United Initiators DTBP Di(tert.butyl)peroxide 110-05-4

Overview of the document:

• Product name: DTBP (tert-butyl peroxide)
• CAS No.: 110-05-4
• Molar mass: 146.2 g/mol
• Physical state: liquid, technically pure
• Applications: Initiator (free radical source) for monomer polymerization, rheology control of cross-linked polyethylene and polypropylene.

Technical data:

• Appearance: colorless liquid
• Purity: >99%
• Active oxygen content: more than 10.8%
• Density at 20°C: approx. 0.79 g/cm3
• Viscosity at 20°C: approx. 0.8 mPa-s
• Refractive index at 20°C: approx. 1.389
• Solubility: insoluble in water, soluble in organic solvents
• Vapor pressure at different temperatures: 25/75/1000 mbar at 20/40/110°C respectively
• Critical temperature (SADT): above 80°C
• Refrigeration stability: liquid remains stable below -25°C
• Recommended storage temperature: below 40°C
• Storage stability: 12 months stable from date of delivery

Applications:

1. Polymer crosslinking:
   • For cross-linking polyethylene (HDPE and LDPE) at temperatures greater than 180°C.
   • Effective and relatively burn-in free.
   • Dosage: 0.5-2% mass ratio according to the material to be cross-linked.
   • Volatile, odorless decomposition product.
   • No sulfide surface odor.
2. Polypropylene rheology control:
   • Used as a source of free radicals to control the rheology of polypropylene.
   • Temperature range: 200°C - 220°C.
   • Dosage: Based on 0.01% - 0.1% mass ratio of polymer.
   • The lowering of molecular weight averages makes polypropylene easier to reprocess.

Standard Packaging:

• DTBP is supplied in 20 kg (44.1 lb) polyethylene tanks.

Disclaimer:

• Information is based on in-house testing using local raw materials and is designed to understand products and applications.
• There is no warranty of fitness for a particular product nature or for a particular application.
• The application and use of technical advice based on what is provided is the sole responsibility of the user.
• Users are encouraged to inspect and test incoming goods to verify their suitability for the intended application.