Major decomposition products

The Heat Accumulation Storage Test is a recognized test method for the determination of the SADT of organic peroxides (see Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria – United Nations, New York and Geneva).

Carbon dioxide, benzene, benzoic acid, diphenyl, phenylbenzoate

Packaging and transport

In North America Perkadox CH-50 is packed in non-returnable fiber cartons of 50 lb net weight.

In other regions the standard packaging is a non-returnable cardboard box for 25 kg net.

Both packaging and transport meet the international regulations. For the availability of other packed quantities consult your AkzoNobel representative.

Safety and handling         

 Keep containers tightly closed. Store and handle Perkadox CH-50 in a dry well-ventilated place away from sources of heat or ignition and direct sunlight. Never weigh out in the storage room.

    Avoid contact with reducing agents (e.g. amines), acids, alkalis and heavy metal compounds (e.g.             accelerators, driers and metal soaps).

 Please refer to the Safety Data Sheet (SDS) for further information on the safe storage, use and handling of Perkadox CH-50. This information should be thoroughly reviewed prior to acceptance of this product.

The SDS is available at www.akzonobel.com/polymer.

Applications                     Perkadox CH-50 is a free flowing, fine, granular powder containing 50%

dibenzoylperoxide for the curing of unsaturated polyester and acrylic

resins at ambient and elevated temperatures.At temperatures up to 80°C, PerkadoxCH-50 should be used in combination with an aromatic tertiary amine accelerator, above 80°C the use of an accelerator is not required.

Perkadox CH-50 is easy to handle, easy to disperse and dissolves very quickly in unsaturated polyester resins and acrylic resins. When in acrylic resins a very high degree of transparency of the cured part is required the special grade Perkadox CH-50L is advised. The curing system Perkadox CH-50/amine accelerator shows a very fast cure that is hardly influenced by humidity and fillers.Even at low temperatures a relatively good cure will be obtained. A disadvantage may be the yellow color and poor light resistance of the moulded product.

For ambient temperature curing the following amine accelerators are available to adjust the gel time and speed of cure of the cure system based on Perkadox CH-50:

Accelerator NL-65-100 (N,N-Dimethyl-p-toluidine) for short gel times Accelerator NL-63-100 (N,N-Dimethylaniline) for medium gel times Accelerator NL-64-100 (N,N-Diethylaniline) for long gel times

Dosing Depending on working conditions, the following peroxide and accelerator dosage levels are recommended:

Perkadox CH-50 2 - 5 phr ^*

Amine accelerator 0.05 - 0.5 phr

Cure Characteristics In a high reactive standard orthophthalic polyester resin the following

application characteristics were determined.