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HomeProduct name list2,3-Dimethyl-2,3-diphenylbutane

2,3-Dimethyl-2,3-diphenylbutane

  • CAS NO.:1889-67-4
  • Empirical Formula: C18H22
  • Molecular Weight: 238.37
  • MDL number: MFCD00053713
  • EINECS: 217-568-2
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-24 21:11:45
2,3-Dimethyl-2,3-diphenylbutane Structural

What is 2,3-Dimethyl-2,3-diphenylbutane?

Description

2,3-Dimethyl-2,3-diphenylbutane is one of the decomposition of Dicumylperoxide (DCP). Diallyl orthophthalate (DAOP) is a reactive plasticizer initiated by 2,3-dimethyl-2,3-diphenylbutane for improving polyphenylene oxide (PPO) processing.

Chemical properties

white to light yellow flakes, crystalline powder

The Uses of 2,3-Dimethyl-2,3-diphenylbutane

Dicumene is an environment friendly replacement for Antimony Tri-oxide (Sb2O3) and is commonly used as a flame retardant (FR) synergist for polypropylene and polystyrene, especially in expandable polystyrene (EPS).

The Uses of 2,3-Dimethyl-2,3-diphenylbutane

2,3-Dimethyl-2,3-diphenylbutane (DMDPB) is a new type of polymer material additive. It could used as a flame retardant synergist for polymer materials. This material can reduce the amount of flame retardant, reduce the effect of flame retardant on polymer performance, and endow polymer materials with flame retardant properties. It can also be used as a catalyst or initiator for polymer crosslinking, grafting, and copolymerization, and can be used for the modification of various polymer materials. For example, the thermolysis of 2,3-dimethyl-2,3-diphenylbutane at temperatures ranging from 220 to 310 °C is used to initiate the radical-mediated graft addition of vinyltriethoxysilane (VTEOS) to polyethylene[1].

Reactivity Profile

Adding appropriate modifiers dicumen can improve the performance of the polymer. In the case of heat or light, the product is easy to divide and form a certain free radical. The free radical is more stable due to the resonance of the benzene ring and the hyper-shock effect of methyl. In fact, the modification of Dicumene in the polymer is achieved through the free radical. It is found that when the temperature increases, the half-life of dicumen becomes shorter. The temperature of its decomposition is high. And at 230 degrees, the half-life will reach thirty minutes.

Flammability and Explosibility

Non flammable

References

[1] Parent J, et al. Mechanism and selectivity of 2,3-dimethyl-2,3-diphenylbutane mediated addition of vinyltriethoxysilane to polyethylene. European Polymer Journal, 2006; 42: 971-980.

Properties of 2,3-Dimethyl-2,3-diphenylbutane

Melting point: 90-110 °C
Boiling point: 335.97°C (estimate)
Density  0.9859 (estimate)
vapor pressure  0.015Pa at 20℃
refractive index  1.5413 (estimate)
storage temp.  Sealed in dry,2-8°C
form  Flakes, Crystalline Powder or Chunks
color  White to light yellow
Water Solubility  insoluble
InChI InChI=1S/C18H22/c1-17(2,15-11-7-5-8-12-15)18(3,4)16-13-9-6-10-14-16/h5-14H,1-4H3
NIST Chemistry Reference Benzene, 1,1'-(1,1,2,2-tetramethyl-1,2-ethanediyl)bis-(1889-67-4)
EPA Substance Registry System 2,3-Dimethyl-2,3-diphenylbutane (1889-67-4)

Safety information for 2,3-Dimethyl-2,3-diphenylbutane

Signal word Warning
Pictogram(s)
ghs
Flame
Flammables
GHS02
GHS Hazard Statements H226:Flammable liquids
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233:Keep container tightly closed.
P240:Ground/bond container and receiving equipment.
P241:Use explosion-proof electrical/ventilating/lighting/…/equipment.
P242:Use only non-sparking tools.
P243:Take precautionary measures against static discharge.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P370+P378:In case of fire: Use … for extinction.
P403+P235:Store in a well-ventilated place. Keep cool.

Computed Descriptors for 2,3-Dimethyl-2,3-diphenylbutane

InChIKey HGTUJZTUQFXBIH-UHFFFAOYSA-N
SMILES C(C1=CC=CC=C1)(C)(C)C(C1=CC=CC=C1)(C)C

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