Kuraray POVAL PVA-205MB Low-Foam Polyvinyl Alcohol 5-88MB Low Viscosity Defoaming Type High-Speed Coating Adhesive Grade

Full Name & Product Positioning Full Product Name:  Kuraray POVAL™ PVA-205MB (5-88MB) Low-Foam Partially Hydrolyzed Polyvinyl Alcohol PVA-205MB (also known as 5-88MB) is a low-viscosity (4.6-5.4 mPa·s), partially hydrolyzed (86.5-89.0 mol%) low-foam polyvinyl alcohol in the Kuraray POVAL™ series. The product formulation contains a defoaming component, resulting in significantly lower foam generation during high-speed stirring, coating, and pumping compared to standard PVA. It is particularly suitable for high-speed paper coating, film coating, and adhesive and emulsion polymerization applications requiring low-foam characteristics. Core Technical Parameters Parameter Typical Value Product Type Low-foam partially hydrolyzed polyvinyl alcohol Also Known As 5-88MB Viscosity (4% aqueous soln., 20°C) 4.6 - 5.4 mPa·s Degree of Hydrolysis 86.5 - 89.0 mol% Volatile Matter ≤5.0 wt% pH (4% aqueous soln.) 5.0 - 7.0 Appearance White powder / granules Characteristic Contains defoaming component; low-foam type CAS Number 9002-89-5 Standard Packaging 20kg/bag Key Advantages (Performance based on measured conditions from original manufacturer TDS. Actual results vary with formulations and do not guarantee end-use performance.) 1.  Low-foam formulation reduces foam generation during high-speed stirring, coating, and pumping, minimizing the need for additional defoaming agents; 2.  Low viscosity grade allows preparation of higher-solids aqueous solutions, supporting coating operational efficiency; 3.  Partially hydrolyzed structure provides good cold-water dispersibility, fast dissolution, and high aqueous solution clarity; 4.  Good film flatness; low-foam characteristics help reduce coating defects such as pinholes and bubbles; 5.  Suitable for high-speed paper coating, film surface treatment, and emulsion polymerization protective colloid applications sensitive to foam. Main Application Areas Core Applications:  High-speed paper coating adhesives, film coating additives, low-foam adhesives Compatible Applications:  Protective colloid for vinyl acetate emulsion polymerization (low-foam type), inkjet printing media coatings, paper converting adhesives Not Recommended For:  Food or oral-ingestion articles, high-end electronic-grade applications sensitive to defoaming agent components