Dynasylan® 1175

Dynasylan® 1175 can be used in many applications:

• Examples are:
• As a size constituent or finish for glass fiber/ glass fabric composites
• As a primer or additive for sealants and adhesives
• For the pretreatment of fillers and pigments for mineral­filled composites
• As a primer and/or additive for paints and varnishes to improve adhesion to the substrate

Important product effects that can be achieved through the use of Dynasylan® 1175 are:

• Improved mechanical properties: e.g. flexural strength, tensile strength, impact toughness, modulus of elasticity
• Improved electrical properties: e.g. dielectric constant, specific volume resistance

Dynasylan® 1175 may also be used to improve processing properties such as:

• Better polymer wetting
• Elongated gelation time of resins
• Immediate solubility in water

• Dynasylan® 1175 may be used for substrate pretreatment as an approx. 0.2­2 wt.% solution in organic solvents or as a constituent of an aqueous size.

• In the presence of water, the methoxy groups of Dynasylan® 1175 hydrolyze form reactive silanol groups which can bond to a variety of inorganic substrates.
• The organophilic cationic amino group of Dynasylan® 1175 can react with a suitable polymer.
• Because Dynasylan® 1175 possesses both an amino group and a reactive double bond it can react with amine­reactive polymers and also with free­radical reactive polymers.
• The cationic structure provides antistatic properties and, in many applications, particularly good wetting of the resin.
• In addition these characteristics lead to immediate solubility in water even at pH 7.
• Due to the elevated chloride content compared to standard aminosilanes it causes an increased gelation time of e.g. an epoxy resin.
• Therefore air is likely not to be entrapped in the resin.
• Hydrolysis of Dynasylan® 1175 is preferably carried out in the presence of acetic acid (pH 3­4).
• Examples of suitable inorganic substrates are glass, glass fibers, glass wool, mineral wool, silica, quartz, sand, cristobalite, wollastonite, and mica as well as aluminum hydroxide, kaolin, talc, other silicious fillers, metal oxides and metals.
• Dynasylan® 1175 may be used with such polymers as epoxy, methacrylate and unsaturated polyester resins, polyurethanes, PA, PBT, PC, EVA, modified PP, PVB, PVAC and acrylics.

• Dynasylan® 1175 is supplied in 25 kg pails or in 170 kg drums.

• Dynasylan® 1175 should be stored in a cool, well­ventilated place protected from moisture.
• In the unopened container
• Dynasylan® 1175 has a shelf life of twelve months.