Introduction of Dicumene
Dicumene
2,3-dimethyl-2,3-diphenylbutane
CAS: 1889-67-4
Molecular Formula: C18H22
Molecular Weight: 238
Appearance: white to yellow powder
Mp: 100~115 ℃ (dec)
Purity: 96% (min) (HPLC)
Initiation temperature: 230℃
Half time: 0.1hr 284℃
1hr 259℃
10 hr 237℃
Dicumene is a flame retardant synergist, designed for the use in polyolefins as well as in polystyrenes especially in EPS and HIPS, presenting technical performances such as high thermal stability, improvement of flow properties and excellent fire proofing.
It was widely used in ABS/SAN, Engineering Plastics, GPPS, HIPS, Polystyrene (All Purpose), Polystyrene (Expandable), PS, PS (High Impact), Styrenic (co) Polymers.
Especially, dicumene could be used in EPS with adding level 0.5-1%, that could decrease the dosage of brominate flame retardant additive evidently, such as HBCD. In HIPS direction, the adding leve of dicumene was only 30% of antimony trioxide.
As an environmental friendly alternative for antimony trioxide, Dicumene is able to significantly reduce its use in polypropylene, polyethylene and polystyrene. For achieving UL 94 V2 standard, antimony trioxide can be completely substituted by Dicumene in most of the cases. At the same
time the use of brominated flame retardants can be reduced as well.
Dicumene was also used in PP and PE masterbatches, act as plastic initiator, grafting agent.
Dicumene is showing next to a good thermal stability – compared to dicumol peroxide – an improving flowability of the material. In addition the low dosing of 0.2% - 2% offers economic advantages .
• Dicumene is an environment friendly substitute for Sb2O3 which contains heavy metal.
• High temperature Chain Initiator for high molecular wt. polyester
• Polymerization initiator for bulk polymerisation of styrene and alkenyl
silane and alkene.
