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Divinyltetramethyldisiloxane CAS No.2627-95-4
Tetramethyldivinyldisiloxane .
Synonym: Divinyltetramethyldisiloxane
1,1,3,3-Tetramethyl-1,3-divinyldisiloxane
Typical Physical Properties
Chemical Name: | Tetramethyldivinyldisiloxane VMM, ViMM |
CAS No.: | 2627-95-4 |
EINECS No.: | 220-099-6 |
Empirical Formula: | C 8 H 18 OSi 2 |
Molecular Weight: | 186.40 |
Boiling Point: | 139°C [760mmHg] |
Flash Point: | 19°C |
Color and Appearance: | Colorless or yellowish transparent liquid |
Density [25°C]: | 0.811 |
Refractive Index [25°C]: | 1.412[25°C] |
Purity: | 99.0%min & 99.5%min
|
Applications
It 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 Silicone RTVs.
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 with 100 parts of the Base polymer containing the platinum catalyst.
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