Properties

TY-550 is a bifunctional silane possessing a reactive primary amino group and hydrolyz- able ethoxysilyl 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, elastomers) thus functioning as an adhesion promoter, crosslinker, and/or surface modifier. It also greatly increases water (vapor) and corrosion resistance.

TY-550 is a clear, colorless low-viscosity liquid with a characteristic amine odor. It is soluble in alcohols, and aliphatic or aromatic hydrocarbons. In addition it is completely and immediately soluble in water (with reaction)

Technical data

Reactivity

In the presence of water, the ethoxy groups of TY-550 hydrolyze and form reactive silanol (Si-OH) groups which can bond to a variety of inorganic substrates. Upon hydrolysis ethanol is released. The organophilic amino group can react with a suitable polymer. The hydrolysis takes place autocatalytically and the pH of the aqueous solution is about 11.

Examples of suitable inorganic substrates are glass, glass fibers, glass wool, mineral wool, silicic acid, cristobalite, wollastonite, mica and aluminum trihydrate, magnesium dihydrate, kaolin, talc, other silicate fillers, metal oxides and metals.

TY-550 may be used with such polymers as epoxy, phenolic, furan and melamine resins, polyurethanes, PA, PBT, PC, EVA, modified PP, PVB, PVAC, PVC, PS, nitril Kautschuk, polyester, acrylates and silicones.

It can undergo reactions with ketone or ester solvents. Silane or silanized substrates can react with carbon dioxide to form the corresponding carbonates and/or carbamates. Product modifications are possible through addition reactions with suitable monomeric or polymeric compounds (e.g. isocyanates).

Application and performance

Coatings, adhesives and sealants

This aminosilane is an excellent adhesion promoter in acrylic coatings, adhesives and sealants. With polysulfide, urethane, RTV silicones, epoxy, nitrile, phenolic adhesives and sealants, the product can

help improve pigment dispersion and maximizes adhesion to glass, aluminum and steel.

Glass-reinforced resin systems

In glass-reinforced thermosets, TY-550 silane can help enhance the flexural, compressive and interlaminar shear strengths before and after exposure to humidity. This product can help greatly improve wet electrical properties. Glass-reinforced thermoplastics, polyamide, polyester and polycarbonate typically exhibit increased flexural and tensile strengths before and after wet exposure when this silane is used.

Glass fiber and mineral wool insulation

As a phenolic resin binder additive, TY-550 imparts moisture resistance and allows recovery after compression.

Mineral-filled resin systems

TY-550 can help maximize the physical and electrical properties of mineral-filled phenolic, epoxy, polyamide, polybutylene terephthalate and many other thermoset and thermoplastic composites. Filler wetting and dispersibility in polymer matrix are also typically improved.

Foundry applications

In shell molding, it can help strengthen the bond between the phenolic binder and foundry sand.

Grinding wheels

The product can help promote an improved, water-resistant bond between the abrasive grit and phenolic resin binder.