Coating with water-repellent and easy-to-clean properties and method of forming a coating using the same
A technology of characteristics and coatings, applied in coatings, special surfaces, devices for coating liquids on surfaces, etc., can solve the problems of poor film-forming properties, poor durability, small molecular weight, etc., to improve the ability of water repellency and easy cleaning, Durable effect
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Problems solved by technology
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Examples
experiment example 1～4
[0037] Material Description
[0038] 1. PVA1: 10% by weight fully hydrolyzed resin with a degree of polymerization of 1700.
[0039] 2. PVA2: 20% by weight fully hydrolyzed resin with a polymerization degree of 300.
[0040] 3. PVA3: 10% by weight of partially hydrolyzed resin, with a degree of polymerization of 500.
[0041] 4. Acrylic emulsion: the one selected in Table 1 is a styrene-acrylic copolymer resin emulsion with a solid content of 47±1%.
[0042] 5. Water-based PU resin: water-based PU resin with a solid content of 35±1%.
[0043] 6. Hydrogen-containing silicone resin: silicone resin emulsion with 50% active ingredient.
[0044] 7. Fluororesin: It is a C6 fluorocarbon copolymer with a solid content of 20±1%.
Embodiment approach
[0046] The compositions in Experimental Examples 1-4 and Comparative Examples 1-4 were coated on 50mm×150mm plain glass with a #14 wire bar by the wire bar coating method, and then heated in a hot air drying oven at 150°C for 5 minutes. Dry under the same conditions, which is the test piece.
[0047] Evaluation method
[0048] A. Water drop angle: Use a water drop contact angle measuring instrument to measure the water drop angle of the sample coating film.
[0049] B. Water resistance: Wipe the surface of the coating film with a damp cloth to observe whether there are defects on the surface of the coating film, such as sticky surface, loss of gloss on the surface, lack of material on the surface, etc. The qualified product should be the same as before the test.
[0050] C. Ease of wiping: Use an oil-based pen to scratch the surface of the sample, and then wipe the surface with 70% alcohol after drying. The qualified product must not leave oil-based ink marks on the surface. ...
experiment example 5～7
[0055] Implementation
[0056] Coat the composition of Experimental Example 1 with a #14 wire bar on a 130mm x 160mm wallpaper by the wire bar coating method, and then dry it in a hot air drying oven at 150°C x 5 minutes to complete the applied layer Count one layer (i.e. Experimental Example 5). Afterwards, the second layer (ie Experimental Example 6) and the third layer (ie Experimental Example 7) can be repeatedly produced according to the required number of layers.
[0057] Evaluation method
[0058] Use an oil-based pen to graffiti on the wallpaper sample, spray it with 70% alcohol after drying, use toilet paper to wipe off the oil-based pen marks, observe the oil-based pen ink leakage (ie leakage) and the degree of oil-based ink traces ( Ease of cleaning) to be evaluated.
[0059] Table 2
[0060]
[0061] From Table 2 above, it can be seen that the leakage and easy-to-clean performance of layers with more applied layers (such as Experimental Example 7) are better...
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Abstract
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