Abstract: A stable oxygen containing dentifrice in powder form which contains a carrier and evenly dispersed therethrough a multiplicity of microencapsulated droplets of an oxygen releasing agent such as hydrogen peroxide. The walls of the microcapsules are rupturable upon mechanical manipulation of the dentifrice as it occurs during the toothbrushing action for releasing the oxygen-containing agent.

Abstract: A liquid or viscous curable adhesive composition having a prolonged pot life which is composed of a liquid or viscous curable resin which has, preferably evenly and randomly dispersed therethroughout, a multiplicity of rupturable microcapsules containing a curing agent in an amount sufficient to cure the resin. The microcapsules are rupturable upon the application thereto of external pressure, or other mechanical manipulation. Upon rupture, the curing agent is released into coacting relationship with the curable resin and forms therewith an activated adhesive composition.