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Photocuring anti-doodling coating with self-healing function and preparation method and application thereof

A light-curing and anti-graffiti technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of reduced surface anti-graffiti, easy loss of surface efficacy, and difficulty in large-scale construction.

Active Publication Date: 2021-05-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following problems in anti-graffiti coatings: (1) the surface effect is easy to lose; (2) the coating process is complicated; (3) it is not easy to carry out large-scale construction
Although the anti-graffiti and weather resistance of the coatings prepared by the above method have been significantly improved, the surface anti-graffiti properties of these coatings will decline after experiencing multiple physical wears from the outside world, and they will not have self-repairing functions. Affect the long-term service of the coating

Method used

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  • Photocuring anti-doodling coating with self-healing function and preparation method and application thereof
  • Photocuring anti-doodling coating with self-healing function and preparation method and application thereof
  • Photocuring anti-doodling coating with self-healing function and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036](1) First add 100mL ethanol and 1.2 parts by mass of tridecafluorooctyltriethoxysilane (the mass volume ratio of fluorosilane to ethanol is 12g / L) into a 250mL beaker, stir well and then add 9 parts by mass of titanium dioxide Nanoparticles and 0.6 parts by mass of ammonia water (mass fraction: 28%) were sonicated for 10 minutes, stirred and reacted at a temperature of 60° C. for 24 hours, washed and dried to obtain modified titanium dioxide nanoparticles.

[0037] (2) Dissolve 4 parts by mass of isophorone diisocyanate, 7 parts by mass of polyethylene glycol (molecular weight: 400g / mol) and 8 parts by mass of hydroxyl-terminated fluorine-containing silicone oil (molecular weight: 1000g / mol) in 10 parts by mass A homogeneous mixed solution was obtained in acetone and 0.2 parts by mass of dibutyltin dilaurate was added, and after stirring and reacting at 60°C for 4 hours, the temperature was slowly lowered to 40°C, and then 5 parts by mass of pentaerythritol triacrylate, 0...

Embodiment 2

[0040] (1) First add 130mL tetrahydrofuran and 1.5 parts by mass of heptadecafluorodecyltrimethoxysilane (the mass volume ratio of fluorosilane to tetrahydrofuran is 11.5g / L) into a 250mL beaker, stir well and then add 8 parts by mass of Silicon oxide nanoparticles and 1 mass part of ammonia water (mass fraction: 28%) were sonicated for 10 minutes, stirred and reacted at a temperature of 65° C. for 24 hours, washed and dried to obtain modified silica nanoparticles.

[0041] (2) Dissolve 2 parts by mass of hexamethylene diisocyanate, 9 parts by mass of polycarbonate diol (molecular weight: 1000g / mol) and 6 parts by mass of hydroxyl-terminated fluorosilicone oil (molecular weight: 2000g / mol) in 20 mass parts 0.2 parts by mass of pentamethyldiethylenetriamine was added to obtain a uniform mixed solution in 4 parts of tetrahydrofuran, and after stirring and reacting at 60°C for 5 hours, the temperature was slowly lowered to 40°C, and 4 parts by mass of dipentaerythritol pentaacryla...

Embodiment 3

[0044] (1) First add 120mL butyl acetate and 2 parts by mass of dodecafluoroheptylpropyltrimethoxysilane (the mass volume ratio of fluorosilane to butyl acetate is 16.7g / L) into a 250mL beaker, stir well Then add 10 parts by mass of zirconia nanoparticles and 1.5 parts by mass of ammonia water (28% by mass), sonicate for 15 minutes, stir and react at a temperature of 65° C. for 24 hours, wash and dry to obtain modified zirconia nanoparticles.

[0045] (2) Dissolve 4.5 parts by mass of hexamethylene diisocyanate, 8 parts by mass of polypropylene glycol (molecular weight: 600g / mol) and 9 parts by mass of hydroxyl-terminated fluorosilicone oil (molecular weight: 1000g / mol) in 15 parts by mass of tetrahydrofuran Obtain a uniform mixed solution and add 0.3 parts by mass of N,N'-lutidine, stir and react at 60°C for 4 hours, then slowly cool down to 40°C, and add 6 parts by mass of -β-hydroxyethyl methacrylate, 0.1 part of hydroquinone as a polymerization inhibitor and 10 parts of te...

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Abstract

The invention discloses a photocuring anti-doodling coating with a self-healing function and a preparation method and application thereof. The photocuring anti-doodling coating is mainly prepared by blending ultraviolet-curable polyurethane resin, a reactive diluent, hydrophobic modified nanoparticles, a photoinitiator and an auxiliary agent; the photocuring anti-doodling coating is prepared from the following components in parts by weight: 10 to 70 parts of UV-curable polyurethane resin, 10 to 40 parts of reactive diluent, 5 to 30 parts of modified nano particles, 0.5 to 10 parts of photoinitiator and 0.1 to 10 parts of additive. A coating layer formed after the coating is coated is good in surface uniformity and smoothness and low in surface energy, and doodling substances and dirt are difficult to permeate into the coating film; meanwhile, after the surface of the coating is physically abraded, hydrophobic substances in the coating can migrate to the surface under damp and hot conditions to automatically repair the damaged surface, so that the anti-doodling performance of the coating is recovered, and the durability of the coating used outdoors is ensured.

Description

technical field [0001] The invention belongs to anti-graffiti coatings, in particular to a light-curing anti-graffiti coating with self-healing function and its preparation method and application. Background technique [0002] In recent years, the phenomenon of graffiti on urban buildings and public facilities has become increasingly serious, which not only seriously affects the image of a city, but also brings great troubles to advertising management. Therefore, the coatings industry is facing a huge challenge to develop coatings with anti-graffiti properties. Anti-graffiti paint is a kind of paint with special surface function, the surface has low surface tension, the dirt will roll off naturally, and the self-adhesive paper will fall off easily after being pasted. Designed to remove graffiti with easy cleanup, simply water if possible. However, there are still the following problems in the anti-graffiti paint: (1) the surface effect is easily lost; (2) the coating proce...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/62
CPCC09D175/14C09D7/62C08K2201/011C08K2003/2241C08K2003/2244C08K2003/2227C08K9/06C08K3/22C08K3/36
Inventor 陈坤林周建林衡天佐张钧皓
Owner JIANGNAN UNIV
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