Marka dahaarka lagu soo bandhigo bannaanka, arrimaha sida qoyaanka, kulaylka iyo shucaaca UV waxay sababi karaan inay hoos u dhacaan.Guud ahaan, qaybaha ugu nugul ee dahaarka waa filim samaynta resins iyo budada.Shucaaca ultraviolet iyo biyaha ayaa sababa in walxahan ay maraan xaaluf kiimikaad, falcelintan nabaad-guurka ah waxay u muuqdaan inay dardargeliyaan marka heerkulku kordho.Nabaad-guurka dahaarka uu keeno shucaaca ultraviolet waxaa inta badan loo yaqaan 'photooxidation'.Falcelinta waxaa kiciyay shucaaca ultraviolet.Ogsajiinta ku jirta jawiga ayaa ku lug leh xaalufinta kiimikada.Walxaha nuugista sawir-qaadista ee noocan oo kale ah waxaa loo yaqaan 'chromophores' waxayna noqon karaan kooxaha ugu dambeeya ee walxaha midabka, laf-dhabarka ama polymer-ka, wasakhda, dareerayaasha haraaga ah, ama wax lagu daro.Marka photon-yada la nuugo, koromophore-ka ayaa soo daaya tamar.Habkan waxaa badanaa lagu gaaraa iyada oo la jebiyo curaarta wadajirka ah si loo sameeyo laba xagjirayaal xor ah.Xagjirayaashan ayaa caadi ahaan aad uga falceliya ogsijiinta waxayna ku daraan ogsijiin si ay u sameeyaan xag-jiryo xor ah oo oksijiin ku salaysan.Marka la sameeyo, xagjirayaashani waxay jebin karaan curaarta kiimikooyinka kale ee organic iyada oo loo marayo tillaabooyin kiimiko oo kala duwan, abuurista falcelin silsilad ah oo u horseedaysa hoos u dhaca polymer.Iyadoo ku xiran polymer-ka, kororka ama hoos u dhaca cufnaanta isku-xiran, ama tiro ka badan ama ka yar oo molecules, ayaa la arki karaa.Midda hore waxay keeni kartaa dillaac daahan;Tan dambe waxay u horseedi kartaa muuqalka dahaarka, caabbinta dareeraha ama caabbinta xoqan.Oo dhalaalka rinjiga ayaa lumi doona, midabkuna wuu beddeli doonaa.
Marka lagu daro photooxidation, filimka samaynta resin ee dahaarka ayaa hoos u dhigi kara hydrolysis, gaar ahaan marka heerkulka dahaarka uu kordho iftiinka qorraxda sare.Xaaladahan, molecules-ka biyaha nuugaya ee dahaarka ku jira waxay weerari karaan curaarta covalent ee resin-ka waxayna gooyaan silsiladaha polymerka, taasoo keenta miisaan unugyo hoose ah.Polyester iyo resins alkyd ayaa aad ugu nugul saameyntan marka loo eego polyurethane iyo epoxies.
| PRODUCT | LAMBARKA CAS | U dhigma | SHARAXA |
| UV1 | 57834-33-0 | UV1 waa daroogo ka hortag ah oo aad waxtar u leh, oo si ballaaran loogu isticmaalo polyurethane, xabagta, xumbo iyo walxo kale. | |
| UV3303 | 586400-06-8 | UV3 waxaa lagula talinayaa PU (TPU, RIM) iyo balaastikada injineernimada (PET, PC, PC, ABS, PA, PBT) | |
| UV3331 | 147783-69-5 | SANDUVOR PR 31 | UV 3331 waa xasiliye nalka aminiga ah oo xannibay (HALS) oo leh shaqeynta nuugayaasha UV.Waa oo lagu garto waxtarkeeda aadka u wanaagsan iyo kartida ay u leedahay in lagu hagaajiyo binder ama matrix polymer inta lagu jiro soo-gaadhista UV. UV3331 waxaa loo isticmaali karaa in polyolefine, caag polystyrene, PVC, PBT iyo qalab kale. |
| UV3325 | 7443-25-6
| SANDUVOR PR 25 | UV 3325 waa nuugista UV-B ee PVC, polyesters, PC, polyamides, caagadaha styrene, EVA copolymers, iyo cellulosics.
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| LS123 | 129757-67-1 | TINUVIN 123 | LS123 waxaa loo isticmaalaa daahan baabuurta, dahaarka warshadaha, dahaarka qurxinta, dahaarka alwaax, gaar ahaan adkaha sare, baabuurta daaweynta acid iyo rinjiga warshadaha. |
| LS292 | 41556-26-7 82919-37-7 | TINUVIN 292 | LS292 waxay si wax ku ool ah uga hortagi kartaa dildilaaca, luminta iftiinka iyo cudurrada kale ee lacquer, waxay si weyn u wanaajin kartaa nolosha adeegga ee daahan, iyo badeecada heerkulka qolka ma kicin doono. |
| LS765 | 41556-26-7 82919-37-7 | TINUVIN 765 | LS765 waxaa loo isticmaalaa daaha, gaar ahaan rinjiyada baabuurta si looga hortago gabowga. LS765 waa xasiliye dareere ah oo wax ku ool ah oo loogu talagalay noocyo kala duwan oo polymers ah iyo codsiyo, oo ay ku jiraan polyurethane, shaatiinka, koolada, elastomers, polyester-ka aan saturated, acrylics, vinyl polymers (PVB, PVC), homopolymers styrene iyo copolymers, polyene vertical, midab dareere ah iyo substrates kale organic. |