Pamene zokutira zimawonekera panja, zinthu monga chinyezi, kutentha ndi ma radiation a UV zimatha kupangitsa kuti ziwonongeke.Nthawi zambiri, zinthu zomwe zimakhudzidwa kwambiri ndi zokutira ndi ma resin opangidwa ndi filimu ndi ufa.Kutentha kwa ultraviolet ndi madzi kumapangitsa kuti zinthu izi ziwonongeke ndi mankhwala, ndipo zowonongekazi zimathamanga kwambiri kutentha kukakwera.Kuwonongeka kwa zokutira zomwe zimayambitsidwa ndi cheza cha ultraviolet nthawi zambiri zimatchedwa photooxidation.Zomwe zimachitika zimayambitsidwa ndi cheza cha ultraviolet.Oxygen mumlengalenga imakhudzidwa ndi kuwonongeka kwa mankhwala.Zinthu zoterezi zimatchedwa chromophores ndipo zimatha kukhala magulu omalizira a pigment particles, nsana kapena polima zomangira, zonyansa, zotsalira zotsalira, kapena zowonjezera.Ma photon akatengeka, chromophore imatulutsa mphamvu.Izi nthawi zambiri zimatheka pophwanya mgwirizano wa covalent kuti apange ma free radicals awiri.Ma radicals awa nthawi zambiri amakhudzidwa kwambiri ndi okosijeni ndipo amaphatikizana ndi okosijeni kupanga ma radicals aulere okhala ndi mpweya.Akapangidwa, ma radicals awa amatha kuthyola zomangira zamankhwala ena achilengedwe kudzera munjira zosiyanasiyana zama mankhwala, ndikupanga maunyolo omwe amatsogolera ku kuwonongeka kwa polima.Malingana ndi polima, kuwonjezeka kapena kuchepa kwa kachulukidwe kameneka, kapena chiwerengero chachikulu kapena chaching'ono cha mamolekyu, akhoza kuwonedwa.Yoyamba ikhoza kuyambitsa kusweka kwa ❖ kuyanika;Zotsirizirazi zitha kupangitsa kuti ❖ kuyanika viscidity, kukana zosungunulira kapena kukana zikande.Ndipo utoto wonyezimira udzatayika, ndipo mtundu udzasintha.
Kuphatikiza pa photooxidation, filimu yomwe imapanga utomoni mu zokutira imatha kunyozedwa ndi hydrolysis, makamaka pamene kutentha kwa ❖ kuyanika kumawonjezeka pansi pa kuwala kwa dzuwa.Pansi pazimenezi, mamolekyu amadzi omwe amamwedwa mu zokutira amatha kuwononga zomangira zomwe zili mu utomoni ndikudula maunyolo a polima, zomwe zimapangitsa kuti ma cell achepetse.Ma polyester ndi alkyd resins amakhudzidwa kwambiri ndi izi kuposa ma polyurethanes ndi epoxies.
| PRODUCT | CAS NUMBER | ZOLINGANA | DESCRIPTION |
| UV1 | 57834-33-0 | UV1 ndiwowonjezera wotsutsa-uv, womwe umagwiritsidwa ntchito kwambiri mu polyurethane, zomatira, thovu ndi zida zina. | |
| UV3303 | 586400-06-8 | UV3 akulimbikitsidwa mu PU (TPU, RIM) ndi mapulasitiki engineering (PET, PC, PC, ABS, PA, PBT) | |
| UV3331 | 147783-69-5 | SANDUVOR PR 31 | UV 3331 ndi cholepheretsa kuwala kwa amine (HALS) yokhala ndi mphamvu ya UV.Zili choncho yodziwika bwino kwambiri komanso kuthekera kwake kukhazikika mu binder kapena polima matrix pa nthawi ya UV. UV3331 angagwiritsidwe ntchito polyolefine, polystyrene pulasitiki, PVC, PBT ndi zipangizo zina. |
| UV3325 | 7443-25-6
| SANDUVOR PR 25 | UV 3325 ndi choyatsira UV-B cha PVC, ma polyesters, PC, polyamides, mapulasitiki a styrene, ma copolymer a EVA, ndi ma cellulosics.
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| Mtengo wa LS123 | 129757-67-1 | TINUVIN 123 | LS123 imagwiritsidwa ntchito mu zokutira zamagalimoto, zokutira zamafakitale, zokutira zokongoletsa, zokutira zamatabwa, makamaka zolimba kwambiri, utoto wochiritsa wa asidi wamagalimoto ndi mafakitale. |
| Mtengo wa LS292 | 41556-26-7 82919-37-7 | TINUVIN 292 | LS292 imatha kuteteza bwino kusweka, kutayika kwa kuwala ndi matenda ena a lacquer, imatha kusintha kwambiri moyo wautumiki wa zokutira, ndipo mankhwalawo pa kutentha sikudzawoneka bwino. |
| Mtengo wa LS765 | 41556-26-7 82919-37-7 | TINUVIN 765 | LS765 imagwiritsidwa ntchito popaka, makamaka utoto wamagalimoto pofuna kupewa kukalamba. LS765 ndiwothandiza kwambiri madzi stabilizer osiyanasiyana ma polima ndi ntchito, kuphatikizapo polyurethanes, sealants, zomatira, elastomers, unsaturated polyesters, acrylics, vinilu ma polima (PVB, PVC), styrene homopolymers ndi copolymers, polyene ofukula, ndi madzi mtundu concentrates. ma organic substrates ena. |