{"id":5647,"date":"2022-10-03T12:58:35","date_gmt":"2022-10-03T12:58:35","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5647"},"modified":"2026-04-28T10:42:09","modified_gmt":"2026-04-28T10:42:09","slug":"why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/","title":{"rendered":"Pourquoi est-il n\u00e9cessaire d'ajouter un inhibiteur de polym\u00e9risation aux rev\u00eatements photopolym\u00e9risables ?"},"content":{"rendered":"<h1><strong>Pourquoi est-il n\u00e9cessaire d'ajouter un inhibiteur de polym\u00e9risation aux rev\u00eatements photopolym\u00e9risables ?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>R\u00e9ponse rapide :<\/strong> Le choix du photoinitiateur est g\u00e9n\u00e9ralement dict\u00e9 par la compatibilit\u00e9 avec la lampe, la profondeur de durcissement, le jaunissement et la performance finale du film sur le substrat r\u00e9el. Le meilleur package est rarement le grade unique le moins cher.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>Dans le processus de production des rev\u00eatements, certains types de rev\u00eatements contiennent des substances \u00e0 forte activit\u00e9 de polym\u00e9risation, faciles \u00e0 \u00eatre affect\u00e9es par des facteurs externes et \u00e0 polym\u00e9riser, aux rev\u00eatements photopolym\u00e9risables, par exemple, la composition principale des oligom\u00e8res et des diluants actifs des rev\u00eatements photopolym\u00e9risables est \u00e0 forte activit\u00e9 de polym\u00e9risation des acrylates, une autre composition importante des photo-initiateurs et extr\u00eamement facile \u00e0 produire des radicaux libres ou des cations de substances. Dans un tel syst\u00e8me mixte, il est tr\u00e8s facile de polym\u00e9riser sous l'influence de la lumi\u00e8re et de la chaleur ext\u00e9rieures, il est donc n\u00e9cessaire d'ajouter la bonne quantit\u00e9 d'inhibiteur de polym\u00e9risation. Cet article pr\u00e9sente aux lecteurs les caract\u00e9ristiques et les applications des inhibiteurs de polym\u00e9risation.<\/p>\n<p>L'inhibiteur de polym\u00e9risation emp\u00eache la polym\u00e9risation des additifs. L'inhibiteur de polym\u00e9risation peut mettre fin \u00e0 tous les radicaux libres, de sorte que la r\u00e9action de polym\u00e9risation est compl\u00e8tement arr\u00eat\u00e9e. Les inhibiteurs de polym\u00e9risation couramment utilis\u00e9s sont les ph\u00e9nols, les amines aromatiques, les compos\u00e9s nitr\u00e9s aromatiques, etc. L'oxyg\u00e8ne pr\u00e9sent dans l'air est un bon inhibiteur de polym\u00e9risation, car l'oxyg\u00e8ne est lui-m\u00eame un radical double, tr\u00e8s facile \u00e0 combiner avec les radicaux libres, g\u00e9n\u00e9rant des radicaux peroxydes, l'activit\u00e9 d'initiation est fortement r\u00e9duite, et finalement g\u00e9n\u00e9rant des oligom\u00e8res alternant monom\u00e8res et liaisons peroxydes. Les inhibiteurs de polym\u00e9risation des rev\u00eatements photopolym\u00e9risables sont principalement des ph\u00e9nols, tels que le p-hydroxyanisole, l'hydroquinone et le 2,6-di-tert-butyl-p-cr\u00e9sol. L'ajout d'hydroquinone entra\u00eene parfois un assombrissement de la couleur du syst\u00e8me et n'est donc souvent pas utilis\u00e9. Mais les inhibiteurs de polym\u00e9risation ph\u00e9noliques doivent \u00eatre en pr\u00e9sence d'oxyg\u00e8ne pour montrer l'effet de blocage de la polym\u00e9risation.<\/p>\n<p>En pr\u00e9sence d'inhibiteurs de polym\u00e9risation ph\u00e9nolique, les radicaux peroxydes sont rapidement \u00e9limin\u00e9s afin de garantir une concentration suffisante d'oxyg\u00e8ne dans le syst\u00e8me, ce qui prolonge le temps de blocage. Par cons\u00e9quent, outre l'ajout d'inhibiteurs de polym\u00e9risation ph\u00e9nolique pour am\u00e9liorer la stabilit\u00e9 du stockage, nous devons \u00e9galement pr\u00eater attention au stockage de la peinture dans le r\u00e9cipient, qui ne doit pas \u00eatre trop plein, afin de s'assurer qu'il y a suffisamment d'oxyg\u00e8ne.<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>Un itin\u00e9raire de s\u00e9lection pratique pour les projets li\u00e9s aux photoinitiateurs<\/h2>\n<p>Lorsque les acheteurs techniques ou les formulateurs \u00e9valuent des photoinitiateurs, le cadre de d\u00e9cision le plus utile concerne g\u00e9n\u00e9ralement la qualit\u00e9 de la polym\u00e9risation associ\u00e9e \u00e0 l'ad\u00e9quation \u00e0 l'application : quel paquet polym\u00e9rise de mani\u00e8re fiable, maintient une apparence acceptable et fonctionne toujours sous la lampe, l'\u00e9paisseur du film et les conditions du substrat du processus r\u00e9el.<\/p>\n<ul>\n<li><strong>Associez d'abord le paquet \u00e0 la lampe :<\/strong> Les lampes \u00e0 mercure, les LED UV et les syst\u00e8mes de lumi\u00e8re visible peuvent classer de la m\u00eame mani\u00e8re des photoinitiateurs tr\u00e8s diff\u00e9rents.<\/li>\n<li><strong>V\u00e9rifier la polym\u00e9risation en profondeur et la polym\u00e9risation de surface s\u00e9par\u00e9ment :<\/strong> un film sec en apparence peut \u00eatre faible en dessous.<\/li>\n<li><strong>\u00c9quilibrer le jaunissement avec la r\u00e9activit\u00e9 :<\/strong> La voie de polym\u00e9risation profonde la plus forte n'est pas toujours le meilleur choix commercial si la couleur ou le risque de migration deviennent inacceptables.<\/li>\n<li><strong>Utilisez la formule finale comme r\u00e9f\u00e9rence\u00a0:<\/strong> La charge de pigment, le paquet de monom\u00e8re et l'\u00e9paisseur du film peuvent tous modifier le classement apparent du m\u00eame initiateur.<\/li>\n<\/ul>\n<h3>R\u00e9f\u00e9rences de produits recommand\u00e9es<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/photoinitiator-tpo-l-cas-84434-11-7\/\">CHLUMINIT TPO-L<\/a>:<\/strong> Une r\u00e9f\u00e9rence solide \u00e0 faible jaunissement pour les syst\u00e8mes UV orient\u00e9s LED.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/photoinitiator-819-irgacure-819-cas-162881-26-7\/\">CHLUMINIT 819<\/a>:<\/strong> Utile lorsqu'une formulation n\u00e9cessite une absorption plus forte et un soutien \u00e0 une cure plus profonde.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/photoinitiator-184-cas-947-19-3\/\">CHLUMINIT 184<\/a>:<\/strong> Un crit\u00e8re de r\u00e9f\u00e9rence classique pour le durcissement rapide des surfaces par radicaux libres dans de nombreux syst\u00e8mes UV.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/cas-270586-78-2\/\">CHLUMINIT TMO<\/a>:<\/strong> Un point de comparaison pr\u00e9cieux lorsque des discussions sur le jaunissement inf\u00e9rieur ou le remplacement du TPO sont importantes.<\/li>\n<\/ul>\n<h3>FAQ pour les acheteurs et les formulateurs<\/h3>\n<p><strong>Pourquoi les m\u00e9langes de photoinitiateurs sont-ils si courants ?<\/strong><br \/>Parce qu'un produit peut contr\u00f4ler le jaunissement ou bien s'adapter \u00e0 la lampe, tandis qu'un autre am\u00e9liore la profondeur de durcissement ou les performances en vitesse de ligne, l'ensemble complet est souvent plus performant que n'importe quel grade individuel.<\/p>\n<p><strong>Une polym\u00e9risation incompl\u00e8te doit-elle toujours \u00eatre r\u00e9solue en ajoutant plus d'initiateur ?<\/strong><br \/>Pas automatiquement. La limitation r\u00e9elle peut \u00eatre la lampe, l'\u00e9paisseur du film, la teinte du pigment, ou le reste du syst\u00e8me r\u00e9actif plut\u00f4t qu'un simple sous-dosage.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>In the production process of coatings, some types of coatings contain high polymerization activity of substances, easy to be affected by external factors and polymerization, to light-curing coatings, for example,<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5647","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why is it necessary to add a polymerization inhibitor to light-curing coatings? 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