| abstract |
The present invention is directed to emulsions comprising poorly water-soluble or semi-soluble silanes, or mixtures thereof, that have been found useful when used alone or formulated in aqueous primer formulations to facilitate adhesion of sealants, adhesives or coatings to various substrates. It is about. These aqueous primers are suitable for both inorganic and organic substrates whose surfaces are porous or nonporous. These have been found to be solvent based primers with good performance in many cases. Primers of this type can be used with various aqueous or solvent based sealants, adhesives or coatings, including acrylic acid or polyurethane latex, high solids polyurethane epoxies and silanes. When used with an aqueous system, there is no need to wait for the primer to dry before applying the sealant, adhesive or coating. |