{"id":6193,"date":"2023-07-26T02:28:28","date_gmt":"2023-07-26T02:28:28","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6193"},"modified":"2026-04-28T10:42:19","modified_gmt":"2026-04-28T10:42:19","slug":"how-do-leveling-agents-work","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/how-do-leveling-agents-work\/","title":{"rendered":"Como funcionam os agentes de nivelamento?"},"content":{"rendered":"

Como funcionam os agentes de nivelamento?<\/strong><\/h1>\n

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Quick answer:<\/strong> A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.<\/p>\n

<\/p>\n

1. Vis\u00e3o geral do nivelamento<\/p>\n

After the construction of paint, there is a flow and drying film-forming process, and then gradually form a flat, smooth, uniform coating film. Whether the coating film can achieve the characteristics of flat and smooth is called leveling. In the actual construction process of the coating, the film defects that often appear are orange peel, fish-eye, shrinkage, pinhole, shrinkage, Benedict swirl, air sensitivity and due to poor leveling, brush marks when brushing, roller coating roller marks are known as poor leveling, the generation of these phenomena reduces the decorative and protective function of the coating. There are many factors affecting the leveling of coatings, such as solvent volatility gradient and solubility properties, surface tension of coatings, wet film thickness and surface tension gradient, rheology of coatings, construction process and environment, etc., of which the most important factors are the surface tension of coatings, surface tension gradient generated by the wet film in the film-forming process and the surface tension homogenization of the surface layer of the wet film. To improve the leveling of coatings, it is necessary to consider adjusting the formulation and adding suitable additives. In practice, CHLUMILE 3345 Leveling Agent<\/a> e CHLUMILE 3033 Leveling Agent<\/a> are often compared so that the coatings have suitable surface tension and the ability to reduce the surface tension gradient.
\n2. Papel do agente de nivelamento
\nDepois de umedecer o substrato, os aditivos que controlam o fluxo do revestimento para o nivelamento final s\u00e3o chamados de agentes de nivelamento, que podem resolver os seguintes problemas
\n3. Os principais fatores que influenciam o nivelamento
\n3.1. Gradiente de tens\u00e3o superficial - interface l\u00edquido-ar
\nOs gradientes de tens\u00e3o superficial nas camadas interna e externa levam a v\u00f3rtices de Benadryl
\nA elimina\u00e7\u00e3o do gradiente de tens\u00e3o superficial \u00e9 um elemento essencial para obter uma superf\u00edcie nivelada.
\n3.2. Tens\u00e3o superficial - interface l\u00edquido-s\u00f3lido
\nTens\u00e3o superficial menor do que a do substrato, de modo que o revestimento tem melhor molhabilidade do substrato
\nMenor tens\u00e3o superficial do revestimento, o que leva a um melhor nivelamento de ondas longas do l\u00edquido.
\n4. Fatores que influenciam a velocidade de nivelamento
\nQuanto maior a viscosidade, mais lento ser\u00e1 o nivelamento.
\nQuanto mais espessa for a pel\u00edcula, mais r\u00e1pido ser\u00e1 o nivelamento.
\nQuanto maior a tens\u00e3o superficial, mais r\u00e1pido ser\u00e1 o nivelamento.
\n5. Mecanismos e propriedades de diferentes agentes de nivelamento
\n5. 1) Eliminar o gradiente de tens\u00e3o superficial
\n5. 2 Reduzir a tens\u00e3o superficial do sistema.
\nOrganosilicones.
\n-Reduz significativamente a tens\u00e3o superficial
\nOrganosilicones: - Reduzem significativamente a tens\u00e3o superficial - Boas propriedades de migra\u00e7\u00e3o eliminam o gradiente de tens\u00e3o superficial
\nSem silicone e sem fl\u00faor: - Sem redu\u00e7\u00e3o significativa da tens\u00e3o superficial
\n-N\u00e3o h\u00e1 redu\u00e7\u00e3o significativa da tens\u00e3o superficial
\n- Sem migra\u00e7\u00e3o de superf\u00edcie
\n- Orienta\u00e7\u00e3o dentro do revestimento, ajustando a homogeneidade da tens\u00e3o superficial local<\/p>\n

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How buyers usually evaluate coating and ink additives<\/h2>\n

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