Perkadox BTW-50
CAS number 94-36-0
Perkadox® BTW-50 is the preferred BPO paste for unsaturated polyester & vinyl ester resins.
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0Perkadox® BTW-50 is the preferred BPO paste for unsaturated polyester & vinyl ester resins.
Product Description
Perkadox® BTW-50 is the preferred BPO (benzoyl peroxide) paste for unsaturated polyester and vinyl ester resins. It is a paste containing 50% dibenzoyl peroxide, without phthalate, for curing unsaturated polyester resins at ambient and elevated temperatures. At temperatures up to 80°C, Perkadox® BTW-50 should be used with an aromatic tertiary amine accelerator; above 80°C, no accelerator is required.
Perkadox® BTW-50 has primarily been developed for the putty market. For non-filled systems, Perkadox® 40E is better suited with respect to miscibility with the UP resin. Perkadox® BTW-50 shows very good chemical and physical stability and is well suited for tube filling. The Perkadox® BTW-50/amine accelerator curing system gives a very fast cure that is hardly influenced by humidity and fillers, with relatively good cure even at low temperatures. A disadvantage may be the yellow color and poor light resistance of the moulded product.
| CAS Number | Active oxygen content peroxide |
| 94-36-0 | 6.61% |
| Appearance | EINECS/ELINCS |
| White homogeneous paste | No.202-327-6 |
| TSCA status | |
| Listed on inventory | |
| Characteristics | |
| Density, 20°C | 1.200 g/cm³ |
| Viscosity, 20°C | thixotropic paste mPa.s |
| Application | |
● Putty market formulations ● Tube filling (good chemical and physical stability) ● Applications requiring cure performance tolerant of humidity and fillers ● Low-temperature curing where a relatively good cure is still required Thermal Stability & StorageAs with all organic peroxides, Perkadox® BTW-50 is thermally unstable and can undergo self-accelerating decomposition. The Self-Accelerating Decomposition Temperature (SADT), determined by the Heat Accumulation Storage Test per UN Recommendations on the Transport of Dangerous Goods, is 50°C (122°F). This is a temperature-controlled organic peroxide. Per the source PDS: ● Maximum storage temperature (Ts max.): 25°C (77°F) ● Control temperature (Tc): 40°C (104°F) ● Emergency temperature (Te): 45°C (113°F) Under recommended storage conditions, Perkadox® BTW-50 remains within specification for at least 3 months after delivery. Store in a dry, well-ventilated place away from heat and ignition sources and direct sunlight; never weigh out product in the storage room; avoid contact with reducing agents (e.g. amines), acids, alkalis, and heavy metal compounds (e.g. accelerators, driers, metal soaps). Refer to the Safety Data Sheet for full handling guidance, including emergency-temperature response procedures, prior to use.
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