| abstract |
The invention discloses a polyacrylate/nanometer SiO2 hybrid emulsion with high coating film hardness and tolerance, a preparation method and an application thereof. The preparation method adopts the semi-continuous seed emulsion polymerization process, first prepares vinyl siloxane modified polyacrylate emulsion, and then blends with silica sol, co-solvent and other additives to prepare polyacrylate/polyacrylate with high silicon content Nano silica hybrid emulsion. Concentrating with the co-solvent during film formation will drive the siloxy groups on the organic polymer chain to undergo a sol-gel reaction with the silicon hydroxyl groups of the silica sol, and self-assemble on the surface of the coating to form a dense glass-like coating, improving the coating Hardness, chemical and heat resistance. The PAE/ SiO2 hybrid emulsion prepared by the invention has the characteristics of good storage stability, high coating film silicon content, high coating film hardness and excellent chemical resistance. |