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Preparation method of superhydrophilic transparent anti-fog coating

An anti-fog coating and super-hydrophilic technology, applied in the coating and other directions, can solve the problems of mechanical friction resistance, easy peeling off of the coating film, and short service life, and achieve good water resistance, easy operation, and short production cycle. Effect

Active Publication Date: 2017-06-23
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For physical blending, it is mainly to introduce the hydrophilic agent into the surface of the substrate through physical blending of the hydrophilic agent and the polymer. The method is simple and easy, but the coating film is easy to fall off when cleaning, has poor water resistance, and has a short service life (Plasman V.,Caulier T.,Boulos N.Polyglycerol esters demonstrate superior antifogging properties for films.Plast.Addit.Compd.2005,7,30-33); Substrate surface modification method can improve the bonding force and surface Hydrophilicity, but due to the presence of hydrophilic groups, the coating is soft and not resistant to mechanical friction, and the coating is soft and not resistant to friction (Howarter J-A., Youngblood J-P.Self-cleaning and anti-fog surfaces via stimuli- responsive polymerbrushes.Adv.Mater.2007,19,3838-3843); for the chemical bonding method, the introduction of hydrophilic functional groups by chemical synthesis, but due to the introduction of hydrophilic groups in the coating, the water resistance of the coating should be considered can improve the overall performance of the coating through moderate cross-linking

Method used

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  • Preparation method of superhydrophilic transparent anti-fog coating

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specific Embodiment approach

[0025] A kind of preparation method of superhydrophilic transparent anti-fog coating, it comprises the following steps:

[0026] (1), prepare polyurethane prepolymer:

[0027] Add diisocyanic acid monomer, hydroxy acrylate and organic solvent A into the reaction vessel, wherein the molar ratio of diisocyanic acid monomer to hydroxy acrylate is 0.7:1-1:1, hydroxy acrylate and organic solvent A The molar ratio is 3:7-1:1, then dibutyltin dilaurate is added as a catalyst, the amount of catalyst is 0.1-1% of the mass of diisocyanate monomer, and the above mixture is reacted at 50-70°C for 2 -4h, obtain polyurethane prepolymer;

[0028] (2), prepare the superhydrophilic prepolymer of polysorbate modification:

[0029] Polysorbate is dissolved with organic solvent B and added to the polyurethane prepolymer prepared above, wherein, in the mixed solution of polysorbate and organic solvent B, the mass concentration of polysorbate is 50-80%, polysorbate The molar ratio of sorbate to ...

Embodiment 1

[0034] Embodiment 1: a kind of preparation method of superhydrophilic transparent anti-fog coating, it comprises the following steps:

[0035] (1), prepare polyurethane prepolymer:

[0036] In a 250ml four-neck bottle, mix 4,4,-dicyclohexylmethyl diisocyanate monomer and hydroxymethyl methacrylate into the organic solvent ethylene glycol methyl ether, in which 4,4,-dicyclohexylmethyl The molar ratio of base diisocyanate monomer and methylol methacrylate is 0.7:1, then add catalyst dibutyltin dilaurate, the consumption of dibutyltin dilaurate is 0.1% of the quality of methylol methacrylate, methyl The molar ratio of hydroxymethyl acrylate to the organic solvent ethylene glycol methyl ether is 3:7, and the above mixture is reacted at 60° C. for 2 hours to obtain a polyurethane prepolymer;

[0037] (2), prepare the superhydrophilic prepolymer of polysorbate modification:

[0038] Polysorbate 80 is dissolved with organic solvent ethylene glycol methyl ether and added in the poly...

Embodiment 2

[0042] Embodiment 2: a kind of preparation method of superhydrophilic transparent anti-fog coating, it comprises the following steps:

[0043] (1), prepare polyurethane prepolymer:

[0044] In a 250ml four-necked bottle, mix 1,6-hexamethylene diisocyanate monomer and hydroxybutyl methacrylate into the organic solvent cyclohexane, wherein 1,6-hexamethylene diisocyanate monomer and hydroxybutyl methacrylate The molar ratio is 0.8:1, then add catalyst dibutyltin dilaurate, the consumption of dibutyltin dilaurate is 0.5% of hydroxybutyl methacrylate quality, the mole of hydroxybutyl methacrylate and organic solvent cyclohexane The ratio is 4:6, and the above mixture is reacted at 50°C for 3h to obtain a polyurethane prepolymer;

[0045] (2), prepare the superhydrophilic prepolymer of polysorbate modification:

[0046] Polysorbate 40 is dissolved with organic solvent acetone and added to the above polyurethane prepolymer, wherein the mass concentration of polysorbate in solvent a...

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Abstract

The invention relates to a preparation method of a super hydrophilic transparent anti-fog coating. The preparation method comprises the following steps: forming prepolymer by reaction on hydroxyethyl acrylate and diisocyanate, carrying out hydrophilic modification by polysorbate, and carrying out UV radiation curing on the modified prepolymer so as to form super hydrophilic coating. The contact degree of the coating to water is 3 degrees, the hardness is 2H, the anti-fog performance is excellent, the light transmittance is 91% for meeting the anti-fog requirement of a transparent panel, certain waterproof performance is achieved and the combination property is excellent. The preparation process of the super hydrophilic transparent anti-fog coating is simple, and strong industrialization capability and application prospect are achieved.

Description

technical field [0001] The invention relates to an anti-fog coating, in particular to a preparation method of a super-hydrophilic transparent anti-fog coating. Background technique [0002] Transparent materials such as glass and plastic are indispensable materials in people's daily life, but when there is a certain temperature difference between the two sides separated from each other, the saturated vapor pressure of the water on the surface with low temperature is lower than the vapor pressure of the surrounding environment, and the water vapor will Agglomerated on the surface of the object to form tiny water droplets, these water droplets form a diffuse reflection of light, reduce the light transmittance of these materials, and bring a lot of inconvenience to people. For example, the atomization on the surface of glasses makes people's vision blurred; the atomization of automobile windshields brings a lot of hidden dangers to traffic accidents; for solar energy devices, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D157/12C08F283/00C08F220/18C08F222/20C08F299/06C08F2/48C08G18/67C08G18/48
CPCC08F2/48C08F283/00C08G18/10C08G18/4883C08G18/672C09D151/08C08G18/48
Inventor 洪杰詹俊英林金斌王艳方江海林伟
Owner SKSHU PAINT
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