CCP Changchun BP26 (2688) Ultra-High-Viscosity Partially Hydrolyzed Polyvinyl Alcohol for Thick Coatings & Industrial Binders

Full Name: CCP Changchun BP26 Ultra-High Viscosity High-Barrier Partially Hydrolyzed Polyvinyl Alcohol (Model 2688) Highest polymerization partially hydrolyzed grade within full BP series, optimal tensile film strength and oxygen barrier property, targeting ultra-high abrasion resistance, special thick coating and high-strength industrial bonding scenarios. Core Technical Parameters Viscosity (4% aqueous solution, 20℃) 50~58 mPa·s Degree of Hydrolysis 86~89 mol% Appearance  White pellets Volatile Content ≤5.0 % Ash Content ≤0.4 % pH Value (4% aqueous solution) 5~7 Purity ≥99.0 % Standard Package 20kg/bag, 1kg trial packs available CAS No. 9002-89-5   Core Advantages 1.  Highest viscosity among BP series to form dense & tough film with excellent tensile & abrasion resistance. 2.  Outstanding oxygen barrier effect, applicable for barrier coating of indirect food packaging (no direct oral contact). 3.  Greatly improved forming strength of heavy industrial fabrics and industrial filter paper after impregnation. 4.  No pinholes or cracks after thick coating drying with long-lasting coating adhesion. 5.  Compatible with high-viscosity starch to significantly improve overall strength of bonding systems. Main Application Fields Core Applications: Industrial filter paper impregnation, ultra-high abrasion resistant heavy textile sizing, high-barrier thick-layer water-based coating Compatible Fields: High-strength industrial paper adhesive, refractory binder, temporary protective heavy anti-corrosion primer additive Forbidden Scenarios: Oral food raw materials, high-speed thin coating low-viscosity production lines, UV curing low-viscosity ink