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The glass surface is a hydrophilic surface, high surface energy upon contact with water, its surface can be significantly reduced, and can be water wet. If the glass is very flat and very clean, the water droplets in the glass will be free to expand, the contact angle is zero. If the glass plate is tilted, water down the river, and adhesion. In practice, however, due to the glass surface is often not completely flat, and there is often dust and other contaminants. In this state, its surface is not smooth, and the unevenness of the solid surface, the water droplets on the glass plate in such an inclined advancing angle and backward angle ranging from adhesion phenomenon occurs. This phenomenon can be seen in the glass windows or plastic raincoat raindrops sprinkle. Existing car are scraping the wipers (is) to erase the drops of water or keeping cold air to get rid of dew, but the former stop on the windshield the reciprocating Games interfere with the driver line of sight, affect driving safety, and the glass is still water film, During heavy rains, rainstorm, scraping wipers (is) even powerless, poses a serious threat to the automobile driving (driving); the latter wasted more energy. China is a car big and populous country, the development of the glass surface hydrophobic membrane and its application products, will bring enormous social and economic benefits. This article (1) by a chemical blend modified method, the introduction of silicone on the side chain polyacrylate, using the trend of silicone migrated to the surface, to reduce the surface free energy of the coating, to improve its hydrophobicity; (2) modified by copolymerization, the silicone segment is introduced in the main chain of the polyacrylate to improve the comprehensive performance of the coating, and to explore the feasibility of the silicon - acrylic-modified hydrophobic membranes. By Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (~ 1H-NMR), gel permeation chromatography (GPC) methods, characterization of the structure and molecular weight of the synthesized product; by thermal gravimetric analysis (TGA) test modified coating thermal stability; determination of the the modified coating the surface of the contact angle spectrophotometer test translucent coating; contact angle measurements; according to the national standard GB1725-79, GB1733-79 test coating solids and water resistance ; tested by simulating rain experiment, the effect of the actual coating application. Made a more systematic study through the characterization of silicon-acrylic modified coating performance factors and the impact of surface hydrophobicity. By solution polymerization, and the four monomers methyl methacrylate (MMA), acrylic acid the Butyl (BA),
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