Vinyl acetate-ethylene copolymer emulsion

VAE emulsions are environmentally friendly products. Vinyl groups are embedded in the polyvinyl acetate molecular chain, giving the polymer emulsion a low film-forming temperature and excellent film-forming properties. They exhibit strong adhesion to difficult-to-adhere materials such as PET, PVC, PE, and PP. The polymer film produced is very water and weather resistant. It also holds up well to scrubbing and remains flexible even at low temperatures. The thickness of VAE emulsions is impacted by a number of things.    1. Effect of Solids Content on Viscosity We conducted extensive testing on the formulations and process conditions of VAE Emulsion DA-180L and VINNAPAS 400, respectively. The data in the following tables are derived from these tests. The relationship between solids content and viscosity is shown in Table 1. As shown in Table 1, higher solids content increases viscosity. This is because higher solids content increases the number of colloidal particles in the same emulsion mass, reduces the amount of aqueous phase, and increases the total surface area of the particles. This enhances interparticle interactions and resistance to motion, resulting in higher viscosity.   2. Effect of Protective Colloids on Viscosity In emulsion polymerization, protective colloids are often used as emulsion stabilizers to improve emulsifier stability and adjust viscosity. The emulsion stability of partially hydrolyzed PVA is also related to the distribution of acetyl groups on the polymer chain. A higher degree of blockiness in the acetyl group distribution results in greater surface activity, better emulsion stability, and smaller and more viscous emulsions. The higher the PVA degree of polymerization, the higher the viscosity of the polyvinyl alcohol aqueous solution before polymerization, and the higher the viscosity of the VAE. The higher the degree of alcoholysis of PVA, the lower the viscosity of the VAE. PVA's protective colloid ability increases with increasing degree of polymerization. Low-degree PVA forms coarser latex particles and has lower viscosity. An increase in the degree of polymerization improves both the protective and dispersing capabilities. To maintain the dispersion and protective properties of PVA during emulsion polymerization, while only adjusting the viscosity, the total amount of PVA is typically kept constant, with only the ratio between the two adjusted. With other conditions remaining unchanged, adding 4.54 kg of PVA Polyvinyl Alcohol 088-20 will increase the viscosity of each batch by 100 mPa·s. Table 2 lists the molecular weight and molecular weight distribution of high- and low-viscosity VAE emulsions. Table 2 shows that the low-viscosity emulsion has a higher molecular weight, coarser particles, and a wider particle size distribution than the high-viscosity emulsion, resulting in lower viscosity.   3. Effect of Initial Initiator on Viscosity The initiator has a main influence on the speed of polymerization. The more initiator is used, the faster the polymerization reaction is, and the reaction is difficult to control. After the polymerization conditions and the type of initiator are determined, the amount of initiator can be used to adjust the molecular weight of the polymer. The more initiator is used, the smaller the molecular weight of the polymer is, and the viscosity of the emulsion increases, and vice versa. Among them, the amount of initial initiator (ICAT) added has the greatest impact. These data clearly show that the more initial initiator is added, the higher the viscosity of the emulsion. This is because the more initial initiator is added, the more difficult the monomer is to react or the reaction rate is slow in the initial stage, and the resulting polymer has a smaller molecular weight, smaller particle size, and higher viscosity.   4. Conclusions (1) The higher the solid content of the emulsion, the greater the viscosity. (2) The higher the degree of polymerization of the protective colloid PVA, the greater the viscosity of the emulsion, and vice versa. (3) The viscosity of the emulsion when PVA is used as a protective colloid is higher than that when cellulose or surfactant is used as a protective colloid. (4) With the same degree of polymerization, the higher the degree of alcoholysis, the lower the viscosity of the emulsion. (5) The more initial initiator and total amount of initiator added, the higher the viscosity of the emulsion.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

  1.Glue for paper packaging and cardboard: efficient bonding, environmentally friendly and safe VAE adhesives suitable for cardboard packaging, film-sheet lamination, paper tube/honeycomb sponge molding, as well as envelope making and book binding. This product line has some great technical benefits. It offers strong bonding and good heat resistance for different materials, including engineering plastics like PET and PS. Plus, it cures quickly, which can help boost production efficiency. Its formula system combines diversity and safety. It not only meets the regulatory requirements of food contact materials, but also has excellent spraying suitability, ensuring stable and uniform sizing effects during high-speed production, while keeping the equipment clean and reducing maintenance frequency. Recommended products: VINNAPAS EP 706K, EP 707K; VINNAPAS EAF 67, EAF 68     2. Woodworking glue: high strength, low formaldehyde VAE adhesives are really flexible when it comes to wood processing. They are great for things like furniture, wood floors, plywood, and doors and windows.This adhesive has excellent water resistance and heat resistance, fast curing speed, and adopts innovative DPX technology to achieve a hardener-free formula. At the same time, the formaldehyde content is controlled below 5ppm, effectively solving the yellowing problem. Its excellent overall performance is particularly suitable for impregnated paper or PVC veneer. In addition, VAE adhesives can ensure that the surface of the product reaches a very high degree of flatness, and support the addition of medium to high proportions of PUD (polyurethane dispersion), providing professional and efficient bonding solutions for various wood processing needs. Recommended products: EP 706K, EP 707K, VINNAPAS EP 645     3. Textile laminating adhesive: strong and water-resistant, cost-optimized The application of VAE adhesives in the textile industry covers the efficient lamination of cloth and sponge, artificial leather and PVC veneer, providing a variety of product options, covering a wide range of needs from high viscosity to low viscosity, and can provide high solid content formulas. Its excellent water resistance and excellent wet peel strength ensure a strong and lasting bonding effect.Plus, they require less thickening agent, plasticizer, and solvent, which means you can save on costs. Most importantly, VAE has excellent compatibility with materials such as natural latex, acrylic emulsion, polyurethane emulsion and styrene-butadiene latex, making it more cost-effective in various applications. Recommended products: EP 706K, VINNAPAS EP 708, EP 645     4. Tobacco glue: high-speed production, ultra-low residue VAE emulsions are really useful in the tobacco industry, especially for various types of adhesives like cigarette glues (including overlapping, nozzle, and packaging glues) and special adhesives for fast packaging machines. One of their main benefits is that they have very low levels of formaldehyde (less than 15 ppm) and residual vinyl acetate (under 100 ppm), which meets strict health and safety rules. There’s a full range of formulas available, from low to high viscosity, and they offer options with high solid content to suit different production needs. Recommended products: VINNAPAS EP 710, VINNAPAS 756   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

WACKER makes VINNAPAS VAE dispersions, which are polymer binders made from vinyl acetate-ethylene (VAE) copolymers. These binders help make many products work better and be more eco-friendly. WACKER is the top producer of VAE dispersions and redispersible polymer powders. You can find their products in lots of areas like coatings, tile adhesives, exterior thermal insulation systems, self-leveling screeds, interior plasters, paper coatings, and adhesives. What are VAE Copolymer Dispersions? These copolymers are created by mixing vinyl acetate, a hard monomer, with ethylene, a soft monomer, through emulsion polymerization. The ethylene adds flexibility to the VAE dispersions, so they don’t need extra plasticizers.   Great Rheological Properties VINNAPAS dispersions that use polyvinyl alcohol (PVOH) are easy to work with for many adhesive tasks, like paper and packaging (VINNAPAS 706 & VINNAPAS 710) . They’re good for different application methods too, such as roller and spray coating(VINNAPAS EP 705 A).   Reduced Migration The special makeup of the copolymer means that we don't need plasticizers or film-forming agents in products with VAE dispersions. This opens up many options for making low-migration adhesives.   Improved Workability Dispersions made with surfactants usually have better shear-thinning properties compared to those made with polyvinyl alcohol. This leads to better sticking to plastics, clearer films, more water resistance, and easier spraying, which makes it easier to work with floor adhesives. Plus, they can handle more fillers.   APEO Removal When making dispersions for adhesives, we don't need to use surfactants with APEOs (alkylphenol ethoxylates). So, VINNAPAS dispersions meet tougher environmental standards (such as VINNAPAS EP 7000).   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

In the ever-evolving world of textile production, manufacturers are constantly seeking innovative solutions to enhance product quality and efficiency. Vinyl Acetate Ethylene (VAE) emulsion has emerged as a game-changer, replacing traditional binders in various applications. VAE emulsion, also known as Vinyl Acetate Ethylene Copolymer Emulsion, offers a significant advantage over traditional binders by enhancing the quality and durability of textile products. The unique properties of VAE emulsion enable better adhesion, improved flexibility, and superior resistance to environmental factors such as moisture and heat. This results in textiles that maintain their shape, color, and structural integrity throughout their lifecycle. VAE emulsion finds extensive use in the manufacturing of high-quality textile products. Its adhesive properties make it ideal for bonding various materials, including textiles, foams, and non-woven fabrics, without compromising softness or comfort. Whether it's for upholstery, automotive interiors, or apparel manufacturing, VAE emulsion provides excellent bonding strength and ensures impeccable product finish. With increasing demands for faster production cycles, VAE emulsion offers notable advantages in terms of efficiency and cost-effectiveness. Its VAE Re-Dispersible Emulsion form allows for easy application using conventional techniques, such as spray, brush, or roller. This reduces the production time, enhances productivity, and minimizes wastage. Furthermore, VAE emulsion eliminates the need for additional curing processes, reducing energy consumption and overall production costs. In line with the growing focus on sustainability, VAE emulsion demonstrates its environmental responsibility. Being water-based, it offers a greener alternative to solvent-based binders, minimizing the release of volatile organic compounds (VOCs) into the environment. VAE emulsion ( CW 40-707 & DA-500) is also free from hazardous substances, making it safe for both manufacturers and end-users.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com   ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

No, Ethylene Vinyl Acetate (EVA) is not the same as Vinyl Acetate-Ethylene (VAE,DA-310). While both EVA and VAE are copolymers of ethylene and vinyl acetate, they have different structures and properties.   EVA is a copolymer of ethylene and vinyl acetate, where the vinyl acetate content typically ranges from 5% to 50% by weight. It is a flexible, rubbery material commonly used in various applications such as footwear, packaging, and solar cell encapsulation due to its excellent flexibility, low-temperature toughness, and UV resistance. VAE, on the other hand, refers to a different type of copolymer formed by the polymerization of vinyl acetate and ethylene. In VAE, the vinyl acetate content is generally higher than in EVA, typically ranging from 10% to 60% by weight. VAE is often used as a binder or adhesive in construction materials such as paints, coatings, adhesives, and textiles.   So, while both EVA and VAE are copolymers of ethylene and vinyl acetate, they have different compositions and applications.

Proper storage of VAE Emulsion (Vinyl Acetate-Ethylene Copolymer Emulsion) is crucial to maintain its stability and performance over time. Here are some general guidelines for the storage of VAE Copolymer Emulsion:   1.Temperature and Environment: Store VAE emulsion in a cool, dry place. Avoid exposure to extreme temperatures and humidity, as these factors can impact the stability of Vinyl Acetate-Ethylene Copolymer Emulsion. Keep the storage area well-ventilated to prevent the buildup of heat and humidity.   2.Sealed Containers: Store ElephChem VAE emulsion in sealed containers to prevent water evaporation and contamination. Emulsions are water-based, and exposure to air can lead to changes in viscosity and other properties. Ensure that containers are tightly sealed after each use to minimize exposure to air.   3.Protection from Freezing: Protect ElephChem VAE emulsion from freezing. Freezing can lead to irreversible changes in the VAE emulsion's structure and result in a loss of performance. If the VAE emulsion has been exposed to freezing temperatures, it is advisable to thoroughly mix and test it before use.   4.Avoid Exposure to Sunlight: Shield VAE emulsion from direct sunlight. Ultraviolet (UV) radiation can potentially degrade the polymer and affect the performance of the emulsion.   5.Handling Precautions: Follow proper handling procedures to avoid contamination. Use clean equipment and tools when transferring or dispensing Vinyl Acetate-Ethylene Copolymer Emulsion. If possible, use a first-in, first-out (FIFO) system to ensure that older batches are used before newer ones.   6.Avoid Mixing with Incompatible Substances: Do not mix ElephChem VAE emulsion with incompatible substances. This includes avoiding contact with solvents or chemicals that may adversely affect Vinyl Acetate-Ethylene Copolymer Emulsion's stability.   7.Regular Inspection: Periodically inspect stored ElephChem VAE emulsion for any signs of separation, coagulation, or other abnormalities. If any issues are identified, investigate the cause and take corrective action as needed.   8.Manufacturer-ElephChem's Recommendations: Always refer to the specific recommendations provided by the manufacturer for the storage and handling of the particular ElephChem VAE copolymer emulsion you are using. Different formulations may have specific requirements. Following these storage guidelines helps ensure that ElephChem VAE Copolymer Emulsion (such as VAE DA-179)maintains its intended properties and performance throughout its shelf life. Always consult the product's technical data sheet or the manufacturer-ElephChem's guidelines for the most accurate and specific storage recommendations.