Thepa ea metsi (VOC & HAPs) mahala e ka lokisoa ho tloha mokelikeli aliphatic epoxy le moqotetsane polymerized capropone polyols 'me e ka sebelisoa ka thepa e tloaelehileng' me e na le monyetla oa ho nka sebaka sa ho koahela phofo. aliphatic epoxy liquid coatings?Setsebi sa mokhatlo oa indasteri ea epoxy resin se entse kenyelletso e khethehileng matsatsi a seng makae a fetileng.
Thepa ea motheo ea thepa e hlokahalang bakeng sa mohala o mocha oa ho roala phofo e ka qojoa ka ho sebelisa thepa ea setso ea ho fafatsa ka metsi.Liaparo tsena li ka fetoloa ka ho li hlapolla ka metsi kapa ka ho tiisa liphahlo tse entsoeng ka metsi ka li-cellulose thickeners. Ka diglycidyl ether e tloaelehileng ea bisphenol A (bpa) resin, alicyclic epoxy e na le lintlha tse 'maloa tse latelang: phapang pakeng tsa A e le ketane e kholo. aliphatic, karabelo le asiti ka potlako, empa ka amine/amides epoxy e folisang liente tse sebelisoang hangata ha li amehe, ha li na chlorine, viscosity ea 350 centipoise le diglycidyl ether ea bisphenol A (bpa) resin joalo ka 11000 centipoise, ka nako e ts'oanang. e boetse e na le khanyetso e babatsehang ea boemo ba leholimo.Ts'ebeliso ea low viscosity aliphatic epoxy in cationic UV coatings e eketsehile haholo.Ho bile le litlaleho tse ngata mabapi le ho lokisoa le thepa ea mofuta ona oa 100% e tiileng ntle le "VA", empa ho na le lingoliloeng tse 'maloa tse qaqileng mabapi le ts'ebeliso ea eona ho litlolo tsa pheko ea mocheso. E ka sebelisoa bakeng sa tsamaiso ea mocheso ea mocheso, empa tse peli le tsona li na le tse fapaneng tse kang ho roala ha UV ka kakaretso ha se ho fafatsa kaho, ka hona, viscosity ea kaho e phahametse ho feta ho fafatsa mocheso oa ho folisa, ka ho baka mofuta oa cationic coating, metsi a ka sebelisoa e le VOC diluent.
Li-polyols tsa Cepolactone li 'nile tsa sebelisoa e le li-diluents tse sebetsang hantle bakeng sa litlolo tse thehiloeng ho solvent' me li ka potlakisa phekolo ea liphahlo tsa cationic UV.The hydroxyl lihlopha tsa polyols tsena ka cationic UV barbotage ke ke feela potlakisa pheko, empa hape lebisa ho itseng pholiso nahanela ho humidity.Ka mocheso pheko barbotage ka lebaka la mongobo tlaase ka ontong, mongobo ha e thibela ho phekola.Ho ba teng. ea polyols eketsa mamello ea metsi, e le hore metsi a ka sebelisoa e le VOC-mahala thinner ka pente formulations entsoe ka aliphatic epoxies le polyols, e leng ha e le hantle phahameng tiileng coatings organic diluted ka metsi. ho ba sieo ha VOC, le tšebeliso ea mehato e tloaelehileng le e tsebahalang ea pente e thehiloeng metsing ho thibela ho fanyeha le ho laola rheological.Kaha karolo e 'ngoe le e' ngoe e entsoeng ka mokhoa o sa tšoaneng e kopane le metsi, palo ea metsi e ka kenngoa e lekanyelitsoe.Tlhokomelo e lokela ho nkoa ho qoba ho eketsa metsi a mangata ho baka karohano ea mekhahlelo.
Li-cellulosic thickeners li sebetsa hantle ka liphahlo tse entsoeng ka metsi, empa ha ho hlake hore na li sebetsa hantle ka 100% tse tiileng, tse nang le metsi-diluted aliphatic epoxy coatings. .Phuputso ea li-thickeners tse fapa-fapaneng li bontša hore li-cellulose thickeners li na le thepa e ntle ka ho fetisisa e pharaletseng.Mocheso o tlase oa kaho o etsa hore filimi e phekotsoeng e hlahise peel e eketsehileng ea lamunu.China epoxy resin industry association association o ile a re molemo o ka sehloohong oa ho roala phofo o koahetsoe ka katleho e phahameng, bokhoni bo phahameng ke haholo-holo ka ho hlaphoheloa ha phofo ho finyella, ho koahela phofo ho lekana le mofuta ona oa ho roala mokelikeli o hloka tsela e itseng ea ho khutlisa pente e fofang.Kaha pente e hlalositsoeng mona ha e na lihlapolli tsa manyolo bakeng sa ho hlaphoheloa habonolo, metsi a lahlehileng nakong ea ho hlaphoheloa a ka fetoloa habonolo ka ho lekanya conductivity ea motlakase ha ho hlokahala, ho boloka matla ka e hlokang mocheso o tlase oa ho baka ha o bapisoa le mocheso o batlang o phahame oa ho baka o hlokahalang bakeng sa ho roala phofo.Khetho e 'ngoe e hlahlojoang ke ho fafatsa li-anhydrous epoxies, polyols, le li-pigments ka mokhoa oa "Unicarb", o sebetsang hantle ho feta ho roala phofo.Haeba ho se na koae ea mahala ea VOC e hlokahalang, eketsa feela li-solvents ho foromo.
Mabapi le foromo ea lintlha, litsebi tsa mokhatlo oa China epoxy resin industry li itse, bakeng sa pholiso ea cationic hobane alkali e tla khaotsa ho phekola, kahoo li-additives tsohle le li-rheological control agents ha lia lokela ho ba le alkaline, li-pigments tsa alkaline le li-pigments tse tšoaroang ka li-amine li tla thibela ho phekola.Alkalescent haeba damine pigments e tla hape thibela cationic folisa, pigments alkaline le additives ka cationic folisa barbotage e ke ke ea sebelisoa, pheko itšetlehile ka catalyst FC-520 ka palo e nyenyane ea amine sealant volatilization, haeba filimi e le teteaneng haholo kapa ontong e se ventilated, amine. e ke ke ea tlosoa ka ho feletseng ho tloha filimi le ho thibela ho phekola.Viscosity e ile ea eketseha ka keketseho ea polyols branched degree eketsa: tai ea dibasic ho feta tse tharo kapa tse 'nè tsa chelete e kenang ea li-yuan tse tlaase tsa pente, joala le glycol li arolelana tlhokahalo ea ho eketsa palo ea boleng ba epoxy ( R) e ka fumanoa ka ho roala ka thata, tekanyo e phahameng ea epoxy corrosion e ka ntlafatsoa, ho eketseha ha tekanyo ea catalyst ho ka potlakisa lebelo la ho folisa empa hape ho ka fokotsa ho bola, tekanyo ea molar ea epoxy le hydroxyl R e na le tšusumetso e kholo lebelong la ho folisa. .
Leha ho le joalo, alicyclic epoxy e nang le li-caprolactone polyols li na le viscosity e tlase ebile ha li na VOC, seaparo se ka hlapolloa ka metsi ho fafatsa viscosity, cellulose thickener e ka fana ka metsi a hlapollotsoeng ka 100% epoxy e tiileng le polyols e koahelang ho thibela ka katleho ho fokotseha, mokhoa oa ho folisa ka potlako. e khethoa ke mefuta e latelang: tekanyo ea molar ea epoxy le hydroxyl, joala bo bongata le ts'ebetso ea epoxy, tekanyo ea li-catalyst le mocheso o folisang, mokhoa ona o ka sebelisoa habonolo ha ho etsoa pente, hobane mofuta ona oa ho roala bakeng sa cationic. ho phekola pente ea mantlha le substrate ho ka thibela ho folisa.
Nako ea poso: Apr-06-2021