{"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\/id\/what-is-the-light-aging-protection-of-uv-absorbers-for-coatings\/","title":{"rendered":"Apakah perlindungan penuaan ringan dari peredam UV untuk pelapis?"},"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>Apakah perlindungan penuaan ringan dari peredam UV untuk pelapis?<\/p>\n<p>&nbsp;<\/p>\n<p>UV absorbers such as <a href=\"https:\/\/longchangchemical.com\/id\/product\/uv-384-2\/\">Penyerap UV 384-2<\/a> used together with <a href=\"https:\/\/longchangchemical.com\/id\/product\/light-stabilizer-292\/\">Penstabil Cahaya 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>Ada banyak cara untuk mengkarakterisasi kinerja penuaan ringan dari pelapis. Untuk polimer tanpa struktur karbonil, perilaku penuaan cahayanya dapat dicirikan oleh perubahan sinyal karbonil dalam spektrum penyerapan inframerah. Namun, beberapa pelapis mengandung ester karbonil, ikatan ester amonia, dll., Termasuk pelapis UV pengawet cahaya, yang tidak cocok untuk menggunakan nilai karbonil untuk mengkarakterisasi perilaku penuaan cahayanya. Dalam hal ini, kita dapat menggunakan indeks menguning (YI) untuk mengkarakterisasi mereka. Metode standar internasional mengikuti ASTM D1925, di mana film yang diawetkan terpapar sinar UV, dan setelah setiap periode pemaparan, transmitansi film yang diawetkan pada beberapa panjang gelombang tertentu diukur dengan spektrofotometer UV-terlihat, dan sumber penyinaran dapat berupa lampu merkuri bertekanan sedang dengan kaca Pyrex yang menyaring sinar UV gelombang pendek di bawah 320 nm.<\/p>\n<p>Indeks kekuningan didefinisikan sebagai.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Uji penuaan menggunakan sumber cahaya buatan disebut penuaan yang dipercepat, penuaan yang dipercepat sering kali dicocokkan dengan perangkat tambahan seperti kelembaban, suhu, semprotan garam, dll., Untuk mengevaluasi kinerja anti-penuaan lapisan secara lebih obyektif dan komprehensif. Selain sumber cahaya ultraviolet, kekuatan beberapa ratus watt lampu xenon, output spektralnya dari spektrum kontinu 250nm, dan mencapai dasar distribusi pita spektral matahari mirip dengan yang biasa digunakan pada sumber cahaya mesin penuaan buatan. Sumber cahaya penuaan buatan lainnya termasuk QUVA dan QUVB. QUVA adalah keluaran ultraviolet gelombang panjang, dan panjang gelombang keluaran QUVB adalah 280-360nm, dengan pusatnya terletak di 310mm. lebih primitif, tetapi sepenuhnya konsisten dengan penuaan alami dari uji penuaan cahaya yang dilakukan di bawah sinar matahari langsung, seperti Amerika Serikat, penggunaan uji eksposur sudut 45 derajat Florida.<\/p>\n<p>Karena penyerapan ozon atmosfer bumi, sinar matahari melalui atmosfer ke tanah, 295nm di bawah sinar ultraviolet gelombang pendek berenergi tinggi pada dasarnya disaring. Oleh karena itu, sinar matahari tanah pada penuaan cahaya lapisan polimer memiliki efek yang kuat pada pita panjang gelombang terutama terkonsentrasi pada 295 ~ 400nm, semakin pendek panjang gelombang, semakin tinggi energinya, efek penuaan cahaya lapisan polimer akan semakin kuat. Dipengaruhi oleh musim, waktu, ketinggian, garis lintang, cuaca, polusi udara, dan banyak faktor lainnya, intensitas UV sinar matahari dapat berubah. Lapisan ozon menyerap sinar ultraviolet di bawah 320nm, tetapi dengan polusi atmosfer, perusakan lapisan ozon, intensitas sinar ultraviolet gelombang pendek yang tiba di tanah meningkat dari tahun ke tahun. Menggunakan sumber cahaya yang berbeda untuk mendapatkan hasil penuaan cahaya mungkin tidak konsisten, terutama karena berbagai distribusi panjang gelombang sumber cahaya, intensitas, kelembaban lingkungan, suhu dan kondisi lainnya tidak sepenuhnya konsisten.<\/p>\n<p>Selain indeks kekuningan, kinerja anti-penuaan dari film yang diawetkan juga dapat dikarakterisasi dengan memeriksa spektrum penyerapan, kilap, kabut, daya rekat, sifat mekanik, perilaku mekanik termodinamika, dan indikator perubahan lainnya. Karena prevalensi foto-oksidasi dalam proses penuaan cahaya, perubahan indeks hidroksil atau indeks peroksida pada lapisan sering digunakan sebagai parameter untuk mencerminkan penuaan cahaya. Struktur polimer yang berbeda juga dapat dikarakterisasi sesuai dengan perubahan konsentrasi gugus sensitif.<\/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\/id\/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\/id\/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\/id\/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\/id\/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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