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Crosslinking of silicone rubbers

Oct 30, 2015

Product Name: Crosslinking of silicone rubbers. 
Other Names: curing agent, curing ingredient,vulcanizing agent,vulcanizater  
crosslinking agent, cross linking agent, bridging agent accelerant, accelerating agent, accelerator, cure accelerator for silicone rubber
Item NO.: Silibase-45S
Equivalent Product: Trigonox® 101-45S-ps 

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.

Appearance :      White high viscous paste 
Assay :                 44.0-46.0%

Density, 20°C :     0.940 g/cm³

Major decomposition products:
Methane, Ethane, Acetone, tert-Butanol, tert-Amylalcohol 

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.

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