$GENIOSIL<sup>®</sup> VTE



GENIOSIL® VTE is a clear, colorless liquid with a characteristic aromatic odor.

  • CAS No. 78-08-0
  • Empirical formula C8H18O3Si
  • Molecular weight 190,31 g/mol


GENIOSIL® VTE is an alkoxyvinylsilane. It´s a clear, colorless liquid with a characteristically aromatic odor. It hydrolyzes in the presence of moisture (ethanol is released) to form silanols, which can then react with themselves to produce siloxanes. As a bifunctional molecule, GENIOSIL® VTE is able to function as a molecular bridge between organic and inorganic substrates.

The use of GENIOSIL® VTE as a co-monomer in polymers results in binders which, among other advantages, exhibit much improved wet scrub resistance and abrasion resistance thanks to crosslinking and better adhesion to the substrate. Silane-modified thermoplastics obtained by grafting with GENIOSIL® VTE can be processed further using standard techniques. On exposure to moisture (e.g. water bath, climatic chamber), the silyl groups condense (ethanol is released) and function as crosslinking and/or adhesion points. By treating fillers with GENIOSIL® VTE, mineral-filled polymers can be obtained which exhibit improved mechanical and electrical properties. In addition, the particles are rendered strongly water repellent, which results in improved filler dispersibility and thus facilitates processing. Organic surface coatings will adhere more strongly to inorganic substrates that have been treated with GENIOSIL® VTE. As a result, these coatings demonstrate markedly greater scratch resistance and resistance to chemicals.

1. General processing information:

GENIOSIL® VTE dissolves readily in standard organic solvents, but is practically insoluble in neutral water. GENIOSIL® VTE hydrolyzes in acidified water (pH approx. 4 - 5) to silanols, the diluted solutions of which remain stable for some time.


2. GENIOSIL® VTE as a polymer building block:

To incorporate GENIOSIL® VTE into organic polymers, it is added as a co-monomer - along with typically used monomers and free-radical initiators (diazo compounds or peroxides) - during production of the solution or emulsion polymer. Grafting of GENIOSIL® VTE to polyolefins, such as LDPE and HDPE, is usually effected via peroxide-initiated reactive extrusion. Polyolefins grafted with GENIOSIL® VTE are moisture-cured following molding.


3. GENIOSIL® VTE as a coupling agent:

Fillers are treated either with pure GENIOSIL® VTE or a solution thereof. It may be necessary to pretreat the substrate with water and/or a catalyst. Subsequent binding of the modified filler to organic polymers is preferably effected via grafting during extrusion. Used as a primer, GENIOSIL® VTE is applied to an inorganic substrate, such as a metal surface, in the form of an aqueous or alcoholic solution. After GENIOSIL® VTE has dried and bonded to the surface, an organic coating may be applied using a standard technique.


GENIOSIL® VTE is used in the production of silane-modified polymers that serve as binders in paints and adhesives. GENIOSIL® VTE is also used in the manufacture of pipes and cables made of silane-crosslinked polyethylene (PE-Xb). In addition, GENIOSIL® VTE serves as an adhesion promoter in primers and coatings, and is used in the production of organically modified fillers for cable insulation.


Information on available container sizes is obtainable from WACKER subsidiaries.


The 'Best use before end' date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

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