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<p>To improve the fire resistance performance of silicone resin, a silicone coating which can resist a flame temperature at 1200°C was designed and prepared by compounding glass powder, Mg(OH)<sub>2</sub>, talcum powder, kaoline, Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, and SiO<sub>2</sub> as functional fillers. After burning and oxidizing by acetylene flame at 1200°C for 90 min, there is no penetration and peeling of silicone coating. Moreover, the highest temperature on the back of the substrate is 263°C and the average temperature of it is 207°C, which are both lower than the softening temperature of steel. As analyzed, the functional fillers in silicone coating are evenly distributed. There are still high-temperature-resistant fillers including talcum powder, kaoline, SiO<sub>2</sub>, TiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> in the char layer formed by the fire-resistant coating. After fire resistance test, the char layer of silicone coating does not possess a large area of voids, which indicates that the composite glass powder may melt and flow in time in the range of 400–500°C. The glass powder with low-melting point supplements the vacancies caused by pyrolysis of organic silicone resin film former. Furthermore, the existence of glass powder and Mg(OH)<sub>2</sub> composite improves the high-temperature adhesion of silicone coating, while talcum powder, kaoline, SiO<sub>2</sub>, TiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> in the silicone coating have the function of reinforcement. The high-temperature resistance of talcum powder, kaoline, SiO<sub>2</sub>, TiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> improves the fire resistance of the silicone coating as well.</p>

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Study on preparation and fire-resistant property of an organic silicone coating with compounding glass powder

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • Jiaqing Zhang,
  • Yi Guo,
  • Lingxin He,
  • Jie Huang,
  • YuBiao Huang,
  • Fengju Shang,
  • Rui Liu,
  • Xia Zhou

摘要

To improve the fire resistance performance of silicone resin, a silicone coating which can resist a flame temperature at 1200°C was designed and prepared by compounding glass powder, Mg(OH)2, talcum powder, kaoline, Al2O3, TiO2, and SiO2 as functional fillers. After burning and oxidizing by acetylene flame at 1200°C for 90 min, there is no penetration and peeling of silicone coating. Moreover, the highest temperature on the back of the substrate is 263°C and the average temperature of it is 207°C, which are both lower than the softening temperature of steel. As analyzed, the functional fillers in silicone coating are evenly distributed. There are still high-temperature-resistant fillers including talcum powder, kaoline, SiO2, TiO2, and Al2O3 in the char layer formed by the fire-resistant coating. After fire resistance test, the char layer of silicone coating does not possess a large area of voids, which indicates that the composite glass powder may melt and flow in time in the range of 400–500°C. The glass powder with low-melting point supplements the vacancies caused by pyrolysis of organic silicone resin film former. Furthermore, the existence of glass powder and Mg(OH)2 composite improves the high-temperature adhesion of silicone coating, while talcum powder, kaoline, SiO2, TiO2, and Al2O3 in the silicone coating have the function of reinforcement. The high-temperature resistance of talcum powder, kaoline, SiO2, TiO2, and Al2O3 improves the fire resistance of the silicone coating as well.