2-Acrylamido-2-methylpropane Sulfonic Acid (AMPS)
CAS Number: 15214-89-8
2-Acrylamido-2-methylpropane sulfonic acid (AMPS) is a strongly anionic, thermally stable functional monomer with a sulfonic acid group that remains ionized even at low pH. AMPS copolymers exhibit excellent temperature stability, salt tolerance, and hydrophilicity, making them critical in oilfield scale inhibitors, drilling fluids, superabsorbent polymers, and waterborne coatings.
Technical Specifications
| appearance | White crystalline powder |
| purity (%) | ≥98.0 |
| moisture (%) | ≤0.5 |
| pH (10% solution) | ≤2.0 |
| melting point (°C) | 195–198 |
Applications
- Oilfield scale and corrosion inhibitor copolymers
- High-temperature drilling fluid filtration control additive
- Superabsorbent polymer (SAP) salt-tolerant modification
- Membrane fouling control in water treatment polymers
- Antistatic and antifog coating functional monomer
Key Features
- Full ionization at all pH values (pKa < 1) ensures consistent charge density in polymers
- Bulky 2-methyl substituent prevents hydrogen bonding-induced aggregation
- Exceptional thermal stability up to 200°C for high-temperature oilfield applications
- Outstanding tolerance to divalent cations (Ca2+, Mg2+) critical for seawater applications
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CAS Number
15214-89-8
Category
Polymer Synthesis ChemicalsAvailability
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