Evonik offers a novel, epoxyfunctional silane resin as adhesion promoter with excellent benefits for adhesive and sealant formulations. These additives improve the adhesion of 1K/2K epoxy, 1K/2K polyurethane, water borne and rubber systems. In addition, these adhesion promoters lead to improved strength, reduced VOC formation, advantages in labeling, improved hydrophobicity of the cured formulations and increased storage stability in water borne formulations.
The adhesive bond based on VPS 4721 tolerates up to > 20% greater shear force before cohesion failure as compared to the adhesive based on Dynasylan® GLYMO adhesion promoter.