The full name of the dicumene name is 2,3-dimethyl-2,3-diphenylbutane. Due to the structural specificity, the C-C bond between the corresponding quaternary carbon atoms is not stable and easily dissociates. Free radicals. It is mainly used as a flame retardant synergist and a cross-linking copolymerization catalyst. Compared with general free radical initiators such as peroxides and azo compounds, it has high stability and is safe to use.
The amount of dicumenes does not have a great effect on the tensile strength of the system. When the added amount reaches 1.2 parts, it can have good flame retardant properties. Taking into account the tensile properties and flame retardant properties, and taking into account the cost factor, it can be determined that the appropriate amount of the dicumene in the system is 1.2 parts.
As a synergistic agent for fire retardant and flame retardant of polyolefin plastics, the dicumene use of bismuth trioxide in bromine-based flame retardant system can increase the flame retardant effect and increase the physical and mechanical properties of plastics while reducing the amount of flame retardant. A graft catalyst for polystyrene and polypropylene. Used in polymer crosslinking initiators.
Typical applications are the addition of 1.6% iodobenzene and 0.2% sb2o3 to polypropylene, and the addition of 0.2% hydrazine to a product oxygen index of 25.5; if not added, the oxygen index is 19.5. Further, if polystyrene is added with 0.3%-0.5% organic bromide, 0.3% of the hydrazine is added, and the product flame extinguishing time is "3 seconds; if not added, it is completely burned.