{"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\/pt\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/","title":{"rendered":"Por que \u00e9 necess\u00e1rio adicionar um inibidor de polimeriza\u00e7\u00e3o aos revestimentos fotopolimeriz\u00e1veis?"},"content":{"rendered":"<h1><strong>Por que \u00e9 necess\u00e1rio adicionar um inibidor de polimeriza\u00e7\u00e3o aos revestimentos fotopolimeriz\u00e1veis?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Resposta r\u00e1pida:<\/strong> Photoinitiator choice is usually driven by lamp match, cure depth, yellowing, and whether the final film still performs on the real substrate. The best package is rarely the cheapest single grade.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>No processo de produ\u00e7\u00e3o de revestimentos, alguns tipos de revestimentos cont\u00eam alta atividade de polimeriza\u00e7\u00e3o de subst\u00e2ncias, f\u00e1ceis de serem afetadas por fatores externos e polimeriza\u00e7\u00e3o, para revestimentos fotopolimeriz\u00e1veis, por exemplo, a composi\u00e7\u00e3o principal de olig\u00f4meros de revestimentos fotopolimeriz\u00e1veis e diluentes ativos s\u00e3o de alta atividade de polimeriza\u00e7\u00e3o de acrilatos, outra composi\u00e7\u00e3o importante de fotoiniciadores e extremamente f\u00e1cil de produzir radicais livres ou c\u00e1tions de subst\u00e2ncias. Em um sistema misto como esse, \u00e9 muito f\u00e1cil polimerizar devido \u00e0 influ\u00eancia da luz externa e do calor, portanto, \u00e9 necess\u00e1rio adicionar a quantidade certa de inibidor de polimeriza\u00e7\u00e3o. Este artigo apresenta aos leitores as caracter\u00edsticas e aplica\u00e7\u00f5es dos inibidores de polimeriza\u00e7\u00e3o.<\/p>\n<p>O inibidor de polimeriza\u00e7\u00e3o evita a ocorr\u00eancia de polimeriza\u00e7\u00e3o de aditivos. O inibidor de polimeriza\u00e7\u00e3o pode acabar com todos os radicais livres, de modo que a rea\u00e7\u00e3o de polimeriza\u00e7\u00e3o seja completamente interrompida. Os inibidores de polimeriza\u00e7\u00e3o comumente usados s\u00e3o fen\u00f3is, aminas arom\u00e1ticas, compostos nitro arom\u00e1ticos, etc. O oxig\u00eanio no ar \u00e9 um bom inibidor de polimeriza\u00e7\u00e3o, porque o pr\u00f3prio oxig\u00eanio \u00e9 um radical duplo, muito f\u00e1cil de combinar com radicais livres, gera radicais de per\u00f3xido, a atividade de inicia\u00e7\u00e3o \u00e9 bastante reduzida e, por fim, gera olig\u00f4meros alternados de liga\u00e7\u00e3o de mon\u00f4mero e per\u00f3xido. Os inibidores de polimeriza\u00e7\u00e3o de revestimentos fotopolimeriz\u00e1veis s\u00e3o usados principalmente fen\u00f3is, como p-hidroxianisol, hidroquinona e 2,6-di-terc-butil-p-cresol. Devido \u00e0 adi\u00e7\u00e3o de hidroquinona, que \u00e0s vezes causa o escurecimento da cor do sistema, geralmente n\u00e3o \u00e9 usada. Mas os inibidores de polimeriza\u00e7\u00e3o fen\u00f3licos devem estar na presen\u00e7a de oxig\u00eanio para mostrar o efeito de bloqueio da polimeriza\u00e7\u00e3o.<\/p>\n<p>Na presen\u00e7a de inibidores de polimeriza\u00e7\u00e3o fen\u00f3lica, os radicais de per\u00f3xido s\u00e3o rapidamente eliminados para garantir que haja concentra\u00e7\u00e3o suficiente de oxig\u00eanio no sistema, prolongando o tempo de bloqueio. Portanto, al\u00e9m da adi\u00e7\u00e3o de inibidores de polimeriza\u00e7\u00e3o fen\u00f3lica para melhorar a estabilidade do armazenamento, tamb\u00e9m devemos prestar aten\u00e7\u00e3o ao armazenamento da tinta no recipiente, que n\u00e3o pode estar muito cheio, para garantir que haja oxig\u00eanio suficiente.<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>Uma rota de sele\u00e7\u00e3o pr\u00e1tica para projetos relacionados a fotoiniciadores<\/h2>\n<p>Ao avaliar fotoiniciadores, os compradores t\u00e9cnicos ou formuladores geralmente consideram a qualidade da cura e a adequa\u00e7\u00e3o \u00e0 aplica\u00e7\u00e3o: qual embalagem cura de forma confi\u00e1vel, mant\u00e9m uma apar\u00eancia aceit\u00e1vel e ainda funciona sob as condi\u00e7\u00f5es da l\u00e2mpada, espessura do filme e substrato do processo real.<\/p>\n<ul>\n<li><strong>Primeiro, compare a embalagem com a l\u00e2mpada:<\/strong> L\u00e2mpadas de merc\u00fario, LEDs UV e sistemas de luz vis\u00edvel podem classificar os mesmos fotoiniciadores de maneiras muito diferentes.<\/li>\n<li><strong>Verifique a cura em profundidade e a cura superficial separadamente:<\/strong> Uma pel\u00edcula que parece seca na superf\u00edcie ainda pode estar fr\u00e1gil por baixo.<\/li>\n<li><strong>Equilibre o amarelamento com a reatividade:<\/strong> O m\u00e9todo de cura profunda mais eficaz nem sempre \u00e9 a melhor op\u00e7\u00e3o comercial se o risco de migra\u00e7\u00e3o ou altera\u00e7\u00e3o da cor se tornar inaceit\u00e1vel.<\/li>\n<li><strong>Utilize a f\u00f3rmula final como refer\u00eancia:<\/strong> A quantidade de pigmento, o pacote de mon\u00f4meros e a espessura do filme podem alterar a classifica\u00e7\u00e3o aparente do mesmo iniciador.<\/li>\n<\/ul>\n<h3>Refer\u00eancias de produtos recomendadas<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/photoinitiator-tpo-l-cas-84434-11-7\/\">CHLUMINIT TPO-L<\/a>:<\/strong> Uma excelente refer\u00eancia de baixo amarelamento para sistemas UV orientados a LEDs.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/photoinitiator-819-irgacure-819-cas-162881-26-7\/\">CHLUMINIT 819<\/a>:<\/strong> \u00datil quando uma f\u00f3rmula necessita de maior absor\u00e7\u00e3o e suporte \u00e0 cura mais profunda.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/photoinitiator-184-cas-947-19-3\/\">CHLUMINIT 184<\/a>:<\/strong> Um padr\u00e3o cl\u00e1ssico de radicais livres para cura r\u00e1pida de superf\u00edcies em muitos sistemas UV.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/cas-270586-78-2\/\">CHLUMINIT TMO<\/a>:<\/strong> Um ponto de compara\u00e7\u00e3o valioso quando se trata de menor amarelamento ou discuss\u00f5es sobre a substitui\u00e7\u00e3o do TPO.<\/li>\n<\/ul>\n<h3>FAQ para compradores e formuladores<\/h3>\n<p><strong>Por que os pacotes de fotoiniciadores misturados s\u00e3o t\u00e3o comuns?<\/strong><br \/>Como um produto pode controlar o amarelamento ou o encaixe da l\u00e2mpada, enquanto outro melhora a profundidade de cura ou o desempenho da velocidade da linha, o pacote completo costuma ser mais eficaz do que qualquer produto individual.<\/p>\n<p><strong>A cura incompleta deve sempre ser resolvida adicionando mais iniciador?<\/strong><br \/>N\u00e3o automaticamente. A verdadeira limita\u00e7\u00e3o pode estar na l\u00e2mpada, na espessura do filme, na tonalidade do pigmento ou no restante do sistema reativo, e n\u00e3o simplesmente em uma subdosagem.<\/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? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"In the production process of coatings, some types of coatings contain high polymerization activity of substances, easy to be affected by external factor...\" \/>\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\/pt\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why is it necessary to add a polymerization inhibitor to light-curing coatings? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"In the production process of coatings, some types of coatings contain high polymerization activity of substances, easy to be affected by external factor...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/longchangchemical.com\/pt\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\" \/>\n<meta property=\"og:site_name\" content=\"Longchang Chemical\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-03T12:58:35+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-28T10:42:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/02\/logo-jpeg.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Longchang Chemical\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/longchangchemical.com\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/longchangchemical.com\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\"},\"author\":{\"name\":\"Longchang Chemical\",\"@id\":\"https:\/\/longchangchemical.com\/#\/schema\/person\/ecb1ad846136c6f1ca534b62978c6a8e\"},\"headline\":\"Why is it necessary to add a polymerization inhibitor to light-curing coatings?\",\"datePublished\":\"2022-10-03T12:58:35+00:00\",\"dateModified\":\"2026-04-28T10:42:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/longchangchemical.com\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\"},\"wordCount\":617,\"publisher\":{\"@id\":\"https:\/\/longchangchemical.com\/#organization\"},\"articleSection\":[\"Catalysts &amp; Chemical Auxiliary Agents\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/longchangchemical.com\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\",\"url\":\"https:\/\/longchangchemical.com\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\",\"name\":\"Why is it necessary to add a polymerization inhibitor to light-curing coatings? 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