Due to its high volatility, PEROXAN DB requires precautions in handling and metering.
Polymerization of ethylene:
PEROXAN DB is used for high pressure polymerization of ethylene in both autoclave and tubular processes, usually in combination with other peroxides of varying degrees of activity.
Temperature range: 240 to 280°C
Light-off temperature at 2300 bar: 265°C
Polymerization of styrene:
PEROXAN DB may be used in polymerization and copolymarization of styrene. In a mass process PEROXAN DB can be used to increase polymerization rates.
Temperature range: 95 to 185°C
Dosing: 0,02 to 0,1 phr
Polymerization of acrylates and methacrylates:
PEROXAN DB can be used as initiator for the solution, bulk and suspension (co)polymerization of acrylates and methacrylates.
Temperature range (solution polym.): 130 to 175°C
Dosing: 0,05 to 0,1 phr
Controlled rheology polypropylene (CR-PP) in an extrusion process:
PEROXAN DB allows great flexibility in controlling the melt flow index (MFI) of polypropylene. Small changes in either peroxide concentration or process temperature can produce significantly different MFIs. The MFI increases with the peroxide level.
Temperature range: 200 to 220°C
Dosing: 0,01 to 0,1 phr
PEROXAN DB is used for the curing of unsaturated polyester resins at elevated temperatures, in the temperature range from 120° to 160°C. Due to its high volatility, PEROXAN DB requires strict precautions in handling and metering.
Furthermore, PEROXAN DB is used in polymerization of alkyde styrene resins.
Depending on working conditions, the following peroxide dosage level is recommended:
PEROXAN DB: 1,0 to 1,5 phr
Due to ist high volatility, PEROXAN DB is mainly used for compounds that are crosslinked immediately after mixing.
PEROXAN DB is a thermally very stable peroxide. However, the high vapor pressure and the low flashpoint require special attention during handling and use. PEROXAN DB tends to build up static electricity; pumps must be ignition proof with grounded stainless steel tubing. Avoid any exposure to heat from naked fire, sunlight, steam pipes or any other source during storage.
Safe processing temperature (t2): 145°C
Typical crosslinking temperature (t90): 180°C
The safe processing temperature t2 is defined as the temperature, at which the scorch time is longer than 20 minutes. The typical crosslinking temperature t90 is defined as the temperature at which 90% of the crosslinks in the compound are formed within about 12 minutes.