{"id":5369,"date":"2022-07-12T13:32:13","date_gmt":"2022-07-12T13:32:13","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5369"},"modified":"2024-12-11T15:43:47","modified_gmt":"2024-12-11T15:43:47","slug":"brief-description-of-hydrogen-capturing-photoinitiators","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/brief-description-of-hydrogen-capturing-photoinitiators\/","title":{"rendered":"A hidrog\u00e9nk\u00f6t\u0151 fotoinici\u00e1torok \u00e9s k\u00e9t f\u0151 kateg\u00f3ri\u00e1juk r\u00f6vid le\u00edr\u00e1sa"},"content":{"rendered":"

A hidrog\u00e9nk\u00f6t\u0151 fotoinici\u00e1torok \u00e9s k\u00e9t f\u0151 kateg\u00f3ri\u00e1juk r\u00f6vid le\u00edr\u00e1sa<\/strong><\/h1>\n

A hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1torok, m\u00e1s n\u00e9ven II. t\u00edpus\u00fa fotoinici\u00e1torok, \u00e1ltal\u00e1ban az arom\u00e1s ketonszerkezetek domin\u00e1lnak, \u00e9s bizonyos vastag gy\u0171r\u0171s arom\u00e1s sz\u00e9nhidrog\u00e9nek is tartoznak hozz\u00e1juk. Ezek bizonyos f\u00e9nyelnyel\u0151 tulajdons\u00e1gokkal rendelkeznek, \u00e9s a hozz\u00e1juk illeszked\u0151 t\u00e1rs-inici\u00e1tor, azaz a hidrog\u00e9ndonor \u00f6nmag\u00e1ban nem rendelkezik abszorpci\u00f3val a hossz\u00fahull\u00e1m\u00fa UV-tartom\u00e1nyban. A hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1torok elnyelik az UV-energi\u00e1t, \u00e9s a gerjesztett \u00e1llapotban l\u00e9v\u0151 ko-inici\u00e1torral bimolekul\u00e1ris k\u00f6lcs\u00f6nhat\u00e1sba l\u00e9pve reakt\u00edv gy\u00f6k\u00f6ket hoznak l\u00e9tre. Tercier aminokat gyakran haszn\u00e1lnak ko-inici\u00e1tork\u00e9nt a hidrog\u00e9nbefogad\u00f3 fotoinici\u00e1torokkal val\u00f3 p\u00e1ros\u00edt\u00e1shoz. A k\u00f6vetkez\u0151 \u00e1bra a benzofenon fotoinici\u00e1tor p\u00e9ld\u00e1j\u00e1n mutatja be a hat\u00e1sfolyamatot.<\/p>\n

 <\/p>\n

El\u0151sz\u00f6r is, benzofenon + tercier amin fotoinici\u00e1tor rendszer<\/p>\n

A benzofenon (BP) fotoinici\u00e1tor \u00e1ltal\u00e1ban sz\u00edntelen vagy enyh\u00e9n s\u00e1rga krist\u00e1lyok, a k\u00f6z\u00f6s old\u00f3szerekben val\u00f3 oldhat\u00f3s\u00e1g viszonylag j\u00f3, a maxim\u00e1lis abszorpci\u00f3s hull\u00e1mhossz k\u00f6r\u00fclbel\u00fcl 340 nm, \u00e9s a k\u00f6zepes nyom\u00e1s\u00fa higanyl\u00e1mpa emisszi\u00f3s hull\u00e1mhossza megegyezik. Itt kell figyeln\u00fcnk a benzofenon fotoinici\u00e1tor \u00e9s a benzofenon UV-abszorber k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9gre, szerkezet\u00fck viszonylag hasonl\u00f3, a benzofenon UV-abszorber maxim\u00e1lis abszorpci\u00f3s hull\u00e1mhossza \u00e1ltal\u00e1ban 330 nm k\u00f6r\u00fcl van. A BP szint\u00e9zise egyszer\u0171, olcs\u00f3 fotoinici\u00e1tor, de a fotoinici\u00e1tor aktivit\u00e1sa \u00e1ltal\u00e1ban nem olyan j\u00f3, mint a HMPP, a HCPK \u00e9s m\u00e1s \u00e1ltal\u00e1nosan haszn\u00e1lt repeszt\u0151 fotoinici\u00e1torok. A BP-t\u00edpus\u00fa fotoinici\u00e1torok kem\u00e9nyed\u00e9si sebess\u00e9ge viszonylag lass\u00fa, \u00e9s k\u00f6nnyen s\u00e1rgul\u00e1st okoz a kikem\u00e9ny\u00edtett bevonat, \u00e9s a s\u00e1rgul\u00e1st s\u00falyosb\u00edtja a nagy mennyis\u00e9g\u0171 tercier amin t\u00e1rs-inici\u00e1torok haszn\u00e1lata.<\/p>\n

 <\/p>\n

A BP-nek mint hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1tornak is megvannak a maga el\u0151nyei. El\u0151sz\u00f6r is, alacsony k\u00f6lts\u00e9ge \u00e9s alacsony \u00e1ra miatt alkalmazhat\u00f3 n\u00e9h\u00e1ny alacsony hozz\u00e1adott \u00e9rt\u00e9k\u0171 \u00e9s alacsony min\u0151s\u00e9gi k\u00f6vetelm\u00e9nyeket t\u00e1maszt\u00f3 k\u00e9sz\u00edtm\u00e9nyben. Ilyenek p\u00e9ld\u00e1ul a dekorat\u00edv pattint\u00e1si bevonatok \u00e9s a sz\u00ednes hordoz\u00f3 lakkbevonatok. A k\u00f6lts\u00e9gek, a s\u00e1rgul\u00e1s, a kem\u00e9nyed\u00e9si sebess\u00e9g \u00e9s m\u00e1s t\u00e9nyez\u0151k kiegyens\u00falyoz\u00e1sa \u00e9rdek\u00e9ben a BP-t gyakran m\u00e1s repedez\u0151 fotoinici\u00e1torokkal kombin\u00e1lva haszn\u00e1lj\u00e1k, BP \u00e9s akt\u00edv amin kombin\u00e1lt alkalmaz\u00e1sa, az akt\u00edv amin antioxid\u00e1ns polimeriz\u00e1ci\u00f3s funkci\u00f3val rendelkezik, \u00edgy a BP + akt\u00edv amin rendszer antioxid\u00e1ns polimeriz\u00e1ci\u00f3s hat\u00e1sa jobb. Meg kell azonban jegyezni, hogy ha a BP mennyis\u00e9ge nagy, k\u00f6nnyen vezethet a f\u00e9nyv\u00e9delem als\u00f3 r\u00e9teg\u00e9hez.<\/p>\n

 <\/p>\n

A BP sz\u00e1mos szubsztitu\u00e1lt sz\u00e1rmaz\u00e9ka hat\u00e9kony fotoinici\u00e1tor, a legfontosabb sz\u00e1rmaz\u00e9k a Michler-keton (MK), amely a BP 4,4-bisz (dialkilamino) szubsztituens\u00e9t jelenti, a k\u00f6z\u00f6s szerkezet a bal oldali \u00e1br\u00e1n l\u00e1that\u00f3.<\/p>\n

A Michler-keton a BP-hez viszony\u00edtva, a f\u00e9ny hull\u00e1mhossz\u00e1t v\u00f6r\u00f6sre eltolt t\u00f6bb t\u00edz nanom\u00e9teres hull\u00e1mhosszon elnyel\u0151, er\u0151s abszorpci\u00f3t mutat a 365 nm-es ultraibolya f\u00e9nyben. Mivel tercier amin szerkezetet tartalmaz, \u00edgy a michanon \u00f6nmag\u00e1ban is haszn\u00e1lhat\u00f3 fotoinici\u00e1tork\u00e9nt, de a hat\u00e9konys\u00e1g nem teljesen fejlett. Mint p\u00e9ld\u00e1ul MK \u00e9s BP egy\u00fctt haszn\u00e1lt fotopolimeriz\u00e1ci\u00f3 akril\u00e1tok, meg\u00e1llap\u00edtotta, hogy a kezdem\u00e9nyez\u00e9si aktivit\u00e1s sokkal magasabb, mint MK \/ tercier amin rendszer \u00e9s BP \/ tercier amin rendszer, a polimeriz\u00e1ci\u00f3s sebess\u00e9g k\u00f6r\u00fclbel\u00fcl 10-szerese az ut\u00f3bbi k\u00e9t.<\/p>\n

M\u00e1sodszor, tioxantron + tercier amin fotoinici\u00e1l\u00f3 rendszer<\/p>\n

A tioxantont hidrog\u00e9nmegragad\u00f3 fotoinici\u00e1tork\u00e9nt is haszn\u00e1lj\u00e1k, \u00e9s maxim\u00e1lis abszorpci\u00f3s hull\u00e1mhossza el\u00e9rheti a 380 ~ 420 nm-t, \u00e9s az extinkci\u00f3s egy\u00fctthat\u00f3 is magasabb, k\u00f6r\u00fclbel\u00fcl 102 nagys\u00e1grenddel, ami teljes m\u00e9rt\u00e9kben kihaszn\u00e1lhatja a f\u00e9nyforr\u00e1s 365 nm-es \u00e9s 405 nm-es f\u00e9nyhull\u00e1m energi\u00e1j\u00e1t, ami sokkal hat\u00e9konyabb, mint a benzofenon fotoinici\u00e1tor. Az inici\u00e1ci\u00f3s mechanizmus szempontj\u00e1b\u00f3l a tioxantron fotoinici\u00e1tor rendszer hasonl\u00f3 a benzofenon rendszerhez. A tioxanton (TX) \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 sz\u00e1rmaz\u00e9kai szerkezeti k\u00e9pletei az al\u00e1bbiakban l\u00e1that\u00f3k.<\/p>\n

 <\/p>\n

A tioxanton vil\u00e1goss\u00e1rga por, amely a legt\u00f6bb old\u00f3szerben nagyon rosszul old\u00f3dik, ez\u00e9rt nehezen diszperg\u00e1lhat\u00f3 a gyantarendszerekben. A legt\u00f6bbj\u00fck j\u00f3 oldhat\u00f3s\u00e1ggal \u00e9s diszperg\u00e1l\u00e1si tulajdons\u00e1gokkal rendelkezik, \u00e9s az abszorbancia \u00e9s a fotok\u00e9miai aktivit\u00e1s jav\u00edthat\u00f3. A gyakori szubsztitu\u00e1lt TX k\u00f6z\u00e9 tartozik a 2-kl\u00f3rtiantron (CTX), a CPTX, az izopropiltioantron (ITX) \u00e9s a 2,4-dietiltioantron (DETX) stb. A CTX oldhat\u00f3s\u00e1ga m\u00e9g mindig nem kiel\u00e9g\u00edt\u0151, \u00e9s fokozatosan felv\u00e1ltotta az ut\u00f3bbi kett\u0151.<\/p>\n

A tiantron szubsztituenseket megfelel\u0151 akt\u00edv aminokkal kell p\u00e1ros\u00edtani a hat\u00e9kony fotoinici\u00e1l\u00f3 aktivit\u00e1s el\u00e9r\u00e9s\u00e9hez. Meg\u00e1llap\u00edtott\u00e1k, hogy az etil-4-dimetilaminobenzo\u00e1t (EDAB) a legmegfelel\u0151bb reakt\u00edv amin t\u00e1rs-inici\u00e1tor a tiantronnal val\u00f3 haszn\u00e1latra, amely nemcsak nagyon akt\u00edv, hanem kev\u00e9sb\u00e9 er\u0151s s\u00e1rgul\u00e1ssal is j\u00e1r. Az ITX-et a piac sz\u00e9les k\u00f6rben elfogadta viszonylag j\u00f3 k\u00f6lts\u00e9gteljes\u00edtm\u00e9nye miatt.<\/p>\n

 <\/p>\n

<\/h2>\n

L\u00e9pjen kapcsolatba vel\u00fcnk most!<\/b><\/strong><\/h2>\n

Ha sz\u00fcks\u00e9ge van Price-ra, k\u00e9rj\u00fck, t\u00f6ltse ki el\u00e9rhet\u0151s\u00e9g\u00e9t az al\u00e1bbi \u0171rlapon, \u00e1ltal\u00e1ban 24 \u00f3r\u00e1n bel\u00fcl felvessz\u00fck \u00d6nnel a kapcsolatot. \u00d6n is k\u00fcldhet nekem e-mailt info@longchangchemical.com<\/a><\/span>\u00a0munkaid\u0151ben ( 8:30-18:00 UTC+8 H.-Szombat ) vagy haszn\u00e1lja a weboldal \u00e9l\u0151 chatj\u00e9t, hogy azonnali v\u00e1laszt kapjon.<\/b><\/strong><\/h4>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Fotoinici\u00e1tor TPO<\/span><\/a><\/td>\nCAS 75980-60-8<\/td>\n<\/tr>\n
Fotoinici\u00e1tor TMO<\/span><\/a><\/td>\nCAS 270586-78-2<\/td>\n<\/tr>\n
PD-01 fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 579-07-7<\/td>\n<\/tr>\n
Fotoinici\u00e1tor PBZ<\/span><\/a><\/td>\nCAS 2128-93-0<\/td>\n<\/tr>\n
OXE-02 fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 478556-66-0<\/td>\n<\/tr>\n
Fotoinici\u00e1tor OMBB<\/span><\/a><\/td>\nCAS 606-28-0<\/td>\n<\/tr>\n
Fotoinici\u00e1tor MPBZ (6012)<\/span><\/a><\/td>\nCAS 86428-83-3<\/td>\n<\/tr>\n
Fotoinici\u00e1tor MBP<\/span><\/a><\/td>\nCAS 134-84-9<\/td>\n<\/tr>\n
Fotoinici\u00e1tor MBF<\/span><\/a><\/td>\nCAS 15206-55-0<\/td>\n<\/tr>\n
Fotoinici\u00e1tor LAP<\/span><\/a><\/td>\nCAS 85073-19-4<\/td>\n<\/tr>\n
Fotoinici\u00e1tor ITX<\/span><\/a><\/td>\nCAS 5495-84-1<\/td>\n<\/tr>\n
EMK fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 90-93-7<\/td>\n<\/tr>\n
Fotoinici\u00e1tor EHA<\/span><\/a><\/td>\nCAS 21245-02-3<\/td>\n<\/tr>\n
Fotoinici\u00e1tor EDB<\/span><\/a><\/td>\nCAS 10287-53-3<\/td>\n<\/tr>\n
DETX fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 82799-44-8<\/td>\n<\/tr>\n
Fotoinici\u00e1tor CQ \/ k\u00e1mforkinon<\/span><\/a><\/td>\nCAS 10373-78-1<\/td>\n<\/tr>\n
Fotoinici\u00e1tor CBP<\/span><\/a><\/td>\nCAS 134-85-0<\/td>\n<\/tr>\n
BP \/ benzofenon fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 119-61-9<\/td>\n<\/tr>\n
Fotoinici\u00e1tor BMS<\/span><\/a><\/td>\nCAS 83846-85-9<\/td>\n<\/tr>\n
F\u00e9nykezdem\u00e9nyez\u0151 938<\/span><\/a><\/td>\nCAS 61358-25-6<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 937<\/span><\/a><\/td>\nCAS 71786-70-4<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 819 DW<\/span><\/a><\/td>\nCAS 162881-26-7<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 819<\/span><\/a><\/td>\nCAS 162881-26-7<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 784<\/span><\/a><\/td>\nCAS 125051-32-3<\/td>\n<\/tr>\n
754 fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 211510-16-6 442536-99-4<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 6993<\/span><\/a><\/td>\nCAS 71449-78-0<\/td>\n<\/tr>\n
6976 fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 71449-78-0 89452-37-9 108-32-7<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 379<\/span><\/a><\/td>\nCAS 119344-86-4<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 369<\/span><\/a><\/td>\nCAS 119313-12-1<\/td>\n<\/tr>\n
Fotoinici\u00e1tor 160<\/a><\/span><\/td>\nCAS 71868-15-0<\/td>\n<\/tr>\n
F\u00e9nyind\u00edt\u00f3 1206<\/span><\/a><\/td>\n<\/td>\n<\/tr>\n
1173 fotoinici\u00e1tor<\/span><\/a><\/td>\nCAS 7473-98-5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

A hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1torok \u00e9s k\u00e9t f\u0151 kateg\u00f3ri\u00e1juk r\u00f6vid le\u00edr\u00e1sa A hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1torokat, m\u00e1s n\u00e9ven II. t\u00edpus\u00fa fotoinici\u00e1torokat \u00e1ltal\u00e1ban az arom\u00e1s ketonszerkezetek uralj\u00e1k, \u00e9s bizonyos vastaggy\u0171r\u0171s arom\u00e1s sz\u00e9nhidrog\u00e9nek is tartoznak hozz\u00e1juk. Bizonyos f\u00e9nyelnyel\u0151 tulajdons\u00e1gokkal rendelkeznek, \u00e9s a hozz\u00e1juk illeszked\u0151 t\u00e1rs-inici\u00e1tor, azaz a hidrog\u00e9ndonor \u00f6nmag\u00e1ban nem rendelkezik elnyel\u00e9ssel a hossz\u00fahull\u00e1m\u00fa UV-tartom\u00e1nyban. A hidrog\u00e9nmegk\u00f6t\u0151 fotoinici\u00e1torok [...]<\/p>","protected":false},"author":1,"featured_media":5188,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nBrief description of hydrogen-capturing photoinitiators and their two main categories - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/hu\/brief-description-of-hydrogen-capturing-photoinitiators\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Brief description of hydrogen-capturing photoinitiators and their two main categories - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Brief description of hydrogen-capturing photoinitiators and their two main categories Hydrogen-capturing photoinitiators, also known as type II photoinitiators, are generally dominated by aromatic ketone structures and also include certain thick-ringed aromatic hydrocarbons. They have certain light-absorbing properties, and the matching co-initiator, i.e. hydrogen donor, itself has no absorption in the long-wave UV range. 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