Product introduction
The name of DMDPB is 2,3- two methyl -2,3- two phenyl butane. Due to the particularity of its structure, the C C bond between the corresponding quaternary carbon atoms is not stable enough to dissociate and form free radicals. A free radical initiator with an unstable C - C bond is used as a free radical initiator, which is mainly used as a flame retardant and a crosslinking copolymerization catalyst. Compared with the general free radical initiators such as peroxide and azo compound, the stability is high and the use is safe.
The effect of the amount of DMDPB added on the tensile strength of the system is not very large. When the addition amount reaches 1.2, it can have good flame retardancy. Considering both tensile and flame retardancy and cost factors, the appropriate amount of DMDPB in the system can be determined from 1 to 2 copies. DMDPB has remarkable flame retardancy and synergistic effect. In the LDPE/Sb203/DBD- P0 (mass ratio) =100/5/3 system, adding 1 DMDPB can greatly improve the elongation at break, and at the same time, improve the flame retardancy and the oxygen index is 29.


purpose
As a synergistic synergistic agent for fire retardancy and flame retardance of polyolefin plastics, bromine flame retardant system can replace three oxidation and two antimony, increase the flame retardance effect, reduce the amount of flame retardants, and increase the physical and mechanical properties of plastics. For the polystyrene, polypropylene grafted catalyst. Used for polymer crosslinking initiators.


Basic information
CAS 1889-67-4
Molecular C18H22
Molecular weight 238
structure
Physical property index
Serial number parameter specification
1 appearance of colorless or yellowish pink crystal
2 melting point 115-120 centigrade
3 component 99% (min)


Typical application
Such as adding 1.6% polypropylene iodobenzene and 0.2%sb2o3 in Bicumyl with 0.2% products, oxygen index is 25.5; if not Bicumyl, oxygen index is 19.5. As polystyrene is added to the 0.3%-0.5% organic bromide, plus 0.3% of the blight, the product flame is extinguished for 3 seconds, if not completely burning.
In the formulation of HIPS, the combined use of three two and 50% antimony is completely replaced. When the same flame retardant effect is achieved, the consumption of brominated flame retardants in the formula is 50% lower than that in the original, while the amount of combined itself is three 40%.


Place of Origin
Korea ATOZ chemistry.