Copolymerization of styrene/butadiene (SBR rubber) and acryl nitrile/ butadiene/styrene (ABS rubber):
The emulsion polymerization can be initiated through a redox mechanism at low temperatures. Suitable reducing agents are Fe-salts, sulphites, dithionites, etc.
Temperature range: 5 to 20°C
Dosing: 0,1 to 0,3 phr
Polymerization of (meth-)acrylates and acrylic resins dispersions:
The emulsion polymerization can be initiated through a redox mechanism at low temperatures. Suitable reducing agents are Fe-salts, sulphites, dithionites, ascorbinic acid or sugar, etc.
Temperature range: 50 to 80°C
Dosing: 0,1 to 0,5 phr
PEROXAN CU-80 L is used for the curing of unsaturated polyester resins.
Without the addition of an accelerator the polymerization starts only above the activation temperature of 90°C. For the cure at lower temperature PEROXAN CU-80 L must be accelerated by cobalt or vanadium. Together with Cobalt accelerators the gel time at room temperature is very long and is therefore particularly suitable for those applications where a long production time is required, for instance in the production of large parts and in filament winding. Sufficiently fast gel an cure times are only obtained above 35°C.
Together with vanadium accelerators PEROXAN CU-80 L gives a short gel time and a fast cure at room temperature. This can be improved further by adding a special promotor like pyruvic acid.
With such a system it is possible to get a fast cure of UP resins, even at low temperature. Also for resins like vinylester resin, these combinations are very suitable.
Depending on working conditions, the following peroxide and accelerator dosage levels are recommended:
PEROXAN CU-80 L: 1,0 to 3,0 phr
PERGAQUICK C12 X (Cobalt, 1%): 0,5 to 3,0 phr