Description

Perkadox L-W75 is dibenzoyl peroxide (BPO, CAS 94-36-0) supplied as a white granular powder with 75 % peroxide and 25 % water, from Nouryon. The water phlegmatizes the peroxide, which makes it safer to handle and store than dry benzoyl peroxide while keeping the reactivity of BPO.

In thermoset composites, Perkadox L-W75 cures unsaturated polyester, vinyl ester and acrylic resins at ambient or slightly elevated temperature, usually together with a tertiary amine accelerator. Chemical anchors and mine bolts are typical uses. For cobalt-accelerated room-temperature curing, MEKP grades such as Butanox M-50 are the usual alternative. In polymer production it initiates styrene polymerization at 80–100 °C and acrylate polymerization at 65–100 °C. The bifunctional Trigonox 141 offers activity comparable to Perkadox L-W75 with higher polymer molecular weight, and Trigonox C covers the higher 100–140 °C range of styrene polymerization. See all grades in the organic peroxide range.

Perkadox L-W75 key data

Perkadox L-W75 TDS & SDS download

The Perkadox L-W75 product data sheet (TDS/PDS) lists specifications, half-life data and storage limits. The safety data sheet (SDS/MSDS) covers hazard classification, transport and emergency measures. Both English documents can be downloaded below. Data sheets for polymer production and thermoset composites, and Chinese versions, are available on request.

Applications

- Chemical anchors and mine bolts: ambient cure of unsaturated polyester, vinyl ester and methacrylate resins with a tertiary amine accelerator.

- Thermoset composites: cure of UP, VE and acrylic resins at ambient or slightly elevated temperature.

- Polystyrene: initiator for styrene polymerization at 80–100 °C.

- Acrylics: bulk and suspension polymerization and copolymerization of acrylates and methacrylates at 65–100 °C.

- Other monomers: polymerization and copolymerization of vinyl acetate, (meth)acrylonitrile, tetrafluoroethylene, divinylbenzene, para-methylstyrene and diallyl phthalate.

Storage and handling

Store Perkadox L-W75 below 40 °C in tightly closed original packaging, in a dry, well-ventilated area away from heat, ignition sources and direct sunlight. Keep it away from reducing agents such as amines, acids, alkalis and heavy metal compounds. Keep the product moist: the water content is part of its safety formulation. It is shipped as organic peroxide type C, solid (UN 3104).

Perkadox L-W75 FAQ

Q: What is Perkadox L-W75?

A: Perkadox L-W75 is Nouryon's dibenzoyl peroxide (BPO), CAS 94-36-0, supplied as a white granular powder with 75 % peroxide and 25 % water. It is used to cure UP, vinyl ester and acrylic resins and to initiate styrene and acrylate polymerization.

Q: Why does Perkadox L-W75 contain 25 % water?

A: The water phlegmatizes the benzoyl peroxide, which reduces its sensitivity and makes it safer to handle, store and transport than dry BPO.

Q: How is Perkadox L-W75 used to cure polyester resin?

A: It cures unsaturated polyester, vinyl ester and acrylic resins at ambient or slightly elevated temperature, usually combined with a tertiary amine accelerator. Chemical anchors and mine bolts are typical applications.

Q: What is the half-life temperature of Perkadox L-W75?

A: Measured in chlorobenzene, its 10-hour half-life temperature is 71 °C, its 1-hour half-life temperature is 91 °C and its 0.1-hour half-life temperature is 113 °C. Its SADT is 70 °C.

Q: How should Perkadox L-W75 be stored?

A: Store it below 40 °C in closed original packaging, away from heat, sunlight, amines, acids, alkalis and heavy metal compounds. Under these conditions it stays within specification for at least 3 months after delivery.

Q: Where can I get the Perkadox L-W75 TDS and SDS?

A: The English product data sheet and safety data sheet can be downloaded on this page. Send an inquiry for application-specific data sheets or Chinese versions.