Butanox® M-50A is a methyl ethyl ketone peroxide without phthalate plasticizers, with moderate reactivity and low moisture content. Used in conjunction with cobalt
promoter for curing unsaturated polyester resin at room temperature or elevated temperature

| Appearance, 20-25 °C | Transparent liquid |
| Total reactive oxygen species | 8.8-9.0 % |
| Density, 20 °C | 1.0 g/cm³ |
Butanox® M-50A is a versatile methyl ethyl ketone peroxide used for the curing of unsaturated polyester resin at room temperature along with a cobalt accelerator. It can also be used for thermal curing of unsaturated polyester resin under conditions of 100-127 ° C.Butanox ® M-50A has a high content of methyl ethyl ketone peroxide monomer, which provides the resin with a short gel time.
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