徐尚仲，陈炳耀，姚荣茂，彭小琴，全文高

摘 要：优选硅烷改性聚醚（简称MS聚合物）为主材料，以碳酸钙复合填料补强，搭配适量的紫外吸收剂、光稳定剂、交联剂以及催化剂等功能助剂，制备得到一种具有优良粘接力学性能、贮存稳定性与相容性较佳的双组分硅烷改性聚醚密封胶（MS胶）。试验采用单一比较法，逐一研究了基础聚合物、补强填料与增塑剂选型和催化剂用量对密封胶硫化速率、粘接性能及其贮存稳定性等综合性能的影响。结果发现，关键原料的选型与功能助剂添加量的调整直接影响到密封胶的表干硫化时间、粘接性能和贮存稳定性。当以S203H与S303H（质量比3∶2）复配作为基材聚合物，聚醚二元醇为增塑剂，CCR-300与G-120按照3∶2的比例复配作为补强填料，二醋酸二丁基锡作为催化剂原料，以此配方制备的双组分密封胶表干时间为12 min，贮存性能稳定，拉伸模量0.19 MPa，弹性恢复率97%。

关键词：双组分;硅烷改性聚醚;弹性恢复率

中图分类号：TQ436+.6 文献标识码：A     文章编号：1001-5922（2021）12-0012-04

Research on the Temperature Resistance Trend of Two-Component Silicone Structural Sealant

Xu Shangzhong2， Chen Bingyao1， Yao Rongmao1， Peng Xiaoqin2， Quan Wengao2

（1.Guangdong Sanvo Chemical Industry Technology Limited， Zhongshan 528429， China ; 2.Guangdong Sanvo Holding Co.， Ltd.， Zhongshan 528325， China）

Abstract：Silane-modified polyether （MS polymer for short） is preferably the main material， and calcium carbonate composite filler is adopted to increase the strength. Meanwhile， a appropriate amount of ultraviolet absorbent， light stabilizer， cross-linker， catalyst and other functional additives are utilized. Thus， a Two-component silane-modified polyether sealant （MS sealant） is prepared， which has excellent adhesion mechanical properties， storage stability and compatibility. Furthermore， a single comparative method is used to study the effects of base polymer， reinforcing filler and plasticizer type selection and catalyst dosage on the comprehensive properties， namely sealant vulcanization rate， adhesive performance， storage stability and others. Where， the selection of key raw materials and the adjustment of the amount of functional additives directly affect the surface dry vulcanization time， bonding performance and storage stability of the sealant. When S203H and S303H （mass ratio 3∶2） are compounded as base polymers， polyether diol is used as plasticizers， CCR-300 and G-120 are compounded as reinforcing fillers in the ratio of 3∶2， and dibutyl tin diacetate is used as catalyst raw materials， the surface dry time of the two-component sealant prepared with this formula is 12 min， the storage performance is stable， the tensile modulus is 0.19 MPa， and the elastic recovery rate is 97%.

Key words：two-component; silane-modified polyether; elastic recovery rate

0 引言

硅烷改性聚醚（簡称MS聚合物）密封胶不仅具有有机硅的优异性能，无须加热、光照或其他特殊条件，而且在室温环境中通过接触空气水蒸气就可以固化为弹性橡胶体，施工、养护工艺简单便捷[1]。同时MS胶还综合了聚氯酯的各项优势，具有优异的耐水性与耐高低温性，卓越的耐候性以及不含异氰酸酯、无需底涂、可喷涂、耐候等性能，适用于石材、金属、玻璃、木材等各类建材基材的粘接，成为家装装饰、粘接密封施工的理想材料。……