SiSiB® PC7970 Propyltriacetoxysilane

SiSiB® PC7970

Propyltriacetoxysilane

SiSiB® PC7970 is a colourless to yellowish liquid, not miscible with water, decomposes with water and moisture under formation of acetic acid.

Technical Data

CAS No.	17865 07 5
EINECS No.:	241-816-9
Formula	C9H16O6Si
Molecular Weight	248.31
Boiling Point	236°C [760mmHg]
Flash Point	81°C

Color and Appearance	Colorless or yellowish clear liquid
Density 25/25°C	1.112
Refractive Index [20°C]	1.43
Active Content	98.00%

Application

SiSiB® PC7970 propyltriacetoxysilane, PTAS 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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Website : www.sinosil.com/

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