Vinyltrimethoxysilane Polymer Modification Silane Crossling Agent CAS. 2768-02-7

• CAS No.: 2768-02-7
• Formula: C5h12o3si
• Color: Colorless
• Appearance: Liquid
• Transport Package: Iron Drum or IBC Drum
• Specification: 99%min
• Model NO.: Siwin-V31
• Trademark: Siwin
• Origin: China
• HS Code: 2931900090
• Production Capacity: 100000

Product Description

 

  

Typical properties

 

Product No.	Siwin-V31
Chemical Name	Vinyltrimethoxysilane
CAS NO.	2768-02-7
Formula	C5H12O3Si
Appearance	Colorless Transparent Liquid
Density(ρ20ºC,g/m³)	0.9718±0.0050
Refractive Index( n 25ºC )	1.3925±0.0050
Purity (by GC,%)	99min
Chemical Structure

 

Application

Polymer Modification
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.

 

 

Package/Storage

210L Iron Drum:190kg/drum
1000L IBC Container:950kg/container

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