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A kind of photocuring polyurea nanoparticle and its preparation method and application

A nano-particle and light-curing technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as easy precipitation, coating extinction, coating optical properties, etc., to achieve high transparency, good wear resistance and scratch resistance The effect of the function

Active Publication Date: 2022-04-05
SUMDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, organic microspheres are becoming more and more common in the application of coatings. They can provide coatings with functions such as wear resistance and scratch resistance, but their micron-level particle sizes can easily cause coating matting, seriously affecting the coating Transparency, which has a great influence on the optical properties of the coating
Inorganic nanoparticles widely used in the market, such as nano-silicon oxide, nano-alumina, etc., generally have a relatively high refractive index, which is relatively different from the refractive index of the organic components of the coating, which seriously affects the coating. Optical transmittance, while the compatibility of inorganic nanoparticles and organic components is relatively poor, and it is easier to precipitate

Method used

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  • A kind of photocuring polyurea nanoparticle and its preparation method and application
  • A kind of photocuring polyurea nanoparticle and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Add 100 parts of toluene / butanone (mass ratio 1:2) into the reactor, then add 32.7 parts of isophorone diisocyanate, stir and disperse while cooling down to -10°C, add 20 parts of isophorone diisocyanate dropwise Amine, control the temperature to be less than 10°C, dropwise is completed, keep warm, and disperse at high speed for 2 hours; add 0.2 parts of p-hydroxyanisole, 0.1 part of organotin catalyst, 6.8 parts of hydroxyethyl acrylate, heat up to 70°C, and keep warm for 2 hours Cool down to room temperature, filter, add 50 parts of toluene / butanone (mass ratio 1:2) to the filter cake, ultrasonically disperse, filter, and dry to obtain photocurable polyurea nanoparticles UA-1.

Embodiment 2

[0034] Add 100 parts of methylcyclohexane / butyl acetate (mass ratio 1:1) into the reactor, then add 30 parts of dicyclohexylmethane diisocyanate, stir and disperse while cooling down to -10°C, dropwise add 15.6 part of isophorone diamine, control the temperature to be less than 10°C, dropwise is completed, keep warm, and disperse at high speed for 2 hours; add 0.2 part of p-hydroxyanisole, 0.1 part of organotin catalyst, 3.6 parts of hydroxybutyl acrylate, heat Heat at 70°C for 2 hours; cool down to room temperature, filter, add 50 parts of methylcyclohexane / butyl acetate (mass ratio 1:1) to the filter cake, ultrasonically disperse, filter, and dry to obtain photocured polyurea nano Particle UA-2.

Embodiment 3

[0036] Add 120 parts of toluene / butyl acetate (mass ratio 1:2) into the reactor, then add 25 parts of hexamethylene diisocyanate, stir and disperse while cooling down to 0°C, add dropwise 26.8 parts of dodecane diisocyanate Amine, control the temperature to be less than 15°C, dropwise is completed, keep warm, and disperse at high speed for 1.5 hours; add 0.2 parts of p-hydroxyanisole, 0.1 parts of organotin catalyst, 10.2 parts of caprolactone acrylate, heat up to 80°C, keep warm for 2 Hours; cool down to room temperature, filter, add 50 parts of toluene / butyl acetate (mass ratio 1:2) to the filter cake, ultrasonically disperse, filter, and dry to obtain photocurable polyurea nanoparticles UA-3.

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Abstract

The invention discloses a photocurable polyurea nanoparticle and its preparation method and application. 0.02-0.5 parts catalyst, 0.02-0.5 parts polymerization inhibitor. In the present invention, polyurea is formed by reacting diamine with isocyanate, and then capped with acrylate with hydroxyl group, so as to prepare a polyurea nanoparticle with photocuring function, which overcomes the currently widely used organic microsphere and inorganic nanoparticle The impact on the optical properties of the coating, the particle size of the photocurable polyurea nanoparticles is less than 400nm, the coating prepared by it has high transparency, and can provide the coating with better wear resistance and scratch resistance.

Description

technical field [0001] The invention relates to the technical field of light-curing materials, in particular to a light-curing polyurea nanoparticle and its preparation method and application. Background technique [0002] At present, organic microspheres are becoming more and more common in the application of coatings. They can provide coatings with functions such as wear resistance and scratch resistance, but their micron-level particle sizes can easily cause coating matting, seriously affecting the coating Transparency has a great influence on the optical properties of the coating. Inorganic nanoparticles widely used in the market, such as nano-silicon oxide, nano-alumina, etc., generally have a relatively high refractive index, which is relatively different from the refractive index of the organic components of the coating, which seriously affects the coating. Optical transmittance, while the compatibility of inorganic nanoparticles and organic components is relatively ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/32C09D175/14C09D175/02
CPCC08G18/672C08G18/3234C08G18/3228C09D175/14C08L2205/02C08L75/02
Inventor 赵东理刘姗姗孙启龙吴烨飞
Owner SUMDA MATERIAL TECH CO LTD
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