Patlisiso le nts'etsopele ea dimethyldiethoxysilane

Resin ea silicone ea tharollo e akaretsang e sebelisoa haholo-holo e le polymer ea mantlha ea masela a sa keneleng mocheso, lesela le hanyetsanang le boemo ba leholimo le lisebelisoa tsa motlakase tse nang le mocheso o phahameng oa mocheso.

1.2 phetoho ea tekheniki ea resin ea silicone

Har'a mefuta eohle ea li-polymers tsa silicone, resin ea silicone ke mofuta oa sehlahisoa sa silicone se kopantsoeng le ho sebelisoa esale pele.Ha ho bapisoa le nts'etsopele ea lebelo le phahameng ea theknoloji ea tokiso ea lirabara tsa silicone, ntlafatso ea mahlale a silicone resin e batla e lieha, 'me likhatelopele tse kholo tsa mahlale li fokola.Ho tloha lilemong tse ka bang 20 tse fetileng, ka lebaka la tsoelo-pele ea theknoloji ea li-polymers tse sa keneleng mocheso oa heterocyclic, tse ling tsa tsona li ne li sebelisoa qalong tšimong ea silicone resin.Leha ho le joalo, chefo ea solvent le maemo a thata a ho folisa a monko o monate oa heterocyclic li-polymers tse hananang le mocheso li ile tsa fokotsa ts'ebeliso ea tsona.Lilemong tsa morao tjena, batho ba ile ba qala ho ela hloko haholoanyane lipatlisiso le nts'etsopele ea resin ea silicone.Resin ea silicone e na le mefuta e mengata ea mocheso le ho hanyetsa botsofali.Ts'ebetso le ts'ebetso ea bopaki ba mongobo ea hydrophobic li ntle le melemo e meng e ikhethang, ho na le matšoao a hore resin ea silicone e kanna ea ba le sebaka se seholo sa nts'etsopele nakong e tlang.

2. Resin e akaretsang ea silicone

2.1 ts'ebetso ea tlhahiso ea resin e akaretsang ea silicone

Mefuta e fapaneng ea li-silicone e na le lisebelisoa tse tala le litsela tsa maiketsetso.Ka pampiri ena, ts'ebetso ea tlhahiso ea mefuta e mengata ea li-silicone resin e hlahisoa feela.

2.1.1 silicone ea methyl

2.2.1.1 motsoako oa methylsilicone resin ho tloha methylchlorosilane

Methylsilicones e entsoe ka methylchlorosilane e le eona ntho e ka sehloohong e tala.Ka lebaka la sebopeho se fapaneng le sebopeho sa li-silicone (tekanyo ea crosslinking ea silicones, ke hore, boleng ba [CH3] / [Si]), maemo a fapaneng a ho kopanya a hlokahala.

Ha resin e tlase ea R / Si ([CH3] / [Si] ≈ 1.0) methyl silicone resin e entsoe, lebelo la hydrolysis le condensation reaction ea monomers ea mantlha ea methyltrichlorosilane e potlakile, mme mocheso oa karabelo o tlameha ho laoloa ka thata ka har'a 0 ℃. , 'me karabelo e lokela ho etsoa ka motsoako oa motsoako,' me nako ea polokelo ea sehlahisoa sa karabelo mocheso oa kamore ke matsatsi a seng makae feela.Sehlahisoa sa mofuta ona se na le molemo o fokolang.

Ka har'a motsoako oa R / Si methylsilicone resin, methyltrichlorosilane le dimethyldichlorosilane li sebelisoa.Le hoja karabelo ea hydrolytic condensation ea motsoako oa methyltrichlorosilane le dimethyldichlorosilane e le butle ho feta ea methyltrichlorosilane feela, lebelo la hydrolytic condensation reaction la methyltrichlorosilane le dimethyldichlorosilane le fapane haholo, hangata le bakoa ke hydrolytic condensation ea methyltrichlorosilane in advance.Hydrolyzate ha e tsamaellane le karo-karolelano ea li-monomers tse peli, 'me methyl chlorosilane hangata e entsoe ka hydrolyzed ho etsa gel e kopanyang ea lehae, e bakang thepa e futsanehileng ea resin ea methyl silicone e fumanoeng ho hydrolysis ea monoma e meraro.

2.2.1.2 tlhahiso ea methylsilicone ho tloha methylalkoxysilane

Sekhahla sa karabelo ea hydrolysis condensation ea methylalkoxysilane e ka laoloa ka ho fetola maemo a karabelo.Ho qala ho tloha methylalkoxysilane, resin ea methylsilicone e nang le likhato tse fapaneng tsa crosslinking e ka etsoa.

Li-methylsilicones tsa khoebo tse nang le tekanyo e itekanetseng ea crosslinking ([CH3] / [Si] ≈ 1.2-1.5) hangata e lokiselitsoe ke hydrolysis le condensation ea methylalkoxysilane.Li-monomers tsa methyltriethoxysilane le dimethyldiethoxysilane tse hloekisitsoeng ka deacidification li tsoakane le metsi, li eketsoa ka trace hydrochloric acid kapa palo e loketseng ea resin e matla ea cation exchange resin (phello ea catalysis ea macroporous strong acid ion exchange resin e molemo), 'me e phele.Letsopa la thobalano (le omisitsoeng ka mor'a acidification) le sebelisoa e le catalyst, heated and hydrolyzed.Ha ho fihleloa ntlha, eketsa palo e lekaneng ea hexamethyldisilazane ho fokotsa catalyst hydrochloric acid, kapa ho hloekisa resin ea ion kapa letsopa le sebetsang e le mokhoa oa ho felisa condensation reaction.Sehlahisoa se fumanoeng ke tharollo ea joala ea methylsilicone resin.

2.2.2 methyl phenyl silicone

Lisebelisoa tse ka sehloohong tsa tlhahiso ea indasteri ea methylphenyl silicone resin ke methyltrichlorosilane, dimethyldichlorosilane, Phenyltrichlorosilane le Diphenyldichlorosilane.Tse ling kapa li-monomers tse ka holimo li kenyelelitsoe ka toluene kapa xylene ea solvent, e kopantsoeng ka tekanyo e nepahetseng, e oela ka metsing tlas'a pherekano, mocheso o laoloang bakeng sa karabelo ea hydrolysis, le HCl (hydrochloric acid aqueous solution), sehlahisoa sa karabelo, se tlosoa. ka ho hlatsoa metsi.Tharollo ea silicone ea hydrolyzed e fumanoa, ebe karolo ea mokelikeli e fetoha mouoane ho etsa joala ea silicone e tsitsitseng, ebe resin ea silicone e lokisoa ke condensation e batang kapa mocheso oa mocheso oa mocheso, 'me resin e phethiloeng ea silicone e fumanoa ka ho sefa le ho paka.

2.2.3 sepheo se akaretsang sa methyl phenyl vinyl silicone resin le likarolo tsa eona tse amanang

Ts'ebetso ea tlhahiso ea methyl phenyl vinyl silicone resin e tšoana le ea methyl phenyl silicone resin, ntle le hore ntle le methyl chlorosilane le phenyl chlorosilane monomers, palo e nepahetseng ea methyl vinyl dichlorosilane le vinyl tse ling tse nang le silicone monomers li kenngoa ka har'a hydrolysis e tala. lisebelisoa.The monomers tsoakiloeng ne hydrolyzed, hlatsoa le concentrated ho fumana concentrated hydrolyzed silanol, phaella ka ho re tšepe organic acid letsoai catalyst, decompressing mocheso ho predefined viscosity, kapa ho laola condensation itsoara joang qetellong ntlha ho ea ka gelation nako, le lokisetsa methyl phenyl vinyl silicone resin.

Methylphenyl hydropolysiloxane, e sebelisoang e le karolo ea crosslinker ho phaella karabelo ea methylphenyl vinyl silicone resin, hangata ke lesale kapa polymer e nang le tekanyo e nyane ea polymerization.Li hlahisoa ke hydrolysis le cyclization ea methylhydrodichlorosilane, kapa ka CO hydrolysis le condensation ea methylhydrodichlorosilane, Phenyltrichlorosilane le trimethylchlorosilane.

2.2.4 silicone e fetotsoeng

Tlhahiso ea ho kopanya resin e fetotsoeng ea silicone e nang le resin ea organic hangata e le toluene kapa xylene solution ea methylphenyl silicone resin, ho eketsa resin ea alkyd, phenolic resin, resin ea acrylic le li-organic resin tse ling, ho kopanya ka ho feletseng ho lekana ho fumana sehlahisoa se felileng.

Resin ea silicone e fetotsoeng ea copolymerized e hlophisitsoe ke letoto la karabelo ea lik'hemik'hale.Li-resin tsa tlhaho tse ka kopanngoang le silicone li kenyelletsa polyester, epoxy, phenolic, melamine formaldehyde, polyacrylate, joalo-joalo Ho ka sebelisoa litsela tse fapa-fapaneng tsa maiketsetso ho lokisetsa resin ea silicone ea copolymerized, empa mokhoa o sebetsang haholoanyane oa tlhahiso ea indasteri ke copolymerization ea silicone joala le. resin ea tlhaho.Ke hore, hydrolysis ea methyl chlorosilane le phenyl chlorosilane monomers hammoho ho fumana hydrolyzed silicon alcohol solution kapa concentrated solution, ebe o eketsa prepolymer ea pre synthesized organic resin prepolymer, ebe o kopanya motsoako oa mouoane oa mocheso, ho eketsa zinki, zinki naphthenate le lisebelisoa tse ling, le karabelo ea cocodensation ka mocheso oa likhato tse 150-170, ho fihlela thepa ea karabelo e fihla viscosity e nepahetseng kapa nako e reriloeng esale pele, ho pholisa, Ho eketsa mokelikeli ho qhibiliha le ho sefa ho fumana sehlahisoa se felileng sa resin ea silicone ea copolymerized.