Finish paint composite and preparation method and use method thereof
A composition and topcoat technology, applied in the direction of pretreatment surface, device for coating liquid on surface, polyurea/polyurethane coating, etc., can solve the problem of insufficient paint film adhesion, high photoinitiator content, and fast photocuring speed and other problems, to achieve the effect of reducing internal stress residue, short curing time and good mechanical properties
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[0049] The present invention also provides a preparation method of the above-mentioned topcoat composition, comprising:
[0050] a), adding pigments and fillers and the water-based hydroxyacrylic resin with the structure shown in (I) to the auxiliary agent in turn, stirring for the first time, grinding after stirring, to obtain the first top coat;
[0051] b), adding water-based polyurethane acrylic resin, cross-linking agent, deionized water and photoinitiator to the first topcoat with the structure shown in (II) or (III) and stirring for the second time, filtering after stirring, get topcoat;
[0052]
[0053] R in formula (Ⅰ) 0 is a tertiary amino group, R in formula (II) and formula (III) 1 is a tertiary amino group, R 2 is a hydroxyacrylate group, R 3 is a diisocyanate group, R 4 is a polymer diol group, 20≤n≤60. The process of stirring the additives, pigments and water-based hydroxyacrylic resin can be a method well known to those skilled in the art, such as sti...
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