Method for preparing water absorbent anti-fog film used for automotive glass

A technology for automotive glass and water absorption is applied in the field of preparation of a water-absorbent anti-fog film for automotive glass, which can solve the problems of loss of anti-fog effect, low bonding force between surfactant and glass surface, etc., and achieve long-term anti-fog performance, The effect of avoiding glass fogging and avoiding influence

Active Publication Date: 2013-12-25
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

According to relevant tests, turning on the air conditioner to defog will increase the power consumption by 10-15%
[0003] Therefore, it is very necessary to develop spontaneous anti-fog technology. At present, there are many anti-fog agents and anti-fog towel products on the market. The main components are all surfactants, which have a certain anti-fog effect. Very low binding power, loses anti-fog effect after a short period of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Preparation of water-absorbent resin

[0020] Add 30 parts of oxyalkylene polyol resin, molecular weight 400, 33 parts of acrylic polyol resin to 100 parts of ethyl acetate, stir evenly, add 50 parts of TDI-based aromatic isocyanate and 1 part of polyether alkyl siloxane Leveling agent, water absorbent resin is obtained after stirring evenly.

[0021] 2. Preparation of anti-fog film

[0022] First, the surface of the car glass is degreasing with a mixture of methanol and water, then physically polished, washed with tap water and distilled water respectively, and then dried for later use.

[0023] The glass surface is coated with a water-absorbent resin system on the clean and dry surface of automobile glass, and the coating process adopts roller coating.

[0024] After the film is leveled, place the glass in an anti-fog environment of 120°C for 1.5h. The film layer has good anti-fog performance, the anti-fog time is 15min, and the permeability of the glass after c...

Embodiment 2

[0026] 1. Preparation of water-absorbent resin.

[0027] Add 40 parts of oxyalkylene polyol resin, molecular weight 1000, 45 parts of polycaprolactone polyol resin to 80 parts of acetone, stir evenly, add 60 parts of curing agent aliphatic isocyanate and 1.5 parts of high molecular weight polysiloxane , and the water-absorbent resin is obtained after stirring evenly.

[0028] 2. Preparation of anti-fog film layer.

[0029] First, the surface of the automobile glass is degreasing with ethanol, and then physically polished, and then washed with tap water and distilled water respectively, and then dried for use.

[0030] The glass surface is coated with a water-absorbent resin system on the clean and dry glass surface, and the coating process is spin coating.

[0031] After the film is leveled, place the glass in an anti-fog environment of 130°C for 2 hours. The film layer has good anti-fog performance, the anti-fog time is 18min, and the permeability of the glass after coatin...

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PUM

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Abstract

The invention relates to a method for preparing a water absorbent anti-fog film used for automotive glass. The method comprises the following steps: step 1, preparing water absorbent resin from raw materials in parts by weight as follows: adding 10-40 parts of resin containing water absorbent groups and 10-50 parts of crosslinkable cured resin to 50-100 parts of organic solvents, mixing up, adding 20-60 parts of curing agent and 1-5 parts of flatting agent. mixing up and obtaining the water absorbent resin; step 2, preparing the anti-fog film: sequentially degreasing the surface of the automotive glass with the organic solvent, performing mechanical polishing, rinsing with tap water and distilled water respectively, and desiccating; performing surface coating on the clean and dry automotive glass with the water absorbent resin prepared according to the step 1, and placing the water absorbent anti-fog film at a temperature of 80-150 DEG C for 0.5-4h after the leveling of the water absorbent anti-fog film. The water absorbent anti-fog film provided by the invention can absorb and desorb steam without creating fog on the glass, and has a long-term anti-fog function.

Description

technical field [0001] The invention relates to a material surface treatment method, in particular to a preparation method of a water-absorbing anti-fog film layer for automobile glass. Background technique [0002] In the cold winter or rainy season, the water vapor in the hot air in the car will form fog droplets on the surface of the cold glass, which greatly reduces the visible light transmittance of the glass, affects the driver's vision, and easily leads to traffic accidents. Because there is no hot air from the engine in an electric vehicle, it is necessary to turn on the air conditioner to remove fog. According to relevant tests, the power consumption of air conditioner defogging will increase by 10-15%. [0003] Therefore, it is necessary to develop spontaneous anti-fogging technology. At present, there are many anti-fogging agents and anti-fogging towels on the market. The main components are surfactants, which have a certain anti-fogging effect. However, the diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/32
Inventor 熊建民洪丽陈大华
Owner CHERY AUTOMOBILE CO LTD
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