粘结性单组分硅橡胶密封材料的制备与性能研究  

Preparation and Properties Study of Adhesive One-component Silicone Rubber Sealant

作　　者：陈中华[1,2] 黄志彬[1] 林坤华 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]广州集泰化工有限公司,广东广州510520

出　　处：《中国建筑防水》2014年第13期13-17,共5页China Building Waterproofing

摘　　要：将1-烯丙氧基-2,3-环氧丙烷、1,3,5,7-四甲基环四硅氧烷和乙烯基三乙氧基硅烷合成了增黏剂DAVE,以不同端乙烯基硅油、不同质量比配合使用,与含氢硅油发生加成反应,添加乙炔基环己醇、A-171以延长贮存稳定性,从而制备了粘结性单组分硅橡胶密封材料。主要研究了基础胶各组分、增黏剂DAVE等对密封材料性能的影响。结果表明,黏度19 mPa·s与3 000 mPa·s的端乙烯基硅油以质量比8∶100复配作基础聚合物,添加活性氢质量分数为0.8%的含氢硅油,使摩尔比n(Si—H)/n(Si—Vi)为1.2,抑制剂适宜的用量为0.003%,DAVE用量为2%,密封材料具有最佳综合性能。Tackifier DAVE was synthesized by tetramethylcyclotetrasiloxane, allyl glyeidyl ether and vinyl-triethoxy-silane. Adhesive one-component silicone rubber sealant was prepared by mixed vinyl-terminated silicone oil, hydrogen-containing silicone oil, ethynyl cyclohexanol, A-171 and so on. Moreover, the effects of components of polymer, tackifier DAVE etc. on properties of sealant were investigated. The results indicated that sealant has the best performance when the mass ratio of vinyl-terminated silicone oil with viscosity of 19 mPa·s and 3 000 mPa ·s is 8/100, the mass fraction of Si-H group of hydrogen-containing silicone oil is 0.8%, the molar ratio of Si-H/Si-Vi is 1.2, the amount of inhibitor is 0.003% and the amount of DAVE is 2%.

关 键 词：单组分 硅橡胶 密封材料 粘结性 

分 类 号：TU578[建筑科学—建筑技术科学]