Crosslinking of silicone rubbers Silibase-45S

Product description 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane, paste 45% in silicone oil Molecular weight : 290.4 Active oxygen content peroxide : 11.02% actual product : 4.84-5.06% CAS No. : 78-63-7 EINECS/ELINCS No. : 201-128-1 TSCA status : listed on inventory Silibase-45S is a bifunctional peroxide formulation which is mainly used for the crosslinking of silicone rubbers. Specifications Appearance : White high viscous paste Assay : 44.0-46.0% Characteristics Density, 20°C : 0.940 g/cm³ Major decomposition products Methane, Ethane, Acetone, tert-Butanol, tert-Amylalcohol Applications Silibase-45S is mainly used for the crosslinking of silicone rubbers. • Rubber compounds containing Silibase-45S have excellent scorch safety. • Safe processing temperature: 135°C (rheometer ts2 > 20 minutes). • Typical crosslinking temperature: 175°C (rheometer t90 about 12 minutes). Thermal stability Organic peroxides are thermally unstable substances, which may undergo self-accelerating decomposition. The lowest temperature at which self-accelerating decomposition of a substance in the original packaging may occur is the Self-Accelerating Decomposition Temperature (SADT). The SADT is determined on the basis of the Heat Accumulation Storage Test. For Silibase-45S SADT : 80°C (176°F) The Heat Accumulation Storage Test is a recognized test method for the determination of the SADT of organic peroxides.