Waterborne (WB) UV chemistry yakaratidza kukura kwakakura mukati memisika yemapuranga emukati nekuti tekinoroji inopa kuita kwakanakisa, kuderera kwezvinonyungudutsa uye kuwedzera kugadzirwa kwehunyanzvi. UV majeti masisitimu anopa mushandisi wekupedzisira mabhenefiti emhando yepamusoro yekemikari uye kukwenya kuramba, yakanakisa block resistance, yakaderera maVOCs uye diki yemidziyo tsoka ine nzvimbo shoma yekuchengetera inodiwa. Aya masisitimu ane zvivakwa zvinoenzanisa zvakanaka neaviri-chikamu urethane masisitimu pasina matambudziko ehazardous crosslinkers uye kunetsa kwehupenyu hwehari. Iyo yese system inodhura zvakanyanya nekuda kwekuwedzera kumhanya kwekugadzira uye kuderera kwesimba mutengo. Aya mabhenefiti mamwe chete anogona kubatsira kune fekitori-yakaiswa kunze maapplication anosanganisira hwindo nemadhoo mafuremu, siding uye mamwe millwork. Izvi zvikamu zvemusika zvinoshandisa acrylic emulsions uye polyurethane dispersions nekuti zvine gloss yakanaka uye kuchengetedza kwemavara, uye anoratidza kusimba kwepamusoro. Muchidzidzo ichi, polyurethane-acrylic resins ine UV mashandiro akaongororwa zvinoenderana neindasitiri maratidziro emukati uye ekunze maindasitiri ehuni.
Mhando nhatu dzeakanyungudika-based coatings anowanzoshandiswa mumaindasitiri ehuni application. Nitrocellulose lacquer inowanzoita yakaderera-solid musanganiswa we nitrocellulose nemafuta kana mafuta-based alkyds. Aya mabhanhire ari kukurumidza kuoma uye ane yakakwirira gloss kugona. Iwo anowanzo shandiswa mukugara fenicha application. Vane dambudziko reyero nekufamba kwenguva uye vanogona kuita brittle. Ivo zvakare vane urombo makemikari kuramba. Nitrocellulose lacquers ane maVOC akakwira zvakanyanya, kazhinji ari pa500 g/L kana kupfuura. Pre-catalyzed lacquers yakasanganiswa nitrocellulose, mafuta kana mafuta-based alkyds, plasticizers uye urea-formaldehyde. Vanoshandisa isina simba acid catalyst yakadai sebutyl acid phosphate. Aya mabhanhire ane hupenyu hwesherufu hweinenge mwedzi mina. Izvo zvinoshandiswa muhofisi, masangano uye fenicha yekugara. Pre-catalyzed lacquers ane nani makemikari kuramba kupfuura nitrocellulose lacquers. Ivo zvakare vane maVOC akakwira kwazvo. Shanduko varnishes masanganiswa emafuta-based alkyds, urea formaldehyde uye melamine. Vanoshandisa yakasimba acid catalyst yakadai se p-toluene sulfonic acid. Vane hupenyu hwehari ye24 kusvika ku48 hrs. Iwo anoshandiswa mukicheni kabati, fenicha yehofisi uye yekugara fenicha application. Shanduko mavarnish ane akanakisa zvimiro zvemhando nhatu dze solvent-based coatings anowanzo shandiswa matanda eindasitiri. Ivo vane maVOC akakwira kwazvo uye formaldehyde emissions.
Mvura-based self-crosslinking acrylic emulsions uye polyurethane dispersions inogona kuva yakanakisa dzimwe nzira kune zvinonyungudutsa-based zvigadzirwa zvemaindasitiri ehuni application. Acrylic emulsions inopa yakanyanya kunaka kemikari uye block resistance, yepamusoro kuomarara kukosha, kusimba kwakamira uye mamiriro ekunze, uye yakagadziridzwa kunamatira kune isina-porous nzvimbo. Ivo vane kukurumidza kuoma nguva, zvichiita kuti kabhineti, fenicha kana mugadziri wezvigadzirwa zvekuvaka kubata zvikamu munguva pfupi mushure mekushandisa. PUDs inopa yakanakisa abrasion kuramba, kuchinjika, uye kukwenya uye mar kuramba. Ivo vakanaka vanosanganisa vadyidzani ne acrylic emulsions kuvandudza michina zvivakwa. Ose ari maviri acrylic emulsions uye PUDs anogona kuita ne crosslinking chemistries senge polyisocyanates, polyaziridine kana carbodiimides kuti aumbe 2K coatings ane yakagadziridzwa zvivakwa.
Mvura inotakurwa neUV-inorapika yave sarudzo dzakakurumbira dzemaindasitiri ehuni maapplication. Kicheni kabati nevagadziri vefenicha vanosarudza machira aya nekuti ane akanakisa kupikisa uye michina zvivakwa, yakanakisa application zvivakwa uye yakaderera kwazvo solvent emissions. WB UV machira ane yakanakisa block resistance pakarepo mushure mekurapwa, iyo inobvumira kuti zvikamu zvakavharwa zviturikirwe, kurongedza uye kutumirwa ipapo kubva pamutsetse wekugadzira pasina nguva yekugara yekuvandudza kuoma. Iko kukura kwekuoma kweWB UV coating kunoshamisa uye kunoitika mumasekonzi. Iko kemikari uye kupikisa kwemavara eWB UV majasi epamusoro kune ayo e solvent-based conversion varnishes.
WB UV majasi ane akawanda mazvake mabhenefiti. Nepo 100%-yakasimba UV oligomers anowanzo kukwirira mu viscosity uye anofanirwa kuderedzwa neanogadzirisa diluent, maWB UV PUDs akaderera mu viscosity, uye viscosity inogona kugadziridzwa neyakajairwa WB rheology modifiers. MaWB UV PUDs ane huremu hwekutanga hwemamorekuru uye haavake huremu hwemamorekuru sezvo achirapa zvinoshamisa se100% yakasimba UV mabhanhire. Nekuti ivo vane kushoma kana kusave nekuderera pavanenge vachirapa, WB UV PUDs ine yakanakisa kunamatira kune akawanda substrates. Kubwinya kwezvipfeko izvi kunodzorwa nyore nyore nevechinyakare matting agents. Aya mapolymer anogona kuoma zvakanyanya asi zvakare anochinjika zvakanyanya, achivaita vanokodzera kukwikwidza kwekunze kwehuni.
Nguva yekutumira: Mar-07-2024
