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Exterior coating antifogging film and preparation method

An anti-fog film and coating technology, applied in the direction of coating, etc., can solve problems such as easy to cause disease, rot, and affect the light transmittance of agricultural shed film, and achieve the effect of simple coating method and simple curing method

Inactive Publication Date: 2005-10-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of fog and water droplets leads to light reflection, diffuse reflection and lens effect, which directly affects the light transmittance of agricultural shed film
In addition, water droplets dripping on the plants are prone to diseases and rot.

Method used

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  • Exterior coating antifogging film and preparation method

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Embodiment

[0038] Recipe 1 (Coat 1):

[0039] γ-(Methylpropyloxy)propyltrimethoxysilane (KH-70), 5.0g, was hydrolyzed with a small amount of hydrochloric acid, and 2.0g of acetic acid was added at the same time to adjust the pH to about 2.0. While stirring, add 6.5 grams of hydrolyzed tetraethyl orthosilicate and butyl titanate, add 0.1 grams of benzophenone (dissolved with a small amount of ethanol), and let it stand. The coating is dried at 60°C for 0.5 hours, then at a wavelength of 270-420nm, with a light intensity of 35mw / cm 2 Irradiated under a UV mercury lamp for 2 min.

[0040] Recipe 2 (Coating 2):

[0041] γ-(2,3-Glycidoxy)propyltrimethoxysilane (KH-60), 3.0 grams, hydrolyzed with a small amount of hydrochloric acid, and at the same time, 2.0 grams of malonic acid was added to adjust the pH to about 3.5. While stirring, add 7.5 grams of hydrolyzate of ethyl orthosilicate and 5.0 grams of hydrolyzate of butyl titanate, stir and disperse at high speed with a high-speed dispers...

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Abstract

The present invention provides a new externally-coated fog-resisting film and its preparation method. It is characterized by that said invention adopts inorganic-organic coating process on the plastic film surface to prepare fog-resisting film. The described fog-resisting film has a double-coating structure, first coating layer is coated on the base film, it is a mixture obtained by using silane coupling agent and one or two kinds of ethyl orthosilicate and butyl titanate through hydrolysis reaction, after the first coating layer is solidified by means of heating or UV-light irradiation, on said layer of solidified film a second coating layer is coated, and said second coating layer also is a mixture formed from silane coupling agent and one or two kinds of ethyl orthosilicate and butyl titanate through hydrolysis reaction, and also is solidified by means of heating or UV-light irradiation.

Description

technical field [0001] The invention relates to an anti-fog film and a preparation method thereof, in particular to a preparation method of an externally-coated anti-fog film. Background technique [0002] Due to its hydrophobicity, the surface of the plastic film will condense or atomize when the surface temperature of the plastic film reaches below the dew point or the water vapor in the air reaches supersaturation when used as an agricultural film. The existence of fog and water droplets leads to light reflection, diffuse reflection and lens effect, which directly affects the light transmittance of agricultural shed film. In addition, water droplets dripping on the plants are prone to diseases and rot. [0003] In the production of greenhouse film, anti-fogging agent (a variety of non-ionic surfactants and their complexes composed of long carbon chain lipophilic groups and hydrophilic groups) is usually used, or the method of spraying dripping agents on the surface of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06
Inventor 赵敏张振峰徐亦秋李志祥罗小伟
Owner EAST CHINA UNIV OF SCI & TECH
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