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              一步法合成丁基防水嵌縫密封膠

              • 發布時間 : 2023-6-19 8:55:03
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              (Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

              一步法合成丁基防水嵌縫密封膠

              (Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

              • 發布時間 : 2023-6-19 8:55:03
              • Views:
              Information

                     丁基防水嵌縫密封膠的合成采用端經基聚醚和3一異氰酸醋基丙基三甲氧基硅烷為原料,二月桂酸二丁基錫為催化劑,一步法合成丁基防水嵌縫密封膠。具體合成過程:將500gPPG8000在100℃下減壓脫水1一2h后,在氮氣保護下降溫至50一1100C;按照一定比例加人3一異氰酸醋基丙基三甲氧基硅烷和二月桂酸二丁基錫,混合攪拌,采用二正丁胺一鹽酸法測定和監控NCO的含量,當其含量不再改變時結束反應;加人質量分數為0.1%的無水乙醇去除可能殘留的微量3一異氰酸醋基丙基三甲氧基硅烷;后加人質量分數為0.5%的乙烯基三甲氧基硅烷和0.0l%的活性炭吸附劑,在氮氣氣氛下60℃攪拌2h,吸附除去體系中的錫催化劑,過濾后密封保存,獲得無游離異氰酸醋的丁基防水嵌縫密封膠。合成過程中,控制nNCO):nOH)_1.1一1.3):1,催化劑質量分數為0一0.14%。硅烷改性聚醚密封膠(MS膠)的制備將合成的丁基防水嵌縫密封膠、增塑劑DIDP、填料活性納米碳酸鈣按表1配方加人雙行星機中攪拌混合,在100℃下真空脫水1h后,降至室溫,然后加人乙烯基三甲氧基硅烷(A171),3一氨丙基三甲氧基硅烷和二月桂酸二丁基錫,真空攪拌10min后灌裝出料,制得MS膠。紅外光譜(FTIR:采用布魯克Nicoletis10傅里葉紅外光譜儀測試原料和聚合物的特征峰位,掃描范圍650一4000cm,掃描次數32次;聚合物摩爾質量及其分布:采用Waters2695凝膠滲透色譜(GPC)儀測試;電感禍合等離子體一質譜(ICP-MS:采用硝酸一氫氟酸一高氯酸處理聚合物樣品,并采用Perkinelmer的NexION2000ICP一MS測試吸附后樣品的錫含量;聚合物貯存穩定性:將聚合物在70℃下存儲7d(相當于常溫貯存6個月以上),觀察其豁度的變化;聚合物豁度:采用博勒飛DV2T旋轉粘度計測試;MS膠表干時間和質量損失率:按GB/T134772017測試;邵爾A硬度:按GB/T531.12008測試;拉伸強度和拉斷伸長率:按GB/T528-2009測試;剝離粘接實驗:按GB/T167762005附錄D中的方法B(手拉試驗)測試,基材為陶瓷、玻璃、陽極氧化鋁和不銹鋼。www.caffertyclinic.com

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