Perovion BPO P-L75 is a dibenzoyl peroxide (BPO) initiator supplied as a 75% wet paste with water for safe handling, used for the polymerization of styrene, acrylonitrile, vinyl acetate, methacrylates, and acrylates, as well as for curing unsaturated polyester, vinyl ester, and acrylic thermoset resins at ambient or slightly elevated temperatures. Perovion BPO P-L75 is commonly paired with tertiary amine accelerators for ambient-temperature cure and is widely used across cast polymer, panel, chemical anchor, and resin transfer molding (RTM) production.
Perovion BPO P-L75 Overview
The water-wetted paste form of Perovion BPO P-L75 keeps the dibenzoyl peroxide desensitized and easier to handle safely compared to dry powder grades, while still providing reliable radical initiation once dispersed into the resin or monomer system. This makes it a practical choice for fabricators who need a solid-form BPO initiator without the handling risks associated with unwetted peroxide powders. The water content also helps moderate the rate of decomposition during storage and transport, which is one reason wet-paste and wet-powder BPO grades are widely preferred over dry powder in general industrial handling.
Formulators evaluating BPO initiators for the first time should note that reactivity and gel-time behavior depend heavily on the accelerator system and dosage used alongside the peroxide, rather than on the peroxide alone. Working with a supplier that can advise on typical dosage ranges for a given resin and accelerator combination helps shorten the qualification process when introducing this grade into an existing production line.
Key Features
- Wet paste form: Supplied as a 75% dibenzoyl peroxide paste with water, which reduces sensitivity to friction and impact compared to dry powder, making Perovion BPO P-L75 easier and safer to weigh out and dose on the shop floor.
- Broad monomer compatibility: Initiates polymerization of styrene, acrylonitrile, vinyl acetate, methacrylates, and acrylates, giving formulators flexibility across multiple resin and monomer systems with a single initiator grade.
- Ambient and elevated-temperature cure: Suitable for curing unsaturated polyester, vinyl ester, and acrylic thermoset resins at ambient or slightly elevated temperatures, typically in combination with a tertiary amine accelerator.
- Established process fit: Long-standing use in cast polymer, panel, chemical anchor and mine bolt, and RTM production means processors can draw on well-documented dosing and handling practices for this chemistry.
- Defined shelf life: Like other organic peroxides, this product has a limited shelf life and should be used within the period specified on the certificate of analysis to ensure consistent reactivity.
Typical Applications
Perovion BPO P-L75 is used as a radical initiator in the polymerization of styrene, acrylonitrile, vinyl acetate, methacrylate, and acrylate monomers, and as a curing agent for unsaturated polyester, vinyl ester, and acrylic thermoset resin systems. In resin curing applications it is typically combined with a tertiary amine accelerator to achieve reliable cure at ambient or only slightly elevated temperatures, without requiring external heat input. This ambient-cure capability is particularly valuable for large or field-fabricated parts where ovens or heated tooling are impractical.
Common end uses include cast polymer and cultured marble production, decorative and structural panels, chemical anchors and mine roof bolting resins, and resin transfer molding (RTM) for composite parts. These applications benefit from the paste form’s ease of dosing and its compatibility with amine-accelerated ambient cure systems already common in these industries. Processors switching from another BPO paste grade typically find that existing accelerator ratios and gel-time targets carry over with only minor adjustment.
Technical Specifications
- Chemical Type: Dibenzoyl peroxide (BPO), 75% with water
- CAS Number: 94-36-0
- Appearance: White wet paste
- Active Content: 75% (nominal)
- Total Active Oxygen: To be confirmed based on the final specification sheet.
- Water Content: To be confirmed based on the final specification sheet.
- Shelf Life: Approximately 3 months under recommended storage conditions
Thermal Stability
- Organic peroxides are thermally unstable substances and must be handled with appropriate care.
- SADT: To be confirmed based on the final specification sheet.
Storage Recommendations
- Recommended maximum storage temperature: To be confirmed based on the final specification sheet.
- Store in a dry, well-ventilated area away from heat sources and direct sunlight.
- Keep containers tightly closed and never weigh out product in the storage room.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds.
Packaging & Transport
- Standard Packaging: To be confirmed based on the final specification sheet.
- Net Weight: To be confirmed based on the final specification sheet.
- UN Number: UN 3104
- Transport Class: Organic peroxide, Type C, solid, Division 5.2, Packing Group II
Facilities running mixed production schedules across several resin systems often value having a single, well-documented BPO paste grade that can support multiple end uses, since this can reduce the complexity and cost of qualifying separate initiators for each product line. First-in, first-out stock rotation and dating of containers on receipt are recommended given the limited shelf life typical of this chemistry.
Perovion BPO P-L75: Safety & Handling
Perovion BPO P-L75 should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing material and requires appropriate storage and handling measures, including keeping it segregated from reducing agents, accelerators, and other incompatible substances.
Users, particularly those new to handling solid organic peroxides, are advised to review the Safety Data Sheet carefully prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein, including care during weighing and transfer to avoid generating dust or friction. Spill response equipment and appropriate fire suppression rated for organic peroxide fires should be available wherever this product is stored or handled in volume, and staff should be trained on correct handling procedures before working with it unsupervised, with periodic refresher training recommended for personnel who handle organic peroxides only occasionally.
Safety Data Sheet and destination-compliant labeling information for Perovion BPO P-L75 are available upon request, and should be reviewed by all personnel before first use at a new site. For related dibenzoyl peroxide grades, see also Perovion BPO PA-BT and Perovion BPO P-GB.