Bis(tert-butyl isopropyl peroxide)benzene (DPIB) 25155-25-3

Di(tert-butylperoxyisopropyl)benzene
Trade Name: Initiator DPIB
English Name: Di(tert-butylperoxyisopropyl)benzene
Chemical Name: Di(tert-butylperoxyisopropyl)benzene
Molecular Formula: C20 H34 O4
Molecular Weight: 338.5
Theoretical Active Oxygen Content: 9.45%
CAS Number: 25155-25-3
UN No.: 3106
EINECS: 218-664-7
Marine Transport (IMDG): 5.2, Class 2 Packaging, Category D Solid Peroxides.
Major decomposition products: tert-butanol, dihydroxydiiisopropylbenzene, diacetylbenzene, acetyl-2-hydroxyisopropylbenzene, methane, acetone, etc.
Safety data:
0.1 hour: 156°C
1 hour: 134°C
10 hours: 115°C
Thermal Stability Data:
Self-Accelerating Decomposition Temperature (SADT): 80°C
Critical Temperature (Tem): 75°C
Storage Temperature (Tsmax): --/15 °C
Activation Energy E (kJ/mol): 152.69
Technical Specifications:
Appearance: White solid powder or flake-like solid
Purity: 96% min
Applications:
1. An excellent degradant for polypropylene: It can be used to produce rheological polypropylene with low molecular weight, a narrow molecular weight distribution, and a high melt flow index; it is a very important initiator for controlled-rheology polypropylene.
2. It serves as an initiator for styrene polymerization. This product is an initiator for bulk polymerization of styrene; it is characterized by a higher molecular weight of the resulting PS compared to that produced by thermal polymerization, as well as a high polymerization conversion rate.
3. It is the most common rubber vulcanizing agent: This product offers excellent scorch resistance. It is typically diluted with silicone oil, other neutral solvents, or neutral fillers. The safe processing temperature is 135°C, and the cross-linking temperature is
175°C.
Packaging and Transportation:
Our factory’s standard packaging is 20-kilogram corrugated cardboard boxes; however, we can also supply packaging in sizes specified by the customer upon request at the time of ordering.
Storage Precautions:
1. Store in a cool, well-ventilated area at a temperature not exceeding 15°C.
2. Keep away from sources of ignition and heat. Store separately from acids, reducing agents, flammable substances, combustible materials, and other reducing agents.
3. Lighting and ventilation facilities in the storage area must be explosion-proof, with switches located outdoors.
4. Handle with care to prevent damage to packaging and containers. Avoid impacts and vibrations. Wear appropriate personal protective equipment during repackaging and handling operations.
5. Customers are advised to carefully read our factory’s “Material Safety Data Sheet (MSDS)” when storing, transporting, and using this product.
Product Shelf Life:
When stored and transported in strict accordance with the manufacturer’s instructions, product quality is guaranteed for six months.
Fire Safety:
1. This product may decompose violently when exposed to heat, causing a sudden fire. Small fires involving a small amount of the product should be extinguished immediately using a foam or dry powder fire extinguisher.
2. In the event of a large fire, evacuate immediately to a safe distance and use a water hose to suppress the flames; notify the fire department for further handling.