Characteristics of Acrylic Polyurethane Topcoat Acrylic polyurethane paint, formed by the reaction of hydroxyl-containing acrylic ester and aliphatic polyisocyanate such as HDI trimer, has a paint film with excellent hardness and flexibility, and good chemical resistance. Its outstanding weather resistance, high gloss, good drying properties, and fast surface drying without dust adhesion make it the preferred topcoat in heavy-duty anti-corrosion coating systems. Due to its high hardness and excellent surface gloss, it is also used as polyurethane enamel and acrylic polyurethane enamel. Among polyurethane coatings and even all types of coatings, two-component solvent-based polyurethane coatings have excellent performance and therefore account for a large proportion. Among them, two-component acrylic polyurethane coatings are a new type of coating developed in recent years. Because their macromolecular structure contains both urethane chain segments and acrylic carbon-carbon long chain segments, they combine the advantages of both types of coatings. Durability: Acrylic polyurethane topcoats have very good durability, especially in terms0 of yellowing resistance. In a dry environment, they can withstand temperatures up to 120°C, but some aging and yellowing may occur. If long-term color retention is required, the maximum operating temperature for equipment and pipelines is recommended not to exceed 80°C. Applying too thick a coat can lead to blistering or poor film formation, affecting its performance. Chemical Resistance: Acrylic polyurethane topcoats have good resistance to chemicals, crude oil, gasoline, and general solvents, but their chemical resistance is not as good as polyester polyurethane topcoats. Paint Film Hardness: The hardness of acrylic polyurethane topcoats is not as good as epoxy topcoats, so epoxy topcoats can be used in areas such as ship decks or walkways. In the early stages of curing, acrylic topcoats are quite flexible and thermoplastic. Therefore, adhesion testing on newly applied topcoats may show relatively poor results. Adhesion will improve over the following weeks. This is mainly due to the product being applied at low temperatures or applied too thickly, or it could also be due to the primer being applied too thickly, allowing solvents to remain and react with isocyanates, such as certain epoxy primers containing butanol solvents Temperature resistance: Acrylic polyurethane paint loses its gloss quickly in high humidity and high-temperature environments. Low temperature and high humidity environments, as well as condensation or rainwater on the surface immediately after application, can lead to discoloration, loss of gloss, and blistering of the paint film.

Environmental Friendliness: Water-based acrylic resins use water as a solvent and do not produce harmful gases or pollutants during use, meeting environmental protection requirements. Weather Resistance: They have good weather resistance and can be used under various climatic conditions, being less susceptible to the effects of ultraviolet light, oxygen, and humidity. Good Adhesion: They exhibit good adhesion and can bond to a variety of substrates (such as metals, glass, ceramics, fibers, etc.). Fast Drying: After dissolving in water, water-based acrylic resins can quickly form a hard, wear-resistant film through heating or air drying. Good Adjustability: They have good adjustability and can be diluted, colored, and filled as needed to obtain the desired properties. Molecular Structure Design: Molecular structure design is the core of water-based acrylic resin design. By selecting appropriate acrylate monomers, the resin's performance can be adjusted. Monomer Composition: Common hydroxyl-containing functional monomers such as hydroxyethyl acrylate and hydroxyethyl methacrylate can form hydrogen bonds with water, improving the hydrophilicity of the resin. Carboxyl Monomers: Such as methacrylic acid and acrylic acid, can undergo ring-opening addition reactions with epoxy groups, or form amide bonds with amino resins under acidic or alkaline conditions. Amide Monomers: Amide monomers such as acrylamide enhance intermolecular forces, improving the water solubility, chemical activity, thermal stability, and thermal properties of the polymer. Epoxy Monomers: Epoxy monomers can undergo ring-opening reactions with nucleophiles such as primary amines, thiols, or hydroxyl groups under mild conditions, improving the hardness, gloss, adhesion, UV absorption performance, and thermal stability of the copolymer. Fluorine-containing Acrylic Monomers: The complete monomers can be detected in GCMS and PGC spectra, and special elements can be screened using XRF, while IC can be used for absolute quantification of fluorine-containing acrylic monomers. Bromine-containing Acrylic Monomers: These improve the flame retardant properties of the resin and are often used in interior decoration materials such as curtains and carpets in buildings. Sulfonic acid-based acrylic monomers: improve the hydrophilicity and water absorption properties of copolymers; reduce the friction coefficient and improve lubrication; the sulfonic acid group complexes with Fe3+, increasing the rigidity of the hydrogel; and improve temperature, salt, and shear resistance. Room 1013, Building A5, Financial Port Center, Yangzijiang Road, Baohe District, Hefei City， Anhui province, China +86 0551 63459511 sales@sinogracechem.com vivisinograce@outlook.com +8615755193346 http://www.sinogracechem.com

This seemingly ordinary milky-white liquid contains immense power to transform the world of materials. In daily life, we rarely notice a chemical product called "acrylic emulsion," yet it's ubiquitous—from home wall coverings to clothing fibers, from packaging materials to wood coatings, this magical emulsion is quietly adding color and convenience to our lives. What is Acrylic Emulsion? Acrylic emulsion is a milky-white or nearly transparent viscous liquid made from acrylate monomers through an emulsion polymerization reaction. Simply put, this process is like making salad dressing; an emulsifier stably disperses otherwise difficult-to-mix ingredients in water, forming a homogeneous emulsion system. Acrylic emulsion is one of the main film-forming substances in water-based coatings, accounting for a significant proportion of the raw materials used in water-based coatings. It is non-toxic, non-irritating, and environmentally friendly, while also possessing excellent physical and chemical properties, making it an environmentally friendly chemical raw material. Properties and Classification of Acrylic Emulsions Superior Product Characteristics Acrylic emulsions possess a range of excellent properties: good water resistance, alkali resistance, and stain resistance, and excellent adhesion to a variety of material surfaces. They can be used to formulate matte, semi-gloss, and high-gloss latex paints, and are also suitable for high-quality flooring, cement tiles, and tennis court coatings. When applied to coatings, acrylic emulsions inherit the fast-drying, low-odor, and easy-to-clean characteristics of other water-based coatings. However, compared to other water-based coatings, they offer higher durability and alkali resistance, making them the preferred material for interior wall coatings. Diverse Product Classifications Based on application, acrylic emulsions can be classified as: interior wall emulsions, exterior wall emulsions, stone-like paint emulsions, elastic emulsions, liquid granite paint emulsions, waterproof emulsions, and sealing emulsions. Based on composition, they can be classified as: pure acrylic emulsions, silicone acrylic emulsions, styrene-acrylic emulsions, and vinyl acetate-acrylic emulsions. Different types have their own characteristics to meet diverse application needs. Applications of Acrylic Emulsions Acrylic emulsions have a wide range of applications, permeating almost every aspect of our lives: In the construction industry, acrylic emulsions, with their excellent adhesion, weather resistance, and environmental friendliness, have become the preferred base material for high-performance architectural coatings. They can also be used in waterproofing materials, where their excellent water resistance and weather resistance ensure stable product performance. In textile processing, acrylic emulsions impart more functional properties to textiles, such as acting as finishing agents to improve the abrasion resistance and wrinkle re...

Acrylic resins used in adhesives and acrylic resins used in coatings differ in the following aspects: Performance Characteristics Acrylic Resins for Adhesives High Bonding Strength Requires strong adhesion between different materials, requiring rapid curing and sufficient cohesive and adhesive strength. For example, α-cyanoacrylate adhesives can cure in seconds for rapid bonding. Good Flexibility When the adhered materials are subjected to external forces, the adhesive's flexibility can buffer stress, preventing easy cracking at the bonded area and ensuring the durability of the bond. For example, second-generation acrylic adhesives form a tough cured product through the reaction of monomers and elastomers. Strong Surface Adaptability Exhibits good adhesion to various material surfaces, including metals, plastics, glass, and wood. Surface preparation requirements for the bonded materials are relatively low; some adhesives can even bond to oil-coated surfaces. Acrylic resin for coatings Good weather resistance In outdoor environments, it can resist long-term erosion from ultraviolet rays, rain, wind, sand, and temperature changes. It is not prone to fading, chalking, cracking, or peeling, maintaining the integrity and decorative properties of the coating. It is often used for coating outdoor buildings and facilities. Excellent decorative properties It can be made into coatings with different gloss levels, such as high gloss and matte. It offers a rich variety of colors with good color retention, providing excellent visual effects. It also has excellent leveling properties, forming a smooth and even coating surface. Good mechanical properties It possesses a certain degree of hardness, abrasion resistance, and flexibility to resist mechanical actions such as friction and impact during use, protecting the surface of the coated object. However, different coatings may emphasize different aspects of hardness and flexibility; for example, wood coatings may prioritize flexibility, while metal coatings may focus more on hardness. Chemical Composition and Formulation Acrylic Resins for Adhesives Monomer Selection Commonly used monomers include acrylates and methacrylates. Special functional monomers are also introduced to improve adhesive properties, such as monomers containing polar groups like hydroxyl and carboxyl groups, which can increase interaction with the surfaces of the adhered objects. Additive Use Initiators, accelerators, stabilizers, plasticizers, etc., are added. For example, anaerobic adhesives require a special initiation system to initiate the curing reaction under anaerobic conditions. Acrylic Resins for Coatings Monomer Selection In addition to commonly used acrylate monomers, monomers with specific functions are selected to improve coating performance. For example, fluorinated acrylate monomers can improve the water resistance and stain resistance of coatings. Additive Use Pigments, fillers, dispersants, leveling agents, defoamers, etc....