{"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> A escolha do fotoiniciador geralmente \u00e9 determinada pela compatibilidade com a l\u00e2mpada, profundidade de cura, amarelamento e se o filme final ainda apresenta bom desempenho no substrato real. A melhor op\u00e7\u00e3o raramente \u00e9 a mais barata de um \u00fanico componente.<\/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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