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配制單組分聚氨酯密封膠由經預處理后的氧化銅粉
- 發(fā)布時間 : 2025-1-25 20:22:18
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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.
配制單組分聚氨酯密封膠由經預處理后的氧化銅粉
(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(fā)布時間 : 2025-1-25 20:22:18
- Views:
與磷破一紐化銅單組分聚氨酯密封膠的配制單組分聚氨酯密封膠由經預處理后的氧化銅粉(商稱,甲)和經預處理后的磷酸溶液(簡稱乙)按一定比例配制而成。配比R實驗證明:比值R愈大,粘接強度愈高,但大到一定限度時,粘接強度提高的趨勢減纓,固化加快。為了兼顧粘接強度和固化速度,R值選在2.5-3.0為宜。先將稱好的氧化銅粉(甲)置于光滑的銅板或玻璃板上,中部留一個小凹坑,用量筒量取磷酸溶倒入凹狐用竹片和玻璃棒將甲和乙攪拌調勻,至能接成長1cm以上的細絲即可使用。注意事項氧化銅與磷酸的反應是放熱反應,如果放出的熱量來不及散發(fā),則反應速度加快溫度驟增,從而使單組分聚氨酯密封膠液迅速凝固,這種現象稱作為爆聚現象。為防止爆聚的發(fā)生,應注意以下事項。
要嚴格做好氧化銅粉和磷酸溶液的預處理。夏季氣溫高,必要時應在導熱性良好的銅鍋里配單組分聚氨酯密封膠,以便于散熱。必要時可將鍋底浸在冷水中配單組分聚氨酯密封膠,以加快散熱速度,防止出現爆聚。大,每次配單組分聚氨酯密封膠量不宜過多,如用單組分聚氨酯密封膠量可同時分成若干分調單組分聚氨酯密封膠,再集中一次用因預處理后的氧化銅和磷酸的溫度比較高,故必須冷卻至室溫后方可使用,否則也有可能發(fā)生爆聚。冬季氣溫低時,宜在玻璃板上調單組分聚氨酯密封膠,以防止單組分聚氨酯密封膠液凍熟否則要將磷酸溶液和被粘接的工件進行預熱。磷酸中的氫氧化鋁在氣提.較低的冬季結晶,因此須置于熱水中浸泡至完全融化后使用。氧化銅粉吸濕牲佬,每次用完后及時加蓋密封在干燥器中保存。如果氧化銅粉受潮,可放在10=200℃烘箱中烘干,然后再密封保存。http://194tt.com/
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