{"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\/fr\/what-is-a-photoinitiator\/","title":{"rendered":"Qu'est-ce qu'un photoinitiateur\uff1f ?"},"content":{"rendered":"<h1><strong>Qu'est-ce qu'un photo-initiateur ?<\/strong><strong>\uff1f<\/strong><\/h1>\n<p>photo-initiateur, \u00e9galement appel\u00e9 (photosensibilisateur) ou (agent photopolym\u00e9risant),<\/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\" \/>Ces compos\u00e9s absorbent des longueurs d'onde sp\u00e9cifiques de l'\u00e9nergie lumineuse dans les r\u00e9gions ultraviolettes (250-420 nm) ou visibles (400-800 nm), g\u00e9n\u00e9rant des esp\u00e8ces r\u00e9actives telles que des radicaux libres ou des cations, qui initient ensuite la polym\u00e9risation, la r\u00e9ticulation et le durcissement. Ils jouent un r\u00f4le cl\u00e9 dans les syst\u00e8mes de photopolym\u00e9risation et sont largement utilis\u00e9s dans les adh\u00e9sifs UV, les rev\u00eatements UV, les encres UV et les vernis en gel.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>01 Principe d'action<\/b><\/strong><\/p>\n<p>Apr\u00e8s avoir absorb\u00e9 l'\u00e9nergie lumineuse, les mol\u00e9cules photo-initiatrices passent de l'\u00e9tat fondamental \u00e0 un \u00e9tat excit\u00e9, subissant des changements chimiques via des \u00e9tats singlet ou triplet pour g\u00e9n\u00e9rer des fragments actifs (tels que des radicaux libres et des cations) qui peuvent initier la polym\u00e9risation. En fonction de leur m\u00e9canisme, ils peuvent \u00eatre class\u00e9s comme suit :<\/p>\n<p><strong><b>- Photoinitiateurs de radicaux libres : <\/b><\/strong>Ceux-ci g\u00e9n\u00e8rent des radicaux libres par des r\u00e9actions de clivage ou d'abstraction d'hydrog\u00e8ne, initiant ainsi une polym\u00e9risation par radicaux libres.<\/p>\n<p><strong><b>- Photoinitiateurs cationiques : <\/b><\/strong>Apr\u00e8s photolyse, ils g\u00e9n\u00e8rent un acide protonique fort (tel qu'un acide de Br\u00f8nsted), initiant une polym\u00e9risation cationique.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>02 Classification et repr\u00e9sentants types<\/b><\/strong><\/p>\n<p>Photoinitiateurs de radicaux libres :<\/p>\n<p><strong><b>(1) Initiateurs de type clivage<\/b><\/strong><\/p>\n<p>Apr\u00e8s avoir absorb\u00e9 l'\u00e9nergie lumineuse, une r\u00e9action de Norrish I se produit et la liaison se brise pour g\u00e9n\u00e9rer des radicaux libres :<\/p>\n<ul>\n<li><strong><b> 1173 (HMPP) : <\/b><\/strong>2-Hydroxy-2-m\u00e9thyl-1-ph\u00e9nylpropanone<\/li>\n<li><strong><b> 184 (HCPK) : <\/b><\/strong>1-Hydroxycyclohexylph\u00e9nylc\u00e9tone<\/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-M\u00e9thyl-2-(4-morpholinyl)-1-[4-(m\u00e9thylthio)ph\u00e9nyl]-1-propanone<\/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>Oxyde de 2,4,6-trim\u00e9thylbenzoyl-diph\u00e9nylphosphine<\/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-trim\u00e9thylbenzoylph\u00e9nylphosphonate<\/p>\n<p><strong><b>659: <\/b><\/strong>2-Hydroxy-2-m\u00e9thyl-1-[4-(2-hydroxy\u00e9thoxy)ph\u00e9nyl]-1-propanone<\/p>\n<p>MBF : benzoylformate de m\u00e9thyle<\/p>\n<p><strong><b>(2) Initiateurs d'abstraction d'hydrog\u00e8ne<\/b><\/strong><\/p>\n<p>G\u00e9n\u00e9rer des radicaux libres par la r\u00e9action d'abstraction d'hydrog\u00e8ne :<\/p>\n<ul>\n<li><strong><b> BP : <\/b><\/strong><a href=\"https:\/\/changhongchemical.com\/product\/photoinitiator-bp-cas-119-61-9\/\">Benzoph\u00e9none<\/a><\/li>\n<li><strong><b> MBP : <\/b><\/strong>4-m\u00e9thylbenzoph\u00e9none<\/li>\n<\/ul>\n<p><strong><b>(3) Initiateur composite<\/b><\/strong><\/p>\n<ul>\n<li><b><\/b><strong><b>IHT-PI 910 : <\/b><\/strong><\/li>\n<\/ul>\n<p>2-dim\u00e9thylamino-2-benzyl-1-[4-(4-morpholinyl)ph\u00e9nyl]-1-butanone<\/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>Photoinitiateurs cationiques :<\/b><\/strong><\/p>\n<p>La photolyse g\u00e9n\u00e8re un superacide qui d\u00e9clenche la polym\u00e9risation des \u00e9poxydes, des \u00e9thers de vinyle et d'autres mat\u00e9riaux :<\/p>\n<ul>\n<li>Sels d'ionium (par exemple, I-250)<\/li>\n<li>Sels de sulfonium (par exemple, I-160)<\/li>\n<li>Sels m\u00e9talloc\u00e8nes (par exemple, hexafluorophosphate de cum\u00e8ne et de ferroc\u00e9nium)<\/li>\n<li>Organosilanes<\/li>\n<\/ul>\n<p><strong><b>03 R\u00e9sum\u00e9 de la classification structurelle<\/b><\/strong><\/p>\n<p>Photoinitiateurs de radicaux libres :<\/p>\n<p>- Benjoin et d\u00e9riv\u00e9s (\u00e9thers de benjoin)<\/p>\n<p>- Benzyles (Benzoyl Benzoph\u00e9nones)<\/p>\n<p>- Alkylph\u00e9nones (\u03b1-Hydroxyalkylph\u00e9nones, \u03b1-Aminoalkylph\u00e9nones)<\/p>\n<p>- Oxydes d'acylphosphine (TPO, etc.)<\/p>\n<p>- Benzoph\u00e9nones<\/p>\n<p>- Thioxanthones<\/p>\n<p>Photoinitiateurs cationiques :<\/p>\n<p>- Sels d'onium (sels d'ionium, sels de sulfonium)<\/p>\n<p>- M\u00e9talloorganiques (sels de ferroc\u00e9nium)<\/p>\n<p>- Organosilanes<\/p>\n<p><strong><b>04 Domaines d'application<\/b><\/strong><\/p>\n<p>Les photo-initiateurs sont des composants essentiels de la technologie de durcissement par rayonnement et sont largement utilis\u00e9s :<\/p>\n<p>Vernis UV : vernis pour le bois, le plastique et le m\u00e9tal<\/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\" \/>Encres UV :<\/b><\/strong>\u00a0Industries de l'impression et de l'emballage<\/p>\n<p><strong><b>Adh\u00e9sifs UV :<\/b><\/strong>\u00a0Adh\u00e9sifs pour l'\u00e9lectronique et le m\u00e9dical<\/p>\n<p><strong><b>Vernis en gel :<\/b><\/strong>\u00a0Vernis en gel \u00e0 s\u00e9chage UV\/LED (tel que le vernis en gel de CHROM\u00c9CLAIR) <a href=\"https:\/\/chromeclair.com\/\">Gel Polish sans HEMA<\/a>) pour l'industrie de l'art de l'ongle, offrant une polym\u00e9risation rapide, une haute brillance et une r\u00e9sistance \u00e0 l'abrasion.<\/p>\n<p><strong><b>Autres mat\u00e9riaux photopolym\u00e9risables : <\/b><\/strong>Impression 3D, r\u00e9sine photosensible, etc.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>05 Caract\u00e9ristiques et avantages<\/b><\/strong><\/p>\n<p>La technologie de photopolym\u00e9risation r\u00e9pond aux normes \u00e9cologiques \"5E\" :<\/p>\n<ul>\n<li><strong><b> Efficace :<\/b><\/strong>Cure en quelques secondes<\/li>\n<li><strong><b> Habilitation :<\/b><\/strong>Applicable \u00e0 une vari\u00e9t\u00e9 de substrats<\/li>\n<li><strong><b> \u00c9conomique : <\/b><\/strong>Faible consommation d'\u00e9nergie et grande efficacit\u00e9 de production<\/li>\n<li><strong><b> \u00c9conomie d'\u00e9nergie : <\/b><\/strong>R\u00e9action \u00e0 temp\u00e9rature ambiante, pas de chauffage n\u00e9cessaire<\/li>\n<li><strong><b> Respectueux de l'environnement : <\/b><\/strong>Pas d'\u00e9missions de COV, faible pollution<\/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, 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