基于装配式建筑单组分硅烷封端聚醚密封胶的性能研究

2022-06-21 04:48:47李建亮
粘接 2022年6期

李建亮

摘要:用于粘结剂、密封剂和涂料的硅烷封端聚合物,它们比聚氨酯、硅酮和溶剂型产品毒性低;硅烷改性聚醚(MS聚合物)是世界范围内使用的众多密封剂、粘结剂和涂料的基础,混合有机聚氨酯比例和无机烷氧基硅烷比例的混合体系结合了传统聚氨酯和硅基产品的优点。综述了MS聚合物的化学性质及其在以硅基封端预聚物为基础的粘结剂、密封剂和涂料中的优缺点,重点对硅烷改性聚醚密封胶在装配式建筑中的应用进行了介绍。为了提供具有彈性粘接或密封的装配式建筑密封胶,特别需要柔性和弹性密封化合物。

关键词:硅烷封端聚合物;密封胶;装配式建筑

中图分类号:TQ436+.6

文献标识码:A文章编号:1001-5922(2022)06-0020-05

Research on the performance of one-component silane terminated polyether sealant based on prefabricated building

LI Jianliang

(Yulin Vocational and Technical College, Yulin 719000, Shaanxi China

)

Abstract:Silane terminated polymers used for adhesives, sealants and coatings are less toxic than polyurethane, silicone and solvent-based products. Silane Modified polyether (MS polymer) is the basis of many sealants, adhesives and coatings used all over the world. The hybrid system of mixing organic polyurethane ratio and inorganic alkoxysilane ratio combines the advantages of traditional polyurethane and silicon-based products. This paper summarizes the chemical properties of MS polymer and its advantages and disadvantages in adhesives, sealants and coatings based on silicon-based terminated prepolymers, focusing on the introduction of application of silane modified polyether sealant in prefabricated buildings. Flexible and elastic sealing compounds are particularly needed in order to provide fabricated building sealants with elastic bonding or sealing.

Key words:silane terminated polymer; sealant; prefabricated building

装配式建筑是指将通过工厂生产出来的预制件在建筑施工现场,按照设计方案将相应的部件进行组装、连接的方式进行建造的建筑。这种建造方式类似于“搭积木”,与传统的建筑施工建造技术相比,大大缩短的建造工期,减少了人力物力,降低了施工成本,且建筑质量能够得到更有效的控制[1]。另外,装配式建筑也适应了当前一些建筑的结构精巧型和复杂性不断发展的现状,开辟了建筑施工技术领域的崭新天地。由于多种原因,硅烷封端预聚物已被用作密封剂、粘结剂和涂料的树脂超过30年[2-3]。“硅烷封端聚合物杂化物”越来越受到关注,因其配方可以提供2个或更多系列聚合物材料的最佳性能,同时限制它们各自固有的弱点。……

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