Rovene 7008

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

In the construction industry, VAE emulsion (Vinyl Acetate Ethylene Copolymer Emulsion) has gained increasing recognition for its versatile applications. By understanding the unique properties and benefits of VAE emulsion, builders can make informed decisions when selecting the most suitable lotion for their specific needs.   VAE emulsion (DA-511 & Airflex 707k) offers numerous advantages when used in coatings and paints. Its exceptional adhesive properties ensure excellent bonding to various substrates, resulting in a durable and long-lasting finish. The versatility of VAE emulsion allows it to be used in both interior and exterior applications, making it highly suitable for a wide range of building projects. Furthermore, its water resistance properties enable coatings and paints to withstand harsh environmental conditions, maintaining their integrity over time.   One of the significant applications of VAE emulsion lies in cement and mortar formulations. When added to cement-based mixtures, VAE emulsion acts as a water-retention agent, enhancing workability and reducing the risk of cracking. Additionally, the presence of VAE emulsion improves the adhesion between cement mortar and various substrates, such as concrete, bricks, and tiles. This results in stronger bonds and increased overall structural stability, making it an ideal choice for construction projects.   When comparing VAE emulsion with other lotions commonly used in building applications, certain differentiating factors come to light. Firstly, VAE emulsion stands out due to its excellent adhesion properties, providing superior bonding strength. Unlike some lotions, VAE emulsion also offers good resistance to water, ensuring the longevity and durability of the applied coatings, paints, and cement mortar. Moreover, VAE emulsion's low volatile organic compound (VOC) content contributes to a healthier indoor environment, making it an environmentally friendly choice.   VAE emulsion proves to be a valuable addition to the construction industry due to its unique properties and benefits. Whether it's coatings, paints, cement, or mortar, the outstanding adhesion, water resistance, and eco-friendly nature of VAE emulsion set it apart from other lotions. Builders and contractors can confidently choose VAE emulsion knowing that they are employing a reliable and high-performing product for their building projects.   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.