Alkoxysilanes copolymerization

Two other classes of silicones deserve mention. These are the water-based silicones that are used in sealant and coating applications and the silicone pressure-sensitive adhesives. Water-based silicones can be prepared by anionic polymerization of siloxanes in water using a surface-active catalyst such as dodecylbenzenesulfonic acid [4]. The resulting emulsion can then be cross-linked in several ways, including the use of alkoxysilane copolymerization or tin catalysts in conjunction with colloidal silica. The result is essentially an emulsion of cured PDMS in water. Various fillers and other components are added, resulting in a sealant composition. Upon evaporation of water. 

A colored polymer/aluminum hybrid pigment was synthesized by NMP initiated from the surface of aluminum flakes [60]. The latter were coated with a thin silica layer. In this case, the chemical grafting of the initiator was performed through silylation reactions. The initiator used was an SGl-based alkoxyamine functionalized with an alkoxysilane moiety. This compound was previously prepared from the intermolecular radical 1,2-addition of Blocbuilder MA in the presence of 3-(trimethoxysilyl)propyl acrylate. Styrene or n-butyl acrylate were then copolymerized with vinyl dye monomer in a controlled manner. 

---