{"id":15563,"date":"2024-09-22T13:37:17","date_gmt":"2024-09-22T10:07:17","guid":{"rendered":"https:\/\/imenpol.com\/blog\/en\/?p=15563"},"modified":"2024-12-30T14:44:43","modified_gmt":"2024-12-30T11:14:43","slug":"handling-polyurethane-raw-materials","status":"publish","type":"post","link":"https:\/\/imenpol.com\/blog\/en\/educational\/handling-polyurethane-raw-materials\/","title":{"rendered":"Handling polyurethane raw materials"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15563\" class=\"elementor elementor-15563\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61edf14 e-flex e-con-boxed e-con e-parent\" data-id=\"61edf14\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7191e04 content-table elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"7191e04\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;container&quot;:&quot;.table-contents&quot;,&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h6 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of contents\t\t\t<\/h6>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__7191e04\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-62d24ad  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"62d24ad\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a6889dc elementor-widget elementor-widget-text-editor\" data-id=\"a6889dc\" 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<h2>Handling polyurethane raw materials (isocyanates and polyols)<\/h2><p>Time and temperature are the two primary factors that influence product quality. Storage in a warehouse at a constant temperature of 25\u00b0C would be best for most polyurethane raw materials, although this isn\u2019t always practical. In any case, some controls must be in place to prevent materials from experiencing the coldest temperatures of winter or the extreme heat that can occur in a warehouse in the summer. The storage requirements for raw materials differ based on their chemistry and delivery form.<\/p><p>Exposure of polyurethane dispersions to excessively low or high temperatures can significantly influence the performance of these products. The typical recommended storage temperature range for polyurethane dispersions is 5-25\u00b0C.<\/p><p>Process control is important in any weather, but for polyurethane foam users, fall and winter are particularly important times to pay attention to chemical temperatures. The changes that occur upon exposure to low temperatures range from an increase in viscosity of the polymer. The polymer with high viscosity cannot be dispersed upon stirring and cannot be transferred upon pumps. Generally speaking, chemicals shouldn\u2019t be stored at temperatures below 10.<\/p><p>If polyurethane raw materials are subjected to elevated temperatures for an extended period of time, performance can be reduced. However, this change it is not as apparent as with cold temperature exposures. The molecular weight of the polymer backbone can see a reduction, which often leads to a drop in initial strength or a decrease in elevated temperature performance.<\/p><p>Isocyanates are products with limited shelf life. Shelf-life refers to the time period that you can store that polymer (PU) without loss of its qualities. Depending upon the isomer and oligomer composition, specific storage temperature and shelf life must be applied.<\/p><p>In isocyanates, if the storage temperature falls below recommended temperature, some crystallization will occur. Polymeric and modified pure MDI products that has been frozen, will exhibit the same dimerization characteristics as pure MDI. Unless proper action is taken to heat or melt the product. Crystallized MDI material can be re-melted at 50\u00a0to 70. In other words, crystallized isocyanate can be melted, but dimer cannot be removed by heating.<\/p><p>Polyols are more freeze-sensitive than isocyanates, primarily, the ideal temperature for polyol storage is about 22\u00a0to 24. However, it is recommended that:<\/p><ol><li>Gently rock tanks during warming process to evenly distribute chemical temperature. This can be done with rotating polyol tank.<\/li><li>If the polyol material exposed to temperatures below -10, laboratory tests should be performed to double check processing parameters; after confirming characteristic parameters it can enter the production line.<\/li><li>To warm polyol tanks, do not expose tanks or cylinders to open flame or temperatures above 49\u00b0C.<\/li><li>Another way to heat polyol barrels is to use heating elements which can be carried out by setting the temperatures between 60up to 80\u00a0.<\/li><li>During colder months, it is extremely important to remember the temperature sensitivity of polyols; so store your sets in a warm room.<\/li><li>Rock each tank before loading to prevent any possibility of phase separation.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-124f380 e-flex e-con-boxed e-con e-parent\" data-id=\"124f380\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d74707a elementor-widget elementor-widget-image\" data-id=\"d74707a\" 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=\"482\" height=\"220\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Picture2.jpg\" class=\"attachment-full size-full wp-image-15567\" alt=\"\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Picture2.jpg 482w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Picture2-300x137.jpg 300w\" sizes=\"(max-width: 482px) 100vw, 482px\" \/>\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Time and temperature are the two primary factors that influence product quality. Storage in a warehouse at a constant temperature of 25\u00b0C would be best for most polyurethane raw materials, although this isn\u2019t always practical. <\/p>\n","protected":false},"author":4,"featured_media":15565,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-15563","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-educational"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Handling polyurethane raw materials - Imenpol blog<\/title>\n<meta name=\"description\" content=\"Imenpol blog\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/imenpol.com\/blog\/en\/educational\/handling-polyurethane-raw-materials\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Handling polyurethane raw materials - 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