Resin ea melamine formaldehyde e fetotsoeng ke polima e fumanoang ka karabelo ea melamine le formaldehyde, e tsejoang hape e le melamine formaldehyde resin kapa melamine resin.
Litšobotsi tsa 'mele: Resin ea melamine formaldehyde e phekotsoeng ha e na 'mala ebile e bonaletsa, e tsitsitse metsing a belang, 'me e ka sebelisoa esita le mochesong oa 150°C. E na le litšobotsi tsa ho itima, litšobotsi tsa arc, le litšobotsi tse ntle tsa mechine.
Thepa ea lik'hemik'hale: Thepa e tala ke melamine le 37% formaldehyde aqueous solution. Karolelano ea molar ea formaldehyde ho melamine ke 2 ~ 3. Linomoro tse fapaneng tsa li-substituent tsa N-hydroxymethyl li hlahisoa ka mohato o le mong, ebe li koaheloa ho ba li-resin tse mela. Maemo a karabelo a fapane, 'me boima ba limolek'hule ba sehlahisoa bo fapane. E ka fapana ho tloha ho e qhibilihang ka metsing ho ea ho hoo e batlang e sa qhibilihe ka metsing, kapa esita le ho sa qhibiliheng le ho tiea. Boleng ba pH bo na le tšusumetso e kholo ho sekhahla sa karabelo. Tharollo ea resin e lokiselitsoeng ka holimo ha e bonolo ho e boloka, 'me ho omisa ho fafatsa hangata ho sebelisoa indastering ho hlahisa phofo e tiileng. Resin ea melamine ha e phekole mocheso oa kamore. Hangata e phekoloa ka mocheso oa mocheso oa 130-150 ° C. Ho eketsa tekanyo e nyane ea asiti ho etsa hore sekhahla sa pheko se eketse sekhahla sa pheko.
Tšebeliso indastering ea matlalo: Ho indasteri ea matlalo, melamine resin ke ntho e sebelisoang ka tloaelo pele ho ho fifala, ho susuoa hape, le ho tlatsa resin, eo har'a eona trimethyl melamine resin e sebelisoang haholo ka amino resin. Amino resin e na le mokhoa oa ho fifala joalo ka aldehyde tanning: prepolymer e kenella letlalong, 'me ha boleng ba pH bo theoha, prepolymer e ikamahanya le limolek'hule tsa boholo bo itseng letlalong. Ka condensation ea e sebetsang -NHCH2OH ka molek'hule le lihlopha tsa amino holim'a ketane ea peptide ea collagen, ho thehoa mokhoa oa covalent cross-linking ho finyella morero oa li-tannins.
Ka lebaka la ts'ebetso e phahameng ea methylal, limolek'hule tsa trimethyl melamine li tloaetse ho fetoha ha polycondensation, li hlahisa limolek'hule tse sa amaneng le li-cross-linear le ho lahleheloa ke ho fifala. Hona joale, mekhoa e sebelisoang ka ho fetisisa le e totobetseng ke ho thibela ka mokhoa o nepahetseng sehlopha sa hydroxymethyl ho fokotsa mosebetsi oa sona, ho thibela condensation e eketsehileng pakeng tsa limolek'hule, kapa ho kenyelletsa lihlopha tsa hydrophilic ka har'a sebopeho sa limolek'hule ho eketsa ho qhibiliha ha metsi.
Hajoale, lisebelisoa tsa ho suloa ha melamine resin li lokisoa haholo lapeng le kantle ho naha ka ho koaheloa ha melamine, dicyandiamide feela kapa e kopantsoe le formaldehyde, 'me li fetoloa ka nepo kamoo ho hlokahalang.
Likopo indastering ea pampiri:
Hobane resin ea melamine formaldehyde e na le lihlopha tsa hydroxymethyl, e ka theha sebopeho sa etherified lipakeng tsa likhoele tsa fiber. Khokahano ena pakeng tsa limolek'hule tse fapaneng e hlahisa metsi, e leng ho etsang hore pampiri e be mongobo. Ka hona, e sebelisoa haholo-holo e le moemeli oa ho matlafatsa metsi le metsi ho indasteri ea pampiri.
Anionic e fetotsoeng melamine formaldehyde resin
Haholo-holo ke sulfonated melamine resin. Ha ho bapisoa, resin e fetotsoeng sulfamate e molemo ebile e sebelisoa haholo. Mofuta ona oa sehlahisoa o ka phekoloa tlas'a maemo a acidic, a sa nke lehlakore kapa a alkaline, 'me a ka ekeletsoa ho slurry kapa a sebelisoa ho roala. Bothata ke hore ha modifier e sebetsana le formaldehyde, ho na le pula le kristale, 'me ho thata ho sefa.
Resin ea melamine formaldehyde e fetotsoeng ea Cationic
Melamine resin e fetotsoeng ka li-reagents tsa cationic tse kang triethanolamine, dimethylamine, joalo-joalo e na le motlakase o motle, o ka kenngoa ka potlako ke likhoele, 'me o ka phekoloa ka boleng bo phahameng ba pH. E qoba litlamorao tse mpe tsa resin e tloaelehileng ea melamine-formaldehyde bosoeu le ho tšoarella ha pampiri. Hona joale, lipatlisiso tse ka sehloohong lefapheng lena lapeng le linaheng tse ling ke ho sebelisa lino tse tahang tsa limolek'hule tse nyenyane, tse kang methanol, butanol, joalo-joalo, e le li-etherifying agents le palo e nyenyane ea cationic modifiers tlas'a catalysis ea p-toluene sulfonic acid ho thibela lihlopha tsa bona tse sebetsang le ho ntlafatsa botsitso ba sehlahisoa. .
Mekhoa e ka sehloohong ea ho fokotsa litaba tsa formaldehyde ea mahala ke: ho sebelisa lintho tse phelang tse nang le bokhoni ba oxidizing, tse kang formic acid le hydrogen peroxide, e ka khonang ho hlahisa formaldehyde ho CO2 le metsi. Nakong ea ts'ebetso ea ho lokisa resin, ho kenngoa li-neutralizers tsa formaldehyde tse kang borax, propylene glycol le sodium bisulfite, 'me ho sebelisoa vacuum distillation.
Likopo indastering ea ho roala
Melamine formaldehyde resin e fetotsoeng ke etherification ea lintho tse tahang tse tlaase (tse kang methanol, butanol, isobutane) e sebelisoa haholo indastering ea ho roala 'me e sebelisoa haholo-holo e le motsoako o kopanyang bakeng sa ho roala metsi. E le thepa e tala bakeng sa li-topcoats le li-primers, e ka etsoa ka li-amino resin tse nang le alkyd resin, polyester resin, acrylic resin, epoxy resin, joalo-joalo, 'me e sebelisoa haholo likoloing, thepa ea ka tlung, lisebelisoa tsa lapeng le liindasteri tse ling.
Tlhahisoleseding e batsi ka resin e fetotsweng ya melamine formaldehyde ya SINOYQX, ka kopo ikopanye le rona ka imeile: [email protected] , kapa o re bolelle ho: +86-28-8411-1861.
Lits'oants'o tse ling le litemana li hlahisoa hape ho tsoa Marang-rang, 'me litokelo tsa molao ke tsa mongoli oa pele. Haeba ho na le tlolo ea molao, ka kopo ikopanye le rona ho hlakola.