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High adhesion strength to glass and polycarbonate substrates.
Excellent optical clarity and UV stability for long-term transparency.
Optimized melt flow behavior for efficient extrusion and lamination processes.
Consistent batch-to-batch quality with stringent raw material control.
Low volatile organic compound (VOC) emission profile suitable for indoor applications.
Laminated safety glass for automotive windshields and side windows.
Architectural glazing interlayers in façades, skylights, and balustrades.
Photovoltaic module encapsulation for enhanced moisture barrier performance.
Acoustic interlayers in noise-reducing laminated glass assemblies.
Specialty laminates for bullet-resistant and blast-mitigation systems.
| Chemical Type | Polyvinyl butyral (PVB) copolymer |
| Product Form | Free-flowing granules |
| Appearance | Off-white to light yellow granules |
| Primary Applications | Safety glass interlayer, photovoltaic encapsulant |
| Key Features | High tack, balanced stiffness-toughness ratio |
| Benefits | Enhanced delamination resistance and impact energy absorption |
| Storage Conditions | Store in dry, cool environment (≤30°C, RH < 60%) |
| Compliance | Meets ISO 12543-3 for laminated glass interlayers |
Q1: What is the primary functional role of Kuraray PVB B45H in adhesive and coating formulations?
A: Kuraray PVB B45H serves primarily as a high-performance binder and tackifier, enhancing green strength, interfacial adhesion, and film-forming capability—particularly in solvent-based laminating adhesives, protective coatings, and ceramic tape casting systems.
Q2: How does B45H differ from other PVB resins in terms of solubility and processing behavior?
A: B45H exhibits balanced solubility in common organic solvents such as ethanol, ethyl acetate, and toluene blends, enabling stable solution preparation without excessive heating or extended mixing. Its medium molecular weight and butyralization level support good viscosity control and compatibility with both polar and moderately non-polar resin systems.
Q3: Is Kuraray PVB B45H suitable for use in safety glass interlayer applications?
A: No—B45H is not formulated or qualified for structural safety glass interlayers. It is designed for industrial adhesive, coating, and binder applications where moderate flexibility, clarity, and adhesion are required—not for high-impact, optically critical, or certified laminated glass systems.
Q4: What are key storage and handling recommendations for this resin?
A: Store in original sealed packaging at temperatures between 5–30°C, away from direct sunlight and moisture. Avoid prolonged exposure to humid environments, as PVB resins are hygroscopic and may require pre-drying before solvent-based processing if exposed to ambient air for extended periods.
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E-mail: wangxingqiang@ericwchem.com
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