Silicone sealants ua avea ma filifiliga muamua a polofesa ma DIYers tutusa pe a oʻo mai i le faʻamaufaʻailogaina o mea eseese. Silicone sealants o loʻo i ai mea faʻapipiʻi sili ona lelei ma le faʻaogaina, e maua ai le tumau umi umi mo le tele o talosaga. Faatasi ai ma ituaiga o faʻamaufaʻailoga silikoni faʻatau atu i le maketi, alkoxy silicone sealants ma acetoxy silicone sealants e lua ituaiga lauiloa. I lenei tala fou, o le a matou vaʻavaʻai loloto i meatotino o nei faʻamaufaʻailoga, o latou lelei ma mea le lelei, ma fesoasoani ia te oe e fuafua le filifiliga sili mo ou manaʻoga patino.
1. Structural eseesega:
Muamua, seʻi o tatou suʻesuʻeina le eseesega o le fausaga i le va o le alkoxy ma le acetoxy. O se vaega alkoxy e aofia ai se vaega alkyl (R-) o lo'o fa'apipi'iina i le okesene atom (-O-). O le mea moni, o se tuufaatasiga o se vaega alkyl ma le okesene.
I se isi itu, o le acetoxy e maua mai le acetic acid. E aofia ai se vaega o le acetyl (CH3CO-) o loʻo faʻapipiʻiina i le okesene atom (-O-). O lea la, o le acetoxy e mafai ona manatu o se vaega alkyl ua suia i le okesene i totonu o le acetyl moiety.
O le eseesega i le fausaga e taʻitaʻia ai le eseesega i mea tau vailaʻau ma le faʻaalia i le va o vaega alkoxy ma acetoxy. I le avea ai o se vaega galue aliphatic, o le alkoxy e faʻaalia uiga nucleophilic ma i nisi tulaga e galue o se vaega o ese. O lenei amio e fa'alagolago tele i le fa'asinomaga ma sui o le vaega alkyl o lo'o fa'apipi'i i le okesene atom. Talu ai o vaega alkoxy e fai si le toaga, e manaʻomia se electrophile malosi poʻo se faʻamalosi e amata ai le tali.
I se faʻatusatusaga, o vaega acetoxy e faʻaalia ai le faʻaalia o le gaioiga ona o le i ai o vaega acetyl. O le acetyl moiety ma lona vaega lelei carbon e saofagā i le natura electrophilic o le vaega acetoxy. O le mea lea, o le vaega acetoxy e auai malosi i le acetylation tali, faʻafeiloaʻi le acetyl moiety i isi mole. Acetylation reactions o lo'o i soo se mea i le tuʻufaʻatasia o vailaʻau, mea faʻanatura ma faʻalapotopotoga faʻapitoa eseese.
2. Alkoxy silicone sealants: Faʻaalia avanoa fou
Alkoxy silicone sealants o loʻo faʻatulagaina faʻapitoa faʻamaufaʻailoga e faʻavae i luga ole alkoxy curing technology. O nei fa'amaufa'ailoga ua lauiloa mo a latou mea fa'apipi'i lelei i mea eseese, e aofia ai tioata, sima, ma nisi palasitika. O lo latou gafatia e tetee atu aimaualuga vevelamatete'e fa'avevela UVavea i latou ma filifiliga muamua mo talosaga i fafo. E le gata i lea, o faʻamaufaʻailoga silicone alkoxylated e sili ona leleitetee tau, fa'amautinoa i'uga tumau. Ona o latoumaualalo modulusma maualuga fetuutuunai, e mafai ona latou faʻaogaina faʻagaioiga faʻatasi, faʻapena lelei mo faʻaoga faʻamalosi. O se aoga taua o fa'amaufa'ailoga silikoni alkoxylated o latoumaualalo le manogii le taimi o togafitiga, lea e sili atu ona faʻaoga-tagata i avanoa tapuni.
3.Acetoxy Silicone Sealants: Faʻataʻitaʻiina ma Faʻataʻitaʻiina
Acetoxy silicone sealants, i le isi itu, faʻalagolago ile acetoxy curing technology. O nei fa'amaufa'ailoga ua fa'aaogaina tele mo le tele o tausaga ma ua lauiloa mo a latou mea fa'amaufa'ailoga eseese. Latou te fausia ni sootaga malolosi ma mea fau fale sili ona taatele, e aofia ai tioata, uʻamea ma keramika. Acetoxy silicone sealants o loʻo faʻaalia efaamalolo vavema sili ona leleisusu tetee. O lenei fofo vave e vave ma faigofie ai galuega faatino. Ae peitai, ia nofouta, o le acetoxy silicone sealants e mafai ona faʻaosoina se manogi pei o le vineka pe a faʻamalolo, o lea e taua tele le faʻaleleia o le ea.
4. Filifili le faʻamaufaʻailoga silikoni saʻo
O le malamalama i uiga fa'apitoa o ituaiga fa'amaufa'ailoga silicone ta'itasi e taua tele i le faia o se fa'ai'uga fa'ailoa. O mea taua e pei o le malosi sili, malosi faʻapipiʻi, taimi faʻamalolo, fetuutuunai, manogi ma manaʻoga faʻapitoa e tatau ona mafaufau i ai. Afai e taua tele le tete'e atu i ave o le UV, vevela ogaoga ma le tau i fafo, e masani ona sili atu le fa'amaufa'ailoga silikoni alkoxylated. Acetoxy silicone sealants o loʻo i ai ni mea faʻamalolo vave ma o se filifiliga sili ona lelei mo galuega faʻatino e manaʻomia ai se taimi vave faʻafeiloaʻi ma se sootaga malosi muamua. E le gata i lea, e taua le matauina o ituaiga faʻamaufaʻailoga e lua e maua i lanu eseese, e tuʻuina atu ai filifiliga faʻalelei mo talosaga e manaʻomia ai se faʻaiʻuga mataʻina.
Fa'ai'uga
Faʻatasi, alkoxy ma acetoxy silicone sealants e ofoina atu faʻamanuiaga tulaga ese e faʻatatau i manaʻoga faʻapitoa o galuega. O le fa'ai'uga mulimuli e fa'alagolago i mea fa'apipi'i, taimi fa'amalolo, fetuutuuna'i, manogi ma mea tau le si'osi'omaga. Mafaufau i faʻamatalaga o loʻo tuʻuina atu i lenei tala fou, e mafai ona e filifilia ma le mautinoa le silicone sealant e sili ona fetaui ma ou manaʻoga.
Taimi meli: Iul-26-2023