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納米碳酸鈣在硅烷改性聚氨酯密封膠中的應用及其影響因素
- 發布時間 : 2024-10-11 18:51:29
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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.
納米碳酸鈣在硅烷改性聚氨酯密封膠中的應用及其影響因素
(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 : 2024-10-11 18:51:29
- Views:
通過實驗測試了納米碳酸鈣的不同填充值、表面處理劑、吸油值和水分對生產硅烷改性聚氨酯密封膠成品的影響,結合數據進行了具體分析,表明納米碳酸鈣作為高檔填料和流變助劑,應用于密封膠和粘合劑具有良好的觸變性、拉伸強度和斷裂伸長率。
納米碳酸鈣性能穩定,價格低廉,填充量大,廣泛用作硅烷改性聚氨酯密封膠的填料。特別是經脂肪酸表面改性的納米碳酸鈣對室溫硫化硅烷改性聚氨酯密封膠有很好的補強作用,可解決普通碳酸鈣引起的體系易流淌、擠出性差和強度低等缺陷,替代了價格昂貴的氣相白炭黑,實用價值較高。
硅烷改性聚氨酯密封膠為多組分體系,是由端經基聚硅氧烷、含可水解基團的硅烷固化劑、顏料、填料、固化促進劑和增塑劑等組成。其在生產、貯存、施工中對勃度有不同的要求,不同的剪切速率下對茹度的要求也不同。如生產時,在捏合機攪拌中要求茹度低,使得生產需要的電流強度小,減小設備磨耗,易于加工;做成膠貯存時,為防止分層沉降,要求高勃度;在施工中,擠出時需要低勃度以確保流動性,方便立面施工。但是擠出后要求勃度馬上上升,使密封膠固定不變形,不流掛造成厚薄不勻。因此,硅烷改性聚氨酯密封膠要求有良好的觸變性。硅烷改性聚氨酯密封膠的觸變性與硅烷改性聚氨酯密封膠的組成有關,其中納米活性碳酸鈣是縮合型RTV有機硅密封膠重要的補強填料,它具有普通碳酸鈣所沒有的量子尺寸效應、小尺寸效應、表面效應和宏觀量子效應,這些特性使其在磁性、光熱阻、催化性、熔點等方面顯示出極大的優越性。本文主要介紹納米碳酸鈣在硅烷改性聚氨酯密封膠中的應用及其影響因素。http://www.caffertyclinic.com/
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