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A kind of light curing anti-graffiti paint with self-healing function and its preparation method and application

A light-curing and anti-graffiti technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of no self-repair function, the decline of surface anti-graffiti performance, and the long-term service of the coating, so as to achieve less energy consumption, The function is not easy to lose, and the effect of high-quality weather resistance

Active Publication Date: 2022-06-28
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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  • A kind of light curing anti-graffiti paint with self-healing function and its preparation method and application
  • A kind of light curing anti-graffiti paint with self-healing function and its preparation method and application
  • A kind of light curing anti-graffiti paint with self-healing function and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036](1) First add 100 mL of ethanol and 1.2 parts by mass of tridecafluorooctyltriethoxysilane (the mass volume ratio of fluorosilane to ethanol is 12 g / L) in a 250 mL beaker, and then add 9 parts by mass of titanium dioxide after stirring evenly 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) 4 parts by mass of isophorone diisocyanate, 7 parts by mass of polyethylene glycol (molecular weight: 400 g / mol) and 8 parts by mass of hydroxyl-terminated fluorine-containing silicone oil (molecular weight: 1000 g / mol) were dissolved in 10 parts by mass A uniform mixed solution was obtained in acetone, 0.2 parts by mass of dibutyltin dilaurate was added, and the reaction was stirred at 60 °C for 4 hours, then slowly cooled to 40 °C, and then 5 parts by mass of pentaerythritol triacrylate, 0....

Embodiment 2

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

[0041] (2) 2 parts by mass of hexamethylene diisocyanate, 9 parts by mass of polycarbonate diol (molecular weight: 1000 g / mol) and 6 parts by mass of hydroxyl-terminated fluorosilicone oil (molecular weight: 2000 g / mol) were dissolved in 20 parts by mass of 0.2 parts by mass of pentamethyldiethylenetriamine was added into the tetrahydrofuran and 0.2 parts by mass of pentamethyldiethylenetriamine was added. After stirring and reacting at 60 ° C for 5 hours, the temperature was slowly lowered to 40 ° C. Then 4 parts by mass of dipenta...

Embodiment 3

[0044] (1) First add 120 mL of butyl acetate and 2 parts by mass of dodecafluoroheptylpropyl trimethoxysilane (the mass volume ratio of fluorosilane to butyl acetate is 16.7 g / L) in a 250 mL beaker, and after stirring evenly 10 parts by mass of zirconium dioxide nanoparticles and 1.5 parts by mass of ammonia water (28% by mass) were added, and after sonication for 15 minutes, the reaction was stirred at a temperature of 65° C. for 24 hours, washed and dried to obtain modified zirconium dioxide nanoparticles.

[0045] (2) 4.5 parts by mass of hexamethylene diisocyanate, 8 parts by mass of polypropylene glycol (molecular weight: 600 g / mol) and 9 parts by mass of hydroxyl-terminated fluorine-containing silicone oil (molecular weight: 1000 g / mol) were dissolved in 15 parts by mass of tetrahydrofuran A uniform mixed solution was obtained, 0.3 parts by mass of N,N'-lutidine was added, and after stirring and reacting at 60 °C for 4 hours, the temperature was slowly lowered to 40 °C, a...

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Abstract

The invention discloses a photocurable anti-graffiti coating with self-healing function and its preparation method and application. It is made by blending with other agents; the parts by weight are: 10-70 parts of UV-curable polyurethane resin, 10-40 parts of reactive diluent, 5-30 parts of modified nanoparticles, and 0.5-10 parts of photoinitiator , 0.1 to 10 parts of additives. The coating formed after the coating of the present invention is coated has good surface uniformity and flatness, low surface energy, and graffiti and dirt are difficult to penetrate into the coating film; meanwhile, after the coating surface is subjected to physical abrasion, the hydrophobic substances in the coating Under hot and humid conditions, it will migrate to the surface and repair the damaged surface by itself, so that its anti-graffiti performance can be restored, thus ensuring the durability of the coating for outdoor use.

Description

technical field [0001] The invention belongs to an anti-graffiti paint, and in particular relates to a light-curing anti-graffiti paint with self-healing function and a preparation method and application thereof. Background technique [0002] In recent years, the phenomenon of graffiti scribbled in urban buildings and public facilities has become increasingly serious, which not only seriously affects the image of a city, but also brings great trouble to advertising operations. Therefore, the coatings industry is faced with a huge challenge, which is the need 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 rolls off naturally, and it will fall off easily after the sticker is attached. Designed to remove graffiti with an easy clean-up method, using only water if possible. However, the anti-graffiti coatings currently have the following problems: (1) the surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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