{"id":8932,"date":"2025-05-08T13:38:01","date_gmt":"2025-05-08T11:38:01","guid":{"rendered":"https:\/\/www.adesiviesigillanti.it\/archive\/archive-2025\/issue-2-2025\/2-wacker\/"},"modified":"2025-05-17T14:57:41","modified_gmt":"2025-05-17T12:57:41","slug":"2-wacker","status":"publish","type":"page","link":"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/2-wacker\/","title":{"rendered":"2-WACKER"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"8932\" class=\"elementor elementor-8932\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6964fe9 e-con-full e-flex e-con e-parent\" data-id=\"6964fe9\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-34f62b8 e-con-full e-flex e-con e-child\" data-id=\"34f62b8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1b22916 elementor-widget elementor-widget-heading\" data-id=\"1b22916\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">new silane-terminated polymers for sealants and adhesives<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3153df1 elementor-widget elementor-widget-text-editor\" data-id=\"3153df1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5 style=\"text-align: center\"><span style=\"color: #000000\"><strong>Florian Degenhart<br \/>WACKER<\/strong><\/span><\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3faa00d elementor-widget elementor-widget-image\" data-id=\"3faa00d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"287\" src=\"https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/1_WACKER-AS-2-25.png\" class=\"attachment-large size-large wp-image-8516 no-lazyload\" alt=\"\" srcset=\"https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/1_WACKER-AS-2-25.png 600w, https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/1_WACKER-AS-2-25-300x144.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-73b941a elementor-widget elementor-widget-text-editor\" data-id=\"73b941a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\" style=\"text-align: center\"><strong>Laboratory tests show that sealants based on the Geniosil<span class=\"s1\">\u00ae <\/span>STP-E 340 binder exhibit very good <\/strong><strong>elastic recovery properties. Wacker premiered the product at the European Coatings Show in <\/strong><strong>March<\/strong><\/p><p class=\"p1\">Wacker showcased a new generation of silane-terminated polyethers at the last European Coatings Show: Geniosil<span class=\"s1\">\u00ae <\/span>STP-E 140 and STP-E 340. These novel polymers can be formulated into tin-free sealants and adhesives that\u00a0are highly elastic and achieve a low modulus of elasticity \u2013 properties that are most desirable in the construction sector and a first in the adhesives and sealants world.<br \/>Tin-free assembly adhesives are yet another area of application that can benefit from these products. With these polymers, property profiles are now possible that comparable binders fail to provide. These silane-crosslinking binders are based on the company\u2019s state-of-the-art Alpha<span class=\"s1\">3 <\/span>technology. The polymers in question consist of both alpha and gammasilyl groups.<br \/>The alpha-silyl groups lead to greater reactivity, while the slower-reacting gamma ends have a positive impact on elastic recovery. This innovative technology thus combines the advantages of both alpha and gamma-silane-crosslinking polyethers.<br \/>Just like a conventional alpha-silaneterminated polymer, the combination of the two silane-terminated polyethers does not require a tin catalyst for curing. During crosslinking, the highly reactive alpha end literally pulls in the gamma end into the swifter curing process, which generally displays slower reactivity.<\/p><figure id=\"attachment_8527\" aria-describedby=\"caption-attachment-8527\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-8527 no-lazyload\" src=\"https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/2_WACKER-AS-2-25.png\" alt=\"\" width=\"600\" height=\"347\" srcset=\"https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/2_WACKER-AS-2-25.png 600w, https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/2_WACKER-AS-2-25-300x174.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-8527\" class=\"wp-caption-text\"><strong>Both polymers Geniosil<span class=\"s1\">\u00ae <\/span>STP-E 140 and STP-E 340 can be used, for example, to formulate tin-free<\/strong><br \/><strong>assembly adhesives<\/strong><\/figcaption><\/figure><p class=\"p1\">After crosslinking, Geniosil<span class=\"s1\">\u00ae <\/span>STP-E 140 and STP-E 340 are highly elastic.<br \/>Application tests show that the silaneterminated polyethers adhere to a wide range of varying substrates. Both binders can be processed into creep-resistant, fastcuring adhesives. They also facilitate the production of low-modulus sealants. These are flexible and even without the application of much force, retain elasticity. Moreover, they also exhibit good elastic recovery, i.e. they return to their original length after exposure to prolonged elongation \u2013 a combination of properties that is unusual for conventional alpha-silanes.<br \/>The two binders differ in terms of viscosity. At 10,000 millipascal seconds, Geniosil<span class=\"s1\">\u00ae <\/span>STP-E 140 is more fluidlike than STP-E 340, which has a viscosity of 30,000 millipascal seconds.<br \/>This makes it easier to tailor the finished product to meet the requirements of the relevant application. Adhesive and sealant formulators can process these polymers in a similar fashion as conventional silane-terminated polyethers. Even formulations without solvents and plasticizers are possible.<br \/>Incompatibilities with ester-based additives are eliminated, as the polymers crosslink without a tin catalyst. This increases the scope for novel formulation developments<\/p><p class=\"p1\">and improves the storage stability of the formulated<\/p><p class=\"p1\">finished product.<\/p><p class=\"p1\">Both binders can be blended with all Geniosil<span class=\"s1\">\u00ae <\/span>silaneterminated polyethers. It is thus possible to tailor the crosslinking rate, skin-over time, and the mechanical and elastic properties of the finished products to precisely meet the requirements of the end user. The new silaneterminated polyethers therefore can now address a diverse range of tin-free formulated adhesives and sealants.<br \/>Adhesives and sealants based on these polymers can be processed and applied without any need to change existing mixing or processing methods. Particularly the craftsman will benefit from the characteristic ease in handling such hybrid products.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-161b3b7 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"161b3b7\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6dc7001 elementor-widget elementor-widget-text-editor\" data-id=\"6dc7001\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5 style=\"text-align: center\"><strong><a href=\"https:\/\/www.adesiviesigillanti.it\/wp-content\/uploads\/2025\/05\/2_WACKER-AS-2-25.pdf\"><span style=\"color: #f0d30a\">SCARICA IL PDF<\/span><\/a><\/strong><\/h5><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4a67967f e-con-full e-flex e-con e-child\" data-id=\"4a67967f\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7eca143a elementor-widget__width-inherit elementor-widget elementor-widget-heading\" data-id=\"7eca143a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Other contents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6315dc1b elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"6315dc1b\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1dc5b475 elementor-widget elementor-widget-heading\" data-id=\"1dc5b475\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/1-vinavil\/\">VINAVIL<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66fb01cb elementor-widget elementor-widget-heading\" data-id=\"66fb01cb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/1-vinavil\/\">The new frontier of non-structural two-component adhesives for wood compliant with the new EN 17619 regulation<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12cca987 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"12cca987\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-779bdebe elementor-widget elementor-widget-heading\" data-id=\"779bdebe\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/3-hb-fuller\/\">HB FULLER\n<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1470ac50 elementor-widget elementor-widget-heading\" data-id=\"1470ac50\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/3-hb-fuller\/\">Packaging adhesives and trend in 2025<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6111372 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"6111372\" 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data-id=\"374a77bd\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cd369e elementor-widget elementor-widget-heading\" data-id=\"9cd369e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/6-mapei\/\">MAPEI<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1bee4a90 elementor-widget elementor-widget-heading\" data-id=\"1bee4a90\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/6-mapei\/\">The importance of sustainability for Mapei<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-785c27dc elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"785c27dc\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>new silane-terminated polymers for sealants and adhesives Florian DegenhartWACKER Laboratory tests show that sealants based on the Geniosil\u00ae STP-E 340 binder exhibit very good elastic recovery properties. Wacker premiered the product at the European Coatings Show in March Wacker showcased a new generation of silane-terminated polyethers at the last European Coatings Show: Geniosil\u00ae STP-E 140 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":8820,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-8932","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2-WACKER - Adesivi &amp; Sigillanti<\/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:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2025\/issue-2-2025\/2-wacker\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2-WACKER - Adesivi &amp; Sigillanti\" \/>\n<meta property=\"og:description\" content=\"new silane-terminated polymers for sealants and adhesives Florian DegenhartWACKER Laboratory tests show that sealants based on the Geniosil\u00ae STP-E 340 binder exhibit very good elastic recovery properties. 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