Perkadox GB-50X is a non-caking, free-flowing granular powder curing agent supplied by Nouryon, containing 50% dibenzoyl peroxide. It is formulated for curing unsaturated polyester and (meth)acrylic resin systems at ambient and elevated temperature. This page summarizes the specification data published for this curing agent so composite manufacturers and resin formulators can evaluate it for sourcing.
What Is Perkadox GB-50X?
Perkadox GB-50X is a non-caking, fine, granular powder with excellent free-flowing properties, containing 50% dibenzoyl peroxide (CAS 94-36-0). It is easy to handle, easy to disperse, and dissolves very quickly in unsaturated polyester and (meth)acrylic resins, making it a practical choice where fast, even dispersion is the priority rather than optical clarity.
Technical Specifications of Perkadox GB-50X
The table below lists the core specification and physical properties published for this product.
| Property | Value |
|---|---|
| Appearance | White free flowing powder |
| Assay | 48.0–50.0% |
| Bulk density | 640 kg/m³ |
| Density | 1.343 g/cm³ |
| Poured bulk density | 666 kg/m³ |
| Tapped bulk density | 766 kg/m³ |
| CAS number | 94-36-0 (dibenzoyl peroxide) |
Curing Behavior and Process Temperature
This curing agent is used for the curing of unsaturated polyester and (meth)acrylic resins at both ambient and elevated temperature. At temperatures up to 80℃, it should be used in combination with an aromatic tertiary amine accelerator. Above 80℃, the use of an accelerator is not required. This dual-mode behavior gives formulators flexibility to match Perkadox GB-50X to the specific process temperature of their production line, whether that is a cold-cure ambient process or a heated mold or oven cure.
Applications for Perkadox GB-50X
Because it disperses and dissolves quickly, Perkadox GB-50X is commonly selected for organic peroxide curing applications with unsaturated polyester resin and (meth)acrylic resins where a non-caking, granular, free-flowing peroxide is preferred for ease of metering and handling. Unlike some other dibenzoyl peroxide grades, this product does not dissolve clearly in the resin system, so it is not applicable for producing cured parts when a high degree of optical transparency is required. For transparent applications, the manufacturer’s own documentation points formulators toward Perkadox GB-50L instead.
This makes Perkadox GB-50X a practical default for general unsaturated polyester and acrylic curing in opaque, filled, or pigmented parts, where handling and dispersion speed matter more than resin clarity, while formulators specifically targeting clear cast parts should evaluate the alternative grade referenced above.
The non-caking property of this powder is also a practical handling consideration for plants running automated dosing equipment, since caking or clumping in a peroxide hopper can lead to inconsistent metering and, in turn, inconsistent cure. A free-flowing, non-caking powder is easier to feed reliably through screw or vibratory feeders over extended production runs, which can reduce the need for manual intervention on the shop floor.
Handling Considerations
As with other organic peroxide curing agents, Perkadox GB-50X should be stored, transported, and handled in line with standard organic peroxide practice: keep it away from heat, direct sunlight, and sources of contamination, and avoid mixing it directly with accelerators or reducing agents outside of the intended resin formulation. Buyers should request the current Technical Data Sheet and Safety Data Sheet from the supplier for full handling, storage temperature, and shelf-life guidance specific to their shipment and packaging format before use.
Sourcing This Curing Agent Through chemicalsstore.com
Composite manufacturers and resin formulators sourcing Perkadox GB-50X can contact chemicalsstore.com for current availability, supply chain resource support, and coordination on order volumes, packaging, and documentation requests, including the manufacturer’s Technical Data Sheet and Safety Data Sheet. As a Nouryon-branded organic peroxide, it can also be sourced together with related accelerators and unsaturated polyester resins to simplify procurement for a single production batch.
Frequently Asked Questions About Perkadox GB-50X
What is it made of?
It is 48.0–50.0% dibenzoyl peroxide (CAS 94-36-0) carried on a non-caking, free-flowing powder base.
Does it need an accelerator?
Only below 80℃. At temperatures up to 80℃, it should be combined with an aromatic tertiary amine accelerator. Above 80℃, an accelerator is not required.
Is it suitable for clear or transparent parts?
No. Perkadox GB-50X does not dissolve clearly in the resin system, so it is not applicable where high optical transparency is required. Perkadox GB-50L is recommended for those applications instead.
What is its bulk density?
Bulk density is approximately 640 kg/m³, with poured bulk density around 666 kg/m³ and tapped bulk density around 766 kg/m³.
How should it be stored?
As with other organic peroxides, keep it away from heat, direct sunlight, and contamination. Contact the supplier for the current Technical Data Sheet and Safety Data Sheet for full storage guidance.
To request current availability, technical documentation, or a formal quotation for Perkadox GB-50X, contact the chemicalsstore.com sourcing team with your target volume and application details.
