{"id":6172,"date":"2023-07-10T14:31:14","date_gmt":"2023-07-10T14:31:14","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6172"},"modified":"2026-04-28T10:42:18","modified_gmt":"2026-04-28T10:42:18","slug":"what-is-the-light-aging-protection-of-uv-absorbers-for-coatings","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/de\/what-is-the-light-aging-protection-of-uv-absorbers-for-coatings\/","title":{"rendered":"Wie hoch ist der Lichtalterungsschutz von UV-Absorbern f\u00fcr Beschichtungen?"},"content":{"rendered":"<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>Wie hoch ist der Lichtalterungsschutz von UV-Absorbern f\u00fcr Beschichtungen?<\/p>\n<p>&nbsp;<\/p>\n<p>UV absorbers such as <a href=\"https:\/\/longchangchemical.com\/de\/product\/uv-384-2\/\">UV-Absorber 384-2<\/a> used together with <a href=\"https:\/\/longchangchemical.com\/de\/product\/light-stabilizer-292\/\">Lichtstabilisator 292<\/a> are effective in slowing down the light aging behavior of cured coatings. The addition of various suitable UV absorbers and light stabilizers to coating formulations is a well-established method of operation for organic coatings for outdoor use where high quality and longevity are required. UV absorbers such as EVERSORB 80, EVERSORB 93, etc. are classic anti-aging products.<\/p>\n<p>Es gibt viele M\u00f6glichkeiten, das Lichtalterungsverhalten von Beschichtungen zu charakterisieren. Bei Polymeren ohne Carbonylstruktur kann ihr Lichtalterungsverhalten durch die Ver\u00e4nderung des Carbonylsignals im Infrarotabsorptionsspektrum charakterisiert werden. Einige Beschichtungen enthalten jedoch Ester-Carbonyl, Ammoniak-Ester-Bindungen usw., einschlie\u00dflich lichth\u00e4rtender UV-Beschichtungen, die sich nicht f\u00fcr die Verwendung des Carbonylwerts zur Charakterisierung ihres Lichtalterungsverhaltens eignen. In diesem Fall k\u00f6nnen wir den Vergilbungsindex (YI) zur Charakterisierung verwenden. Die internationale Standardmethode folgt der ASTM D1925, bei der der geh\u00e4rtete Film UV-Licht ausgesetzt wird und nach jeder Belichtungszeit die Durchl\u00e4ssigkeit des geh\u00e4rteten Films bei mehreren spezifischen Wellenl\u00e4ngen mit einem UV-Spektrophotometer gemessen wird. Die Strahlungsquelle kann eine Quecksilber-Mitteldrucklampe mit Pyrexglas sein, das das kurzwellige UV-Licht unter 320 nm herausfiltert.<\/p>\n<p>Der Vergilbungsindex ist definiert als.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Der Alterungstest mit k\u00fcnstlicher Lichtquelle wird als beschleunigte Alterung bezeichnet. Die beschleunigte Alterung wird oft mit zus\u00e4tzlichen Ger\u00e4ten wie Feuchtigkeit, Temperatur, Salzspr\u00fchnebel usw. kombiniert, um die Anti-Aging-Leistung der Beschichtung objektiver und umfassender zu bewerten. Zus\u00e4tzlich zu den ultravioletten Lichtquelle, die Leistung von ein paar hundert Watt Xenon-Lampe, seine spektrale Leistung von 250nm kontinuierliches Spektrum, und erreichen den Boden der Sonne die spektrale Bandverteilung ist \u00e4hnlich wie die \u00fcblicherweise in der k\u00fcnstlichen Alterung Maschine Lichtquelle verwendet. Andere Lichtquellen f\u00fcr die k\u00fcnstliche Alterung sind QUVA und QUVB. QUVA ist eine langwellige Ultraviolett-Ausgang, und der Ausgang Wellenl\u00e4nge von QUVB ist 280-360nm, mit dem Zentrum bei 310mm. mehr primitiv, aber in vollem Einklang mit der nat\u00fcrlichen Alterung der Lichtalterung Test wird in direktem Sonnenlicht, wie die Vereinigten Staaten, die Verwendung des Florida 45-Grad-Winkel Belichtung Test durchgef\u00fchrt.<\/p>\n<p>Aufgrund der atmosph\u00e4rischen Ozonabsorption der Erde, Sonnenlicht durch die Atmosph\u00e4re auf den Boden, 295nm unter dem hochenergetischen kurzwelligen ultravioletten Licht ist im Grunde herausgefiltert. Daher ist der Boden Sonnenlicht auf die Polymer-Beschichtung Lichtalterung hat einen starken Einfluss auf die Wellenl\u00e4nge Band ist vor allem in der 295 ~ 400nm konzentriert, desto k\u00fcrzer die Wellenl\u00e4nge, desto h\u00f6her die Energie, die Polymer-Beschichtung Lichtalterung Wirkung wird intensiver sein. Beeinflusst durch Jahreszeit, Zeit, H\u00f6he, Breitengrad, Wetter, Luftverschmutzung und viele andere Faktoren kann sich die UV-Intensit\u00e4t des Sonnenlichts am Boden \u00e4ndern. Die Ozonschicht absorbiert ultraviolettes Licht unter 320 nm, aber mit der Luftverschmutzung und der Zerst\u00f6rung der Ozonschicht nimmt die Intensit\u00e4t des kurzwelligen ultravioletten Lichts, das auf den Boden trifft, von Jahr zu Jahr zu. Mit verschiedenen Lichtquellen, um das Licht Alterung Ergebnisse k\u00f6nnen nicht konsistent sein, vor allem wegen einer Vielzahl von Lichtquelle Wellenl\u00e4ngenverteilung, Intensit\u00e4t, Luftfeuchtigkeit, Temperatur und anderen Bedingungen sind nicht vollst\u00e4ndig konsistent.<\/p>\n<p>Neben dem Vergilbungsindex kann die Alterungsbest\u00e4ndigkeit des ausgeh\u00e4rteten Films auch durch die Untersuchung des Absorptionsspektrums, des Glanzes, der Tr\u00fcbung, der Adh\u00e4sion, der mechanischen Eigenschaften, des thermodynamischen mechanischen Verhaltens und anderer Indikatoren f\u00fcr Ver\u00e4nderungen charakterisiert werden. Da bei der Lichtalterung die Photooxidation vorherrscht, wird die Ver\u00e4nderung des Hydroxyl- oder Peroxidindexes in der Beschichtung h\u00e4ufig als Parameter zur Darstellung der Lichtalterung verwendet. Unterschiedliche Strukturen von Polymeren lassen sich auch anhand der Ver\u00e4nderungen in der Konzentration empfindlicher Gruppen charakterisieren.<\/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\/de\/product\/cas-270586-78-2\/\">CHLUMINIT TMO<\/a>:<\/strong> A valuable comparison point when lower yellowing or TPO-replacement discussions matter.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/de\/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\/de\/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\/de\/product\/light-stabilizer-770-tinuvin-770-cas-52829-07-9\/\">CHLUMILS UV-770<\/a>:<\/strong> A familiar HALS benchmark when weatherability and appearance retention are under review.<\/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>UV absorbers and light stabilizers are effective in slowing down the light aging behavior of cured coatings. The addition of various suitable UV absorbers and light stabilizers to coating formulations<\/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-6172","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>What is the light aging protection of UV absorbers for coatings? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"UV absorbers and light stabilizers are effective in slowing down the light aging behavior of cured coatings. 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