Cellulose Acetate Butyrate for Inks
CAS Number: 9004-36-8
Cellulose acetate butyrate (CAB) is a thermoplastic cellulosic resin used as a secondary binder and viscosity modifier in solvent-based flexographic, gravure, and screen-printing inks, improving flow, adhesion, and compatibility. CAB's low moisture absorption, good UV stability, and miscibility with a wide range of resins make it particularly valuable in exterior-grade inks and automotive coatings.
Technical Specifications
| appearance | White to off-white free-flowing powder |
| viscosity (mPa·s) | 0.05–20 sec (ASTM D1343) |
| butyryl content (%) | 35–55 |
| hydroxyl content (%) | 1.0–5.0 |
| glass transition Tg (°C) | 100–140 |
Applications
- Solvent-based flexo and gravure packaging inks
- Screen-printing inks on plastics and metals
- Automotive and industrial coating inks
- Nail lacquer and cosmetic printing inks
- Wood-furniture printing and coating formulations
Key Features
- Low moisture sensitivity for stable high-humidity printing
- Excellent UV and weathering resistance for outdoor ink durability
- Wide resin compatibility as a secondary co-binder in ink systems
- Improves flow and leveling in high-solids ink formulations
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