VANABIO® AS1796
VANABIO® AS1796

Vinyltriacetoxysilane

VANABIO® AS1796 is a clear to yellowish liquid with acrid odor of acetic acid (vinegar). It hydrolyzes in the presence of moisture (acetic acid is released) to form silanols, which can react with themselves to pro-duce siloxanes or bind to inorganic substrates.


VANABIO® AS1796 is the equivalent of Dow's Z-6075, Wacker's GENIOSIL GF 62.

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Technical Data


CAS No.

4130-08-9

EINECS No.:

223-943-1

Formula

C8H12O6Si

Molecular Weight

232.26

Boiling Point

112°C [760mmHg]

Flash Point

88°C



Color and Appearance

Colorless or yellowish clear liquid

Density 25/25°C

1.167

Refractive Index [20°C]

1.423 [25°C]

Active Content

95.0%


Application


  • VANABIO®AS1796 vinyltriacetoxysilane, VTAS silane, is used as a raw material (crosslinker) for acetoxy crosslinking RTV-1 sealants.


  • Acetoxy silanes are more reactive than alkoxy silanes. Acetoxy silanes are frequently used as one-component mixtures to make RTV-1 silicone sealants. These mixtures have an excess of multi-functional acetoxy silane added to silanol-terminated PDMS, which results in a PDMS chain with acetoxy groups at the ends.


    When this compound is exposed to moisture some acetoxy groups are hydrolyzed and self-condense or react with other acetoxy and rapid crosslinking takes place. Acetic acid formation is one of the driving forces of this reaction.

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