道路接缝用水分散性RTV-1有机硅密封胶的制备

Preparation of water dispersible dehydration RTV-1 silicone sealant for road joints

以羟基硅油、十二烷基苯磺酸、OP-10、去离子水、有机硅交联剂、二丁基二月桂酸锡、无机填料(碳酸钙、沉淀法白炭黑、硅微粉)为原料,制得水分散性单组分室温硫化(RTV-1)有机硅密封胶。研究了配方中各组分对密封胶性能的影响。确定较佳配方为:100份,αω-二羟基聚二甲基硅氧烷聚合物乳液中,添加3份有机硅交联剂、0.6份二丁基二月桂酸锡、75份无机填料。按此配方制得的水分散性有机硅密封胶的断裂强度为0.49 MPa,断裂伸长率为1018.2%,弹性回复率为80.23%,对混凝土有优异的粘接性能,粘接破坏面积为0,达到道路接缝密封胶JC/T 881-2001的使用标准。

The water dispersive dehydration RTV-1 silicone sealant for road joints was prepared from hydroxy silicone oil,dodecyl benzenesulfonic acid,OP-10,de-ionized water,crosslinker,dibutyltin dilaurate,inorganic fillers(calcium carbonate,precipitated silica,fine silicon powder).The study of the influence of each component on the properties of the sealant showed that for every 100 parts αω-dihydroxy polydimethyl siloxane emulsion made from hydroxy silicone oil,the amount of crosslinker is 3 parts;dibutyltin dilaurate is 0.6 part;inorganic fillers is 75 parts.The dehydration vulcanization silicone sealant features excellent adhesion to the concrete.It has tensile strength of 0.49 Mpa,elongation at break of 1018.2%,elasticity recovery of 80.23%.The adhesion failure of zero meets or even exceeds the standards of silicone sealant for road joints.