For a long time, the application of silicone resin in the field of powder coatings has been restricted by limited raw material selection, high cost, compatibility with other ingredients and curing problems. However, with the continuous advancement of industry technology and the active promotion of many companies, the unique advantages of silicone resin are gradually becoming prominent. These advantages include its excellent weather resistance, durability, heat resistance, as well as excellent electrical insulation properties, high hardness and low surface tension. Therefore, the application prospects of silicone resin are ushering in significant changes, and it is expected that silicone-based powder coatings will occupy an important technical position in this industry in the future.
Organic silicone resin, as a polysiloxane resin polymer with a silicon-oxygen main bond (-Si-O-Si-) and an organic side chain, has many excellent properties due to its unique molecular structure. The silicon-oxygen main chain gives the polymer properties close to inorganic substances, such as safety, reliability, non-toxicity, pollution-free, heat stability, aging resistance and long service life. The organic groups in the side chains make the polymer have the flexibility and easy processing of polymer materials. This special molecular structure makes organic silicone resin significantly different from conventional carbon-based polymer materials in terms of performance.
Prospects for the application of silicone resin in the field of powder coatings
Silicone resin, a unique material that combines the advantages of organic and inorganic substances, has gradually attracted attention in the field of powder coatings in recent years. Its excellent weather resistance, self-cleaning properties, insulation, high hardness and transparency make silicone resin an ideal choice for high-end applications such as power batteries and energy storage batteries. Although the application of silicone resin still faces technical challenges and cost pressures, with the continuous deepening of research in this field by universities and enterprises, the expansion of market selection, and the increase in demand for high-performance coatings in downstream applications of powder coatings, the application prospects of silicone resin are becoming increasingly clear. It can be foreseen that silicone resin will play a more important role in the field of powder coatings in the future.
Application of high-temperature resistant powder
Silicone resin has become an ideal choice for high-temperature resistant powder coatings due to its excellent thermal oxidation stability and high-temperature resistance, under the action of multiple unique chemical mechanisms. Its Si-O-Si bond energy is as high as 445KJ/mol, far exceeding carbon-based polymers, making the bond difficult to break in high-temperature environments. In addition, the Si-O-Si main chain has excellent shielding function, which can effectively resist the oxidation of organic groups by oxygen, thereby enhancing the stability of Si-R (organic group). Compared with conventional powder coating resins, silicone resin has a higher thermal degradation starting temperature and a slower decomposition rate, ensuring that the coating produced by it can continue to play a protective role in high temperature environments. When silicone resin decomposes, its remaining part still maintains a structurally stable Si-O-Si structure, which can further serve as a protective layer for the coating. These characteristics make silicone resin perform well in coating applications such as exhaust pipes, barbecue grills, ovens, and various parts that require high temperature resistance.
Insulating powder application
While conventional epoxy insulating powder can meet basic insulation needs, silicone resin has shown more outstanding characteristics in the insulation field. Silicone resin has the following three unique properties:
First, most silicone resins do not contain polar groups, which makes their relative dielectric constant and dielectric loss tangent values fluctuate very little when the operating temperature changes.
Second, silicone resin has a low thermal deformation coefficient, which means that the size of the material changes very little with changes in temperature.
Finally, the surface group characteristics of silicone resin give it excellent waterproof and water repellency.
These three points together enable silicone resin to maintain stable insulation performance in high temperature and high humidity environments. In particular, it can still maintain excellent insulation performance after continuous heat resistance, which makes silicone resin show significant performance advantages in power batteries that are charged and discharged quickly for a long time and in motor and electronic control components that work in high temperature environments for a long time.