Ultraviolet absorber yog ib yam ntawm lub teeb stabilizer, uas tuaj yeem nqus cov ultraviolet ib feem ntawm lub hnub ci thiab lub teeb fluorescent yam tsis hloov nws tus kheej. Nyob rau hauv tshav ntuj thiab fluorescence, yas thiab lwm yam ntaub ntawv polymer yuav raug auto-oxidative cov tshuaj tiv thaiv vim qhov kev ua ntawm ultraviolet rays, ua rau polymer degradation thiab deterioration, ua rau tsis zoo tsos thiab txhua yam khoom. Tom qab ntxiv UV absorber, nws tuaj yeem xaiv nqus lub zog siab UV lub teeb thiab tig mus rau hauv lub zog tsis muaj zog rau kev tso tawm lossis noj.
Ntau hom polymers muaj qhov sib txawv wavelengths ntawm ultraviolet rays uas degrade lawv. Txawv ultraviolet absorbers tuaj yeem nqus ultraviolet rays ntawm txawv wavelengths. Thaum siv, ultraviolet absorbers yuav tsum tau xaiv raws li hom polymer.
UV absorbers yuav tsum muaj cov hauv qab no:
① tuaj yeem nqus tau ultraviolet rays (tshwj xeeb tshaj yog ultraviolet rays nrog lub wavelength ntawm 290-400nm)
② Zoo thermal stability, nws yuav tsis hloov vim thaum tshav kub kub ua, thiab thermal volatility yog me me.
③ Zoo tshuaj ruaj khov, tsis muaj kev phiv tshuaj nrog cov khoom siv hauv cov khoom
④ Cov miscibility zoo, tuaj yeem sib npaug ntawm cov khoom, tsis muaj frosting, tsis muaj exudation
⑤ Lub photochemical stability ntawm lub absorber nws tus kheej yog zoo, tsis muaj decomposition, tsis muaj discoloration
⑥ Tsis muaj xim, tsis muaj tshuaj lom, tsis muaj ntxhiab tsw
⑦ Immersion kuj
⑧ pheej yig thiab yooj yim kom tau.
UV absorbers tuaj yeem muab faib ua pawg hauv qab no raws li lawv cov qauv tshuaj: salicylates, benzophenones, benzotriazoles, hloov acrylonitriles, triazines thiab lwm yam.
No.1 salicylate phenyl ester
Cov khoom xyaw: Phenyl phthalate
Khoom thiab Siv: Xim tsis muaj xim crystalline hmoov. Nws muaj ib tug qab ntxiag aromatic tsw (roj ntawm wintergreen). Qhov ceev yog 1.250g / cm3, lub melting point yog 43 degree, thiab boiling point (1.6kPa) yog 173 degree. Soluble nyob rau hauv ether, benzene thiab chloroform, soluble nyob rau hauv ethanol, yuav luag insoluble nyob rau hauv dej thiab glycerol.
Cov khoom no yog UV absorber, siv nyob rau hauv cov khoom yas, tab sis qhov nqus wavelength ntau yog nqaim. Cov khoom siv acrylic pom zoo los ntawm FDA rau kev sib cuag nrog zaub mov.
No.2 UV Absorber UV-P
Cov khoom xyaw: Cov tshuaj tiv thaiv ntawm o-nitroaniline thiab p-cresol
Khoom thiab siv: Cov tsos yog xim tsis muaj xim lossis lub teeb daj muaju. Soluble nyob rau hauv roj av, benzene, acetone thiab lwm yam organic solvents. Solubility nyob rau hauv dej yog heev me me, thiab nws yuav tsis decomposed los ntawm concentrated alkali thiab concentrated acid. Nws tuaj yeem ionize nrog cov hlau hnyav los ua cov ntsev. Nws tuaj yeem nqus tau ultraviolet rays nrog wavelengths ntawm 270 txog 280 nm. Melting point 130 ~ 131 degree.
Cov khoom no tsuas yog siv hauv polyester, chlorine-muaj polyester, acetate fiber, polyvinyl chloride, polystyrene, plexiglass, polyacrylonitrile thiab lwm yam resins. Kev ruaj ntseg hauv cov ntawv pob tshab yog qhov zoo dua li cov ntawv xim. Qhov ntau npaum li cas hauv cov khoom yog 0. feem pua rau 0.5 feem pua .
No.3 UV Absorber UV-O
Cov khoom xyaw: 2, 4-Dihydroxybenzophenone
Cov khoom siv thiab kev siv: Cov khoom no yog lub teeb xim xim zoo li siv lead ua los yog hmoov dawb. Moisture<0.5%. ash=""><0.5%. melting="" point="">-149 degree. Soluble nyob rau hauv acetone, methanol, ethanol, methyl ethyl ketone, dioxane, N-picoline thiab ethyl acetate, heev insoluble nyob rau hauv dej, n-heptane thiab benzene. Solubility ntawm cov khoom no nyob rau hauv ib co kuab tshuaj (g/100ml hnyav, 25 degree) yog acetone 50, benzene 1, ethanol> 50, dej <0.5, n-heptane=""><>
Cov khoom no yog UV absorber, haum rau polyvinyl chloride, polystyrene, epoxy resin, cellulose resin, unsaturated polyester, xim thiab hluavtaws roj hmab. Qhov siab tshaj plaws nqus wavelength ntau yog 280~ 340nm, thiab qhov ntau npaum li cas yog 0.1 feem pua ~ 1 feem pua. Txawm li cas los xij, lub teeb stabilization nyhuv ntawm cov khoom no tsis zoo heev.
No.4 UV Absorber UV-9
Cov khoom xyaw: 2-Hydroxy-4-methoxybenzophenone
Khoom thiab siv: Cov khoom no yog lub teeb daj lossis dawb crystalline hmoov. Qhov ceev 1.324g / cm3. Melting point 62 ~ 66 degree. Boiling point 150-16 0 degree (0.67kPa), 220 degree (2.4kPa). Soluble nyob rau hauv feem ntau organic solvents xws li acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone thiab ethanol, tab sis insoluble nyob rau hauv dej. Kev solubility ntawm cov khoom no hauv qee cov kuab tshuaj (g / 100g hnyav, 25 degree) yog benzene 56.2, n-hexane 4.3, ethanol (95 feem pua) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP18.7.
Cov khoom no yog ultraviolet absorber, haum rau ntau yam yas xws li polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, ABS resin thiab cellulose resin. Qhov siab tshaj plaws nqus wavelength ntau yog 28 ~ 340nm, qhov ntau npaum li cas yog 0.1 feem pua rau 1.5 feem pua, cov thermal stability zoo, thiab nws tsis decompose ntawm 200 degree C. Cov khoom no tsis tshua absorbs pom lub teeb, yog li nws yog tsim rau lub teeb-xim pob tshab khoom. Cov khoom no kuj tseem siv tau rau hauv cov xim thiab hluavtaws roj hmab.
Kev ceev faj txog kev nyab xeeb: Nyiv thiab Ltalis tau hais tias thaum cov khoom no siv rau hauv cov khoom noj khoom haus, qhov ntau npaum li cas yuav tsum tsis pub tshaj 0.3 feem pua.
No.5 UV Absorber UV -531
Cov khoom xyaw: 2-hydroxy-4-n-octyloxybenzophenone
Khoom thiab siv: Cov khoom no yog lub teeb daj lossis dawb crystalline hmoov. Qhov ceev 1.160g / cm3 (25 degree). Melting point 48-49 degree. Soluble hauv acetone, benzene, ethanol, isopropanol, me ntsis soluble hauv dichloroethane, insoluble hauv dej. Kev solubility ntawm cov khoom no hauv qee cov kuab tshuaj (g/100 hnyav, 25 degree) yog acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, thiab dej 0.5.
Cov khoom no yog ultraviolet absorber, uas muaj peev xwm nqus tau ultraviolet rays nrog lub wavelength ntawm 27 0 ~ 330nm. Nws tuaj yeem siv rau ntau yam yas, tshwj xeeb tshaj yog polyethylene, polypropylene, polystyrene, ABS resin, polycarbonate, polyvinyl chloride thiab cob. Zoo compatibility thiab tsawg volatility. Qhov dav dav npaum li cas yog 0.1 feem pua rau 1 feem pua. Nws muaj cov nyhuv synergistic zoo thaum siv nrog me me ntawm 4,4-thiobis(6-tert-butyl-p-cresol). Cov khoom no kuj tseem siv tau los ua lub teeb stabilizer rau ntau yam txheej txheej.
Kev Tiv Thaiv Kev Nyab Xeeb: Cov khoom no muaj cov tshuaj toxicity tsawg. Ntau lub teb chaws tso cai rau cov khoom no siv rau hauv cov khoom yas uas tuaj yeem tiv nrog cov khoom noj. Piv txwv li, hauv Tebchaws Meskas rau polyolefins, qhov ntau npaum li cas hauv UK yog {{0}}}.6 feem pua, thiab qhov ntau npaum li cas rau polyethylene thiab polypropylene hauv ltalis yog 0.5 feem pua. , Nyiv qhov ntau npaum li cas yog polyethylene 0.5 feem pua, polypropylene 1 feem pua, AS resin thiab ABS resin 0.5 feem pua, polyvinyl chloride 0.2 feem pua (tsis tuaj yeem tiv nrog cov khoom noj roj lossis cov khoom noj uas muaj ntau tshaj 20 feem pua ethanol. cov ntsiab lus).
No.6 UV Absorber UVP-327
Cov khoom xyaw: 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-benzotriazole chloride
Cov khoom siv thiab siv: Cov khoom no yog ultraviolet absorber, nws cov yam ntxwv thiab kev siv zoo ib yam li UV-326, nws tuaj yeem nqus tau ultraviolet rays nrog lub wavelength ntawm 270-380nm, thiab muaj tshuaj lom neeg ruaj khov thiab tsawg tsawg. . Zoo compatibility nrog polyolefins. Tshwj xeeb tshaj yog haum rau polyethylene thiab polypropylene. Tsis tas li ntawd, nws tseem tuaj yeem siv rau polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, ABS resin, epoxy resin thiab cellulose resin. Cov khoom no muaj zoo heev thermal sublimation tsis kam, ntxuav tsis kam, roj fading kuj thiab txhua yam cuab yeej tuav. Siv nyob rau hauv ua ke nrog antioxidants rau ib tug tseem ceeb synergistic nyhuv. Txhawm rau txhim kho cov thermo-oxidative stability ntawm cov khoom. Qhov dav dav npaum li cas ntawm cov khoom no hauv cov yas yog 1 feem pua rau 3 feem pua.
Kev Tiv Thaiv Kev Nyab Xeeb: Cov khoom no tsis muaj tshuaj lom. Nyiv, Tebchaws Meskas, Fabkis, thiab Ltalis tso cai rau cov khoom no siv rau hauv cov khoom siv polyolefin uas tuaj yeem tiv nrog cov khoom noj. Qhov ntau npaum li cas yog {{0}}.5 feem pua . 0.2 feem pua , Nyiv thiab Fabkis 0.5 feem pua .
No.7 UV absorber RMB
Cov khoom xyaw: Resorcinol Monobenzoate
Khoom thiab Siv: Cov khoom no yog dawb crystalline hmoov. Lub melting point yog 132 txog 135 degree, thiab lub boiling point yog 14 0 degree (20Pa). Qhov ntom ntom 0.68g / cm3 (20%). Soluble hauv acetone thiab ethanol, me ntsis soluble hauv benzene, dej, n-heptane, thiab lwm yam.
Cov khoom no yog UV teeb stabilizer, thiab nws cov kev ua tau zoo zoo ib yam li cov benzophenone lub teeb stabilizers. Feem ntau siv hauv polyvinyl chloride, cellulose resin, polystyrene, qhov ntau npaum li cas yog 1 feem pua rau 2 feem pua.
No.8 Lub Teeb Stabilizer AM -101
Cov khoom xyaw: 2,2'-thiobis (4-tert-octylphenoxy) npib tsib xee
Khoom thiab siv: Cov khoom no yog cov hmoov ntsuab. Qhov siab tshaj plaws nyob rau hauv cheeb tsam ultraviolet yog 290nm (hauv chloroform). Nws yog tsim rau polyolefin plastics xws li polyethylene thiab polypropylene, tshwj xeeb tshaj yog rau lub teeb stabilization ntawm cov yeeb yaj kiab thiab cov khoom siv fiber ntau, thiab tuaj yeem txhim kho kev ua haujlwm. Cov khoom no muaj cov nyhuv synergistic zoo thaum siv ua ke nrog UV absorber, los yog ntxiv txhim kho lub teeb stabilization nyhuv. Nws lub ntsiab tsis zoo yog cov xim tsaus, uas ua rau cov khoom xim, thiab tib lub sijhawm, nws muaj cov nyhuv antioxidant nrog thioesters ntawm qhov kub thiab txias, ua rau cov khoom grey thiab dub.
Kev Tiv Thaiv Kev Nyab Xeeb: Cov khoom no yog tshuaj lom thiab yuav tsum tau siv ceev faj.
No.9 Lub teeb Stabilizer GW-540
Cov khoom xyaw: Tris (1,2,2,6,6-pentamethylpiperidinyl) phosphite
Khoom thiab Siv: Cov khoom no yog dawb crystalline hmoov. Melting point 122 ~ 124 degree. Soluble hauv ethanol, chloroform, acetone, benzene thiab lwm yam kuab tshuaj, insoluble hauv dej.
Cov khoom no yog ib tug hindered lub teeb stabilizer. Nws tsis muaj peev xwm nqus tau cov kab hluav taws xob ultraviolet, tab sis nws tuaj yeem ntes cov dawb radicals uas tsim los ntawm polymer degradation, decompose hydroperoxides thiab hloov lub zog ntawm cov molecules zoo siab, thiab lwm yam. Lub teeb stabilization nyhuv yog qhov zoo tib yam ultraviolet rays. 24 npaug ntawm absorbent. Cov khoom no yog tsim rau polyethylene, polyethylene thiab lwm yam yas. Nws muaj kev sib raug zoo nrog cov resins, kev ua haujlwm zoo, thiab tsis muaj tshuaj lom. Ntxiv nrog rau lub teeb stabilization, nws kuj muaj qhov zoo thermal thiab oxygen aging kuj. Txawm li cas los xij, cov khoom no muaj cov cua sov tsis zoo thiab tsis haum rau kev siv mus ntev hauv cov dej kub nruab nrab. Tsis tas li ntawd, cov khoom no tau ua tiav zoo tshaj plaws thiab siv tau ntawm qhov kub hauv qab 270 degree, thiab qhov hnyav poob hnyav dua thaum qhov kub siab tshaj qhov kub no.
No.10 Lub Teeb Stabilizer 744
Cov khoom xyaw: 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine
Khoom thiab Siv: Cov khoom no yog dawb crystalline hmoov. Lub melting point yog 95-98 degree, thiab decomposition kub siab tshaj 280 degree. Soluble hauv acetone, ethanol, ethyl acetate, toluene, insoluble hauv dej.
Cov khoom no yog lub teeb stabilizer, uas yuav luag tsis muaj peev xwm nqus tau cov kab hluav taws xob ultraviolet, tab sis tuaj yeem ntes cov dawb radicals uas tsim los ntawm cov ntaub ntawv polymer nyob rau hauv qhov kev txiav txim ntawm ultraviolet rays, thiaj li ua si lub teeb stabilization nyhuv. Cov khoom no yog tsim rau polypropylene, polyethylene, polystyrene, polyurethane, polyamide thiab polyester thiab lwm yam yas, tshwj xeeb tshaj yog nyob rau hauv polyolefins. Lub teeb tsis kam ntawm cov khoom no yog ob peb zaug ntawm cov UV absorbers. Tsis muaj xim, tsis muaj kuab paug, ua haujlwm zoo thaum tshav kub kub, ua ke nrog antioxidants thiab UV absorbers, nws muaj kev sib koom ua ke zoo heev.
No.11 Triazine UV Absorber
Cov khoom xyaw: 2,4,6-tris(2'n-butoxyphenyl)-1,3,5-triazine
Khoom thiab siv: Cov khoom no yog lub teeb daj hmoov. Melting point 156 ~ 165 degree. Soluble hauv hexamethylphosphoric triamide, soluble hauv dimethylformamide thaum rhuab, me ntsis soluble hauv n-butanol, insoluble hauv dej.
Cov khoom no yog ultraviolet absorber, uas tuaj yeem nqus tau cov kab hluav taws xob ultraviolet nrog lub wavelength ntawm 300-380nm. Nws yog tsim rau ntau yam yas xws li polyvinyl chloride, polyoxymethylene, thiab chlorinated polyether. Cov koob tshuaj feem ntau tsis siab tshaj 1 feem pua. Nws lub teeb stabilization efficiency zoo dua li UV-9 thiab UV-531, tab sis cov khoom no muaj cov khoom siv xim, uas tuaj yeem ua rau cov khoom muag daj, thiab kev sib raug zoo nrog cov resin kuj tsis zoo.
No.12 Lub Teeb Stabilizer HPT
Cov khoom xyaw: Hexamethylphosphoric triamide
Cov khoom siv thiab kev siv: Cov khoom no yog cov xim tsis muaj xim lossis lub teeb daj pob tshab nrog cov ntses me ntsis astringency, ntom 1.0253-1.0257g / cm3 (20 degree), khov taw tes 27 degree, boiling point 116-117 degree (1.48kPa), refractive index 1.4582 ~ 1.4589 (20 degree). Nws yog soluble nyob rau hauv polar thiab non-polar cov kuab tshuaj, thiab tuaj yeem miscible nrog cov plasticizers xws li dioctyl phthalate, dioctyl sebacate, thiab triphenyl phosphite nyob rau hauv ib qho kev faib ua feem.
Cov khoom no tuaj yeem siv los ua polyvinyl chloride lub teeb stabilizer. Nws tuaj yeem muab cov khoom lag luam nrog cov khoom zoo sab nraum zoov tiv thaiv kev laus, yog li nws yog hu ua PVC high-efficiency weathering agent. Ntxiv 2 mus rau 5 qhov chaw ntawm cov khoom no rau polyvinyl chloride zaj duab xis tuaj yeem tsis tsuas yog txhim kho nws cov huab cua tiv thaiv thiab txias, tab sis kuj txo qhov kub thiab txias ntawm li 10 degrees. Cov kuab tshuaj zoo heev rau ntau yam khoom siv polymer xws li phenylene sulfide.
