Properties

TY-560 is a bifunctional silane possessing a reactive organic epoxide and hydrolysable inorganic methoxysilyl groups. The dual nature of its reactivity allows it to bind chemically to both inorganic materials (e.g. glass, metals, fillers) and organic polymers (e.g. thermoplastics, thermosets or elastomers) thus functioning as adhesion promoter, cross- linker, and/or surface modifier.

The use of TY-560 as a coupling agent in mineral-filled plastics improves filler dispersibility, reduces its sedimentation tendency and greatly lowers the resin's viscosity. In addition, it leads to higher filler loading and a marked increase in water (vapor) resistance, as well as resistance to acids and bases. As a component of adhesives and sealants, TY-560 improves both adhesion to the substrate and mechanical properties such as flexural strength, tensile strength and modulus of elasticity.

It is a clear, colorless low-viscosity liquid with a slight terpentine-like odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons.

Technical data

Reactivity

In the presence of water, the methoxy groups of TY-560 hydrolyze to form reactive silanol groups which can bond to a variety of inorganic substrates. The organophilic epoxy group can undergo a ring-opening reaction with nucleophiles such as alcohols and amines. An acidic or basic catalyst may be required.

Examples of suitable inorganic substrates are glass, glass fibers, quartz, cristobalite and metals. It may be used with such polymers as epoxy, phenolic, polyurethanes, polysulfides, PVAC, acrylates.

Application and performance

TY-560 is an essential ingredient in the products of many industries. Examples are:

• Glass fiber/glass fabric composites: as a finish or a size ingredient.
• Foundryresins: as an additive to polyurethane resins.
• Sealants and adhesives: as a primer or additive.
• Mineral filled composite: for pretreat- ment of fillers and pigments or as an additive to the polymer.
• Paints and coatings: as an additive and as a primer for improving adhesion to the substrate, especially glass and metal.

• Improved shelf life over aminosilanes in polyurethanes.

Important functional effects that can be achieved through the use of TY-560 include:

• Improved mechanical properties, such as flexural strength, tensile strength, impact strength and modulus of elasticity.
• Improved moisture and corrosion resistance.
• Improved electrical properties, such as dielectric constant, volume resistivity. Enhanced electrical properties of epoxy based electronic encapsulant and package -ing materials, resulting from improved bonding between resin and substrate or filler.

TY-560 can also improve such processing properties as

• Rheological behavior(i.e. viscosity reduction) and Newtonian behavior.
• Increased filler dispersion and loading.
• None yellowing.