Cov phenols hindered nrog tert-butyl (X = tert-butyl) thiab methyl (R = methyl CH3) ntawm o-txoj haujlwm ntawm pawg phenolic hydroxyl hindered tuaj yeem ua rau lub cev tsis muaj zog ntawm cov pab pawg phenolic hydroxyl hindered rau qee qib, thiab ua kom nrawm nrawm ntawm cov tshuaj tiv thaiv kab mob antioxidant, yog li ua tus qauv tshiab ntawm cov tshuaj tiv thaiv kab mob ua si ua qhov tsis xav tau. Cov qauv tshiab no ntawm kev tiv thaiv phenols antioxidant hu ua asymmetric hindered phenols antioxidant.
Asymmetric cuam tshuam cov qauv phenolic nrog pawg tert-butyl thiab pab pawg methyl ntawm hydroxyl ortho-txoj haujlwm yog txaus los tiv thaiv nws tus kheej. Asymmetric hindered phenolic antioxidant, nrog 2 - methyl - 6 - tertiary butyl phenol raws li lub cev pob txha, tsis tsuas yog muaj cov yam ntxwv tshwj xeeb ntawm hindered phenolic antioxidants, tab sis kuj koom tes nrog cov tshuaj tiv thaiv kab mob ruaj khov thiab tiv taus kom ntxoov ntxoo. Yog li nws muaj qhov ua tau zoo tshaj qhov ua tau zoo ib yam ntawm cov tshuaj phenol hindered, thiab tsim nyog rau daim ntawv thov thermal oxidation.
AN245, AN1790 (zoo li AN2777) thiab AO80 yog peb qhov feem ntau asymmetric hindered phenols antioxidants, ntawm uas AN245 yog qhov dav siv nrog tus nqi qis.
AN 245 tshwj xeeb tshaj yog tsim rau stereobstructing phenolic antioxidants ntawm cov organic polymers. Raws li cov tshuaj tiv thaiv kab mob tiv thaiv kab mob, nws tau siv rau hauv kev ua haujlwm thiab ua kom lub sijhawm ntev thermal ruaj khov ntawm styrene polymers xws li HIPS, MBS thiab ABS, cov yas yas xws li POM thiab PA thiab polyurethane. Nws kuj tseem yog cov saw txuas tau zoo hauv PVC txheej txheem polymerization. Cov khoom no tsis muaj kev cuam tshuam rau cov tshuaj tiv thaiv polymer, siv rau qhov cuam tshuam loj polystyrene, polyvinyl chloride, tuaj yeem ntxiv rau monomer ua ntej polymerization.
Ntxiv rau qhov xwm txheej muab cov hmoov zoo tib yam, peb tuaj yeem muab 35% cov ntsiab lus ntawm kev sib faib-AN245DW. Tom qab ntau xyoo dhau los ntawm kev paub ntau lawm, cov kua ua kua tsim thiab muab los ntawm peb lub tuam txhab tsis yooj yim rau kev faib tawm, thiab yooj yim rau kev faib tawm ntau dua li hmoov, uas yog cov tshuaj tua kab mob tseem ceeb siv hauv PVC txheej txheem polymerization.
Koj ib txwm tos txais hu rau peb rau kev nug!
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Sijhawm Tshaj Tawm: Sep-13-2021