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Antifogging coating, special antifogging coating composition and antifogging product thereof

An anti-fog coating and composition technology, applied in the direction of coating and the like, can solve the problems such as the lack of widespread promotion of anti-fog functional coatings, insufficient anti-fog duration, and poor anti-fog surface hardness, and achieve excellent anti-fog properties, The effect of good surface smoothness and clarity, good water resistance

Inactive Publication Date: 2009-12-02
BEIJING RIBIO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These reported anti-fog coatings have certain anti-fog effects, but there are deficiencies in each method, or the anti-fog duration is not enough, or the anti-fog surface hardness is too poor, or the water resistance is not good, or the production cost too high
The surface with high surface energy formed by hydrophilic polymer, its hydrophilicity and hardness are often two contradictory aspects, it is difficult to perfectly unify them in the same system
This is also why there are so many patents and literature reports about anti-fog so far, and from the product market point of view, mature anti-fog functional coatings have not yet been widely promoted.

Method used

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  • Antifogging coating, special antifogging coating composition and antifogging product thereof
  • Antifogging coating, special antifogging coating composition and antifogging product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1, preparation has the PET product of anti-fog coating

[0045] With the aqueous solution of 100g 60% polyacrylic acid-polyacrylamide-2-methylpropanesulfonic acid (Shandong Taihe Water Treatment Co., Ltd.) (average molecular weight is 2000Da), 1.5g aziridine cross-linking agent CX100 (DSM company) , 10g particle diameter is the hydrosol (concentration is 50%) of the silica nanoparticle (Nissan Chemical Industries, Ltd.) of 20nm of 20nm and mixes, and adding a small amount of hydrochloric acid that is 1mol / L in the above-mentioned mixture, adjusts the pH value 2 to 4, and then add 0.3g silane coupling agent TEOS (tetraethyl orthosilicate) (Beijing Jingyi Chemical). The above mixture was coated on the surface of PET (polyethylene terephthalate) with a wire bar, and the PET was dried at 120° C. for 5 minutes to obtain a PET article with an anti-fog coating thickness of 1 μm.

[0046] Determination of physical properties:

[0047] Anti-fog performance: >1 minut...

Embodiment 2

[0053] Embodiment 2, preparation has the PC product of anti-fog coating

[0054] With the aqueous solution of 100g 40% polyacrylic acid-polyacrylamide-2-methylpropanesulfonic acid-polyacrylic acid (2-hydroxyethyl) ester (Shandong Taihe Water Treatment Co., Ltd.) (average molecular weight is 2000Da), 4g aziridine Crosslinking agent CX100, 200g particle diameter is the silica nanoparticle hydrosol (concentration is 30%) of 8nm and mixes, and adding a small amount of hydrochloric acid that concentration is 1mol / L in the above-mentioned mixture, adjusts the pH value to be 2 to 4, additionally Add 3g of silane coupling agent KH560 (glycidyl ether propyltrimethoxysilane) (Nanjing Nengde Chemical Co., Ltd.) and stir evenly. Use a wire rod to coat the above mixture on the surface of PC (polycarbonate), and place PC on Dry at 150° C. for 2 minutes to obtain a PC product with an anti-fog coating thickness of 5 μm.

[0055] Determination of physical properties:

[0056] Anti-fog perfor...

Embodiment 3

[0062] Embodiment 3, prepare the PMMA goods with anti-fog coating

[0063] With 100g 30% polyacrylic acid-propenyl alkyl ether sodium sulfonate (Aldrich imported reagent) (average molecular weight is 7000Da) aqueous solution, 0.3g aziridine crosslinking agent CX100, 100g particle diameter is the silica nanoparticle of 5nm Mix the hydrosol (concentration is 30%), add a small amount of hydrochloric acid with a concentration of 1mol / L to the above mixture, adjust the pH value from 2 to 4, and add 2.5g of silane coupling agent TEOS (tetraethyl orthosilicate) to stir Evenly, the above mixture is coated on the surface of PMMA with a wire rod, and the PMMA is dried at 100° C. for 15 minutes to obtain a PMMA product with an anti-fog coating thickness of 2 μm.

[0064] Determination of physical properties:

[0065] Anti-fog performance: >1 minute (50°C water vapor), qualified;

[0066] Surface hardness: H;

[0067] Abrasion resistance (750g, 500r) g: 0.03;

[0068] Cohesion: <95%, ...

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Abstract

The invention discloses an antifogging coating, a special antifogging coating composition and a special antifogging product thereof. The antifogging coating composition comprises the following components: 0.5 to 58 mass portions of homopolymer or copolymer taking acrylic acid or methylacrylic acid as a monomer, 0.05 to 6 mass portions of aziridine crosslinking agent, 0.5 to 58 mass portions of inorganic nano-particles and 40 to 98 mass portions of solvent. The coating composition has excellent antifogging property and excellent water resistance; the coating has high bonding strength with a substrate; and the antifogging coating formed by coating the substrate of the coating has good surface hardness. The antifogging product coated with the antifogging coating has excellent surface smoothness and clearness, excellent appearance, high surface strength and good wear resistance, and can be used for bathroom mirrors, eyeglasses, helmets, safety glasses, automobile lampshades, instrument panels and the like.

Description

technical field [0001] The invention relates to an anti-fog coating, a special anti-fog coating composition and an anti-fog product. Background technique [0002] There are a large number of optical-related objects or materials in life, such as automobile glass, window glass of buildings, bathroom mirrors, instrument panels, glasses, protective glasses and so on. However, in places with high humidity or large temperature differences, fog that affects sight will easily form on these or light-transmitting or reflective optical surfaces. Fog has brought a lot of inconvenience to people's daily life, sometimes even disastrous. For example, on the windows of driving cars, usually in the rainy season or winter with low temperature, surface fogging is unavoidable. The current general practice is to use the air conditioner to heat the surface of the window to increase the condensation point of water, so that the surface of the window is in a dry state, so as to prevent fogging and...

Claims

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Application Information

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IPC IPC(8): C09D133/02C09D7/12C09D5/00C08J7/04
Inventor 陈振昌蒋宇扬张红娟
Owner BEIJING RIBIO BIOTECH
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