SiSiB¬ PC9401

Tetramethyldivinyldisiloxane
SiSiB¬ PC9401 is a high purity 1,3-Divinyl Tetramethyl Disiloxane, it is a colorless to yellowish clear liquid.

Technical Data
CAS No. 2627 95 4
EINECS No. 220-099-6
Formula C8H18OSi2
Molecular Weight 186.40
Boiling Point 139®C [760mmHg]
Flash Point 24®C

Color and Appearance Colorless transparent liquid
Density 25/25®C 0.818
Refractive Index 1.412 [20®C]
Min.Purity 99%

Application
SiSiB¬ PC9401 is primarily used as an end-capper in the production of vinyl end-capped siloxane polymers. The vinyl end-capped silicone polymers can be used in a wide variety of end use applications such as silicone rubber, sealants, coatings and cosmetics.
SiSiB¬ PC9401 is used as a linear inhibitor in the formulating of two-part Silicone RTV-2 Addition Curing systems.
Because of the large vinyl content, small amounts are very effective in retarding and controlling the working time or pot life of two-part Addition-Curing RTV rubber silicones.
Also, due to its boiling point of 139ºC, it is easily volatilized during curing. A suggested starting formulation is to use 0.25 to 0.50 parts by weight of SiSiB¬ PC9401 with 100 parts of the Base polymer containing the platinum catalyst.

Packing and Storage
SiSiB¬ PC9401 linear siloxane is supplied in 160Kg steel drum.
In the unopened original container SiSiB¬ PC9401 has a shelf life of one year in a dry and cool place.

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