VinyltrimethoxySilane CAS NO.2768-02-7

introduction

(cas#2768-02-7) vinyltrimethoxysilane, a-171/z-6300/kbm-1003/xl10/vtmoeo

other names : a-171,z-6300,kbm-1003,dynasylan vtmo
cas no. : 2768-02-7
einecs no.: 220-449-8
molecular formula: c5h12o3si

technical data

applications:

polymer modification: vinyltrimethoxysilane is used to modify polyethylene and other polymers by grafting its vinyl group to the 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.