Polyvinyl Butyral, Polyvinyl Acetal, Recycled PVB, PVB Resin, PVB, 63148-65-2

POLYVINYL BUTYRAL (PVB) – TECHNICAL DATA SHEET

PRODUCT IDENTIFICATION INFORMATION

CHEMICAL STRUCTURE

    Polyvinyl Butyral (PVB) Structure
    
    Three Main Components:
    
    1. Butyral Groups (Main – 65-85%)
       CH₂ — CH — CH₂ — CH —
             |         |
             O         O
             |         |
             CH        CH₂
            /   \       |
           CH₂   CH₂   CHO
                 |
                CH₃
    
    2. Hydroxyl Groups (OH – 15-30%)
       CH₂ — CH —
             |
             OH
    
    3. Acetate Groups (OAc – 0-5%)
       CH₂ — CH —
             |
             OCOCH₃

Functional Groups:

• Butyral Groups: Provide flexibility, adhesion, hydrophobicity

• Hydroxyl Groups: Enable crosslinking, solubility, adhesion

• Acetate Groups: Balance mechanical and chemical properties

SECTION 1: CHEMICAL IDENTITY AND DEFINITION

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 3: PVB GRADE TYPES AND CLASSIFICATION

Class 1: Laminated Glass Interlayer (Film) Grade

Application Areas:

• Automotive windshields and side windows

• Architectural safety glass

• Acoustic laminated glass

• UV-filtered glass

Performance Criteria:

• High impact absorption and fragment retention upon breakage

• Excellent optical clarity (%T) and low haze

• High glass surface adhesion (Peel test)

• Yellowing resistance (Yellowness Index - YI)

• Good acoustic damping (depends on plasticizer formulation)

• High uniformity in thickness tolerance

Class 2: Adhesive and Coating Binder (Powder/Granule) Grade

Application Areas:

• Adhesive resin for ceramic, metal, and textile surfaces

• Flexible packaging and printing inks

• Metal primers and anti-corrosive coatings

• Wood coatings and varnish binders

• Electrical insulation varnishes

• Ceramic transfer printing and screen printing inks

SECTION 4: MOWITAL® SERIES GRADES

Grade Nomenclature

SECTION 5: THIN FILM SERIES (PLASTICIZER-FREE)

SECTION 6: VISCOSITY-BASED APPLICATION AREAS

SECTION 7: KEY FUNCTIONAL PROPERTIES

SECTION 8: MAIN APPLICATION AREAS

SECTION 9: RECYCLED PVB (rPVB)

rPVB Application Advantages:

• Cost Advantage: 20-40% lower price

• Sustainability: Waste reduction, lower carbon footprint

• Brand Value: Environmental approach, corporate prestige

• Consistent Quality: Controlled recycling process

• Less Equipment Wear: Lower volatile matter and gel particles

• Use in Existing Lines: Same process as virgin PVB

rPVB Application Areas:

• Printing inks (screen, flexo, gravure)

• Adhesives (metal, wood, ceramic, textile)

• Primers (anti-corrosive coatings)

• Powder coatings (flow agent and binder)

• Recycled laminated glass production

SECTION 10: FORMULATION RECIPES

Recipe A: Screen Printing Ink (Glass/Ceramic)

Recipe B: Metal Primer (Anti-Corrosive)

Recipe C: Phenolic Crosslinked Coating

SECTION 11: ALTERNATIVE MATERIALS COMPARISON

SECTION 12: QUALITY SPECIFICATIONS (CLASS 2 - POWDER/GRANULE)

SECTION 13: TOXICOLOGICAL PROFILE

SECTION 14: GHS CLASSIFICATION AND LABELING

GHS Classification (Compliant with CLP and UN GHS):

Note: PVB is generally considered non-hazardous. However, powder form may cause mechanical irritation.

SECTION 15: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 16: FIRST AID MEASURES

SECTION 17: FIREFIGHTING MEASURES

SECTION 18: STORAGE AND SHELF LIFE

SECTION 19: TRANSPORT INFORMATION

SECTION 20: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• PVB dust may cause mechanical irritation if inhaled. Use appropriate dust control measures.

• Non-combustible but may decompose at high temperatures.

• Protect from moisture. Moisture causes turbidity and film defects in solutions.

• Proper grade selection is critical for application success. Incorrect viscosity or acetalization degree will negatively affect performance.

• Thin Film products do not contain plasticizers; require special processing conditions.

• When using rPVB, slight viscosity differences between batches may occur; can be adjusted with solvent ratio.

• Solvent-based systems must comply with VOC regulations.

• Final product must meet relevant local optical, impact, and safety standards depending on application area (automotive, architectural).

BEST PRACTICE RECOMMENDATIONS:

• Solution Preparation (Class 2): Powder or granule resin should be added slowly to the appropriate solvent mixture under controlled stirring. Allow sufficient dissolution and swelling time to prevent agglomeration. Keep water traces to a minimum.

• Film Processing (Class 1): Extrusion/Calendering: 160-200°C processing range; moisture and solvent control is critical. Plasticizer: Typically formulated with 20-40% plasticizer for film performance. Lamination: Glass-interlayer-glass bonding requires autoclave at 10-14 bar pressure and 120-140°C temperature.

• rPVB Usage: Prepare solvent mixture first; add rPVB slowly with continuous stirring. Allow 2-4 hours for complete dissolution. Protect the product from moisture after opening. For highest quality, filter the prepared solution through 10-20 micron filter.

• Glass Lamination (Class 1): Select appropriate film thickness (50-250 µm); Use on clean, dry surfaces; Comply with safety standards for automotive and architectural applications.

• Coatings and Inks (Class 2): Use medium viscosity grades for anti-corrosion primers; Use low viscosity grades for pigment dispersions.

• Adhesives: Use PVB in pressure-sensitive and hot-melt adhesives; Can be modified with epoxy or isocyanate-based crosslinkers.

• Handling: Use in well-ventilated areas; Avoid dust generation; Wear protective gloves, safety goggles, and appropriate respiratory protection.

• Storage: Store in cool, dry, well-ventilated areas; Protect from direct sunlight and moisture; Keep in closed containers.

• Disposal: Dispose of in accordance with local, regional, and national regulations.

RECYCLED PVB (rPVB) SPECIAL NOTES:

• Moisture Control: Protect the product from moisture after opening. Moisture causes turbidity and film defects.

• Viscosity Adjustment: Slight viscosity differences between rPVB batches may occur; can be easily adjusted with solvent ratio in your formulation.

• Filtration: For highest quality, filter the prepared solution through a fine filter (10-20 microns) before use.

• Cost Advantage: rPVB price is 20-40% lower than virgin PVB resin.

• Sustainability: Recycling waste material reduces carbon footprint and waste disposal costs.

LEGAL DISCLAIMER:

The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, this document does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing suitability for their own applications. For complete safety, storage, handling, transportation, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.