检测硅烷改性聚氨酯密封胶质量的主要指标

发布时间 : 2024-11-20 17:19:20
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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.

检测硅烷改性聚氨酯密封胶质量的主要指标

(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.

发布时间 : 2024-11-20 17:19:20
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此项指标表征产品的力学性能，主要考察产品对基材(玻璃、铝及不锈钢等)的勃结力的大小，是检测硅烷改性聚氨酯密封胶质量的主要指标。紫外线照射发雾性和热失重分别用于考核硅烷改性聚氨酯密封胶的耐老化能力和耐热老化性的指标。丁基胶经紫外线照射出现发雾或经加热(130 ℃/50 h )热失重不合格，则说明丁基胶中含有挥发性的低分子物质。如果建筑物上使用了由这种丁基硅烷改性聚氨酯密封胶制成的中空玻璃且所选择的干燥剂又为没有吸附这些低分子物质能力的3A分子筛，由于长时间的阳光照射(热和紫外线共同作用)，丁基硅烷改性聚氨酯密封胶中的低分子物质逐渐挥发出来，会在玻璃内表面形成一层妨碍透视的油膜，影响使用效果。

此项指标是表征产品的气密性，是确保中空玻璃寿命的重要技术指标之一。一般认为，与外道硅烷改性聚氨酯密封胶相比，内道丁基胶对中空玻璃的密封寿命的影响占80%。如果使用了水蒸气透过率不合格的丁基胶，用该种丁基胶制成的中空玻璃，没法通过GB/T 11944-2002《中空玻璃》标准中的高温高湿耐久试验:中空玻璃样品在湿度>95% ,温度在( 25土3)℃一(55土3)℃之间有规律的变化并进行224次循环。由于湿度较大，硅烷改性聚氨酯密封胶的水气透过率应较低，否则中空玻璃空气层内有水凝现象。中空玻璃用外道硅烷改性聚氨酯密封胶常识本文介绍的中空玻璃用外道硅烷改性聚氨酯密封胶主要指国内常用硅酮类或聚硫类。其应符合JC/'I'486-2001《中空玻璃用弹性硅烷改性聚氨酯密封胶》标准中的要求。http://www.sdyuantai.com/

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