For systems requiring wear resistance, in addition to improving the cross-linking density from the perspective of resin, adding additives is also a common means, using silicone additives is a common method. Ultrahigh relative molecular weight organosilicon microspheres, ultrahigh relative molecular weight organosilicon emulsions and organosilicon nano modifiers are common.
Ultrahigh molecular weight wear-resisting organic silicon microball has a slight crosslinked structure inside the dispersion of high molecular weight polysiloxane, microspherically, after adding to the system, eventually will be arranged on the surface of the paint film, forming a layer of polysiloxane film, so as to provide excellent slip and surface wear-resisting effect for the system. In water-based coating system, in addition to organic silica microspheres, ultrahigh relative molecular mass of organic silicone emulsion is commonly used wear-resisting agent, they are usually made of organic silicone emulsion polymerization and, in the phase viscosity is extremely high, relative molecular mass can reach millions, add to the system after the film, can form a layer on the surface of the ultra high molecular weight of organic silicon thin layer, Thus, the wear-resisting effect of the film is improved. Recently, people developed a kind of special structure of organic silicon wear-resisting agent, its chemical composition is half as many as cage poly siloxane, structure as shown in type (4), it is a low poly cage organic silicon compounds, among them, the R group can be all kinds of reactive groups, such as hydroxyl group, epoxy group, acrylic double bond, etc., add it to system, The reactive group can participate in the resin curing reaction, thus introducing a structure similar to inorganic siloxane into the system, which can simultaneously improve the flexibility and wear resistance of the system.