水分含量对双组份硅酮密封胶的影响  

Influence of Moisture Content on Two-component Silicone Sealant

作　　者：刘芳波 江锋 陈建军 张冠琦 Liu Fangbo;Jiang Feng;Chen Jianjun;Zhang Guanqi(Guangzhou Baiyun Chemical Industry Co.,Ltd.,Guangzhou 510540,China)

机构地区：[1]广州市白云化工实业有限公司,广东广州510540

出　　处：《广东化工》2021年第24期45-47,共3页Guangdong Chemical Industry

摘　　要：以α,ω-二羟基聚二甲基硅氧烷,甲基硅油,补强填料混合物为A组分,添加复配交联剂、偶联剂,催化剂的B组分制得脱醇型硅酮密封胶。探讨了体系中不同水分含量对挤出性、硫化速率、硬度及力学性能的影响。结果表明,随着水分含量增加,A组分的挤出性呈现平缓下降、急速下降、再至平缓,外观由流淌转变成具有触变性;当A组分中水分含量在1000~2500 ppm之间时,综合性能最佳。A dealcoholized silicone sealant was prepared withα,ω-dihydroxy polydimethylsiloxane,methyl silicone oil and reinforcing filler mixture as component A,crosslinking agent,coupling agent and as catalyst component B.The results showed that as the moisture content increased,the extrudability of component A showed a gradual decline,rapid decline,and then to a gentle phenomenon,and the appearance changed from flowing to thixotropy;when the moisture content of the A component was between 1000 and 2500 ppm,the overall performance was the best.

关 键 词：双组份 硅酮密封胶 水分含量 硫化速率 施工性能 力学性能 

分 类 号：TQ436.6[化学工程]