Synthesis Of UV Curable Waterborne Polyurethane Acrylate Coatings Afihan Aworan

Atopọ ti UV Curable Waterborne Polyurethane Acrylate Coatings

Apejuwe kukuru:

Uv-wpua ti a bo jẹ ti oligomer, photoinitiator, diluent ti nṣiṣe lọwọ, ati bẹbẹ lọ.Eto rẹ ṣe ipinnu awọn ohun-ini ipilẹ ti fiimu imularada UV, gẹgẹ bi lile, irọrun, resistance wọ, resistance omi ati resistance ipata.Photoinitiator jẹ ẹya pataki paati ti UV curing eto, eyi ti yoo kan pataki ipa ni ifamọ ti UV curing ilana ati ki o tun ni ipa lori awọn ik iṣẹ-ṣiṣe ti si bojuto fiimu.Uv-wpua ti a bo nlo omi bi diluent ti nṣiṣe lọwọ, eyiti o dinku pupọ lilo awọn ohun-elo Organic.

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Akopọ Of Waterborne Polyurethane Acrylate

Awọn oligomer ni uv-wpua ti a bo ni wpua, eyi ti o jẹ akọkọ apa ti awọn ti a bo.Wpua ti wa ni ipilẹṣẹ nipasẹ iṣesi ti polyisocyanate, diol ati hydroxyl acrylate.Isocyanates pẹlu aromatic isocyanates, aliphatic isocyanates ati alicyclic isocyanates, eyi ti o ni ipa lori rigidity, oju ojo resistance ati yellowing resistance ti wpua.Awọn diol ni akọkọ pẹlu awọn diol polyether ati awọn diol polyester, eyiti o ni ipa lori agbara fifẹ, rirọ, resistance ooru ati resistance hydrolysis ti wpua.
Ẹgbẹ NCO ni polyisocyanate ṣe atunṣe pẹlu ẹgbẹ hydroxyl ti diol lati ṣe oligomer pẹlu awọn ẹgbẹ isocyanate ni awọn opin mejeeji.2.2,2-dihydroxymethylpropionic acid (DMPA) ni a lo bi diol lati ṣafihan awọn ẹgbẹ hydrophilic sinu oligomer, ati 1,4-butanediol (BDO) ti wa ni afikun fun itẹsiwaju pq;3. Hydroxyethyl acrylate (HEA) ni a lo lati ṣafihan awọn ẹgbẹ ti nṣiṣe lọwọ fọto ti o ni awọn iwe ifowopamosi ilọpo meji ti ko ni itọrẹ fun imularada UV.Lẹhin ti iṣesi-igbesẹ mẹta ti pari, triethanolamine (teoa) ti wa ni afikun fun iṣesi yomi, ati nikẹhin a fi omi kun lati mu emulsify sinu ipara.
Awọn ọjọgbọn miiran ti ṣajọpọ uv-wpua pẹlu iṣẹ ṣiṣe to dara julọ nipa lilo awọn ohun elo aise sintetiki gẹgẹbi Polyhexylene glycol, isophorone diisocyanate, PETA, ati dimethylbutyric acid (DMBA).Awọn iru wpua mẹta ni a ṣepọ lati inu polyacrylate ti a pese sile pẹlu ẹgbẹ carboxyl ni ẹwọn ẹgbẹ, polyether polyol, isophorone diisocyanate ati hydroxyethyl acrylate.Lẹhin iwadii okeerẹ ti idanwo ti ara ati idanwo ohun elo, a gba pe iṣẹ ṣiṣe okeerẹ ti polyether wpua dara julọ.Lilo toluene diisocyanate, polyhexanediol, 2,2-dihydroxymethylpropionic acid ati hydroxyethyl methacrylate bi awọn ohun elo aise, prepolymer ti kọkọ ṣajọpọ, lẹhinna triethylamine ti wa ni afikun bi aṣoju yomi, ati omi ti a lo bi pq extender lati tuka ninu omi lati dagba idurosinsin wpua ipara.