Silquest Y-11699 is a secondary aminofunctional bis-silane. This category of silanes is generally useful to consider for a broad range of applications to promote adhesion in coatings, adhesives and sealants between organic polymers and glass, metal, wood or cast plastic substrates.

Typically, they can function as coupling agents to particulate mineral fillers in composites, as in foundry molds and cores, to improve mechanical properties such as tensile and flexural strengths.

These property improvements have been maintained in the presence of aggressive environments, such as high temperature and high humidity conditions.

Key Features and Benefits

• Bis-silyl functionality – generally affords greater bonding or adhesion promotion to inorganic substrates.
• Secondary amino functionality – can typically improve shelf stability in various resin systems.
• Ethoxy silane ester version Silquest Y-11699 silane generally provides a controlled cure with a by-product of the coupling or crosslinking mechanisms that have a lower impact on the environment.

Potential Applications

Amino bis-silanes such as Silquest Y-11699 have been shown to be effective in reacting with epoxy, urethane, melamine, polyimide, phenolic and furan thermosetting resins as well as many thermoplastics, such as polyamides and polyesters.

Durable water-resistant bonds are generally achieved when the silyl portion of these aminosilanes are condensed with an inorganic surface and are covalently bonded with the resin matrix of the composite, paint, adhesive or sealant.

The bis-alkoxysilane structure of the Silquest Y-11699 silane results in the addition of two silyl groups to a resin. This typically yields more durable wet adhesion and more efficient bonding per mole of added silane.

Silquest Y-9627 silane may be considered for similar reactivity with potential savings..

These versatile silanes typically can be added directly to polymers during system formulation, or used independently as primers.