摘要
优选MS改性硅烷聚醚为主体黏料,以碳酸钙填料粉体为补强原料,添加一定量的DIDP增塑剂、除水剂、硅烷偶联剂、催化剂等功能助剂,制备了一款拉伸模量低、柔韧性和弹性优异的硅烷改性密封胶。试验采用单一排除法,逐一分析讨论填料碳酸钙品种、MS聚合物黏度以及DIDP增塑剂和催化剂用量对硅烷改性密封胶综合性能的影响。研究结果发现,密封胶填料优选纳米碳酸钙和重质碳酸钙复合搭配使用,所制密封胶胶液模量低、拉伸性能突出;MS聚合物黏度越高越好,黏度性能的选择直接影响到密封胶弹性、拉伸力学性能和模量等方面性能;每100份MS聚合物中用15~20份增塑剂,0.2份的催化剂制备的模量性能较低,柔性最好,力学性能优异。
The MS modified silane polyether is preferred as the main binder, the calcium carbonate filler powder is used as the reinforcing mate-rial, and a certain amount of DIDP plasticizer, water removing agent, silane coupling agent, catalyst and other functional additives are added to pre-pare a silane-modified sealant with low tensile modulus, excellent flexibility and elasticity. The single exclusive method is adopted to analyze and dis-cuss the effects of the calcium carbonate varieties, MS polymer viscosity, and the amount of DIDP plasticizer and catalyst on the comprehensive per-formance of the silane modified sealant. The results of the study find that the sealant filler preferably uses the nano calcium carbonate in combination with the ground calcium carbonate. The produced sealant liquid has a low modulus and outstanding tensile properties;the viscosity performance has a direct effect on the elasticity, tensile property and modulus of sealant, therefore the higher viscosity of the MS polymer the better;The usage of 15 to20 portions of plasticizer per 100 portions of MS polymer and 0.2 portions of catalyst will prepare the sealant with a lower modulus performance, best flexibility and excellent mechanical properties.
作者
杨超群
陈炳耀
陈德启
彭小琴
全文高
YANG Chao-qun;CHEN Bing-yao;CHEN De-qi;PENG Xiao-qin;QUAN Wen-gao(Guangdong Sanvo Chemical Industry Technology Limited,Zhongshan 528429,China;Guangdong Sanvo Holdings Ltd.,Zhongshan 528429,China)
出处
《化学与粘合》
CAS
2021年第1期44-47,共4页
Chemistry and Adhesion
