{"id":46207,"date":"2026-09-04T18:02:37","date_gmt":"2026-09-04T18:02:37","guid":{"rendered":"https:\/\/www.test.flokserkimya.com.tr\/how-does-correct-raw-material-selection-affect-product-performance-in-polyurethane-systems\/"},"modified":"2026-10-15T17:51:11","modified_gmt":"2026-10-15T17:51:11","slug":"how-does-correct-raw-material-selection-affect-product-performance-in-polyurethane-systems","status":"publish","type":"post","link":"https:\/\/www.flokserkimya.com.tr\/en\/how-does-correct-raw-material-selection-affect-product-performance-in-polyurethane-systems\/","title":{"rendered":"How Does Correct Raw Material Selection Affect Product Performance in Polyurethane Systems?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The performance of a polyurethane product does not only depend on the production process or the tests applied to the final product. The real difference often begins with the selection of raw materials. <\/p>\n\n<p class=\"wp-block-paragraph\">Correct raw material selection in polyurethane systems directly affects many properties, from the product&#8217;s hardness and flexibility to its tensile strength, water and chemical resistance, viscosity, and curing time.<\/p>\n\n<p class=\"wp-block-paragraph\">Every component, from the structure of the polyol to the choice of isocyanate, the NCO\/OH ratio to the catalyst, and the chain extender to the filler, can alter the behavior of the final product.<\/p>\n\n<p class=\"wp-block-paragraph\">Correct raw material selection can mean better mechanical properties, a more controlled process, more stable production, and a final product better suited to application conditions.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Why Are Raw Materials So Important in Polyurethane Systems?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Polyurethane systems are generally built upon two main components:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>Polyol<\/strong><strong> component<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>Isocyanate<\/strong><strong> component<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">However, an industrial polyurethane system can contain much more than that.<\/p>\n\n<p class=\"wp-block-paragraph\">Depending on the formulation, many different raw materials and additives can be used, such as:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Chain extenders,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Crosslinkers,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Catalysts,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Silicone surfactants,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Fillers,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Plasticizers,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Flame retardants,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Pigments,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Stabilizers,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Moisture scavengers<\/p>\n\n<p class=\"wp-block-paragraph\">can be utilized.<\/p>\n\n<p class=\"wp-block-paragraph\">Each of these raw materials affects a specific property of the system.<\/p>\n\n<p class=\"wp-block-paragraph\">Changing a raw material in the formulation can alter not only the hardness but also the viscosity, reaction rate, elasticity, adhesion, or water resistance.<\/p>\n\n<p class=\"wp-block-paragraph\">How Does <strong>Polyol<\/strong><strong> Selection Affect Product Performance?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Polyol is one of the fundamental building blocks of a polyurethane system.<\/p>\n\n<p class=\"wp-block-paragraph\">However, &#8220;polyol&#8221; does not refer to a single raw material. There are numerous types of polyols with different chemical structures, molecular weights, and functionalities. <\/p>\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Polyether polyols,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Polyester polyols,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Polycarbonate polyols,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Acrylic polyols<\/p>\n\n<p class=\"wp-block-paragraph\">can be used in the development of polyurethane systems with different properties.<\/p>\n\n<p class=\"wp-block-paragraph\">The choice of polyol can affect properties of the final product such as flexibility, hardness, hydrolysis resistance, mechanical properties, chemical resistance, and low-temperature performance.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Why Is Molecular Weight Important?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">As the molecular weight of the polyol increases, significant changes can occur in the flexibility and softness of the system.<\/p>\n\n<p class=\"wp-block-paragraph\">Lower molecular weight polyols may be preferred in the development of systems that provide higher hardness and crosslink density.<\/p>\n\n<p class=\"wp-block-paragraph\">However, looking at molecular weight alone is not sufficient here.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Functionality is at least as important as molecular weight.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">As functionality increases, the amount of crosslinking that can occur in the system may increase. As a result, a harder structure can be obtained. <\/p>\n\n<p class=\"wp-block-paragraph\">Why Is <strong>Isocyanate<\/strong><strong> Selection Important?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The other fundamental component of polyurethane systems is isocyanate.<\/p>\n\n<p class=\"wp-block-paragraph\">Isocyanate selection has a significant impact on the product&#8217;s mechanical properties, curing behavior, chemical resistance, color stability, and application performance.<\/p>\n\n<p class=\"wp-block-paragraph\">Different types of isocyanates can be used depending on the system.<\/p>\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 MDI,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 TDI,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 pMDI,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Aliphatic isocyanates<\/p>\n\n<p class=\"wp-block-paragraph\">may be preferred in different applications.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>The Difference Between <\/strong><strong>Aromatic and Aliphatic <\/strong><strong>Isocyanate<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Aromatic isocyanates are widely used in many industrial polyurethane systems due to their high mechanical performance and cost advantages.<\/p>\n\n<p class=\"wp-block-paragraph\">However, in applications where UV resistance and color stability are important, <strong>aliphatic <\/strong><strong>isocyanates<\/strong> may stand out.<\/p>\n\n<p class=\"wp-block-paragraph\">For instance, the same isocyanate selection may not be ideal for a coating system to be used outdoors where minimal color change is desired over a long period, compared to an elastomer to be used indoors.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How Does the NCO\/OH Ratio Change the Product?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">One of the most important parameters in polyurethane formulations is the <strong>NCO\/OH ratio.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">To put it simply, it is an important design parameter that determines the ratio at which the NCO groups on the isocyanate side and the OH groups on the polyol side will react with each other.<\/p>\n\n<p class=\"wp-block-paragraph\">A change in this ratio can be effective on:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Workability.<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Flexibility,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Crosslinking,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Mechanical strength,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Reaction behavior,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Curing properties.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, a system with a higher NCO level may show a tendency toward higher crosslinking or hardness under appropriate formulation conditions.<\/p>\n\n<p class=\"wp-block-paragraph\">However, an approach such as &#8220;the higher the NCO, the better the product&#8221; is not correct.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>The elasticity, adhesion, water resistance, and usage conditions of the target product must be evaluated together.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The Role of Chain Extenders and Crosslinkers<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Especially in polyurethane elastomer systems, chain extenders and crosslinkers can significantly change product performance.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">While chain extenders play an important role in the structure of polymer chains, crosslinkers can contribute to the formation of a more three-dimensional and durable structure.<\/p>\n\n<p class=\"wp-block-paragraph\">With the right choice, properties such as:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Elasticity,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Workability.<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Tear strength,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Shore hardness,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Abrasion resistance,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Abrasion resistance<\/p>\n\n<p class=\"wp-block-paragraph\">can be controlled.<\/p>\n\n<p class=\"wp-block-paragraph\">However, an excessive amount or an incorrectly selected chain extender\/crosslinker can cause the system to harden more than necessary and reduce elasticity.<\/p>\n\n<p class=\"wp-block-paragraph\">The goal here is not to create as much crosslinking as possible, but to create the optimum structure suitable for the application.<\/p>\n\n<p class=\"wp-block-paragraph\">How Does <strong>Catalyst Selection Affect <\/strong><strong>Curing<\/strong><strong> Time?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Catalysts are used in <\/strong><strong>polyurethane systems<\/strong><strong> to control the reaction rate.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Especially in two-component systems, how quickly the process of:<\/p>\n\n<p class=\"wp-block-paragraph\">Mix \u2192 Apply \u2192 Cure<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>occurs can be critical for <\/strong><strong>the application.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Catalyst selection can affect properties such as:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Cream time,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Gel time,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Curing time,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Workability time,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Surface appearance.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, a system that reacts too quickly may not provide sufficient leveling or surface wetting during application.<\/p>\n\n<p class=\"wp-block-paragraph\">In a system that reacts too slowly, production efficiency may decrease.<\/p>\n\n<p class=\"wp-block-paragraph\">Therefore, the goal in catalyst selection is not just the &#8220;fastest reaction.&#8221; The goal is a controlled reaction rate suitable for the application.<\/p>\n\n<p class=\"wp-block-paragraph\">How Do Fillers and Additives Affect the Product?<\/p>\n\n<p class=\"wp-block-paragraph\">Various fillers and additives can be used in polyurethane systems for cost optimization, <strong>improving mechanical properties,<\/strong> changing density, or imparting <strong>specific characteristics.<\/strong> <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>However, the use of fillers does not always provide only a cost advantage.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Filler type and amount can be effective on:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Viscosity,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Density,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Hardness,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Sedimentation,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Workability.<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Tear strength,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Shore hardness,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Elastic recovery may come to the fore.<\/p>\n\n<p class=\"wp-block-paragraph\">Especially in systems containing high levels of filler, mixture homogeneity and process control become more critical.<\/p>\n\n<p class=\"wp-block-paragraph\">How Does Raw Material Selection Affect Viscosity?<\/p>\n\n<p class=\"wp-block-paragraph\">The viscosity of a polyurethane system is a critical parameter, especially in applications involving casting, injection, spraying, or automatic dosing.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Very high viscosity can lead to:<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Pumping problems,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Mixing difficulties,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Surface wetting problems,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Increased equipment load.<\/p>\n\n<p class=\"wp-block-paragraph\">Very low viscosity, on the other hand, can make it difficult to control the application or achieve the target film\/coating thickness.<\/p>\n\n<p class=\"wp-block-paragraph\">Does Raw Material Selection Affect Water Resistance?<\/p>\n\n<p class=\"wp-block-paragraph\">Water resistance is an important performance criterion for polyurethane systems operating especially outdoors, in waterproofing, floor coatings, or humid environments.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>The chemical structure of the polyol, isocyanate selection, crosslink structure, and the additives used can affect the water and moisture behavior of the final product.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">In particular, the water and hydrolysis behaviors of polyester and polyether-based systems can differ from each other.<\/p>\n\n<p class=\"wp-block-paragraph\">How Does Correct Raw Material Selection Determine Mechanical Properties?<\/p>\n\n<p class=\"wp-block-paragraph\">The mechanical performance of a polyurethane product is the result of many variables.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Depending on the target application, properties such as:<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Tensile strength,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Elongation,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Tear strength,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Shore hardness,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Abrasion resistance,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Impact resistance,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Elastic recovery may come to the fore.<\/p>\n\n<p class=\"wp-block-paragraph\">The Relationship Between Raw Material Quality and Product Performance<\/p>\n\n<p class=\"wp-block-paragraph\">Even two different raw materials in the same chemical class may not yield the same result in the product.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>For example, two different polyols may have different:<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Molecular weights,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Functionalities,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Molecular weight,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Viscosities,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Water contents,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Purities.<\/p>\n\n<p class=\"wp-block-paragraph\">Similarly, the NCO content, viscosity, and reactivity of two different isocyanates can differ.<\/p>\n\n<p class=\"wp-block-paragraph\">Therefore, the product name or chemical class alone is not sufficient for raw material selection.<\/p>\n\n<p class=\"wp-block-paragraph\">Why Might Reformulation Be Necessary When Changing Raw Materials?<\/p>\n\n<p class=\"wp-block-paragraph\">In production, it may be desired to replace one raw material with another from time to time for reasons of cost, supply problems, or to create alternative sources.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>However, there is no guarantee that <\/strong><strong>two &#8220;chemically similar&#8221; products<\/strong><strong> will provide exactly the same performance.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">For example, when a polyol is changed, its:<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 OH value,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Viscosity,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Molecular weight,<\/p>\n\n<p class=\"wp-block-paragraph\">\u2022 Functionality may change.<\/p>\n\n<p class=\"wp-block-paragraph\">This can cause the same recipe ratios to no longer provide the same NCO\/OH balance or cause the reaction behavior to change.<\/p>\n\n<p class=\"wp-block-paragraph\">Frequently Asked Questions<\/p>\n\n<p class=\"wp-block-paragraph\">What is the most important raw material in polyurethane systems?<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Frequently Asked Questions<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Does polyol selection affect the properties of the polyurethane product?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Yes. The chemical structure, molecular weight, OH value, and functionality of the polyol can affect properties such as the product&#8217;s hardness, flexibility, mechanical strength, and water\/hydrolysis behavior.  <\/p>\n\n<p class=\"wp-block-paragraph\">Why is <strong>isocyanate<\/strong><strong> selection important?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The type of isocyanate can affect properties such as mechanical performance, reaction behavior, hardness, durability, and especially color and UV stability in outdoor applications. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>What should be considered when choosing <\/strong><strong>an equivalent polyurethane raw material?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Not only the product name or chemical class should be compared. OH value, NCO content, functionality, molecular weight, viscosity, water content, and other technical parameters should be compared; then laboratory and performance tests should be conducted.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Does a more expensive raw material always mean a better product?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">No. There is no direct relationship between raw material price and product performance. What matters is that the raw material is suitable for the target application and formulation. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Why is the NCO\/OH ratio important in polyurethane formulation?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The NCO\/OH ratio is one of the fundamental parameters affecting the balance of reactive groups in the system and thus the resulting polymer structure. This ratio can be effective on the product&#8217;s hardness, elasticity, crosslinking, and mechanical properties.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>correct_<\/strong><strong>raw_material_in_polyurethane_<\/strong><strong>systems_1<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The NCO\/OH ratio is one of the fundamental parameters affecting the balance of reactive groups in the system and, consequently, the resulting polymer structure. This ratio can influence the product&#8217;s hardness, elasticity, cross-linking, and mechanical properties. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The performance of a polyurethane product does not only depend on the production process or the tests applied to the final product. The real difference often begins with the selection of raw materials. Correct raw material selection in polyurethane systems directly affects many properties, from the product&#8217;s hardness and flexibility to its tensile strength, water&hellip;<\/p>\n","protected":false},"author":1,"featured_media":46208,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[206],"tags":[],"class_list":["post-46207","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-3","category-206","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Does Correct Raw Material Selection Affect Product Performance in Polyurethane Systems? - Flokser Kimya<\/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.flokserkimya.com.tr\/en\/how-does-correct-raw-material-selection-affect-product-performance-in-polyurethane-systems\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Does Correct Raw Material Selection Affect Product Performance in Polyurethane Systems? - Flokser Kimya\" \/>\n<meta property=\"og:description\" content=\"The performance of a polyurethane product does not only depend on the production process or the tests applied to the final product. 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