Polymerization of ethylene:
PEROXAN PB 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: 220 to 270°C
Light-off temperature at 2300 bar: 225°C
Polymerization of styrene:
PEROXAN PB may be used in polymerization and copolymarization of styrene.
In a mass process PEROXAN PB can be used to increase polymerization rates.
In suspension polymerization processes, PEROXAN PB is often used for reduction of residual styrene content during the final polymerization stage.
Temperature range: 100 to 140°C
Dosing: 0,02 to 0,1 phr
Polymerization of acrylates and methacrylates:
PEROXAN PB can be used as initiator for the solution, bulk and suspension (co)polymerization of acrylates and methacrylates.
Temperature range: 90 to 130°C
Dosing: 0,1 to 1 phr
PEROXAN PB may also be used for the (co)polymerization of acrylonitrile and vinyl acetate.
PEROXAN PB is used for the curing of unsaturated polyester resins at high temperatures.
PEROXAN PB is preferred for the curing of UP resin based hot press moulding formulations in the temperature range from 140° to 160°C.
PEROXAN PB is often times used in combination with a high reactive peroxide like PEROXAN BCC or PEROXAN MI-60 K as kicker in in formulations for pultrusion processes in the temperature range of 100° to 140°C.
In combination with a cobalt accelerator e.g. PERGAQUICK C100 (10% cobalt), PEROXAN PB is applicable for the cure of UP resins in the temperature range of 70°C and higher.
Depending on application and working conditions, the following peroxide and when applicable cobalt accelerator dosage levels are recommended:
PEROXAN PB: 1,0 to 2,0 phr
PERGAQUICK C100: 0,1 to 0,6 phr
PEROXAN PB is recommended for the crosslinking of NBR, SBR, EP(D)M, LDPE and EVA.
Rubber compounds containing PEROXAN PB have moderate processing safety in combination with a very high speed of cure.
Safe processing temperature (t2): 100°C
Typical crosslinking temperature (t90): 140°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.