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反應型MS密封膠用于汽車風擋玻璃直接粘接
- 發布時間 : 2023-8-8 18:12:11
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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.
反應型MS密封膠用于汽車風擋玻璃直接粘接
(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 : 2023-8-8 18:12:11
- Views:
反應型MS密封膠是在抑制化學反應的條件下,加熱熔融成流體,以便于涂敷,冷卻后膠凝起到粘接作用,之后借助于存在空氣中或者被粘體表面的濕氣與之反應、擴鏈,生成具有高內聚力的高分子聚合物,使粘合力、耐熱性等進一步提高。這種反應型MS密封膠是含有反應性基團的熱塑性樹脂膠粘劑,它的主體成分是端-NCO預聚體,配以與異氰酸醋基不反應的熱塑性樹脂和增粘樹脂以及抗氧劑、催化、士曾塑劑、阻燃劑、防霉劑、填料等制成。反應型MS密封膠主要在汽車頂棚、儀表板、行李箱蓋、側裝飾條以及車燈中得到應用。此外,也可將其用于車門復合裝飾件、PP, ABS,聚碳酸醋車燈罩粘接固定、貨物箱箱板復合、車內裝飾件粘接等。近年來,反應型MS密封膠用于汽車風擋玻璃直接粘接也有報道,但要達到單組分濕氣固化PU風擋膠的性能尚有許多研究工作要做。
單組分濕氣固化PU風擋玻璃膠由于含有活潑的-NC O基團,能與被粘面上或空氣中的微量水分發生反應而固化,要求對濕氣敏感,固化速度快,固化后又要保持優良的彈性,而且要求為單包裝,貯存穩定性好。它是汽車用膠中技術含量較高的產品,也是目前我國汽車用MS密封膠類中用量較大的品種。將汽車風擋玻璃直接粘接到車體的工藝始于20世紀60年代的美國。單組分濕氣固化MS密封膠粘劑最先由美國ESSEX化學公司在20世紀70年代初研制成功,并成功應用于美國通用汽車,1976年奧迪汽車公司也在奧迪C2車型上應用。隨后日本及其他歐洲汽車廠家相繼采用風擋玻璃的直接粘接工藝。由于施工簡便并采用機械施膠,目前世界上95%以上風擋玻璃及側窗玻璃的粘接采用這種膠粘劑。單組分濕氣固化PU風擋膠粘劑,急需開發固化速度快、可紫外線固化和對濕度不敏感的聚氨醋風擋玻璃膠粘劑以取代進口。采用這種玻璃粘接密封工藝,能使風擋玻璃和車身緊密地結合成一個整體,增加了車體剛性及抗扭曲能力,又保證了密封效果。美國聯邦汽車安全標準((FMV SS)第212項規定,汽車以S Okm/h速度與混凝土墻壁沖撞時,風擋玻璃的粘接完整率必須在75%以上。目前美、日、德、法等和我國在轎車風擋玻璃的安裝中幾乎全部采用此工藝,同時在客車的風擋和側窗玻璃也大多采用了粘接方法。www.16878m.com
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