ChemicalBook Product Catalog Chemical Reagents Organic reagents Silane Vinyltrimethoxysilane

Vinyltrimethoxysilane

Product NameVinyltrimethoxysilane
CAS2768-02-7
MFC5H12O3Si
MW148.23
EINECS220-449-8
MOL File2768-02-7.mol

Chemical Properties

Melting point	<-70°C
Boiling point	123 °C (lit.)
Density	0.968 g/mL at 25 °C (lit.)
vapor pressure	88 hPa (55 °C)
refractive index	n20/D 1.392(lit.)
Flash point	73 °F
storage temp.	Store below +30°C.
form	liquid
Specific Gravity	0.970
color	Colorless to Almost colorless
Odor	Fruity odor
explosive limit	1.1%(V)
Water Solubility	slightly soluble
Sensitive	Moisture Sensitive
Hydrolytic Sensitivity	7: reacts slowly with moisture/water
BRN	1099136
InChI	1S/C5H12O3Si/c1-5-9(6-2,7-3)8-4/h5H,1H2,2-4H3
InChIKey	NKSJNEHGWDZZQF-UHFFFAOYSA-N
SMILES	CO[Si](OC)(OC)C=C
LogP	-2--0.82 at 20℃
CAS DataBase Reference	2768-02-7(CAS DataBase Reference)
NIST Chemistry Reference	Vinyltrimethoxysilane(2768-02-7)
EPA Substance Registry System	Vinyltrimethoxysilane (2768-02-7)

Safety Information

Hazard Codes	Xi
Risk Statements	10-36/37/38-20
Safety Statements	26-36/37/39-37/39-16
RIDADR	UN 1993 3/PG 2
WGK Germany	1
RTECS	VV6770000
F	10-21
Autoignition Temperature	235 °C
TSCA	TSCA listed
HazardClass	3
PackingGroup	III
HS Code	29310095
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 4 Inhalation Flam. Liq. 2 Skin Sens. 1B
Toxicity	LD50 orally in Rabbit: 7120 mg/kg LD50 dermal Rabbit 3259 mg/kg

MSDS

Provider	Language
Ethenyltrimethoxysilan	English
SigmaAldrich	English
ACROS	English
ALFA	English

Usage And Synthesis

Description

Vinyltrimethoxysilane, is used as a polymer modifier via grafting reactions. The resulting pendant trimethoxysilyl groups can function as moisture-activated crosslinking sites. The Silane grafted polymer is processed as a thermoplastic and crosslinking occurs after fabrication of the finished article upon exposure to moisture.

Vinyltrimethoxysilane is mainly applied in these aspects:

In the preparation of moisture-curing polymers, e.g. polyethylene. Silane crosslinked polyethylene is widely used as cable isolation, and sheathing mainly in low voltage applications as well as for hot water/sanitary pipes and underfloor heating.
As a co-monomer for the preparation of different polymers such as polyethylene or acrylics. Those polymers show an improved adhesion to inorganic surfaces and they can also be crosslinked with moisture.
As an efficient adhesion promoter for various mineral-filled polymers, improving mechanical and electrical properties especially after exposure to moisture.
Improving the compatibility of fillers with polymers, leading to a better dispersibility, reduced melt viscosity and easier processing of filled plastics.
Pre-treating of glass, metals, or ceramic surfaces, improve the adhesion of coatings on these surfaces and corrosion resistance.
As moisture scavenger, it reacts rapidly with water. This effect is used widely in sealants.

Chemical Properties

Colorless transparent liquid

Uses

VTMS may be used to provide superhydrophobicity to different materials like TiO₂, talc, kaolin, magnesium oxide nanoparticles, ammonium phosphate and PEDOT. It modifies the surface by capping the material and creates a protective layer that is water resistant and can be used in major coating industries.

General Description

Vinyltrimethoxysilane (VTMS) is a silane coupling agent with silicon and hydroxyl groups that can be used to enhance the wettability and improve the superhydrophobic characteristics of different composites.

Flammability and Explosibility

Flammable

Toxics Screening Level

The initial threshold screening level (ITSL) for vinyltrimethoxysilane is 10 μg/m3 based on an annual averaging time.