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Photochromic film material and preparation method thereof

A thin-film material and photochromic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, coatings, etc., can solve the problems of not being able to indicate the results of continuous cumulative irradiation of ultraviolet rays, and achieve low cost, easy promotion and application, and skin protection prevent effect

Active Publication Date: 2018-07-06
NANJING HUAKAI BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the materials known to have discoloration, mainly reversible discoloration materials, these are used as UV dose display materials, the problem is that the color will be restored in a dark place without UV rays, and the result of continuous cumulative exposure to UV rays cannot be indicated

Method used

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  • Photochromic film material and preparation method thereof
  • Photochromic film material and preparation method thereof
  • Photochromic film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Proportioning components according to mass percentage:

[0031]

[0032] 2. Preparation method:

[0033] Weigh 10g of EDAB, 5g of methyl salicylate, 2.5g of benzotriazole, 25g of silicone resin, 5g of phosphomolybdic acid, mix in a mixer for 0.5h, the stirring speed is 300r / min, mix well and add isocyanate group 2.5 g of the silane coupling agent was stirred at a speed of 300 r / min for 0.5 h, and the obtained composition was ink-jet printed on a polyurethane film, and cured at room temperature at 25° C. to obtain a film material.

[0034] Three, the effect of this embodiment:

[0035] After testing, the mechanical hardness is 2H, the flexibility is ≤1mm, and the color difference does not change significantly after 72 hours under sunlight.

Embodiment 2

[0037] 1. Proportioning components according to mass percentage:

[0038]

[0039] 2. Preparation method:

[0040] Weigh 25g of ODAB, 7.5g of phenyl salicylate, 2.25g of benzotriazole, 2.5g of silicone resin, and 12.5g of phosphomolybdic acid, and mix them in a mixer for 0.5h at a stirring speed of 300r / min. Add 0.25 g of isocyanate silane coupling agent, continue to stir at 300 r / min for 0.5 h, screen-print the obtained composition on a polyurethane film, and cure at 125° C. to obtain a film material.

[0041] Three, the effect of this embodiment:

[0042] After testing, the mechanical hardness is 2H, the flexibility is ≤1mm, the color difference reaches the maximum in 24 hours under sunlight, the indication is not obvious in the dark, and the experimental effect is not good.

Embodiment 3

[0044] 1. Proportioning components according to mass percentage:

[0045]

[0046] 2. Preparation method:

[0047] Weigh 15g of ODAB, 2.25g of methyl salicylate, 0.5g of benzotriazole, 22.5g of silicone resin, 7.5g of phosphomolybdic acid, and mix them in a mixer for 0.5h at a stirring speed of 300r / min. Add 2.25 g of isocyanatosilane coupling agent, continue to stir at 300 r / min for 0.5 h, screen-print the obtained composition on a polyurethane film, and cure at 100° C. to obtain a film material.

[0048] Three, the effect of this embodiment:

[0049] After testing, the mechanical hardness is 2H, the flexibility is ≤2mm, the color difference is obvious after 72 hours under sunlight, and the continuity of the change is not good.

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Abstract

The invention belongs to the field of smart materials, and particularly discloses a photochromic thin-film material. The photochromic thin-film material is prepared from, by mass, 20%-50% of tertiary amine benzoic ether, 1%-15% of salicylate, 1%-5% of benzotriazole, 5%-50% of organic silicon resin, 0.5%-5% of curing agent and 10%-25% of phosphomolybdic acid. The mass ratio of the organic silicon resin to the curing agent is 10:1. The photochromic thin-film material can meet the ultraviolet irradiation requirement of 72 h everyday radiant intensity, the color is changed continuously from shallow to deep, the ultraviolet continuously-accumulated irradiation result is continuously indicated at the dark position, and the material is high in practicability and capable of being applied and popularized. The invention further provides a preparation method of the photochromic thin-film material.

Description

technical field [0001] The invention belongs to the field of intelligent materials, and in particular relates to a photochromic thin film material, which is an intelligent material that can vary in color according to the intensity of ultraviolet rays and the depth of discoloration. Background technique [0002] With the destruction of the ozone layer in the atmosphere, the intensity of ultraviolet rays in the atmosphere is gradually increasing, which affects people's health. Medical institutions around the world report that the number of people suffering from ultraviolet cancer is increasing year by year. [0003] Sunlight is an indispensable basic element of human life, but too strong ultraviolet rays will produce a series of photobiological adverse reactions, such as sunburn. In sunlight, ultraviolet (UV) radiation mainly causes skin lesions, and UV can be divided into short-wave ultraviolet (UVC, wavelength 200-290nm), medium-wave ultraviolet (UVB, wavelength 290-320nm) a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08L75/04C09D183/06C09D7/63C09D7/61C09K9/02
Inventor 高延敏高洋周建军
Owner NANJING HUAKAI BIOLOGICAL TECH CO LTD
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