| In consideration of serious economic loss in shipping business caused by the sticking of halo bios every year and thinking of oceanic pollution caused by oceanic antifouling paint, there have been more and more researches and developments of marine organ tin-free antifouling paint at home and abroad, as well as its application. The research and development of low surface energy antifouling paints is one of the important objects.The modified acrylic resin has been synthesized by organic-silicon and organic-fluorine with the property of low surface energy and others acrylic monomer. Effects of monomer content, polymerization processes on resin property were discussed. The best resin is made of the organic-silicon content at 9.0%, organic-fluorine content at 7.3%, and the hard and soft monomer in the ratio of 1.2. Moreover, marine antifouling paint was prepared by fluorine-silicon modified acrylic resin as film-forming substance. And effects content of nano-SiO2 , micron dimension pigment, modified acrylic resin, ultrasonic dispersion time, and mass percent of carbon nano-tubes on antifouling coating property were discussed. The contact angle between paint surface and water, glycerin were measured and the surface energy was counted. As well as the conventional properties including adhesion, impact strength, hardness, etc. of paints were tested, the macro-observation and the analysis of SEM micro-morphology of paint film were analyze at the same time. The best formula and preparing process were ascertained. The result showed that the surface energy of the coating is 0.87mN/m, the contact angle between paint surface and water is 143.5°, the adhesion strength is Grade 2, the hardness is HB, and impact strength is much greater than 50 kg ? cm for the coatings which made of 55.87% resin and 9.3% nano-SiO2 which the ultrasonic dispersion time is 10 min. The SEM of coating prepared by the best formula was analyzed, so the hydrophobic structure was found to produce the ideal hydrophobic effect.
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