PEROXAN DC-40 P is used for the curing of unsaturated polyester resins at elevated temperatures.
PEROXAN DC-40 P is preferred for the curing of UP resin based hot press moulding formulations in the temperature range from 130° to 170°C. It is specially suitable for GMC; as a solid it ensures good homogenization in the compound.
The stability of this Dialkyl peroxide in an UP resin is hardly influenced by the presence of metal accelerators, pigments or fillers.
Depending on working conditions, the following peroxide dosage level is recommended:
PEROXAN DC-40 P: 2,0 to 4,0 phr
PEROXAN DC-40 P is recommended for the crosslinking of NBR, SBR, EP(D)M, LDPE and EVA. Rubber compounds containing PEROXAN DC-40 P combine good processing safety with a fair speed of cure.
Safe processing temperature (t2): 130°C
Typical crosslinking temperature (t90): 170°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.