Eastman CAB-381-20 is an ultra - high viscosity modified resin in the cellulose acetate butyrate series, specially customized for high - performance automotive primer, clear coat and other systems. It has strong compatibility with various resins, can accelerate solvent release to shorten drying time, promote aluminum powder orientation to enhance metallic flash effect, inhibit intercoat bleeding and lifting, endow coatings with excellent flexibility
Ultra - High Viscosity & Adaptability - Suitable for automotive primer and clear coat, meeting the requirements of high - viscosity systems and improving coating texture and stability
Drying Acceleration & Orientation Enhancement - Accelerate solvent volatilization to shorten touch - dry time, promote aluminum powder orientation and enhance metallic paint flash effect
Broad Compatibility & Stability - Miscible with acrylic, amino and other resins, improving system stability and inhibiting intercoat bleeding and lifting
Flexibility & Long - lasting Crack Resistance - Endow the paint film with excellent flexibility, yellowing resistance and cold crack resistance, ensuring long - term stable appearance of coatings for outdoor use
Automotive OEM/Refinish Primer - Promote primer shrinkage and aluminum powder orientation, and improve coating corrosion resistance and decorative performance
Automotive Clear Coat Systems - Enhance adhesion and gloss, improve gloss retention, and meet the needs of cross - linking and fast drying
High - end Metallic Coatings - Accelerate solvent release to shorten drying time, and enhance coating wear resistance and color stability
Plastic Protective Coatings - Improve flexibility and cold crack resistance, suitable for coating plastic casings of electronics, home appliances, etc
| Product Model | CAB-381-20 |
| Brand | Eastman |
| Chemical Name | Cellulose Acetate Butyrate (CAB) |
| Appearance | White free-flowing powder |
| Viscosity | 20 sec / 76 poise |
| Acetyl Content | 13.5% |
| Butyryl Content | 37% |
| Hydroxyl Content | 1.8% |
| Melting Range | 195–205°C |
| Glass Transition Temperature (Tg) | 141°C |
| Tukon Hardness (Knoop) | 18 |
| Weight/Volume Ratio | 10 lb/gal (1.2 kg/L) |
| Molecular Weight (Average) | 70,000 |
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