Abstract:
Described herein is an apparatus for applying and curing a light-curable material on a work surface. The apparatus includes a nozzle from which the light-curable material is applied to the work surface to form a layer of light-curable material on the work surface. The layer of light-curable material has a leading edge and a trailing edge defined according to a direction of movement of the nozzle relative to the work surface. The apparatus also includes a light source fixed relative to the nozzle. The light source is operable to direct a light beam to the trailing edge of the layer of light-curable material.
Abstract:
A low viscosity polysulfide sealant composition. The composition comprises a curable polysulfide polymer; a crosslinking agent; and a plurality of core-shell particles. The core-shell particles comprise: a core comprising a ferromagnetic material; and a shell comprising silica treated with an organic sulfur containing compound. The shell is capable of bonding with the polysulfide polymer.