UV yog ib hom txheej uas tuaj yeem kho tau sai rau hauv zaj duab xis hauv ob peb feeb hauv qab irradiation ntawm ultraviolet (UV).UV txheej yog txiav dov thiab txau rau ntawm rooj tog zaum los ntawm cov tshuab thiab khoom siv.Nyob rau hauv lub irradiation ntawm ultraviolet lub teeb, nws txhawb lub decomposition ntawm pib, generates dawb radicals, triggers resin cov tshuaj tiv thaiv, thiab instantly solidifies rau hauv ib zaj duab xis yam tsis muaj hnyav volatilization.Yog li ntawd, nws yog ntau npaum, ntsuab thiab ib puag ncig tus phooj ywg.
Raws li cov qauv ntawm hydration, Waterborne UV txheej kuj tau ua tiav hauv cov ntoo, yas, luam ntawv, tshuaj txhua hnub thiab lwm yam kev lag luam vim lawv cov phooj ywg ib puag ncig thiab kev tsim kho tus phooj ywg.Cov khoom siv raw ua lub luag haujlwm tseem ceeb.Lub nruam innovation ntawm kev ua tau zoo, cov yam ntxwv thiab daim ntawv thov kev daws teeb meem ntawm waterborne coatings txhawb cov txheej txheem ntawm resin hydration.
1 epoxy acrylate / polyurethane acrylate composite system
Photosensitive oligomer yog qhov tseem ceeb ntawm UV kho resin, uas txiav txim siab cov yam ntxwv ntawm cov khoom kho tau zoo.Txhua yam ntawm matrix resins muaj lawv cov txiaj ntsig tsis tuaj yeem hloov pauv, tab sis lawv yuav tsis muaj qhov tsis xws luag.Piv txwv li, epoxy resin raws li curing zaj duab xis muaj siab hardness, zoo adhesion, siab gloss thiab zoo heev tshuaj tiv thaiv, tab sis nws muaj qhov tsis zoo ntawm cov tsis yooj yim.Lwm qhov piv txwv yog tias polyurethane raws li resin muaj cov khoom zoo xws li hnav tsis kam thiab khawb, tab sis nws cov huab cua tiv thaiv tsis txaus.Cov kws tshawb fawb siv kev sib xyaw lossis kev sib xyaw ua ke los ua ke ob qho tib si, txhawm rau txhawm rau ua kom tsis muaj peev xwm ntawm ib qho resin thiab txhim kho cov txheej txheem nrog ob qho tib si zoo heev.
2 dendritic los yog hyperbranched system
Waterborne UV curable dendrimers los yog hyperbranched oligomers yog ib yam tshiab ntawm polymers nrog spherical los yog dendritic qauv thiab tsis muaj entanglement ntawm molecular chains.Tsis tas li ntawd, cov qauv polymer uas muaj ntau yam muaj ntau cov pab pawg kawg.Cov pab pawg ua haujlwm kawg no tau hloov kho los kho cov khoom ntawm cov khoom siv polymer thiab siv rau qee thaj chaw.Piv nrog cov linear polymers nrog tib qhov hnyav molecular, hyperbranched oligomers muaj cov khoom zoo xws li cov ntsiab lus melting tsawg, tsawg viscosity, yooj yim dissolution thiab siab reactivity.Lawv yog cov khoom siv zoo tshaj plaws rau cov dej ua kom lub teeb curing matrix resins.Cov dej-raws li hyperbranched polyester muaj li ntawm polyhydroxy functional aliphatic polyester li cov tub ntxhais yuav txo tau cov dej dilution thiab qhia ib tug zoo viscosity txo cov nyhuv vim nws cov dej zoo solubility thiab tsawg viscosity.
3 epoxy soybean roj acrylate
Epoxy soybean roj muaj qhov zoo ntawm tus nqi qis, kev tiv thaiv ib puag ncig, cov saw ntev molecular thiab nruab nrab crosslinking ceev.Nws tuaj yeem txhim kho qhov yooj yim thiab adhesion ntawm txheej.Nyob rau hauv xyoo tas los no, nws tau dhau los ua qhov kev tshawb fawb hotspot nyob rau hauv lub tshav pob ntawm coatings nyob rau hauv tsev thiab txawv teb chaws.Kev ua tau zoo tau ua tiav hauv epoxy soybean roj acrylate thiab hloov kho epoxy soybean roj acrylate UV dawb radical curing txheej hauv Suav teb.Lub tuam txhab Cub hauv Tebchaws Meskas tau ua cov khoom lag luam, xws li ebercy860.Cov txheej txheem synthesis ntawm epoxy soybean roj acrylate feem ntau yog semi ester hloov kho txoj kev, uas yog esterificate epoxy soybean roj nrog acrylic acid.
Post lub sij hawm: May-25-2022