Paint film adhesive, preparation method thereof and paint film back-pasting treatment method
A technology for adhesives and paint films, applied in the direction of adhesive additives, adhesive types, pre-treated surfaces, etc., can solve problems such as poor aging resistance, and achieve the effect of harmonious appearance, good compatibility, and high bonding strength
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[0029] The second aspect of the present disclosure provides the preparation method of the adhesive described in the first aspect, wherein the method includes the following steps: mixing the japonica rice paste into the transparent lacquer and the raw lacquer, mixing once; then adding lead monoxide powder, Mix once; add Rocima342, mix three times; after 5-10 minutes, it becomes viscous and forms an adhesive.
[0030] The performance of the material is closely related to its microstructure. Using a scanning electron microscope to observe the surface microscopic features of the components in the adhesive, the results are as follows figure 1 : The granule size of japonica rice starch is uneven, and the granule shapes are mainly round, elliptical and irregular, and the elliptical granules have obvious depressions; the granules of japonica rice paste are small, relatively fine, the adhesive layer is thin, and the drying is slightly faster Some. There will be a lot of pores on the s...
Embodiment 1
[0046] Taking the self-made paint film simulation sample without paint gray layer as the implementation object, the self-made paint film is attached back to the surface of the pine block.
[0047] Preparation of simulated sample of paint film without paint gray layer: Pour an appropriate amount of red push-up paint solution onto a clean PTFE film in a fume hood, and repeatedly scrape it with a paint scraping board until the surface is completely flat and has no obvious defects or parts Inhomogeneous state; put the coated paint sheet into a saturated salt water humidity generator (dryer equipped with potassium chloride saturated salt water, T=25°C, RH=85%), take it out after drying for one week, and peel off to obtain a complete Paint film samples, thickness is about 0.1 ~ 0.2mm, cut into 2cm x 2cm paint flakes for pasting.
[0048] Repaste steps and effects: the composition of the adhesive (self-made adhesive I) includes: 65 parts by weight of transparent varnish, 30 parts by ...
Embodiment 2
[0050] Taking the remnants of paint film unearthed by archeology as the implementation object, paste the painted paint film with paint gray, the thickness is about 0.37-3mm.
[0051] The preparation process of adhesive (self-made adhesive II) comprises: the transparent lacquer of 50 parts by weight, the rice paste of 20 parts by weight, the raw lacquer of 17 parts by weight, the lead monoxide of 2.5 parts by weight, the Rocima342 of 0.5 parts by weight; The preparation method is: pour 8g of japonica rice flour and 24mL of distilled water into the metal cup of RVA Super4 rapid viscosity analyzer (Newport Scientific, Australia) and mix, and stir evenly. After stirring at 960r / min to form a uniform suspension, keep Stir at a speed of 160r / min for 13min; keep the viscosity analyzer at the initial temperature of 30°C for 1min, then raise the temperature to 95°C at 12°C / min, stir at 95°C for 5min, then lower it to 30°C at 12°C / min, keep warm 2 minutes, the preparation of the japonic...
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