{"id":6030,"date":"2023-04-12T14:38:46","date_gmt":"2023-04-12T14:38:46","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6030"},"modified":"2026-04-28T10:42:18","modified_gmt":"2026-04-28T10:42:18","slug":"how-do-levelling-agents-level-the-paint","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/how-do-levelling-agents-level-the-paint\/","title":{"rendered":"Como os agentes de nivelamento nivelam a tinta?"},"content":{"rendered":"<h1><strong>Como os agentes de nivelamento nivelam a tinta?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> Surface-control additives are usually selected by defect type, compatibility, and dosage window. The strongest commercial choice is the one that fixes the real problem without creating a new one.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>1\u3001Defini\u00e7\u00e3o de agente de achatamento<\/p>\n<p>O agente de nivelamento \u00e9 um aditivo de revestimento comum, que pode promover o revestimento no processo de secagem para formar um filme de revestimento plano, liso e uniforme.<\/p>\n<p>2\u3001O princ\u00edpio do nivelamento (mecanismo de migra\u00e7\u00e3o)<\/p>\n<p>Como agente de nivelamento, geralmente \u00e9 necess\u00e1rio atender aos dois pontos a seguir:<\/p>\n<p>2.1, e o sistema tem um certo grau de compatibilidade.<\/p>\n<p>2,2, a tens\u00e3o superficial precisa ser menor do que a do sistema.<\/p>\n<p>Esses dois pontos afetam a migra\u00e7\u00e3o do agente de nivelamento, somente o agente de nivelamento migra espontaneamente para a superf\u00edcie do filme de tinta, o que pode ser chamado de ocorr\u00eancia do efeito de nivelamento. O princ\u00edpio da migra\u00e7\u00e3o tamb\u00e9m se aplica \u00e0 migra\u00e7\u00e3o de outros aditivos.<\/p>\n<p>Princ\u00edpio da migra\u00e7\u00e3o<\/p>\n<p>A migra\u00e7\u00e3o dos agentes de nivelamento segue o \"princ\u00edpio da menor energia\" da f\u00edsica, ou seja, eles fluem espontaneamente de um local de alta energia para um local de baixa energia. Quando a tinta \u00e9 aplicada \u00e0 superf\u00edcie do substrato, duas interfaces s\u00e3o formadas, a \"interface substrato - filme de tinta\" e a \"interface filme de tinta - ar\".<\/p>\n<p>Portanto, a energia total do sistema = (tens\u00e3o superficial do substrato - tens\u00e3o superficial do filme de tinta) + (tens\u00e3o superficial do filme de tinta - tens\u00e3o superficial do ar).<\/p>\n<p>Quando um agente de nivelamento \u00e9 adicionado ao sistema, se o agente de nivelamento migrar para a \"interface ar-filme\", a energia total do sistema = (tens\u00e3o superficial do substrato - tens\u00e3o superficial do filme) + (tens\u00e3o superficial do agente de nivelamento - tens\u00e3o superficial do ar), como a tens\u00e3o superficial do agente de nivelamento &lt; tens\u00e3o superficial do filme, a energia total do sistema \u00e9 reduzida e o processo pode prosseguir espontaneamente.<\/p>\n<p>No entanto, se o agente de nivelamento migrar para a \"interface substrato - filme de tinta\", a energia total do sistema = (tens\u00e3o superficial do substrato - tens\u00e3o superficial do agente de nivelamento) + (tens\u00e3o superficial do filme de tinta - tens\u00e3o superficial do ar), uma vez que a tens\u00e3o superficial do agente de nivelamento &lt; tens\u00e3o superficial do filme de tinta, a energia total do sistema aumenta e o processo n\u00e3o pode prosseguir espontaneamente.<\/p>\n<p>\u00c9 claro que, do ponto de vista da teoria do movimento molecular, quando o agente de nivelamento \u00e9 adicionado ao sistema, devido ao movimento irregular das mol\u00e9culas, haver\u00e1 parte do movimento molecular do agente de nivelamento para a \"interface substrato-filme de tinta\", mas a quantidade dessa parte do agente de nivelamento \u00e9 muito pequena, em compara\u00e7\u00e3o com a quantidade total adicionada pode ser insignificante.<\/p>\n<p>3\u3001O princ\u00edpio do agente de nivelamento de silicone<\/p>\n<p>A estrutura dos agentes niveladores de silicone \u00e9 baseada no \u00f3leo de silicone modificado com poli\u00e9ter mais comum, cuja f\u00f3rmula estrutural pode ser expressa na seguinte f\u00f3rmula:<\/p>\n<p>-(SiO(CH3)2)m-(SiOCH3 (CH2CH2O)x(CH2CHCH3O)y)nR<\/p>\n<p>Em que o segmento de cadeia m indica a parte n\u00e3o modificada do \u00f3leo de silicone, pertence ao segmento de cadeia cuja compatibilidade \u00e9 restrita; o segmento de cadeia n \u00e9 a parte modificada, pertence ao segmento de cadeia compat\u00edvel; x \u00e9 a parte de \u00f3xido de polietileno do segmento de cadeia modificada de poli\u00e9ter; y \u00e9 a parte de \u00f3xido de polietileno do grupo de poli\u00e9ter; os quatro valores de m, n, x, y determinam o desempenho apresentado pelo agente nivelador.<\/p>\n<p>3.1\u3001Compatibilidade: A compatibilidade dos agentes niveladores de silicone depende principalmente do valor de m\/n. Quanto menor o valor de m \/n (ou seja, menor o conte\u00fado de segmentos de cadeia incompat\u00edveis), melhor a compatibilidade, e quanto maior o valor de x\/y sob o valor fixo de m\/n, melhor a compatibilidade, porque a compatibilidade do poli(\u00f3xido de etileno) excede a do poli(\u00f3xido de propileno).<\/p>\n<p>3.2, sensa\u00e7\u00e3o: no caso de valor xy fixo, a sensa\u00e7\u00e3o do agente de nivelamento de silicone tamb\u00e9m depende principalmente do valor de m\/n, quanto maior o valor de m\/n, melhor a sensa\u00e7\u00e3o; o valor de m\/n no mesmo caso, quanto maior o valor absoluto de m, melhor a sensa\u00e7\u00e3o; a partir desse ponto, pode-se ver que, para o agente de nivelamento de silicone, a busca de boa compatibilidade e boa sensa\u00e7\u00e3o \u00e9 muitas vezes uma contradi\u00e7\u00e3o, a fim de alcan\u00e7ar ambos, geralmente m\/n s\u00f3 pode ser selecionado dentro de uma pequena faixa.<\/p>\n<p>3.3, capacidade de nivelamento: os valores de m, n, x, y sobre o impacto do efeito de nivelamento s\u00e3o mais complexos; em geral, os valores de m\/n entre 1 e 2 t\u00eam melhor efeito de nivelamento e, para um valor fixo de m\/n do caso, quanto maior o valor de x + y, melhor o efeito de nivelamento.<\/p>\n<p>3.4, espuma est\u00e1vel: Em geral, no valor x, y usual, m\/n&gt; 3 ou m\/n &lt; 1\/4 pode obter um efeito de espuma basicamente inst\u00e1vel, em termos leigos, \u00e9 quando o teor de sil\u00edcio \u00e9 muito alto ou muito baixo, o agente de nivelamento n\u00e3o \u00e9 uma espuma est\u00e1vel e, se for transformado em variedades com teor de sil\u00edcio muito alto, voc\u00ea poder\u00e1 obter uma sensa\u00e7\u00e3o excelente, uma espuma n\u00e3o est\u00e1vel, mas um agente de nivelamento um pouco menos compat\u00edvel, se o teor de sil\u00edcio for muito baixo, o desempenho do agente de nivelamento for uma compatibilidade muito boa, uma espuma n\u00e3o est\u00e1vel, mas a sensa\u00e7\u00e3o do agente de nivelamento de silicone n\u00e3o for suficiente. 5.<\/p>\n<p>3.5. capacidade de repintura: em geral, quanto maior o valor de m+n e quanto maior o valor de m\/n, maior a probabilidade de problemas de capacidade de repintura; al\u00e9m disso, o tipo de grupo final de poli\u00e9ter, o grupo R, tamb\u00e9m ter\u00e1 impacto na capacidade de repintura.<\/p>\n<p>3.6, a capacidade direcional do p\u00f3 para fosqueamento: de acordo com o teste, a capacidade direcional do p\u00f3 para fosqueamento \u00e9 muito influenciada pelo valor de m\/n e pelo valor absoluto de m. Quanto maior o valor absoluto de m, melhor a capacidade direcional do p\u00f3 para fosqueamento.<\/p>\n<p>Causas<br \/>\nAs superf\u00edcies de pintura s\u00e3o propensas a fen\u00f4menos como encolhimento, casca de laranja, rugosidade da superf\u00edcie e falta de brilho, o que dificulta seriamente a promo\u00e7\u00e3o e a aplica\u00e7\u00e3o de novas tecnologias, como revestimentos em p\u00f3, \u00e0 base de \u00e1gua e de alto teor de s\u00f3lidos. Os agentes de nivelamento s\u00e3o usados em tintas para reduzir esses fen\u00f4menos, tornando a superf\u00edcie do filme de tinta lisa e decorativa.<\/p>\n<p>Para isso, a tens\u00e3o superficial est\u00e1 relacionada.<\/p>\n<p>Tens\u00e3o superficial<br \/>\nEm um l\u00edquido, as for\u00e7as gravitacionais moleculares em qualquer mol\u00e9cula s\u00e3o equilibradas. Mas, na superf\u00edcie do l\u00edquido, a for\u00e7a gravitacional das mol\u00e9culas da fase l\u00edquida sobre as mol\u00e9culas da superf\u00edcie \u00e9 maior do que a for\u00e7a gravitacional das mol\u00e9culas da fase gasosa sobre as mol\u00e9culas da superf\u00edcie e, portanto, h\u00e1 uma atra\u00e7\u00e3o em dire\u00e7\u00e3o ao interior do l\u00edquido, e essa \u00e9 a tens\u00e3o superficial. Quando o agente nivelador \u00e9 adicionado, ele pode flutuar at\u00e9 a superf\u00edcie do filme de tinta para homogeneiz\u00e1-lo, o que \u00e9 um dos mecanismos de nivelamento.<\/p>\n<p>Encolhimento e casca de laranja<br \/>\nA raz\u00e3o para isso \u00e9 que, se a tens\u00e3o superficial do l\u00edquido for diferente em dois pontos da pel\u00edcula de tinta \u00famida, o material da tinta fluir\u00e1 de um ponto para o outro, gerando encolhimento, casca de laranja etc. O agente nivelador acr\u00edlico pode reduzir a tens\u00e3o superficial e a tens\u00e3o interfacial para aumentar a molhabilidade e pode formar uma \u00fanica camada molecular na superf\u00edcie da tinta para garantir que a tens\u00e3o superficial na se\u00e7\u00e3o da superf\u00edcie seja homogeneizada.<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical selection checklist for wetting, leveling, and defoaming additives<\/h2>\n<p>Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.<\/p>\n<ul>\n<li><strong>Start from the defect, not the additive name:<\/strong> wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.<\/li>\n<li><strong>Check compatibility at the intended dosage:<\/strong> the strongest additive can still be the wrong commercial choice if it narrows the process window too much.<\/li>\n<li><strong>Review the stage of use:<\/strong> some products are most useful during grind, while others matter more during let-down, filling, or final application.<\/li>\n<li><strong>Balance cure or film quality with defect control:<\/strong> the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/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<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why does an additive that looks powerful in a beaker sometimes fail in production?<\/strong><br \/>Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.<\/p>\n<p><strong>Should the most aggressive additive always be preferred?<\/strong><br \/>Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.<\/p>\n<p><!-- lc-commercial-end --><\/p>\n<h2><strong><b>Entre em contato conosco agora!<\/b><\/strong><\/h2>\n<p>When paint leveling is the main concern, formulators often compare <a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumile3345-silicone-leveling-agents-wetting-leveling-agents\/\">CHLUMILE 3345 Leveling Agent<\/a> e <a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumile3033-organic-silicone-leveling-agent-automotive-paint-leveling-agent\/\">CHLUMILE 3033 Leveling Agent<\/a> to tune orange peel resistance and surface feel.<\/p>\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>1\u3001Flattening agent definition Leveling agent is a common coating additives, it can promote the coating in the drying process to form a flat, smooth, uniform coating film, different types of<\/p>","protected":false},"author":1,"featured_media":5984,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-6030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uv-light-curing-series"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How do levelling agents level the paint? 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