Crosslinking Agent for Rubber Silibase-1440B

Product description Di(tert-butylperoxyisopropyl)benzene, powder 40% with calcium carbonate and silica Molecular weight: 338.5 Active oxygen content peroxide: 9.45% actual product : 3.7-3.9% CAS No. : 25155-25-3 EINECS/ELINCS No. : 246-678-3 TSCA status : listed on inventory Silibase-1440B is a bifunctional peroxide formulation which is used for the crosslinking of natural and synthetic rubbers, as well as thermoplastic polyolefins. Specifications Appearance : Off-white powder Assay : 39.0-41.0% Characteristics Density, 20¡ãC : 1.65 g/cm³ Bulk density, 20¡ãC : 470 kg/m³ Applications Silibase-1440B is used for the crosslinking of natural and synthetic rubbers, as well as thermoplastic polyolefins. • Rubber compounds containing Silibase-1440B have excellent scorch safety, under certain conditions one step mixing is possible. • Safe processing temperature: 135°C (rheometer ts2 > 20 minutes). • Typical crosslinking temperature: 175¡ãC (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-1440B SADT : 80°C The Heat Accumulation Storage Test is a recognized test method for the determination of the SADT of organic peroxides (see Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria - United Nations, New York and Geneva). Major decomposition products Methane, Acetone, tert-Butanol, Di(2-hydroxyisopropyl)benzene, Diacetylbenzene, Acetyl 2-hydroxyisopropyl benzene