Dynasylan® SIVO 214
Dynasylan® SIVO 214 is an aminofunctional silane composition with improved crosslinking activity which acts as an adhesion promoter between inorganic materials (for example glass, metals and fillers) and organic polymers (thermosets, thermoplastics and elastomers), as a surface modifier and for chemical modification of substances.
Scope of Application
Dynasylan® SIVO 214 is an important additive for many applications. Examples are: glass fiber 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, furan and melamine resins sealants and adhesives: as primer or additive mineral-filled polymers (composites) or HFFR cables: for pretreatment of fillers and pigments paints and coatings: as additive and primer for improving adhesion to the substrate. SIVO 214 can be used as pretreatment (e.g. by dipping, spraying or coating) or may be added directly to the resin matrix as additive. If SIVO 214 is used as additive, the compatibility with the resin matrix has to be tested before. SIVO 214 may be used: as aqueous solutions (e.g. in glass fiber sizes) or neat (e.g. as additive in resins). SIVO 214 can be dissolved in water at pH 9 or pH 4-5 including an acid catalyst. Hydrolysis in water can take place at pH 9 and pH 4-5. For pH 9: 1.0 g SIVO 214 is stirred in 99.0 g 0.2 % acetic acid.For pH 4-5: 1.0g SIVO 214 is stirred in 99.0 g 0.4 % acetic acid. Upon stirring for 1 h, the clear hydrolysate is ready for use. The most important effects which can be achieved using Dynasylan® SIVO 214 are: - improvement in product properties, such as flexural strength, tensile strength, impact strength and modulus of elasticity moisture and corrosion resistance electrical properties, for example dielectric constant, volume resistivity - improvement in processing properties, such as adhesion filler dispersion rheological behaviour: reduction in viscosity, Newtonian behaviour higher filler loading