{"id":5401,"date":"2022-07-23T13:33:09","date_gmt":"2022-07-23T13:33:09","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5401"},"modified":"2022-07-23T13:33:09","modified_gmt":"2022-07-23T13:33:09","slug":"what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations\/","title":{"rendered":"Quais s\u00e3o os elementos na sele\u00e7\u00e3o de olig\u00f4meros UV para formula\u00e7\u00f5es de revestimentos fotopolimeriz\u00e1veis?"},"content":{"rendered":"<h1><strong>Quais s\u00e3o os elementos na sele\u00e7\u00e3o de olig\u00f4meros UV para formula\u00e7\u00f5es de revestimentos fotopolimeriz\u00e1veis?<\/strong><\/h1>\n<p>Os revestimentos de cura por luz tamb\u00e9m s\u00e3o conhecidos como revestimentos de cura por UV, que usam a luz UV como fonte de energia para curar o revestimento. Eles podem ser curados rapidamente em substratos como papel, pl\u00e1stico, couro e madeira sem a necessidade de calor. Os revestimentos fotopolimeriz\u00e1veis s\u00e3o compostos principalmente de resinas fotopolimeriz\u00e1veis (olig\u00f4meros), fotoiniciadores (fotossensibilizadores), diluentes e aditivos. As resinas fotopolimeriz\u00e1veis s\u00e3o geralmente resinas de baixo peso molecular com liga\u00e7\u00f5es insaturadas, como poli\u00e9steres insaturados, olig\u00f4meros acr\u00edlicos, etc. Este artigo discute os elementos de sele\u00e7\u00e3o da resina fotopolimeriz\u00e1vel (olig\u00f4mero) nas formula\u00e7\u00f5es de tintas fotopolimeriz\u00e1veis.<\/p>\n<p>I. Viscosidade.<\/p>\n<p>A escolha de resina de baixa viscosidade pode reduzir a quantidade de diluente ativo. No entanto, a resina de baixa viscosidade geralmente tem baixa massa molecular relativa, o que afeta as propriedades f\u00edsicas e mec\u00e2nicas do filme curado.<\/p>\n<p>Segundo, a taxa de cura da luz.<\/p>\n<p>De modo geral, quanto maior o grau funcional da resina fotopolimeriz\u00e1vel, mais r\u00e1pida \u00e9 a taxa de fotopolimeriza\u00e7\u00e3o, a taxa de fotopolimeriza\u00e7\u00e3o do ep\u00f3xi acrilato \u00e9 r\u00e1pida, a taxa de fotopolimeriza\u00e7\u00e3o do olig\u00f4mero modificado com amina tamb\u00e9m \u00e9 r\u00e1pida. \u00c9 uma condi\u00e7\u00e3o muito importante escolher uma resina com taxa de fotopolimeriza\u00e7\u00e3o r\u00e1pida, que pode n\u00e3o s\u00f3 reduzir a quantidade de fotoiniciador, mas tamb\u00e9m atender aos requisitos de cura r\u00e1pida da linha de revestimento de fotopolimeriza\u00e7\u00e3o.<\/p>\n<p>Terceiro, propriedades f\u00edsicas e mec\u00e2nicas.<\/p>\n<p>As propriedades f\u00edsicas e mec\u00e2nicas do filme de tinta fotopolimeriz\u00e1vel s\u00e3o determinadas principalmente pelo desempenho do filme de cura da resina fotopolimeriz\u00e1vel, e as propriedades f\u00edsicas e mec\u00e2nicas de diferentes variedades de requisitos de tinta fotopolimeriz\u00e1vel s\u00e3o diferentes, e a escolha da resina fotopolimeriz\u00e1vel tamb\u00e9m \u00e9 diferente. As propriedades f\u00edsicas e mec\u00e2nicas do filme de tinta s\u00e3o principalmente os seguintes indicadores.<\/p>\n<p>Dureza, acrilato de ep\u00f3xi e poli\u00e9ster insaturado com dureza geral, olig\u00f4mero contendo estrutura de anel de benzeno tamb\u00e9m contribui para melhorar a dureza. Alta funcionalidade, alta densidade de reticula\u00e7\u00e3o, alta Tg e alta dureza.<\/p>\n<p>Flexibilidade: acr\u00edlicos de uretano, acr\u00edlicos de poli\u00e9ster, acr\u00edlicos de poli\u00e9ter e acr\u00edlicos puros geralmente s\u00e3o mais flex\u00edveis. Os olig\u00f4meros cont\u00eam estruturas alif\u00e1ticas de cadeia de carbono longa e s\u00e3o flex\u00edveis. Quanto maior a massa molecular relativa, melhor a flexibilidade. Baixa densidade de crosslink, boa flexibilidade. Baixa Tg, bom corte flex\u00edvel.<\/p>\n<p>Resist\u00eancia \u00e0 abras\u00e3o, a resina acr\u00edlica de uretano tem boa resist\u00eancia \u00e0 abras\u00e3o. Boa resist\u00eancia \u00e0 abras\u00e3o para olig\u00f4meros com f\u00e1cil forma\u00e7\u00e3o de liga\u00e7\u00f5es de hidrog\u00eanio entre as mol\u00e9culas. Alta densidade de liga\u00e7\u00f5es cruzadas, boa resist\u00eancia \u00e0 abras\u00e3o.<\/p>\n<p>Resist\u00eancia \u00e0 tra\u00e7\u00e3o, acrilatos ep\u00f3xi e poli\u00e9steres insaturados t\u00eam alta resist\u00eancia \u00e0 tra\u00e7\u00e3o, geralmente maior massa molecular relativa, maior polaridade, menor flexibilidade e olig\u00f4meros com maior reticula\u00e7\u00e3o t\u00eam maior resist\u00eancia \u00e0 tra\u00e7\u00e3o.<\/p>\n<p>Resist\u00eancia ao impacto, resinas acr\u00edlicas de uretano, resinas acr\u00edlicas de poli\u00e9ster, resinas acr\u00edlicas de poli\u00e9ter e acr\u00edlicos puros t\u00eam melhor resist\u00eancia ao impacto. Baixa Tg, olig\u00f4meros flex\u00edveis com boa resist\u00eancia ao impacto em geral.<\/p>\n<p>Ades\u00e3o, olig\u00f4meros com baixo encolhimento, boa ades\u00e3o a substratos; olig\u00f4meros contendo grupos como -OH e -COOH t\u00eam boa ades\u00e3o a metais. Olig\u00f4meros com baixa tens\u00e3o superficial, boa umecta\u00e7\u00e3o e espalhamento para substratos, bons para ades\u00e3o.<\/p>\n<p>Resist\u00eancia ao amarelamento: as resinas acr\u00edlicas de poliuretano alif\u00e1tico, as resinas acr\u00edlicas de poli\u00e9ter e os acr\u00edlicos puros t\u00eam boa resist\u00eancia ao amarelamento. A adi\u00e7\u00e3o de agentes antiamarelamento adequados \u00e0 formula\u00e7\u00e3o pode, com frequ\u00eancia, melhorar efetivamente a resist\u00eancia ao amarelamento de revestimentos fotopolimeriz\u00e1veis.<\/p>\n<p>Resist\u00eancia qu\u00edmica: os acrilatos ep\u00f3xi, os acr\u00edlicos de poliuretano e os acr\u00edlicos de poli\u00e9ster t\u00eam boa resist\u00eancia qu\u00edmica, mas os acr\u00edlicos de poli\u00e9ster s\u00e3o menos resistentes a \u00e1lcalis; o aumento da densidade de reticula\u00e7\u00e3o durante a cura aumenta a resist\u00eancia qu\u00edmica do produto.<\/p>\n<p>Brilho, acrilatos de ep\u00f3xi e poli\u00e9steres insaturados t\u00eam alto brilho, a densidade de reticula\u00e7\u00e3o aumenta, o brilho aumenta. Alta Tg, alto \u00edndice de refra\u00e7\u00e3o dos olig\u00f4meros, bom brilho.<\/p>\n<p>Molhabilidade do pigmento, olig\u00f4meros modificados com \u00e1cidos graxos em geral e modificados com amina t\u00eam melhor molhabilidade dos pigmentos, e olig\u00f4meros contendo -OH e -COOH tamb\u00e9m t\u00eam melhor molhabilidade do pigmento.<\/p>\n<p>Quarto, o encolhimento da cura da resina fotopolimeriz\u00e1vel (olig\u00f4mero).<\/p>\n<p>O baixo encolhimento da cura favorece a melhoria da ades\u00e3o do filme curado ao substrato; as funcionalidades do olig\u00f4mero aumentam, a densidade de reticula\u00e7\u00e3o aumenta e o encolhimento da cura tamb\u00e9m aumenta.<\/p>\n<p>Em quinto lugar, a temperatura de transi\u00e7\u00e3o v\u00edtrea do olig\u00f4mero Tg.<\/p>\n<p>Olig\u00f4mero de alta Tg, geralmente de alta dureza, bom brilho; olig\u00f4mero de baixa Tg, boa flexibilidade, resist\u00eancia ao impacto ou.<\/p>\n<p>Sexto, toxicidade e irrita\u00e7\u00e3o.<\/p>\n<p>O olig\u00f4mero, devido \u00e0 massa molecular relativa, \u00e9 maior, a maior parte da resina viscosa, n\u00e3o \u00e9 vol\u00e1til, n\u00e3o \u00e9 inflam\u00e1vel nem explosiva, sua toxicidade tamb\u00e9m \u00e9 baixa e a irrita\u00e7\u00e3o da pele tamb\u00e9m \u00e9 baixa.<\/p>\n<h2><strong>Produtos da mesma s\u00e9rie<\/strong><\/h2>\n<table style=\"border-collapse: collapse; width: 383.27pt;\" border=\"0\" width=\"511\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt; width: 119.25pt;\" width=\"159\" height=\"64\"><a href=\"https:\/\/longchangchemical.com\/pt\/product\/iboma-cas-7534-94-3\/\"><span style=\"color: #00ccff;\"> IBOMA<\/span><\/a><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Metacrilato de isobornila<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">7534-94-3<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"> CTFA<\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Acrilato de (5-etil-1,3-dioxan-5-il)metila<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">66492-51-1<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><a href=\"https:\/\/longchangchemical.com\/pt\/product\/-iboa-cas-5888-33-5\/\"><span style=\"color: #00ccff;\"> IBOA<\/span><\/a><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Acrilato de isobornila<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">5888-33-5<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"https:\/\/longchangchemical.com\/pt\/product\/tpgda-cas-42978-66-5\/\"> TPGDA<\/a><\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Diacrilato de tripropilenoglicol<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">42978-66-5<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"https:\/\/longchangchemical.com\/pt\/product\/peta-cas-3524-68-3\/\"> PETA<\/a><\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Triacrilato de pentaeritritol<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">3524-68-3<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><a href=\"https:\/\/longchangchemical.com\/pt\/product\/tmptma-cas-3290-92-4\/\"><span style=\"color: #00ccff;\"> TMPTMA<\/span><\/a><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Trimetacrilato de trimetilolpropano<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">3290-92-4<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><a href=\"https:\/\/longchangchemical.com\/pt\/product\/-thfa-cas-2399-48-6\/\"><span style=\"color: #00ccff;\"> THFA<\/span><\/a><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Acrilato de tetrahidrofurfurila<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">2399-48-6<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"https:\/\/longchangchemical.com\/pt\/product\/npgda-cas-2223-82-7\/\"> NPGDA<\/a><\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Diacrilato de neopentil glicol<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">2223-82-7<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"> TEGDA<\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Diacrilato de trietilenoglicol<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">1680-21-3<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><a href=\"https:\/\/longchangchemical.com\/pt\/product\/tmpta-cas-15625-89-5\/\"><span style=\"color: #00ccff;\"> TMPTA<\/span><\/a><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Triacrilato de trimetilolpropano<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">15625-89-5<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"https:\/\/longchangchemical.com\/pt\/product\/142-90-5\/\"> LMA<\/a><\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Metacrilato de dodecila \/ Metacrilato de lauril<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">142-90-5<\/td>\n<\/tr>\n<tr style=\"height: 48.00pt;\">\n<td style=\"height: 48.00pt;\" height=\"64\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"https:\/\/longchangchemical.com\/pt\/product\/tegdma-cas-109-16-0\/\"> TEGDMA<\/a><\/span><\/td>\n<td class=\"et4\" style=\"width: 182.25pt;\" width=\"243\">Dimetacrilato de trietilenoglicol<\/td>\n<td class=\"et5\" style=\"width: 81.75pt;\" width=\"109\">109-16-0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><\/h2>\n<h2><strong><b>Entre em contato conosco agora!<\/b><\/strong><\/h2>\n<h4><strong><b>Se precisar de COA, MSDS ou TDS, preencha suas informa\u00e7\u00f5es de contato no formul\u00e1rio abaixo. Normalmente, entraremos em contato em 24 horas. Voc\u00ea tamb\u00e9m pode me enviar um e-mail <span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"mailto:info@longchangchemical.com\">info@longchangchemical.com<\/a><\/span> durante o hor\u00e1rio comercial (das 8h30 \u00e0s 18h UTC+8 de segunda a s\u00e1bado) ou use o bate-papo ao vivo do site para obter uma resposta imediata.<\/b><\/strong><\/h4>","protected":false},"excerpt":{"rendered":"<p>Quais s\u00e3o os elementos na sele\u00e7\u00e3o de olig\u00f4meros UV para formula\u00e7\u00f5es de revestimentos fotopolimeriz\u00e1veis? Os revestimentos de cura por luz tamb\u00e9m s\u00e3o conhecidos como revestimentos de cura por UV, que usam a luz UV como fonte de energia para curar o revestimento. Eles podem ser curados rapidamente em substratos como papel, pl\u00e1stico, couro e madeira sem a necessidade de calor. Os revestimentos de cura por luz [...]<\/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-5401","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>What are the elements in selecting UV oligomers for light-curing coating formulations? - Longchang Chemical<\/title>\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\/what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the elements in selecting UV oligomers for light-curing coating formulations? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"What are the elements in selecting UV oligomers for light-curing coating formulations? 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