xov xwm

Tam sim no tib neeg muaj ntau txoj kev xaiv hauv kev saib xyuas daim tawv nqaij, tsuas yog cov khoom xyaw tshuaj pleev thaiv hnub muaj ntau dua 10 hom, tab sis qee cov khoom saib xyuas daim tawv nqaij zoo li kev saib xyuas daim tawv nqaij ntau dua yuav ua rau peb daim tawv nqaij mob. Yog li peb yuav xaiv cov khoom saib xyuas daim tawv nqaij kom raug rau peb daim tawv nqaij li cas? Cia peb tham txog benzophenone-4, ib qho khoom xyaw tseem ceeb hauv cov khoom saib xyuas daim tawv nqaij.

benzophenone-4 yog dab tsi?

Benzophenone-4yog ib qho benzophenone compound, hu ua BP-4, cov mis tshuaj C14H12O6S. Nws yog ib qho hmoov dawb lossis daj daj ntawm chav tsev kub thiab tuaj yeem nqus tau lub teeb UV ntawm 285 txog 325 Im. Ua ib qho kev nqus ultraviolet dav dav, BP-4 muaj qhov zoo ntawm kev nqus siab, tsis muaj tshuaj lom, tsis ua rau teratogenic, lub teeb zoo thiab thermal stability, thiab lwm yam., UV absorber BP-4 tuaj yeem nqus tau UV-A thiab UV-B tib lub sijhawm, yog chav kawm I tshuaj pleev thaiv hnub pom zoo los ntawm Tebchaws Meskas FDA, Tebchaws Meskas thiab cov tebchaws European muaj ntau zaus siv, feem ntau yog siv rau hauv tshuaj pleev thaiv hnub thiab lwm yam tshuaj pleev thaiv hnub.

Cov tshuaj nqus dej Uv BP-4tsis muaj tshuaj lom, tsis kub hnyiab, tsis tawg, yooj yim nqus cov dej noo hauv huab cua, nws muaj kev ua tau zoo heev ntawm cov kua qaub UV nqus dej, tuaj yeem nqus tau lub teeb UV. Nws yog siv dav ua lub zog nqus ultraviolet rau cov txheej polymer dej thiab xim ntshav kom tiv thaiv kev oxidation photocatalytic ntawm cov txheej polymer dej thiab xim ntshav; Nws yog ib qho tshuaj pleev thaiv hnub zoo rau cov tshuaj pleev ib ce thiab lub zog nqus UV los txhim kho kev tiv thaiv huab cua ntawm cov ntaub wool.

Benzophenone siv dav hauv cov khoom siv hauv tsev xws li tsom iav dub, ntim khoom noj, ntxhua khaub ncaws thiab cov khoom siv ntxuav kom tiv thaiv kev raug UV. Nws tuaj yeem ua rau dej haus tsis huv thiab txav mus los ntawm cov ntim khoom noj mus rau cov khoom noj. Benzophenone siv rau hauv qee cov kua nplaum ntim khoom noj thiab tej zaum yuav txav mus rau cov khoom noj. Benzophenone tshwm sim ntuj hauv qee yam khoom noj (xws li txiv hmab cawv thiab txiv hmab Muscat) thiab ntxiv rau lwm tus ua tus neeg sawv cev tsw qab.

Hauv cov khoom siv tu tus kheej, benzophenone siv los ua cov tshuaj tsw qab lossis tiv thaiv cov khoom xws li xab npum kom tsis txhob poob lawv cov tshuaj tsw qab thiab xim hauv qab lub teeb ultraviolet. Benzophenone derivatives xws li BP2 thiab oxybenzone (BP3) thiabbenzophenone-4 (BP-4)siv rau hauv cov tshuaj pleev thaiv hnub. Oxybenzone siv ua cov tshuaj nqus thiab stabilizer ultraviolet, tshwj xeeb tshaj yog hauv cov yas thiab cov tshuaj pleev thaiv hnub. Benzophenone thiab oxybenzone kuj tseem siv rau hauv cov xim rau tes thiab tshuaj pleev di ncauj.

Benzophenone-4 siv rau dab tsi hauv kev saib xyuas tawv nqaij?

Cov tshuaj BP-4 uas nqus tau Uv muaj qhov zoo ntawm lub teeb zoo thiab kub ruaj khov, thiab siv dav hauv tshuaj pleev thaiv hnub, tshuaj pleev, zib ntab, tshuaj pleev, roj thiab lwm yam tshuaj pleev thaiv hnub. Tshwj xeeb tshaj yog rau tshuaj pleev thaiv hnub, tshuaj pleev, pleev xim, qhov ntau npaum li cas yog 0.1-0.5%. Qhov ntau npaum li cas yog 0.2-1.5%.

Cov khoom nqus dej UvBP-4yooj yim yaj hauv dej, thiab cov kua dej yog acidic, yog li nws yuav tsum tau neutralized thaum siv. Cov kua PH ntau dua 9 yuav ua rau qhov nqus dej wavelength kom nqaim, qhov tseem ceeb ntawm kev siv tshuaj pleev thaiv hnub txhua hnub thiab lwm yam khoom siv saib xyuas tawv nqaij kom tiv thaiv kev laus ntawm daim tawv nqaij los ntawm lub teeb ultraviolet.

Benzophenone-4 siv rau dab tsi hauv kev saib xyuas tawv nqaij?