Water-based antiseptic paint for automotive chassis and preparation method thereof
A technology of automobile chassis and anti-corrosion paint, which is applied in the field of paint to achieve the ideal effect of protecting the environment, strong adhesion, and salt spray resistance
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Embodiment 1
[0033] 1. Example 1 Synthesis of LH-302 resin
[0034] Main raw materials
[0035] 1.1 Material composition
[0036] Epoxy resin E-42, fatty acid, high molecular weight regulator, silicone intermediate, methyl methacrylate (MMA), butyl acrylate (BA), methoxy polyvinyl alcohol methacrylate (MAA) acrylic hydroxy Ethyl acetate (HEA), surfactants, initiators, and mixed non-toxic solvents are all industrial products.
[0037] 1.2 The weight of each component used in resin preparation (kg)
[0038]
[0039] Wherein, the mixed solvent is a mixture of xylene, ethylene glycol ethyl ether acetate, and sec-butyl ester in a volume ratio of 3:1:1;
[0040] 1.3 Synthesis process
[0041] (1) Put the weighed fatty acid into the reactor, add epoxy resin, molecular weight regulator and part of the solvent, and carry out the esterification reaction at 150-160℃. When the acid value drops to 40mgKOH / g, it is regarded as esterification. At the end, the reaction system is cooled to room temperature;
[0042] ...
Embodiment 2
[0045] Example 2. Preparation of finished water-based paint
[0046] 2.1 Material composition of main raw materials
[0047] LH-302 resin (homemade), carbon black (6#), iron black, modified aluminum tripolyphosphate, organic nitrogen zinc salt, ultrafine pigments and fillers, modified fillers, various additives and deionized water are all industrial Product.
[0048] 2.2 The weight of each component of water-based automobile chassis anticorrosive paint (kg)
[0049]
[0050]
[0051] 2.3 Finished paint production process
[0052] (1) Mix the deionized water, wetting and dispersing agent, defoamer, leveling agent, and evenly, and then add part of the resin liquid to adjust the PH value to 8.5-9.0;
[0053] (2) Under stirring, add pigments and fillers, disperse at high speed for 1-1.5h, filter with 80 mesh sieve, the filtered material enters the sand mill to circulate and grind to the fineness ≤25u, discharge, the outlet material temperature ≤60℃ ;
[0054] (3) The materials with qualifie...
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