ASA Sizing Agent (Alkenyl Succinic Anhydride)
CAS Number: 26680-54-6
Alkenyl succinic anhydride (ASA) is a reactive internal sizing agent widely used in neutral and alkaline papermaking systems. It provides excellent hydrophobicity to paper and board, ensuring strong water resistance and printability. ASA reacts covalently with cellulose fibers, delivering durable sizing performance even at low dosage levels.
Technical Specifications
| appearance | Light yellow to amber liquid emulsion |
| pH (1% emulsion) | 3.0–5.0 |
| active content (%) | 97±1 |
| viscosity (mPa·s, 25°C) | 50–200 |
Applications
- Internal sizing of fine paper and board
- Neutral and alkaline papermaking systems
- Printing and writing paper sizing
- Packaging board hydrophobization
- Tissue and specialty paper sizing
Key Features
- Reactive covalent bonding with cellulose for durable sizing
- Effective at neutral and alkaline pH (6.5–8.5)
- Low dosage requirement compared to rosin size
- Compatible with cationic starch and retention aids
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CAS Number
26680-54-6
Category
Paper / Pulp ChemicalsAvailability
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