Initiator-K 

Product description:   

  　 Di(3,5,5-trimethylhexanoyl) peroxide
　 75% solution in odorless mineral spirits

　 Molecular weight : 314.5
　 Theoretical active oxygen content : 5.09%
　 CAS No. : 3851-87-4

Specification

　 Appearance : Clear liquid
　 Assay :          74.0-76.0%
　 Color :           20 Pt-Co max.
　 Inorganic + organic hydrolyzable chloride : 250mg/kg max.

Physical properties

　 Density, 20℃ :    885 kg/m³
　 Viscosity, 20℃ : 13.0 mPa.s

Half life data

The reactivity of an organic peroxide is usually given by its half life (t1/2) at various temperatures. For Initiator-K in chlorobenzene:
　 t = 　 0.1 hr 　　　 1 hr 　　　　 10 hr
  at 　 96℃ 　　　　 77℃ 　　 　 59℃

Storage

  Ts max. = 0℃ and
  Ts min. = -10℃ to prevent crystallization
When stored according to these recommended storage conditions, Initiator-K will remain within our plant specifications for a period of at least three months after delivery.

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.

Initiator-K is classified as Organic peroxide type D; liquid, temperature controlled;   

     Division 5.2; 　
　 UN 3115; PG II.
　 Rail (RID) and air (ICAO-TI/IATA-DGR) transport are forbidden.

Major decomposition products

Carbon dioxide, 2,2,4,7,9,9-hexamethyldecane, 2,4,4-Trimethylpentane

Application

　 1. Polymerization of ethylene
Initiator-K is an efficient initiator for the ethylene polymerization under high pressure in both autoclave and tubular processes. To obtain a wide spectrum of polymerization temperatures, combinations with other peroxides are applied in practice. Depending on reaction conditions, Initiator-K is active in the temperature range of 150-190℃.

　 2. Polymerization of vinylchloride
Initiator-K is used as an initiator for the suspension and mass polymerization of vinylchloride between 50℃ and 70℃.