聚酰亚胺固化成型密封用有机硅密封剂的研制  

Development and preparation of the silicone sealant for polyimide curing and molding seals

作　　者：王磊 任河 孙全吉 范召东 Wang Lei;Ren He;Sun Quanji;Fan Zhaodong(Baimtec Materials Co.,Ltd,Beijing 100095)

机构地区：[1]北京航空材料研究院股份有限公司,北京100095

出　　处：《化工新型材料》2025年第1期100-104,共5页New Chemical Materials

摘　　要：通过耐高温抗氧化、抗密闭降解体系和催化剂体系研究,制备得到一种聚酰亚胺固化成型用有机硅密封剂,并对其密封性能进行了考核验证。研制得到的有机硅密封剂耐温等级可达380℃,在350℃×24h老化后仍具备一定弹性,具备优异的耐高温抗密闭降解性能。此外,该有机硅密封剂在高达380℃的聚酰亚胺固化温度下,3MPa的压力下,能够保证热压罐成型工艺所需的密封作用,满足聚酰亚胺复合材料的批量固化成型的需求。Through the study on the high-temperature resistant system,anti-sealing degradation system and catalyst system,a silicon sealant for polyimide curing and molding was prepared,and the sealing property of the silicone sealant was evaluated and verified.The prepared silicone sealant exhibited a temperature resistance of up to 380℃,and still retained a certain extent of elasticity after aging at 350℃for 24h,demonstrating excellent high-temperature resistance and anti-sealing degradation properties.Moreover,the silicone sealant could ensure the sealing effect required by hot-press can molding process at a polyimide curing temperature of up to 380℃and a pressure of 3MPa,which met the demands of the batch preparation of polyimide composites.

关 键 词：耐高温 抗密闭降解 有机硅密封剂 聚酰亚胺 密封 

分 类 号：TQ333.93[化学工程—橡胶工业] TQ433