GENIOSIL^® VTM

1. General processing information
GENIOSIL^® VTM is very good miscible with typical organic solvents like e.g. toluene or acetone. Mixing with alcohols other than methanol leads to slow equilibration until the thermodynamic equilibrium is achieved. Addition of catalysts (e.g. acetic acid) can significantly accelerate this reaction. Under influence of moisture especially in the presence of such catalytically active substances hydrolysis accompanied by formation of methanol occurs quickly followed by condensation and formation of siloxanes.

2. GENIOSIL^® VTM as an additive in silane-crosslinking formulations:

In silane-crosslinking formulations (e.g. silane-terminated polyethers, polyurethanes and polysiloxanes), GENIOSIL^® VTM is mixed into the formulation as an additive to prevent premature crosslinking due to traces of moisture. Processing is effected by means of standard mixing methods (e.g. paddle agitator, highspeed stirrer, kneader). GENIOSIL^® VTM can be added before or during incorporation of the polymer. The amount added will depend on the water content and pre-treatment of the components; usually around one percent by weight is required.

3. GENIOSIL^® VTM as a co-monomer in polymer dispersions:

To incorporate GENIOSIL^® VTM in organic polymer dispersions by way of co-polymerization, it is added as as co-monomer – along with typically used monomers (e.g. ethylene, vinyl acetate, styrene, acrylate) and free radical initiators (diazo compounds or peroxides) – during production of the emulsion polymer.

4. Grafting of GENIOSIL^® VTM to polyolefins:

The radical grafting of GENIOSIL^® VTM to polyolefins, such as HDPE and LDPE, is typically effected via reactive extrusion, using peroxides as catalysts. Usually, 1 - 2 wt % GENIOSIL^® VTM is required, expressed in terms of the polyolefin. Polyolefins grafted with GENIOSIL^® VTM are moisture-cured after molding.