聚氨醋改性后的單組分聚氨酯密封膠的低溫性...
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樹脂分數對聚氨酯密封膠的TVOC產生的影響
- 發布時間 : 2023-3-17 17:06:35
- Views:
(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.
樹脂分數對聚氨酯密封膠的TVOC產生的影響
(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 : 2023-3-17 17:06:35
- Views:
Information
聚氨酯密封膠在固化過程中的樹脂、偶聯劑水解釋放醇類，所以樹脂和偶聯劑的量對醇類物質釋放量有直接影響。催化劑主要控制樹脂的交聯速度，不同種類的催化劑活性差異較大，樹脂及偶聯劑水解交聯的速度差異也較大，對醇類物質的釋放影響也較大。抗氧劑能夠保護體系內有機成分在高溫下的穩定性，防止其氧化分解。因此，選擇樹脂、偶聯劑、抗氧劑及催化劑4個影響因子。
每個影響因子取兩水平，其中:樹脂份數為400(低),500(高);偶聯劑份數為20(低),40(高);抗氧劑份數為5(低)、巧(高);催化劑種類為甲(低)、乙(高)。
實驗因子較多，選擇部分因子進行實驗設計，通過補充兩個中心點及角點，保證實驗設計的分辨度，避免各因子交互混雜的現象。
根據部分因子實驗設計表開展實驗制備聚氨酯密封膠，并制備測試樣片，待養護到期后再根據VDA 277測試方法進行TVOC測試。不同因子條件下得到的TVOC值，結果如表1所示。
從表1可以看出，選擇不同樹脂份數、偶聯劑份數和抗氧劑份數，都會對聚氨酯密封膠的TVOC產生一定的影響，不同的催化劑的種類也對TVOC影響較大。www.kubee.cn
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