Coupling Agents: Titanate vs Aluminate vs Zirconate
Non-silane coupling agents offer distinct advantages over silanes for certain polymer/filler systems, particularly at elevated temperatures or with non-siliceous minerals.
| Spec | ZEMSIL CT-101 | ZEMSIL CT-201 | ZEMSIL CA-821 | ZEMSIL CA-831 | ZEMSIL CZ-201 | ZEMSIL CZ-301 |
|---|---|---|---|---|---|---|
| Metal center | Ti | Ti | Al | Al | Zr | Zr |
| Type | Monoalkoxy titanate | Chelate titanate | Isopropyl aluminate | Phosphate aluminate | Neopentyl zirconate | Neopentyl pyrophosphate Zr |
| Max use temp | ~250 °C | ~180 °C | ~200 °C | ~220 °C | ~280 °C | >300 °C |
| Best filler | CaCO₃, talc, BaSO₄ | Mineral, PVC | Alumina, kaolin | Phosphate minerals | High-temp mineral | High-temp flame-retardant |
| Best for | Filled PP/PE/nylon | PVC processing, cable | Polyolefin, rubber | Phosphate-rich systems | Thermal-stable composites | Extreme-temp composites, nuclear |
How to choose
- ▸For filled polyolefin (PP/PE) or nylon compounding: CT-101 monoalkoxy titanate.
- ▸For PVC and heat-stabilised cable compounds: CT-201 chelate titanate.
- ▸For standard rubber or polyolefin with alumina/kaolin filler: CA-821.
- ▸When filler is phosphate-based or system contains flame retardants: CA-831.
- ▸For >250 °C service or moisture-sensitive high-performance composites: CZ-series zirconate.
Products compared
ZEMSIL CT-101
Isopropyl Triisostearoyl Titanate
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ZEMSIL CT-201
Isopropyl Dioleyl (Dioctylphosphato) Titanate
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ZEMSIL CA-821
Aluminate Coupling Agent (General Purpose)
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ZEMSIL CA-831
Isopropyl Tri(dioctylphosphate) Aluminate
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ZEMSIL CZ-201
Zirconate Coupling Agent (General Purpose)
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ZEMSIL CZ-301
Neopentyl(diallyl)oxy Tri(dioctyl)pyrophosphate Zirconate
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