United Initiators DTBP S-500 Di(tert.butyl)peroxide 110-05-4

Product Information:

• Product Name: DTBP S-500
• Chemical composition: Di-tert-butyl peroxide
• CAS No.: 110-05-4
• Physical state: liquid, technically pure
• Appearance: colorless liquid
• Molecular weight: 146.2 g/mol
• Structural formula: [CH3C(CH3)OC(CH3)2]2O

Technical data:

• Purity: > 99%
• Active oxygen content (theoretical value): > 10.8%
• Density (20°C): approx. 0.79 g/cm³
• Viscosity (20°C): approx. 0.8 mPa-s
• Refractive index (20°C): approx. 1.389
• Vapor pressure (20/40/110°C): 25/75/1000 mbar
• Critical temperature (SADT): above 80°C
• Storage stability: 12 months from date of delivery

Areas of application:

1. Polyethylene crosslinking:
   • Used as peroxide crosslinking agent, suitable for crosslinking of polyethylene (HDPE and LDPE), crosslinking temperature: 180°C or more.
   • Use level: 0.5-2% (according to the mass ratio of the material supplied).
   • Characteristics: Very efficient, almost no premature cross-linking (scorching).
   • The product is highly volatile and a closed system is recommended for mixing and diffusion with polyethylene powders.
2. Control of polypropylene rheology:
   • Rheology control agent for polypropylene in the temperature range of 200°C - 220°C.
   • Use level: 0.011 TP3T - 0.11 TP3T (proportional to polymer mass).
   • This degradation (e.g., in an extruder) reduces the molecular weight of the polypropylene, making it easier to (re)process.
3. Electrical properties:
   • The new version of the DTBP S-500 is electrically conductive, significantly reducing the risk of electrostatic discharge.

Packaging:

• Standard Packaging: 20 kg (44.1 lb) polyethylene drums

Disclaimer:

• The information and technical advice provided is based on in-house testing of local raw materials and is intended to introduce products and applications.
• Information should not be construed as a warranty of the specific properties of the product described or of its suitability for a particular application.
• The information does not contain warranties of a product or shelf life nature, nor does it assume any legal liability.
• It is the responsibility of the user to perform careful inspection and testing of incoming goods to verify their suitability for the intended application.