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A kind of photochromic composition of hyperbranched urethane acrylate and its preparation method and application

A polyurethane acrylate and photochromic technology, which is applied in the direction of polyurea/polyurethane coatings, multi-color effect coatings, coatings, etc., can solve the problems of difficulty in industrialized mass production control, loss of practical value, and complex synthesis methods, etc., to achieve Avoid the effects of poor weather resistance, good photochromic effect, and high conversion rate of double bonds

Active Publication Date: 2022-07-22
P&E TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cross-linking and curing methods in this patent are all Michael addition reactions between thiols and olefins. The resulting photochromic film has good flexibility, but sacrifices hardness, friction resistance and chemical resistance, and a protective layer is required for practical applications. Otherwise the discoloration layer will be destroyed and lose its practical value
Moreover, the synthesis method is relatively complicated, requires solvent dilution, and is difficult to control in industrialized batch production

Method used

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  • A kind of photochromic composition of hyperbranched urethane acrylate and its preparation method and application
  • A kind of photochromic composition of hyperbranched urethane acrylate and its preparation method and application
  • A kind of photochromic composition of hyperbranched urethane acrylate and its preparation method and application

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preparation example Construction

[0056] The preparation method of the photochromic composition of the hyperbranched urethane acrylate, comprises the following steps:

[0057] A. Add a mixture of photoinitiator and unsaturated polyol to polythiol, and use LED light source to illuminate the reactant while adding;

[0058] B. Turn off the light source after adding, then heat up to 60-80℃, keep stirring for 1.5-3 hours;

[0059] C, add polymerization inhibitor, then heat up to 110-130 ℃ and vacuumize, then cool down to 55-65 ℃, add acrylate isocyanate, then keep stirring at 65-75 ℃ for 1.5-3 hours;

[0060] D. Gradually add leveling agent, defoamer, ultraviolet light absorber, light stabilizer, antioxidant and photochromic dye, and stir to obtain the photochromic composition.

[0061] The wavelength of the LED light source is 365-405nm, and more preferably the wavelength is any one of 365nm, 385nm, 395nm or 405nm.

[0062] Under the above conditions, the photochromic composition of hyperbranched urethane acryla...

Embodiment 1

[0087] First put 21g PE-1 into the four-necked flask, then turn on the 395nm LED lamp, dropwise add TMPME28g dissolved in 2g TPO, after the dropwise addition, the temperature is raised to 70°C, and after stirring for 2 hours, 0.3g MEHQ is added, and the temperature is raised to 120°C ℃, vacuumed for 1 hour, cooled to 60 ℃ and then added dropwise 42g AOI-VM, after the dropwise addition, kept stirring for 2 hours, measured the NCO content to 0.1%, and then added 0.2g Irganox1076, 0.5g Tinuvin1130, 0.5g Tinuvin123, 0.1 g of 2100, 0.1 g of 920, 2.3 g of Pennine Green and 4.7 g of Reversacol Humber Blue were stirred at 70° C. for 1 hour to obtain a photochromic composition.

[0088] The protective layer composition is coated on the PET substrate, the wet film thickness is 5 microns, the voltage is 150kv, the dose is 100KGy, the oxygen content is controlled at 200PPm, and the film is formed by electron beam radiation curing.

Embodiment 2

[0090] First put 25.5g PE-1 into the four-necked flask, then turn on the 395nm LED lamp, dropwise add 15.8g of 1,4-butenediol that dissolves 2g TPO, heat up to 70°C after the dropwise addition, keep stirring for 2 hours Then, add 0.3g MEHQ, heat up to 120°C, vacuumize for 1 hour, cool down to 60°C, and add 49.7g AOI-VM dropwise. g Irganox1076, 0.5 g Tinuvin 1130, 0.5 g Tinuvin 123, 0.1 g 2100, 0.1 g 920, 2.3 g Pennine Green and 4.7 g Reversacol Humber Blue, stirred at 70° C. for 1 hour to obtain a photochromic composition.

[0091] The protective layer composition is coated on the PET substrate, the wet film thickness is 5 microns, the voltage is 150kv, the dose is 100KGy, the oxygen content is controlled at 200PPm, and the film is formed by electron beam radiation curing.

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Abstract

The invention relates to a photochromic composition of hyperbranched urethane acrylate, a preparation method and application thereof. The photochromic composition comprises: polyvalent mercaptan; unsaturated polyol; acrylate isocyanate; initiator; polymerization inhibitor Agents; Photochromic Dyes; Antioxidants; UV Absorbers; Light Stabilizers; Leveling Agents; Defoamers. The method adopts the reaction of polyvalent mercaptan and unsaturated polyol to generate hyperbranched polyol, photoinitiator initiates polymerization, and then capping with acrylate isocyanate to obtain multifunctional hyperbranched urethane acrylate containing thioether structure, and finally adding other The auxiliary agent and the photochromic dye are the photochromic composition. The photochromic film prepared from the composition by electron beam radiation curing not only has good photochromic effect, but also has high fastness and hardness, outstanding toughness and excellent wear resistance, chemical resistance and chemical resistance. Aging resistance.

Description

technical field [0001] The present invention relates to the technical field of photochromic films, in particular, to a photochromic composition of hyperbranched urethane acrylate and a preparation method and application thereof. Background technique [0002] At present, most of the photochromic films are prepared by sandwich method, which is complicated in process and cannot be mass-produced. Some photochromic films are cured by UV by coating. This process will seriously damage the life of photochromic dyes. Reduce the aging resistance of photochromic films. [0003] According to retrieval, the patent document CN112708344A describes a hyperbranched polyurethane vinyl ether photochromic composition, product and preparation method, which firstly adopts diisocyanate and polyol to prepolymerize into oligomer, and then sequentially adopts trivalent alcohol, Tetrahydric alcohol is polymerized into a polyurethane prepolymer with a hyperbranched structure, and then end-capped with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C08G18/32C09D5/29C08J7/04C08J7/046C08L67/02
CPCC09D175/14C09D5/29C08G18/3876C08J7/0427C08J2367/02C08J2475/14
Inventor 申立全刘仁岳绍杰刘朋飞
Owner P&E TECH CO LTD
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