Bisphenol A diphosphate CAS 5945-33-5 BDP
Bisphenol A diphosphate CAS 5945-33-5 BDP
Bisphenol A diphosphate CAS 5945-33-5 BDP is a halogen-free organophosphorus flame retardant, with advantages such as large molecular weight, high thermal stability, and low volatility. It is widely used in polymer materials such as ABS and PC.
Product Details
| Color(APHA) | ≤80 |
| Acid value (mg KOH/g) | ≤0.1 |
| Water content (wt. %) | ≤0.1 |
| N=1 content (wt. %) | 80-89 |
| Phosphorus content (wt. %) | 8.9(Theory) |
| TPP content (wt. %) | ≤3.0 |
| IPP content (wt. %) | ≤0.05 |
| Phenol content (ppm) | ≤500 |
product advantages
1. High Efficiency (Flame Retardancy):
◦ BDP acts primarily through a gas-phase mechanism. When heated, it decomposes to form PO· radicals, which scavenge the H· and OH· radicals that propagate the combustion cycle in the gas phase, effectively quenching the flame.
◦ It exhibits excellent flame retardant performance in various engineering plastic blends.
2. Halogen-Free & Environmental Compliance:
◦ As a non-halogenated solution, BDP helps manufacturers meet stringent environmental regulations and market demands for safer, more sustainable products (e.g., EU RoHS, REACH, and various green electronics standards).
◦ It does not produce corrosive or dense black smoke and toxic dioxins and furans during combustion, unlike some brominated flame retardants.
3. Excellent Thermal Stability:
◦ BDP has a high thermal decomposition temperature, which makes it suitable for processing engineering plastics at high temperatures (typically up to 300°C and above). This minimizes degradation and yellowing during injection molding or extrusion.
4. Good Compatibility and Mechanical Property Retention:
◦ It demonstrates good compatibility with polymer matrices like PC, ABS, and their blends.
◦ BDP is a liquid, which can act as a plasticizer. While it can slightly reduce the heat deflection temperature (HDT) and modulus, it generally helps in maintaining better impact strength and elongation compared to some solid alternatives. The overall balance of mechanical properties is often superior.
5. Low Volatility and Good Durability:
◦ Due to its high molecular weight and low vapor pressure, BDP has low volatility. This minimizes issues like plate-out during processing and ensures the flame retardancy is long-lasting, as the additive does not easily migrate or evaporate from the finished product.
6. Electrical Properties:
◦ It has minimal negative impact on the electrical insulation properties of the polymers, making it ideal for electrical and electronic (E&E) applications.
product applcations
PC/ABS Alloys:
This is the most significant application for BDP. PC/ABS blends are widely used in electronics enclosures, and BDP is the go-to flame retardant to achieve UL94 V-0 rating (typically at 1.5mm or 2.0mm thickness) while maintaining good processability and mechanical performance.
Typical Applications: Computer monitors, laptop housings, printer and copier components, television bezels.
Polyphenylene Oxide / High-Impact Polystyrene (PPO/HIPS) Blends:
BDP is highly effective in these blends, which are used for large and complex-shaped electronic housings.
Typical Applications: Television back covers, large electrical appliance housings, business machine enclosures.
Polycarbonate (PC):
While other FRs are also used in pure PC, BDP can be employed, often in combination with other synergists, to provide flame retardancy.
Other Polymers:
It can also be used in certain thermoplastic polyesters (like PBT) and polyurethanes, though its use in these is less common than in PC/ABS and PPO/HIPS.
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