Khemik'hale ea UV e nang le metsi (WB) e bonts'itse kholo e kholo mebarakeng ea mapolanka ea ka hare ea indasteri hobane theknoloji e fana ka ts'ebetso e ntle haholo, tlhahiso e tlase ea solvent le ts'ebetso e eketsehileng ea tlhahiso. Sistimi ea ho roala UV e fa mosebelisi melemo ea ho hanyetsa lik'hemik'hale tse ikhethang le khanyetso, ho hanyetsa li-block tse ntle haholo, li-VOC tse tlase haholo le sebaka se senyenyane sa lisebelisoa se nang le sebaka se fokolang sa polokelo se hlokahalang. Lisebelisoa tsena li na le thepa e bapisoang hantle le lisebelisoa tse peli tsa urethane ntle le mathata a li-crosslinkers tse kotsi le mathata a bophelo ba pitsa. Sistimi ea kakaretso e na le litšenyehelo tse tlase ka lebaka la lebelo le eketsehileng la tlhahiso le litšenyehelo tse tlase tsa matla. Melemo eona ena e ka ba molemo bakeng sa lits'ebetso tsa kantle tse sebelisoang fekthering tse kenyelletsang lifensetere le liforeimi tsa mamati, siding le tse ling tsa leloala. Likarolo tsena tsa mebaraka ka tloaelo li sebelisa li-emulsion tsa acrylic le li-dispersions tsa polyurethane hobane li na le khanya e ntle haholo le ho boloka mebala, 'me li bonts'a botsitso bo phahameng. Thutong ena, li-resin tsa polyurethane-acrylic tse nang le ts'ebetso ea UV li hlahlobiloe ho latela litlhaloso tsa indasteri bakeng sa lits'ebetso tsa mapolanka a kahare le kantle a indasteri.
Mefuta e meraro ea liphahlo tse thehiloeng ho solvent hangata li sebelisoa lits'ebetsong tsa mapolanka a indasteri. Nitrocellulose lacquer hangata ke motsoako o tlase oa nitrocellulose le oli kapa alkyds e thehiloeng ka oli. Liaparo tsena li omella kapele 'me li na le bokhoni bo phahameng ba ho benya. Hangata li sebelisoa lits'ebetsong tsa thepa ea ka tlung. Ba na le bothata ba ho ba mosehla ha nako e ntse e ea 'me ba ka fetoha brittle. Ba boetse ba na le khanyetso e fokolang ea lik'hemik'hale. Li-lacquers tsa Nitrocellulose li na le li-VOC tse phahameng haholo, hangata ho 500 g/L kapa ho feta. Li-lacquers tse entsoeng esale pele ke motsoako oa nitrocellulose, oli kapa li-alkyds tse entsoeng ka oli, li-plasticizers le urea-formaldehyde. Ba sebelisa motsoako o fokolang oa asiti joalo ka butyl acid phosphate. Liaparo tsena li na le sethala sa bophelo ba hoo e ka bang likhoeli tse 'nè. Li sebelisoa ka thepa ea ofisi, ea mekhatlo le ea bolulo. Li-lacquers tse entsoeng esale pele li na le lik'hemik'hale tse molemo ho feta tsa nitrocellulose lacquers. Hape ba na le li-VOC tse phahameng haholo. Li-varnish tsa phetoho ke motsoako oa li-alkyds tse thehiloeng ka oli, urea formaldehyde le melamine. Ba sebelisa motsoako o matla oa asiti joalo ka p-toluene sulfonic acid. Ba na le bophelo ba pitsa ba lihora tse 24 ho isa ho tse 48. Li sebelisoa ka kichineng, thepa ea ka tlung le lisebelisoa tsa thepa ea bolulo. Li-varnish tsa phetoho li na le thepa e ntle ka ho fetisisa ea mefuta e meraro ea litlolo tse entsoeng ka solvent tse atisang ho sebelisoa bakeng sa lehong la indasteri. Li na le li-VOC tse phahameng haholo le tlhahiso ea formaldehyde.
Metsi-based self-crosslinking acrylic emulsions le polyurethane dispersions e ka ba mekhoa e meng e babatsehang ho lihlahisoa tse thehiloeng ho solvent bakeng sa lisebelisoa tsa lehong la indasteri. Li-emulsions tsa Acrylic li fana ka lik'hemik'hale tse ntle haholo le li thibela ho hanyetsa, litekanyetso tse phahameng tsa ho thatafala, ho tšoarella ho ikhethang le boemo ba leholimo, le ho khomarela ho ntlafetseng libakeng tse se nang porous. Li na le linako tse omileng ka potlako, tse nolofalletsang khabinete, thepa ea ka tlung kapa moetsi oa lihlahisoa tsa moaho ho sebetsana le likarolo kapele kamora kopo. Li-PUD li fana ka khanyetso e ntle ea abrasion, ho tenyetseha le maemo, le khanyetso le ho hanyetsa mar. Ke balekane ba molemo ba ho kopanya le li-emulsions tsa acrylic ho ntlafatsa thepa ea mochini. Ka bobeli li-emulsion tsa acrylic le li-PUD li ka sebetsana le lik'hemik'hale tse kopanyang tse kang polyisocyanates, polyaziridine kapa carbodiimides ho etsa liaparo tsa 2K tse nang le thepa e ntlafetseng.
Liaparo tsa metsi tse phekolehang ka UV li fetohile khetho e tsebahalang bakeng sa lits'ebetso tsa lehong la indasteri. Khabinete ea kichine le baetsi ba thepa ea ka tlung ba khetha liaparo tsena hobane li na le khanyetso e ntle haholo le thepa ea mochini, lisebelisoa tse ntle haholo tsa ts'ebeliso le likhase tse tlase haholo tsa solvent. Liaparo tsa WB UV li na le li-block resistance hang hang ka mor'a hore li phekolehe, tse lumellang likarolo tse koahetsoeng hore li kenngoe, li pakeloe le ho romelloa hang-hang moleng oa tlhahiso ntle le nako ea ho lula bakeng sa nts'etsopele ea boima. Khatelo-pele ea ho thatafala ha WB UV e koahela e tsoteha ebile e etsahala ka metsotsoana. Khanyetso ea lik'hemik'hale le matheba ea lirafshoa tsa WB UV e phahametse ea livarnish tsa phetoho tse thehiloeng ho solvent.
Liaparo tsa WB UV li na le melemo e mengata ea tlhaho. Le hoja 100% -li-oligomers tse tiileng tsa UV hangata li na le viscosity 'me li tlameha ho hlapolloa ka li-diluent tse sebetsang, li-WB UV PUDs li na le viscosity e tlaase,' me viscosity e ka lokisoa ka mekhoa ea setso ea WB rheology modifiers. Li-PUD tsa WB UV li na le boima bo phahameng ba limolek'hule 'me ha li hahe boima ba limolek'hule kaha li phekola ka mokhoa o makatsang joalo ka 100% e tiileng ea lirafshoa tsa UV. Hobane li na le ho fokotseha ho fokolang kapa ha li na letho ha li ntse li phekola, li-PUD tsa WB UV li na le mamarelo a matle ho li-substrates tse ngata. Ho benya ha liphahlo tsena ho laoloa habonolo ka li-agent tsa setso tsa matting. Li-polymer tsena li ka ba thata haholo empa hape li tenyetseha ka mokhoa o fetisisang, li etsa hore e be batho ba loketseng ho roala lehong la kantle.
Nako ea poso: Mar-07-2024
