Peroxide DBPB

DBPB

Product description

　 2,2-Di(tert-butylperoxy)butane
　 50% solution in odorless mineral spirits

　 Molecular weight : 234.3
　 Theoretical active Oxygen content : 13.66%
　 CAS No. : 2167-23-9

Specification

　 Appearance :                     clear colorless liquid
　 Assay :                              50.0±1.0%
　 Color :                                20 Pt-Co max.
　 Hydroperoxides (as TBHP) : 0.3% max.

Physical properties

　Density, 20°C : 875 kg/m³
　Viscosity, 20 °C : 16 mPa.s

Half life data

The reactivity of an organic peroxide is usually given by its half life (t1/2) at various temperatures. 　　
　 For DBPB in chlorobenzene:
　 t 　　　 0.1 hr 　　　 1 hr 　　　　 10 hr
　 at 　　　 136°C 　　　 116°C 　　　 98°C

Major decomposition products

Methane, Ethane, Acetone, tert-Butanol, Carbon dioxide, 2-Methoxy-2-methylpropane

Packaging and transport

The standard packaging is a 25-liter HDPE can for 20 kg peroxide solution. Both packaging and transport meet the international regulations.
DBPB is classified as Organic peroxide type C; liquid, Division 5.2; UN 3103; PG II.

Application

Polymerization of styrene
DBPB can be used for the suspension polymerization and copolymerization of styrene in the temperature range between 90°C and 130°C. During polymerization the temperature is increased in steps.

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