Ammonium Polymethacrylate Ceramic Deflocculant (Darvan Type)
Ammonium polymethacrylate (APMA) is a premium polymeric dispersant functionally equivalent to Vanderbilt Darvan C and Darvan 7-N, widely used in studio and industrial ceramics for deflocculating casting slips. APMA provides excellent electrosteric stabilization of clay, alumina, and mixed ceramic systems at very low dosages (0.1–0.3% on solids), producing fluid slips with high solids content and excellent casting behavior.
Technical Specifications
| appearance | Colorless to light amber aqueous solution |
| purity (%) | ≥97 |
| pH (as-supplied) | 7.5–9.5 |
| solid content (%) | 25–35 |
| molecular weight (g/mol) | 8000–20000 |
Applications
- Deflocculant for porcelain and stoneware casting slips
- Dispersant for studio ceramics slip casting applications
- Co-dispersant with sodium silicate in traditional ceramics
- Dispersant for sanitaryware and tableware casting operations
- Dispersant in alumina and technical oxide ceramic slips
Key Features
- Functionally equivalent to Darvan C with reliable deflocculation performance
- Very low required dosage minimizes organic content in green bodies
- Ammonium counter-ion decomposes cleanly during binder burnout
- Compatible with all major clay minerals and oxide ceramic systems
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