Silane | Silanes | Alkyl & Alkoxy Silanes | Alkoxy Silane Crosslinkers

SiSiB® PC5132

Synonym: MTES

Countertype of Dynasylan MTES, DowCorning Z-6383, Z-6370, ShinEtsu KBE-13, Wacker M1-TRIETHOXY, Silquest A-162

Chemical Structure


SiSiB® PC5132 is an alkylalkoxysilane. It is a clear, colorless liquid with an odor characteristic of alcohols. SiSiB® PC5132 hydrolyze slowly in the presence of moisture to form reactive silanols. These react further to produce oligosiloxanes and then polysiloxanes.

Typical Physical Properties

Chemical Name: Methyltriethoxysilane
CAS No.: 2031-67-6
EINECS No.: 217-983-9
Empirical Formula: C7H18O3Si
Molecular Weight: 178.3
Boiling Point: 142°C [760mmHg]
Flash Point: 30°C
Color and Appearance: Colorless clear liquid
Density [25°C]: 0.895
Refractive Index [25°C]: 1.3832 [25°C]
Purity: 99.5% by GC


SiSiB® PC5132 is highly miscible with standard organic solvents, such as alcohols, hydrocarbons and acetone.

SiSiB® PC5132 is practically insoluble in neutral water and reacts only slowly to form silanols and higher condensation products. Addition of a hydrolytic catalyst (inorganic/organic acids, ammonia or amines) accelerates the hydrolysis of SiSiB® PC5132 substantially.

SiSiB® PC5132 may be used as water repellent to improve fillers dispersibility and reduces their sedimentation tendency.

SiSiB® PC5132 may be used as an important component for sol-gel coating, silicone resins and silicone rubber.

[Alkoxy Crosslinkers] The most common alkoxy crosslinkers are methoxy or ethoxy silanes due to their high reactivity. The reaction precedes by nucleophilic substitution usually in the presence of acid or base catalysts. Alkoxides react directly with silanols or with water to produce silanols. The newly formed silanols can react with other alkoxides or self-condense to produce a siloxane bond and water. When an acid catalyst is used, protonation of the alkoxysilane increases the reactivity of the leaving group. When a base catalyst is used, deprotonation of the silanol forms a reactive silonate anion. The by-product of the reaction is an alcohol. Common metal catalysts for these reactions are alkoxytitanium derivatives and dibutyltin dicarboxylates.


Net weight 190Kg steel drum, for more details, please visit Packing Centre.

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