Method for rapidly detecting film coating stain resistance of emulsion paint

Abstract

The invention belongs to the field of detecting quality of an emulsion paint, and in particular relates to a method for rapidly detecting film coating stain resistance of an emulsion paint The method comprises the following steps of: detecting original reflectivity coefficients of a maintained coating test panel on at least three positions, and taking an average value A; completely immersing the test panel in fine linseed oil for 1min, and taking out; scratching and removing residual fine linseed oil on the surface of a paint film; scattering fly ash on the surface of a coating until the coating is completely covered; drying for 12h at temperature of 21-25 DEG C and under a relative humidity of 45-55%, and testing; adding 15L of water into the water tank of a flushing device; opening a valve to a maximum flushing sample; continuously moving the sample, so that various parts of the sample can pass through the water flow point; flushing for 1min; closing the valve, drying the sample for 30min at 48-52 DEG C; testing reflectivity coefficients of the coating sample on at least three positions, and taking an average value B; and calculating the reflectivity reduction rate of the stain resistance of the coating. The new emulsion paint film coating stain resistance detecting method disclosed by the invention can greatly shorten the detecting cycle and guarantee a stable detection result.

Description

Technical field [0001] The present invention is the field of latex paint quality testing, which involves a method of rapid detection of latex paint coating film. Background technique [0002] The existing latex paint coating resistance experimental method is based on GB / T 9755-2001 "Synthetic resin emulsion outer wall paint" Appendix A; its specific implementation steps are: [0003] 1. Principles: [0004] This method uses flour ash as the pollution medium, and paint it with water on the coating model; rinse it with water after drying.The resistance of the layer; [0005] 2. Main materials, instruments and devices: [0006] Flve ash and reflectors comply with GB / T 9270-1988. 4.3 regulations, balance of balance of 0.1g, soft brush width (25 ~ 50) mm.; [0007] 3. The traditional method is adopted by the rinse device: [0008] Water tank, water pipe and sample rack are made of anti -rust -proof hard materials; [0009] 4. Test: [0010] (1). Preparation of flour and coal ash water...

AI Technical Summary

Problems solved by technology

[0016] Remarks: The film-making method of the latex paint to be tested is to scrape once with a 120μm wire rod, dry it for 6 hours, and then scrape it again with an 80μm wire rod. The above test can only be carried out after curing for 7 days under the condition of 55)%; the disadvantage of this method is that the detection cycle is too long

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