In suspension polymerization processes, DBPH-141 can be used for the polymerization of styrene at approximately 90°C. DBPH-141 has an activity comparable with Dibenzoyl peroxide (L-W75). However, the bifunctional DBPH-141 gives higher molecular weights of the polymer. Applying the same molecular weights means a reduction of polymerization time.

Specifications

2,5-dihydroperoxy-2,5-dimethylhexane	≤ 2.2 %
Appearance	Clear liquid
Assay	≥ 92.0 %
Color	≤ 20 Pt-Co
Inorganic + organic hydrolysable chloride	≤ 100 mg/kg

Characteristics

Density, 20 °C	0.956 g/cm³
Viscosity, 20 °C	80 mPa.s
Assay	≥ 92.0 %

Applications

DBPH-141 can be used for the market segments: polymer production and thermoset composites with their different applications/functions. For more information please check our website and/or contact us.

Thermal stability

Organic peroxides are thermally unstable substances, which may undergo self-accelerating decomposition. The lowest temperature at which self-accelerating decomposition of a substance in the original packaging may occur is the Self- Accelerating Decomposition Temperature (SADT). The SADT is determined on the basis of the Heat Accumulation Storage Test.

SADT	35°C (95°F)
Emergency temperature (T。 )	25°C (77°F)
Control temperature (Tc)	20°C (68°F)
Method	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).

Storage

Due to the relatively unstable nature of organic peroxides a loss of quality can be detected over a period of time. To minimize the loss of quality, Nouryon recommends a maximum storage temperature (Ts max. ) for each organic peroxide product.

Ts max.	15°C
Note	When stored according to these recommended storage conditions, DBPH-141 will remain within the Nouryon specifications for a period of at least 3 months after delivery.

Packaging and transport

The standard packaging is a 30-liter HDPE can for 25 kg peroxide. Both packaging and transport meet the international regulations. For the availability of other packed quantities consult your Thousands Chemicals representative. DBPH-141 is classified as Organic peroxide type C; liquid, temperature controlled, Division 5. 2; UN 3113.

Safety and handling

Keep containers tightly closed. Store and handle DBPH-141 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 DBPH-141. This information should be thoroughly reviewed prior to acceptance of this product.

Major decomposition products

Carbon dioxide, Acetone, 2-Pentanone, Heptane, Heptenes, tert-Amyl alcohol, 2,5-Bis(1-ethylpentoxy)-2,5- dimethylhexane, 2,5-Dimethyl-2,5-hexanediol.