Waterborne silicone resin is mainly a silicone resin emulsion with water as the dispersing medium, and the current application focuses on silicone-modified coatings, such as silicone-modified acrylic emulsions, silicone-modified polyurethane emulsions, silicone-modified polyester emulsions and so on. The introduction of silicone in traditional polymer emulsions can enhance their aging resistance resistance, waterproofing, high and low temperature resistance, hardening and other properties. By introducing silicone links into the molecular chain of the polymer during emulsion polymerization, the commonly used silicone precursors are silane coupling agents, such as silane coupling agents 171, 560, 570, etc.. These silane coupling agent are trifunctional alkoxy structure, in the aqueous system alkoxy hydrolysis into hydroxyl, hydroxyl further dehydration condensation, the formation of crosslinked structure, when the degree of crosslinking is too large, it will affect the stability of the emulsion, resulting in gelation, can not be used, so for the dosage of the silane coupling agent is a certain limitation, the general dosage of 1 ~ 10%, the dosage is too small to modify the effect is not obvious, too large an impact on the stability of the emulsion, the amount of dosage is too large, the stability of the emulsion. Emulsion stability, the dosage limit determines the effect of silane modification is limited, or even not obvious. Furthermore, the hydrolysis reaction of silane coupling agent occurs in the aqueous phase, the by-production of methanol, ethanol and other low molecular alcohols, which are flammable and toxic components, for water-based coatings, it is VOC, and VOC is a strictly controlled indicator of water-based coatings, so silane coupling agent modified water-based coatings can not be a fundamental solution to the problem of low VOC and zero VOC, which will ultimately lead to the limitation of the application.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.