$GENIOSIL<sup>®</sup> DAPTM



GENIOSIL® DAPTM is a clear, colorless to light yellow liquid with a characteristic amine odor.

  • CAS No. 1760-24-3
  • Empirical formula C8H22N2O3Si
  • Molecular weight 222,36


GENIOSIL® DAPTM is an alkoxysilane with an amino-functional group. Due to the nature of its amino group, GENIOSIL® DAPTM reacts as a strong base. The silane hydrolyzes autocatalytically 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® DAPTM can also interact with numerous organic polymers and thus function as a molecular bridge between organic and inorganic substrates.

1. General processing information: GENIOSIL® DAPTM is highly miscible with organic sol-vents, such as ethers and hydrocarbons. Mixing with ketones results in imine formation, while mixing with alcohols other than methanol leads to an autocatalytic exchange of alkoxy groups until the system reaches the thermodynamic equilibrium. GENIOSIL® DAPTM demonstrates typical amine behavior when exposed to acids, epoxides or isocyanates. GENIOSIL® DAPTM is highly soluble in neutral water. Caution: due to the enthalpy of solution, mixing GENIOSIL® DAPTM with water is exothermic. It is recommended that GENIOSIL® DAPTM is added to water, not vice versa, while stirring. A 2 wt % solution of GENIOSIL® DAPTM in water has a pH of 10 -11 and remains stable for several weeks. Due to the reactive nature of GENIOSIL® DAPTM, contact with moisture must be avoided during prevent undesired hydrolysis.

2. GENIOSIL® DAPTM in glass-fiber reinforced or mineral-filled polymers: Fillers are treated either with pure GENIOSIL® DAPTM or a solution thereof. It may be necessary to pretreat the substrate with water. The modified filler is preferably bonded to the organic material, e.g. an epoxy resin, by mixing it with a standard amine curing agent. In an alternative procedure referred to as "blending", GENIOSIL® DAPTM 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® DAPTM and the polymer are compatible and that the resin and GENIOSIL® DAPTM do not react prematurely.

3. GENIOSIL® DAPTM as a surface modifier: Used as a primer, GENIOSIL® DAPTM is applied as an aqueous or organic solution to an inorganic substrate (e.g. metal or glass surfaces). Once GENIOSIL® DAPTM has dried and bonded to the surface, an organic coating may be applied using a standard technique (e.g. spraying or knife coating). GENIOSIL® DAPTM 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 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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WACKER has a global network of specialist distributors at its disposal. Please select an application so that we can suggest suitable contacts.

Brenntag North America
1 Cragwood Road Suite 302
812021 South Plainfield
1  6109266100 (Phone)
1 6109163782  (Fax)
Contact distributor Website
Brenntag North America
1 Cragwood Road Suite 302
812021 South Plainfield
1  6109266100 (Phone)
1 6109163782  (Fax)
Contact distributor Website


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