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High optical clarity and exceptional transparency for premium laminated safety glass applications.
Excellent adhesion to both glass and polycarbonate substrates without requiring primers.
Superior impact resistance and energy absorption performance under dynamic loading conditions.
Consistent melt flow behavior enabling stable extrusion and lamination process control.
Low yellowing tendency and excellent long-term UV stability in outdoor environments.
Automotive laminated windshields and side windows.
Architectural safety glazing for facades, skylights, and overhead installations.
Security glazing systems including blast-resistant and forced-entry resistant laminates.
Photovoltaic module encapsulation layers for enhanced durability and moisture barrier performance.
Acoustic interlayers in noise-reducing laminated glass for transportation and building applications.
| Chemical Type | Polyvinyl butyral (PVB) resin |
| Product Form | Free-flowing white granules |
| Appearance | Off-white to light yellow granular solid |
| Primary Applications | Laminated safety glass interlayer |
| Key Features | High clarity, strong adhesion, impact absorption, UV stability |
| Benefits | Process reliability, optical quality, safety compliance (e.g., ISO 16938, EN 14449) |
| Storage Conditions | Store in dry, cool, well-ventilated area; protect from moisture and direct sunlight |
| Standard Packaging | 25 kg multi-layer moisture-barrier polyethylene-lined paper bags |
Q1: What is the primary functional role of S-LEC PVB BL-1H in coating and ink formulations?
A: S-LEC PVB BL-1H serves primarily as a film-forming binder and adhesion promoter, enhancing substrate wetting, improving interlayer cohesion, and contributing to mechanical durability and flexibility in solvent-based coatings, gravure inks, and overprint varnishes.
Q2: Is S-LEC PVB BL-1H compatible with common industrial solvents and resin systems?
A: Yes — it exhibits good solubility in standard organic solvents such as ethanol, isopropanol, ethyl acetate, and toluene, and is commonly blended with nitrocellulose, acrylic resins, and alkyd systems to modify rheology and film integrity without phase separation.
Q3: How does BL-1H differ from other grades in the S-LEC PVB series?
A: BL-1H is formulated with a balanced butyral/acetal/hydroxyl composition optimized for rapid dissolution and high clarity in thin-film applications, offering improved compatibility with fast-drying solvent systems compared to higher-molecular-weight or more highly butyralized variants.
Q4: Can S-LEC PVB BL-1H be used in food-contact compliant coatings?
A: While PVB resins are widely employed in food packaging inks and coatings, regulatory compliance depends on the full formulation, processing conditions, and end-use requirements. Customers must validate suitability through appropriate migration testing and regulatory review for their specific application.
Q5: What handling precautions should be observed during storage and processing?
A: Store in a cool, dry place away from direct sunlight and moisture. Keep containers tightly sealed to prevent solvent absorption or agglomeration. Use standard industrial hygiene practices when handling powders or solutions, including adequate ventilation and personal protective equipment as appropriate for solvent exposure.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
