Su'esu'ega ma atina'e o le dimethyldiethoxysilane

Ole tali lautele ole silicone resin e masani ona faʻaaogaina e avea ma polymer autu ole faʻafefeteina vevela, faʻafefeteina o le tau ma mea faʻapipiʻi eletise maualuga.

1.2 faʻaleleia faʻapitoa o resini silikoni

Faatasi ai ma ituaiga uma o polymers silicone, resin silicone o se ituaiga o oloa silicone synthesized ma faaaoga vave.Pe a faʻatusatusa i le televave o le atinaʻeina o le faʻafouina o le faʻaleleia o tekonolosi, o le faʻaleleia atili o tekonolosi o le resini silicone e telegese, ma e laʻititi le tele o mea faʻatekonolosi.Talu mai le tusa ma le 20 tausaga talu ai, ona o le alualu i luma faʻapitoa o polymers faʻafefete vevela heterocyclic manogi, o nisi oi latou na faʻaaogaina muamua i le fanua o le resini silicone.Ae ui i lea, o le solvent toxicity ma le faigata o le fofoina o le manogi heterocyclic heat-resistant polymers na faʻatapulaaina ai lo latou faʻaogaina.I tausaga talu ai nei, na amata ona gauai atu tagata i le suʻesuʻega ma le atinaʻeina o resini silicone.Silicone resin e iai le lautele o le vevela ma le matua tetee.O le faʻatinoga ma le hydrophobic moisture-proof performance e lelei ma isi faʻamanuiaga mataʻina, o loʻo i ai faʻailoga e mafai e le silicone resin ona maua se avanoa faʻalautele tele i le lumanaʻi.

2. Sili silicone resini lautele

2.1 gaosiga faagasologa o resini silicone lautele

O ituaiga eseese o silicones e eseese mea mata ma auala faʻapipiʻi.I totonu o lenei pepa, o le gaosiga o le gaosiga o le tele o ituaiga o resini silicone o loʻo faʻaalia.

2.1.1 methyl silicone

2.2.1.1 fa'asologa o le resini methylsilicone mai le methylchlorosilane

Methylsilicones o loʻo faʻapipiʻiina ma le methylchlorosilane e avea ma mea autu autu.Ona o le fausaga eseese ma le tuufaatasiga o silicones (le crosslinking tikeri o silicones, ie, [CH3] / [Si] tau), eseese tulaga synthesis e manaomia.

Pe a faʻapipiʻiina le maualalo o le R / Si ([CH3] / [Si] ≈ 1.0) methyl silicone resin, o le hydrolysis ma le condensation saosaoa faʻafefe o le monomers methyltrichlorosilane mea mata e matua vave lava, ma o le vevela o le tali e tatau ona pulea lelei i totonu ole 0 ℃ , ma o le tali e tatau ona faia i totonu o se solvent faʻapipiʻi, ma o le taimi e teu ai le oloa tali i le vevela o le potu e na o ni nai aso.O lenei ituaiga oloa e itiiti lona aoga.

I le faʻasologa o le R / Si methylsilicone resin, methyltrichlorosilane ma dimethyldichlorosilane faʻaaogaina.E ui o le hydrolytic condensation reaction o le faʻafefiloi o le methyltrichlorosilane ma le dimethyldichlorosilane e fai si faʻagesegese nai lo le methyltrichlorosilane naʻo ia, o le hydrolytic condensation reaction speed o le methyltrichlorosilane ma le dimethyldichlorosilane e matua ese lava, lea e masani ona mafua mai i le condensation hydrolytic o le methyltrichlorosilane muamua.O le hydrolyzate e le o ogatasi ma le fua faatatau o monomers e lua, ma o le methyl chlorosilane e masani ona faʻafefeteina e fausia ai se gel fesoʻotaʻi faʻapitonuʻu, e mafua ai le le lelei o meatotino o le methyl silicone resin maua mai le hydrolysis o le tolu monomer.

2.2.1.2 fa'asologa o le methylsilicone mai le methylalkoxysilane

Ole fua ole tali ole hydrolysis condensation ole methylalkoxysilane e mafai ona pulea e ala ile suia o tulaga tali.Amata mai le methylalkoxysilane, methylsilicone resin ma tikeri crosslinking eseese e mafai ona synthesized.

O le methylsilicones faʻatau ma le tulaga feololo o fesoʻotaʻiga ([CH3] / [Si] ≈ 1.2-1.5) e tele lava ina saunia e le hydrolysis ma le condensation o le methylalkoxysilane.O monomers o le methyltriethoxysilane ma le dimethyldiethoxysilane faʻamamaina e le deacidification e faʻafefiloi ma le vai, faʻaopoopo i le suʻega o le hydrochloric acid poʻo le aofaʻi talafeagai o le resin fesuiaiga o le cation acid (e sili atu le aafiaga catalysis o le resin exchange ion macroporous malosi), ma ola.Omea fa'afeusuaiga (fa'amago ina ua uma ona fa'asa'o) e fa'aaogaina e fai ma fa'amalosi, fa'avevela ma fa'asusu.Pe a oʻo i le pito iʻuga, faʻaopopo le aofaʻi talafeagai o le hexamethyldisilazane e faʻafefe ai le faʻamaʻi o le hydrochloric acid, poʻo le faʻamamaina o le resini fesuiaiga o le ion poʻo le omea malosi e faʻaaogaina e faʻagata ai le faʻafefe o le condensation.O le oloa na maua o se vaifofo ava o le methylsilicone resin.

2.2.2 methyl phenyl silicone

O mea autu autu mo le gaosiga o pisinisi o le methylphenyl silicone resin o le methyltrichlorosilane, dimethyldichlorosilane, Phenyltrichlorosilane ma Diphenyldichlorosilane.O nisi po'o mea uma o lo'o ta'ua i luga e fa'aopoopoina i le solvent toluene po'o le xylene, fa'afefiloi i le fua sa'o, fa'apa'u i le vai i lalo o le fa'avevesi, fa'atonutonu le vevela mo le fa'afefeteina o le hydrolysis, ma le HCl (hydrochloric acid aqueous solution), o le mea e maua mai i le tali, e aveese. e ala i le fufulu vai.E maua le vaifofo hydrolyzed silicone, ona fa'amama lea o se vaega o le solvent e fausia ai le silikoni ava malosi, ona saunia ai lea o le resini silicone e ala i le fa'afefe malulu po'o le fa'afefeteina o le vevela, ma maua ai le resin silicone mae'a e ala i le fa'amamaina ma le afifiina.

2.2.3 fa'amoemoe lautele methyl phenyl vinyl silicone resin ma ona vaega fa'atatau

O le gaosiga o le methyl phenyl vinyl silicone resin e talitutusa ma le methyl phenyl silicone resin, sei vagana ai i le faaopoopo atu i le methyl chlorosilane ma le phenyl chlorosilane monomers, o se aofaiga talafeagai o methyl vinyl dichlorosilane ma isi vinyl o loʻo i ai silicone monomers ua faʻaopoopoina i le hydrolysis mata. meafaitino.O monomers fefiloi sa hydrolyzed, fufulu ma fa'atumauina ina ia maua le silanol hydrolyzed concentrated, faaopoopo u'amea organic acid masima catalyst, decompressing vevela i le viscosity muai faamatalaina, po o le pulea o le condensation tali iuga pito e tusa ma le taimi gelation, ma saunia methyl phenyl vinyl resin silicone.

Methylphenyl hydropolysiloxane, lea e faʻaaogaina e fai ma vaega o le crosslinker i le faʻaopoopoga o le tali ole methylphenyl vinyl silicone resin, e masani lava o se mama poʻo se polymer linear ma sina tikeri o le polymerization.O lo'o gaosia e ala ile hydrolysis ma le cyclization ole methylhydrodichlorosilane, po'o le CO hydrolysis ma le condensation ole methylhydrodichlorosilane, Phenyltrichlorosilane ma trimethylchlorosilane.

2.2.4 silikoni suia

O le gaosiga o le faʻafefiloi o resini silikoni ua suia ma resini faʻalaʻau e masani lava ile toluene poʻo le xylene solution o le methylphenyl silicone resin, faʻaopoopo le resin alkyd, resin phenolic, resin acrylic ma isi resins organic, faʻafefiloi atoatoa ina ia maua le oloa maeʻa.

O le copolymerized suia silicone resin ua saunia e se faasologa o tali kemikolo.O resins organic e mafai ona copolymerized ma silicone e aofia ai polyester, epoxy, phenolic, melamine formaldehyde, polyacrylate, ma isi. E mafai ona faaaoga auala synthetic eseese e saunia ai le resin silicone copolymerized, ae o le auala sili atu ona aoga gaosiga o alamanuia o le copolymerization o le silikoni ava malosi ma. resini fa'aola.O lona uiga, hydrolysis o methyl chlorosilane ma phenyl chlorosilane monomers faatasi e maua hydrolyzed silicon vaifofo ava malosi po o le fofo concentrated, ona faaopoopo muamua synthesized resin resin prepolymer i le catalyst, ona fefiloi co vevela evaporation solvent, faaopoopo zinc, zinc naphthenate ma isi catalysts, ma tali cocondensation i 150-170 tikeri vevela, seia oo atu le mea tali viscosity talafeagai po o le taimi gelation fuafuaina, cooling, Faaopoopo solvent e faataape ma faamama e maua ai le oloa maeʻa o resin silicone copolymerized.