{"id":166491,"date":"2025-06-04T11:34:33","date_gmt":"2025-06-04T09:34:33","guid":{"rendered":"https:\/\/concentrol.com\/?p=166491"},"modified":"2025-06-13T09:23:23","modified_gmt":"2025-06-13T07:23:23","slug":"tensioactifs-silicones-a-valeur-ajoutee","status":"publish","type":"post","link":"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/fr\/tensioactifs-silicones-a-valeur-ajoutee\/","title":{"rendered":"TENSIOACTIFS SILICON\u00c9S \u00c0 VALEUR AJOUT\u00c9E"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text uncode_shortcode_id=\u00a0\u00bb148715″]CONCENTROL STB PU-2248<\/strong>
\nComme le d\u00e9montre l’industrie, le polyur\u00e9thane est un mat\u00e9riau dot\u00e9 d’une \u00e9norme vari\u00e9t\u00e9 d’applications. Dans ce contexte, des propri\u00e9t\u00e9s telles que l\u2019uniformit\u00e9 de la structure cellulaire, la stabilit\u00e9 dimensionnelle et la compatibilit\u00e9 entre les composants du syst\u00e8me ne sont pas de simples aspects techniques, mais des param\u00e8tres critiques qui d\u00e9terminent les performances finales du produit. Un exemple en est donn\u00e9 avec la conception de notre stabilisant silicone STB PU-2248.<\/p>\n

Ce tensioactif de silicone a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour aller au-del\u00e0 des performances conventionnelles. Son action permet d\u2019obtenir une structure cellulaire fine, homog\u00e8ne et stable, optimisant ainsi les propri\u00e9t\u00e9s m\u00e9caniques du polyur\u00e9thane. En outre, le STB PU-2248 pr\u00e9sente d\u2019excellentes propri\u00e9t\u00e9s \u00e9mulsifiantes et une grande affinit\u00e9 pour l\u2019incorporation des diff\u00e9rents additifs de la formulation du polyur\u00e9thane, ce qui am\u00e9liore la compatibilit\u00e9 des phases et la dispersion des composants du syst\u00e8me.<\/p>\n

L\u2019ing\u00e9nierie de l\u2019imperceptible<\/strong>
\nLe STB PU-2248 joue un r\u00f4le d\u00e9cisif dans la phase initiale du processus de moussage, en intervenant de mani\u00e8re contr\u00f4l\u00e9e dans des formulations qui, en raison de leur nature r\u00e9active, ont tendance \u00e0 pr\u00e9senter une instabilit\u00e9. Gr\u00e2ce \u00e0 sa forte polarit\u00e9, ce tensioactif de silicone poss\u00e8de une remarquable capacit\u00e9 \u00e9mulsifiante, ce qui facilite la formation d’une \u00e9mulsion plus homog\u00e8ne et stable. Cette action favorise la nucl\u00e9ation et le contr\u00f4le cellulaire, aboutissant \u00e0 une structure cellulaire fine, uniforme et bien r\u00e9partie, dont la qualit\u00e9 est visible dans la mousse obtenue.<\/p>\n

Dans les formulations \u00e0 base d\u2019eau ou utilisant des agents gonflants chimiques, le STB PU-2248 agit comme un stabilisant de puissance moyenne \u00e0 faible, ce qui en fait un stabilisant id\u00e9al pour les syst\u00e8mes n\u00e9cessitant un \u00e9quilibre entre le pourcentage de cellules ferm\u00e9es et la stabilit\u00e9 dimensionnelle.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Produit<\/strong><\/td>\nSTB PU-2248<\/strong><\/td>\n<\/tr>\n
TYPE<\/strong><\/td>\nTensioactif de silicone<\/td>\n<\/tr>\n
POLARIT\u00c9<\/strong><\/td>\n\u00c9lev\u00e9e<\/td>\n<\/tr>\n
STRUCTURE CELLULLAIRE<\/strong><\/td>\nFine et uniforme<\/td>\n<\/tr>\n
CAPACIT\u00c9 STABILISATRICE<\/strong><\/td>\nMoyenne \u00e0 faible<\/td>\n<\/tr>\n
STABILIT\u00c9 DIMENSIONNELLE<\/strong><\/td>\nBonne<\/td>\n<\/tr>\n
COMPATIBILIT\u00c9<\/strong><\/td>\nSyst\u00e8mes Water-blown et HFO<\/td>\n<\/tr>\n
APPLICATIONS RECOMMAND\u00c9ES<\/strong><\/td>\nPanneaux discontinus, semelles PU, mousse PU<\/td>\n<\/tr>\n
TY<\/strong>PE DE MOUSSE SPRAY<\/strong><\/td>\nCellulle ferm\u00e9e \u2013 2 lb\/ft3<\/sup> (32 kg\/m3<\/sup>)<\/td>\n<\/tr>\n
IMPACT ADDITIONNEL<\/strong><\/td>\nAm\u00e9liore les propri\u00e9t\u00e9s ignifuges<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Proposition de valeur du STB PU-2248<\/strong>
\nUn tensioactif ne peut pas \u00eatre \u00e9valu\u00e9 uniquement dans des conditions de laboratoire contr\u00f4l\u00e9es. Sa v\u00e9ritable valeur se r\u00e9v\u00e8le dans des environnements de formulation r\u00e9els, o\u00f9 il interagit avec un r\u00e9seau complexe de variables. Les facteurs les plus d\u00e9terminants pour ses performances sont :<\/p>\n

    \n
  • La chimie de base du polyol et de l’isocyanate<\/li>\n
  • La nature chimique de l\u2019agent gonflant<\/li>\n
  • L\u2019interaction avec les catalyseurs<\/li>\n
  • L\u2019efficacit\u00e9 du processus de m\u00e9lange, d\u2019expansion et de durcissement<\/li>\n<\/ul>\n

    Le STB PU-2248 a \u00e9t\u00e9 con\u00e7u en tenant compte de cette complexit\u00e9 op\u00e9rationnelle. Sa formulation lui permet de maintenir des performances stables dans des syst\u00e8mes exigeants et dans des conditions de traitement difficiles.<\/p>\n

    Il offre d\u2019excellentes performances dans la fabrication de panneaux discontinus ou d\u2019appareils m\u00e9nagers (appliances<\/em>), o\u00f9 des param\u00e8tres tels que la fluidit\u00e9 (flowability<\/em>) et l\u2019uniformit\u00e9 cellulaire sont essentiels pour garantir la qualit\u00e9 du produit final. De m\u00eame, dans les applications de mousse projet\u00e9e, comme dans les syst\u00e8mes \u00e0 cellules ferm\u00e9es avec une densit\u00e9 de 2 lb\/ft\u00b3 (\u224832 kg\/m\u00b3), il facilite la g\u00e9n\u00e9ration d\u2019une structure cellulaire homog\u00e8ne, ferm\u00e9e et fine, optimisant ainsi les propri\u00e9t\u00e9s thermiques et m\u00e9caniques du syst\u00e8me.<\/p>\n

    De plus, sa stabilit\u00e9 chimique dans des formulations acides ou dans des conditions agressives le positionne comme un tensioactif de nouvelle g\u00e9n\u00e9ration, capable de s\u2019int\u00e9grer dans des formulations tr\u00e8s exigeantes sans compromettre l\u2019int\u00e9grit\u00e9 structurelle, les standards techniques ni la performance du syst\u00e8me.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    [vc_row][vc_column][vc_column_text uncode_shortcode_id=\u00a0\u00bb148715″]CONCENTROL STB PU-2248 Comme le d\u00e9montre l’industrie, le polyur\u00e9thane est un mat\u00e9riau dot\u00e9 d’une \u00e9norme vari\u00e9t\u00e9 d’applications. Dans ce […]<\/p>\n","protected":false},"author":40,"featured_media":166540,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[1024],"tags":[736,1201,1166],"class_list":["post-166491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pu-additives-fr","tag-polyurethane-fr","tag-pu-additives-fr","tag-silicone-surfactants-fr"],"acf":[],"yoast_head":"\nTENSIOACTIFS SILICON\u00c9S \u00c0 VALEUR AJOUT\u00c9E<\/title>\n<meta name=\"description\" content=\"Concentrol - Chemical Solutions\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/concentrol.com\/fr\/tensioactifs-silicones-a-valeur-ajoutee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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