Silicone polymers mainly include three types: silicone resin, silicone rubber, and silicone oil. The silicone polymers used for coatings are mainly silicone resins and modified silicone resins. Among them, silicone resins are highly branched. Structured polymethylsiloxane (PDMS), modified silicone resins include alkyd resins, epoxy resins, acrylic resins, polyurethane resins, fluorocarbon resins, etc. Davies et al. used amino- and methoxy-containing DDMS and hydroxyl-terminated PDMS to react under the action of a catalyst (dibutyltin dilaurate) to prepare an antifouling product with low surface energy, suitable elasticity and reduced adhesion strength coating. Wang Ke et al. added polydimethylsiloxane silicone oil when preparing low surface energy silicone antifouling coatings. Various tests on the coating film showed that the addition of an appropriate amount of silicone oil can further reduce the surface energy of the coating and increase the hydrophobicity. , which can significantly improve the antifouling effect of the coating film.

Silicone Modified Acrylic Resin
The adhesion of silicone resin to the substrate is poor, and the effect of using it as an antifouling material alone is poor, while the acrylic resin has good adhesion and moldability, and the price is reasonable. The composite use of acrylic resin and silicone resin can significantly improve Heat resistance, cold resistance, solvent resistance and stain resistance of the coating film. Guo Hong et al. prepared silicone-modified polyacrylic resin by chemical graft copolymerization. By adjusting the content of silicone resin, the optimal conversion rate of acrylic monomer was 25%. The obtained modified resin was used to prepare antifouling coating and carry out The actual sea performance test shows that the graft copolymer of silicone and acrylic resin has a good antifouling effect. Kawakami et al. prepared silicone copolymers with silicone/methyl methacrylate as raw materials, and studied the surface properties of the copolymers. The results show that the coatings prepared with silicone/acrylate have both advantages and have excellent properties. Water resistance, stain resistance and other characteristics. Yang Li et al. grafted hydroxy acrylic resin and polymethylsiloxane to obtain silicone-modified acrylic resin, and then prepared a self-polishing composite antifouling coating with low surface energy from it. The surface energy of the coating film was 23.63 mj, m2, with excellent antifouling effect. Qu Yuanyuan et al. modified acrylic resin with silicone resin, and then dispersed nano-Sio2 and other pigments and fillers in the modified resin to make antifouling coatings with low surface energy. %, the contact angle between the surface of the coating and the liquid is greater than 98°, and the antifouling effect is excellent.
Silicone modified fluorocarbon resin.

   Silicone is an elastomer and is prone to deformation. Therefore, the peeling of dirt on the coating surface is mainly due to physical action. The fluorocarbon resin is a rigid polymer. The surface energy of the fluorocarbon resin used in the coating is extremely low and the friction coefficient is very small. energy of. Although fluorocarbon resin has low surface energy and excellent weather resistance and stain resistance, it has poor impact resistance. When the coating is scratched by external force, it is easy to crack and fall off, losing its anti-fouling effect. The development of surface energy fluorocarbon antifouling coatings is limited. According to the "similar compatibility" principle of molecular structure, the fluororesin and the room temperature-curable silicone resin are directly mixed in a certain proportion by the physical blending method to obtain a low surface energy fluorosilicone resin blend. Zhang Zuwen et al. prepared a silicone-modified fluorocarbon low surface energy antifouling coating and carried out a real-sea antifouling performance test and contact angle measurement. The obtained coating has a large initial contact angle and a low surface energy, which can effectively prevent The initial adhesion of marine organisms, compared with the pure silicone resin antifouling coating, the antifouling effect of the silicone modified fluorocarbon resin coating is better. The research of Robert et al. shows that by adjusting the ratio of fluorine and silicone resin in the modified resin and the distribution and atomic arrangement of the two elements on the coating surface, an antifouling coating with good mechanical properties and good antifouling effect can be made. Harris et al. prepared a fluorosilicon low surface energy copolymer containing a symmetrical benzene ring in the structural unit by a chemical synthesis method, and the coating film had excellent water resistance and stain resistance. Zhou Xiaodong et al. used AIBN as an initiator to perform solution polymerization of fluorocarbon monomers and several acrylic monomers such as methyl methacrylate to obtain fluorocarbon resin copolymers, and then modified them with organosilanes to obtain low surface Silicone-modified fluorocarbon resin, which has excellent self-cleaning properties and anti-fouling properties. Sun Xiaoying et al. used dodecafluoroheptyl methacrylate (FMA), polydimethylsiloxane methacrylate (SMA) and several acrylic monomers to synthesize a side chain containing organic fluorine and organic fluorine through solution polymerization. Silicon-based acrylic resin, discussed the effect of FMA and SMA content on the properties of the resin coating film, the study showed that the fluorosilicon-modified acrylic resin has lower surface energy than the single fluorine-containing or silicon-containing modified acrylic resin, and the coating film has a lower surface energy. Better antifouling performance.
    On the whole, the antifouling coating based on fluorosilicone resin has better hydrophobicity and antifouling resistance than ordinary antifouling coatings. Therefore, this kind of polymer modified antifouling coating is an important direction for future development.