I-synthesis Ye-UV Yelapheka Yamanzi Ye-Polyurethane Acrylate Coatings Isithombe Esifakiwe

I-Synthesis Of UV I-UV Curable Waterborne Polyurethane Acrylate Coatings

Incazelo emfushane:

I-Uv-wpua coating yenziwe nge-oligomer, i-photoinitiator, i-diluent esebenzayo, njll. I-Oligomer iyisakhi esibaluleke kakhulu ekuhlanganisweni kwe-uv-wpua.Isakhiwo sawo sinquma izici eziyisisekelo zefilimu yokwelapha ye-UV, njengokuqina, ukuguquguquka, ukumelana nokugqoka, ukumelana kwamanzi nokumelana nokugqwala.I-Photoinitiator iyingxenye ebalulekile yesistimu yokwelapha ye-UV, edlala indima ebalulekile ebucayi benqubo yokwelapha ye-UV futhi iphinde ibe nomthelela ekusebenzeni kokugcina kwefilimu eselashiwe.Ukugcoba kwe-Uv-wpua kusebenzisa amanzi njenge-diluent esebenzayo, okunciphisa kakhulu ukusetshenziswa kwezincibilikisi eziphilayo.

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Imininingwane Yomkhiqizo

Omaka bomkhiqizo

I-Synthesis Of Waterborne Polyurethane Acrylate

I-oligomer ekugqokeni kwe-uv-wpua yi-wpua, okuyingxenye eyinhloko yokugqoka.I-Wpua ivamise ukwakhiwa ngokusabela kwe-polyisocyanate, i-diol ne-hydroxyl acrylate.Ama-Isocyanate ahlanganisa ama-isocyanate anuka kamnandi, ama-aliphatic isocyanate nama-alicyclic isocyanates, athinta ukuqina, ukumelana nesimo sezulu kanye nokumelana nokuphuzi kwe-wpua.Ama-Diol ikakhulukazi ahlanganisa ama-polyether diol nama-polyester diol, athinta amandla aqinile, ukuthamba, ukumelana nokushisa kanye nokumelana ne-hydrolysis ye-wpua.
Iqembu - le-NCO ku-polyisocyanate lihlangana neqembu le-hydroxyl le-diol ukwenza i-oligomer enamaqembu e-isocyanate kuzo zombili iziphetho.2. I-2,2-dihydroxymethylpropionic acid (i-DMPA) isetshenziswa njenge-diol ukwethula amaqembu e-hydrophilic ku-oligomer, futhi i-1,4-butanediol (BDO) yengezwe ukunwetshwa kwamaketanga;3. I-Hydroxyethyl acrylate (HEA) isetshenziselwe ukwethula amaqembu asebenzayo esithombe aqukethe amabhondi angenawo unsaturated okwelapha i-UV.Ngemva kokuqedwa kwezinyathelo ezintathu zokusabela, i-triethanolamine (i-teoa) yengezwa ukuze i-neutralization reaction, futhi ekugcineni amanzi engeziwe ukuze afakwe emulsify ibe yi-lotion.
Ezinye izazi zenze i-uv-wpua ngokusebenza okuhle kakhulu ngokusebenzisa izinto zokwenziwa zokwenziwa njenge-Polyhexylene glycol, isophorone diisocyanate, iPETA, ne-dimethylbutyric acid (DMBA).Izinhlobo ezintathu ze-wpua zahlanganiswa kusukela ku-polyacrylate elungisiwe neqembu le-carboxyl ku-side chain, i-polyether polyol, i-isophorone diisocyanate ne-hydroxyethyl acrylate.Ngemuva kophenyo olunzulu lokuhlolwa komzimba nokuhlolwa kwesicelo, kubhekwa ukuthi ukusebenza okuphelele kwe-polyether wpua kungcono.Kusetshenziswa i-toluene diisocyanate, i-polyhexanediol, i-2,2-dihydroxymethylpropionic acid kanye ne-hydroxyethyl methacrylate njengezinto zokusetshenziswa, i-prepolymer yaqala ukuhlanganiswa, kwase kwengezwa i-triethylamine njenge-ejenti engathathi hlangothi, futhi amanzi asetshenziswa njenge-chain extender ukuze ahlakazeke emanzini ukuze enze i-wpua ezinzile.