Dynasylan® 1122

Dynasylan® 1122 is an important additive in many applications.
Examples are:

• Glass fiber/glass fabric composites: as size constituent or finish
• Metal primers
• Mineral fiber insulating materials, abrasives: as additive to phenolic resin binders
• Foundry resins: as additive to phenolic, furane and melamine resins
• Adhesives and sealants: as primer or additive
• Mineral­filled polymers (composites) or HFFR cables: for pretreatment of fillers and pigments
• Paints and coatings: as additive and primer for improving adhesion to the substrate

The most important effects which can be achieved using Dynasylan® 1122 are:
Improvement in product properties, such as

• Flexural strength, tensile strength, impact strength and
• modulus of elasticity
• Moisture and corrosion resistance
• improvement in processing properties, such as
• Adhesion
• Filler dispersion
• Rheological behavior: reduction in viscosity, Newtonian behavior
• Higher degree of filling

• Dynasylan® 1122 can advantageously be employed in organic solvents, as constituent of aqueous sizes, as pure substance or added to the polymer as an additive.
• In higher concentrations (1-­5 wt.­%) chemical modification can be achieved by reaction with suitable functional monomers or polymers, for example those containing epoxy groups.

• Dynasylan® 1122 is a bifunctional organic compound in which the silicon­functional ethoxy­groups hydrolyze in the presence of water to form reactive silanols, which can be bonded to an inorganic substrate; the organophilic amino group can interact with a suitable polymer.
• Due to 6 hydrolyzable substituents present in one molecule, Dynasylan® 1122 is exceptionally suitable to form highly crosslinked networks on and between substrates and in organic matrices.
• The hydrolysis of Dynasylan® 1122 in water takes place by acidic catalysis (e.g. formic or acetic acid at a pH of 2­3).
• In order to achieve solubility in organic solvents simply add 2­4 wt.­% of water per wt.­% of Dynasylan® 1122.
• Upon stirring for 5h the solutions are ready for use.
• Examples of suitable inorganic substrates are glass, glass fibers, glass wool, mineral wool, silicic acid, quartz, sand, cristobalite, wollastonite and mica; also suitable are aluminum hydroxide, kaolin, talc, other silicate fillers, metal oxides and metals.
• Examples of suitable polymers are epoxy resins, polyurethanes, phenolic resins, furan resins, melamine resins, PA, PBT, PC, EVA, modified PP, PVB, PVAC, PVC, acrylates and silicones.
• The secondary amino group in Dynasylan® 1122 provides high basicity at somewhat lower reactivity compared to primary amino groups.
• This is of major advantage in e.g. adhesives and sealants where the silane is added to the polymer matrix:
• Homogeneous distribution and bonding/networking of Dynasylan® 1122 to the inorganic filler can commence unless bonding to organic materials (e.g. polymers) will proceed. Moreover, Dynasylan® 1122 has been successfully used as a component in aqueous PA­ and PU­sizes for glass fibers.

• Dynasylan® 1122 has a shelf life of at least of 12 months.