Epoxy UV e phekola resin e sebelisoa haholo masimong a ho lahla motlakase, ho koaela ho thibela kutu, ho tlamaha ka tšepe joalo-joalo ka lebaka la matla a eona a holimo a tlamahano, bokaholimo bo pharaletseng, shrinkage e tlase, botsitso bo botle, ts'ebetso e ntle ea motlakase, matla a phahameng a mochini le matla a holimo. tshebetso e ntle.Lilemong tsa morao tjena, epoxy UV e phekola resin joalo ka indasteri e atlehile.
Leha ho le joalo, hajoale, khanyetso ea boemo ba leholimo ea lihlahisoa tse ngata tsa epoxy e batla e fokola, haholo-holo ha ho etsoa sekhomaretsi sa epoxy, sekhomaretsi sa lipitsa tse etelletsoeng pele, sekhomaretsi sa mabenyane a epoxy UV, jj. litlhoko tsa ts'ebetso ea anti yellowing ea sistimi ea epoxy.
Ho na le lintlha tse ngata tse bakang yellowing ea lihlahisoa tsa epoxy: 1. Bisphenol sebopeho sa monko o monate oa epoxy UV e phekola resin e bonolo ho oxidize ho hlahisa carbonyl ho theha sehlopha se mosehla;2. Karolo e sa lefelloeng ea amine ea amine e phekolang e entsoe ka polymer ka ho toba ka epoxy UV e phekolang resin, e leng se bakang ho phahama ha mocheso sebakeng le ho potlakisa mosehla;3. Li-accelerator tse phahameng tsa amine le li-accelerator tsa nonylphenol li bonolo ho fetola 'mala tlas'a oksijene e chesang le mahlaseli a UV;4. Haeba mocheso o phahame haholo nakong ea karabelo, litšila tse setseng le li-catalyst tsa tšepe tsamaisong li tla etsa hore ho be le mosehla.
Tharollo e sebetsang ke ho eketsa antioxidant le ultraviolet absorber, e ka thibelang ka katleho le ho liehisa mosehla.Leha ho le joalo, ho na le mefuta e mengata ea li-antioxidants, 'me ho khetha lihlahisoa tse loketseng ho hloka tšehetso e itseng ea tekheniki le ho bokella boiphihlelo.
Sehlopha sa li-antioxidants: e 'ngoe ke eona e ka sehloohong ea antioxidant: tšoara li-radicals tsa mahala tsa peroxide, haholo-holo tse sitisang phenol antioxidants;E 'ngoe ke e thusang ea antioxidant: e senya hydroperoxides, haholo-holo phosphite ester le thioesters.Ka kakaretso, li-antioxidants tse fapaneng li khothaletsoa ho latela ts'ebetso ea tlhahiso, lisebelisoa tse tala, li-solvents, li-additives le li-filler tsa bahlahisi ba fapaneng, e leng mohato oa mosehla le tekanyo ea mosehla.
Leseli la ultraviolet hape ke sesosa sa bohlokoa se bakang oxidation yellowing system ea epoxy, haholo-holo ho tsoa mahlaseli a letsatsi.Ka hona, haholo-holo bakeng sa bareki bao lihlahisoa tsa bona li lokelang ho sebelisoa ka ntle, re tla khothaletsa ho eketsa palo e itseng ea mahlaseli a UV ho lihlahisoa, tse ka khonang ho monya UV ka katleho le ho liehisa mosehla.Ho feta moo, ts'ebeliso ea ultraviolet le antioxidant e ka ba le phello e ts'oanang, ka phello ea hore 1 le 1 e kholo ho feta 2.
Ha e le hantle, tšebeliso ea li-antioxidants le li-absorber tsa ultraviolet li ke ke tsa rarolla bothata ba ho ba mosehla, empa ka nako e itseng le nako, e ka thibela ka katleho ho oxidation yellowing ea lihlahisoa, ho boloka 'mala oa metsi oa lihlahisoa pepeneneng le ho ntlafatsa boleng ba lihlahisoa. .
Nako ea poso: May-09-2022