Synthesis, Structure And Property Of Composited Emulsion Of Inorganic Nano-Particle/Styrene-Acrylic

Emulsion of St/BA is a basic polymer which is widely used because of its superior properties (ray-resistance, climate-resistant, alkali-resistant, form film easily). But it has the common disadvantages as organic emulsion: low rigidity of the film, not good of scrubbing- resistant, not good of water-resistant, and the combine with the alkali materials (for example cement) is not perfect. Further more the price of it is high. However, inorganic materials have the advantages of no poison, less odor, good durability. It is easy to combine with the alkali materials. And it can improve the properties of the emulsion: rigidity, heat-resistant, solvent-resistant, scrubbing- resistant. And the price of it is low. So if combine with them, we can synthesize the emulsion with the merits of the two constitutes and it can be widely used in more new materials.We applied the mechanism of inarch(using silane coupling agent). The surface of inorganic particle was modified by silane coupling agent (triethoxyvinylsilance) .The alkoxyl group form -Si(OH)₅ after its hydrolysis. This group can combine the surface of silicon dioxide, metal and its oxide with physical manners or chemical bonds. And the function group (carbon-carbon double bond) can formation chemical bond with the organic emulsion. So the two phase can be combined with chemical bond within nano scale.It was often reported that applied the nano-SiO₂ as the inorganic particle in reference paper. This paper applied the nano-TiO₂ because of its superior property of screen from ultraviolet radiation. It will improve coatings property of climate-resistant and extend the using period.We applied another kind of inorganic material (silicon sol) to synthesize the composite emulsion. In this paper silicon sol was prepared by traditional ion exchanging...