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Methyltriacetoxysilane

Catalog Number ACM4253343-2
Product Name Methyltriacetoxysilane
CAS 4253-34-3
Structure
Description Generally, methyltriacetoxysilane is used as a crosslinking agent in a ratio of 3% to 5%. It can also be used alone or in combination with other acetoxysilanes to provide a sealant with targeted properties (such as required curing speed, adhesion, etc.).
Synonyms Methylsilanetriyl Triacetate; Triacetoxy(Methyl)Silane
Molecular Weight 220.25 g/mol
Molecular Formula C7H12O6Si
Boiling Point 87 °C
Melting Point 40-45 °C(lit.)
Flash Point 85 °C
Purity 0.95
Density 1.4050±0.0050 g/mL
Appearance Colorless transparent liquid
Application Methyltriacetoxysilane are more reactive than alkoxysilanes. Methyltriacetoxysilane 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.
Storage Be airtight in a cool and dry environment.
MSDS Download MSDS
COA Download COA
SpecSheet Download Spec Sheet

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