{"id":4937,"date":"2021-12-27T13:30:08","date_gmt":"2021-12-27T13:30:08","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=4937"},"modified":"2026-04-28T10:41:54","modified_gmt":"2026-04-28T10:41:54","slug":"commonly-used-reagents-ethyl-vinyl-ether","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/nl\/commonly-used-reagents-ethyl-vinyl-ether\/","title":{"rendered":"Veelgebruikte reagentia-ethylvinylether"},"content":{"rendered":"<!-- lc-qa-start -->\n<p><strong>Snel antwoord:<\/strong> For paint and coating topics, formulators usually compare flow, substrate fit, surface quality, and durability together because the same adjustment can improve one property while weakening another.<\/p>\n<!-- lc-qa-end -->\n\n\n<p>\u3010Engelse naam\u3011Ethyl Vinyl Ether<\/p>\n\n\n\n<p>Moleculaire formule C4H8O<\/p>\n\n\n\n<p>Moleculair gewicht 72,11<\/p>\n\n\n\n<p>\u3010CAS registratienummer\u3011[109-92-2]<\/p>\n\n\n\n<p>Structuurformule\u3011CH3CH2OCH=CH2<\/p>\n\n\n\n<p>[Fysische eigenschappen] bp 33 oC, d 0,753 g\/cm3. Het is oplosbaar in de meeste organische oplosmiddelen en kan worden gebruikt in een verscheidenheid aan organische oplosmiddelen.<\/p>\n\n\n\n<p>[Bereiding en grondstof] Dit reagens wordt verkocht in chemische reagensbedrijven in binnen- en buitenland.<\/p>\n\n\n\n<p>[Voorzorgsmaatregelen] Dit reagens is een zeer vluchtige en ontvlambare chemische stof. Het wordt aanbevolen om het op een droge plaats met een lage temperatuur te bewaren en het in een zuurkast te gebruiken.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Ethylvinylether wordt voornamelijk gebruikt als beschermende groep van de hydroxylgroep, vinyltransferreagens en neemt deel aan de cycliseringsadditiereactie in organische synthese.<\/p>\n\n\n\n<p>Van de vele beschermende groepen voor hydroxylgroepen is de \u03b1-ethoxy ethylether (EE), gevormd door ethylvinylether en hydroxy, een van de meest gebruikte en handige beschermende groepen. De reactie vereist over het algemeen een sterk zure katalysator, TFA en TsOH kunnen hiervoor worden gebruikt, de meest gebruikte is PPTS. De reactie wordt meestal voltooid door enkele uren bij kamertemperatuur te roeren. In de meeste gevallen is de opbrengst van het product hoger dan 95% (Formule 1) [1,2]. De EE-beschermingsgroep kan de deprotectiereactie gemakkelijk voltooien onder zure omstandigheden. PPTS-EtOH en aq. HCl-MeOH zijn aanbevolen methoden (vergelijking 2)<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095147_88752.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Onder invloed van de kwikacetaatderivaatkatalysator ondergaan ethylvinylether en hydroxyl een vinyltransferreactie om het overeenkomstige vinyletherproduct te genereren (Formule 3) [5]. Als een palladiummetaalkatalysator wordt gebruikt, kan het gebruik van een kwikmetaalkatalysator effectief worden vermeden (Formule 4) [6]. Deze reactie is zinvoller omdat het product verdere condensatiereacties of olefine metathese kan ondergaan [7,8].<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095200_82254.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Ethylvinylether en allylhydroxyl ondergaan een vinyltransferreactie om het overeenkomstige vinyletherproduct te genereren. De reactie wordt meestal voltooid onder katalyse van kwikacetaat. Verhitting van het product in tolueen of xyleen kan de overeenkomstige Claisen-herschikking induceren, waardoor de reactie een belangrijke synthetische waarde heeft. Onder normale omstandigheden kan het tweestapsreactieproces worden voltooid onder de omstandigheden van \"koken in \u00e9\u00e9n pan\" (vergelijking 5, vergelijking 6) [9~11].<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095310_54634.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>In aanwezigheid van Lewiszuur katalysatoren kan ethylvinylether ook de overeenkomstige cyclisatiereactie ondergaan [12,13].<\/p>\n\n\n<!-- lc-commercial-start -->\n<h2>A practical checklist for coating formulation decisions<\/h2>\n<p>In conventional coating work, technical buyers usually move fastest when they define the film-performance target first and then review rheology, substrate compatibility, additives, and long-term durability as one system instead of isolated tweaks.<\/p>\n<ul>\n<li><strong>Start from the application scenario:<\/strong> furniture, powder coating, industrial paint, and waterborne systems often reward different formulation priorities.<\/li>\n<li><strong>Check surface quality and process stability together:<\/strong> leveling, wetting, foam control, and drying often interact strongly.<\/li>\n<li><strong>Review the film after full cure or drying:<\/strong> adhesion, hardness, weatherability, and color stability usually decide the commercial result.<\/li>\n<li><strong>Use targeted additive screening:<\/strong> wetting, leveling, defoaming, and wear-resistance additives work best when the defect is clearly defined.<\/li>\n<\/ul>\n<h3>Aanbevolen productreferenties<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> Een gebalanceerd ont schuimmiddel referentie voor watergedragen coatings en veel algemene schuimcontrole schermen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Handig wanneer compatibiliteit van drukinkt en UV-inkt belangrijk is bij het ontluchtingsscherm.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> Een krachtigere optie voor procesontschuiming wanneer hardnekkig schuim zelfs onder zwaardere omstandigheden standhoudt.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/nl\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> Een sterke bevochtigingsmiddelreferentie voor inkten, coatings en het bevochtigen van moeilijke substraten.<\/li>\n<\/ul>\n<h3>Veelgestelde Vragen voor kopers en formuleringsdeskundigen<\/h3>\n<p><strong>Why can a coating with good initial appearance still fail later?<\/strong><br \/>Because many failures show up only after full cure, storage, or service exposure, when adhesion, flexibility, or weatherability becomes the limiting factor.<\/p>\n<p><strong>Should coating additives be chosen one by one outside the full formula?<\/strong><br \/>It is usually safer to screen them inside the real formula because resin choice, pigments, and the rest of the additive package can change the result.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>\u3010English name\u3011Ethyl Vinyl Ether \u3010Molecular formula\u3011 C4H8O \u3010Molecular Weight\u301172.11 \u3010CAS Registration Number\u3011[109-92-2] \u3010Structural formula\u3011CH3CH2OCH=CH2 [Physical properties] bp 33 oC, d 0.753 g\/cm3. It is soluble in most organic solvents and<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-4937","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>Commonly used reagents-ethyl vinyl ether - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"\u3010English name\u3011Ethyl Vinyl Ether \u3010Molecular formula\u3011 C4H8O \u3010Molecular Weight\u301172.11 \u3010CAS Registration Number\u3011[109-92-2] \u3010Structural formula\u3011CH3CH2OCH=CH2...\" \/>\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\/nl\/commonly-used-reagents-ethyl-vinyl-ether\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Commonly used reagents-ethyl vinyl ether - 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