Organic silicon compounds have many unique and excellent physical and chemical properties, which have long attracted widespread attention. The research on polysilazanes with Si-N bond structure has also made significant progress in recent decades. Although the research hotspots of polysilazanes are only in ceramic synthesis, high-temperature resistant silicone rubber and composite materials, its potential application in coatings has gradually become popular. Polysilazane contains silicon-nitrogen bonds and nitrogen-hydrogen chains. These chemical bonds give it many specific properties. Although people are not very clear about their mechanism of action, these properties play a very important role in coatings. The following is an introduction to the preparation of polysilazanes and their application in coatings.


1 Preparation of polysilazanes


Compounds containing Si-N bond structures mainly include silazane small molecules and polysilazanes, among which silazane small molecules are divided into linear silazanes [RnSi (NR2) 4-n] and cyclic silazanes [(R2SiN) n];