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Graft-modified high-molecular anti-fog coating, and preparation method and application method thereof

An anti-fog coating, graft modification technology, applied in the direction of coating, can solve the problem of short duration, increase water resistance and durability, good hydrophilicity, and solve the problem of fogging

Pending Publication Date: 2020-06-30
SUZHOU WHOLENANO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of surfactant materials as anti-fog materials usually only lasts for a few hours, and in a high-humidity environment, the duration is shorter

Method used

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  • Graft-modified high-molecular anti-fog coating, and preparation method and application method thereof

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preparation example Construction

[0037] A preparation method of graft modified macromolecular anti-fog coating, comprising the following steps:

[0038] At 80-95°C, dissolve the long-chain polymer containing polyhydroxyl functional groups into the solvent, then add a metal salt catalyst, add a predetermined proportion of silane according to the controlled grafting rate, and react at 45-65°C for 12- After 24 hours, add nano-titanium dioxide, continue to stir and react for 2-6 hours to obtain the desired product, wherein the grafting rate is 5-50%.

[0039] A method for applying a graft-modified polymer anti-fog coating, comprising the following steps: first cleaning the surface of an article to be treated, then applying the graft-modified polymer anti-fog coating to the surface of the item to be treated, leaving it to dry or heating Drying is sufficient, and the water contact angle on the surface of the article after treatment with the grafted modified polymer anti-fog coating is <10°.

Embodiment 1

[0041] A preparation method of graft modified macromolecular anti-fog coating, comprising the following steps:

[0042] Step 1, preparing a mixed solvent of water and ethanol, wherein the volume ratio of ethanol is 20%;

[0043] Step 2. Dissolve 2g of long-chain polymer polyvinyl alcohol (molecular weight 2500) containing polyhydroxyl functional groups into 50g of the solvent obtained in step 1 at 80°C, then add 0.001g of the metal salt catalyst copper acetate, and add it under stirring. 1 g of silane was reacted at 45° C. for 24 h, then 0.1 g of nano-titanium dioxide was added, and the stirring reaction was continued for 2 h to obtain the desired product with a grafting rate of 50%.

Embodiment 2

[0045] A preparation method of graft modified macromolecular anti-fog coating, comprising the following steps:

[0046] Step 1, prepare mixed solvent, the volume ratio of ethanol is 75%;

[0047] Step 2. Dissolve 20g of long-chain polymer polyvinyl alcohol (molecular weight 10,000) containing polyhydroxy functional groups at 95°C into 100g of the solvent obtained in step 1, then add 0.1g of metal salt catalyst copper acetate, and add 2g of silane was reacted at 65°C for 12h, then 1g of nano-titanium dioxide was added, and the stirring reaction was continued for 2h to obtain the desired product with a grafting rate of 5%.

[0048] The rest are the same as embodiment 1.

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Abstract

The invention relates to a graft-modified high-molecular anti-fog coating as well as a preparation method and an application method thereof. The graft-modified high-molecular anti-fog coating is prepared from the following components: a long-chain polymer containing polyhydroxy functional groups, silane, a metal salt catalyst, a solvent and nano titanium dioxide, the preparation method comprises the following steps: dissolving the long-chain polymer containing polyhydroxy functional groups into the solvent at 80-95 DEG C, adding the metal salt catalyst, adding a preset proportion of silane according to the grafting rate, reacting at 45-65 DEG C, adding nano titanium dioxide, and continuously stirring to react, thereby obtaining the required product. The invention provides the graft-modified high-molecular anti-fog coating as well as the preparation method and the application method thereof. The metal salt is used as a catalyst, hydrophilic groups are grafted on the surface of the polymer in a grafting modification mode, compared with a cross-linking mode, the method is more stable and controllable, nano titanium dioxide particles are added for modification, water resistance and durability are improved, and the product is used for glasses, goggles, automobiles, bathrooms and the like, is widely suitable for macromolecule resin, glass, stone and other materials, and can solve thefogging problem.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a graft-modified macromolecular anti-fog coating, a preparation method and an application method. Background technique [0002] The phenomenon of fogging occurs because water vapor liquefies on the surface of the lens to form small water droplets, which refracts and reflects light, resulting in blurred vision. The generation of fogging will affect people's work and life. For example, in the outbreak of new coronavirus pneumonia in my country in early 2020, the fogging of medical staff's goggles seriously affected their treatment of patients. [0003] The angle between the water droplet and the solid surface is called the water contact angle. The water contact angle reflects the "wetting properties" of the solid surface to a certain extent, and also determines the state of the water droplet on it. For a certain solid surface, when the water contact angle tends to 0°,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C09D183/12C09D7/61C08G77/46C08G77/442
CPCC09D183/10C09D183/12C09D7/61C09D7/67C09D7/68C08G77/46C08G77/442C08K2201/011C08K2003/2241C08K2201/003C08K2201/006
Inventor 朱红军
Owner SUZHOU WHOLENANO NEW MATERIAL TECH CO LTD
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