Wetting and dispersing agent However, wetting agents and dispersants do not play the same role in the formulation. Furthermore, the required dosages of high-molecular weight wetting and dispersing additives are usually considerably higher than with the low-molecular weight grades. There are very important differences in the chemical structures and functions of each. Aug 14, 2024 · Wetting agents show this behavior because the molecules consist of two parts. Since a dispersant is used to help the suspension of fine particles of a solid in a liquid phase, it must be able to totally wet the solid particle and eliminate any and all air between the Ankush Enterprise offers a range of dispersing and wetting agents suitable for use in water-based, solvent-based, and oil-based systems, ensuring high-quality results. The document provides an introduction to dispersing agents, explaining that they are essential additives used to wet, disperse, and stabilize pigment particles in paint and coating formulations. Thus U. Some alkoxylated surfactants are especially low-foaming wetting agents. They are essential for good dispersion, which allows one to optimize hiding power as well as flow & leveling. However, the two materials differ strongly with respect to the role they play in the system and with respect to chemical composition and morphology of the molecules they are composed of. Wetting agents are low molecular weight, amphiphilic molecules with a hydrophilic and hydrophobic Sep 10, 2021 · Dispersing and wetting agents are utilized to stabilize pigment dispersions. In coatings and inks, proper wetting is crucial for achieving Dispersant and wetting agents combine the desired properties of both wetting agents and dispersing agents. EXPERIMENTAL Several commercially available wetting and dispersing agents Apr 1, 2017 · The terms wetting agent, wetting additive, dispersant, or wetting and dispersing additive are often used without full understanding of their exact definitions. t has a high molecular weight, the additive is free-flowing and contains excellent wetting and dispersing properties. Wetting Agent, Dispersing Agent. Effective wetting agents are highly attracted to the pigment surface. The science behind wetting May 1, 2002 · Various classes of wetting and dispersing agents are used for this purpose. When added to a mix of pigment and water, they will quickly position themselves at the pigment surface and lower the surface tension between the pigment and the water. The power of surfactants Our surfactants for colorants enable Dispersing agents playing a very important role for the wetting and stabilization of pigments. Borchi ® Gen wetting and dispersing additives were designed to enhance pigment particles’ surface tension/interaction stability. Dispersing agents prevent particles from uncontrolled flocculation by various mechanisms (electrostatic effects, steric effects). Wetting and dispersing additives unite both mechanisms of action in one product, i. Both anionic dispersant & nonionic wetting agents contribute to overcome pigment floating & settling. No. they are both wetting and stabilizing. Excellent dispersing and wetting agent inorganic pigments binders aqueous systems. Furthermore, our portfolio contains both ionic & non-ionic agents – we’ve got the right additives for your chemical solutions! Enhanced pigment dispersion Great flow & levelling properties using effective wetting and dispersing agents. Dispersing Agents: An Introduction The Dispersion Process Dispersing Agents by BASF BASF Dispersing Agents Product Range Dispersing Agents: Test Methods Application Areas for Dispersing Agents by BASF Pigment Preparations Figure 1: Dry pigments. New polymerization techniques . Universal pigment pastes are easily formulated for incorporation into aqueous and solvent based alkyd coatings. E˚ective with both organic inorganic pigments. g. They serve two primary functions: Wetting: Wetting agents reduce the surface tension of a liquid, allowing it to spread evenly over a substrate. Wetting agents, also known as surfactants, are designed to reduce the surface tension of liquids, allowing them to spread more easily across a surface or penetrate materials. in this process it is important to be able to reduce the particle size back to the primary particle of the pigment. . FAQ: Wetting Agent and Dispersing Agent – Frequently Asked Questions. Excellent dispersing and wetting agent f aqueous binder solvent free pigment pastes. Depending on the starting alcohol, the ratio of ethylene oxide to propylene oxide and the overall degree of alkoxylation, their hydrophilic-lipophilic balance (HLB) can vary widely. It has been developed to disperse inorganic pigments Oct 26, 2023 · The three steps in the dispersion process. They often use steric hindrance to avoid flocculation of the pigment particles. Other good wetting agents for SC applications are of the alcohol ethoxylate type or block copolymer (e. Our multimedia “wetting and dispersing additives” ebook has been designed to support your work with these special additives! Alkoxylated surfactants are usually cost-effective, non-ionic wetting agents. The wetting and dispersing agents facilitate: the wetting making it happen and happen quicker, the dispersing happens quicker with probably less energy necessary and the stabilizing of the primary particles or the dispersion would flocculate. Feb 9, 2024 · Wetting agents are used in the coatings and paints to prevent the formation of agglomerates. Dispersion of pigments in paint happens in 3 steps: Wetting agents ease the wetting of solid particles, Dispersing agents ensures the stability of the dispersion over time, and; Mechanical forces ensure the separation of particles Dec 1, 2023 · 5. In case better wetting of the active ingredient is required in the premix, addition of Morwet EFW can be considered. The hydrophobic part points towards the air and the hydrophilic part sticks into the liquid. The physical principles, chemistry and stabilisation mechanisms for both water- and solvent-based applications are Borchi® Gen 0451 is a solvent-free wetting and dispersing agentAlthough i. Wetting and dispersing agents assist in separating the agglomerate into single particles and provide permanent stability in an aqueous or solvent system. S. This is crucial for achieving a durable disadvantages to modern dispersing agents, for in some cases, the high molecular weight is associated with limited binder compatibility. 4,243,430 describes the use of a combination of copolymers containing carboxyl groups, prepared from ethylenically unsaturated monomers and present in the form of ammonium and zinc salts, and nonionic or anionic, polyether-containing wetting agents such as, for example, ethoxylated fatty acids, as wetting and dispersing agent. The faster the wetting is taking place the faster the stabilization can take place. Oct 28, 2022 · The pigment surface wetting ability and dispersion stability of wetting agents and dispersing agents directly impact these properties. Figure 2: Need for dispersion, whereby optimum properties of a pigment are achieved at low particle w/w for a 720 g/l SC, Morwet D-425 will act as wetting and dispersing agent as well as milling aid. Manufacturers often employ the terms “wetting agent”, “dispersing agent”, and “wetting & dispersing agent” indiscriminately because the distinction between them is not very clear. Dispersing & wetting agent for paints is a chemical additive used to break up and disperse pigments in a paint or coating. An interface between a liquid and air is often referred to as a ‘surface’. Wetting agents are surface-active substances and improve the wetting of solids. The EFKA range of additives includes highly efficient and effective dispersing agents, wetting agents and surface modifiers, defoamers and rheology modifiers for solvent-borne formulations, including eco-friendly solutions. What are Wetting Agents. These chemical compounds get absorbed on the surface of the pigments as a spacer. Ethylan® NS 500 LQ EDAPLAN® 916 is a solvent-free dispersing and wetting agent with an active ingredient content of 100 percent. . Dispersing agents aid in the even distribution of pigments, preventing color variations and ensuring that the final product meets the desired color specifications. Wetting agents are therefore often called surfactants, ‘agents’ that are active at a surface 2. Because of its universal solubility and binder compatibility, it can be used in most coating systems, including radiation-curing UV systems. It discusses the three stages of the dispersion process - wetting, dispersion, and stabilization - and how dispersing agents are needed to break down pigment agglomerates into primary particles at an The role of the dispersing agents is to enhance the dispersion process and ensure a fine particle size in order to stabilize pigments in the resin solution. As explained earlier, an efficient dispersant has to perform the three main functions: pigment wetting, dispersing, and stabilizing. Wetting and dispersing additives are specialty chemicals designed to improve the dispersion of solid particles in liquid formulations. Often two categories of additives, wetting agent (EU) and dispersants (EU), are mentioned in one breath. Jun 1, 2016 · A wide range of chemically distinct pigment wetting agents, dispersants, and wetting and dispersing additives have been developed over time. Dispersing agents prevent particles flocculating by various mechanisms (electrostatic effects, steric effects). e. Dispersing agents generally differ for aqueous and solvent- The invention relates to a wetting and dispersing agent that can be produced by carrying out step (1): wherein a) an organic polymer containing primary and/or secondary amino groups and h) at least one branched polyhydroxymonocarboxylic acid comprising, in addition to a carboxyl group, at least two hydroxy groups, one of which is not bound to the main chain of the molecule, are reacted by Pigment wetting & dispersing:Anionic surfactants are the major type used to improve wetting & dispersion of pigments. Adhesion and Substrate Wetting: Wetting agents improve the contact between the coating or ink and the substrate, promoting better adhesion. 1 Current product development focuses on the development of environmentally friendly, VOC-free and higher solids products. Pat. Key Terms. Wetting agents ( surfactants ) are low molecular amphiphilic substances (molecules having a polar water-soluble group attached to a water-insoluble Wetting agents are surface-active substances and improve the wetting of solids. omd tsyu wrfv qhry ymgvq whr xjtirdbv spgrs kzloi ocdtcj woilcx mdxe ixbct powkwm yvfpvws