{"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>Jawaban singkat:<\/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>Rute seleksi praktis untuk paket antioksidan, penyerap UV, dan HALS.<\/h2>\n<p>Sebagian besar keputusan terkait stabilizer akan lebih efektif jika dipertimbangkan sebagai keputusan paket, bukan keputusan produk tunggal. Pembeli yang berorientasi teknis biasanya mendapatkan jawaban terbaik dengan meninjau penuaan panas jangka panjang, stabilitas proses, paparan cuaca, dan sensitivitas warna secara bersamaan.<\/p>\n<ul>\n<li><strong>Perlindungan pemrosesan terpisah dari stabilitas jangka panjang:<\/strong> Aditif terbaik untuk riwayat peleburan tidak selalu sama dengan aditif yang memberikan retensi masa pakai terbaik.<\/li>\n<li><strong>Gunakan sinergi secara sengaja:<\/strong> Banyak sistem polimer dan pelapis bekerja paling baik ketika stabilisator primer dan sekunder dipasangkan secara sengaja.<\/li>\n<li><strong>Tinjau persyaratan warna dan kejernihan:<\/strong> Sistem yang bening, pucat, bersentuhan dengan makanan, atau berwarna putih seringkali membutuhkan kemasan yang lebih rapat daripada produk industri berwarna gelap.<\/li>\n<li><strong>Periksa kondisi penuaan yang sebenarnya:<\/strong> Panas, sinar UV, kelembapan, dan paparan luar ruangan dapat mengubah jalur stabilisasi mana yang paling kuat secara komersial.<\/li>\n<\/ul>\n<h3>Referensi produk yang direkomendasikan<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/id\/product\/cas-270586-78-2\/\">CHLUMINIT TMO<\/a>:<\/strong> Poin perbandingan yang berharga ketika diskusi penurunan penguningan atau penggantian TPO menjadi penting.<\/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> Referensi HALS yang kuat untuk penyaringan yang berfokus pada ketahanan cuaca dalam pelapis dan polimer.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/id\/product\/uv-5151-cas-104810-48-2\/\">CHLUMILS UV-5151<\/a>:<\/strong> Referensi paket stabilisator praktis ketika dibutuhkan perlindungan penuaan akibat cahaya yang lebih luas.<\/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> Tolok ukur HALS yang sudah dikenal ketika ketahanan terhadap cuaca dan daya tahan penampilan sedang dievaluasi.<\/li>\n<\/ul>\n<h3>FAQ untuk pembeli dan formulator<\/h3>\n<p><strong>Mengapa paket penstabil seringkali lebih kuat daripada aditif tunggal?<\/strong><br \/>Karena produk yang berbeda dapat melindungi bagian yang berbeda dari jalur degradasi, maka kemasan seringkali mencakup lebih banyak risiko daripada hanya satu jenis saja.<\/p>\n<p><strong>Apakah menambahkan lebih banyak antioksidan atau penstabil UV selalu meningkatkan kinerja?<\/strong><br \/>Belum tentu. Dosis berlebih dapat meningkatkan biaya dan terkadang menimbulkan efek samping, sehingga sebagian besar sistem bekerja paling baik dalam rentang dosis yang telah diuji.<\/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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