Taupānga
Te whakahiatotanga o nga paninga kiriaku polyurethane kua taea te rongoa i te UV
Te Whakakotahitanga o te Waikura Polyurethane Acrylate
Ko te oligomer i roto i te paninga uv-wpua ko te wpua, koinei te waahanga nui o te paninga.I te nuinga o te wa ka hangaia te Wpua ma te tauhohenga o te polyisocyanate, te diol me te hydroxyl acrylate.Kei roto i nga Isocyanates he isocyanates kakara, isocyanates aliphatic me isocyanates alicyclic, e pa ana ki te rigidity, parenga huarere me te kowhai o te wpua.Kei roto i nga Diols te polyether diols me te polyester diols, e pa ana ki te kaha tensile, te ngawari, te parenga wera me te parenga wai o te wpua.
Ko te roopu - NCO i roto i te polyisocyanate ka tauhohe ki te roopu hydroxyl o te diol ki te hanga i te oligomer me nga roopu isocyanate i nga pito e rua.2. Ko te 2,2-dihydroxymethylpropionic acid (DMPA) ka whakamahia hei diol ki te whakauru i nga roopu hydrophilic ki roto i te oligomer, ka taapirihia te 1,4-butanediol (BDO) mo te toronga mekameka;3. I whakamahia te Hydroxyethyl acrylate (HEA) ki te whakauru i nga roopu hohe whakaahua kei roto i nga here rua haunga kore mo te whakaora UV.Ka oti te tauhohenga e toru-taahiraa, ka tapirihia te triethanolamine (teoa) mo te tauhohenga whakaheke, ka mutu ka taapirihia te wai hei whakaehunga ki te wai.
Ko etahi atu tohunga kua whakahiatohia te uv-wpua me te tino pai o te mahi ma te whakamahi i nga rauemi mata waihanga penei i te Polyhexylene glycol, isophorone diisocyanate, PETA, me te waikawa dimethylbutyric (DMBA).E toru nga momo wpua i whakahiatohia mai i te polyacrylate kua rite me te roopu carboxyl i te mekameka taha, polyether polyol, isophorone diisocyanate me te hydroxyethyl acrylate.Whai muri i te tirotiro matawhānui o te whakamatautau tinana me te whakamatautau tono, ka whakaarohia he pai ake te mahi matawhānui o te polyether wpua.Ma te whakamahi i te toluene diisocyanate, te polyhexanediol, te waikawa 2,2-dihydroxymethylpropionic me te hydroxyethyl methacrylate hei rauemi mata, ka whakahiato tuatahi te prepolymer, katahi ka tapirihia te triethylamine hei kaihoko whakakore, ka whakamahia te wai hei whakaroa mekameka ki te marara i roto i te wai hei hanga wai wpua pumau.
