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Asahi Glass Succeeded in Development of a Fluorescent Fluorinated Water/Oil-repellent Coating Material

Published on 2007-09-26. Author : SpecialChem

Asahi Glass Co., Ltd. has succeeded in development of a fluorescent fluorinated water/oil-repellent coating material. Since this material generates fluorescence when illuminated by a light, inspection of a coated product can be automated to contribute to drastic improvement in efficiency and accuracy of the inspection.

Since the conventional coating process to get the water/oil-repellent feature produces a very thin transparent film when the material is applied, it is not possible to visually inspect the product, making automation of the inspection difficult. When illuminated with light of 360 nm to 430 nm (nm = nanometer. nano = one-billionth) wavelength on a product, this new coating material developed this time emits a turquoise colored light. This characteristic makes it easy to find any defect in the application so that efficiency and accuracy of the inspection can be much improved. Special features of this product are as follows.

  1. Durability of fluorescence: Both mechanical durability (the color is not easily transferred when the applied part is touched by the customer) and thermal durability (the pigment does not fly off even when heated) are high.

  2. The contact angles that represent its performance in terms of water/oil repellent are as great as 115° for water (deionized water) and 75° for oil (Lubricating oil). (These figures were measured one hour after application to a stainless steel base material, treated at 120 degrees Celsius.)

  3. Can be applied to a wide range of base materials, such as silicon wafers, stainless steel, brass, liquid crystal polymers, etc. Both spin method and dipping method can be used for application.

  4. Does not contain environmentally antagonistic materials, such as perfluorooctanoic acid (PFOA) or perfluorooctane sulfonic acid (PFOS), and its global warming potential (GWP) is as low as approximately 130.

In the medium-term management plan "JIKKO-2007", the Company positioned both fluorochemicals and specialty chemicals businesses as a growth business of Chemicals Company and declared to focus on product group in which the Company can exhibit advantages. The Company will endeavor to develop products that can contribute to global environmental protection and to improvement in production processes for customers, making the most of technology owned by the Company.

Source: Asahi Glass Co., Ltd.

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