Dynasylan® 1124

Dynasylan® 1124 is an important additive in many applications.
Examples are:

• Metal primers
• Mineral fiber insulating materials, abrasives: as additive to phenolic resin binders
• Foundry resins: as additive to phenolic, furan and melamine resins
• Adhesives and sealants: as primer or additive
• Mineral-filled composites: for pre-treatment 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® 1124 are:
Improvement in product properties, such as

• Flexural strength, tensile strength, impact strength and modulus of elasticity
• Moisture and corrosion resistance
• Durability at high temperature and humidity
• Improvement in processing properties, such as
• Wet-out
• Homogeneous distribution of inorganic fillers in polymer matrices
• l higher filler loading
• Excellent primerless adhesion
• Rheological behavior: reduction in viscosity, Newtonian behavior

• Dynasylan® 1124 can advantageously be employed in organic solvents or added in situ as a pure substance to the polymer.
• 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® 1124 is a bifunctional organosilane possessing a reactive secondary amine where the silicon-functional methoxy- groups 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 alkoxy substituents present in one molecule, Dynasylan® 1124 is exceptionally suitable to form highly crosslinked networks on and between substrates and in organic matrices.
• The hydrolysis of Dynasylan® 1124 in water takes place by acidic catalysis (e.g. formic or acetic acid at a pH of 2-3).
• In order to achieve primer solution in organic solvents simply add 2-4 wt.-% of water per wt.-% of Dynasylan® 1124.
• Upon stirring for 5h the solutions are ready for use.
• 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® 1124 provides high basicity at somewhat lower reactivity compared to primary amino groups.
• This is of major advantage in adhesives and sealants where the silane is added to form e.g. silane capped urethane prepolymers.
• Exceptional crosslinking properties make Dynasylan® 1124 a preferred component in the silylation of inorganic filler surfaces and in corrosion-resistant primer systems for metal pre- treatment.

• In the unopened container Dynasylan® 1124 has a shelf life of min. 12 months from delivery.