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Fluorine-containing coating agent and articles treated with the coating agent
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A technology for coating agents and articles, applied in the direction of coating, etc., which can solve problems such as inability to obtain performance, nozzle clogging, and storage stability problems.
Active Publication Date: 2019-10-15
SHIN ETSU CHEM IND CO LTD
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Moisture in the solvent reacts with the hydrolyzable silyl group, causing double polymerization to multipolymerization between polymers, sometimes causing gelation and polymerprecipitation, causing problems in storage stability
[0007] In addition, even if gelation and polymer precipitation do not occur, if the molecular weight of the polymer increases, nozzle clogging may occur in jet coating, ink jet coating, and dip coating The film thickness is prone to unevenness, and a uniform film cannot be formed, and sufficient performance cannot be obtained, and the transparency and optical properties are impaired
Method used
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[0292] Examples, reference examples, and comparative examples are shown below to describe the present invention in more detail, but the present invention is not limited by the following examples.
[0293] The following compounds 1 to 4 were prepared as hydrolyzable group-containing silanes modified with fluoropolyether group-containing polymers.
[0344] [Examples 7-12, Reference Example 2, Comparative Examples 4-6]
[0345] Formation of cured film and evaluation of transparency and abrasion resistance
[0346] On glass (Gorilla II manufactured by Corning Co., Ltd.), use a spray coating device (NST-51; manufactured by Ti-And Kei Co., Ltd.) to apply the treatment agents A to J prepared above as coating agents, and set the temperature in an atmosphere of 80°C and 80% humidity. It was cured for 1 hour to form a cured film (film thickness: about 15 nm), and a test body was prepared.
[0347] The haze (transparency) measurement and abrasion resistance test of this test body were performed under the conditions shown below. The results are shown in Table 4.
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Abstract
The invention provides a fluorinated coating composition which can stably form a uniform coating film on a substrate and the storage stability is improved when a former solution is used, and an article treated with said coating composition. The fluorinated coating composition is characterized in that in the coating composition containing the following components (A) -(C), the content of the (A) component is 0.01-50 mass% relative to the whole coating composition, and the content of the (C) component is 0.01-5mass% relative to the whole coating composition. The (A) component is a silane containing a hydrolysis group and / or a partial hydrolysis condensation compound, and the silane is modified by a polymer containing a fluoropolyether group. The (B) component is the solvent which can uniformly dissolve the (A) component, and the (C) component is a silanization compound with molecular weight less than 250 and the hydrolysis group.
Description
technical field [0001] The present invention relates to a coating agent containing a hydrolyzable group-containing silane modified with a polymer containing a fluoropolyether group and / or a partially hydrolyzed condensate thereof, and specifically relates to storage stability in a solution state before use It can stably form a uniform coating film on the substrate, form a coating film with excellent water and oil repellency, and low dynamic friction while improving and / or a fluorine-containing coating agent of a partially hydrolyzed condensate thereof, and articles treated with the coating agent. Background technique [0002] In recent years, touch panelization of screens has been accelerated, including displays for mobile phones. However, the screen of the touch panel is often exposed, and there are many opportunities for direct contact with fingers, cheeks, etc., and dirt such as sebum is easy to adhere to, which has become a problem. Therefore, in order to improve the a...
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