{"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\/fr\/how-to-choose-antioxidant\/","title":{"rendered":"Comment choisir un antioxydant ?"},"content":{"rendered":"<h1><strong>Comment choisir un antioxydant ?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>R\u00e9ponse rapide :<\/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\/fr\/product\/chlumiao-1010-cas-6683-19-8\/\">Antioxydant 1010<\/a> is often paired with <a href=\"https:\/\/longchangchemical.com\/fr\/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) ajout et effet.<\/p>\n<p>L'utilisation d'une vari\u00e9t\u00e9 d'antioxydants peut favoriser leurs caract\u00e9ristiques et leurs effets respectifs, augmentant ainsi l'effet total. Par exemple, les diff\u00e9rentes r\u00e9sistances \u00e0 l'\u00e9vaporation ou \u00e0 l'espace des ph\u00e9nols encombr\u00e9s et leur utilisation peuvent favoriser leur effet antioxydant dans une large gamme de temp\u00e9ratures, ce qui renforce l'effet. Si un seul type d'antioxydant est utilis\u00e9 dans la formule, il est in\u00e9vitable qu'il participe en plus grande quantit\u00e9, ce qui entra\u00eenera des r\u00e9actions d'oxydation intenses \u00e0 des concentrations \u00e9lev\u00e9es, ce qui n'est pas autoris\u00e9. En revanche, le choix de plusieurs antioxydants \u00e0 faible concentration et leur utilisation permettent non seulement d'atteindre l'objectif souhait\u00e9, mais aussi de pr\u00e9venir une oxydation intense et de poursuivre l'effet additif de l'antioxydant.<\/p>\n<p>(2) Effet synergique.<\/p>\n<p>\u2460Lorsque deux activit\u00e9s diff\u00e9rentes de l'antioxydant principal sont utilis\u00e9es, l'activit\u00e9 \u00e9lev\u00e9e de l'antioxydant donne des atomes d'hydrog\u00e8ne, de sorte que l'oxydation de la cha\u00eene active s'arr\u00eate ; et l'activit\u00e9 faible de l'antioxydant peut donner l'activit\u00e9 \u00e9lev\u00e9e de l'antioxydant pour fournir des atomes d'hydrog\u00e8ne, de sorte qu'il se r\u00e9g\u00e9n\u00e8re et d\u00e9veloppe un effet antioxydant durable, de sorte que l'effet antioxydant est tr\u00e8s bon.<\/p>\n<p>\u2461Lors de l'utilisation d'antioxydants principaux et auxiliaires, il convient de veiller au d\u00e9veloppement d'effets synergiques. Par exemple, l'antioxydant principal donne simplement des atomes d'hydrog\u00e8ne, les atomes d'hydrog\u00e8ne peuvent transformer les radicaux libres peroxydes en hydroperoxydes, arr\u00eater la r\u00e9action en cha\u00eene ; ensuite, les hydroperoxydes et l'antioxydant auxiliaire ont un effet d'agent de division des peroxydes, g\u00e9n\u00e9rant des produits de stabilisation inactifs. Ainsi, la vitesse des r\u00e9actions d'oxydation est fortement ralentie et l'effet antioxydant est renforc\u00e9. La polyol\u00e9fine est largement utilis\u00e9e dans l'antioxydant 264 et le syst\u00e8me DLPT en est un exemple.<\/p>\n<p>\u2462Une mol\u00e9cule antioxydante poss\u00e8de deux ou plusieurs fonctions stabilisatrices diff\u00e9rentes, dites depuis l'effet synergique, comme l'antioxydant ph\u00e9nolique encombr\u00e9 contenant du soufre, il a un arr\u00eat de la r\u00e9action en cha\u00eene et un agent de diff\u00e9renciation du peroxyde de l'effet \u00e0 deux couches, cet antioxydant peut renforcer l'effet antioxydant, c'est un antioxydant plus souhaitable.<\/p>\n<p>\u2463 antioxydant et stabilisateur de chaleur et de lumi\u00e8re doivent \u00eatre choisis pour avoir un effet synergique et s'efforcer d'\u00e9viter les effets oppos\u00e9s. Par exemple, la plupart des antioxydants amin\u00e9s et ph\u00e9noliques, en pr\u00e9sence de noir de carbone, r\u00e9duisent consid\u00e9rablement l'efficacit\u00e9 de l'effet oppos\u00e9, ce qui peut \u00eatre d\u00fb au fait que le noir de carbone catalyse directement l'oxydation des antioxydants, \u00e9puisant une partie de l'antioxydant caus\u00e9 par le noir de carbone. L'antioxydant li\u00e9 au thio\u00e9ther et le noir de carbone ont un effet synergique. Par cons\u00e9quent, il convient d'abandonner le premier et d'utiliser le second.<\/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>R\u00e9f\u00e9rences de produits recommand\u00e9es<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> Un antioxydant primaire de r\u00e9f\u00e9rence largement utilis\u00e9 pour la stabilit\u00e9 thermique \u00e0 long terme.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> Un r\u00e9f\u00e9rence pratique de stabilit\u00e9 du proc\u00e9d\u00e9 lorsque le contr\u00f4le de l'hydroperoxyde est important.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/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\/fr\/product\/light-stabilizer-123-tinuvin-123-cas-129757-67-1\/\">CHLUMILS UV-123<\/a>:<\/strong> Une r\u00e9f\u00e9rence HALS solide pour les \u00e9crans ax\u00e9s sur la r\u00e9sistance aux intemp\u00e9ries dans les rev\u00eatements et les polym\u00e8res.<\/li>\n<\/ul>\n<h3>FAQ pour les acheteurs et les formulateurs<\/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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