{"id":3031,"date":"2019-12-06T16:01:48","date_gmt":"2019-12-06T15:01:48","guid":{"rendered":"https:\/\/academy.bormawachs.com\/?page_id=3031"},"modified":"2020-01-08T17:54:12","modified_gmt":"2020-01-08T16:54:12","slug":"resine-strutturali-trasparenti","status":"publish","type":"page","link":"https:\/\/academy.bormawachs.com\/en\/resine-strutturali-trasparenti\/","title":{"rendered":"RESINS"},"content":{"rendered":"

[vc_row][vc_column][vc_custom_heading text=”Structural clear resin” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]Scientific study activities and laboratory research and development allow updating our formulations continuously.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Special formulation based on epoxy resins” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]It is possible to prepare special formulations based on bicomponent epoxy resins characterized by an\u00a0exceptional transparency<\/strong>, suitable for\u00a0filling cavities<\/strong>\u00a0and imperfections in materials of various nature, useful for\u00a0embedding to decorative purposes<\/strong>\u00a0and as\u00a0adhesives<\/strong>\u00a0for mixtures of stones, grits and powders. Formulations based on epoxy resin\u00a0can be colored<\/strong>\u00a0and also used as a transparent structural material to make\u00a0objects, artistic artefacts, tables and plastic components.<\/strong>[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3073,3075,3070″ img_size=”full” autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Key features” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]The Borma Glass epoxy system has exceptional properties:<\/p>\n

    \n
  1. no emission of by-products<\/strong>in the polymerization reaction and very low contraction during polymerization<\/li>\n
  2. very high adhesion<\/strong>on a variety of surfaces<\/li>\n
  3. low viscosity<\/strong>and very easy to mix and pour<\/li>\n
  4. application flexibility<\/strong>for which it is possible to make small and large objects, with the application technique in successive layers.<\/li>\n
  5. very low linear shrinkage<\/strong>, almost zero in the case of conglomeration casting<\/li>\n
  6. excellent hardness and surface wettability<\/strong>: it is therefore possible to carry out calibration, sanding, polishing operations with abrasives and to use water-based scratch-resistant paints for the glossy finish.<\/li>\n
  7. high compatibility with transparent, fluorescent, iridescent dyes<\/strong>or with other special characteristics<\/li>\n<\/ol>\n

    [\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3037,3041″ img_size=”full” speed=”4000″ autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Epoxy Resins \u2013 Component A” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]Basic epoxy resin is very viscous and unsuitable for easy handling use in laboratory except as a thick glue for specialized applications. A casting resin is a low viscosity clear modified epoxy resin.\u00a0 Modifications include additives to promote leveling, air detrainment, resiliency, toughness, high impact resistance, and recoatability, without removing amine blush or sanding between coats.\u00a0 Shelf life is unlimited in closed containers stored below 32 \u00b0C.\u00a0 Haziness and crystallization will occur if stored at cold temperatures (below 10 \u00b0C) for prolonged periods.\u00a0 Immersing the closed container in hot tap water and heating to 50 \u00b0C or above will bring the resin back to a clear state.\u00a0 Neither crystallization nor heating will adversely affect the product.\u00a0 Crystallization will reoccur if the material is not totally brought back to a clear bright state after heating. Simply warming cold material to room temperature will not melt the crystals.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_single_image image=”3046″ img_size=”full”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Hardeners \u2013 Component B” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]Linear or crosslinked epoxy polymers are obtained by reaction of the epoxy monomers with co-monomers (\u201chardeners\u201d) and\/or initiators. Epoxy polymers can be produced by step or chain polymerizations or, eventually, by a combination of both mechanisms. Amines are the most commonly used room temperature curing agents\/hardeners for epoxides. Epoxy-amine step- growth polymerization proceeds via a step-by-step succession of elementary reactions between reactive sites. The number of reactive sites per monomer (functionality) and the molar ratio between co-reactive sites are the main parameters that control the polymer structure. To obtain linear polymers, the reactants must be bifunctional; monofunctional reactants interrupt the polymer growth. A condition to obtain crosslinked polymers is that at least one of the monomers has a functionality higher than 2.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3068,2888,3069″ img_size=”full” autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Mixture Ratio” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]The ratio of epoxy-polyamine, taking into account the various molecular weights and densities involved, determines the final properties of the resin. Varying the recommended ratio will leave unreacted sites, the resultant cured resin will have lower strength as it is not as completely crosslinked.<\/p>\n

    Epoxy hardeners are not catalysts.\u00a0 Catalysts promote reactions but do not chemically become a part of the finished product.\u00a0 Epoxy hardeners mate with the epoxy resin, greatly contributing to the ultimate properties of the cured system.<\/p>\n

    [\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3076,3077″ img_size=”full” speed=”4000″ autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Curing Time” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]Curing time of an epoxy system is dependent upon the reactivity of the amine hydrogen atoms.\u00a0 Cure time can be altered only by selecting a different hardener, adding an accelerator in systems that can accommodate one, or by changing the temperature and mass of the resin\/hardener mix.<\/p>\n

    The epoxy curing reaction is exothermic.\u00a0 This means that it gives off heat as it cures.\u00a0 The rate at which the epoxy resin cures is dependent upon the curing temperature.\u00a0 For example, if an epoxy system takes 3 hours to become tack free at 20 \u00b0C, it will be tack free in 1.5 hours at 30\u00b0C or tack free in 6 hours at 10 \u00b0C.\u00a0 Pot life and working time are greatly influenced by the initial temperature of the mixed resin and hardener.<\/p>\n

    The working time of the resin depends also by the quantity of the mixture and heat exchanges. If the heat generated is immediately dissipated to the environment (as occurs in thin films) the reaction speed proceeds uniform. If the mixture is confined (as in bulk containers) the the temperature raises, accelerating the reaction speed. Experienced users either mix batches that will be applied almost immediately or increase the surface area to slow the reaction.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3074,3072,3071″ img_size=”full” autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Vitrification” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]After gelation the reaction speed slows down as hardness increases.\u00a0 Chemical reactions proceed more slowly in the solid state.\u00a0 From the soft sticky gel the system gets harder, slowly losing its stickiness.\u00a0 It becomes tack free and continues to become harder and stronger as time passes.<\/p>\n

    At room temperatures, generally speaking, a polyamine-epoxy system will reach about 60% to 80% of ultimate strength after 24 hours.\u00a0 Curing then proceeds slowly over the next several weeks, finally reaching a point where no further curing will occur without a significant increase in temperature.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”3066,3060,3063″ img_size=”full” speed=”2000″ autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_single_image image=”2901″ img_size=”full” add_caption=”yes” onclick=”custom_link” img_link_target=”_blank” css_animation=”left-to-right” link=”https:\/\/www.bormawachs.com\/”][\/vc_column][vc_column width=”1\/2″][vc_column_text]<\/p>\n

    HOME<\/a> > MATTER<\/a> > RESEARCH<\/a> > RESINS<\/p>\n

    [\/vc_column_text][\/vc_column][\/vc_row]<\/p>","protected":false},"excerpt":{"rendered":"

    [vc_row][vc_column][vc_custom_heading text=”Structural clear resin” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]Scientific study activities and laboratory research and development allow updating our formulations continuously.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”3″][vc_column][vc_separator style=”shadow”][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]\u00a0[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Special formulation based on epoxy resins” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]It is possible to<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3031","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3031","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/comments?post=3031"}],"version-history":[{"count":39,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3031\/revisions"}],"predecessor-version":[{"id":3090,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3031\/revisions\/3090"}],"wp:attachment":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/media?parent=3031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}