PRODUCT

DICUMENE

CHEMICAL NAME &

STRUCTURE

2,3-Dimethyl-2,3-diphenylbutane

CAS Number     :  1889-67-4 

EINECS/ELINCS No.:

217-568-2

R-phrase(s):  none

TSCA status: Listed on Inventory

SPECIFICATIONS

Properties          :  White to light yellow flakes or powder

Melting range     :  90 -110°C

Active material   :  95% min.

Storage and Handling:

.      A maximum storage temperature of 30°C (86°F) is recommended.

.      Keep containers tightly closed, Store and handle in a dry well-ventilated place away from source of heat or ignition and sunlight.

.      Avoid contact with reducing agents (e.g. amines), acids, alkalies and heavy metal compounds.

Half-Life Data:

The reactivity of a C-C initiator is usually given by its half-life (t_1/2) at various temperatures. For Dicumene in chlorobenzene:

The half-life at other temperatures can be calculated by using the following equations and constants:  

E_a = 230.19kj/mole;   A = 7.34E+18s^-1

R = 8.3142 J/mole.K;  T = (273.15+°C)K

APPLICATIONS:

Polystyrene, especially expandable polystyrene, is made fire retardant by the use of halogen containing additives such as hexabromocyclododecane (HBCD). Initiators such as dicumene are commonly used as synergistic coagents to reduce the amount of HBCD required. Dicumene is well suited to this application as it has sufficient thermal stability at the temperatures used in suspension polymerization.

Specific data, on the synergistic effect of Dicumene can be supplied on request.