Vinyltrimethoxysilane CAS:2768-02-7 98%min CAS NO.2768-02-7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The EquivalentProducts to other Manufacturers

GE	Dowcorning	ShinEtsu	Degussa	Chisso
A-171	Z-6300	KBM-1003	VTMO	S21O

TypicalPhysical Properties

Chemical Name	Vinyltrimethoxysilane
CAS No.	2768-02-7
EINECS No.	220-449-8
Formula	C5H12O3Si
Appearance	Colorless transparent liquid
Density(ρ20, g/cm3)	0.9718±0.0050
Refractive Index(n25D)	1.3925±0.0050
Purity	98%

Applications

PolymerModification

Vinyltrimethoxysilaneis used to modify polyethylene and other polymers by grafting its vinyl groupto the polymer backbone using a radical initiator, such as peroxide. Thisprovides a polymer with pendant trimethoxysilyl groups that may be used asmoisture-activated crosslinking sites via hydrolysis of the alkoxy groupsfollowed by condensation of the resulting silanols.

Crosslinking ofSilane-Grafted Polymers

The reaction ofSilane-grafted polyethylene to form a crosslinked or vulcanized polyethyleneuses water to form the crosslinks. This technology is widely used around theworld for commercial applications in wire and cable insulation, tubing, andother similar uses.

The basicreaction sequence is as follows: polyethylene is reacted (grafted) withvinyltrimethoxysilane, using a peroxide initiator, in an extruder. The graftedpolyethylene is then formed into a finished product, such as cable jacketing,wire insulation, or pipe. The forming step is usually done by a secondextrusion, during which a catalyst for the moisture-cure step is added.Finally, the formed article is exposed to moisture or hot water to causehydrolysis of the Silane and condensation to form crosslinks via Si-O-Si bondformation.

Benefits ofCrosslinking

Higher maximumuse temperature

Reduceddeformation under load (creep)

Improvedchemical resistance

Superior environmentalstress crack resistance

Increasedabrasion resistance

Improved impactstrength

Memorycharacteristics (shrink film, tubing)

Improved impactstrength

Advantages ofSilane Crosslinking over Radiation or Peroxide Crosslinking

Low capitalinvestment

Low operating(energy) costs

Higherproductivity

Processingversatility

Thick, thin, orvariable thicknesses possible

Complex shapspossible

Wilderprocessing latitude (control of premature crosslinking)

Useful withfilled composites

Applicable toall polyethylene densities and copolymers.

Packing

210LIron Drum: 200kg/drum

1000LIBC Container: 950kg/container