A kind of anti-ultraviolet microsphere, preparation method and application

An anti-ultraviolet and microsphere technology, applied in the field of polymer materials, to achieve the effect of uniform particle size, simple operation and pure surface

Active Publication Date: 2021-12-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And with organic acid esters as solvent, reactive ultraviolet absorber is the 3rd monomer, the method that has broad-spectrum ultraviolet absorbing copolymer microspheres by self-stabilizing precipitation polymerization is not reported so far.

Method used

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  • A kind of anti-ultraviolet microsphere, preparation method and application
  • A kind of anti-ultraviolet microsphere, preparation method and application
  • A kind of anti-ultraviolet microsphere, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] With ethyl benzoate as the solvent of the reaction system, vinyl acetate 1.72g, maleic anhydride 1.86g, 2-[2-hydroxyl-5-[2-(methacryloyloxy)ethyl]phenyl]- 0.32g of 2H-benzotriazole and 0.039g of initiator azobisisobutyronitrile were dissolved in 40mL of ethyl benzoate, and ultrasonically dissolved to fully mix them evenly. In the reaction system, vinyl acetate, maleic anhydride and 2 -[2-Hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole molar ratio is 100:95:5, the amount of initiator is the total monomer The mass is 1wt%, the total monomer concentration is 1mol / L; the system is ventilated with nitrogen for 30 minutes, the reaction temperature is 75°C, and the reaction time is 8 hours. After the reaction is completed, the reaction product is centrifuged at 12000 rpm for 10 minutes, and petroleum ether is added After washing and centrifuging for three times, and vacuum drying to constant weight, Microsphere 1 was obtained, and the particle diameters are listed...

Embodiment 2

[0035]With xylene as the solvent of the reaction system, 1.72 g of vinyl acetate, 1.86 g of maleic anhydride, 2-[2-hydroxyl-5-[2-(methacryloyloxy)ethyl]phenyl]-2H- Benzotriazole 0.32g, initiator azobisisobutyronitrile 0.039g were dissolved in 40mL of xylene, and ultrasonically dissolved to fully mix them evenly. In the reaction system, vinyl acetate, maleic anhydride and 2-[2- The molar ratio of hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole is 100:95:5, and the amount of initiator is 1 wt% of the total mass of monomers, The total monomer concentration is 1mol / L; the system is ventilated with nitrogen for 30 minutes, the reaction temperature is 75°C, and the reaction time is 8 hours. After the reaction is completed, the reaction product is centrifuged at 12,000 rpm for 10 minutes, and petroleum ether is added to wash and centrifuge three times. , and vacuum-dried to constant weight to obtain microspheres 2, the particle diameters of which are listed in Table 1. ...

Embodiment 3

[0037] With ethyl benzoate / n-heptane (volume ratio 9:1) as the solvent of the reaction system, vinyl acetate 1.72g, maleic anhydride 1.86g, 2-[2-hydroxyl-5-[2-(methyl Acryloyloxy)ethyl]phenyl]-2H-benzotriazole 0.32g, initiator azobisisobutyronitrile 0.039g were dissolved in 40mL solvent, ultrasonically dissolved to fully dissolve to mix evenly, vinyl acetate in the reaction system The molar ratio of ester, maleic anhydride and 2-[2-hydroxyl-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole is 100:95:5, The amount of initiator used is 1 wt% of the total monomer mass, and the total monomer concentration is 1mol / L; the system is ventilated with nitrogen for 30 minutes, the reaction temperature is 75°C, and the reaction time is 8 hours. After the reaction is completed, the reaction product is centrifuged at a speed of 12,000 rpm After separation for 10 min, petroleum ether was added to wash, centrifuged three times, and vacuum-dried to constant weight to obtain microspheres 3, ...

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Abstract

The invention discloses an anti-ultraviolet microsphere, a preparation method and an application thereof, and belongs to the field of polymer materials. The microsphere is prepared by self-stabilizing precipitation polymerization, and the copolymerization system is composed of an electron-donating monomer, an electron-accepting monomer and a reactive ultraviolet absorber monomer. After the reaction, the microspheres can be obtained by centrifugation or filtration purification. The microsphere has an excellent broad-spectrum ultraviolet absorption effect, no stabilizer is used in the polymerization process, no stirring is required, and the solvent can be reused, which is economical and environmentally friendly. The products can be used in polymer film materials, coatings, textiles, sunscreen and skin care and other fields.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a method for preparing microspheres with broad-spectrum ultraviolet absorption by self-stabilizing precipitation polymerization. Background technique [0002] Sunlight contains 5% ultraviolet light, 46% visible light and 49% infrared light. Although it only accounts for a small part of sunlight, excessive exposure to ultraviolet light will not only cause many adverse effects on human health such as sunburn, accelerated skin photoaging and various skin cancers, but also cause the decomposition and degradation of organic compounds , Discoloration of dyes and pigments, damage to the mechanical properties of polymers and plastics. Therefore, it is very necessary to develop high-efficiency UV-absorbing materials to avoid the adverse effects of UV radiation. [0003] At present, there are two main categories of UV absorbers, namely inorganic metal oxides or organic small ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/06C08F212/08C08F220/36
CPCC08F212/08C08F222/06C08F218/08C08F220/36
Inventor 东为富刘晓锦汪洋李婷张正白绘宇张胜文马丕明陈明清
Owner JIANGNAN UNIV
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