solvent is evaporated, it is transferred to an 80 ° C oven for 5 hours to be cured.

Example 5

(1) Clean the surface of the transparent substrate polypropylene film;

(2) Take 0.5 mass parts of benzotriazole UV-326 as ultraviolet absorber, 0.4 mass parts of thiodiene type nickel dye as near-infrared absorber, 100 mass parts of polymethyl methacrylate as matrix resin, and resin curing agent as fat 25 parts by mass of a polyisocyanate-like compound, dissolved in 40 parts by weight of an organic solvent, acetone, to obtain an anti-ultraviolet night vision compatible coating, and coating the coating on the surface of the transparent substrate obtained in step (1);

(3) The film obtained in step (2) is dried for 5 hours. After the solvent is volatilized, it is transferred to an 80 ° C oven for 8 hours.

Claims (7)

A UV-resistant night vision-compatible film material, characterized in that the film material includes a layer of 25nm to 200nm transparent substrate and a 5nm to 20nm UV-proof night vision compatible coating coated on the transparent substrate. Floor; The transparent substrate is a polyethylene terephthalate film, a polybutylene terephthalate film, a polyethylene naphthalate film, a polycarbonate film, a polypropylene film, a polyimide film, or Polyamide film. The UV-resistant night-vision-compatible film material according to claim 1, wherein the raw materials of the UV-resistant night-vision-compatible coating and the mass fraction of each component are as follows: UV absorber 0.3-0.8 Parts by mass, 0.1 to 0.5 parts by mass of near-infrared absorber, 100 parts by mass of base resin, 10 to 25 parts by mass of resin curing agent, and 30 to 50 parts by mass of organic solvent. The anti-ultraviolet night vision compatible film material according to claim 2, wherein the ultraviolet absorber is benzotriazole UV-360, benzotriazole UV-326, or benzophenone UV- 531. The anti-ultraviolet night vision compatible film material according to claim 2, wherein the near-infrared absorbing agent is one of a thiodiene-type nickel dye, a methylcyanine dye, and a phthalocyanine dye. Or more. The anti-ultraviolet night vision compatible film material according to claim 2, wherein the matrix resin is polymethyl methacrylate or polycarbonate. The anti-ultraviolet night vision compatible film material according to claim 2, wherein the resin curing agent is an aliphatic polyisocyanate or an alicyclic polyisocyanate, and the organic solvent is chloroform, dichloromethane, or acetone. A method for preparing a UV-resistant night vision compatible film material is characterized in that the specific steps are as follows: Step 1: clean the surface of the transparent substrate; Step 2: Weigh each raw material of the UV-resistant night vision-compatible coating according to the proportion and dissolve it in an organic solvent to prepare a UV-resistant night-vision compatible coating, and apply the coating on the surface of the transparent substrate obtained in step 1. In step three, the film obtained in step two is dried for 4 to 6 hours. After the solvent is volatilized, it is transferred to an oven at 80 ° C. for curing for 5 to 8 hours.

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