Acrylic resins are an indispensable and commonly used resin in water-based coatings. They are widely used in metal coatings, ABS and PC coatings, and glass coatings requiring hardness, especially solid acrylic resins. There are many types of solid acrylic resins. Some solid acrylic resins can be used to produce water-based paints, including the currently popular UV-cured coatings and high-solids coatings. With increasing environmental awareness, water-based coatings are bound to become the mainstream. Advantages of solid acrylic resins: Low storage and transportation costs, good safety. Most solid acrylic resins use methacrylates as the main monomer, and their weather resistance and chemical resistance are superior to acrylic monomers and styrene. They have good potential for promotion in exterior architectural coatings, containers, and automotive refinish paints. Because certain types of solid acrylic resins can be used as water-based UV-cured paints and high-solids coatings, adjusting the monomers can produce low-pollution and low-odor acrylic exterior architectural coatings. Solid acrylic resins contribute to the development of low-pollution coatings in the coating industry. Domestically produced solid acrylic resins are now in mass production, achieving similar performance to imported resins in certain aspects, such as dissolution speed and weather resistance, thus making a new contribution to the promotion of acrylic paints. Organosilicon-modified acrylic resins In addition, organosilicon-modified acrylic resins are also at the forefront of development, as they can be used in the automotive industry for elastic topcoats and interior and exterior wall paints. Organosilicon-modified acrylic coatings are high-performance coatings created by introducing organosilicon polymers into the acrylate structure through a reaction. Silyl chloride-acrylic resin coatings have good performance and excellent adhesion to non-ferrous metals and various plastics. Therefore, its applications are constantly being developed. To meet the latest requirements, users urgently need to develop single-component resin products with good coating application properties and the same performance as two-component products. Sinograce Chemicalhas served water-based coating customers for over 15 years, possessing experience in producing corresponding acrylic resin products to meet the needs of different substrates. For more product information and technical guidance, please contact us.

Sometimes, a slight ammonia smell is detected in water-based acrylic emulsions, which confuses many people: is this normal or is there a problem? First, we need to clarify that acrylic emulsions themselves do not produce an ammonia smell. However, during their production, ammonia-containing additives may be added to adjust their performance or improve their stability. These additives gradually volatilize during use, producing a slight ammonia smell. Therefore, under normal use, a slight ammonia smell in acrylic emulsions is normal. Waterborne acrylic resins are used in emulsion form in textile finishing agents, adhesives, varnishes and other related products. Follow us to learn more about chemical engineering.

I. Why Must Cigarette Packaging Printing Shift to Water-Based Acrylic Emulsions? Traditional solvent-based inks contain large amounts of volatile organic compounds (VOCs) such as benzene and ketones, which not only harm the health of operators but also easily leave residues on packaging, affecting tobacco safety. Water-based acrylic emulsions, using water as the dispersion medium, have extremely low or even zero VOC content, are non-toxic, odorless, and non-flammable, meeting industry standards such as the "VOC Limits in Tobacco Products and Materials," making them the preferred material for current green printing certification. Furthermore, modern cigarette packaging pursues high gloss, metallic feel, and vibrant colors. Through molecular structure design, water-based acrylic emulsions can achieve printing performance comparable to or even superior to solvent-based inks. II. Key Performance Requirements and Technical Adaptation Cigarette packaging printing mostly employs gravure or flexographic high-speed overprinting processes, placing stringent requirements on the ink's workability, stability, and film-forming properties. Water-based acrylic emulsions must meet the following core indicators: Excellent color development and high gloss The emulsion must possess good pigment wetting and dispersion capabilities to ensure color saturation and accurate reproduction. Some specialized emulsions can achieve a gloss level of over 80 at a 60° angle, giving cigarette packs a luxurious feel. Rapid drying and good leveling properties Under medium-to-high speed printing conditions (80–150 m/min), rapid moisture evaporation and uniform film formation are required to avoid defects such as bubbling and orange peel. Controlling the emulsion particle size to 0.1–0.2 μm helps improve drying speed and film density. Strong adhesion and abrasion resistance Finished cigarette packs undergo processes such as folding, creasing, and stacking. The ink must possess excellent adhesion and abrasion resistance to prevent ink splattering or delamination. Styrene-acrylic polymer emulsions excel in this regard. Good Compatibility with Ethanol Systems In actual printing, ethanol is often added to adjust drying speed and viscosity. The emulsion must have excellent alcohol solubility to avoid demulsification or flocculation. Some products can be diluted with ethanol in any proportion and have good reconstitution properties. Environmental Compliance and Safety Free of APEO, heavy metals, and carcinogenic aromatic amines, meeting food-grade packaging safety requirements, suitable for high-hygiene-standard fields such as tobacco, alcohol, and pharmaceuticals. III. Quality Control and Storage Management Testing Items: Each batch should be tested for key parameters such as solid content (48±1%), viscosity (800–2000 cps), pH value (7–9), and particle diameter (0.1–0.2μm). Storage Conditions: Sealed and protected from light, avoid freezing and high temperatures. Recommended storage temper...

Emulsion polymerization, developed in the last century, has seen its production volume, quality, and variety of products increase year by year due to its unique advantages, with increasingly rational production processes. Furthermore, emulsion polymerization technology is constantly innovating. Besides conventional emulsion polymerization, various polymerization technologies have emerged, such as multicomponent emulsion polymerization, seed emulsion polymerization, microemulsion polymerization, fine emulsion polymerization, and non-aqueous emulsion polymerization. These new methods have greatly enriched the content of emulsion polymerization and also raised new questions for theoretical research. Multicomponent emulsion polymerization, through multi-component copolymerization, can increase the possible products and improve the performance of polymers by changing the monomers. We can utilize the synergistic and complementary properties of different monomers or polymer segments to prepare polymers with desired properties. Seed Emulsion Polymerization Seed emulsion polymerization technology is another important method for preparing functional emulsions. In the past one or two decades, the development and application of new emulsion polymerization processes and technologies have been very active. Extensive research has been conducted on the reaction kinetics and mathematical models of emulsion polymerization, achieving considerable and fruitful progress. Microemulsion Polymerization The concept of microemulsions was first proposed by Hoar and Schulman in 1943. Unlike traditional W/O and O/W, microemulsions can also adopt many other textured structures, such as spherical, columnar, and layered structures. A crucial property of microemulsions is that they are isotropic and thermodynamically stable systems; as long as the composition and temperature remain constant, the system will not aggregate. Fine Emulsion Polymerization Fine emulsion polymerization refers to emulsions with monomer droplets only 100–400 nm in size (submicron). Its main components are water, emulsifiers, and water-insoluble long-chain aliphatic hydrocarbons (alcohols) as co-emulsifiers. Because the monomer droplets are dispersed at the submicron level, their surface area is large, making it easier to capture free radicals. Therefore, the main reaction site is the submicron-sized monomer droplet dispersion phase. The presence of long-chain aliphatic hydrocarbons creates a robust interfacial layer between the dispersed phase and submicron-sized monomer droplets, formed by the emulsifier and the long-chain aliphatic hydrocarbon (alcohol). This layer prevents collisions and aggregation of monomer droplets and particles. Simultaneously, the water insolubility of the long-chain aliphatic hydrocarbon (alcohol) also inhibits the interdiffusion of monomers between droplets. Such emulsions are easily predictable and controllable. Non-aqueous emulsions: Non-aqueous emulsions are emulsions obtai...