| Initiator (75% water in powder) for (co)polymerization of styrene, acrylonitrile, vinylacetate, methacrylates and acrylates. Developed for use in Expanded Polystyrene (EPS) polymerization. CAS number: 94-36-0 EINECS/ELINCS No.: 202-327-6 Applications: Perkadox L-W75 SF was developed for use in Expanded Polystyrene (EPS) polymerization. Perkadox L-W75 SF contains no surfactant which is typically used in dibenzoyl peroxide production. The surfactant in dibenzoyl peroxide lowers the average particle size of the EPS leading to inconsistent bead size and loss of yield due to too large or too small particle size. Since Perkadox L-W75 SF contains no surfactant, it has no effect of EPS particle size. In practice, combinations of two or more peroxides with different activities are used to reduce the residual monomer content in the final polymer and to increase reactor efficiency. During polymerization the temperature is increased in steps, thus providing the optimum temperature for the activity of each peroxide product. In the suspension polymerization of styrene Perkadox L-W75 SF is used at approximately 90°C. Typically, Perkadox L-W75 SF is used in combination with such initiators as tert-Butyl peroxybenzoate (Trigonox C) and tert-Butyl peroxy 2-ethylhexyl carbonate (Trigonox 117). Information provided by Nouryon |
