中国胶粘剂

建筑门窗环氧树脂接缝材料受气候影响,其粘接性能指标均呈现不稳定性。为改善该问题,利用硅酮类胶粘剂来研究建筑门窗环氧树脂接缝的耐候粘接效果。使用三种不同纳米活性轻质碳酸钙(JT1、JT2和JT3)和四种硅烷偶联剂(KH-550、KH-560、A-151和A-171)来制备硅酮类胶粘剂,并对其性能进行测试。研究结果表明:当添加JT1填料时,硅酮类胶粘剂的挤出性为471 mL/min,弹性恢复率为91%,拉伸模量为0.76 MPa,表明该硅酮类胶粘剂性能较佳。当添加硅烷偶联剂KH-550时,硅酮类胶粘剂的粘接强度为1.14 MPa,建筑门窗环氧树脂接缝耐候黏性较好;当添加硅烷偶联剂A-151时,硅酮类胶粘剂的拉伸强度为1.22 MPa,断裂伸长率为363.7%,接缝力学性能较佳;综合考虑,选取硅烷偶联剂A-151展开后续研究。随着硅烷偶联剂A-151掺量增加,接缝表干时间升高,固化时间降低;选取掺量为0.9%的硅烷偶联剂A-151,更能改善试验门窗环氧树脂接缝的力学性能,提升其耐疲劳性。经该方法优化后的硅酮类胶粘剂应用在建筑门窗环氧树脂接缝中,耐水抗老化、抗紫外线性能均得以提高,且接缝的耐候性能增强。

The bonding properties of epoxy resin joint material of building doors and windows are unstable due to the influence of climate. In order to improve this problem,silicone adhesive was used to study the weatherproof bonding effect of epoxy resin joint of building doors and windows. Three kinds of nano active light calcium carbonate(JT1,JT2 and JT3)and four kinds of silane coupling agents(KH-550,KH-560,A-151 and A-171)were used to prepare silicone adhesive,and their properties were tested. The research results showed that when the filler JT1 was added,the extrudability of silicone adhesive was 471 mL/min,the elastic recovery rate was91%,and the tensile modulus was 0.76 MPa,which indicated that the silicone adhesive had good properties. When the silane coupling agent KH-550 was added,the bonding strength of silicone adhesive was 1.14 MPa,and the epoxy resin joint of building doors and windows had good weather resistance. When the silane coupling agent A-151 was added,the tensile strength of silicone adhesive was 1.22 MPa,the elongation at break was 363.7%,and the mechanical properties of joint were good. After comprehensive consideration,the silane coupling agent A-151 was selected for follow-up research. With the increase of silane coupling agent A-151,the surface dry time of joint increased,and the curing time decreased. The mechanical properties and fatigue resistance of epoxy resin joint of doors and windows could be much improved by selecting the silane coupling agent A-151 with 0.9% content. The silicone adhesive optimized by this method was applied to the epoxy resin joint of building doors and windows,its water resistance,aging resistance and ultraviolet resistance were all improved,and the weathering resistance of joint was also enhanced.