Tsvagiridzo uye kusimudzira kwepamusoro kuita silicone resin.
1.1 polymer chimiro, zvivakwa uye kushandiswa kwesilicone resin
Silicone resin imhando ye semi-inorganic uye semi-organic polymer ine - Si-O - seyetani huru uye necheni yepadivi ine organic mapoka.Organosilicon resin imhando yepolymer ine mapoka akawanda anoshanda.Aya mapoka anoshanda anoenderera mberi akabatana, kureva kuti, anoshandurwa kuita matatu-dimensional chimiro chekurapa chigadzirwa chisinganyungudika uye chisingaverengeki.
Silicone resin ine yakanakisa zvimiro zveakakwira uye yakaderera tembiricha kuramba, mamiriro ekunze kuchembera, inodzivirira mvura uye hunyoro-uchapupu, yakakwirira yekumisa simba, yakaderera dielectric kurasikirwa, arc kuramba, radiation kuramba, nezvimwe.
Iyo general solution silicone resin inonyanya kushandiswa seyakanyanya polymer yekupisa-inodzivirira coating, mamiriro ekunze anodzivirira coating uye yakakwirira-tembiricha yemagetsi insulation zvinhu.
1.2 tekinoroji shanduko yesilicone resin
Pakati pemhando dzese dzesilicone polymers, silicone resin imhando yesilicone chigadzirwa chakagadzirwa uye chakaiswa kare.Kana ichienzaniswa neyakakura-kumhanya kusimudzira kwesilicone rubber pateni yekuvandudza tekinoroji, kuvandudza tekinoroji yesilicone resin kunonoka, uye budiriro huru yetekinoroji ishoma.Kubva anenge makore makumi maviri apfuura, nekuda kwekufambira mberi kwehunyanzvi hwekunhuhwirira kwema polymers anonhuhwirira eheterocyclic, mamwe acho akatanga kushandiswa mumunda wesilicone resin.Nekudaro, iyo inonyungudutsa muchetura uye yakaoma kurapa mamiriro eanonhuwirira heterocyclic anodzivirira kupisa-anodzivirira mapolymers akaganhura mashandisirwo awo.Mumakore achangopfuura, vanhu vakatanga kutarisisa zvakanyanya kutsvagisa nekuvandudzwa kwesilicone resin.Silicone resin ine yakafara tembiricha siyana uye kuchembera kuramba.Kuita uye hydrophobic hunyoro-humbowo kuita kwakanaka uye zvimwe zvakatanhamara zvakanakira, pane zviratidzo zvekuti iyo silicone resin inogona kunge iine nzvimbo yakakura yekusimudzira mune ramangwana.
2. General silicone resin
2.1 kugadzirwa kweyakajairwa silicone resin
Mhando dzakasiyana dzesilicones dzine akasiyana mbishi zvinhu uye nzira dzekugadzira.Mune bepa rino, maitiro ekugadzira emhando dzinoverengeka dzesilicone resin anongounzwa.
2.1.1 methyl silicone
2.2.1.1 synthesis yemethylsilicone resin kubva kumethylchlorosilane
Methylsilicones inogadzirwa nemethylchlorosilane seyakanyanya mbishi zvinhu.Nekuda kwechimiro chakasiyana uye kuumbwa kwesilicones (iyo crosslinking degree yesilicones, kureva, [CH3] / [Si] kukosha), akasiyana masisitimu mamiriro anodiwa.
Kana yakaderera R / Si ([CH3] / [Si] ≈ 1.0) methyl silicone resin inogadzirwa, iyo hydrolysis uye condensation reaction yekumhanyisa yeiyo main raw material monomers methyltrichlorosilane inokurumidza, uye tembiricha yekuita inofanira kunyatsodzorwa mukati me0 ℃. , uye maitiro anofanirwa kuitwa mune yakasanganiswa solvent, uye nguva yekuchengetera yechigadzirwa chekuita pane tembiricha yekamuri ingori mazuva mashoma.Rudzi urwu rwechigadzirwa haruna kukosha kunoshanda.
Mune synthesis yeR / Si methylsilicone resin, methyltrichlorosilane uye dimethyldichlorosilane inoshandiswa.Kunyangwe iyo hydrolytic condensation reaction yemusanganiswa wemethyltrichlorosilane uye dimethyldichlorosilane ichinonoka zvishoma pane iyo yemethyltrichlorosilane chete, iyo hydrolytic condensation reaction yekumhanya yemethyltrichlorosilane uye dimethyldichlorosilane yakanyanya kusiyana, iyo inowanzo konzerwa nehydrolytic condensation yemethyltrichlorosilane in advance.Iyo hydrolyzate haienderane nereshiyo yemamonomers maviri, uye methyl chlorosilane inowanzoitwa hydrolyzed kuti iite yemuno crosslinking gel, zvichikonzera kushata kwakazara kwezvinhu zvemethyl silicone resin inowanikwa kubva kuhydrolysis yevatatu monomer.
2.2.1.2 synthesis yemethylsilicone kubva kumethylalkoxysilane
Maitiro ekuita kwehydrolysis condensation yemethylalkoxysilane inogona kudzorwa nekuchinja maitiro ekuita.Kutanga kubva kumethylalkoxysilane, methylsilicone resin ine akasiyana madhigirii ekuyambuka anogona kugadzirwa.
Iyo yekutengesa methylsilicones ine mwero dhigirii yekuyambuka ([CH3] / [Si] ≈ 1.2-1.5) inonyanya kugadzirirwa ne hydrolysis uye condensation yemethylalkoxysilane.The monomers of methyltriethoxysilane uye dimethyldiethoxysilane yakanatswa ne deacidification yakasanganiswa nemvura, inowedzerwa ne trace hydrochloric acid kana yakafanira uwandu asidhi yakasimba cation exchange resin (the catalysis effect of macroporous strong acid ion exchange resin iri nani), uye rarama.Ivhu repabonde (rakaomeswa mushure meacidification) rinoshandiswa se catalyst, inopisa uye hydrolyzed.Kana magumo asvika, wedzera huwandu hwakakodzera hwehexamethyldisilazane kuti uregedze catalyst hydrochloric acid, kana kusefa iyo ion exchange resin kana ivhu rinoshanda rinoshandiswa sechigadziriso kumisa condensation reaction.Chigadzirwa chinowanikwa idoro solution yemethylsilicone resin.
2.2.2 methyl phenyl silicone
Iwo makuru ezvigadzirwa zvekugadzirwa kwemaindasitiri emethylphenyl silicone resin ndeye methyltrichlorosilane, dimethyldichlorosilane, Phenyltrichlorosilane uye Diphenyldichlorosilane.Mamwe kana ese ari pamusoro apa monomers anowedzerwa ne solvent toluene kana xylene, yakavhenganiswa muchiyero chakakodzera, inodonhedzwa mumvura pasi pemhirizhonga, tembiricha inodzorwa kune hydrolysis reaction, uye HCl (hydrochloric acid aqueous solution), iyo by-chigadzirwa chekuita, inobviswa. nekugeza nemvura.Iyo hydrolyzed silicone solution inowanikwa, uye ipapo chikamu chemushonga chinoputika kuti chigadzire iyo concentrated silicone doro, uye ipapo iyo silicone resin inogadzirwa nechando condensation kana kupisa condensation reaction, uye yakapedzwa silicone resin inowanikwa kuburikidza nekusefa uye kurongedza.
2.2.3 chinangwa chikuru methyl phenyl vinyl silicone resin uye zvikamu zvayo zvinoenderana
Nzira yekugadzira yemethyl phenyl vinyl silicone resin yakafanana neyemethyl phenyl silicone resin, kunze kwekuti kuwedzera kune methyl chlorosilane uye phenyl chlorosilane monomers, huwandu hwakakwana hwemethyl vinyl dichlorosilane uye mamwe vinyl ane silicone monomers anowedzerwa mu hydrolysis mbishi. zvinhu.Iwo mamonomers akasanganiswa aive hydrolyzed, akashambidzwa uye akaiswa kuti awane yakadzika hydrolyzed silanol, ichiwedzera simbi organic acid munyu catalyst, decompressing kupisa kune yakafanotsanangurwa viscosity, kana kudzora iyo condensation reaction end point zvinoenderana nenguva ye gelation, uye kugadzirira methyl phenyl vinyl silicone resin.
Methylphenyl hydropolysiloxane, iyo inoshandiswa sechikamu checrosslinker mukuwedzera reaction yemethylphenyl vinyl silicone resin, inowanzoita mhete kana mutsara wepolymer ine diki dhigirii repolymerization.Izvo zvinogadzirwa ne hydrolysis uye cyclization yemethylhydrodichlorosilane, kana neCO hydrolysis uye condensation yemethylhydrodichlorosilane, Phenyltrichlorosilane uye trimethylchlorosilane.
2.2.4 yakagadziridzwa silicone
Kugadzirwa kwe blending modified silicone resin ine organic resin inowanzo mu toluene kana xylene solution ye methylphenyl silicone resin, kuwedzera alkyd resin, phenolic resin, acrylic resin uye mamwe ma organic resin, anonyatso kusanganisa zvakaenzana kuti awane chigadzirwa chapera.
Iyo copolymerized modified silicone resin inogadzirwa neakatevedzana emakemikari maitiro.Iyo organic resin inogona kuumbwa nesilicone inosanganisira polyester, epoxy, phenolic, melamine formaldehyde, polyacrylate, nezvimwewo. Nzira dzakasiyana-siyana dzekugadzira dzinogona kushandiswa kugadzira copolymerized silicone resin, asi iyo inonyanya kushanda yekugadzira maindasitiri nzira ndeye copolymerization yesilicone doro uye. organic resin.Kureva, hydrolysis yemethyl chlorosilane uye phenyl chlorosilane monomers pamwe chete kuti vawane hydrolyzed silicon doro remhinduro kana concentrated solution, wobva wawedzera pre synthesized organic resin prepolymer kune catalyst, wozosanganisa co heat evaporation solvent, kuwedzera zinc, zinc naphthenate uye zvimwe zvinokonzeresa, uye cocodensation reaction pa 150-170 dhigirii tembiricha, kudzamara iyo reaction yasvika kwakakodzera viscosity kana kufanotemerwa gelation nguva, kutonhora, Kuwedzera solvent kunyungudika uye sefa kuti uwane chigadzirwa chakapedzwa checopolymerized silicone resin.
Nguva yekutumira: Sep-24-2022