{"id":30347,"date":"2026-08-17T09:00:30","date_gmt":"2026-08-17T09:00:30","guid":{"rendered":"https:\/\/sailadditive.com\/?p=30347"},"modified":"2026-08-17T07:49:50","modified_gmt":"2026-08-17T07:49:50","slug":"https-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigments-carbon-blackhttps-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigm","status":"publish","type":"post","link":"https:\/\/sailadditive.com\/th\/https-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigments-carbon-blackhttps-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigm\/","title":{"rendered":"Why Modified Polyurethane (Modified PU) Is the Ultimate Dispersant Carrier for Inorganic Pigments and Carbon Black"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30347\" class=\"elementor elementor-30347\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-1f3975e8 e-flex e-con-boxed e-con e-parent\" data-id=\"1f3975e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1918f7b3 color-scheme-inherit text-left elementor-widget elementor-widget-text-editor\" data-id=\"1918f7b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p class=\"wp-block-wd-paragraph wd-56423e3b\">Formulating high-performance coatings requires precise pigment wetting and stabilization. High-surface carbon black and dense inorganic pigments (such as titanium dioxide and calcium carbonate) present extreme challenges for paint engineers. Without effective stabilization, carbon black flocculates quickly, causing haze, loss of jetness, and viscosity spikes. Meanwhile, heavy inorganic pigments tend to settle at the bottom of paint cans, forming tough, un-redispersible hard cakes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-02144265\">Chemical structure determines how effectively a dispersant anchors to pigment surfaces. Among various additive chemistry classes, modified polyurethane polymers stand out as the most versatile carrier matrix for both inorganic fillers and difficult organic pigments.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-69f3d9e5\">To solve these tough stabilization challenges, <a href=\"https:\/\/sailadditive.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">SailAdditive<\/a> developed <strong>S-4010 Dispersing Agent<\/strong>, a 100% active content, high-performance modified polyurethane polymer designed for solvent-based, water-based, and UV coating systems.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-213c90a1\">In this technical article, we analyze why modified polyurethane chemistry provides superior dispersion performance, how it stabilizes titanium dioxide and carbon black, and why S-4010 serves as an essential tool for modern paint formulators.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-39c27598\">The Chemical Advantage of Modified Polyurethane Polymeric Structures<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e6b96895\">Traditional low-molecular-weight wetting agents often fail to stabilize fine pigment particles over long storage periods. They lack sufficient steric hindrance, allowing particles to re-agglomerate under thermal movement.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b0545f0e\">In contrast, modified polyurethane polymers combine two distinct chemical domains into a single molecular backbone:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Densely Spaced Anchoring Groups:<\/strong> The polyurethane chain features multiple basic amine and polar functional groups. These anchor sites form strong hydrogen and ionic bonds with acidic or neutral pigment surfaces.<\/li>\n\n\n\n<li><strong>Solvent-Soluble Polymeric Tail Segments:<\/strong> Flexible polyurethane loops and tails extend outward into the liquid resin matrix. They create a dense, three-dimensional barrier\u2014a mechanism called <strong>steric stabilization<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-baaab7e4\">Consequently, this steric barrier prevents pigment particles from colliding or flocculating, maintaining a smooth, stable dispersion throughout the shelf life of the paint.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1fbbd77e\">Market Landscape: S-4010 vs. Leading Market Competitors<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fdb14036\">Evaluating established market additives helps formulators benchmark polyurethane efficacy and formulation fit across global chemical suppliers.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9f53e122\">The industrial coatings market features several prominent polyurethane dispersants:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BASF produces <a href=\"https:\/\/www.basf.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">EFKA 4010<\/a>, a widely recognized modified polyurethane dispersant used in high-performance automotive and industrial coatings.<\/li>\n\n\n\n<li>BYK manufactures <a href=\"https:\/\/www.byk.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">BYK-161<\/a>, a high-molecular wetting and dispersing additive engineered to deflocculate organic pigments and carbon black in solvent-borne systems.<\/li>\n\n\n\n<li>Evonik supplies <a href=\"https:\/\/www.evonik.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">TEGO Dispers 655<\/a>, which excels at viscosity reduction in demanding high-solids solvent-borne formulations.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2b6f7004\">While these legacy brands deliver high technical performance, <strong>S-4010 Dispersing Agent<\/strong> offers a 100% active polyurethane structure with broad system compatibility, providing exceptional formulation flexibility and lower raw material costs.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-010294c3\">Technical Property Comparison<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Specification \/ Property<\/strong><\/td><td><strong>S-4010 Dispersing Agent PDF<\/strong><\/td><td><strong>EFKA 4010 (Benchmark) PDF<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Chemical Foundation<\/strong><\/td><td>Modified Polyurethane Polymer<sup><\/sup><\/td><td>Modified Polyurethane Polymer<sup><\/sup><\/td><\/tr><tr><td><strong>Active Non-Volatile Content<\/strong><\/td><td>100% (120\u00b0C \/ 2h)<sup><\/sup><\/td><td>~50% (Solvent Cut)<\/td><\/tr><tr><td><strong>Viscosity Range (25\u00b0C, )<\/strong><\/td><td>1000 \u2013 2000<sup><\/sup><\/td><td>300 \u2013 700<\/td><\/tr><tr><td><strong>Exterior<\/strong><\/td><td>Yellow Transparent Liquid<sup><\/sup><\/td><td>Clear Yellow Liquid<\/td><\/tr><tr><td><strong>Target Pigments<\/strong><\/td><td>Titanium Dioxide, Organics<\/td><td>Inorganic &amp; Organic Pigments<\/td><\/tr><tr><td><strong>Compatible Systems<\/strong><\/td><td>Solvent-based, Water-based, UV, Inks<sup><\/sup><\/td><td>Solvent-Borne Industrial Systems<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-9015c7e7\">Stabilizing Inorganic Fillers and Titanium Dioxide <\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-65798fb0\">Inorganic pigments like titanium dioxide and calcium carbonate  possess high specific gravity and polar surface chemistry.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>[Inorganic Pigment Particles] \u2794 [Polyurethane Anchoring Attachment] \u2794 [Steric Barrier Layer] \u2794 [Zero Hard Settling]\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c52bea8e\">Modified polyurethane additives solve two critical challenges associated with inorganic pigments:<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-870f0197\">1. Superior Viscosity Reduction<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-75c7f296\">When formulators charge dry titanium dioxide into a resin matrix, high surface area rapidly absorbs free resin, causing a sharp viscosity rise. S-4010 Dispersing Agent wets inorganic surfaces quickly, releasing trapped resin back into the liquid phase. This dramatic viscosity drop allows manufacturers to increase pigment concentration in the millbase, shorten bead milling time, and reduce energy consumption.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-ed561a57\">2. Robust Anti-Settling Properties<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-84d44fc3\">Dense inorganic fillers tend to sink to the bottom of storage containers over time, forming hard sediments that operators cannot easily stir back up. S-4010 features robust anti-settling properties that keep heavy pigments evenly suspended across long storage periods.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ecc0d052\">Unlocking Deep Jetness and High Gloss in Carbon Black Formulations<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-96bd4604\">Carbon black pigments feature extremely high (surface area) and low oil absorption characteristics. Without specialized polymer stabilization, carbon black particles re-agglomerate after grinding, causing dull brownish tones, severe haze, and viscosity spikes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ac704e7f\">Modified polyurethane chemistry excels at carbon black stabilization for three reasons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Multivalent Anchoring Attachment:<\/strong> Carbon black surfaces contain sparse oxygen-containing functional groups. The multiple amine anchor sites on <strong>S-4010 Dispersing Agent<\/strong> attach firmly across the particle surface, preventing polymer desorption under high shear forces.<\/li>\n\n\n\n<li><strong>Maximum Jetness and Color Depth:<\/strong> Complete deflocculation reduces particle size down to primary aggregates. This complete particle separation maximizes light absorption, producing intense, deep black tones (high jetness).<\/li>\n\n\n\n<li><strong>Elimination of Surface Fogging and Haze:<\/strong> S-4010 prevents fine carbon black particles from floating to the film surface during drying, yielding high-brilliance, crystal-clear high-gloss finishes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-3e164f46\">Film Defect Prevention: Eliminating Floating, Flooding, and Mottling<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8ca524e7\">In mixed pigment systems (for example, white titanium dioxide blended with carbon black or phthalocyanine blue), differing particle sizes and densities cause unequal mobility.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9baba580\">During paint film drying, solvent evaporation creates convection currents (B\u00e9nard cells). Unstabilized pigments separate, resulting in color floating, streaks, or surface mottling.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a8e2eb1b\">S-4010 Dispersing Agent locks diverse organic pigments and inorganic fillers into a cohesive, non-separating matrix. Consequently, it effectively prevents floating, flooding, and mottling in demanding applications like floor coatings, coil coatings, and automotive topcoats.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c395a949\">Furthermore, in low-gloss coatings, S-4010 optimizes the spatial distribution of silica matting powders, producing smooth, uniform matte finishes.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d4a6a735\">Recommended Dosage and Incorporation Sequence<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-671eaea3\">Achieving peak dispersion efficiency requires applying the correct addition levels and following proper laboratory incorporation procedures.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3787845a\">SailAdditive recommends the following practical dosage guidelines based on total formula weight or pigment mass:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Standard Industrial Coating Formulations:<\/strong> 0.1% to 5.0% of total formulation weight.<\/li>\n\n\n\n<li><strong>UV-Curable &amp; Water-Based Formulations:<\/strong> 0.3% to 1.0% of total formulation weight.<\/li>\n\n\n\n<li><strong>Titanium Dioxide  &amp; Inorganic Fillers:<\/strong> 1.0% to 3.0% calculated on dry pigment weight.<\/li>\n\n\n\n<li><strong>Carbon Black &amp; High-Surface Organic Pigments:<\/strong> 10% to 30% calculated on dry pigment weight.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f0d21275\">Correct Incorporation Method<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1fec305c\">Always incorporate <strong>S-4010 Dispersing Agent<\/strong> during the paint mixing stage <em>before<\/em> introducing dry pigment powders. Stir the liquid resin and solvent mixture thoroughly to dissolve S-4010 evenly throughout the liquid phase. This pre-mixing sequence guarantees optimal additive distribution before high-shear bead milling begins.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a4b4e486\">Versatile Industrial Application Fields<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7b7e1ba6\">Because S-4010 functions as a highly versatile, universal dispersant, technical teams can deploy it across diverse coating sectors:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Automotive Coatings:<\/strong> Achieves deep color depth, high brilliance, and zero haze in OEM and refinish topcoats.<\/li>\n\n\n\n<li><strong>Coil Coatings:<\/strong> Withstands high-temperature baking cycles while maintaining film flexibility and gloss stability.<\/li>\n\n\n\n<li><strong>Floor &amp; Epoxy Coatings:<\/strong> Prevents heavy filler settling and eliminates surface mottling in thick films.<\/li>\n\n\n\n<li><strong>Wood &amp; Plastic Coatings:<\/strong> Improves pigment clarity, color development, and matting agent orientation.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-9a17bee6\">Packaging, Storage, and Safe Handling Specifications<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb9ce858\">SailAdditive supports commercial manufacturing with flexible packaging options and clear storage guidelines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Packaging Options:<\/strong> Supplied in standard 25L drums or 200L plastic\/steel barrels.<\/li>\n\n\n\n<li><strong>Storage Conditions:<\/strong> Store in airtight containers in a cool, dry place. S-4010 maintains a 24-month shelf life under proper storage conditions.<\/li>\n\n\n\n<li><strong>Transportation Safety:<\/strong> Transport S-4010 safely as a non-hazardous chemical product.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-15f29a7e\">Elevate Your Pigment Dispersion Performance with S-4010<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d6e9055c\">Modified polyurethane polymers provide the ultimate structural balance for stabilizing carbon black, organic pigments, and heavy inorganic fillers. By choosing <strong>S-4010 Dispersing Agent<\/strong>, paint manufacturers secure rapid viscosity reduction, maximum color jetness, and complete film defect prevention across solvent, water, and UV systems.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8dcbec8b\">The technical specialists at <a href=\"https:\/\/sailadditive.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">SailAdditive<\/a> stand ready to assist your lab with pigment dispersion trials, dosage calculations, and free laboratory evaluation samples.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9bde8fd8\">Ready to optimize your pigment grinding and eliminate film defects? <strong><a href=\"https:\/\/sailadditive.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contact SailAdditive today to request your free S-4010 evaluation sample<\/a><\/strong> and elevate your coating performance!<\/p>\n\t\t\t\t\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>Specification \/ Property S-4010 Dispersing Agent PDF EFKA 4010 (Benchmark) PDF Chemical Foundation Modified Polyurethane Polymer Modified Polyurethane Polymer Active<\/p>","protected":false},"author":1,"featured_media":30348,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-30347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Modified Polyurethane (Modified PU) Is the Ultimate Dispersant Carrier for Inorganic Pigments and Carbon Black - SAIL-ADDITIVE | Leading Chemical Additives Manufacturer<\/title>\n<meta name=\"description\" content=\"Discover why modified polyurethane polymers provide optimal steric stabilization for titanium dioxide and carbon black. Learn how S-4010 Dispersing Agent optimizes gloss and prevents settling.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sailadditive.com\/th\/https-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigments-carbon-blackhttps-sailadditive-com-blog-why-modified-polyurethane-is-best-carrier-for-inorganic-pigm\/\" \/>\n<meta property=\"og:locale\" content=\"th_TH\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why Modified Polyurethane (Modified PU) Is the Ultimate Dispersant Carrier for Inorganic Pigments and Carbon Black - SAIL-ADDITIVE | Leading Chemical Additives Manufacturer\" \/>\n<meta property=\"og:description\" content=\"Discover why modified polyurethane polymers provide optimal steric stabilization for titanium dioxide and carbon black. 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