Preparation and Properties of Carboxylate CDA Waterborne Polymer/SiO2 Nano-Composite Emulsion
WCCDA/SiO2 nano-composite emulsion was prepared by using DMBA as a hydrophilic agent,Nano-SiO2 was introduced into the system to improve the comprehensive performance of emulsion coating,and the interaction mechanism of nano-SiO2 was studied.The results showed that the optimal process of WCCDA/SiO2 nano-composite emulsion was as follows:mass fraction 1.00%of nano-SiO2(8 nm),mass fraction 27.0%of CDA.The coating surface was compact and smooth,and the flexibility,adhesion,water resistance,yellowing degeneration resistance,mechanical properties and thermal stability were excellent.When WSCDA/SiO2 nano-composite emulsion film was formed,many small'mastoids'were formed on the surface of the coating film,resulting in lotus leaf effect,improving the water resistance,medium resistance and yellowing resistance of the coating film.
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