| 摘要 |
PURPOSE: A coating composition is provided to ensure excellent applicability and filling property and to form a silica layer having excellent membrane properties. CONSTITUTION: A coating composition includes perhydropolysilazane and a solvent. The molecular weight slope of the perhydropolysilazane has respective maximum values in molecular weight of 800~2,500 and molecular weight of 3,000~8,000, wherein a ratio(Mw/Mn) of average molecular weight(Mw) and number average molecular weight(Mn) is 6~12. The content of the perhydropolysilazane is 10~25 wt% based on the total weight of the coating composition. |
