Silane Crosslinkers | Acetoxy Silanes | Adhesion Promoters
 

SiSiB® PC7910

Di-tertbutoxy-diacetoxysilane (DBAC).
Synonym: Diacetoxy di-tertbutoxy silane


Chemical Structure


Introduction

SiSiB® PC7310 is a clear and almost colorless fluid with a typical smell (MEKO). It readily hydrolyzes upon contact with moisture.


Typical Physical Properties

Chemical Name:
Di-tertbutoxy-diacetoxysilane
CAS No.:
13170-23-5
EINECS No.:
236-112-3
Formula:
C12H24O6Si
Molecular Weight:
292.40
Boiling Point:
102°C [5mmHg] 277°C [760mmHg]
Flash Point:
95°C
 
Color and Appearance:
Colorless or yellowish transparent liquid
Density [25°C]:
1.020
Refractive Index [25°C]:
1.4040 [25°C]
Purity:
97% by GC

Applications

SiSiB® PC7910 is used as a raw material for acetoxy crosslinking RTV-1 sealants.

Acetoxy silanes are more reactive than alkoxysilanes. 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.


Packings


Net weight 210L steel drum or 1000L IBC container, for more details, please visit Packing Centre.

Technical Library


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