{"id":6093,"date":"2023-05-16T13:27:50","date_gmt":"2023-05-16T13:27:50","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6093"},"modified":"2026-04-28T10:42:18","modified_gmt":"2026-04-28T10:42:18","slug":"how-to-choose-antioxidant","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/how-to-choose-antioxidant\/","title":{"rendered":"Como escolher o antioxidante?"},"content":{"rendered":"<h1><strong>Como escolher o antioxidante?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> For antioxidant, UV absorber, and HALS topics, formulators usually compare long-term protection, process stability, and color control together because those priorities do not always point to the same additive.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>In the selection of antioxidants to pay attention to the cooperation between antioxidants, antioxidants and other heat, light stabilizers, etc.. Then it is necessary to think about the antioxidant with the most, most antioxidants have a most suitable concentration scale. Within this scale, followed by the amount of antioxidants, antioxidant effectiveness added to the maximum. Beyond this scale, it will bring adverse effects. The amount of antioxidant depends on the nature of the plastic, the power of the antioxidant, synergistic effect, the conditions of use of the product and the cost of the offer and many other factors. Usually amine antioxidant activity than phenolic antioxidants, so there should be greater antioxidant function, but the former in the air under the effect of oxygen and light will change color, itself is mostly colored, and toxic, so the use in plastics to be careful. In commercial formulations, <a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiao-1010-cas-6683-19-8\/\">Antioxidante 1010<\/a> is often paired with <a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiao-168-cas-31570-04-4\/\">Antioxidant 168<\/a> to balance long-term stability and processing protection. Now the primary consideration of antioxidant cooperation.<\/p>\n<p>(l) adi\u00e7\u00e3o e efeito.<\/p>\n<p>O uso de uma variedade de antioxidantes pode promover suas respectivas caracter\u00edsticas e efeitos, aumentando o efeito total. Por exemplo, as diferentes resist\u00eancias de evapora\u00e7\u00e3o ou espaciais dos fen\u00f3is impedidos, quando usados, podem promover seu efeito antioxidante em uma ampla faixa de temperaturas, aumentando o efeito. Se na f\u00f3rmula for usado apenas um tipo de antioxidante, \u00e9 inevit\u00e1vel que ele participe em uma quantidade maior, o que causar\u00e1 rea\u00e7\u00f5es de oxida\u00e7\u00e3o intensas em altas concentra\u00e7\u00f5es, o que n\u00e3o \u00e9 permitido. No entanto, a escolha de v\u00e1rias concentra\u00e7\u00f5es baixas de antioxidantes e seu uso n\u00e3o apenas alcan\u00e7am a inten\u00e7\u00e3o desejada, mas tamb\u00e9m evitam a oxida\u00e7\u00e3o intensa e mant\u00eam seu efeito aditivo.<\/p>\n<p>(2) Efeito sin\u00e9rgico.<\/p>\n<p>Quando duas atividades diferentes do antioxidante principal s\u00e3o usadas, a alta atividade do antioxidante para fornecer \u00e1tomos de hidrog\u00eanio, de modo que a oxida\u00e7\u00e3o da cadeia ativa seja interrompida; e a baixa atividade do antioxidante pode fornecer a alta atividade do antioxidante para fornecer \u00e1tomos de hidrog\u00eanio, de modo que ele se regenere e desenvolva um efeito antioxidante duradouro, de modo que o efeito antioxidante seja muito bom.<\/p>\n<p>Quando os antioxidantes principais e auxiliares s\u00e3o usados, deve-se prestar aten\u00e7\u00e3o ao desenvolvimento de efeitos sin\u00e9rgicos. Por exemplo, o antioxidante principal simplesmente fornece \u00e1tomos de hidrog\u00eanio, os \u00e1tomos de hidrog\u00eanio podem transformar os radicais livres de per\u00f3xido em hidroper\u00f3xidos, interrompendo a rea\u00e7\u00e3o em cadeia; em seguida, os hidroper\u00f3xidos e o efeito do agente divisor de per\u00f3xido antioxidante auxiliar geram produtos de estabiliza\u00e7\u00e3o inativos. Dessa forma, a velocidade das rea\u00e7\u00f5es de oxida\u00e7\u00e3o \u00e9 bastante reduzida, o que aumenta o efeito antioxidante. Um exemplo disso \u00e9 a poliolefina amplamente utilizada no sistema antioxidante 264 e DLPT.<\/p>\n<p>\u2462Uma mol\u00e9cula antioxidante tem duas ou mais fun\u00e7\u00f5es estabilizadoras diferentes, o que \u00e9 dito desde o efeito sin\u00e9rgico, como o antioxidante fen\u00f3lico impedido contendo enxofre, que tem um agente de diferencia\u00e7\u00e3o de per\u00f3xido e de interrup\u00e7\u00e3o da rea\u00e7\u00e3o em cadeia do efeito de duas camadas, esse antioxidante pode fortalecer o efeito antioxidante, \u00e9 um antioxidante mais desej\u00e1vel.<\/p>\n<p>O antioxidante \u2463 e o estabilizador de calor e luz devem ser selecionados para ter um efeito sin\u00e9rgico e se esfor\u00e7ar para evitar efeitos opostos. Como a maioria dos antioxidantes am\u00ednicos e fen\u00f3licos, a presen\u00e7a de negro de fumo reduziu significativamente a efic\u00e1cia do efeito oposto, o que pode ser devido ao fato de o negro de fumo catalisar diretamente a oxida\u00e7\u00e3o dos antioxidantes, esgotando parte do antioxidante causado por ele. O antioxidante ligado ao tio\u00e9ter e o negro de fumo t\u00eam um efeito sin\u00e9rgico. Portanto, o primeiro deve ser abandonado e o segundo deve ser usado.<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical selection route for antioxidant, UV absorber, and HALS packages<\/h2>\n<p>Most stabilizer decisions work best when they are treated as package decisions rather than single-product decisions. Technical buyers usually get the strongest answer by reviewing long-term heat aging, process stability, weather exposure, and color sensitivity together.<\/p>\n<ul>\n<li><strong>Separate processing protection from long-term stability:<\/strong> the best additive for melt history is not always the same one that gives the best service-life retention.<\/li>\n<li><strong>Use synergy deliberately:<\/strong> many polymer and coating systems perform best when primary and secondary stabilizers are paired intentionally.<\/li>\n<li><strong>Review color and clarity requirements:<\/strong> clear, pale, food-contact, or white systems often need a tighter package than dark industrial products.<\/li>\n<li><strong>Check the real aging condition:<\/strong> heat, UV, humidity, and outdoor exposure can each change which stabilizer route is commercially strongest.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> A widely used primary antioxidant benchmark for long-term thermal stability.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> A practical process-stability reference when hydroperoxide control matters.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiao-1076-cas-2082-79-3\/\">CHLUMIAO 1076<\/a>:<\/strong> A familiar phenolic-antioxidant benchmark when balancing efficiency and formulation fit.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/light-stabilizer-123-tinuvin-123-cas-129757-67-1\/\">CHLUMILS UV-123<\/a>:<\/strong> A strong HALS reference for weatherability-focused screens in coatings and polymers.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why are stabilizer packages often stronger than a single additive?<\/strong><br \/>Because different products can protect different parts of the degradation pathway, so the package often covers more risk than one grade alone.<\/p>\n<p><strong>Does adding more antioxidant or UV stabilizer always improve performance?<\/strong><br \/>Not necessarily. Over-dosing can increase cost and sometimes create side effects, so most systems perform best inside a tested dosage window.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>In the selection of antioxidants to pay attention to the cooperation between antioxidants, antioxidants and other heat, light stabilizers, etc.. Then it is necessary to think about the antioxidant with<\/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-6093","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>How to choose antioxidant? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"In the selection of antioxidants to pay attention to the cooperation between antioxidants, antioxidants and other heat, light stabilizers, etc.. 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