CAS No.: 1760-24-3

Due to the specific reactivity of the 2-aminoethylaminopropyl structure, using GENIOSIL® GF 91 as an adhesion promoter in glass-fiber reinforced or filler modified plastics reduces the filler's sedimentation tendency and improves dispersibility and numerous mechanical properties (e.g. flexural strength, tensile strength, modulus of elasticity) of these composites. The use of GENIOSIL® GF 91 in these materials also results in a markedly improved resistance to water, vapor and corrosion. Electrical properties, such as volume resistivity and the dielectric constant, are also positively influenced.

Special features: GENIOSIL® GF 91 is an alkoxysilane with an aminofunctional group. It is a clear, colorless to light yellow liquid with a characteristic amine odor. Compared to GENIOSIL® GF 9, it is additionally purified by distillation so it offers extremely high purity and, above all, a very low chloride content. Due to the nature of its amino group, GENIOSIL® GF 91 reacts as a strong base. The silane hydrolyzes auto catalytically in the presence of moisture (methanol is released) to form silanols, which can then react with themselves to produce siloxanes or can bind to inorganic substrates. As a typical amine, GENIOSIL® GF 91 can also interact with numerous organic polymers and thus function as a molecular bridge between organic and inorganic substrates.

Application: GENIOSIL® GF 91 is mainly used as a surface modifier for glass fibers, glass-fiber fabrics, fillers (e.g. glass or mineral wool, mica, talc, wollastonite, kaolin, christobalite, metal oxides) and pigments used in various plastics, including epoxy resins, polyamides, polyacrylates, polyurethanes, ethylene/vinyl acetate copolymers and many others. Other important applications include its uses as an adhesion promoter in polysulfides and phenolic resins for abrasives and insulating materials and as a primer for sealants, adhesives and coatings.

Information provided by Wacker Chemie AG.