Tam sim no, qhov zoo tshaj plaws UV absorbers / lub teeb stabilizers feem ntau yog cov khoom sib xyaw, tshwj xeeb tshaj yog nrog salicylates, benzophenones, benzotriazoles, hloov acrylonitriles, triazines thiab hindered amines. Nws tuaj yeem ua tiav cov txiaj ntsig zoo dua li ib qho UV absorber. Daim ntawv thov teb ntawm UV absorbers: polymers (yas, thiab lwm yam), coatings (automotive spray paint, building finishing), printing inks, post-treatment of dyed/printed textiles, sunscreen cosmetic.
Txij li lub hnub lub rays muaj ib tug loj npaum li cas ntawm ultraviolet lub teeb teeb meem rau cov xim, nws wavelength yog hais txog 290-460 nanometers, cov teeb meem ultraviolet teeb los ntawm cov tshuaj redox tshuaj (Redox cov tshuaj tiv thaiv), kom cov xim molecules thaum kawg decompose thiab fade. Ultraviolet absorbers tiv thaiv Muaj ob qho tib si lub cev thiab tshuaj txoj kev los ntawm qhov teeb meem ultraviolet teeb tuaj yeem rhuav tshem cov xim.
Ntawm no peb tsuas yog luv luv qhia txog cov txheej txheem tshuaj, uas yog, kev siv ultraviolet absorbers los tiv thaiv cov khoom tiv thaiv zoo, lossis ua rau lawv tsis muaj zog rau cov xim.
① tuaj yeem nqus tau ultraviolet lub teeb (tshwj xeeb tshaj yog lub wavelength ntawm 290-400nm);
② Zoo thermal stability, txawm nyob rau hauv kev ua, nws yuav tsis hloov vim cua sov, thiab lub thermal volatility yog me me;
③ Kev ruaj ntseg tshuaj zoo, tsis muaj kev cuam tshuam nrog cov khoom siv hauv cov khoom;
④ Zoo miscibility, tuaj yeem sib npaug ntawm cov khoom, tsis muaj Frost, tsis muaj seepage;
⑤ Lub photochemical stability ntawm lub absorber nws tus kheej yog zoo, tsis decomposition, tsis muaj discoloration;
⑥ Tsis muaj xim, tsis muaj tshuaj lom, tsw ntxhiab;
⑦ ntub dej tsis kam;
⑧ pheej yig thiab yooj yim kom tau txais;
⑨. Insoluble, los yog hardly soluble nyob rau hauv dej.
UV absorbers tuaj yeem muab faib ua pawg hauv qab no raws li lawv cov qauv tshuaj: salicylates, benzophenones, benzotriazoles, hloov acrylonitriles, triazines, thiab hindered amines.
