采用两种有机硅树脂复配,通过实验确定采用硅烷偶联剂KH560对填料表面改性,乙酰丙酮铝是较合适的催化剂,添加聚硅氧烷提高其耐冷热冲击性能,使产品的各项性能达到包封料的测试要求。添加氢氧化铝作为无卤阻燃剂,达到UL-94V-0级要求,确定最佳挤出工艺条件,制得性能良好的有机硅无卤粉末包封料。 Two kinds of silicone resin compounding were adopted. The surface of filler was modified by silane coupling agent KH560, aluminum acetylacetonate was more suitable catalyst, polysiloxane was added to improve its thermal shock resistance, The performance of the encapsulation material to meet the test requirements. Add aluminum hydroxide as a halogen-free flame retardant, UL-94V-0 level to meet the requirements to determine the best extrusion process conditions, to obtain good performance silicone halogen-free powder encapsulation material.