{"id":5401,"date":"2022-07-23T13:33:09","date_gmt":"2022-07-23T13:33:09","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5401"},"modified":"2022-07-23T13:33:09","modified_gmt":"2022-07-23T13:33:09","slug":"what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations\/","title":{"rendered":"Quels sont les \u00e9l\u00e9ments de s\u00e9lection des oligom\u00e8res UV pour les formulations de vernis photopolym\u00e9risables ?"},"content":{"rendered":"

Quels sont les \u00e9l\u00e9ments de s\u00e9lection des oligom\u00e8res UV pour les formulations de vernis photopolym\u00e9risables ?<\/strong><\/h1>\n

Les vernis photopolym\u00e9risables, \u00e9galement connus sous le nom de vernis UV, utilisent la lumi\u00e8re UV comme source d'\u00e9nergie pour polym\u00e9riser le vernis. Ils peuvent \u00eatre durcis rapidement sur des substrats tels que le papier, le plastique, le cuir et le bois, sans n\u00e9cessiter de chaleur. Les vernis photopolym\u00e9risables sont principalement compos\u00e9s de r\u00e9sines photopolym\u00e9risables (oligom\u00e8res), de photoinitiateurs (photosensibilisateurs), de diluants et d'additifs. Les r\u00e9sines photopolym\u00e9risables sont g\u00e9n\u00e9ralement des r\u00e9sines de faible poids mol\u00e9culaire avec des liaisons insatur\u00e9es, telles que les polyesters insatur\u00e9s, les oligom\u00e8res acryliques, etc. Cet article traite des \u00e9l\u00e9ments de s\u00e9lection des r\u00e9sines photopolym\u00e9risables (oligom\u00e8res) dans les formulations de peintures photopolym\u00e9risables.<\/p>\n

I. Viscosit\u00e9.<\/p>\n

Le choix d'une r\u00e9sine \u00e0 faible viscosit\u00e9 permet de r\u00e9duire la quantit\u00e9 de diluant actif. Mais les r\u00e9sines \u00e0 faible viscosit\u00e9 ont souvent une faible masse mol\u00e9culaire relative, ce qui affecte les propri\u00e9t\u00e9s physiques et m\u00e9caniques du film durci.<\/p>\n

Deuxi\u00e8mement, la vitesse de polym\u00e9risation de la lumi\u00e8re.<\/p>\n

En r\u00e8gle g\u00e9n\u00e9rale, plus le degr\u00e9 fonctionnel de la r\u00e9sine photopolym\u00e9risable est \u00e9lev\u00e9, plus la vitesse de photopolym\u00e9risation est rapide, la vitesse de photopolym\u00e9risation de l'acrylate \u00e9poxy est rapide, la vitesse de photopolym\u00e9risation de l'oligom\u00e8re modifi\u00e9 par l'amine est \u00e9galement rapide. Il est tr\u00e8s important de choisir une r\u00e9sine ayant une vitesse de photopolym\u00e9risation rapide, ce qui permet non seulement de r\u00e9duire la quantit\u00e9 de photo-initiateur, mais aussi de r\u00e9pondre aux exigences de polym\u00e9risation rapide de la ligne de rev\u00eatement photopolym\u00e9risable.<\/p>\n

Troisi\u00e8mement, les propri\u00e9t\u00e9s physiques et m\u00e9caniques.<\/p>\n

Les propri\u00e9t\u00e9s physiques et m\u00e9caniques du film de peinture photopolym\u00e9risable sont principalement d\u00e9termin\u00e9es par la performance du film de polym\u00e9risation de la r\u00e9sine photopolym\u00e9risable, et les propri\u00e9t\u00e9s physiques et m\u00e9caniques des diff\u00e9rentes vari\u00e9t\u00e9s de peinture photopolym\u00e9risable sont diff\u00e9rentes, le choix de la r\u00e9sine photopolym\u00e9risable est \u00e9galement diff\u00e9rent. Les propri\u00e9t\u00e9s physiques et m\u00e9caniques du film de peinture sont principalement les indicateurs suivants.<\/p>\n

Duret\u00e9 : duret\u00e9 g\u00e9n\u00e9rale des \u00e9poxy-acrylates et des polyesters insatur\u00e9s ; les oligom\u00e8res contenant une structure \u00e0 anneaux de benz\u00e8ne sont \u00e9galement propices \u00e0 l'am\u00e9lioration de la duret\u00e9. Fonctionnalit\u00e9 \u00e9lev\u00e9e, densit\u00e9 de r\u00e9ticulation \u00e9lev\u00e9e, Tg \u00e9lev\u00e9 et duret\u00e9 \u00e9lev\u00e9e.<\/p>\n

Flexibilit\u00e9 : les acryliques ur\u00e9thanes, les acryliques polyesters, les acryliques poly\u00e9thers et les acryliques purs sont g\u00e9n\u00e9ralement plus flexibles. Les oligom\u00e8res contiennent des structures aliphatiques \u00e0 longue cha\u00eene de carbone et sont flexibles. Plus la masse mol\u00e9culaire relative est \u00e9lev\u00e9e, meilleure est la flexibilit\u00e9. Faible densit\u00e9 de r\u00e9ticulation, bonne flexibilit\u00e9. Faible Tg, bonne flexibilit\u00e9.<\/p>\n

R\u00e9sistance \u00e0 l'abrasion, la r\u00e9sine ur\u00e9thane acrylique pr\u00e9sente une bonne r\u00e9sistance \u00e0 l'abrasion. Bonne r\u00e9sistance \u00e0 l'abrasion pour les oligom\u00e8res avec formation facile de liaisons hydrog\u00e8ne entre les mol\u00e9cules. Densit\u00e9 de r\u00e9ticulation \u00e9lev\u00e9e, bonne r\u00e9sistance \u00e0 l'abrasion.<\/p>\n

R\u00e9sistance \u00e0 la traction, les acrylates \u00e9poxy et les polyesters insatur\u00e9s ont une r\u00e9sistance \u00e0 la traction \u00e9lev\u00e9e, g\u00e9n\u00e9ralement une masse mol\u00e9culaire relative plus \u00e9lev\u00e9e, une plus grande polarit\u00e9, moins de flexibilit\u00e9 et des oligom\u00e8res plus r\u00e9ticul\u00e9s ont une r\u00e9sistance \u00e0 la traction plus \u00e9lev\u00e9e.<\/p>\n

R\u00e9sistance aux chocs : les r\u00e9sines acryliques d'ur\u00e9thane, les r\u00e9sines acryliques de polyester, les r\u00e9sines acryliques de poly\u00e9ther et les acryliques purs ont une meilleure r\u00e9sistance aux chocs. Les oligom\u00e8res flexibles \u00e0 faible Tg pr\u00e9sentent g\u00e9n\u00e9ralement une bonne r\u00e9sistance aux chocs.<\/p>\n

Adh\u00e9sion, oligom\u00e8res \u00e0 faible retrait, bonne adh\u00e9rence aux substrats ; les oligom\u00e8res contenant des groupes tels que -OH et -COOH ont une bonne adh\u00e9rence aux m\u00e9taux. Oligom\u00e8res \u00e0 faible tension superficielle, bonne mouillabilit\u00e9 et bon \u00e9talement sur les substrats, bonne adh\u00e9rence.<\/p>\n

R\u00e9sistance au jaunissement : les r\u00e9sines acryliques polyur\u00e9thanes aliphatiques, les r\u00e9sines acryliques poly\u00e9ther et les acryliques pures pr\u00e9sentent une bonne r\u00e9sistance au jaunissement. L'ajout d'agents anti-jaunissement appropri\u00e9s \u00e0 la formulation peut souvent am\u00e9liorer efficacement la r\u00e9sistance au jaunissement des rev\u00eatements photopolym\u00e9ris\u00e9s.<\/p>\n

R\u00e9sistance chimique : les acrylates \u00e9poxy, les acryliques polyur\u00e9thanes et les acryliques polyesters ont tous une bonne r\u00e9sistance chimique, mais les acryliques polyesters sont moins r\u00e9sistants aux alcalis ; l'augmentation de la densit\u00e9 de r\u00e9ticulation pendant le durcissement accro\u00eet la r\u00e9sistance chimique du produit.<\/p>\n

Brillance, les acrylates \u00e9poxy et les polyesters insatur\u00e9s sont tr\u00e8s brillants, la densit\u00e9 de r\u00e9ticulation augmente, la brillance augmente. Tg \u00e9lev\u00e9, indice de r\u00e9fraction \u00e9lev\u00e9 des oligom\u00e8res, bonne brillance.<\/p>\n

Mouillabilit\u00e9 des pigments, les oligom\u00e8res g\u00e9n\u00e9raux modifi\u00e9s par des acides gras et des amines ont une meilleure mouillabilit\u00e9 des pigments, les oligom\u00e8res contenant des -OH et des -COOH ont \u00e9galement une meilleure mouillabilit\u00e9 des pigments.<\/p>\n

Quatri\u00e8mement, le retrait de polym\u00e9risation de la r\u00e9sine photopolym\u00e9risable (oligom\u00e8re).<\/p>\n

Un faible retrait de polym\u00e9risation est propice \u00e0 l'am\u00e9lioration de l'adh\u00e9rence du film polym\u00e9ris\u00e9 au substrat, les fonctionnalit\u00e9s des oligom\u00e8res augmentent, la densit\u00e9 de r\u00e9ticulation augmente, le retrait de polym\u00e9risation augmente \u00e9galement.<\/p>\n

Cinqui\u00e8mement, la temp\u00e9rature de transition vitreuse de l'oligom\u00e8re Tg.<\/p>\n

Oligom\u00e8re Tg \u00e9lev\u00e9, duret\u00e9 g\u00e9n\u00e9ralement \u00e9lev\u00e9e, bonne brillance ; oligom\u00e8re Tg faible, bonne flexibilit\u00e9, r\u00e9sistance aux chocs ou...<\/p>\n

Sixi\u00e8mement, toxicit\u00e9 et irritation.<\/p>\n

L'oligom\u00e8re, en raison de sa masse mol\u00e9culaire relative plus importante, est une r\u00e9sine visqueuse, non volatile, non inflammable et non explosive. Sa toxicit\u00e9 est \u00e9galement faible, de m\u00eame que l'irritation de la peau.<\/p>\n

Produits de la m\u00eame s\u00e9rie<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
IBOMA<\/span><\/a><\/td>\nM\u00e9thacrylate d'isobornyle<\/td>\n7534-94-3<\/td>\n<\/tr>\n
CTFA<\/span><\/td>\nacrylate de m\u00e9thyle (5-\u00e9thyl-1,3-dioxan-5-yl)<\/td>\n66492-51-1<\/td>\n<\/tr>\n
IBOA<\/span><\/a><\/td>\nAcrylate d'isobornyle<\/td>\n5888-33-5<\/td>\n<\/tr>\n
TPGDA<\/a><\/span><\/td>\nDiacrylate de tripropyl\u00e8ne glycol<\/td>\n42978-66-5<\/td>\n<\/tr>\n
PETA<\/a><\/span><\/td>\nTriacrylate de penta\u00e9rythritol<\/td>\n3524-68-3<\/td>\n<\/tr>\n
TMPTMA<\/span><\/a><\/td>\nTrim\u00e9thacrylate de trim\u00e9thylolpropane<\/td>\n3290-92-4<\/td>\n<\/tr>\n
THFA<\/span><\/a><\/td>\nAcrylate de t\u00e9trahydrofurfuryle<\/td>\n2399-48-6<\/td>\n<\/tr>\n
NPGDA<\/a><\/span><\/td>\nDiacrylate de n\u00e9opentyle et de glycol<\/td>\n2223-82-7<\/td>\n<\/tr>\n
TEGDA<\/span><\/td>\nDiacrylate de tri\u00e9thyl\u00e8ne glycol<\/td>\n1680-21-3<\/td>\n<\/tr>\n
TMPTA<\/span><\/a><\/td>\nTriacrylate de trim\u00e9thylolpropane<\/td>\n15625-89-5<\/td>\n<\/tr>\n
LMA<\/a><\/span><\/td>\nM\u00e9thacrylate de dod\u00e9cyle \/ m\u00e9thacrylate de lauryle<\/td>\n142-90-5<\/td>\n<\/tr>\n
TEGDMA<\/a><\/span><\/td>\nDim\u00e9thacrylate de tri\u00e9thyl\u00e8ne glycol<\/td>\n109-16-0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/h2>\n

Contactez-nous d\u00e8s maintenant !<\/b><\/strong><\/h2>\n

Si vous avez besoin de COA, MSDS ou TDS, veuillez remplir vos coordonn\u00e9es dans le formulaire ci-dessous, nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel info@longchangchemical.com<\/a><\/span> 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.<\/b><\/strong><\/h4>","protected":false},"excerpt":{"rendered":"

Quels sont les \u00e9l\u00e9ments de s\u00e9lection des oligom\u00e8res UV pour les formulations de vernis photopolym\u00e9risables ? Les vernis photopolym\u00e9risables, \u00e9galement connus sous le nom de vernis UV, utilisent la lumi\u00e8re UV comme source d'\u00e9nergie pour polym\u00e9riser le vernis. Ils peuvent \u00eatre durcis rapidement sur des substrats tels que le papier, le plastique, le cuir et le bois sans n\u00e9cessiter de chaleur. Les vernis photopolym\u00e9risables [...]<\/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-5401","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nWhat are the elements in selecting UV oligomers for light-curing coating formulations? - Longchang Chemical<\/title>\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\/what-are-the-elements-in-selecting-uv-oligomers-for-light-curing-coating-formulations\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the elements in selecting UV oligomers for light-curing coating formulations? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"What are the elements in selecting UV oligomers for light-curing coating formulations? 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Light curing coatings are also known as UV curing coatings, which use UV light as the energy source for curing the coating. They can be cured quickly on substrates such as paper, plastic, leather and wood without the need for heat. 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