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硅烷改性聚氨酯密封膠膠料低溫混煉法
- 發(fā)布時間 : 2023-3-8 12:07:59
- 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.
硅烷改性聚氨酯密封膠膠料低溫混煉法
(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 : 2023-3-8 12:07:59
- Views:
Information
1、將硫磺、促進劑TMTD, PIB2300以1: 1: 2的配比在室溫條件下用開口反應器攪拌成均勻膏狀母膠，取出后備用。
2、用開煉機將基體材料混合均勻后，依配方加入氧化鋅、硬脂酸、抗氧劑1010,碳酸鈣和炭黑，后加入配方中30%的PIB2300,混合均勻后出膠備用。
3、將步驟2的硅烷改性聚氨酯密封膠膠料切碎成邊長3cm的碎塊，置于開口反應器中，并再將配方中350/a的PIB2300倒入開口反應器，插入金屬田字攪拌漿，將反應器開口用法蘭合上，用加熱套200℃加熱，并轉(zhuǎn)動攪拌槳，充分攪拌2小時后將配方中剩余35%的PIB2300加入開口反應器，繼續(xù)攪拌2小時。
4、準備加入硫化劑與硫化促進劑的母膠，為了防止提前起硫，需要將開口反應器的加熱套溫度降低至120℃后再加入硫化劑、硫化促進劑母膠，高速攪拌至均勻后出膠冷卻。
5,混煉結(jié)束后停放，并依照硫化曲線所得數(shù)據(jù)在170攝氏度下用烘箱熱處理，以模擬混煉膠涂敷在輪胎內(nèi)側(cè)后烘烤的過程。
此混煉過程也可通過密煉機完成，但密煉機在高溫下，漏料嚴重，難以清洗，損失較大，且PIB的添加需要分成更多次才能混合均勻，否則會產(chǎn)生打滑，無法混勻。
硅烷改性聚氨酯密封膠膠料低溫混煉法
1、用開煉機將基體材料混合均勻后，依配方加入氧化鋅、硬脂酸、抗氧劑1010.碳酸鈣和炭黑、促進劑和硫化劑，加入配方中40%的PIB2300。
2、在開煉機上分三次加入P1B2300，最后在開煉機上獲取膏狀硅烷改性聚氨酯密封膠膠料，調(diào)大輥距以方便出膠。
3、由于硅烷改性聚氨酯密封膠膠料需要加入IOOphr以上的PIB2300，硅烷改性聚氨酯密封膠膠料在開煉機上及其難以操作，故第2步也可在密煉機中進行，由于硫磺己經(jīng)加入，故不能高溫混煉。將步驟I制備的硅烷改性聚氨酯密封膠膠料切碎后放入密煉機，分多次加入PIB2300，待扭矩平穩(wěn)后再加入下一批。
4,混煉結(jié)束后停放，并依照硫化曲線所得數(shù)據(jù)在170攝氏度下用烘箱熱處理，以模擬混煉膠涂敷在輪胎內(nèi)側(cè)后烘烤的過程。
由于密煉機的剪切力小于開煉機，因此每次能吃料的量有限，且PIB2300為粘稠液體，易發(fā)生打滑，故需要分多次添加。m.hbxqtax.com
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