Vinyltrimethoxysilane - Materials / Alfa Chemistry

NAVIGATION

Vinyltrimethoxysilane

PRICE INQUIRY

Catalog Number

ACMA00017249

Product Name

Vinyltrimethoxysilane

Category

Polymers

Synonyms

Ethenyltrimethoxysilan; Trimethoxy(Vinyl)Silane; Vinymethyltrimethoxysilane; Ethenyltrimethoxysilane; Vtmo; Silane Coupling Agent A-171; Vinyl Trimethoxy Silane;Cv-4917; Dynasylan Vtmo; Ethenyltrimethoxy-Silane; Kbm1003

Description

It is used to modify polyethylene and other polymers by grafting its vinyl groups onto the polymer backbone using free radical initiators such as peroxides. This provides polymers with pendant trimethoxysilyl groups that can be used as moisture-activated crosslinking sites by hydrolysis of alkoxy groups and then condensation of the resulting silanol. When the silane-grafted polyethylene reacts to form a cross-linked or vulcanized polyethylene, cross-linked bonds are formed with water. This technology is widely used worldwide in commercial applications for wire and cable insulation, pipes and other similar purposes. The basic reaction sequence is as follows: using a peroxide initiator, reacting (grafting) polyethylene with vinyltrimethoxysilane in an extruder. The grafted polyethylene is then formed into final products, such as cable jackets, wire insulation or pipes. The forming step is usually completed by a second extrusion, during which the catalyst for the moisture curing step is added. Finally, due to the hydrolysis and condensation of the silane, the formed article is exposed to moisture or hot water, and the condensation forms a crosslink through the formation of Si-O-Si bonds.

IUPAC Name

ethenyl(trimethoxy)silane

Molecular Weight

148.23 g/mol

Molecular Formula

C5H12O3Si

Canonical SMILES

CO[Si](C=C)(OC)OC

InChI

InChI=1S/C5H12O3Si/c1-5-9(6-2,7-3)8-4/h5H,1H2,2-4H3

InChI Key

NKSJNEHGWDZZQF-UHFFFAOYSA-N

Boiling Point

123 °C

Melting Point

<-70 °C

Flash Point

22 °C

Purity

0.98

Density

0.9718 g/mL

Appearance

Colorless clear liquid

Application

Vinyltrimethoxysilane (VTMS) is a versatile silane coupling agent that can be used to provide superhydrophobicity to various materials such as TiO2, talc, kaolin, magnesium oxide nanoparticles, ammonium phosphate and PEDOT. By modifying the surface and creating a protective water-resistant layer, VTMS is ideal for use in major coating industries to enhance wettability and improve superhydrophobic characteristics of composites.

Storage

Complete packing, ventilated, away from open fire.

Complexity

81.9

Covalently-Bonded Unit Count

EC Number

220-449-8

Exact Mass

148.055571g/mol

Formal Charge

Hazard Statements

H225; H332