{"id":3326,"date":"2020-10-07T08:56:19","date_gmt":"2020-10-07T08:56:19","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3326"},"modified":"2026-04-28T10:41:47","modified_gmt":"2026-04-28T10:41:47","slug":"synthesis-and-usage-of-light-stabilizer-770","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/synthesis-and-usage-of-light-stabilizer-770\/","title":{"rendered":"Synth\u00e8se et utilisation du stabilisateur de lumi\u00e8re 770"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Les polym\u00e8res sont in\u00e9vitablement expos\u00e9s \u00e0 la lumi\u00e8re du soleil ou \u00e0 une forte fluorescence au cours de leur traitement et de leur utilisation, ce qui entra\u00eene une diminution de leurs propri\u00e9t\u00e9s physiques, un jaunissement, une d\u00e9coloration, une fragilisation et une diminution de la transparence, qui non seulement affectent l'exp\u00e9rience d'utilisation, mais peuvent \u00e9galement avoir de graves cons\u00e9quences. Par cons\u00e9quent, la pr\u00e9vention du vieillissement \u00e0 la lumi\u00e8re des polym\u00e8res est devenue un axe de recherche important dans le domaine des mat\u00e9riaux polym\u00e8res. \u00c0 l'heure actuelle, l'ajout direct de divers stabilisateurs de lumi\u00e8re aux polym\u00e8res est la m\u00e9thode la plus efficace pour am\u00e9liorer la stabilit\u00e9 \u00e0 la lumi\u00e8re des mat\u00e9riaux. Les stabilisateurs de lumi\u00e8re courants peuvent \u00eatre divis\u00e9s en agents de protection contre la lumi\u00e8re, en absorbeurs d'ultraviolets, en att\u00e9nuateurs et en stabilisateurs de lumi\u00e8re \u00e0 base d'amines encombr\u00e9es, en fonction de leur m\u00e9canisme d'action. Parmi eux, les stabilisateurs de lumi\u00e8re \u00e0 base d'amine encombr\u00e9e pr\u00e9sentent les avantages d'une grande efficacit\u00e9, d'une faible quantit\u00e9 ajout\u00e9e et d'un impact moindre sur les produits. C'est pourquoi ils ont gagn\u00e9 la faveur du public. Les stabilisateurs de lumi\u00e8re \u00e0 base d'amines encombr\u00e9es agissent principalement de quatre mani\u00e8res : en d\u00e9composant l'hydroperoxyde, en \u00e9touffant l'oxyg\u00e8ne excit\u00e9, en capturant les radicaux libres et en se r\u00e9g\u00e9n\u00e9rant, ce qui permet d'am\u00e9liorer efficacement la stabilit\u00e9 \u00e0 la lumi\u00e8re des polym\u00e8res.<\/h4>\n\n<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/strong> A practical stabilization strategy starts with the degradation risk first, then screens the additive package around processing conditions, service life, and appearance requirements.<\/p>\n<!-- lc-qa-end -->\n\n\n\n\n\n\n<h4 class=\"wp-block-heading\">Un type tr\u00e8s repr\u00e9sentatif de stabilisateurs de lumi\u00e8re \u00e0 amine encombr\u00e9e est un compos\u00e9 d'amine organique \u00e0 encombrement st\u00e9rique bas\u00e9 sur le 2,2,6,6-t\u00e9tram\u00e9thyl-4-pip\u00e9ridinyle. En 1972, la soci\u00e9t\u00e9 suisse Ciba-Geigy (Ciba-Geigy) et la soci\u00e9t\u00e9 japonaise Sankyo ont conjointement mis au point et men\u00e9 des recherches, et ont obtenu deux vari\u00e9t\u00e9s repr\u00e9sentatives de stabilisateur de lumi\u00e8re 744 et de stabilisateur de lumi\u00e8re 770 apr\u00e8s avoir pass\u00e9 au crible 1 200 compos\u00e9s d'amine organique. Le stabilisateur de lumi\u00e8re 770 pr\u00e9sente une bonne compatibilit\u00e9 avec les r\u00e9sines, une absence de coloration, une faible toxicit\u00e9 et un bon effet de stabilisation de la lumi\u00e8re. En tant que stabilisateur de lumi\u00e8re efficace, il est largement utilis\u00e9 dans les r\u00e9sines PP, PE, PVC, PS, ABS et autres mat\u00e9riaux. \u00c0 l'heure actuelle, il existe de nombreux rapports sur l'application du stabilisateur de lumi\u00e8re 770, mais les recherches sur son processus de synth\u00e8se, en particulier l'influence du processus sur la structure et les composants du produit, sont moins nombreuses. Cet article traite de la synth\u00e8se du <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-770-tinuvin-770-cas-52829-07-9\/\" target=\"_blank\">stabilisateur de lumi\u00e8re 770<\/a><\/strong>L'\u00e9tude de l'impact de l'utilisation d'un catalyseur sur le taux de conversion et la performance du produit a \u00e9t\u00e9 r\u00e9alis\u00e9e \u00e0 l'aide d'une s\u00e9rie de m\u00e9thodes, de solvants, de types de catalyseurs, de processus de post-traitement, etc.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">La voie de synth\u00e8se g\u00e9n\u00e9ralement utilis\u00e9e consiste \u00e0 utiliser l'acide s\u00e9bacique et le t\u00e9tram\u00e9thylpip\u00e9ridol pour r\u00e9agir directement par d\u00e9shydratation et est\u00e9rification afin d'obtenir le stabilisateur de lumi\u00e8re 770, comme le montre la figure. Selon qu'un solvant est ajout\u00e9 ou non, on peut distinguer la m\u00e9thode en vrac et la m\u00e9thode par solvant. <\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">1. Dans la m\u00e9thode en vrac, une certaine proportion d'acide s\u00e9bacique, de t\u00e9tram\u00e9thylpip\u00e9ridinol et de catalyseur sont ajout\u00e9s au r\u00e9cipient de r\u00e9action et chauff\u00e9s, et les mati\u00e8res premi\u00e8res elles-m\u00eames fondent en tant que solvant pour la r\u00e9action. Apr\u00e8s la r\u00e9action, le produit est lav\u00e9 \u00e0 l'eau ou au solvant et recristallis\u00e9 pour obtenir le stabilisateur de lumi\u00e8re 770.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Le choix du catalyseur a une influence cruciale sur la r\u00e9action. Un catalyseur appropri\u00e9 peut augmenter l'activit\u00e9 du centre de r\u00e9action et acc\u00e9l\u00e9rer la vitesse de r\u00e9action. Des \u00e9tudes g\u00e9n\u00e9rales ont montr\u00e9 que l'acide p-tolu\u00e8nesulfonique et les esters de phtalate ont une efficacit\u00e9 catalytique \u00e9lev\u00e9e pour l'est\u00e9rification, mais lorsqu'ils sont utilis\u00e9s dans la synth\u00e8se du stabilisateur de lumi\u00e8re 770, les rendements des deux sont inf\u00e9rieurs \u00e0 70%, principalement en raison du syst\u00e8me Le t\u00e9tram\u00e9thylpip\u00e9ridinol, mati\u00e8re premi\u00e8re, est facile \u00e0 sublimer, ce qui affecte le taux de conversion des mati\u00e8res premi\u00e8res. En outre, la temp\u00e9rature de r\u00e9action ne doit pas \u00eatre trop \u00e9lev\u00e9e, ce qui rend difficile l'\u00e9limination de l'eau g\u00e9n\u00e9r\u00e9e, qui r\u00e9agira avec le catalyseur de l'ester de phtalate et le rendra inefficace. C'est pourquoi les chercheurs ont explor\u00e9 la m\u00e9thode du solvant pour am\u00e9liorer le proc\u00e9d\u00e9.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"846\" height=\"596\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-1.png\" alt=\"\" class=\"wp-image-3327\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-1.png 846w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-1-300x211.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-1-768x541.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-1-600x423.png 600w\" sizes=\"(max-width: 846px) 100vw, 846px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">2. La m\u00e9thode du solvant consiste \u00e0 ajouter un solvant organique sur la base de la r\u00e9action ci-dessus. Apr\u00e8s la r\u00e9action, le solvant est \u00e9vapor\u00e9 et le produit est trait\u00e9. Par rapport \u00e0 la m\u00e9thode de la masse, la m\u00e9thode du solvant ne n\u00e9cessite pas d'atteindre la temp\u00e9rature de fusion des r\u00e9actifs, r\u00e9duit la temp\u00e9rature de r\u00e9action du syst\u00e8me et r\u00e9duit le ph\u00e9nom\u00e8ne de sublimation. Parall\u00e8lement, l'eau contenue dans le syst\u00e8me peut \u00eatre \u00e9limin\u00e9e au cours du processus de reflux du solvant et une partie des mati\u00e8res premi\u00e8res sublim\u00e9es peut \u00eatre ramen\u00e9e.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Apr\u00e8s avoir explor\u00e9 diff\u00e9rents solvants, on constate que l'\u00e9ther de p\u00e9trole et le n-heptane \u00e0 une temp\u00e9rature inf\u00e9rieure \u00e0 100 \u00b0C ont une faible efficacit\u00e9. Bien que les points d'\u00e9bullition \u00e9lev\u00e9s du tolu\u00e8ne et du xyl\u00e8ne permettent d'atteindre des taux de conversion \u00e9lev\u00e9s, ils restent insatisfaisants et ont des points d'\u00e9bullition \u00e9lev\u00e9s. Le post-traitement des solvants est \u00e9galement plus difficile.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Les chercheurs ont continu\u00e9 \u00e0 explorer la voie de la r\u00e9action de transest\u00e9rification illustr\u00e9e dans la figure ci-dessous. La r\u00e9action entre le s\u00e9bacate de dim\u00e9thyle et le t\u00e9tram\u00e9thylpip\u00e9ridinol peut \u00eatre effectu\u00e9e \u00e0 une temp\u00e9rature plus basse. L'utilisation du n-heptane comme solvant est b\u00e9n\u00e9fique pour \u00e9liminer la r\u00e9action avec le m\u00e9thanol. Diff\u00e9rents catalyseurs ont une efficacit\u00e9 catalytique \u00e9lev\u00e9e, parmi lesquels les catalyseurs au sodium ont atteint un taux de conversion de 99,8%. Apr\u00e8s avoir explor\u00e9 plus avant l'influence du rapport des mati\u00e8res premi\u00e8res sur la r\u00e9action, il a \u00e9t\u00e9 constat\u00e9 que lorsque le rapport molaire entre le t\u00e9tram\u00e9thylpip\u00e9ridinol et l'acide s\u00e9bacique \u00e9tait de 2,0:1, le taux de conversion \u00e9tait le plus \u00e9lev\u00e9, et continuer \u00e0 augmenter le rapport n'\u00e9tait pas propice \u00e0 l'\u00e9limination ult\u00e9rieure des mati\u00e8res premi\u00e8res exc\u00e9dentaires.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"853\" height=\"539\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1.png\" alt=\"\" class=\"wp-image-3328\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1.png 853w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-300x190.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-768x485.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-600x379.png 600w\" sizes=\"(max-width: 853px) 100vw, 853px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Enfin, un stabilisateur de lumi\u00e8re 770 (770 ZZ) a \u00e9t\u00e9 pr\u00e9par\u00e9 sur la base de l'exploration ci-dessus et compar\u00e9 au produit commercial (770 DF). La figure suivante repr\u00e9sente le spectre infrarouge des deux produits. On peut constater que les pics d'absorption caract\u00e9ristiques du 770 DF et du 770 ZZ sont fondamentalement les m\u00eames et qu'il n'y a pas d'autres pics d'impuret\u00e9, ce qui indique que la structure du stabilisateur de lumi\u00e8re 770 fabriqu\u00e9 par l'entreprise elle-m\u00eame est compatible avec le produit commercial et qu'il a une bonne puret\u00e9.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"852\" height=\"685\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-1.png\" alt=\"\" class=\"wp-image-3329\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-1.png 852w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-1-300x241.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-1-768x617.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-1-600x482.png 600w\" sizes=\"(max-width: 852px) 100vw, 852px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">La figure ci-dessous repr\u00e9sente la courbe thermogravim\u00e9trique. Le stabilisateur de lumi\u00e8re 770, qui n'a pas \u00e9t\u00e9 lav\u00e9 \u00e0 l'eau, pr\u00e9sente une mauvaise stabilit\u00e9 thermique. Il se peut qu'il y ait des r\u00e9sidus de catalyseur, ce qui fait que le produit subit la r\u00e9action inverse de la r\u00e9action d'est\u00e9rification \u00e0 haute temp\u00e9rature. La stabilit\u00e9 thermique du produit transform\u00e9 n'est pas tr\u00e8s diff\u00e9rente de celle des produits commerciaux, ce qui permet de r\u00e9pondre aux exigences de transformation de la plupart des produits.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"855\" height=\"647\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/4-1.png\" alt=\"\" class=\"wp-image-3330\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/4-1.png 855w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/4-1-300x227.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/4-1-768x581.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/4-1-600x454.png 600w\" sizes=\"(max-width: 855px) 100vw, 855px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Enfin, les chercheurs ont test\u00e9 la performance anti-ultraviolets du stabilisateur de lumi\u00e8re 770 qu'ils ont fabriqu\u00e9 eux-m\u00eames. Apr\u00e8s 672 heures d'irradiation UV sur l'ABS, la couleur de l'\u00e9chantillon contenant 0,3 partie de 770 DF \u00e9tait l\u00e9g\u00e8rement plus fonc\u00e9e que celle de l'\u00e9chantillon contenant 0,3 partie de 770 ZZ. Le stabilisateur de lumi\u00e8re 770 pr\u00e9sente une r\u00e9sistance aux UV l\u00e9g\u00e8rement sup\u00e9rieure. Il se peut donc que les produits fabriqu\u00e9s par le chercheur contiennent une petite quantit\u00e9 de monoesters qui ne peuvent pas \u00eatre compl\u00e8tement \u00e9limin\u00e9s, ce qui est b\u00e9n\u00e9fique pour la dispersion du 770. En r\u00e9sum\u00e9, les performances du stabilisateur de lumi\u00e8re 770 fabriqu\u00e9 par le chercheur diff\u00e8rent peu de celles des produits commerciaux. Les facteurs d'influence du processus de fabrication ont \u00e9t\u00e9 explor\u00e9s avec succ\u00e8s et une voie avec un rendement plus \u00e9lev\u00e9 a \u00e9t\u00e9 obtenue.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Contactez-nous d\u00e8s maintenant !<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Nous acceptons les services personnalis\u00e9s. Nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel <strong>info@longchangchemical.com<\/strong> pendant les heures de travail ( 8:30 am to 6:00 pm UTC+8 Mon.~Sat. ) ou utilisez le chat en direct du site web pour obtenir une r\u00e9ponse rapide.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Cet article a \u00e9t\u00e9 r\u00e9dig\u00e9 par Longchang Chemical R&amp;D Department. Si vous souhaitez le copier ou le r\u00e9imprimer, veuillez en indiquer la source.<\/h4>\n\n\n<!-- lc-commercial-start -->\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\/fr\/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<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/uv-5151-cas-104810-48-2\/\">CHLUMILS UV-5151<\/a>:<\/strong> A practical stabilizer-package reference when broader light-aging protection is needed.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/acetyl-tributyl-citrate-cas-77-90-7\/\">CHLUMIFLEX ATBC<\/a>:<\/strong> A practical non-phthalate plasticizer reference for application and compliance screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/dotp-cas-6422-86-2\/\">CHLUMIFLEX DOTP<\/a>:<\/strong> A standard terephthalate-plasticizer benchmark in flexible-plastics applications.<\/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<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>Polymers are inevitably exposed to sunlight or strong fluorescence during processing and use, resulting in a decline in their physical properties, yellowing, discoloration, embrittlement, and decreased transparency, which will not<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3326","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Synthesis and usage of Light Stabilizer 770 - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"Polymers are inevitably exposed to sunlight or strong fluorescence during processing and use, resulting in a decline in their physical properties, yello...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/fr\/synthesis-and-usage-of-light-stabilizer-770\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Synthesis and usage of Light Stabilizer 770 - 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