{"id":8837,"date":"2025-09-05T10:08:44","date_gmt":"2025-09-05T10:08:44","guid":{"rendered":"https:\/\/changhongchemical.com\/?p=8837"},"modified":"2026-04-27T11:16:00","modified_gmt":"2026-04-27T11:16:00","slug":"what-is-a-photoinitiator","status":"publish","type":"post","link":"https:\/\/changhongchemical.com\/de\/what-is-a-photoinitiator\/","title":{"rendered":"Was ist ein Fotoinitiator\uff1f?"},"content":{"rendered":"<h1><strong>Was ist ein Fotoinitiator?<\/strong><strong>\uff1f<\/strong><\/h1>\n<p>Photoinitiator, auch bekannt als (Photosensibilisator) oder (Photoh\u00e4rtungsmittel),<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-8841\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1.webp\" alt=\"\" width=\"3462\" height=\"2084\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-768x462.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1536x925.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-2048x1233.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1196x720.webp 1196w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-600x361.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/>Diese Verbindungen absorbieren spezifische Wellenl\u00e4ngen von Lichtenergie im ultravioletten (250-420 nm) oder sichtbaren (400-800 nm) Bereich und erzeugen reaktive Spezies wie freie Radikale oder Kationen, die dann die Polymerisation, Vernetzung und H\u00e4rtung einleiten. Sie spielen eine Schl\u00fcsselrolle in photoh\u00e4rtenden Systemen und werden h\u00e4ufig in UV-Klebstoffen, UV-Beschichtungen, UV-Farben und Gel-Polituren verwendet.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>01 Handlungsgrundsatz<\/b><\/strong><\/p>\n<p>Nach der Absorption von Lichtenergie gehen Photoinitiatormolek\u00fcle vom Grundzustand in einen angeregten Zustand \u00fcber und machen dabei chemische Ver\u00e4nderungen \u00fcber Singulett- oder Triplett-Zust\u00e4nde durch, um aktive Fragmente (wie freie Radikale und Kationen) zu erzeugen, die die Polymerisation einleiten k\u00f6nnen. Auf der Grundlage ihres Mechanismus k\u00f6nnen sie wie folgt kategorisiert werden:<\/p>\n<p><strong><b>- Freie radikalische Photoinitiatoren: <\/b><\/strong>Diese erzeugen durch Spaltungs- oder Wasserstoffabstraktionsreaktionen freie Radikale, die eine radikalische Polymerisation einleiten.<\/p>\n<p><strong><b>- Kationische Photoinitiatoren: <\/b><\/strong>Nach der Photolyse bilden sie eine starke Protonens\u00e4ure (z. B. eine Br\u00f8nsted-S\u00e4ure), die eine kationische Polymerisation einleitet.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>02 Klassifizierung und typische Vertreter<\/b><\/strong><\/p>\n<p>Freie radikalische Photoinitiatoren:<\/p>\n<p><strong><b>(1) Initiatoren vom Typ Spaltung<\/b><\/strong><\/p>\n<p>Nach der Absorption von Lichtenergie kommt es zu einer Norrish-I-Reaktion, bei der die Bindung bricht und freie Radikale entstehen:<\/p>\n<ul>\n<li><strong><b> 1173 (HMPP): <\/b><\/strong>2-Hydroxy-2-methyl-1-phenylpropanon<\/li>\n<li><strong><b> 184 (HCPK): <\/b><\/strong>1-Hydroxycyclohexylphenylketon<\/li>\n<\/ul>\n<p><strong><b><img decoding=\"async\" class=\"alignnone size-full wp-image-8838\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173.webp\" alt=\"\" width=\"3462\" height=\"2084\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-768x462.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-1536x925.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-2048x1233.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-1196x720.webp 1196w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/184-1173-600x361.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/>907: <\/b><\/strong>2-Methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanon<\/p>\n<p><strong><b><img decoding=\"async\" class=\"alignnone size-full wp-image-8839\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937.webp\" alt=\"\" width=\"3462\" height=\"2084\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-768x462.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-1536x925.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-2048x1233.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-1196x720.webp 1196w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/937-600x361.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/>TPO: <\/b><\/strong>2,4,6-Trimethylbenzoyl-diphenylphosphinoxid<\/p>\n<p><strong><b><img decoding=\"async\" class=\"alignnone size-full wp-image-8840\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo.webp\" alt=\"\" width=\"3462\" height=\"2084\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-768x462.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-1536x925.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-2048x1233.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-1196x720.webp 1196w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/tpo-600x361.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/><a href=\"https:\/\/changhongchemical.com\/product\/photoinitiator-tpo-l-cas-84434-11-7\/\">TPO-L<\/a>: <\/b><\/strong>Ethyl-2,4,6-trimethylbenzoylphenylphosphonat<\/p>\n<p><strong><b>659: <\/b><\/strong>2-Hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanon<\/p>\n<p>MBF: Methylbenzoylformiat<\/p>\n<p><strong><b>(2) Initiatoren f\u00fcr die Wasserstoffabstraktion<\/b><\/strong><\/p>\n<p>Erzeugung freier Radikale durch Wasserstoffabstraktionsreaktion:<\/p>\n<ul>\n<li><strong><b> BP: <\/b><\/strong><a href=\"https:\/\/changhongchemical.com\/product\/photoinitiator-bp-cas-119-61-9\/\">Benzophenon<\/a><\/li>\n<li><strong><b> MBP: <\/b><\/strong>4-Methylbenzophenon<\/li>\n<\/ul>\n<p><strong><b>(3) Zusammengesetzter Initiator<\/b><\/strong><\/p>\n<ul>\n<li><b><\/b><strong><b>IHT-PI 910: <\/b><\/strong><\/li>\n<\/ul>\n<p>2-Dimethylamino-2-benzyl-1-[4-(4-morpholinyl)phenyl]-1-butanon<\/p>\n<ul>\n<li><strong><b> IHT-PI 4265:<\/b><\/strong>50% TPO + 50% 1173<\/li>\n<li><strong><b> IHT-PI 1000:<\/b><\/strong>20% 184 + 80% 1173<\/li>\n<li><strong><b>IHT-PI 500:<\/b><\/strong>50% 184 + 50% BP<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong><b>Kationische Photoinitiatoren:<\/b><\/strong><\/p>\n<p>Durch Photolyse entsteht eine Supers\u00e4ure, die die Polymerisation von Epoxiden, Vinylethern und anderen Materialien einleitet:<\/p>\n<ul>\n<li>Ioniumsalze (z. B. I-250)<\/li>\n<li>Sulfoniumsalze (z. B. I-160)<\/li>\n<li>Metallocen-Salze (z. B. Cumol-Ferrocenium-Hexafluorophosphat)<\/li>\n<li>Organosilane<\/li>\n<\/ul>\n<p><strong><b>03 Zusammenfassung der strukturellen Klassifizierung<\/b><\/strong><\/p>\n<p>Freie radikalische Photoinitiatoren:<\/p>\n<p>- Benzoin und Derivate (Benzoehther)<\/p>\n<p>- Benzylgruppen (Benzoylbenzophenone)<\/p>\n<p>- Alkylphenone (\u03b1-Hydroxyalkylphenone, \u03b1-Aminoalkylphenone)<\/p>\n<p>- Acylphosphinoxide (TPO, usw.)<\/p>\n<p>- Benzophenone<\/p>\n<p>- Thioxanthone<\/p>\n<p>Kationische Photoinitiatoren:<\/p>\n<p>- Oniumsalze (Ioniumsalze, Sulfoniumsalze)<\/p>\n<p>- Metallorganische Stoffe (Ferroceniumsalze)<\/p>\n<p>- Organosilane<\/p>\n<p><strong><b>04 Anwendungsbereiche<\/b><\/strong><\/p>\n<p>Photoinitiatoren sind Kernbestandteile der Strahlenh\u00e4rtungstechnologie und werden in vielen Bereichen eingesetzt:<\/p>\n<p>UV-Beschichtungen: Holz-, Kunststoff- und Metallbeschichtungen<\/p>\n<p><strong><b><img decoding=\"async\" class=\"alignnone size-full wp-image-8842\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2.webp\" alt=\"\" width=\"3462\" height=\"2084\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-768x462.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1536x925.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-2048x1233.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1196x720.webp 1196w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-600x361.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/>UV-Farben:<\/b><\/strong>\u00a0Druck- und Verpackungsindustrie<\/p>\n<p><strong><b>UV-Klebstoffe:<\/b><\/strong>\u00a0Klebstoffe f\u00fcr Elektronik und Medizin<\/p>\n<p><strong><b>Gel-Politur:<\/b><\/strong>\u00a0UV\/LED-h\u00e4rtender Gel-Lack (wie CHROM\u00c9CLAIR's <a href=\"https:\/\/chromeclair.com\/\">HEMA-freie Gel-Politur<\/a>) f\u00fcr die Nagelkunstindustrie, das schnell aush\u00e4rtet, hochgl\u00e4nzend und abriebfest ist<\/p>\n<p><strong><b>Andere lichth\u00e4rtende Materialien: <\/b><\/strong>3D-Druck, Photoresists usw.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>05 Merkmale und Vorteile<\/b><\/strong><\/p>\n<p>Die lichth\u00e4rtende Technologie entspricht den \"5E\"-Standards:<\/p>\n<ul>\n<li><strong><b> Effizient:<\/b><\/strong>Heilt in Sekundenschnelle<\/li>\n<li><strong><b> Erm\u00f6glichen:<\/b><\/strong>Anwendbar auf einer Vielzahl von Substraten<\/li>\n<li><strong><b> Wirtschaftlich: <\/b><\/strong>Geringer Energieverbrauch und hohe Produktionseffizienz<\/li>\n<li><strong><b> Energiesparend: <\/b><\/strong>Reaktion bei Raumtemperatur, kein Erhitzen erforderlich<\/li>\n<li><strong><b> Umweltfreundlich: <\/b><\/strong>Keine VOC-Emissionen, geringe Umweltbelastung<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>photoinitiator, also known as (photosensitizer) or (photocuring agent), These compounds absorb specific wavelengths of light energy in the ultraviolet (250-420 nm) or visible (400-800 nm) regions, generating reactive species such as free radicals or&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8837","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is a photoinitiator\uff1f<\/title>\n<meta name=\"description\" content=\"photoinitiator, also known as (photosensitizer) or (photocuring agent),These compounds absorb specific wavelengths of light energy in the ultraviolet (250-420 nm) or visible (400-800 nm) regions, generating reactive species such as free radicals or cations, which then initiate polymerization, crosslinking, and curing. 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