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  • Siwin-V31
  • Siwin
  • Siwin-V31
  • 2768-02-7



The Equivalent List

   A-171          Z-6300      KBM-1003         VTMO            XL10

Typical Physical Properties  

Product No.:                   Siwin-V31

Chemical Name:               Vinyltrimethoxysilane

CAS NO.:                   2768-02-7

EINECS NO.:               220-449-8

Formula:                       C5H12O3Si

Appearance:                   Colorless Transparent Liquid

Density(ρ20℃,g/m³):       0.9718±0.0050

Refractive Index( n 25℃ ):       1.3925±0.0050

Purity(by GC,%):               99%


Polymer Modlfication

Siwin-V31 is used to modify polyethylene and other polymers by grafting its vinly group to polymer backbone using a radical initiator, such as peroxide.This provides a polymer with pendant trimethoxysilyl groups that may be used as moisture-activated crosslinking sites via hydrolysis of the alkoxy groups followed by condensation of the resulting silanols.

Crosslinking of Silane-Grafted Polymers

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

The basic reaction sequence is as follows: polyethylene is reacted (grafted) with vinyltrimethoxysilane, using a peroxide initiator, in an extruder. The grafted polyethylene is then formed into a finished product, such as cable jacketing, wire insulation, or pipe. The forming step is usually done by a second extrusion, during which a catalyst for the moisture-cure step is added. Finally, the formed article is exposed to moisture or hot water to cause hydrolysis of the Silane and condensation to form crosslinks via Si-O-Si bond formation.

Benefits Crosslinking

Higher maximum use temperature Reduced deformation under load (creep) Improved chemical resistance.

Superior environmental stress crack resistance Increased abrasion resistance.

Improved impact strength。

Memory characteristics (shrink film, tubing) Improved impact strength.

Advantages of Silane Crosslinking over Radiation or Peroxide Crosslinking

Low capital investment.

Low operating (energy) costs Higher productivity Processing versatility.

Thick, thin, or variable thicknesses possible Complex shaps possible.

Wilder processing latitude (control of premature crosslinking) Useful with filled composites.

Applicable to all polyethylene densities and copolymers.


210L Iron Drum:200kg/drum

1000L IBC Container:950kg/container

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