Anti-fog coating composition, anti-fog thin film and product

An anti-fog coating and composition technology, applied in the field of medical surgical masks, can solve problems such as loss of anti-fog performance and product failure

Inactive Publication Date: 2010-06-23
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, such anti-fog products require a certain shelf life. If there is a lot of moisture or high temperature during storage or transportation, the product is likely to fail. For example, at 50 degrees Celsius and 90% relative humidity, it usually takes less than 12 hours. Loss of anti-fog properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] (1) Preparation of polyvinyl alcohol solution: add the required amount of polyvinyl alcohol to deionized water at 70 to 80 degrees Celsius under stirring conditions, and keep stirring until the polyvinyl alcohol dissolves.

[0051] (2) Preparation of coating composition: add anionic surfactant and optional various additives in the required amount of polyvinyl alcohol solution, such as SiO 2 Nanoscale solution, etc., keep stirring for at least 30 minutes to obtain the anti-fog coating composition of the present invention.

[0052] The anti-fog coating composition of the present invention adopts conventional coating method, such as wire rod coating, roll coating, curtain coating, web roll coating, spray coating, dip coating, air knife coating etc., be coated on substrate On at least a part of at least one surface of the material, the film of the present invention can be obtained. Preferred coating methods include wire bar coating, screen roll coating, or air knife coatin...

specific Embodiment

[0063] The raw material adopted in the following examples and comparative examples, its purposes and sources are listed as follows:

[0064] Octylphenol ethoxylate (Triton X-100, Dow China Co., Ltd., Shanghai, China)

[0065] The complex of alkyl dimethyl benzyl ammonium chloride (Bardac 208, Lonza company, Switzerland)

[0066] 10% D-glucopyranose, oligomer, decyloctylglucose (BG-10, Dow China, Shanghai, China)

[0067] Hydrogenated castor oil (PEG-40, Shanghai Xietai Chemical Co., Ltd., Shanghai, China)

[0068] Aliphatic polyoxyethylene ether (AEO-7, Dow China, Shanghai, China)

[0069] Sodium N-oleoyl polypeptide (Ramibang A, Shanghai Weijie Daily Chemical Co., Ltd., Shanghai, China)

[0070] Dodecylbenzenesulfonic acid (Jingdi Chemical, Shanghai, China)

[0071] Sodium dodecylbenzenesulfonate (Milan Chemical, Nanjing, China)

[0072] Sodium dodecyl sulfonate (Shanghai Shengzhong Fine Chemical Co., Ltd., Shanghai, China)

[0073] Sodium secondary alkyl sulfonate (SAS60...

Embodiment 1

[0084] Example 1 (anionic surfactant): 250 mg of 10% dodecylbenzenesulfonic acid aqueous solution was added to 10 g of 7% polyvinyl alcohol aqueous solution (GM-14), and stirred for 30 minutes. The resulting solution was coated on the PET surface with a 4 μm wire bar, and then placed in an oven at 120 °C for one minute. The finally obtained PET film has an aging anti-fog performance of 6 under the environment of 50 degrees Celsius and 90% relative humidity.

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Abstract

The invention provides an anti-fog coating composition which comprises at least one hydrophilic polymer; at least one anionic surfactant which accounts for 0.5% by weight-25% by weight calculated by taking the weight of the polymer as 100% by weight; inorganic oxide particles which account for 0% by weight-60% by weight calculated by taking the weight of the polymer as 100% by weight; and a solvent, wherein the polymer is at least one selected from cellulose, polyvinylpyrrolidone, polyacrylic acid, polypropylene amide and polyvinyl alcohol. The invention further provides an anti-fog thin film, which comprises a substrate and a coating which is positioned on one part of the surface of at least one surface of the substrate and produced by the composition. The invention also provides a product comprising the anti-fog thin film, such as masks and glasses for medical operations, mine masks, food packaging boxes, food packaging bags and the like.

Description

Technical field: [0001] The invention relates to an anti-fog coating composition, an anti-fog film and products, in particular to an anti-fog coating composition which is especially suitable for high-temperature and high-humidity environments, and an anti-fog coating comprising the coating made of the composition. Fog films and articles comprising the anti-fog films, such as medical surgical masks. Background technique [0002] Plastic or inorganic transparent materials are often used in our daily life. A common problem of these materials is that their transparency will be greatly affected after fogging. For example, during the operation, if the fogging phenomenon on the surgical mask used by the doctor is serious, it will cause immeasurable consequences to the operation. In order to solve this problem, various anti-fog coatings have emerged. [0003] The anti-fog property of the coating will decrease with the rise of temperature and humidity, especially the humidity has a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D101/02C09D139/06C09D133/02C09D133/26C09D129/04C09D5/00C09K3/18B32B33/00A41D13/11A61F9/06G02B1/10
CPCC09K3/18
Inventor 奚邦为景乃勇解荡乌云高娃喻志刚
Owner 3M INNOVATIVE PROPERTIES CO
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