端硅烷基聚醚树脂的合成及其储存稳定性
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摘要
利用端羟基聚丙二醇与3-异氰酸酯基丙基三甲氧基硅烷在少量催化剂作用下的一步反应,成功合成端硅烷基聚醚树脂。端硅烷基聚醚树脂中较高的水分含量以及遗留在树脂中的高活性催化剂二月桂酸二丁基锡的共同作用导致其储存稳定性较差,通过加入除水剂乙烯基三甲氧基硅烷、使用中等活性催化剂和适度调增反应温度等手段,可确保合成时间较短的前提下,获得储存稳定性和硫化性能均良好的端硅烷基聚醚树脂,该树脂可作为环保型硅烷改性聚醚密封胶用基础聚合物。
Silyl-terminated polyether was successfully synthesized by the one-step reaction between hydroxylterminated polypropylene glycol and 3-(trimethoxysilyl)propyl isocyanate in the presence of a small amount of catalyst.The storage stability of silyl-terminated polyether was not satisfying because of its relative high moisture content and the remaining highly active catalyst of dibutyltindilaurate.Through adding water removal agent of vinyl trimethoxysilane,using catalystwith moderate activity and moderately raising reaction temperature,the synthetic reaction could be finished within a short time,and the resulting silyl-terminated polyether had both of good storage stability and vulcanization property.Therefore,this silyl-terminated polyether could be used as a base polymer of environment friendly silicone modified polyether sealant.
Silyl-terminated polyether was successfully synthesized by the one-step reaction between hydroxylterminated polypropylene glycol and 3-(trimethoxysilyl)propyl isocyanate in the presence of a small amount of catalyst.The storage stability of silyl-terminated polyether was not satisfying because of its relative high moisture content and the remaining highly active catalyst of dibutyltindilaurate.Through adding water removal agent of vinyl trimethoxysilane,using catalystwith moderate activity and moderately raising reaction temperature,the synthetic reaction could be finished within a short time,and the resulting silyl-terminated polyether had both of good storage stability and vulcanization property.Therefore,this silyl-terminated polyether could be used as a base polymer of environment friendly silicone modified polyether sealant.
引文
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[14]许雨晴,胡孝勇,柯勇,等.单组分有机硅改性聚醚密封材料的制备及性能[J].工程塑料应用,2015,43(11):27-30.
[15]杨静,毛旭华,陈世龙,等.单组分透明型有机硅改性聚醚密封胶的制备[J].中国建筑防水,2011(10):18-21.
[2]黄应昌,吕正芸.弹性密封胶与胶黏剂[M].北京:化学工业出版社,2003,435-457.
[3]张同标,倪雅,李建军,等.硅烷改性聚醚密封剂的制备及应用.中国建材科技,2011,20(1):24-26.
[4]李正梅,钱志国,翟剑峰,等.硅烷改性聚醚密封剂的应用和制备进展[C].北京:北京粘接学会第二十三届学术年会暨粘接剂、密封剂技术发展研讨会,2014.
[5]于剑昆.国外硅改性聚醚密封剂的技术进展[J].化学推进剂与高分子材料,2004,2(4):7-10.
[6]单时.旭硝子改性聚醚硅产品的性能及应用[J].化工新型材料,2015,43(7):245-246.
[7]Helmut M.Adhesion promoters[J].Adhesives Age,2000,43(8):28-33.
[8]李小童.聚醚端烯丙基化及其硅烷化技术研究[D].洛阳:河南科技大学,2005.
[9]孙全吉,赵艳芬,黄艳华,等.端烷氧基有机硅改性聚醚的初步研究[J].粘接,2010,31(3):30-32.
[10]蒋海成,张文龙,于昊宇,等.硅烷封端聚合物树脂研究进展[J].化工新型材料,2016,44(3):7-9.
[11]屈增录.硅改性聚醚的制法及在密封剂、胶粘剂中的应用[J].黎明化工,1994(4):1-3.
[12]谢桂容.聚氨酯改性端硅烷聚醚密封胶的研究[D].广州:华南理工大学,2013.
[13]薛纪东,李吉明.单组分硅烷改性聚醚密封胶的研制及应用[J].化学与粘合,2015,37(5):355-358.
[14]许雨晴,胡孝勇,柯勇,等.单组分有机硅改性聚醚密封材料的制备及性能[J].工程塑料应用,2015,43(11):27-30.
[15]杨静,毛旭华,陈世龙,等.单组分透明型有机硅改性聚醚密封胶的制备[J].中国建筑防水,2011(10):18-21.