{"id":8187,"date":"2025-04-08T09:02:33","date_gmt":"2025-04-08T09:02:33","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=8187"},"modified":"2026-04-28T10:42:52","modified_gmt":"2026-04-28T10:42:52","slug":"how-to-efficiently-select-oligomers-resins","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/how-to-efficiently-select-oligomers-resins\/","title":{"rendered":"Formula\u00e7\u00e3o de revestimento UV: Como selecionar eficientemente os olig\u00f4meros (resinas)"},"content":{"rendered":"<h2><b>Revestimento UV<\/b><b> Formula\u00e7\u00e3o: Como selecionar eficientemente<\/b><b> olig\u00f4meros<\/b><b> (resinas)<\/b><\/h2>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> For UV monomer and resin selection, the key commercial question is not \u201cwhich material is best in general\u201d but \u201cwhich package delivers the right balance of flow, cure, adhesion, and durability in the real application.\u201d<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p><b>A fun\u00e7\u00e3o dos olig\u00f4meros nos revestimentos UV<\/b><\/p>\n<p>Olig\u00f4mero: Os olig\u00f4meros, tamb\u00e9m conhecidos como pr\u00e9-pol\u00edmeros, s\u00e3o usados em revestimentos fotopolimeriz\u00e1veis. Nos anos anteriores, eles eram traduzidos como olig\u00f4meros. Suas principais caracter\u00edsticas s\u00e3o: peso molecular pequeno, grupo de polimeriza\u00e7\u00e3o caracter\u00edstico e alta viscosidade. Os olig\u00f4meros s\u00e3o o corpo principal e o esqueleto dos revestimentos fotopolimeriz\u00e1veis (muitas das propriedades f\u00edsicas e qu\u00edmicas do filme de revestimento).<\/p>\n<p><b>Caracter\u00edsticas da rea\u00e7\u00e3o de cura UV<\/b><\/p>\n<p>A cura por UV \u00e9 uma rea\u00e7\u00e3o de polimeriza\u00e7\u00e3o de adi\u00e7\u00e3o entre mol\u00e9culas insaturadas. De acordo com o mecanismo de inicia\u00e7\u00e3o do iniciador, h\u00e1 polimeriza\u00e7\u00e3o de radical livre e polimeriza\u00e7\u00e3o cati\u00f4nica. No entanto, a polimeriza\u00e7\u00e3o que mais estudamos \u00e9 a polimeriza\u00e7\u00e3o de radical livre (esta aula \u00e9 baseada na polimeriza\u00e7\u00e3o de radical livre). Essa estrutura com liga\u00e7\u00f5es cruzadas C-C na extremidade \u00e9 uma liga\u00e7\u00e3o cruzada r\u00edgida.<\/p>\n<p><b>Mecanismo de polimeriza\u00e7\u00e3o<\/b><\/p>\n<p>A polimeriza\u00e7\u00e3o radical tem as seguintes caracter\u00edsticas: rea\u00e7\u00e3o r\u00e1pida; grande encolhimento; pequena altera\u00e7\u00e3o no grau de polimeriza\u00e7\u00e3o; e um alto grau de influ\u00eancia dos inibidores de polimeriza\u00e7\u00e3o (0,01-0,1% do inibidor pode interromper a rea\u00e7\u00e3o).<\/p>\n<p>O efeito mais prejudicial aos revestimentos \u00e9 o encolhimento. De acordo com a pesquisa de W.J. Bailey e outros, se o tempo entre a despolimeriza\u00e7\u00e3o das liga\u00e7\u00f5es duplas for longo e a polimeriza\u00e7\u00e3o ocorrer para formar liga\u00e7\u00f5es covalentes, o espa\u00e7amento ser\u00e1 reduzido, causando uma diminui\u00e7\u00e3o no volume. O encolhimento de todas as liga\u00e7\u00f5es duplas polimerizadas insaturadas \u00e9 t\u00e3o alto quanto 11%.<\/p>\n<p><b>A complexidade das formula\u00e7\u00f5es de revestimentos UV<\/b><\/p>\n<p>1. H\u00e1 muitos tipos de mon\u00f4meros<\/p>\n<p>2. H\u00e1 muitos tipos de olig\u00f4meros b\u00e1sicos (resinas). Atualmente, eles s\u00e3o classificados de acordo com os grupos funcionais durante a s\u00edntese: PE \u00e0 base de poli\u00e9ster insaturado, EA \u00e0 base de ep\u00f3xi, PUA \u00e0 base de poliuretano, PEA \u00e0 base de poli\u00e9ster, \u00e0 base de amino, \u00e0 base de poli\u00e9ter, \u00e0 base de silicone, \u00e0 base de fosfato e tipos h\u00edbridos.<\/p>\n<p><b>Uma breve introdu\u00e7\u00e3o \u00e0s resinas comumente usadas em revestimentos UV, classificadas de acordo com suas fun\u00e7\u00f5es<\/b><\/p>\n<p><b>Resinas duras - alta Tg<\/b><\/p>\n<p>alta dureza, boa resist\u00eancia qu\u00edmica e velocidade de cura r\u00e1pida para a maioria dos<\/p>\n<p>1. Bisfenol A padr\u00e3o tipo EA;<\/p>\n<p>2. PUA de alta fun\u00e7\u00e3o e 2fPUA de pequeno peso molecular;<\/p>\n<p>3. Aminoacrilato de alta fun\u00e7\u00e3o;<\/p>\n<p>4. Olig\u00f4mero de metacrilato.<\/p>\n<p><b>Resina macia - Tg pequena<\/b><\/p>\n<p>boa flexibilidade, baixa velocidade de cura e baixa densidade de reticula\u00e7\u00e3o.<\/p>\n<p>1. Ep\u00f3xi modificado - ep\u00f3xi acrilato de \u00f3leo de soja, etc;<\/p>\n<p>2. Acrilato de poli\u00e9ster de cadeia longa;<\/p>\n<p>3. PUA com uma estrutura de cadeia linear e uma fra\u00e7\u00e3o de massa superior a 1200;<\/p>\n<p>4. Alguns olig\u00f4meros de acrilato puro<\/p>\n<p><b>Resinas polares<\/b><\/p>\n<p>Olig\u00f4meros que cont\u00eam hidrog\u00eanio ativo ou que formam facilmente liga\u00e7\u00f5es de hidrog\u00eanio, alterando a polaridade ou a tens\u00e3o superficial<\/p>\n<p>1. Acrilato de \u00e9ster de fosfato<\/p>\n<p>2. Olig\u00f4meros de silicone - especialmente<\/p>\n<p>3. olig\u00f4meros de acrilato de carboxila<\/p>\n<p><b>Olig\u00f4meros UV \u00e0 base de \u00e1gua<\/b><\/p>\n<p>Tipo de emuls\u00e3o, tipo dispers\u00edvel em \u00e1gua, tipo sol\u00favel em \u00e1gua<\/p>\n<p>1. tipo de poliuretano - o tipo principal;<\/p>\n<p>2. Tipo ep\u00f3xi acrilato;<\/p>\n<p>3. Tipo de acrilato de poli\u00e9ster.<\/p>\n<p><b>Aplica\u00e7\u00e3o de resinas sem reticula\u00e7\u00e3o em UV<\/b><\/p>\n<p>Efeito de preenchimento, melhorando a densidade da liga\u00e7\u00e3o cruzada, aumentando a ades\u00e3o, alterando a flexibilidade, melhorando a molhabilidade e outros efeitos auxiliares<\/p>\n<p>1. resinas alqu\u00eddicas de \u00f3leo longo;<\/p>\n<p>2. resinas termopl\u00e1sticas de acrilato;<\/p>\n<p>3. resinas de alde\u00eddo-cetona;<\/p>\n<p>4. resinas de petr\u00f3leo, etc.<\/p>\n<p><b>Como projetar uma f\u00f3rmula de revestimento UV Como escolher uma resina<\/b><\/p>\n<p>Antes de criar uma f\u00f3rmula de revestimento, voc\u00ea deve ter clareza sobre<\/p>\n<p>1. os tipos de revestimentos no processo de revestimento - identificar primers, topcoats e tintas;<\/p>\n<p>2. compreender as propriedades b\u00e1sicas do material a ser revestido - polaridade (tens\u00e3o superficial), cristalinidade, termopl\u00e1stico ou termofixo;<\/p>\n<p><b>Sele\u00e7\u00e3o da resina de primer<\/b><\/p>\n<p>1. Requisitos de ades\u00e3o: Essa \u00e9 a propriedade geral das resinas de primer. Em termos relativos, a ades\u00e3o mais dif\u00edcil atualmente inclui<\/p>\n<p>A. Vidro - escolha olig\u00f4meros de metacrilato e resinas n\u00e3o formadoras de filme e algumas resinas polares especiais - sistemas de mercapto siloxano (mas a resist\u00eancia \u00e0 \u00e1gua \u00e9 atualmente uma barreira para a formula\u00e7\u00e3o);<\/p>\n<p>B. Metal: Fa\u00e7a a distin\u00e7\u00e3o entre os tipos de metal. No setor de tintas, o m\u00e9todo b\u00e1sico para melhorar a ades\u00e3o ao metal \u00e9 destruir as liga\u00e7\u00f5es cruzadas. O padr\u00e3o internacional \u00e9 a fosfatiza\u00e7\u00e3o. O m\u00e9todo UV mais comum \u00e9 a combina\u00e7\u00e3o de fosfatos com alguns acr\u00edlicos.<\/p>\n<p>C. Pl\u00e1sticos (incluindo papel plastificado e outros tipos de acabamentos de pintura), que atualmente \u00e9 uma categoria relativamente grande e particularmente complexa, principalmente devido \u00e0 estrutura complexa dos pl\u00e1sticos, \u00e0s v\u00e1rias formas cristalinas e \u00e0s diferentes tens\u00f5es superficiais, o que torna relativamente dif\u00edcil trabalhar com pl\u00e1sticos como BMC, PET e PP. N\u00e3o existe uma f\u00f3rmula unificada que possa ser usada para todos. De modo geral, uma combina\u00e7\u00e3o de PUA macio, acr\u00edlico puro e algumas resinas n\u00e3o formadoras de filme e resinas polares pode ter um certo efeito. No entanto, deve-se prestar aten\u00e7\u00e3o \u00e0 resist\u00eancia qu\u00edmica e \u00e0 \u00e1gua ao combinar as resinas relevantes.<\/p>\n<p>D. Produtos de madeira oleosa: Atualmente, s\u00e3o principalmente alguns tipos de s\u00e2ndalo duro, como kronox, s\u00e2ndalo vermelho, amoreira de caule verde e madeira de okapi, etc. A ades\u00e3o do \u00f3leo de madeira \u00e9 relativamente dif\u00edcil. H\u00e1 poucos casos de UV puro no mercado que podem selar o \u00f3leo. Voc\u00ea pode primeiro sel\u00e1-lo com PU e depois aplicar um primer de ades\u00e3o UV. A ades\u00e3o pode ser obtida principalmente com o uso de algumas resinas polares ou mon\u00f4meros e resinas de enchimento.<\/p>\n<p>2. Umedecimento: A umecta\u00e7\u00e3o do pigmento e da carga e a umecta\u00e7\u00e3o do substrato s\u00e3o duas fun\u00e7\u00f5es diferentes, pois n\u00e3o \u00e9 poss\u00edvel garantir que a tens\u00e3o superficial do substrato seja exatamente a mesma do pigmento e da carga.<\/p>\n<p>A. O umedecimento do pigmento e da carga pode garantir a estabilidade de armazenamento da tinta e a transpar\u00eancia da compatibilidade do filme; por exemplo, alguns PUAs, PEAs e acrilatos de \u00f3leo de soja ep\u00f3xi t\u00eam esse efeito;<\/p>\n<p>B. O umedecimento do substrato, como resinas amino e PEA, tem um efeito melhor.<\/p>\n<p>3. Flexibilidade: relacionada \u00e0 capacidade de lixar e \u00e0 ades\u00e3o entre camadas.<\/p>\n<p>Em geral, o EA padr\u00e3o, alguns PEA e alguns mon\u00f4meros s\u00e3o usados para coordenar a flexibilidade, ajustando, assim, a capacidade de lixar e a ades\u00e3o entre camadas.<\/p>\n<p>Atualmente, o mercado tamb\u00e9m conta com primers de endurecimento que enfatizam a dureza - preste aten\u00e7\u00e3o \u00e0 cura da resina dura e \u00e0 quantidade de revestimento aplicado, caso contr\u00e1rio, a pel\u00edcula de tinta poder\u00e1 estourar;<\/p>\n<p>O mercado tamb\u00e9m exige os chamados primers flex\u00edveis - use resinas mais flex\u00edveis, de prefer\u00eancia PUAs \u00e0 base de poli\u00e9ster. As resinas \u00e0 base de poli\u00e9ter n\u00e3o s\u00e3o muito flex\u00edveis e t\u00eam m\u00f3dulo mec\u00e2nico insuficiente.<\/p>\n<p><b>Sele\u00e7\u00e3o de resinas de acabamento<\/b><\/p>\n<p>1. plenitude e nivelamento<\/p>\n<p>Para isso, \u00e9 preciso escolher uma resina e um mon\u00f4mero com boa compatibilidade, melhorar a umecta\u00e7\u00e3o e o nivelamento com o primer, aumentar adequadamente o grau de reticula\u00e7\u00e3o e usar uma resina com \u00edndice de refra\u00e7\u00e3o mais alto.<\/p>\n<p>Geralmente, s\u00e3o usados PUAs altamente funcionais e resinas amino, com o EA padr\u00e3o como a resina principal.<\/p>\n<p>2. Resist\u00eancia (dureza e resist\u00eancia ao desgaste):<\/p>\n<p>Essas duas propriedades do filme est\u00e3o intimamente relacionadas, mas n\u00e3o s\u00e3o necessariamente id\u00eanticas.<\/p>\n<p>Dureza: Al\u00e9m do trabalho tradicional em madeira com uma pel\u00edcula espessa de 80-120Unm e alguns revestimentos espessos em spray, grande parte da dureza, nesse caso, n\u00e3o vem da pel\u00edcula em si, mas de outras fontes. Deve-se dar aten\u00e7\u00e3o suficiente a parte dessa dureza aparente, como o substrato, o primer, a sensa\u00e7\u00e3o da superf\u00edcie etc. Um exemplo t\u00edpico \u00e9 o acabamento do rolo e a pulveriza\u00e7\u00e3o fina, que podem ser melhorados com o uso de algumas resinas de silicone ou aditivos de silicone, al\u00e9m das resinas de alto n\u00edvel mencionadas anteriormente.<\/p>\n<p>Resist\u00eancia ao desgaste: Em geral, o PUA \u00e9 melhor do que outras resinas. As liga\u00e7\u00f5es de hidrog\u00eanio proporcionam alguma tenacidade para aumentar a resist\u00eancia ao desgaste. Entretanto, a resist\u00eancia ao desgaste de revestimentos finos n\u00e3o pode ser resolvida por resinas.<\/p>\n<p>3. Ades\u00e3o entre camadas<\/p>\n<p>Resolva os problemas de umedecimento, nivelamento e correspond\u00eancia de polaridade da resina, e a ades\u00e3o entre camadas pode ser resolvida. Em casos especiais, algumas resinas de metacrilato podem ser selecionadas.<\/p>\n<p>4. Resist\u00eancia qu\u00edmica<\/p>\n<p>O EA e o PUA (poli\u00e9ster) t\u00eam boa resist\u00eancia qu\u00edmica, enquanto o PE e o poli\u00e9ter s\u00e3o menos resistentes<\/p>\n<p>5, resist\u00eancia ao amarelamento<\/p>\n<p>Em geral, acredita-se atualmente que o PUA alif\u00e1tico, o poli\u00e9ter acrilato puro, o acr\u00edlico puro e os grupos amino t\u00eam uma resist\u00eancia ao amarelamento muito boa. O primeiro tipo \u00e9 o mais comumente usado, mas a resist\u00eancia ao amarelamento n\u00e3o \u00e9 a melhor. Os dois \u00faltimos tipos s\u00e3o menos usados porque n\u00e3o t\u00eam certas propriedades, mas o grupo amino tem a melhor resist\u00eancia geral ao amarelamento.<\/p>\n<p>6. Tipo fosco<\/p>\n<p>Atualmente, algumas resinas com peso molecular um pouco menor ou at\u00e9 mesmo grandes s\u00e3o eficazes, e alguns poliuretanos tamb\u00e9m s\u00e3o muito eficazes (atualmente, h\u00e1 um poliuretano bifuncional com boa dureza no mercado que \u00e9 competitivo).<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical sourcing and formulation view of UV monomers and oligomers<\/h2>\n<p>Most successful UV formulations are built by choosing the backbone first and then tuning the reactive monomer package around the substrate, cure method, and end-use stress. That usually produces a more stable result than choosing materials by viscosity or price alone.<\/p>\n<ul>\n<li><strong>Start from the final property target:<\/strong> hardness, flexibility, adhesion, and shrinkage rarely point to exactly the same raw-material package.<\/li>\n<li><strong>Screen the reactive package as a whole:<\/strong> oligomer, monomer, and photoinitiator choices interact strongly in UV systems.<\/li>\n<li><strong>Use viscosity as a tool, not the only decision rule:<\/strong> the easiest-processing material is not always the one that performs best after cure.<\/li>\n<li><strong>Check the real substrate:<\/strong> plastic, metal, label film, gel systems, and coatings can reward very different polarity and cure-density balances.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/tmpta-cas-15625-89-5\/\">CHLUMICRYL TMPTA<\/a>:<\/strong> A standard reactive monomer benchmark when stronger crosslink density is required.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/eo3-tmpta-cas-28961-43-5\/\">CHLUMICRYL EO3-TMPTA<\/a>:<\/strong> Helpful when viscosity and cure behavior need to be tuned around the base package.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiwe-3071-organic-silicone-surfactant-organosilicone-wetting-agent\/\">CHLUMIWE 3071<\/a>:<\/strong> Useful when organosilicone wetting support is needed in a broad application screen.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Can one UV monomer or resin solve every formulation problem?<\/strong><br \/>Usually no. Commercially strong formulas depend on how several components work together to balance cure, adhesion, flow, and durability.<\/p>\n<p><strong>Why should monomers be screened together with oligomers?<\/strong><br \/>Because monomers can change viscosity, cure rate, shrinkage, and substrate behavior enough to alter the final ranking of the same backbone resin.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>The role of oligomers in UV coatings Oligomer: Oligomers, also known as prepolymers, are used in light-curing coatings. In earlier years, they were translated as oligomers. 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