GENIOSIL® GF 31 US
GENIOSIL® GF 31 is an alkoxysilane with a methacrylic
organofunctional group. It´s a clear, colorless, light and heat sensitive liquid with a characteristically sweet odor. The silane hydrolyzes in the presence of moisture (methanol is released) to form silanols, which can then react with themselves to produce siloxanes. As a organically unsaturated molecule, GENIOSIL® GF 31 US can be incorporated into organic bifunctional polymers via radical grafting.
Datenblätter
GENIOSIL® GF 31 US is mainly used in glass fiber or glass fabric-reinforced polyester and polyolefin molded components. In addition, GENIOSIL® GF 31 is used as a surface modifier for fillers and pigments used in thermosetting plastics (e.g. polyacrylates, polyesters), thermoplastics (polyesters, polyolefins) and elastomers, as well as a polymer component in surface coatings. Further important areas of application are heat and/or radiation-curable adhesives and sealants.
GENIOSIL® GF 31 US is highly miscible with standard organic solvents, such as alcohols, toluene and acetone.
GENIOSIL® GF 31 US is practically insoluble in neutral water. However, by adjusting the pH to between 3 and 4 with a hydrolysis catalyst (e.g. acetic acid), an aqueous solution of up to 5 percent by weight can be obtained. The resulting clear solution should be used as soon as possible (within 1-2 days), before siloxane formation has proceeded too far. Deactivation of GENIOSIL® GF 31 US by siloxane formation becomes apparent when an aqueous solution of this silane becomes cloudy.
Fillers are treated either with pure GENIOSIL® GF 31 US or with a solution thereof. It may be necessary to pretreat
the substrate with water and/or a catalyst. Subsequent binding of the treated filler to unsaturated polyester
resins, for example, is preferably effected via peroxide or radiation initiated copolymerization or grafting. In an
alternative procedure referred to as "blending",
GENIOSIL® GF 31 US is added directly to the polymer either before the organic materials is compounded with the filler or at the same time. A prerequisite for the blending process is that GENIOSIL® GF 31 US and the polymer are
compatible and that the resin and GENIOSIL® GF 31 US do not react prematurely.
Used as a primer, GENIOSIL® GF 31 US is applied as an aqueous or organic solution to an inorganic substrate
(e.g. metal or glass surfaces). Once GENIOSIL® GF 31 US has dried and bonded to the surface, an organic coating may be applied using a standard technique (e.g. spraying or knife coating).
To incorporate GENIOSIL® GF 31 US in organic polymers, it is added as a co- monomer - along with typically used
monomers and free-radical initiators such as diazo compounds or peroxides - during production of the solution or emulsion polymer. Promoters (e.g. cobalt compounds) can give additional impetus to the radical grafting of GENIOSIL® GF 31 US to organic polymers. The polymers obtained in this way can be formulated as coatings, adhesives or sealants.
Verpackung / Gebinde
Information on available container sizes is obtainable from WACKER subsidiaries.
Lagerung
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.
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