A new near-zero-VOC epoxy silane oligomer Y-19158: Applications in architectural coatings

 
Epoxy-functional alkoxysilanes are used extensively in a variety of coating formulations to provide cross-linking, improved adhesion and filler binding among other properties. One disadvantage of alkoxysilanes is their liberation of alcohol during hydrolysis. This generated alcohol contributes to the overall system VOC and may have other detrimental effects on final coating properties. To address this, a new near-zero VOC epoxysilane has been developed. This new material does not rely on the use of alkoxy groups leading to an alcohol generation potential of <1 wt%. This allows silane benefits in formulations with strict VOC requirements targeted to satisfy regulations or obtain "green" certifications like Blue Angel that limit VOC to 700 ppm. In this paper the performance benefits of the new material in near-zero VOC water-borne architectural coating formulations will be discussed.