Study On Silca Sol Coupling With Styrene-acrylic Emulsion Composite Paint

Most of the building's exterior wall in the developed countries are decorated and protected by paint, and the protection of the external walls of buildings in China are mainly decorative tiles. This situation formed a very important factor is the existence of exterior house paint with poor weathering , low anti-contamination,short life, and so on. So to develope a new type of exterior house paint overcome these shortcomings with broad prospects. This paper is using the modified coupling agent was prepared by a coupling of inorganic silica sol organic compound modified emulsion styrene-acrylic, and used in the exterior wall paint, creating a new formula .Papers systematically studied: Silica Sol, styrene-acrylic emulsion, coupling agent, PH value system factors of the composite emulsion, and so the impact on its performance to determine the optimal formula paint on the external walls and external walls and other coatings were compared.The results showed that:1, When the silica sol and styrene-acrylic emulsion ratio of 3:7, the system PH value of 9-10 at the compound emulsion has good overall performance; modified by coupling the silica sol inorganic particles can be better Scattered in emulsion system; when the accession of about 0.125 percent, detected a small amount of a new bond.When coupling amount is 0.25 percent, emulsion of the bond system basically complete, the coupling agent to increase the amount, the composite emulsion system is hardly to generate new keys;at last we form No rules network structure model of silica sol and styrene-acrylic emulsion.2, Latex content, auxiliary system on the external walls of the paint stains and anti-aging properties have significant impact, The aging of life pales by 5 percent rate projected to reach 22.6 years, of the anti-contamination can be achieved 95.8 percent, Performance coatings are better than ordinary paints, and lower prices; last test in accordance with national standards of architectural coatings of paint on a test. The results showed that: water-resistant coating, the ageing resistance, stain-resistant, resistant to scrubbing of the properties are more than the corresponding national standards.