Peroxide CHP

CHP

Product description

　 Cumyl hydroperoxide
　 80% solution in aromatic solvent mixture

　 Molecular weight : 152.2
　 Theoretical active Oxygen content : 10.51%
　 CAS No. : 80-15-9

Specification

　 Appearance :                         Clear colorless liquid
　 Assay :                                 80.0-85%
　 Color :                                   450 Pt-Co max.

Physical properties

　 Density, 25℃ : 1040 kg/m³ 　 Viscosity, 20℃ : 10.4 mPa.s

Half life data

The reactivity of an organic peroxide is usually given by its half life (t1/2) at various temperatures.

For CHP in chlorobenzene:
　 t 　　　　 0.1 hr 　　　　　 1 hr 　　　　　 10 hr
　 at 　　　 195℃ 　　　　　 166℃ 　　　　 140℃

Major decomposition products

　 Acetophenoen, 2-phenyisopropanol, Methane,

Storage

　 For CHP Ts max.= 40℃ and
　 Ts min. = -30℃

Packaging and transport

The standard packaging is a 25-liter HDPE can for 25 kg peroxide solution or a 220-liter HDPE drum for 200 kg peroxide solution.

CHP is classified as Organic peroxide type F, liquid; Division 5.2; UN 3109; PG II.

Application

CHP may be used for various polymerization reactions. It can be used in emulsion solution and bulk polymerizations.

When no accelerators are used effective polymerization can be obtained in the temperature range of 50-200℃. For example, styrene and methyl methacrylate can be bulk polymerized in the temperature rang of 60-100 0Cusing CHP.

In emulsion processes, CHP may be activated by organic-soluble or water-soluble reducing agent as well as by metal compound to achieve polymerization at room temperature or lower.

CHP is especially developed for the cure of vinylester or phenacryl resins in combination with a cobalt accelerator.

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